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Mitsubishi Electric PQHY-P200YLM-A Service Handbook
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Mitsubishi Electric PQHY-P200YLM-A Service Handbook

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Summary of Contents for Mitsubishi Electric PQHY-P200YLM-A

  • Page 2: Safety Precautions

    Safety Precautions Before installing the unit, thoroughly read the following safety precautions. Observe these safety precautions for your safety. WARNING This symbol is intended to alert the user to the presence of important instructions that must be followed to avoid the risk of serious injury or death.
  • Page 3 WARNING Securely attach the terminal block cover (panel) to the After completing the service work, check for a gas unit. leak. If the terminal block cover (panel) is not installed properly, If leaked refrigerant is exposed to a heat source, such as a dust and/or water may infiltrate and pose a risk of electric fan heater, stove, or electric grill, poisonous gases may be shock, smoke, and/or fire.
  • Page 4 Precautions for handling units for use with R410A CAUTION Do not use the existing refrigerant piping. Use a vacuum pump with a reverse-flow check valve. A large amount of chlorine that is contained in the residual If a vacuum pump that is not equipped with a reverse-flow refrigerant and refrigerator oil in the existing piping may check valve is used, the vacuum pump oil may flow into the cause the refrigerator oil in the new unit to deteriorate.

  • Page 5: Before Installing The Unit

    Before installing the unit WARNING Do not install the unit where a gas leak may occur. When installing the unit in a hospital, take appropriate measures to reduce noise interference. If gaseous refrigerant leaks and piles up around the unit, it may be ignited.

  • Page 6: Electrical Work

    Before installing the unit (moving and reinstalling the unit) and performing electrical work CAUTION Properly ground the unit. Periodically check the installation base for damage. Do not connect the grounding wire to a gas pipe, water pipe, If the unit is left on a damaged platform, it may fall and lightning rod, or grounding wire from a telephone pole.
  • Page 7 Before the test run CAUTION Turn on the unit at least 12 hours before the test run. Do not operate the unit without panels and safety guards. Keep the unit turned on throughout the season. If the unit is turned off in the middle of a season, it may result in malfunc- Rotating, high-temperature, or high-voltage parts on the unit tions.

  • Page 8: Table Of Contents

    CONTENTS I Read Before Servicing [1] Read Before Servicing......................3 [2] Necessary Tools and Materials ....................4 [3] Piping Materials ........................5 [4] Storage of Piping ........................7 [5] Pipe Processing........................7 [6] Brazing............................8 [7] Air Tightness Test........................9 [8] Vacuum Drying (Evacuation) ....................
  • Page 9 CONTENTS [6] Compressor Replacement Instructions................. 384 [7] Water-cooled heat exchanger Replacement Instructions ............. 387 [8] Servicing the BC controller ....................399 [9] Troubleshooting Using the Heat source Unit LED Error Display .......... 402 X LED Monitor Display on the Heat source Unit Board [1] How to Read the LED on the Service Monitor ..............
  • Page 10 I Read Before Servicing [1] Read Before Servicing ....................... 3 [2] Necessary Tools and Materials..................4 [3] Piping Materials ......................... 5 [4] Storage of Piping ....................... 7 [5] Pipe Processing ......................... 7 [6] Brazing..........................8 [7] Air Tightness Test ......................9 [8] Vacuum Drying (Evacuation) ...................
  • Page 11 - 2 - HWE15060...

  • Page 12: Read Before Servicing

    [ I Read Before Servicing ] I Read Before Servicing [1] Read Before Servicing 1. Check the type of refrigerant used in the system to be serviced. Refrigerant Type Multi air conditioner for building application CITY MULTI WY/WR2 YLM-A series: R410A 2.

  • Page 13: Necessary Tools And Materials

    [ I Read Before Servicing ] [2] Necessary Tools and Materials Prepare the following tools and materials necessary for installing and servicing the unit. Tools for use with R410A (Adaptability of tools that are for use with R22 or R407C) 1.

  • Page 14: Piping Materials

    [ I Read Before Servicing ] [3] Piping Materials Do not use the existing piping! 1. Copper pipe materials O-material (Annealed) Soft copper pipes (annealed copper pipes). They can easily be bent with hands. 1/2H-material (Drawn) Hard copper pipes (straight pipes). They are stronger than the O-material (Annealed) at the same radial thickness.
  • Page 15 [ I Read Before Servicing ] 4. Thickness and refrigerant type indicated on the piping materials Ask the pipe manufacturer for the symbols indicated on the piping material for new refrigerant. 5. Flare processing (O-material (Annealed) and OL-material only) The flare processing dimensions for the pipes that are used in the R410A system are larger than those in the R22 system. Flare processing dimensions (mm[in]) A dimension (mm) Pipe size (mm[in])

  • Page 16: Storage Of Piping

    [ I Read Before Servicing ] [4] Storage of Piping 1. Storage location Store the pipes to be used indoors. (Warehouse at site or owner's warehouse) If they are left outdoors, dust, dirt, or moisture may infiltrate and contaminate the pipe. 2.

  • Page 17: Brazing

    [ I Read Before Servicing ] [6] Brazing No changes have been made in the brazing procedures. Perform brazing with special care to keep foreign objects (such as oxide scale, water, and dust) out of the refrigerant system. Example: Inside the brazed connection Use of oxidized solder for brazing Use of non-oxidized solder for brazing 1.

  • Page 18: Air Tightness Test

    [ I Read Before Servicing ] [7] Air Tightness Test No changes have been made in the detection method. Note that a refrigerant leak detector for R22 will not detect an R410A leak. Halide torch R22 leakage detector 1. Items to be strictly observed Pressurize the equipment with nitrogen up to the design pressure (4.15MPa[601psi]), and then judge the equipment's air tight- ness, taking temperature variations into account.

  • Page 19: Vacuum Drying (Evacuation)

    [ I Read Before Servicing ] [8] Vacuum Drying (Evacuation) (Photo1) 15010H (Photo2) 14010 Recommended vacuum gauge: ROBINAIR 14010 Thermistor Vacuum Gauge 1. Vacuum pump with a reverse-flow check valve (Photo1) To prevent the vacuum pump oil from flowing into the refrigerant circuit during power OFF or power failure, use a vacuum pump with a reverse-flow check valve.
  • Page 20 [ I Read Before Servicing ] 7. Notes To evacuate air from the entire system Applying a vacuum through the check joints at the refrigerant service valve (BV1 and 2) is not enough to attain the desired vacuum pressure. Be sure to apply a vacuum through the check joints at the refrigerant service valve (BV1 and 2) and also through the check joints on the high and low pressure sides (CJ1 and 2).

  • Page 21: Refrigerant Charging

    [ I Read Before Servicing ] [9] Refrigerant Charging Cylinder with a siphon Cylinder without a siphon Cylin- Cylin- Cylinder color R410A is pink. Refrigerant charging in the liquid state Valve Valve liquid liquid 1. Reasons R410A is a pseudo-azeotropic HFC blend (boiling point R32=-52°C[-62°F], R125=-49°C[-52°F]) and can almost be handled the same way as a single refrigerant, such as R22.

  • Page 22: Characteristics Of The Conventional And The New Refrigerants

    [ I Read Before Servicing ] [11] Characteristics of the Conventional and the New Refrigerants 1. Chemical property As with R22, the new refrigerant (R410A) is low in toxicity and chemically stable nonflammable refrigerant. However, because the specific gravity of vapor refrigerant is greater than that of air, leaked refrigerant in a closed room will accumulate at the bottom of the room and may cause hypoxia.

  • Page 23: Notes On Refrigerating Machine Oil

    [ I Read Before Servicing ] [12] Notes on Refrigerating Machine Oil 1. Refrigerating machine oil in the HFC refrigerant system HFC type refrigerants use a refrigerating machine oil different from that used in the R22 system. Note that the ester oil used in the system has properties that are different from commercially available ester oil. Refrigerant Refrigerating machine oil Mineral oil...

  • Page 24: Precautions For Servicing

    [ I Read Before Servicing ] [13] Precautions for servicing Control boxes house high-voltage and high-temperature electrical parts. They may still remain energized or hot after the power is turned off. When opening or closing the front cover of the control box, keep out of contact with the internal parts. Before inspecting the inside of the control box, turn off the power, leave the unit turned off for at least 10 minutes, and check that the voltage of the electrolytic capacitor (inverter main circuit) has dropped to 20 VDC or less.
  • Page 25 [ I Read Before Servicing ] - 16 - HWE15060...

  • Page 26: Restrictions

    II Restrictions [1] System configuration ....................... 19 [2] Types and Maximum allowable Length of Cables ............21 [3] Switch Settings and Address Settings ................23 [4] Sample System Connection..................... 29 [5] An Example of a System to which an MA Remote Controller is connected..... 30 [6] An Example of a System to which an ME Remote Controller is connected.....
  • Page 27 - 18 - HWE15060...

  • Page 28: System Configuration

    [ II Restrictions ] II Restrictions [1] System configuration 1. Table of compatible indoor units <PQHY> The table below summarizes the types of indoor units that are compatible with different types of heat source units. Heat Composing units Maximum total capacity Maximum number Types of connectable in- source...
  • Page 29 [ II Restrictions ] 1. Table of compatible indoor units <PQRY> The table below summarizes the types of indoor units that are compatible with different types of heat source units. Heat Composing units Maximum total capacity Maximum number Types of connectable in- source of connectable indoor of connectable in-...

  • Page 30: Types And Maximum Allowable Length Of Cables

    [ II Restrictions ] [2] Types and Maximum allowable Length of Cables 1. Wiring work (1) Notes 1) Have all electrical work performed by an authorized electrician according to the local regulations and instructions in this man- ual. 2) Install external transmission cables at least 5cm [1-31/32"] away from the power supply cable to avoid noise interference. (Do not put the control cable and power supply cable in the same conduit tube.) 3) Provide grounding for the heat source unit as required.
  • Page 31 [ II Restrictions ] 1) M-NET transmission line Facility All facility types type Type Shielded cable CVVS, CPEVS, MVVS Cable type Number of 2-core cable cores Cable size Larger than 1.25mm [AWG16], or ø1.2mm or above Maximum transmission line distance between the 200 m [656ft] max.

  • Page 32: Switch Settings And Address Settings

    [ II Restrictions ] [3] Switch Settings and Address Settings 1. Switch setting Refer to section "[5] An Example of a System to which an MA Remote Controller is connected - [7] An Example of a System to which both MA Remote Controller and ME Remote Controller are connected" before performing wiring work. Set the switches while the power is turned off.
  • Page 33 [ II Restrictions ] 2. M-NET Address settings (1) Address settings table The need for address settings and the range of address setting depend on the configuration of the system. Unit or controller Sym- Address Setting method Factory setting address range setting CITY MULTI...
  • Page 34 [ II Restrictions ] (2) Power supply switch connector connection on the heat source unit (Factory setting: The male power supply switch connector is connected to CN41.) There are limitations on the total number of units that are connectable to each refrigerant system. Refer to the DATABOOK for details.
  • Page 35 [ II Restrictions ] (5) Various start-stop controls (Indoor unit settings) Each indoor unit (or group of indoor units) can be controlled individually by setting SW 1-9 and 1-10. *4 *5 Setting (SW1) Operation of the indoor unit when the operation is resumed after the unit Function was stopped Power ON/OFF by the...
  • Page 36 [ II Restrictions ] *3. Low-noise mode is valid when Dip SW6-8 on the heat source unit is set to OFF. When DIP SW6-8 is set to ON, 4 levels of on-DEMAND are possible, using different configurations of low-noise mode input and DEMAND input settings.When 2 or more heat source units exist in one refrigerant circuit system, 8 levels of on-DEMAND are possible.
  • Page 37 [ II Restrictions ] (8) Demand control 1) General outline of control Demand control is performed by using the external signal input to the 1-2 and 1-3 pins of CN3D on the heat source units (OC, OS1, and OS2). Between 2 and 12 steps of demand control is possible by setting DIP SW6-8 on the heat source units (OC, OS1, and OS2). Table.1 DipSW6-8 Demand control switch...

  • Page 38: Sample System Connection

    [ II Restrictions ] 8-step demand control (When SW6-8 is set to ON on two heat source units) Demand capacity is shown below. 8-step demand No.2 CN3D 1-2P Open Short-circuit No.1 CN3D 1-2P 1-3P Open Short-circuit Open Short-circuit Open Open 100% Short-circuit Short-circuit...

  • Page 39: An Example Of A System To Which An Ma Remote Controller Is Connected

    [ II Restrictions ] [5] An Example of a System to which an MA Remote Controller is connected 1. System with one heat source unit (automatic address setup for both indoor and heat source units) <PQHY> (1) Sample control wiring Interlock operation with the ventilation unit Leave the male...
  • Page 40 [ II Restrictions ] Set one of the MA remote controllers to sub. (Refer to (4) Wiring method MA remote controller function selection or the installation 1) Indoor-heat source transmission line manual for the MA remote controller for the setting meth- od.) Daisy-chain terminals M1 and M2 on the terminal block for indoor-heat source transmission line (TB3) on the...
  • Page 41 [ II Restrictions ] 2. An example of a system with one heat source unit to which 2 or more LOSSNAY units are connected (manual address setup for both indoor and heat source units) <PQHY> (1) Sample control wiring Interlock operation with the ventilation unit Leave the male Leave the male...
  • Page 42 [ II Restrictions ] 4) LOSSNAY connection (4) Wiring method Connect terminals M1 and M2 on the terminal block 1) Indoor-heat source transmission line (TB5) on the indoor unit (IC) to the appropriate terminals Same as [5] 1. on the terminal block (TB5) on LOSSNAY (LC). (Non-po- Shielded cable connection larized two-wire) Same as [5] 1.
  • Page 43 [ II Restrictions ] 3. Group operation of units in a system with multiple heat source units <PQHY> (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male Group Group Group from CN41 to CN40.
  • Page 44 [ II Restrictions ] whose power jumper was moved from CN41 to CN40, (4) Wiring method central control is not possible, even if TB7's are daisy- 1) Indoor-heat source transmission line chained.) Same as [5] 1. Only use shielded cables. Only use shielded cables.
  • Page 45 [ II Restrictions ] 4. A system in which a system controller is connected to the transmission line for centralized control and which is pow- ered from a heat source unit <PQHY> (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male...
  • Page 46 [ II Restrictions ] was moved from CN41 to CN40, central control is not pos- (4) Wiring method sible, even if TB7's are daisychained.) 1) Indoor-heat source transmission line Only use shielded cables. Shielded cable connection Same as [5] 1. Daisy-chain the S terminal on the terminal block (TB7) on Only use shielded cables.
  • Page 47 [ II Restrictions ] 5. An example of a system in which a system controller is connected to the indoor-heat source transmission line (ex- cept LM adapter) <PQHY> (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male from CN41 to CN40.
  • Page 48 [ II Restrictions ] line for the central control system to TB7 of the OC. (Note (4) Wiring method a).To maintain the central control even during an OC fail- 1) Indoor-heat source transmission line ure or a power failure, connect TB7 on OC and OS to- gether.
  • Page 49 [ II Restrictions ] 6. System with one heat source unit (automatic address setup for both indoor and heat source units) <PQRY> (1) Sample control wiring Interlock operation with the ventilation unit Leave the male Leave the male Group Group connector on connector on CN41 as it is.
  • Page 50 [ II Restrictions ] remote controllers. (4) Wiring method Set one of the MA remote controllers as a sub controller. 1) Indoor-heat source transmission line (Refer to the Instruction Manual for the MA remote con- Daisy-chain terminals M1 and M2 of the terminal block troller for the setting method.) for indoor-heat source transmission line (TB3) on the Group operation of indoor units...
  • Page 51 [ II Restrictions ] 7. An example of a system with one heat source unit to which 2 or more LOSSNAY units are connected (manual address setup for both indoor and heat source units) <PQRY> (1) Sample control wiring Interlock operation with the ventilation unit Leave the male Leave the male Group...
  • Page 52 [ II Restrictions ] 2) Transmission line for centralized control (4) Wiring method No connection is required. 1) Indoor-heat source transmission line Daisy-chain terminals M1 and M2 of the terminal block 3) MA remote controller wiring for indoor-heat source transmission line (TB3) on the Same as [5] 6.
  • Page 53 [ II Restrictions ] 8. Group operation of units in a system with multiple heat source units <PQRY> (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male from CN41 to CN40. Group Group Group connector on...
  • Page 54 [ II Restrictions ] power failure, connect TB7 on OC and OS together. (If there (4) Wiring method is a problem with the heat source unit whose power jumper 1) Indoor-heat source transmission line was moved from CN41 to CN40, central control is not pos- sible, even if TB7's are daisychained.) Same as [5] 7.
  • Page 55 [ II Restrictions ] 9. A system in which a system controller is connected to the transmission line for centralized control and which is pow- ered from a heat source unit <PQRY> (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male from CN41 to CN40.
  • Page 56 [ II Restrictions ] heat source unit whose power jumper was moved from CN41 to (4) Wiring method CN40, central control is not possible, even if TB7's are daisy- chained.) 1) Indoor-heat source transmission line Only use shielded cables. Same as [5] 7. Shielded cable connection Only use shielded cables.
  • Page 57 [ II Restrictions ] 10. An example of a system in which a system controller is connected to the indoor-heat source transmission line (ex- cept LM adapter) <PQRY> (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector . from CN41 to CN40.
  • Page 58 [ II Restrictions ] sy-chained, connect the transmission line for the central control system (4) Wiring method to TB7 of the OC. (Note a).To maintain the central control even during an OC failure or a power failure, connect TB7 on OC and OS together. (If 1) Indoor-heat source transmission line there is a problem with the heat source unit whose power jumper was moved from CN41 to CN40, central control is not possible, even if TB7's...
  • Page 59 [ II Restrictions ] 11. A system with multiple BC controller connections (with a system controller connected to the centralized control line) <PQRY> (1) Sample control wiring Leave the male Move the male connector connector on from CN41 to CN40 CN41 as it is.
  • Page 60 [ II Restrictions ] daisy-chained, connect the transmission line for the central control sys- (4) Wiring method tem to TB7 of the OC. (Note a).To maintain the central control even dur- ing an OC failure or a power failure, connect TB7 on OC and OS together. Indoor-heat source transmission line (If there is a problem with the heat source unit whose power jumper was moved from CN41 to CN40, central control is not possible, even if TB7's...

