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Mitsubishi Electric PUHZ-SHW80YAA Service Manual
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Mitsubishi Electric PUHZ-SHW80YAA Service Manual

Air to water heat pump units
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Table of Contents

SERVICE MANUAL
R410A
[Service Ref.]
[Model Name]
PUHZ-SHW80VAA.UK
PUHZ-SHW80VAA
PUHZ-SHW112VAA
PUHZ-SHW112VAA.UK
PUHZ-SHW80YAA.UK
PUHZ-SHW80Y
PUHZ-SHW80Y
PUHZ-SHW80YAA.UK
PUHZ-SHW80YAA
PUHZ-SHW112YAA.UK
PUHZ-SHW112YAA.UK
PUHZ-SHW112YAA
PUHZ-SW75VAA.UK
PUHZ-SW75VAA
PUHZ-SW100VAA.UK
PUHZ-SW100VAA
PUHZ-SW75YAA.UK
PUHZ-SW75YAA
PUHZ-SW100YAA.UK
PUHZ-SW100YAA
Salt proof model
PUHZ-SHW80VAA-BS.UK
PUHZ-SHW80VAA-BS
PUHZ-SHW112VAA-BS.UK
PUHZ-SHW112VAA-BS
PUHZ-SHW80YAA-BS.UK
PUHZ-SHW80YAA-BS
PUHZ-SHW112YAA-BS.UK
PUHZ-SHW112YAA-BS
PUHZ-SW75VAA-BS.UK
PUHZ-SW75VAA-BS
PUHZ-SW100VAA-BS.UK
PUHZ-SW100VAA-BS
PUHZ-SW75YAA-BS.UK
PUHZ-SW75YAA-BS
PUHZ-SW100YAA-BS.UK
PUHZ-SW100YAA-BS
All manuals and user guides at all-guides.com
Note:
CONTENTS
1. REFERENCE MANUAL ································ 2
2. SAFETY PRECAUTION ······························· 3
3. SPECIFICATIONS ········································ 7
4. DATA ····························································· 9
5. OUTLINES AND DIMENSIONS·················· 11
6. WIRING DIAGRAM ····································· 12
7. WIRING SPECIFICATIONS ························ 16
8. REFRIGERANT SYSTEM DIAGRAM ········ 17
9. TROUBLESHOOTING ································ 20
11. DISASSEMBLY PROCEDURE ··················· 65
PARTS CATALOG (OCB651)
May 2017
No. OCH651

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Summary of Contents for Mitsubishi Electric PUHZ-SHW80YAA

  • Page 1: Table Of Contents

    All manuals and user guides at all-guides.com May 2017 No. OCH651 SERVICE MANUAL R410A [Service Ref.] [Model Name] Note: PUHZ-SHW80VAA.UK PUHZ-SHW80VAA PUHZ-SHW112VAA PUHZ-SHW112VAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW80Y PUHZ-SHW80Y PUHZ-SHW80YAA PUHZ-SHW112YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW112YAA PUHZ-SW75VAA.UK PUHZ-SW75VAA PUHZ-SW100VAA.UK PUHZ-SW100VAA PUHZ-SW75YAA.UK PUHZ-SW75YAA PUHZ-SW100YAA.UK PUHZ-SW100YAA Salt proof model PUHZ-SHW80VAA-BS.UK...

  • Page 2: Reference Manual

    All manuals and user guides at all-guides.com REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL 1-1. FOR AIR TO WATER SYSTEM OCH651...

  • Page 3: Safety Precaution

    All manuals and user guides at all-guides.com SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. Preparation before the repair service. Precautions during the repair service. 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Use new refrigerant pipes.
  • Page 4 All manuals and user guides at all-guides.com [1] Cautions for service (1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them.
  • Page 5 All manuals and user guides at all-guides.com 2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES Flowchart The existing pipe thickness does not meet tions and the pipes are not damaged. 2-4. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL OCH651...
  • Page 6 All manuals and user guides at all-guides.com Cautions for refrigerant piping work Diagram below: Piping diameter and thickness Thickness (mm) Nominal Outside diameter (mm) dimensions(inch) R410A 6.35 9.52 12.70 15.88 19.05 — Flare nut dimensions Flare cutting dimensions (mm) Dimension B (mm) Dimension A ( Nominal Outside...

  • Page 7: Specifications

    All manuals and user guides at all-guides.com SPECIFICATIONS — — OCH651...
  • Page 8 All manuals and user guides at all-guides.com — — OCH651...