  • Page 61: An Example Of A System To Which An Me Remote Controller Is Connected

    [ II Restrictions ] [6] An Example of a System to which an ME Remote Controller is connected 1. A system in which a system controller is connected to the centralized control transmission line <PQHY> (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male...
  • Page 62 [ II Restrictions ] When 2 remote controllers are connected to the sys- (4) Wiring method 1) Indoor-heat source transmission line Refer to the section on Switch Setting. Same as [5] 1. Performing a group operation (including the group Shielded cable connection operation of units in different refrigerant circuits).
  • Page 63 [ II Restrictions ] 2. A system in which a system controller is connected to the centralized control transmission line <PQRY> (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male from CN41 to CN40. connector on SW5-1 OFF ON CN41 as it is.
  • Page 64 [ II Restrictions ] When 2 remote controllers are connected to the sys- (4) Wiring method 1) Indoor-heat source transmission line Refer to the section on Switch Setting. Same as [5] 8. Performing a group operation (including the group Shielded cable connection operation of units in different refrigerant circuits).

  • Page 65: An Example Of A System To Which Both Ma Remote Controller And Me Remote Controller Are Connected

    [ II Restrictions ] [7] An Example of a System to which both MA Remote Controller and ME Remote Controller are connected 1. PQHY (1) Sample control wiring Leave the male Leave the male Move the male connector connector on connector on Group from CN41 to CN40.
  • Page 66 [ II Restrictions ] Same as [5] 1. (4) Wiring method Group operation of indoor units 1) Indoor-heat source transmission line Same as [5] 1. Same as [5] 1. 4) ME remote controller wiring Shielded cable connection Same as [6] Same as [5] 1.
  • Page 67 [ II Restrictions ] 2. PQRY (1) Sample control wiring Move the male connector Leave the male from CN41 to CN40. Group Group connector on SW5-1 OFF ON CN41 as it is. SW5-1 OFF ON TB15 TB15 TB15 TB02 M1M2 M1M2 M1M2 M1M2...
  • Page 68 [ II Restrictions ] Group operation of indoor units (4) Wiring method Same as [5] 6. 1) Indoor-heat source transmission line 4) ME remote controller wiring Same as [5] 8. When 2 remote controllers are connected to the sys- Shielded cable connection Same as [5] 6.

  • Page 69: The Unit

    [ II Restrictions ] (5) Address setting method Pro- Facto- dress Unit or controller Setting method Notes ry set- dure setting ting range Opera- Main 01 to Assign the smallest address to the Assign an address smaller than that of main unit in the group.

  • Page 70: Restrictions On Pipe Length

    [ II Restrictions ] [8] Restrictions on Pipe Length (1) End branching <PQHY> P200 - P600 models Heat source unit Branch header First branch (Twinning kit) Indoor Indoor Indoor Twinning kit Indoor Indoor Indoor Unit: m [ft] Allowable length of Operation Pipe sections pipes...
  • Page 71 [ II Restrictions ] P400 - P900 models Provide a trap on the pipe (gas pipe only) within 2 m from the Note1 Install the pipe that connects the branch pipe and the heat source units joint pipe if the total length of the pipe that connects the joint in the way that it has a downward inclination toward the branch pipe.
  • Page 72 [ II Restrictions ] 1. Refrigerant pipe size <PQHY> (1) Diameter of the refrigerant pipe between the heat source unit and the first branch (heat source unit pipe size) Heat source unit set Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch] name P200 model ø9.52 [3/8"]...
  • Page 73 [ II Restrictions ] (5) Size of the refrigerant pipe between the first distributor or the second distributor and heat source units Heat source unit Composing unit models Liquid pipe (mm) [inch] Gas pipe (mm) [inch] model P400 P200 ø9.52 [3/8"] ø19.05 [3/4"] P200 P450...
  • Page 74 [ II Restrictions ] (1) System that requires 16 BC controller ports or fewer <System with only the main BC controller or standard BC con- troller> <PQRY> Heat source unit *Use a main BC controller when connecting the heat source units of P400 model or above.
  • Page 75 [ II Restrictions ] Restrictions on pipe length The height difference and the pipe length between BC controller and indoor units [PQRY-P200, P250, P300YLM-A] 1000 [229] [3280] [2952] [196] [2624] [164] [2296] [131] [1968] [98] [1640] [64] [1312] [32] [984] [656] 90 100 110 [32] [64] [98] [131] [164] [196] [229] [262] [295] [328] [360]...
  • Page 76 [ II Restrictions ] (2) System that requires more than 16 BC controller ports or with multiple BC controllers <Heat source unit P600 model or below> Heat source unit Branch joint Indoor (CMY-Y202-G2) (CMY-Y102L-G2) (CMY-Y102S-G2) BC controller (sub) BC controller (main) Branch joint (CMY-Y102S-G2) BC controller (sub)
  • Page 77 [ II Restrictions ] 1) A system that requires more than 16 BC controller ports requires two or three BC controllers (main and sub), and three pipes will be used between the main and the sub BC controllers. 2) When connecting two sub BC controllers, observe the maximum allowable length in the table above. 3) When connecting two sub BC controllers, install them in parallel.
  • Page 78 [ II Restrictions ] (3) System that requires more than 16 BC controller ports or with multiple BC controllers <Heat source unit P400 model or above> Heat source unit Heat source unit Heat source unit Twinning kit CMY-Q100CBK2 : P400-P600YSLM CMY-Q200CBK : P700-P900YSLM On the low-pressure side, the twinning kit connects to the pipes on site inside the heat source unit.
  • Page 79 [ II Restrictions ] 1) A system that requires more than 16 BC controller ports requires two or three BC controllers (main and sub), and three pipes will be used between the main and the sub BC controllers. 2) When connecting two sub BC controllers, observe the maximum allowable length in the table above. 3) When connecting two sub BC controllers, install them in parallel.
  • Page 80 [ II Restrictions ] (4) Hybrid City Multi system CMB-WP108V-GA1 + CMB-WP108V-GB1 (CMB-WP1016V-GA1) (CMB-WP1016V-GB1) Notes: *1 Indoor units that are connected to the same branch joint cannot be si- multaneously operated in different operation modes. (Unit: m) Item Piping portion Allowable value Between heat source unit and 110 or less...
  • Page 81 [ II Restrictions ] Restrictions on pipe length Heating capacity correction [PQRY-P200, P250, P300YLM-A] [PQRY-P200, P250, P300YLM-A] 1000 [3280] 0.99 [2952] 0.98 [2624] 0.97 [2296] 0.96 0.95 [1968] 0.94 [1640] 0.93 [1312] 0.92 [984] 0.91 [656] 90 100 110 [32] [64] [98] [131] [164] [196] [229] [262] [295] [328] [360] Water piping equivalent length to farthest indoor unit (m) Pipe length between heat source unit and HBC controller (m[ft]) Restrictions on pipe length...
  • Page 82 [ II Restrictions ] 2. Refrigerant pipe size <PQRY> (1) Between heat source unit and the first twinning pipe (Part A) Unit : mm [inch] Refrigerant pipe size Heat source unit High-pressure pipe Low-pressure pipe P200 ø15.88 [5/8"] ø19.05 [3/4"] P250 ø19.05 [3/4"] ø22.2 [7/8"]...
  • Page 83 [ II Restrictions ] 3. Connecting the BC controller <PQRY> (1) Size of the pipe that fits the standard BC controller ports P200 - P300 models Connection: Brazed connection To heat source unit BC controller Note 1 Note 2 Reducer Branch joint (Model name:CMY-Y102S-G2) Junction pipe kit (Standard...
  • Page 84 [ II Restrictions ] Be sure to have pipe expansion of indoor unit connecting port by cutting the piping at the cutting point which depends on the indoor unit capacity. Indoor unit connecting port Cutting point : ø9.52 (Liquid side) or ø15.88 (Gas side) (Indoor unit model : bigger than P50) Cutting point : ø6.35 (Liquid side) or ø12.7 (Gas side) (Indoor unit model : P50 or smaller)
  • Page 85 [ II Restrictions ] (2) Size of the pipe that fits the main BC controller ports P200 - P900 models To heat Branch joint (Model name:CMY-Y102S-G2) Connection: Brazed connection (Optional accessory) source unit BC controller (main) Note 1 Reducer (Standard supplied parts) Note 2 Junction pipe kit (Model name:...
  • Page 86 [ II Restrictions ] Unit : mm [inch] Pipe sections Model High pressure side (Liquid) Low-pressure side (Gas) Heat source unit side P200 ø15.88 [5/8"] ø19.05 [3/4"] (Brazed connection) (Brazed connection) P250 ø19.05 [3/4"] ø22.2 [7/8"] (Brazed connection)s (Brazed connection) P300 P350 P400...
  • Page 87 [ II Restrictions ] (3) Size of the pipe that fits the sub BC controller ports Branch joint (Model name:CMY-Y102S-G2) (Optional accessory) Connection: Brazed connection Note 2 To Main BC controller Junction pipe kit BC controller (sub) (Model name: CMY-R160-J1) Note 1 (Optional accessory) Reducer...

  • Page 88: Heat Source Unit Components

    III Heat source Unit Components [1] Heat source Unit Components and Refrigerant Circuit............ 81 [2] Control Box of the Heat source Unit ................89 [3] Heat source Unit Circuit Board ..................91 [4] BC Controller Components ....................96 [5] Control Box of the BC Controller..................99 [6] BC Controller Circuit Board....................
  • Page 89 - 80 - HWE15060...

  • Page 90: Heat Source Unit Components And Refrigerant Circuit

    [ III Heat source Unit Components ] III Heat source Unit Components [1] Heat source Unit Components and Refrigerant Circuit 1. Front view of a heat source unit (1) PQHY-P200, 250, 300YLM-A, PQRY-P200, 250, 300YLM-A Top panel Control box Front panel I/O box - 81 - HWE15060...
  • Page 91 [ III Heat source Unit Components ] (2) PQHY-P350, 400, 450, 500, 550, 600YLM-A, PQRY-P350, 400, 450, 500, 550, 600YLM-A Top panel Control box I/O box Front panels - 82 - HWE15060...

  • Page 92: Refrigerant Circuit

    [ III Heat source Unit Components ] 2. Refrigerant circuit (1) PQHY-P200, 250, 300YLM-A LEV6 Solenoid valve (SV7b) Low-pressure sensor (63LS) Component cooler heat exchanger 4-way valve(21S4a) Check valve (CV1a) Double pipe(SCC) Solenoid valve block (SV4a, SV4b, SV4d) High-pressure switch(63H1) High-pressure sensor(63HS1) LEV1 LEVINV...
  • Page 93 [ III Heat source Unit Components ] (2) PQRY-P200, 250, 300YLM-A Component cooler heat exchanger LEV6 Check valve (CV5a) Low-pressure sensor (63LS) 4-way valve(21S4a) Solenoid valve (SV7b) LEVINV Solenoid valve block High-pressure switch(63H1) (SV4a, SV4b, SV4d) High-pressure sensor(63HS1) Solenoid valve(SV7a) Solenoid valve (SV1a) Check valve (CV3a)
  • Page 94 [ III Heat source Unit Components ] (3) PQHY-P350, 400, 450, 500YLM-A Component cooler LEVINV heat exchanger 4-way valve(21S4b) 4-way valve(21S4a) Double pipe(SCC) LEV6 Water heat exchanger LEV1 Solenoid valve(SV7b) Check valve (CV1) Solenoid valve block (SV4a, SV4b, SV4d) Check valve (CV2) Solenoid valve (SV7a)
  • Page 95 [ III Heat source Unit Components ] (4) PQRY-P350, 400, 450, 500YLM-A Check valve (CV6a) Component cooler heat exchanger Check valve (CV3a) LEVINV LEV6 4-way valve(21S4b) Check valve (CV5a) 4-way valve(21S4a) Solenoid valve(SV9) Water heat exchanger Solenoid valve(SV7b) Check valve (CV2b) Solenoid valve block (SV4a, SV4b, SV4d) Low-pressure sensor (63LS)
  • Page 96 [ III Heat source Unit Components ] (5) PQHY-P550, 600YLM-A Component cooler heat exchanger LEVINV 4-way valve(21S4b) 4-way valve(21S4a) Double pipe(SCC) Water heat exchanger LEV6 LEV1 Check valve (CV1) Solenoid valve (SV7b) Check valve (CV2) Solenoid valve block (SV4a, SV4b, SV4d) Solenoid valve (SV7a) Low-pressure sensor...
  • Page 97 [ III Heat source Unit Components ] (6) PQRY-P550, 600YLM-A Check valve (CV6a) Component cooler heat exchanger LEVINV Check valve (CV3a) LEV6 4-way valve(21S4b) Check valve (CV5a) 4-way valve(21S4a) Solenoid valve(SV9) Water heat exchanger Solenoid valve(SV7b) Check valve (CV2b) Solenoid valve block (SV4a, SV4b, SV4d) Low-pressure sensor (63LS) Solenoid valve(SV7a)

  • Page 98: Control Box Of The Heat Source Unit

    [ III Heat source Unit Components ] [2] Control Box of the Heat source Unit 1. Control Box <HIGH VOLTAGE WARNING> Control box houses high-voltage parts. When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components.
  • Page 99 [ III Heat source Unit Components ] 2. I/O Box I/O board - 90 - HWE15060...

  • Page 100: Heat Source Unit Circuit Board

    [ III Heat source Unit Components ] [3] Heat source Unit Circuit Board 1. Heat source unit control board CN61 17 VDC Serial communication 17 VDC signal input CN801 Serial communication (Inverter board) 5 VDC Pressure switch connection CNDC Bus voltage input Actuator drive signal output drive signal output...
  • Page 101 [ III Heat source Unit Components ] 2. M-NET board CNIT CNS2 CN102 Input 12VDC Transmission line Power supply output for centralized input/output for control system (30VDC) Input 5VDC centralized control CN04 Indoor-heat source transmission line Power supply system (30VDC) Bus voltage input input/output (30VDC) detection output...
  • Page 102 [ III Heat source Unit Components ] 3. INV board CN5V 5VDC output 1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.
  • Page 103 [ III Heat source Unit Components ] 4. I/O board CNPW Pump interlock signal output Pump interlock signal output CNOUT2 12 VDC input Operation ON signal input (X25) CNAC4 Operation ON signal output Power Input (24 VAC or 24 VDC) (non-polar) L1 phase Operation ON signal output L2 phase...

  • Page 104: Noise Filter

    [ III Heat source Unit Components ] 5. Noise Filter Output Output (Rectified L2-N current) (Rectified L2-N current) Surge absorber circuit Surge absorber circuit Short circuit Short circuit Grounding F1,F2,F3,F4 Fuse 250VAC 6.3A Grounding Output CN1A Input CN1B TB21 TB22 TB23 TB24 Input...

  • Page 105: Bc Controller Components

    [ III Heat source Unit Components ] [4] BC Controller Components 1. CMB-P V-G1, GA1, HA1 (1) Front Liquid pipe (Indoor unit side) Gas pipe (Indoor unit side) (2) Rear view <G1 type> TH11 SVM1 LEV3 LEV1 Gas/Liquid separator TH16 Tube in tube heat exchanger TH12 TH15...
  • Page 106 [ III Heat source Unit Components ] (3) Rear view <GA1 type> TH16 LEV2 LEV3 TH11 LEV1 SVM2 Gas/Liquid separator Tube in tube heat exchanger SVM1 TH12 TH15 (4) Rear view <HA1 type> Gas/Liquid separator LEV3 LEV1 SVM2 SVM2b SVM1b SVM1 TH16 TH15...
  • Page 107 [ III Heat source Unit Components ] 2. CMB-P V-GB1, HB1 (1) Front Liquid pipe (Indoor unit side) Gas pipe (Indoor unit side) (2) Rear view TH12 LEV3 TH15 Refer to the Service Handbook that came with CMB-WP**V-GA(B)1 for information about the Hybrid City Multi system. - 98 - HWE15060...

  • Page 108: Control Box Of The Bc Controller

    [ III Heat source Unit Components ] [5] Control Box of the BC Controller 1. CMB-P1016V-G1, GA1, HA1 Transformer Terminal block for power supply Terminal block for transmission line Relay board BC board Refer to the Service Handbook that came with CMB-WP**V-GA(B)1 for information about the Hybrid City Multi system. - 99 - HWE15060...

  • Page 109: Bc Controller Circuit Board

    [ III Heat source Unit Components ] [6] BC Controller Circuit Board 1. BC controller circuit board (BC board) CNTR 200-240 VAC output CNOUT1,CNOUT3 L2 phase Relay board control signal output L1 phase Actuator drive signal output (200-240 VAC) CN38 200-240 VAC output L1 phase L2 phase...
  • Page 110 [ III Heat source Unit Components ] 2. RELAY BOARD (RELAY 4 board) CN39 200-240 VAC input Actuator drive signal output (200-240 VAC) L1 phase L2 phase Relay board control signal input 3. RELAY BOARD (RELAY 10 board) CN39 200-240 VAC input L1 phase L2 phase Actuator drive signal output (200-240 VAC)
  • Page 111 [ III Heat source Unit Components ] - 102 - HWE15060...

  • Page 112: Remote Controller

    IV Remote Controller [1] Functions and Specifications of MA and ME Remote Controllers ......... 105 [2] Group Settings and Interlock Settings via the ME Remote Controller ......106 [3] Interlock Settings via the MA Remote Controller ............110 [4] Using the built-in Temperature Sensor on the Remote Controller ......... 116 - 103 - HWE15060...
  • Page 113 - 104 - HWE15060...

  • Page 114: Functions And Specifications Of Ma And Me Remote Controllers

    [ IV Remote Controller ] IV Remote Controller [1] Functions and Specifications of MA and ME Remote Controllers There are two types of remote controllers: ME remote controller, which is connected on the indoor-heat source transmis- sion line, and MA remote controller, which is connected to each indoor unit. 1.

  • Page 115: Group Settings And Interlock Settings Via The Me Remote Controller

    [ IV Remote Controller ] [2] Group Settings and Interlock Settings via the ME Remote Controller 1. Group settings/interlock settings Make the following settings to perform a group operation of units that are connected to different heat source units or to manually set up the indoor/heat source unit address.
  • Page 116 [ IV Remote Controller ] Repeat steps in the previous page to interlock all the indoor units in a group with the LOSSNAY unit. (C) To return to the normal display When all the group settings and interlock settings are made, take the To go back to the normal display, To search for an address, follow step...
  • Page 117 [ IV Remote Controller ] (A) To delete group settings (B) To delete interlock settings <Successful completion of deletion> If deletion is successfully completed, will appear in the unit type display window. If the deletion fails, will (Displayed alternately) will be displayed in the room temperature display window. appear in the unit type display - If a transmission error occurs, the selected setting will not be window.
  • Page 118 [ IV Remote Controller ] [Operation Procedures] 1. Press the [ON/OFF] button on the remote controller to bring the unit to a stop. The display will appear as shown in the previous page (Normal display). 2. Press buttons [CHECK] and [ ] simultaneously for 2 seconds to go into the Skip - Auto - Mode setting under the remote controller function selection mode.

  • Page 119: Interlock Settings Via The Ma Remote Controller

    [ IV Remote Controller ] [3] Interlock Settings via the MA Remote Controller 1. LOSSNAY interlock setting (Make this setting only when necessary.) (1) MA Remote controller (PAR-31MAA) This setting is required only when the operation of City Multi units is interlocked with LOSSNAY units. This setting is not available for the Mr.
  • Page 120 [ IV Remote Controller ] (2) MA Remote controller (PAR-21MAA) * When the upper controller is connected, make the setting using the upper controller. NOTE: When using LOSSNAY units in conjunction, interlock the addresses of all indoor units within the group and address of LOSSNAY units. Perform this operation to enter the interlock setting between the LOSSNAY and the indoor units to which the remote controller is connected, or to search and delete registered information.
  • Page 121 [ IV Remote Controller ] 2. Search Procedures > To search for the LOSSNAY unit that is interlocked with a particular indoor unit, enter the address of the indoor unit into the remote controller that is connected to it. <Indoor unit address> Press the [ MENU] button to search for the address of the LOSSNAY unit that is interlocked with the selected indoor unit.
  • Page 122 [ IV Remote Controller ] (3) MA Simple Remote controller Make this setting only when interlocked operation with LOSSNAY is necessary with CITY MULTI models. Perform this operation when you want to register the LOSSNAY, confirm the registered units, or delete the registered units controlled by the remote controller. The following uses indoor unit address 05 and LOSSNAY address 30 as an example to describe the setting procedure.
  • Page 123 [ IV Remote Controller ] <1. Registration procedure> Set the address of the indoor unit to be interlocked with the LOSSNAY unit using the buttons. (01 to 50) After setting, press the button and set the Lossnay address you want to register by operating the buttons.
  • Page 124 [ IV Remote Controller ] <2. Confirmation procedure> Set the address of the indoor unit connected by the remote controller whose LOSSNAY you want to confirm using the buttons. (01 to 50) Press the button and button simultaneously for 2 seconds, and check the LOSSNAY address registered at the set indoor unit address.

  • Page 125: Using The Built-In Temperature Sensor On The Remote Controller

    [ IV Remote Controller ] [4] Using the built-in Temperature Sensor on the Remote Controller 1. Selecting the position of temperature detection (Factory setting: SW1-1 on the controller board on the indoor unit is set to OFF.) To use the built-in sensor on the remote controller, set the SW1-1 on the controller board on the indoor unit to ON. Some models of remote controllers are not equipped with a built-in temperature sensor.

  • Page 126: Electrical Wiring Diagram

    V Electrical Wiring Diagram [1] Electrical Wiring Diagram of the Heat source Unit............119 [2] Electrical Wiring Diagram of the BC Controller .............. 120 [3] Electrical Wiring Diagram of Transmission Booster............130 - 117 - HWE15060...
  • Page 127 - 118 - HWE15060...

  • Page 128: Electrical Wiring Diagram Of The Heat Source Unit

    [ V Electrical Wiring Diagram ] V Electrical Wiring Diagram [1] Electrical Wiring Diagram of the Heat source Unit - 119 - HWE15060...

  • Page 129: Electrical Wiring Diagram Of The Bc Controller

    [ V Electrical Wiring Diagram ] [2] Electrical Wiring Diagram of the BC Controller (1) CMB-P104V-G1 model - 120 - HWE15060...
  • Page 130 [ V Electrical Wiring Diagram ] (2) CMB-P105,106V-G1 models - 121 - HWE15060...
  • Page 131 [ V Electrical Wiring Diagram ] (3) CMB-P108,1010V-G1 models - 122 - HWE15060...
  • Page 132 [ V Electrical Wiring Diagram ] (4) CMB-P1013,1016V-G1 models - 123 - HWE15060...
  • Page 133 [ V Electrical Wiring Diagram ] (5) CMB-P108,1010V-GA1 models - 124 - HWE15060...
  • Page 134 [ V Electrical Wiring Diagram ] (6) CMB-P1013,1016V-GA1 models - 125 - HWE15060...
  • Page 135 [ V Electrical Wiring Diagram ] (7) CMB-P104V-GB1 model - 126 - HWE15060...
  • Page 136 [ V Electrical Wiring Diagram ] (8) CMB-P108V-GB1 model - 127 - HWE15060...
  • Page 137 [ V Electrical Wiring Diagram ] (9) CMB-P1016V-HA1 model - 128 - HWE15060...
  • Page 138 [ V Electrical Wiring Diagram ] (10) CMB-P1016V-HB1 model Refer to the Service Handbook that came with CMB-WP**V-GA(B)1 for information about the Hybrid City Multi system. - 129 - HWE15060...

  • Page 139: Electrical Wiring Diagram Of Transmission Booster

    [ V Electrical Wiring Diagram ] [3] Electrical Wiring Diagram of Transmission Booster Terminal block for power supply (TB1) 250V 5A Red Red Red Black White White Green/Yellow 220 - 240VAC Varistor Noise filter Black White White White White Varistor Green Black Stabilized power supply...

  • Page 140: Refrigerant Circuit

    VI Refrigerant Circuit [1] Refrigerant Circuit Diagram ................... 133 [2] Principal Parts and Functions ..................139 - 131 - HWE15060...
  • Page 141 - 132 - HWE15060...

  • Page 142: Refrigerant Circuit Diagram

    [ VI Refrigerant Circuit ] VI Refrigerant Circuit [1] Refrigerant Circuit Diagram 1. Heat source unit (1) PQHY-P200, P250, P300 models 21S4a Solenoid valve block SV4a SV4b SV4d ST17 SV7a SV7b Water heat exchanger 63HS1 (plate type) 63H1 THINV LEVINV Water circuit INV-HEX SV1a...
  • Page 143 [ VI Refrigerant Circuit ] (3) PQHY-P350, P400, P450, P500 models 21S4a Solenoid valve block 21S4b SV4a SV4b SV4d ST17 SV7a SV7b Water heat exchanger 63HS1 (plate type) 63H1 Water circuit THINV LEVINV SV7c INV-HEX SV1a LEV7 63LS Comp LEV1 LEV6 (4) PQRY-P350, P400, P450, P500 models 21S4a...
  • Page 144 [ VI Refrigerant Circuit ] (5) PQHY-P550, P600 models 21S4a Solenoid valve block 21S4b SV4a SV4d SV4b ST17 SV7a SV7b Water heat exchanger 63HS1 (plate type) 63H1 Water circuit THINV LEVINV SV7c INV-HEX SV1a LEV7 63LS Comp LEV1 LEV6 (6) PQRY-P550, P600 models 21S4a Solenoid valve block 21S4b...
  • Page 145 [ VI Refrigerant Circuit ] 2. BC controller (1) CMB-P104 - P1016V-G1 SVC/SVA/SVB Solenoid valve block TH15 Gas/Liquid separator LEV3 TH12 HIC-B TH11 LEV1 TH16 HIC-A Check valve block SVM1 - 136 - HWE15060...
  • Page 146 [ VI Refrigerant Circuit ] (2) CMB-P108, P1010, P1013, P1016V-GA1 (main) SVC/SVA/SVB Solenoid valve block TH15 Gas/Liquid separator LEV3 SVM2 TH12 HIC-B TH11 LEV1 TH16 HIC-A Check valve block LEV2 SVM1 (3) CMB-P104, P108V-GB1 (sub) SVC/SVA/SVB Solenoid valve block TH12 TH15 LEV3 HIC-C...
  • Page 147 [ VI Refrigerant Circuit ] (4) CMB-P1016V-HA1 (main) SVA,SVB,SVC TH15 Gas/Liquid SVM2 separator LEV3 SVM2b TH12 HIC-B TH11 LEV1 TH16 HIC-A SVM1 SVM1b (5) CMB-P1016V-HB1 (sub) SVC/SVA/SVB Solenoid valve block TH12 TH15 LEV3 HIC-C Check valve block Refer to the Service Handbook that came with CMB-WP**V-GA(B)1 for information about the Hybrid City Multi system. - 138 - HWE15060...

  • Page 148: Principal Parts And Functions

    [ VI Refrigerant Circuit ] [2] Principal Parts and Functions 1. Heat source unit Part Symbols Notes Usage Specifications Check method name (functions) Com- Adjusts the amount of circulating P200-P300 models pressor (Comp1) refrigerant by adjusting the oper- Low-pressure shell scroll ating frequency based on the op- compressor erating pressure data...
  • Page 149 [ VI Refrigerant Circuit ] Part Symbols Notes Usage Specifications Check method name (functions) Thermis- PQHY LEV1 is controlled based on the Degrees Celsius Resistance only TH2, TH3, and TH6 values check = 15k = 3460 0/80 PQHY Controls defrosting during heat- R = 15 3460 (Pipe...
  • Page 150 [ VI Refrigerant Circuit ] Part Symbols Notes Usage Specifications Check method name (functions) Sole- SV1a 1) High/low pressure bypass at AC220 - 240V Continuity check noid Discharge-suc- Open while being powered/ with a tester start-up and stopping, and valve tion closed while not being pow- capacity control during low-...
  • Page 151 [ VI Refrigerant Circuit ] 2. Indoor Unit Part Symbol Notes Usage Specification Check method Name (functions) Linear 1) Adjusts superheat at the DC12V Refer to the section expan- Opening of stepping motor "Continuity Test with a indoor heat exchanger sion valve driving valve 0-(1400) puls- Tester".
  • Page 152 [ VI Refrigerant Circuit ] 3. BC controller (1) G type Symbols Part Part name Usage Specifications Check method (functions) code Pressure 1) Detects high pressure Pressure sensor (High pres- 2) LEV control 0~4.15 MPa [601psi] Vout 0.5~3.5V sure side) 1 2 3 0.071V/0.098 MPa [14psi] Pressure [MPa]...
  • Page 153 [ VI Refrigerant Circuit ] (2) GA type Symbols Part Part name Usage Specifications Check method (functions) code Pressure 1) Detects high pressure Pressure sensor (High pres- 2) LEV control 0~4.15 MPa [601psi] Vout 0.5~3.5V sure side) 1 2 3 0.071V/0.098 MPa [14psi] Pressure [MPa] Con-...
  • Page 154 [ VI Refrigerant Circuit ] (3) GB type Symbols Part Part name Usage Specifications Check method (functions) code Thermistor TH12 LEV control (Superheat) (Bypass = 15k outlet tem- = 3460 0/80 perature) R = 15 3460 TH15 LEV control (Superheat) 0°C[32°F] : 15kohm (Bypass in- 10°C[50°F] :9.7kohm...
  • Page 155 [ VI Refrigerant Circuit ] (4) HA type Symbols Part Part name Usage Specifications Check method (functions) code Pressure 1) Detects high pressure Pressure sensor (High pres- 2) LEV control 0~4.15 MPa [601psi] Vout 0.5~3.5V sure side) 1 2 3 0.071V/0.098 MPa [14psi] Pressure [MPa] Con-...
  • Page 156 [ VI Refrigerant Circuit ] (5) HB type Symbols Part Part name Usage Specifications Check method (functions) code Thermistor TH12 LEV control (Superheat) (Bypass = 15k outlet tem- = 3460 0/80 perature) R = 15 3460 TH15 LEV control (Superheat) 0°C[32°F] : 15kohm (Bypass in- 10°C[50°F] :9.7kohm...
  • Page 157 [ VI Refrigerant Circuit ] - 148 - HWE15060...

  • Page 158: Control

    VII Control [1] Functions and Factory Settings of the Dipswitches ............151 [2] Controlling the Heat source Unit ..................157 [3] Controlling BC Controller ....................174 [4] Operation Flow Chart..................... 175 - 149 - HWE15060...
  • Page 159 - 150 - HWE15060...

  • Page 160: Functions And Factory Settings Of The Dipswitches

    [ VII Control ] VII Control [1] Functions and Factory Settings of the Dipswitches 1. Heat source unit (1) Control board Function according to switch setting Units that require Switch Function Switch setting timing switch setting (Note 2) Unit address set- Set to 00 or 51-100 with the dial switch Before power on ting...
  • Page 161 [ VII Control ] Function according to Units that switch setting require Switch Function Switch setting timing switch setting (LED3 Unlit) (LED3 Lit) (Note 2) Refer to the LED monitor display Self-diagnosis/opera- SW6-10: 1-10 on the heat source unit heat Anytime after power on tion monitor source unit board.
  • Page 162 [ VII Control ] (2) INV board Functions are switched with the following connector. Function according to connec- Setting timing Connector Function Enabled Disabled Enabled Disabled CN6 short- Enabling/disabling the following error Error detec- Error detec- Anytime after power on circuit con- detection functions;...
  • Page 163 [ VII Control ] 2. Function of the switch (Indoor unit) (1) Dipswitches 1) SW1,3 Function according to switch setting Switch setting timing Switch Function Notes Set to ON (built-in sensor on the remote controller) Room temperature Built-in sensor on Indoor unit inlet on All Fresh (PEFY-VMH-F) model units detection position...
  • Page 164 [ VII Control ] (2) Address switch Actual indoor unit address setting varies in different systems. Refer to the installation manual for the heat source unit for details on how to make the address setting. Each address is set with a combination of the settings for the 10's digit and 1's digit. (Example) When setting the address to "3", set the 1's digit to 3, and the 10's digit to 0.
  • Page 165 [ VII Control ] (2) ME remote controller (PAR-F27MEA) Set the address of the remote controller with the rotary switch. Rotary switch 10's digit 1's digit (left) (right) Remote controller unit Example: In case of address 108 Address setting range Setting method Main remote controller 101-150...

  • Page 166: Controlling The Heat Source Unit

    [ VII Control ] [2] Controlling the Heat source Unit -1- Outline of Control Method The heat source units are designated as OC and OS in the order of capacity from large to small (if two or more units have the same capacity, in the order of address from small to large).
  • Page 167 [ VII Control ] -5- Bypass Control Bypass solenoid valves, which bypass the high- and low- pressure sides, perform the following functions. (1) Bypass solenoid valve (SV1a) (ON = Open) SV1a Operation When the compressor on each heat source ON for 4 minutes. unit starts up After the restoration of thermo or 3 minutes ON for 4 minutes.
  • Page 168 [ VII Control ] -6- Compressor Frequency Control Depending on the capacity required, the frequency of the compressor is controlled to keep constant evaporation temperature (0°C [32°F] = 0.71 MPa [103 psi]) during cooling operation, and condensing temperature (49°C [120°F] = 2.88 MPa [418 psi]) during heating operation.
  • Page 169 [ VII Control ] -7- Refrigerant Recovery Control <PQHY> Recovery of refrigerant is performed during heating operation to prevent the refrigerant from accumulating inside the unit while it is stopped (unit in fan mode), or inside the indoor unit that is in cooling mode or in heating mode with thermo off. It is also performed during cooling operation to prevent an excessive amount of refrigerant from accumulating in the heat source heat exchanger.
  • Page 170 [ VII Control ] (2) Heat source unit heat exchanger capacity control patterns Operation mode Solenoid valve Operation Model pattern PQRY PQHY SV4a SV4b SV4d SV7a SV7b LEV6 LEV7 P200- Cooling- 41 pulses 41-3000 pulses P300 only models Cooling- main Cooling- Cooling only...
  • Page 171 [ VII Control ] Operation mode Solenoid valve Operation Model pattern PQRY PQHY SV4a SV4b SV4d SV7a SV7b LEV6 LEV7 P350- Cooling- 41 pulses 41-3000 pulses P600 only (SV7c models Cooling- main Cooling- Cooling only Heating- Heating 41-3000 pulses PQRY: only 41 pulses Heating-...
  • Page 172 [ VII Control ] -10- Subcool Coil Control (Linear Expansion Valve <LEV1>) <PQHY only> The OC, OS1, and OS2 controls the subcool coil individually. The LEV is controlled every 30 seconds to maintain constant the subcool at the heat source unit heat exchanger outlet that is calculated from the values of high pressure (63HS1) and liquid piping temperature (TH3), or the superheat that is calculated from the values of low pressure (63LS) and the bypass outlet temperature (TH2) of the subcool coil.
  • Page 173 [ VII Control ] (2) System with two heat-source units Initial startup mode starts. The compressor on the OC starts up. 60Hz The total operating load of the indoor unit after 5 minutes of operation is P96 or above. (*1 Qj The compressor on the OC starts up.
  • Page 174 [ VII Control ] (3) System with three heat-source units <PQHY only> Initial startup mode starts. The compressor on the OC starts up. 60Hz The total operating load of the indoor unit after 5 minutes of operation is P96 or above. ( *1 The total operating load of the indoor unit after 5 minutes of operation is between P96 and P400.

  • Page 175: Emergency Operation Mode

    [ VII Control ] -13- Emergency Operation Mode 1. Problems with the heat source unit Emergency operation mode is a temporary operation mode in which the heat source unit that is not in trouble operates when one of the heat source units in the system with two heat-source units is in trouble or when one or two of the heat source units in the system with three heat-source units are in trouble.
  • Page 176 [ VII Control ] (2) Ending the emergency operation 1) End conditions When one of the following conditions is met, emergency operation stops, and the unit makes an error stop. When the integrated operation time of compressor in cooling mode has reached four hours. When the integrated operation time of compressor in heating mode has reached two hours.
  • Page 177 [ VII Control ] Emergency operation pattern (2 heat source units) OC failure OS failure pattern pattern Trouble Normal Normal Trouble Cooling Emergency Permitted Permitted operation Heating Permitted Permitted Capacity that matches Maximum total capacity the total capacity of the of indoor units (Note 1) operable heat source units...
  • Page 178 [ VII Control ] -14- Control Method <PQRY only> The control system configuration for the PQRY models is shown in the chart below. Daisy-chained Non-polar 2-wire Data signal exchange non-polar 2-wire serial communication between system equipment method transmission line 16-bit CPU Calculation, processing microcomputer operation processing...
  • Page 179 [ VII Control ] -15- Cooling/heating Circuit Control and General Function of System Equipment <PQRY> Operation Schematic diagram of refrigerant circuit Schematic diagram of refrigerating cycle Two-phase status Liquid 4-way valve Check valve Selector valve Low- Pressure pressure Low-pressure two-phase pipe Low-pressure Liquid...
  • Page 180 [ VII Control ] -16- Operation Mode <PQHY> (1) Indoor unit operation mode The operation mode can be selected from the following 5 modes using the remote controller. Cooling mode Heating mode Dry mode Fan mode Stopped mode (2) Heat source unit operation mode Cooling mode All indoor units in operation are in cooling mode.
  • Page 181 [ VII Control ] -17- Operation Mode <PQRY> (1) Indoor unit operation mode The operation mode can be selected from the following 6 modes using the remote controller. Cooling mode Heating mode Dry mode Automatic cooling/heating mode Fan mode Stopping mode (2) Heat source unit operation mode Cooling only mode All indoor units in operation are in cooling mode.
  • Page 182 [ VII Control ] -18- DEMAND Control Cooling/heating operation can be prohibited (Thermo-OFF) by an external input to the heat source units. When DIP SW6-8 is set to ON, the 4-step DEMAND control is enabled. Eight-step demand control is possible in the system with two heat source units. Twelve-step demand control is possible in the system with three heat source units.

  • Page 183: Controlling Bc Controller

    [ VII Control ] [3] Controlling BC Controller 1. Control of SV A, SV B, and SV A, SV B, and SV C turn on or off depending on the operation mode of the branch. Mode Cooling Heating Stopped Defrost SV A Port SV B...

  • Page 184: Operation Flow Chart

    [ VII Control ] [4] Operation Flow Chart 1. Mode determination flowchart <PQHY> (1) Indoor unit (cooling, heating, dry, fan mode) Start Normal operation Error Breaker Unit in the stopped state turned on From heat source unit Operation SW turned on 1.
  • Page 185 [ VII Control ] (2) Heat source unit (cooling and heating modes) Start Normal operation Error Breaker Unit in the stopped state turned on "HO" / "PLEASE WAIT" blinks on the remote controller *Note 1 Indoor units registered to the remote controller From indoor unit Operation...
  • Page 186 [ VII Control ] 2. Operations in each mode (1) Cooling operation Cooling operation Normal operation During test run mode 4-way valve OFF Unit in the stopped state Indoor unit fan *Note 1 operation Test run mode Thermostat ON 3-minute restart prevention 1.
  • Page 187 [ VII Control ] (2) Heating operation Normal operation Heating operation Unit in the stopped state During test run mode 4-way valve ON Test run mode Thermostat ON 3-minute restart prevention 1. Indoor unit fan operation at 1. Indoor-heat source unit fan control Very Low speed 2.
  • Page 188 [ VII Control ] (3) Dry operation Dry operation Normal operation Thermostat ON 4-way valve OFF Unit in the stopped state Test run mode *Note 2 Thermostat ON Suction temperature 18°C[64°F] *Note 1 1. Heat source unit (compressor) 1. Indoor unit fan stop intermittent operation 2.
  • Page 189 [ VII Control ] 1. Mode determination flowchart <PQRY> (1) Indoor unit (cooling, heating, dry, fan mode) Start Normal operation Error Breaker Stop turned on Operation SW turned on *Note 1 1. Protection function self-holding cancelled. 2. Indoor unit LEV fully closed. *Note 2 Remote controller Error mode...
  • Page 190 [ VII Control ] (2) Heat source unit (cooling only, heating only, cooling main and heating main modes) Start Normal operation Error Breaker turned on Unit in the stopped state "HO" / "PLEASE WAIT" blinks on the remote controller *Note 1 Indoor units registered to the remote controller...
  • Page 191 [ VII Control ] (3) BC controller (cooling only, heating only, cooling main and heating main modes) Start Normal operation Error Breaker turned on Unit in the stopped state Operation command 1. Determination of operation mode Protection function (Cooling only, Heating only, Mixture self-holding cancelled.
  • Page 192 [ VII Control ] 2. Operations in each mode (1) Cooling operation Cooling operation Normal operation During test run mode 4-way valve OFF Unit in the stopped state Indoor unit fan *Note 1 operation Test run mode Thermostat 3-minute restart prevention 1.
  • Page 193 [ VII Control ] (2) Heating operation Normal operation Heating operation Unit in the stopped state During test run mode 4-way valve ON Test run mode Thermostat 3-minute restart prevention 1. Indoor unit fan operation at 1. Indoor-heat source unit fan control Very Low speed 2.
  • Page 194 [ VII Control ] (3) Dry operation Dry operation Normal operation Thermostat ON 4-way valve OFF Unit in the stopped state Test run mode *Note 2 Thermostat ON Suction temperature 18 C[64 F] *Note 1 1. Heat source unit (compressor) 1.
  • Page 195 [ VII Control ] - 186 - HWE15060...

  • Page 196: Test Run Mode

    VIII Test Run Mode [1] Items to be checked before a Test Run ................. 189 [2] Test Run Method ......................190 [3] Operating Characteristic and Refrigerant Amount ............193 [4] Adjusting the Refrigerant Amount .................. 193 [5] Refrigerant Amount Adjust Mode................... 199 [6] The following symptoms are normal.
  • Page 197 - 188 - HWE15060...

  • Page 198: Items To Be Checked Before A Test Run

    [ VIII Test Run Mode ] VIII Test Run Mode [1] Items to be checked before a Test Run (1) Check for refrigerant leak and loose cables and connectors. (2) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components.

  • Page 199: Test Run Method

    [ VIII Test Run Mode ] [2] Test Run Method 1. MA Remote Controller (PAR-31MAA) (1) Remote controller button functions Function button The assignment of the function buttons varies depending on the screen. Follow the guide screen that will appear at the bottom of the screen (from the left, F1, F2, F3, and F4).
  • Page 200 [ VIII Test Run Mode ] (3) Entering the maintenance information occurs. Step 1: Switching the remote controller screen to "Maintenance information" (Requires the maintenance password. This screen is not accessible while the controller is under centralized control.) On the Service Menu screen, select "Input maintenance Service menu Maintenance information info."...
  • Page 201 [ VIII Test Run Mode ] 2. MA Remote Controller (PAR-21MAA) The figure shows an MA remote controller (PAR-21MAA). ON/OFF button Set Temperature buttons Down Fan Speed button TIME SUN MON TUE WED THU FRI SAT TIMER AFTER AFTER ERROR CODE FUNCTION FILTER WEEKLY...

  • Page 202: Operating Characteristic And Refrigerant Amount

    [ VIII Test Run Mode ] [3] Operating Characteristic and Refrigerant Amount It is important to have a clear understanding of the characteristics of refrigerant and the operating characteristics of air conditioners before attempting to adjust the refrigerant amount in a given system. 1.
  • Page 203 [ VIII Test Run Mode ] 3. Amount of refrigerant to be added<PQHY> The amount of refrigerant that is shown in the table below is factory-charged to the heat source units. The amount necessary for extended pipe (field piping) is not included and must be added on site. Heat source unit model P200 P250...
  • Page 204 [ VIII Test Run Mode ] (2) Example: PQHY-P350YLM-A Indoor 1: P125 A: ø12.7 40 m a: ø9.52 10 m 2: P100 B: ø9.52 10 m b: ø9.52 3: P40 C: ø9.52 15 m c: ø6.35 10 m D: ø9.52 4: P32 10 m d: ø9.52...
  • Page 205 [ VIII Test Run Mode ] 4. Amount of refrigerant to be added <PQRY> The amount of refrigerant that is shown in the table below is factory-charged to the heat source units. The amount necessary for extended pipe (field piping) is not included and must be added on site. Heat source unit model P200 P250...
  • Page 206 [ VIII Test Run Mode ] Charged amount for Heat source units Heat source unit model β (kg) β' (oz) P200 model P250 model P300 model P350 model Single P400 model P450 model P500 model P550 model P600 model Round up the calculation result to the nearest 0.1kg. (Example: 18.04kg to 18.1kg) Round up the calculation result in increments of 4oz (0.1kg) or round it up to the nearest 1oz.
  • Page 207 [ VIII Test Run Mode ] (4) Example for Hybrid City Multi system [P200, P250, P300YLM] Heat source unit Indoor unit (15 ~ 50) HBC controller Indoor unit Indoor unit Indoor unit (15 ~ 50) (15 ~ 50) (15 ~ 50) (5) Sample calculation for Hybrid City Multi system The total length of each liquid line is as follows: Indoor...

  • Page 208: Refrigerant Amount Adjust Mode

    [ VIII Test Run Mode ] [5] Refrigerant Amount Adjust Mode 1. Procedures <PQHY> Follow the procedures below to add or extract refrigerant as necessary depending on the operation mode. When the function switch SW4 No.922 (SW6-10: ON) on the main board on the heat source unit (OC only) is turned to ON, the unit goes into the refrigerant amount adjust mode, and the following sequence is followed.
  • Page 209 [ VIII Test Run Mode ] Start Turn on SW4 No.922 (SW6-10: ON) on the OC. Put all indoor units in the test run mode *Refer to the previous page for *Notes 1-4 in the chart. and run the units in cooling mode. Has the initial start-up mode been completed? Has it been at least...
  • Page 210 [ VIII Test Run Mode ] 2. Procedures <PQRY> Follow the procedures below to add or extract refrigerant as necessary depending on the operation mode. When the function switch SW4 No.922 (SW6-10: ON) on the main board on the heat source unit (OC only) is turned to ON, the unit goes into the refrigerant amount adjust mode, and the following sequence is followed.
  • Page 211 [ VIII Test Run Mode ] Start Turn on SW4 No.922 (SW6-10: ON) on the OC. Put all indoor units in the test run mode *Refer to the previous page for *Notes 1-4 in the chart. and run the units in cooling mode. Has the initial start-up mode been completed? Has it been at least...

  • Page 212: The Following Symptoms Are Normal

    [ VIII Test Run Mode ] [6] The following symptoms are normal. Remote controller Symptoms Cause display The indoor unit does not start "Cooling (heating)" The unit cannot perform a heating (cooling) operation when other indoor after starting cooling (heating) icon blinks on the units are performing a cooling (heating) operation.

  • Page 213: Standard Operation Data (Reference Data)

    [ VIII Test Run Mode ] [7] Standard Operation Data (Reference Data) 1. Single unit <PQHY> (1) Cooling operation Heat source unit model Item PQHY-P200YLM-A PQHY-P250YLM-A 27°C/19°C 27°C/19°C Indoor temperature DB/WB [81°F/66°F] [81°F/66°F] Heat source water temperature °C [ °F]...
  • Page 214 [ VIII Test Run Mode ] Heat source unit model Item PQHY-P300YLM-A PQHY-P350YLM-A 27°C/19°C 27°C/19°C Indoor temperature DB/WB [81°F/66°F] [81°F/66°F] Heat source water temperature °C [ °F] 30[86] 30[86] 5.76 7.20 Heat source water flow rate [G/h] [1522] [1902] [gpm] [25.4] [31.7] No.
  • Page 215 [ VIII Test Run Mode ] Heat source unit model Item PQHY-P400YLM-A PQHY-P450YLM-A 27°C/19°C 27°C/19°C Indoor temperature DB/WB [81°F/66°F] [81°F/66°F] Heat source water temperature °C [ °F] 30[86] 30[86] 7.20 7.20 Heat source water flow rate [G/h] [1902] [1902] [gpm] [31.7] [31.7] No.
  • Page 216 [ VIII Test Run Mode ] Heat source unit model Item PQHY-P500YLM-A PQHY-P550YLM-A 27°C/19°C 27°C/19°C Indoor temperature DB/WB [81°F/66°F] [81°F/66°F] Heat source water temperature °C [ °F] 30[86] 30[86] 7.20 11.52 Heat source water flow rate [G/h] [1902] [3044] [gpm] [31.7] [50.7] No.
  • Page 217 [ VIII Test Run Mode ] Heat source unit model Item PQHY-P600YLM-A 27°C/19°C Indoor temperature DB/WB [81°F/66°F] Heat source water temperature °C [ °F] 30[86] 11.52 Heat source water flow rate [G/h] [3044] [gpm] [50.7] No. of connected units Unit Indoor No.
  • Page 218 [ VIII Test Run Mode ] (2) Heating operation Heat source unit model Item PQHY-P200YLM-A PQHY-P250YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20[68] 20[68] 5.76 5.76 Heat source water flow rate [G/h]...
  • Page 219 [ VIII Test Run Mode ] Heat source unit model Item PQHY-P300YLM-A PQHY-P350YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20[68] 20[68] 5.76 7.20 Heat source water flow rate [G/h] [1522] [1902] [gpm] [25.4] [31.7] No.
  • Page 220 [ VIII Test Run Mode ] Heat source unit model Item PQHY-P400YLM-A PQHY-P450YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20[68] 20[68] 7.20 7.20 Heat source water flow rate [G/h] [1902] [1902] [gpm] [31.7] [31.7] No.
  • Page 221 [ VIII Test Run Mode ] Heat source unit model Item PQHY-P500YLM-A PQHY-P550YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20[68] 20[68] 7.20 11.52 Heat source water flow rate [G/h] [1902] [3044] [gpm] [31.7] [50.7] No.
  • Page 222 [ VIII Test Run Mode ] Heat source unit model Item PQHY-P600YLM-A Indoor temperature DB/WB 20°C/-[68°F/-] Heat source water temperature °C [ °F] 20[68] 11.52 Heat source water flow rate [G/h] [3044] [gpm] [50.7] No. of connected units Unit Indoor No.
  • Page 223 [ VIII Test Run Mode ] 2. 2-unit combination <PQHY> (1) Cooling operation 2-unit combination Item PQHY-P400YSLM-A PQHY-P200YLM-A PQHY-P200YLM-A Indoor temperature DB/WB 27°C/19°C [81°F/66°F] Heat source water temperature °C [ °F] 30 [86] 5.76 5.76 Heat source water flow rate...
  • Page 224 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P450YSLM-A PQHY-P250YLM-A PQHY-P200YLM-A Indoor temperature DB/WB 27°C/19°C [81°F/66°F] Heat source water temperature °C [ °F] 30 [86] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4] [25.4] No. of connected units...
  • Page 225 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P500YSLM-A PQHY-P250YLM-A PQHY-P250YLM-A Indoor temperature DB/WB 27°C/19°C [81°F/66°F] Heat source water temperature °C [ °F] 30 [86] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4] [25.4] No. of connected units Unit Indoor No.
  • Page 226 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P550YSLM-A PQHY-P300YLM-A PQHY-P250YLM-A Indoor temperature DB/WB 27°C/19°C [81°F/66°F] Heat source water temperature °C [ °F] 30 [86] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4] [25.4] No. of connected units Unit Indoor No.
  • Page 227 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P600YSLM-A PQHY-P300YLM-A PQHY-P300YLM-A Indoor temperature DB/WB 27°C/19°C [81°F/66°F] Heat source water temperature °C [ °F] 30 [86] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4] [25.4] No. of connected units Unit Indoor No.
  • Page 228 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P700YSLM-A PQHY-P350YLM-A PQHY-P350YLM-A Indoor temperature DB/WB 27°C/19°C [81°F/66°F] Heat source water temperature °C [ °F] 30 [86] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7] [31.7] No. of connected units Unit Indoor No.
  • Page 229 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P750YSLM-A PQHY-P400YLM-A PQHY-P350YLM-A Indoor temperature DB/WB 27°C/19°C [81°F/66°F] Heat source water temperature °C [ °F] 30 [86] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7] [31.7] No. of connected units Unit Indoor No.
  • Page 230 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P800YSLM-A PQHY-P400YLM-A PQHY-P400YLM-A Indoor temperature DB/WB 27°C/19°C [81°F/66°F] Heat source water temperature °C [ °F] 30 [86] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7] [31.7] No. of connected units Unit Indoor No.
  • Page 231 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P850YSLM-A PQHY-P450YLM-A PQHY-P400YLM-A Indoor temperature DB/WB 27°C/19°C [81°F/66°F] Heat source water temperature °C [ °F] 30 [86] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7] [31.7] No. of connected units Unit Indoor No.
  • Page 232 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P900YSLM-A PQHY-P450YLM-A PQHY-P450YLM-A Indoor temperature DB/WB 27°C/19°C [81°F/66°F] Heat source water temperature °C [ °F] 30 [86] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7] [31.7] No. of connected units Unit Indoor No.
  • Page 233 [ VIII Test Run Mode ] (2) Heating operation 2-unit combination Item PQHY-P400YSLM-A PQHY-P200YLM-A PQHY-P200YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20 [68] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4] [25.4] No.
  • Page 234 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P450YSLM-A PQHY-P250YLM-A PQHY-P200YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20 [68] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4] [25.4] No. of connected units...
  • Page 235 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P500YSLM-A PQHY-P250YLM-A PQHY-P250YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20 [68] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4] [25.4] No. of connected units Unit Indoor No.
  • Page 236 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P550YSLM-A PQHY-P300YLM-A PQHY-P250YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20 [68] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4] [25.4] No. of connected units Unit Indoor No.
  • Page 237 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P600YSLM-A PQHY-P300YLM-A PQHY-P300YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20 [68] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4] [25.4] No. of connected units Unit Indoor No.
  • Page 238 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P700YSLM-A PQHY-P350YLM-A PQHY-P350YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20 [68] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7] [31.7] No. of connected units Unit Indoor No.
  • Page 239 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P750YSLM-A PQHY-P400YLM-A PQHY-P350YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20 [68] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7] [31.7] No. of connected units Unit Indoor No.
  • Page 240 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P800YSLM-A PQHY-P400YLM-A PQHY-P400YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20 [68] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7] [31.7] No. of connected units Unit Indoor No.
  • Page 241 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P850YSLM-A PQHY-P450YLM-A PQHY-P400YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20 [68] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7] [31.7] No. of connected units Unit Indoor No.
  • Page 242 [ VIII Test Run Mode ] 2-unit combination Item PQHY-P900YSLM-A PQHY-P450YLM-A PQHY-P450YLM-A Indoor temperature DB/WB 20°C/- [68°F/-] Heat source water temperature °C [ °F] 20 [68] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7] [31.7] No. of connected units Unit Indoor No.
  • Page 243 [ VIII Test Run Mode ] 3. Single unit <PQRY> (1) Cooling only operation Heat source unit model Item PQRY-P200YLM-A PQRY-P250YLM-A Model name of BC controller CMB-P104V-G1 CMB-P104V-G1 27°C/19°C 27°C/19°C Indoor temperature DB/WB [81 °F/66 °F] [81 °F/66 °F] Heat source water temperature °C [ °F] 30[86] 30[86]...
  • Page 244 [ VIII Test Run Mode ] Heat source unit model Item PQRY-P300YLM-A PQRY-P350YLM-A Model name of BC controller CMB-P106V-G1 CMB-P106V-G1 27°C/19°C 27°C/19°C Indoor temperature DB/WB [81 °F/66 °F] [81 °F/66 °F] Heat source water temperature °C [ °F] 30[86] 30[86] 5.76 7.20 Heat source water flow rate...
  • Page 245 [ VIII Test Run Mode ] Heat source unit model Item PQRY-P400YLM-A PQRY-P450YLM-A Model name of BC controller CMB-P108V-GA1 CMB-P108V-GA1 27°C/19°C 27°C/19°C Indoor temperature DB/WB [81 °F/66 °F] [81 °F/66 °F] Heat source water temperature °C [ °F] 30[86] 30[86] 7.20 7.20 Heat source water flow rate...
  • Page 246 [ VIII Test Run Mode ] Heat source unit model Item PQRY-P500YLM-A PQRY-P550YLM-A Model name of BC controller CMB-P108V-GA1 CMB-P1010V-GA1 27°C/19°C 27°C/19°C Indoor temperature DB/WB [81 °F/66 °F] [81 °F/66 °F] Heat source water temperature °C [ °F] 30[86] 30[86] 7.20 11.52 Heat source water flow rate...
  • Page 247 [ VIII Test Run Mode ] Heat source unit model Item PQRY-P600YLM-A Model name of BC controller CMB-P1013V-GA1 27°C/19°C Indoor temperature DB/WB [81 °F/66 °F] Heat source water temperature °C [ °F] 30[86] 11.52 Heat source water flow rate [G/h] [3044] [gpm] [50.7]...
  • Page 248 [ VIII Test Run Mode ] (2) Heating only operation Heat source unit model Item PQRY-P200YLM-A PQRY-P250YLM-A Model name of BC controller CMB-P104V-G1 CMB-P104V-G1 20°C/− 20°C/− Indoor temperature DB/WB [68 °F/−] [68 °F/−] Heat source water temperature °C [ °F] 20[68] 20[68] 5.76...
  • Page 249 [ VIII Test Run Mode ] Heat source unit model Item PQRY-P300YLM-A PQRY-P350YLM-A Model name of BC controller CMB-P106V-G1 CMB-P106V-G1 20°C/− 20°C/− Indoor temperature DB/WB [68 °F/−] [68 °F/−] Heat source water temperature °C [ °F] 20[68] 20[68] 5.76 7.20 Heat source water flow rate [G/h] [1522]...
  • Page 250 [ VIII Test Run Mode ] Heat source unit model Item PQRY-P400YLM-A PQRY-P450YLM-A Model name of BC controller CMB-P108V-GA1 CMB-P108V-GA1 20°C/− 20°C/− Indoor temperature DB/WB [68 °F/−] [68 °F/−] Heat source water temperature °C [ °F] 20[68] 20[68] 7.20 7.20 Heat source water flow rate [G/h] [1902]...
  • Page 251 [ VIII Test Run Mode ] Heat source unit model Item PQRY-P500YLM-A PQRY-P550YLM-A Model name of BC controller CMB-P108V-GA1 CMB-P1010V-GA1 20°C/− 20°C/− Indoor temperature DB/WB [68 °F/−] [68 °F/−] Heat source water temperature °C [ °F] 20[68] 20[68] 7.20 11.52 Heat source water flow rate [G/h] [1902]...
  • Page 252 [ VIII Test Run Mode ] Heat source unit model Item PQRY-P600YLM-A Model name of BC controller CMB-P1013V-GA1 20°C/− Indoor temperature DB/WB [68 °F/−] Heat source water temperature °C [ °F] 20[68] 11.52 Heat source water flow rate [G/h] [3044] [gpm] [50.7] No.
  • Page 253 [ VIII Test Run Mode ] 4. 2-unit combination <PQRY> (1) Cooling only operation 2-unit combination Item PQRY-P400YSLM-A PQRY-P200YLM-A PQRY-P200YLM-A Model name of BC controller CMB-P108V-GA1 Indoor temperature DB/WB 27°C/19°C [81 °F/66 °F] Heat source water temperature °C [ °F] 30 [86] 5.76 5.76...
  • Page 254 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P450YSLM-A PQRY-P250YLM-A PQRY-P200YLM-A Model name of BC controller CMB-P108V-GA1 Indoor temperature DB/WB 27°C/19°C [81 °F/66 °F] Heat source water temperature °C [ °F] 30 [86] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4]...
  • Page 255 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P500YSLM-A PQRY-P250YLM-A PQRY-P250YLM-A Model name of BC controller CMB-P108V-GA1 Indoor temperature DB/WB 27°C/19°C [81 °F/66 °F] Heat source water temperature °C [ °F] 30 [86] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4]...
  • Page 256 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P550YSLM-A PQRY-P300YLM-A PQRY-P250YLM-A Model name of BC controller CMB-P1010V-GA1 Indoor temperature DB/WB 27°C/19°C [81 °F/66 °F] Heat source water temperature °C [ °F] 30 [86] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4]...
  • Page 257 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P600YSLM-A PQRY-P300YLM-A PQRY-P300YLM-A Model name of BC controller CMB-P1013V-GA1 Indoor temperature DB/WB 27°C/19°C [81 °F/66 °F] Heat source water temperature °C [ °F] 30 [86] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4]...
  • Page 258 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P700YSLM-A PQRY-P350YLM-A PQRY-P350YLM-A Model name of BC controller CMB-P1016V-HA1 Indoor temperature DB/WB 27°C/19°C [81 °F/66 °F] Heat source water temperature °C [ °F] 30 [86] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7]...
  • Page 259 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P750YSLM-A PQRY-P400YLM-A PQRY-P350YLM-A Model name of BC controller CMB-P1016V-HA1 Indoor temperature DB/WB 27°C/19°C [81 °F/66 °F] Heat source water temperature °C [ °F] 30 [86] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7]...
  • Page 260 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P800YSLM-A PQRY-P400YLM-A PQRY-P400YLM-A Model name of BC controller CMB-P1016V-HA1 Indoor temperature DB/WB 27°C/19°C [81 °F/66 °F] Heat source water temperature °C [ °F] 30 [86] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7]...
  • Page 261 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P850YSLM-A PQRY-P450YLM-A PQRY-P400YLM-A Model name of BC controller CMB-P1016V-HA1 Indoor temperature DB/WB 27°C/19°C [81 °F/66 °F] Heat source water temperature °C [ °F] 30 [86] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7]...
  • Page 262 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P900YSLM-A PQRY-P450YLM-A PQRY-P450YLM-A Model name of BC controller CMB-P1016V-HA1 Indoor temperature DB/WB 27°C/19°C [81 °F/66 °F] Heat source water temperature °C [ °F] 30 [86] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7]...
  • Page 263 [ VIII Test Run Mode ] (2) Heating only operation 2-unit combination Item PQRY-P400YSLM-A PQRY-P200YLM-A PQRY-P200YLM-A Model name of BC controller CMB-P108V-GA1 Indoor temperature DB/WB 20°C/- [68 °F/-] Heat source water temperature °C [ °F] 20 [68] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4]...
  • Page 264 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P450YSLM-A PQRY-P250YLM-A PQRY-P200YLM-A Model name of BC controller CMB-P108V-GA1 Indoor temperature DB/WB 20°C/- [68 °F/-] Heat source water temperature °C [ °F] 20 [68] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4]...
  • Page 265 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P500YSLM-A PQRY-P250YLM-A PQRY-P250YLM-A Model name of BC controller CMB-P108V-GA1 Indoor temperature DB/WB 20°C/- [68 °F/-] Heat source water temperature °C [ °F] 20 [68] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4]...
  • Page 266 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P550YSLM-A PQRY-P300YLM-A PQRY-P250YLM-A Model name of BC controller CMB-P1010V-GA1 Indoor temperature DB/WB 20°C/- [68 °F/-] Heat source water temperature °C [ °F] 20 [68] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4]...
  • Page 267 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P600YSLM-A PQRY-P300YLM-A PQRY-P300YLM-A Model name of BC controller CMB-P1013V-GA1 Indoor temperature DB/WB 20°C/- [68 °F/-] Heat source water temperature °C [ °F] 20 [68] 5.76 5.76 Heat source water flow rate [1522] [1522] [25.4]...
  • Page 268 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P700YSLM-A PQRY-P350YLM-A PQRY-P350YLM-A Model name of BC controller CMB-P1016V-HA1 Indoor temperature DB/WB 20°C/- [68 °F/-] Heat source water temperature °C [ °F] 20 [68] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7]...
  • Page 269 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P750YSLM-A PQRY-P400YLM-A PQRY-P350YLM-A Model name of BC controller CMB-P1016V-HA1 Indoor temperature DB/WB 20°C/- [68 °F/-] Heat source water temperature °C [ °F] 20 [68] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7]...
  • Page 270 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P800YSLM-A PQRY-P400YLM-A PQRY-P400YLM-A Model name of BC controller CMB-P1016V-HA1 Indoor temperature DB/WB 20°C/- [68 °F/-] Heat source water temperature °C [ °F] 20 [68] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7]...
  • Page 271 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P850YSLM-A PQRY-P450YLM-A PQRY-P400YLM-A Model name of BC controller CMB-P1016V-HA1 Indoor temperature DB/WB 20°C/- [68 °F/-] Heat source water temperature °C [ °F] 20 [68] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7]...
  • Page 272 [ VIII Test Run Mode ] 2-unit combination Item PQRY-P900YSLM-A PQRY-P450YLM-A PQRY-P450YLM-A Model name of BC controller CMB-P1016V-HA1 Indoor temperature DB/WB 20°C/- [68 °F/-] Heat source water temperature °C [ °F] 20 [68] 7.20 7.20 Heat source water flow rate [1902] [1902] [31.7]...
  • Page 273 [ VIII Test Run Mode ] - 264 - HWE15060...

  • Page 274: Troubleshooting

    IX Troubleshooting [1] Error Code Lists ......................267 [2] Responding to Error Display on the Remote Controller..........271 [3] Investigation of Transmission Wave Shape/Noise............345 [4] Troubleshooting Principal Parts ..................348 [5] Refrigerant Leak ......................380 [6] Compressor Replacement Instructions................384 [7] Water-cooled heat exchanger Replacement Instructions ..........
  • Page 275 - 266 - HWE15060...

  • Page 276: Error Code Lists

    [ IX Troubleshooting ] IX Troubleshooting [1] Error Code Lists Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 0403 4300 Serial communication error/Panel communication error 0404 Indoor unit EEPROM abnormality 1102 1202 Discharge temperature fault 1301...
  • Page 277 [ IX Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 4260 Heatsink overheat protection at startup Return air temperature (TH21) Temperature sensor 5101 1202 OA processing unit inlet tem- fault perature (TH4) Indoor unit pipe temperature...
  • Page 278 [ IX Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Backup operation [115] ACCT sensor fault 5301 4300 [117] ACCT sensor circuit fault [119] Open-circuited IPM/Loose ACCT connector [120] Faulty ACCT wiring 5701 Loose float switch connector...
  • Page 279 [ IX Troubleshooting ] Overload protection Imax Current effective value error Current peak value error Temperature protec- INV board model (Arms) (Arms) (Apeak) tion TOL (°C) PQHY-P200YLM-A PQHY-P250YLM-A PQHY-P300YLM-A PQHY-P350YLM-A INV20Y PQHY-P400YLM-A PQHY-P450YLM-A PQHY-P500YLM-A PQHY-P550YLM-A PQHY-P600YLM-A Overload protection Imax Current effective value error...

  • Page 280: Responding To Error Display On The Remote Controller

    [ IX Troubleshooting ] [2] Responding to Error Display on the Remote Controller 1. Error Code 0403 Serial communication error 2. Error definition and error detection method Serial communication error between the control board and the INV board on the compressor. Detail code 01: Between the control board and the INV board 3.
  • Page 281 [ IX Troubleshooting ] 1. Error Code 0404 A control communication reception error 2. Error definition and error detection method Indoor controller board Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board. 3. Cause, check method and remedy Cause Check method and remedy Defective indoor controller board...
  • Page 282 [ IX Troubleshooting ] 1. Error Code 1102 Discharge temperature fault 2. Error definition and error detection method 1) If the discharge temperature of 120 °C [248°F] or more is detected during the above operation (the first detection), the heat source unit stops once, turns to anti-restart mode for 3 minutes, and restarts after 3 minutes automatically.
  • Page 283 [ IX Troubleshooting ] 1. Error Code 1301 Low pressure fault 2. Error definition and error detection method When starting the compressor from Stop Mode for the first time if low pressure reads 0.098MPa [14psi] immediately before start-up, the operation immediately stops. 3.
  • Page 284 [ IX Troubleshooting ] 1. Error Code 1302 High pressure fault 1 (Heat source unit) 2. Error definition and error detection method 1) If the pressure of 3.78MPa [548psi] or higher is detected by the pressure sensor during operation (the first detection), the heat source stops once, turns to antirestart mode for 3 minutes, and restarts after 3 minutes automatically.
  • Page 285 [ IX Troubleshooting ] 1. Error Code 1302 High pressure fault 2 (Heat source unit) 2. Error definition and error detection method If the pressure of 0.098MPa [14psi] or lower is registered on the pressure sensor immediately before start-up, it will trigger an abnormal stop, and error code "1302"...
  • Page 286 [ IX Troubleshooting ] 1. Error Code 2000 Pump interlock error 2. Error definition and error detection method 1) This error is detected by the pump interlock circuit (TB8 3-4). 2) If it is detected that the pump interlock circuit (TB8 3-4) is open (first detection) during operation or immediately before startup, the heat source unit stops and goes into the 10-minute restart delay mode.
  • Page 287 [ IX Troubleshooting ] 1. Error Code 2135 Water heat exchanger freeze up 2. Error definition and error detection method 1) If either of the following conditions is detected (first detection) during operation, the heat source unit stops, goes into the 3- minute restart delay mode, and automatically restarts after three minutes.
  • Page 288 [ IX Troubleshooting ] 1. Error Code 2500 Drain sensor submergence (Models with a drain sensor) 2. Error definition and error detection method 1) If an immersion of the drain sensor in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage.
  • Page 289 [ IX Troubleshooting ] 1. Error Code 2500 Drain sensor submergence (Models with a float switch) 2. Error definition and error detection method 1) If an immersion of the float switch in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage.
  • Page 290 [ IX Troubleshooting ] 1. Error Code 2502 Drain pump fault (Models with a drain sensor) 2. Error definition and error detection method 1) Make the drain sensor thermistor self-heat. If the temperature rise is small, it is interpreted that the sensor is immersed in water.
  • Page 291 [ IX Troubleshooting ] 1. Error Code 2502 Drain pump fault (Models with a float switch) 2. Error definition and error detection method 1) The immersion of sensor tip in water is detected by the ON/OFF signal from the float switch. Submergence of the sensor When it is detected that the float switch has been ON for 15 seconds, it is interpreted that the sensor tip is immersed in water.
  • Page 292 [ IX Troubleshooting ] 1. Error Code 2503 Drain sensor (Thd) fault 2. Error definition and error detection method If the open or short circuit of the thermistor has been detected for 30 seconds, this condition is considered to be a preliminary error, and the unit goes into the 3-minute restart delay mode.
  • Page 293 [ IX Troubleshooting ] 1. Error Code 2600 Water leakage 2. Cause, check method and remedy Check that water does not leak from the pipes in such as the humidifier. 1. Error Code 2601 Water supply cutoff 2. Cause, check method and remedy Cause Check method and remedy The water tank of the humidifier is empty.
  • Page 294 [ IX Troubleshooting ] 1. Error Code 4102 Open phase 2. Error definition and error detection method An open phase of the power supply (L1 phase, N phase) was detected at power on. The L3 phase current is outside of the specified range. When an open phase is detected (L2-phase or N-phase in the power supply) is detected at the start of operation.
  • Page 295 [ IX Troubleshooting ] 1. Error Code 4106 <Transmission power supply fault error detail FF (Heat source unit)> 2. Error definition and error detection method Transmission power output failure 3. Cause 1) Wiring failure 2) Transmission power supply cannot output voltage because overcurrent was detected. 3) Voltage cannot be output due to transmission power supply problem.
  • Page 296 [ IX Troubleshooting ] 1. Error Code 4115 Power supply signal sync error 2. Error definition and error detection method The frequency cannot be determined when the power is switched on. 3. Cause, check method and remedy Cause Check method and remedy Power supply error Check the voltage of the power supply terminal block (TB1).
  • Page 297 [ IX Troubleshooting ] 1. Error Code 4121 Function setting error 2. Error source, cause, check method and remedy Error source Cause Check method and remedy Heat source Dip switch setting error on the control board Check the SW6-1 setting on the control board. unit Connector connection error on the control Check that nothing is connected to the connector...
  • Page 298 [ IX Troubleshooting ] 1. Error Code 4124 Electric system not operate due to damper abnormality 2. Error definition and error detection method When the damper is not located at the designated position. 3. Cause, check method and remedy When the damper is not located at the designated position. 1) Check there is something that interferes the opening or closing movement of the damper.
  • Page 299 [ IX Troubleshooting ] 1. Error Code 4220 Abnormal bus voltage drop (Detail code 108) 2. Error definition and error detection method If Vdc 289V or less is detected during Inverter operation. (S/W detection) 3. Cause, check method and remedy (1) Power supply environment Find out if there was a (momentary) power failure.
  • Page 300 [ IX Troubleshooting ] 1. Error Code 4220 Abnormal bus voltage rise (Detail code 109) 2. Error definition and error detection method If Vdc 830V is detected during inverter operation. 3. Cause, check method and remedy (1) Different voltage connection Check the power supply voltage on the power supply terminal block (TB1).
  • Page 301 [ IX Troubleshooting ] 1. Error Code 4230 Heatsink overheat protection 2. Error definition and error detection method When the heat sink temperature (THHS) remains at or above TOH is detected. Model PQHY 105°C [221°F] PQRY 100°C [212°F] 3. Cause, check method and remedy Cause Check method and remedy Air passage blockage...
  • Page 302 [ IX Troubleshooting ] 1. Error Code 4250 IPM error (Detail code 101) 2. Error definition and error detection method Overcurrent is detected by the overcurrent detection resistor (RSH) on the INV board. 3. Cause, check method and remedy Cause Check method and remedy Inverter output related Refer to IX [4] -6- (2) [1]-[4].
  • Page 303 [ IX Troubleshooting ] 1. Error Code 4250 Short-circuited IPM/Ground fault (Detail code 104) 2. Error definition and error detection method When IPM/IGBT short damage or grounding on the load side is detected just before starting the inverter. 3. Cause, check method and remedy Cause Check method and remedy Grounding fault compressor...
  • Page 304 [ IX Troubleshooting ] 1. Error Code 4260 Heatsink overheat protection at startup 2. Error definition and error detection method The heatsink temperature (THHS) remains at or above TOH for 10 minutes or more at inverter startup. Model PQHY 105°C [221°F] PQRY 100°C [212°F] 3.
  • Page 305 [ IX Troubleshooting ] 1. Error Code 5101 Return air temperature sensor (TH21) fault (Indoor unit) Return air temperature sensor (TH4) fault (OA processing unit) 5102 Pipe temperature sensor (TH22) fault (Indoor unit) Pipe temperature sensor (TH2) fault (OA processing unit) 5103 Gas-side pipe temperature sensor (TH23) fault (Indoor unit) Gas-side pipe temperature sensor (TH3) fault (OA processing unit)
  • Page 306 [ IX Troubleshooting ] 1. Error Code 5102 HIC bypass circuit outlet temperature sensor (TH2) fault (Heat source unit) 5103 Heat exchanger outlet temperature sensor (TH3) fault (Heat source unit) 5104 Discharge temperature sensor (TH4) fault (Heat source unit) 5105 Accumulator inlet temperature sensor (TH5) fault (Heat source unit) 5106 HIC circuit outlet temperature sensor (TH6) fault (Heat source unit)
  • Page 307 [ IX Troubleshooting ] 1. Error Code 5110 Heatsink temperature sensor (THHS) fault (Detail code 01) 2. Error definition and error detection method When a short or an open of THHS is detected just before or during the inverter operation. 3.
  • Page 308 [ IX Troubleshooting ] 1. Error Code 5201 High-pressure sensor fault (BC controller PS1) 5203 Intermediate pressure sensor fault (BC controller PS3) 2. Error definition and error detection method When a pressure sensor reading of 4.06 MPa [589 psi] or above OR 0.98Mpa[142psi] or below is detected, error codes "5201" OR "5203"...
  • Page 309 [ IX Troubleshooting ] 1. Error Code 5301 ACCT sensor circuit fault (Detail code 117) 2. Error definition and error detection method When an error value is detected with the ACCT detection circuit just before the inverter starts 3. Cause, check method and remedy Cause Check method and remedy INV board failure...
  • Page 310 [ IX Troubleshooting ] 1. Error Code 5301 Faulty ACCT wiring (Detail code 120) 2. Error definition and error detection method Presence of target current cannot be detected during the self-diagnostic operation immediately before startup. (Detection of improperly mounted ACCT sensor) 3.
  • Page 311 [ IX Troubleshooting ] 1. Error Code 5701 Loose float switch connector 2. Error definition and error detection method Detection of the disconnected float switch (open-phase condition) during operation 3. Cause, check method and remedy (1) CN4F disconnection or contact failure Check for disconnection of the connector (CN4F) on the indoor unit control board.
  • Page 312 [ IX Troubleshooting ] 1. Error Code 6600 Address overlaps 2. Error definition and error detection method An error in which signals from more than one indoor units with the same address are received The address and attribute that appear on the remote controller indicate the controller that detected the error. 3.
  • Page 313 [ IX Troubleshooting ] 1. Error Code 6602 Transmission processor hardware error 2. Error definition and error detection method Although "0" was surely transmitted by the transmission processor, "1" is displayed on the transmission line. The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
  • Page 314 [ IX Troubleshooting ] 1. Error Code 6603 Transmission line bus busy error 2. Error definition and error detection method Generated error when the command cannot be transmitted for 4-10 minutes in a row due to bus-busy Generated error when the command cannot be transmitted to the transmission line for 4-10 minutes in a row due to noise The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
  • Page 315 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 316 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 317 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 318 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 319 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 320 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 321 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 322 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 323 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 324 [ IX Troubleshooting ] 1. Error Code 6608 No response error 2. Error definition and error detection method When no response command is returned although acknowledgement (ACK) is received after transmission, an error is detect- When the data is transmitted 10 times in a row with 3 seconds interval, an error is detected on the transmission side. The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
  • Page 325 [ IX Troubleshooting ] 1. Error Code 6831 MA controller signal reception error (No signal reception) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 3 minutes. 3.
  • Page 326 [ IX Troubleshooting ] 1. Error Code 6832 MA remote controller signal transmission error (Synchronization error) 2. Error definition and error detection method MA remote controller and the indoor unit is not done properly. Failure to detect opening in the transmission path and unable to send signals Indoor unit : 3 minutes Remote controller : 6 seconds 3.
  • Page 327 [ IX Troubleshooting ] 1. Error Code 6833 MA remote controller signal transmission error (Hardware error) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. An error occurs when the transmitted data and the received data differ for 30 times in a row. 3.
  • Page 328 [ IX Troubleshooting ] 1. Error Code 6834 MA controller signal reception error (Start bit detection error) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 2 minutes. 3.
  • Page 329 [ IX Troubleshooting ] 1. Error Code 6841 A control communication synchronism not recover 2. Error definition and error detection method Indoor/heat source unit communication error (Transmitting error) (Heat source unit) Abnormal if "0" receiving is detected 30 times continuously though heat source controller circuit board has transmitted "1". Abnormal if heat source controller circuit board could not find blank of transmission path for 3 minutes.
  • Page 330 [ IX Troubleshooting ] 1. Error Code 6843 A control communication start bit detection error 2. Error definition and error detection method Indoor/heat source unit communication error (Signal receiving error) Abnormal if indoor controller board could not receive any signal normally for 6 minutes after turning the power on. Abnormal if indoor controller board could not receive any signal normally for 3 minutes.
  • Page 331 [ IX Troubleshooting ] 1. Error Code 6846 Start-up time over 2. Error definition and error detection method Start-up time over The unit cannot finish start-up process within 4 minutes after power on. 3. Cause, check method and remedy Cause Check method and remedy Contact failure of indoor/heat source unit connecting wire Check disconnection or looseness or polarity...
  • Page 332 [ IX Troubleshooting ] 1. Error Code 7100 Total capacity error 2. Error definition and error detection method The model total of indoor units in the system with one heat source unit exceeds limitations. 3. Error source, cause, check method and remedy, Error source Cause Check method and remedy...
  • Page 333 [ IX Troubleshooting ] 1. Error Code 7101 Capacity code setting error 2. Error definition and error detection method Connection of incompatible (wrong capacity code) indoor unit or heat source unit 3. Error source, cause, check method and remedy Error source Cause Check method and remedy Heat source...
  • Page 334 [ IX Troubleshooting ] 1. Error Code 7102 Wrong number of connected units 2. Error definition and error detection method The number of connected indoor units is "0" or exceeds the allowable value. 3. Error source, cause, check method and remedy Error source Cause Check method and remedy...
  • Page 335 [ IX Troubleshooting ] 1. Error Code 7105 Address setting error 2. Error definition and error detection method Erroneous setting of OC unit address Erroneous setting of BC controller address 3. Cause, check method and remedy Error source Cause Check method and remedy Heat source Erroneous setting of OC unit address Check that the heat source unit and BC con-...
  • Page 336 [ IX Troubleshooting ] 1. Error Code 7107 Port setting error 2. Error definition and error detection method The port with wrong number is connected to the indoor unit.The model total connected to the port is greater than the specifi- cation.
  • Page 337 [ IX Troubleshooting ] 1. Error Code 7110 Connection information signal transmission/reception error 2. Error definition and error detection method The given indoor unit is inoperable because it is not properly connected to the heat source unit in the same system. 3.
  • Page 338 [ IX Troubleshooting ] 1. Error Code 7113 Function setting error (improper connection of CNTYP) 2. Error source, cause, check method and remedy Error source Cause Check method and remedy Heat source Wiring fault (Detail code 15) unit Loose connectors, short-circuit, con- Check the connector CNTYP5 on the control board for tact failure proper connection.
  • Page 339 [ IX Troubleshooting ] 1. Error Code 7117 Model setting error 2. Error source, cause, check method and remedy Error source Cause Check method and remedy Heat source Wiring fault (Detail code 15) unit Loose connectors, short-circuit, con- Check the connector CNTYP5 on the control board for tact failure proper connection.
  • Page 340 [ IX Troubleshooting ] 1. Error Code 7130 Incompatible unit combination 2. Error definition and error detection method The check code will appear when the indoor units with different refrigerant systems are connected. 3. Error source, cause, check method and remedy Error source Cause Check method and remedy...
  • Page 341 [ IX Troubleshooting ] -1- Troubleshooting according to the remote controller malfunction or the external input error In the case of MA remote controller 1. Phenomena Even if the operation button on the remote controller is pressed, the display remains unlit and the unit does not start run- ning.(Power indicator does not appear on the screen.) (1) Cause...
  • Page 342 [ IX Troubleshooting ] In the case of MA remote controller 2. Phenomena When the remote controller operation SW is turned on, the operation status briefly appears on the display, then it goes off, and the display lights out immediately, and the unit stops. (1) Cause 1) The power for the M-NET transmission line is not supplied from the heat source unit.
  • Page 343 [ IX Troubleshooting ] In the case of MA remote controller 3. Phenomena "HO" or "PLEASE WAIT" display on the remote controller does not disappear, and no operation is performed even if the button is pressed. ("HO" or "PLEASE WAIT" display will normally turn off 5 minutes later after the power on.) (1) Cause 1) The power for the M-NET transmission line is not supplied from the heat source unit.
  • Page 344 [ IX Troubleshooting ] Flow chart Even if the operation button on the remote controller is pressed, the indoor and the heat source units do not start running. - 335 - HWE15060...
  • Page 345 [ IX Troubleshooting ] In case of ME remote controller 1. Phenomena Even if the operation button on the remote controller is pressed, the display remains unlit and the unit does not start running. (Power indicator does not appear on the screen.) (1) Cause 1) The power for the M-NET transmission line is not supplied from the indoor unit.
  • Page 346 [ IX Troubleshooting ] In case of ME remote controller 2. Phenomena When the remote controller operation SW is turned on, a temporary operation display is indicated, and the display lights out immediately. (1) Cause 1) The power is not supplied to the indoor unit. The main power of the indoor unit (AC220V) is not on.
  • Page 347 [ IX Troubleshooting ] In case of ME remote controller 3. Phenomena "HO" display on the remote controller does not disappear, and no operation is performed even if the button is pressed. (1) Cause Without using MELANS 1) Heat source unit address is set to "00" 2) A wrong address is set.
  • Page 348 [ IX Troubleshooting ] In case of ME remote controller 4. Phenomena "88" appears on the remote controller when the address is registered or confirmed. (1) Cause, check method and remedy Cause Check method and remedy An error occurs when the address is registered or con- firmed.
  • Page 349 [ IX Troubleshooting ] Both for MA remote controller and ME remote controller 1. Phenomena Although cooling operation starts with the normal remote controller display, the capacity is not enough (1) Cause, check method and remedy Cause Check method and remedy Compressor frequency does not rise sufficiently.
  • Page 350 [ IX Troubleshooting ] Cause Check method and remedy Long piping length Check the piping length to determine if it is contrib- The cooling capacity varies greatly depending on the uting to performance loss. pressure loss. (When the pressure loss is large, the Piping pressure loss can be estimated from the cooling capacity drops.) temperature difference between the indoor unit...
  • Page 351 [ IX Troubleshooting ] 2. Phenomena Although heating operation starts with the normal remote controller display, the capacity is not enough. (1) Cause, check method and remedy Cause Check method and remedy Compressor frequency does not rise sufficiently. Check pressure difference between the detected pressure by the pressure sensor and the actual Faulty detection of pressure sensor.
  • Page 352 [ IX Troubleshooting ] Cause Check method and remedy Indoor unit LEV malfunction Refer to the page of LEV troubleshooting Insufficient refrigerant flows due to LEV malfunction ( [4] -4- ). (not enough opening). Temperature reading error on the indoor unit piping Check the thermistor.
  • Page 353 [ IX Troubleshooting ] 3. Phenomena Heat source unit stops at times during operation. (1) Cause, check method and remedy Cause Check method and remedy The first stop is not considered as an error, as the Check the mode operated in the past by displaying unit turns to anti-restart mode for 3 minutes as a pre- preliminary error history on LED display with SW4.

  • Page 354: Investigation Of Transmission Wave Shape/Noise

    [ IX Troubleshooting ] [3] Investigation of Transmission Wave Shape/Noise 1. M-NET transmission Control is performed by exchanging signals between the heat source unit and the indoor unit (ME remote controller) through M-NET transmission. Noise interference on the transmission line will interrupt the normal transmission, leading to erroneous operation.
  • Page 355 [ IX Troubleshooting ] (3) Check method and remedy 1) Measures against noise Check the followings when noise exists on the wave or the errors described in (1) occur. Error code definition Remedy Check that the wiring 1. The transmission line and Isolate the transmission line from the power line (5cm [1-31/32"] or work is performed ac- the power line are not...
  • Page 356 [ IX Troubleshooting ] 2. MA remote controller transmission The communication between the MA remote controller and the indoor unit is performed with current tone burst. (1) Symptoms caused by noise interference on the transmission line If noise is generated on the transmission line, and the communication between the MA remote controller and the indoor unit is interrupted for 3 minutes in a row, MA transmission error (6831) will occur.

  • Page 357: Troubleshooting Principal Parts

    [ IX Troubleshooting ] [4] Troubleshooting Principal Parts -1- High-Pressure Sensor (63HS1, PS1, PS3) 1. Compare the pressure that is detected by the high pressure sensor, and the high-pressure gauge pressure to check for failure. By configuring the digital display setting switch SW4 (SW6-10: OFF) as shown in the figure below, the pressure as measured by the high-pressure sensor appears on the LED1 on the control board.
  • Page 358 [ IX Troubleshooting ] -2- Low-Pressure Sensor (63LS) 1. Compare the pressure that is detected by the low pressure sensor, and the low pressure gauge pressure to check for failure. By configuring the digital display setting switch SW4 (SW6-10: OFF) as shown in the figure below, the pressure as measured by the low-pressure sensor appears on the LED1 on the control board.
  • Page 359 [ IX Troubleshooting ] -3- Solenoid Valve Check whether the output signal from the control board and the operation of the solenoid valve match. Setting the self-diagnosis switch SW4 (SW6-10: OFF) as shown in the figure below causes the ON signal of each relay to be output to the LED's.
  • Page 360 [ IX Troubleshooting ] Refrigerant Circuit diagram <PQHY> Solenoid valve block SV4a SV4b SV4d SV7a SV7b Water heat exchanger (plate type) THINV LEVINV Water circuit INV-HEX LEV7 63LS LEV6 LEV1 Solenoid valve block(three compartments) 1 is located behind 3 - 351 - HWE15060...
  • Page 361 [ IX Troubleshooting ] Refrigerant Circuit diagram <PQRY> Solenoid valve block SV4a SV4b SV4d SV7a SV7b Water heat exchanger (plate type) THINV LEVINV Water circuit INV-HEX ST13 LEV7 CV2a CV5a LEV6 63LS SV6a CV3a ST18 Solenoid valve block(three compartments) 1 is located behind 3 (4) In the case of SV9 (Bypass valve) This solenoid valve opens when energized (when the relay is on) This valve turns on when the value of 63HS1 is greater than 3.5 MPa [507psi] during Heating-only or Heating-main operation...
  • Page 362 [ IX Troubleshooting ] -4- LEV LEV operation The LEV on the indoor unit and LEV1, LEVINV, LEV6, and LEV7 on the heat source unit are driven by the pulse signal from the circuit board on the indoor and heat-source units and are controlled by a stepping motor (1) Indoor LEV, heat source LEV (LEV6, LEV7), and BC controller LEV (LEV1, LEV2, LEV3) The valve opening changes according to the number of pulses.
  • Page 363 [ IX Troubleshooting ] 4) LEV valve closing and opening operation *When the power is turned on, the valve closing signal of 2200 pulses will be output from the indoor board to LEV to fix the valve position. It must be fixed at point A. When the valve operates smoothly, no sound from LEV or no vibration occurs, however, when the pulses change from E to A in the chart or the valve is locked, a big sound occurs.
  • Page 364 [ IX Troubleshooting ] (2) Heat source LEV (LEV1,LEVINV) The valve opening changes according to the number of pulses. 1) Connections between the heat source control board and LEV Heat source control board DC 12V Brown Drive circuit Blue Orange Yellow White 2) Pulse signal output and valve operation...
  • Page 365 [ IX Troubleshooting ] (3) Judgment methods and possible failure mode The specifications of the heat source unit (heat source LEV), indoor unit (indoor LEV),and BC controller (BC controller LEV) differ.Therefore, remedies for each failure may vary. Check the remedy specified for the appropriate LEV as indicated in the right column.
  • Page 366 [ IX Troubleshooting ] (4) Heat source unit LEV (LEV1,LEVINV) coil removal procedure 1) LEV component As shown in the figure, the heat source LEV is made in such a way that the coils and the body can be separated. Body Coils Stopper...
  • Page 367 [ IX Troubleshooting ] (5) Heat source unit LEV (LEV6,LEV7) and BC controller coil removal procedure 1) Components The Heat source unit LEV consists of a coil and a valve body that can be separated from each other. Body Stopper Coil Lead wire 2) Removing the coil...
  • Page 368 [ IX Troubleshooting ] (6) Indoor unit LEV, BC controller LEV coil removal procedure Motor Driver Locknut Bellows Valve assembling Refrigerant Circuit Valve body side Orifice Notes on the procedure 1) Do not put undue pressure on the motor. 2) Do not use motors if dropped. 3) Do not remove the cap until immediately before the procedure.
  • Page 369 [ IX Troubleshooting ] Replacement procedure 1) Stop the air conditioner. After checking that the air conditioner is stopped, turn off the power of the heat source unit. 2) Prepare two spanners. Hold the valve body with one spanner and loosen the locknut with another one. Turning the locknut counter-clockwise from motor side view can loosen it.

  • Page 370: Pressure Sensor

    [ IX Troubleshooting ] -5- Troubleshooting Principal Parts of BC Controller 1. Pressure sensor Troubleshooting flow chart for pressure sensor START Note 1 Check whether the pressure sensor or the connectors of P1 and P3 are connected, properly Repair the fault. Operating at the moment? Note 2 On the self-diagnosis monitor, measure...
  • Page 371 [ IX Troubleshooting ] 1) BC controller: Phenomena when the pressure sensor is connected wrongly (reverse connection of P1 and P3) to the board. Symptoms Cooling-only Cooling-main Heating only Heating main Non-cooling Indoor heating SC small Normal Non-cooling SC11 large SC11 large SC11 large Indoor heating SC small...

  • Page 372: Temperature Sensor

    [ IX Troubleshooting ] 2. Temperature sensor Troubleshooting instructions for thermistor START Note 1 Pull out the thermistor connector in trouble from the board. Note 2 Measure the temperature of the thermistor in trouble. (actual measurement value) Note 2 Check the thermistor resistor. Compare the temperature corresponding to the resistance measured by the thermistor and the temperature measured by a commercially...
  • Page 373 [ IX Troubleshooting ] 1) For the connectors on the board, TH11 and TH12 are connected to CN10, and TH15 and TH16 are connected to CN11. Dis- connect the connector in trouble, and check the sensor of each number. Pull out the sensor connector from the I/O board, Do not pull the sensor by holding the lead wire. Measure the resistance with such as a tester.
  • Page 374 [ IX Troubleshooting ] 3. Troubleshooting flow chart for LEV Solenoid valve (1) LEV No cooling capacity No heating capacity Note 1 Check whether the electric expansion valve and the solenoid valve connector are not disconnected or not loose. Fault is found. Repair the fault.
  • Page 375 [ IX Troubleshooting ] 1) BC controller: Phenomena when LEV is connected wrongly (reverse connection of LEV1 and LEV3) to the board. Phenomena Cooling-only Cooling-main Heating only Heating main Non-cooling Non-cooling and non-heating Indoor heating SC small Non-cooling SH12 small, SC11 small SH12 small, SC11 small PHM large Indoor heating SC small...
  • Page 376 [ IX Troubleshooting ] Self-diagnosis LED Measurement data Symbol SW4 setting value LEV1 opening 9 10 LEV2 opening 9 10 G, GA LEV3 opening (Standard 9 10 / main) BC controller bypass SH12 outlet superheat 9 10 BC controller intermediate SC16 part subcool 9 10...
  • Page 377 [ IX Troubleshooting ] Troubleshooting flow chart for solenoid valve body Start Check for pins not fully inserted on the connector and check the colors of the lead wires visually. Intermediate connector Control board When LEV is fully closed : tick sound When LEV is fully open : no sound Brown Brown...
  • Page 378 [ IX Troubleshooting ] (2) Solenoid valve (SVA, SVB, SVC) Faulty judgment of solenoid valve Stop the operation of the applied BC remote controller system. Stop the operation Check whether the wire to the solenoid valve is not connected wrongly, or the connector is not loose. No fault Repair the fault.
  • Page 379 [ IX Troubleshooting ] Check whether the BC board output signal corresponds with the solenoid valve operation correspond. 1) SVA, SVB, SVC SVA, SVB, and SVC turn on or off according to the indoor unit operation mode. Mode Cooling Heating Stopped Defrost Port...
  • Page 380 [ IX Troubleshooting ] 4. BC controller transformer BC controller control board CNTR CN03 White Normal Abnormal CNTR(1)-(3) about 58 ohm. Open-phase or shorting CN03(1)-(3) about 1.6 ohm. * Before measuring the resistance, pull out the connector. Refer to the Service Handbook that came with CMB-WP**V-GA(B)1 for information about the Hybrid City Multi system. - 371 - HWE15060...
  • Page 381 [ IX Troubleshooting ] -6- Inverter Replace only the compressor if only the compressor is found to be defective.(Overcurrent will flow through the inverter if the compressor is damaged, however, the power supply is automatically cut when overcurrent is detected, protecting the inverter from damage.
  • Page 382 [ IX Troubleshooting ] Error display/failure condition Measure/inspection item Inverter related errors Check the details of the inverter error in the error log in X LED Monitor 4250, 4220, 4230, 4240,4260, 5301, 0403 Display on the Heat source Unit Board. Take appropriate measures to the error code and the error details in ac- cordance with IX.
  • Page 383 [ IX Troubleshooting ] (2) Inverter output related troubles Items to be checked Phenomena Remedy Turn off the power. Overcurrent error Replace the INV board. Check the Error code: 4250 INV board er- Detail code: No. 101, 104, 105, ror detection 106, and 107 Disconnect the inverter circuit.
  • Page 384 [ IX Troubleshooting ] (3) Trouble treatment when the main power breaker is tripped Items to be checked Phenomena Remedy Check the breaker capacity. Use of a non-specified break- Replace it with a specified breaker. Perform Meg check between the Zero to several ohm, or Meg Check each part and wiring.
  • Page 385 [ IX Troubleshooting ] (5) Simple checking procedure for individual components of main inverter circuit Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the voltage between FT-P and FT-N on INV Board has dropped to DC20V or less. Part name Judgment method IGBT module...
  • Page 386 [ IX Troubleshooting ] Judgment value (reference) Black SC-P1 FT-N SC-L1 SC-L2 SC-L3 SC-P1 5 - 200 ohm 5 - 200 ohm 5 - 200 ohm FT-N SC-L1 5 - 200 ohm SC-L2 5 - 200 ohm SC-L3 5 - 200 ohm Black SC-P2 FT-N...

  • Page 387: Indoor Unit

    [ IX Troubleshooting ] -7- Control Circuit (1) Control power source function block Power source system (380 ~ 415 VAC) Control system (5 ~ 30 VDC) INV board Noise filter Compressor Rectifier Smoothing capacitor Inverter Noise filter 380 - 415VAC Fuse Fuse Terminal block for...
  • Page 388 [ IX Troubleshooting ] (2) Troubleshooting transmission power circuit of heat source unit Check the voltage at the indoor/heat source transmission terminal block (TB3) of heat source unit. Check whether the transmission line is disconnected, DC 24 ~ 30 V check for contact failure, and repair the problem.

  • Page 389: Refrigerant Leak

    [ IX Troubleshooting ] [5] Refrigerant Leak Refer to the relevant sections of the manual for how to set SW4 on the control board. 1. Leak spot: In the case of extension pipe for indoor unit (Cooling season)<PQHY> 1) Mount a pressure gauge on the service check joint (CJ2) on the low-pressure side. 2) Stop all the indoor units, and close the liquid service valve (BV2) inside the heat source unit while the compressor is being stopped.
  • Page 390 [ IX Troubleshooting ] When the power to the heat source-indoor unit must be turned off to repair the leak after closing the service valves specified in the item 4, turn the power off in approximately one hour after the heat source-indoor units stop. 1) When 30 minutes have passed after the item 4 above, the indoor unit lev turns from fully closed to slightly open to prevent the refrigerant seal.
  • Page 391 [ IX Troubleshooting ] 5. Leak spot: In the case of extension pipe for indoor unit (Cooling season)<PQRY> 1) Mount a pressure gauge on the service check joint (CJ2) on the low-pressure side. 2) Stop all the indoor units, and close the high-pressure side refrigerant service valve (BV2) on the heat source unit while the compressor is being stopped.
  • Page 392 [ IX Troubleshooting ] 7. Leak spot: In the case of extension pipe for indoor unit (Heating season) <PQRY> (1) Run all the indoor units in heating test run mode. 1) To run the indoor unit in test run mode, turn on SW4 No.769 (SW6-10: ON) on the heat source control board is ON. 2) Change the setting of the remote controller for all the indoor units to the heating mode.

  • Page 393: Compressor Replacement Instructions

    [ IX Troubleshooting ] [6] Compressor Replacement Instructions 1. Compressor Replacement Instructions Follow the procedures below (Steps 1 through 5) to remove the compressor components and replace the compressor. Reassemble them in the reverse order after replacing the compressor. 1. Remove the service panel (front panels). 2.
  • Page 394 [ IX Troubleshooting ] Acoustic insulation on the compressor Thermal insulation on the accumulator Remove the acoustic insulation from the compressor. Remove or protect the wiring around the compressor and the thermal insulation on the accumulator, unbraze the pipe from the compressor, and replace the compressor.
  • Page 395 [ IX Troubleshooting ] Follow the procedures below (Steps 1 through 4) to remove the compressor components and replace the compressor. Reassemble them in the reverse order after replacing the compressor. Service panels 1. Remove the front service panels (top and bottom). 2.

  • Page 396: Water-Cooled Heat Exchanger Replacement Instructions

    [ IX Troubleshooting ] [7] Water-cooled heat exchanger Replacement Instructions 1. Explained below are procedures for replacing water-cooled heat exchanger assembly parts. 2. Applicable models • PQHY-P200, P250, P300YLM-A • PQRY-P200, P250, P300YLM-A 3. Parts to be serviced The procedures apply to the service parts listed in the table below. Parts to be replaced Required materials Qty.
  • Page 397 [ IX Troubleshooting ] 6) Remove the top panel. 4) Remove the rear panel. 2) Remove all wiring from the unit to the control box, and remove the control box from the unit. 7) Remove the frame FU at above the control box and on the rear at the top.
  • Page 398 [ IX Troubleshooting ] 1. Explained below are procedures for replacing water-cooled heat exchanger assembly parts. 2. Applicable models • PQHY-P350, P400, P450, P500YLM-A 3. Service parts list 4. Procedures *Precautions for starting replacement • Check that the main power supply is OFF. •...
  • Page 399 [ IX Troubleshooting ] 3) To remove the Header Assy After removing Header Assy. Debraze the pipe. (total 2 places) 4) To remove the front panel of the Water Heat Exchanger and the side plate After removing the plate. Remove the screw (total 6 places). Debraze the pipe.(total 1 place) 5) To remove the water pipe (2 pipes) Remove the screw that is fixed to...
  • Page 400 [ IX Troubleshooting ] 1. Explained below are procedures for replacing water-cooled heat exchanger assembly parts. 2. Applicable models • PQHY-P350, P400, P450, P500YLM-A 3. Service parts list 4. Procedures *Precautions for starting replacement • Check that the main power supply is OFF. •...
  • Page 401 [ IX Troubleshooting ] 2) To remove the Frame M After removing Frame M. Remove the screw. (total 4 places) Turn FRAME M Right Side, Pull out. 3) To remove the Water Heat Exchanger and Front Panel Remove the screw (total 2 places) and pipe cover, and then remove the Front Panel according to the 1-5 procedures on the figure below.
  • Page 402 [ IX Troubleshooting ] 1. Explained below are procedures for replacing water-cooled heat exchanger assembly parts. 2. Applicable models • PQHY-P550, P600YLM-A 3. Service parts list 4. Procedures *Precautions for starting replacement • Check that the main power supply is OFF. •...
  • Page 403 [ IX Troubleshooting ] 2) To remove the Frame M After removing Frame M. Remove the screw. (total 4 places) Turn Frame M Right Side, Pull out. 3) To remove the pipe cover Remove the pipe cover. (total 10 places) Remove the Screw.
  • Page 404 [ IX Troubleshooting ] 1. Explained below are procedures for replacing water-cooled heat exchanger assembly parts. 2. Applicable models • PQRY-P350, P400, P450, P500YLM-A 3. Service parts list 4. Procedures *Precautions for starting replacement • Check that the main power supply is OFF. •...
  • Page 405 [ IX Troubleshooting ] 2) To remove the Frame M After removing Frame M. Remove the screw. (total 4 places) Turn Frame M Right Side, Pull out. 3) To remove the Water Heat Exchanger and Front Panel Remove the screw (total 2 places) , pipe cover and cable tie (total 2 places), and then remove the Front Panel according to the 1-5 procedures on the figure below.
  • Page 406 [ IX Troubleshooting ] 1. Explained below are procedures for replacing water-cooled heat exchanger assembly parts. 2. Applicable models • PQRY-P550, P600YLM-A 3. Service parts list 4. Procedures *Precautions for starting replacement • Check that the main power supply is OFF. •...
  • Page 407 [ IX Troubleshooting ] 2) To remove the Frame M After removing Frame M. Remove the screw. (total 4 places) Turn Frame M Right Side, Pull out. 3) To remove the pipe cover Remove the pipe cover. (total 11 places) Remove the Screw.

  • Page 408: Servicing The Bc Controller

    [ IX Troubleshooting ] [8] Servicing the BC controller 1. Service panel *Special care must be taken when replacing heavy parts. Work procedure Explanatory figure 1) Remove the two lock nuts on the control box, loosen the other two, and remove the control box. Ceiling panel Service panel Loosen...
  • Page 409 [ IX Troubleshooting ] 3. Thermistor (liquid pipe/gas pipe temperature detection) *Special care must be taken when replacing heavy parts. Work procedure Explanatory figure (1) Remove the service panel. 1) For TH11, TH12, and TH15, refer to 1. 1), 2). 2) For TH16, refer to 1.
  • Page 410 [ IX Troubleshooting ] 5. LEV Work procedure Explanatory figure (1) Remove the service panel. (See figure at right.) (2) Replace the LEV in trouble. LEV3 LEV1 Secure enough service space in the ceiling for welding operation, and conduct the work carefully.If required, dismount the unit from the ceiling, and conduct the work.

  • Page 411: Troubleshooting Using The Heat Source Unit Led Error Display

    [ IX Troubleshooting ] [9] Troubleshooting Using the Heat source Unit LED Error Display If the LED error display appear as follows while all the slide switches of SW4 are set to OFF, and SW6-10 is set to OFF, check the items under the applicable item numbers below.

  • Page 412: Led Monitor Display On The Heat Source Unit Board

    X LED Monitor Display on the Heat source Unit Board [1] How to Read the LED on the Service Monitor ............... 405 - 403 - HWE15060...
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  • Page 414: How To Read The Led On The Service Monitor

    [ X LED Monitor Display on the Heat source Unit Board ] X LED Monitor Display on the Heat source Unit Board [1] How to Read the LED on the Service Monitor 1. How to read the LED By setting the DIP SW 4-1 through 4-10 (SW6-10: OFF) (Switch number 10 is represented by 0), the operating condition of the unit can be monitored on the service monitor.
  • Page 415 [ X LED Monitor Display on the Heat source Unit Board ] 3. Time data storage function The heat source unit has a simple clock function that enables the unit to calculate the current time with an internal timer by receiving the time set by the system controller, such as AG-150A.
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