  • Page 9: Data

    All manuals and user guides at all-guides.com DATA 4-1. REFILLING REFRIGERANT CHARGE (R410A: kg) — — — 4-2. COMPRESSOR TECHNICAL DATA OCH651...
  • Page 10 All manuals and user guides at all-guides.com 4-3. NOISE CRITERION CURVES PUHZ-SHW80VAA.UK PUHZ-SHW112VAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW112VAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SHW80VAA-BS.UK PUHZ-SW100VAA.UK PUHZ-SW100YAA.UK PUHZ-SHW80YAA-BS.UK PUHZ-SW100VAA-BS.UK PUHZ-SW100YAA-BS.UK SPL(dB) SPL(dB) MODE LINE MODE LINE COOLING COOLING HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50...
  • Page 11 All manuals and user guides at all-guides.com REAR AIR INTAKE 1 FREE SPACE (AROUND THE UNIT) 2 SERVICE SPACE 3 FOUNDATION BOLTS 4 PIPING-WIRING DIRECTIONS 2XU SHAPED NOTCH HOLES THE DIAGRAM BELOW SHOWS A BASIC EXAMPLE. DIMENSIONS OF SPACE NEEDED PLEASE SECURE THE UNIT FIRMLY PIPING AND WIRING CONNECTIONS (FOUNDATION BOLT M10)
  • Page 12 All manuals and user guides at all-guides.com PUHZ-SHW80YAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply> TH33 Thermistor <Comp. Surface> Switch <Function Switch > Terminal Block <Indoor/Outdoor> Linear Expansion Valve Switch <Function Switch, Model Select >...

  • Page 13: Wiring Specifications

    All manuals and user guides at all-guides.com WIRING SPECIFICATIONS FIELD ELECTRICAL WIRING (power wiring specifications) Notes: 1. Wiring size must comply with the applicable local and national codes. 2. Power supply cables and the cables between Interface unit/Flow temp. controller and outdoor unit shall not be lighter than polychloroprene 3.

  • Page 14: Refrigerant System Diagram

    All manuals and user guides at all-guides.com REFRIGERANT SYSTEM DIAGRAM PUHZ-SHW80VAA.UK PUHZ-SHW112VAA.UK PUHZ-SHW80VAA-BS.UK PUHZ-SHW112VAA-BS.UK PUHZ-SHW80YAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW80Y PUHZ-SHW80Y PUHZ-SHW112YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK unit: mm (in) P-SENSOR ball valve REV/V Strainer6 CHECK/V(H) Refrigerant GAS pipe L/P SW (#50) connection [15.88(5/8) Strainer5...
  • Page 15 All manuals and user guides at all-guides.com 8-1. REFRIGERANT COLLECTING (PUMP DOWN) Warning: When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes. pressure in the refrigeration cycle could become extremely high if air is drawn in, causing the pipes to burst, personal injury, etc.

  • Page 16: Troubleshooting

    All manuals and user guides at all-guides.com TROUBLESHOOTING 9-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Unit conditions at service Check code Actions to be taken for service (summary) Judge what is wrong and take a corrective action according Displayed to “9-2.
  • Page 17 All manuals and user guides at all-guides.com 9-2. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is turned on> Abnormal point and detection method Judgment and action Check code Cause — 63L connector open (SW100/SHW80/ SHW112 only) 63H connector open OCH651...
  • Page 18 All manuals and user guides at all-guides.com Check Code Abnormal point and detection method Cause Judgment and action 2 connector open (SW100/SHW80/ SHW112 only) Indoor/outdoor unit connector miswiring, excessive number of units (2 units or more) 4–6 Miswiring of indoor/outdoor unit connecting wire (converse wiring or disconnection) 1–8...
  • Page 19 All manuals and user guides at all-guides.com <Abnormalities detected while unit is operating> Check Code Abnormal point and detection method Judgment and action Cause High pressure (High pressure switch 63H operated) 3–6 8–0 High discharge temperature High comp. surface temperature Open/short circuit of outdoor unit temperature thermistor (TH4, TH33) OCH651...
  • Page 20 All manuals and user guides at all-guides.com Check code Abnormal point and detection method Judgment and action Cause Open/short of outdoor unit thermistors (TH3, TH32 (PUHZ-SHW only), TH6, TH7, and TH8) Temperature of heat sink Power module Too low superheat due to low discharge temperature Outdoor fan motor OCH651...
  • Page 21 All manuals and user guides at all-guides.com Check code Abnormal point and detection method Judgment and action Cause Overvoltage error Undervoltage error Input current sensor error/ L1-phase open error Abnormal power synchronous signal OCH651...
  • Page 22 All manuals and user guides at all-guides.com Check code Abnormal point and detection method Judgment and action Cause PFC error (Overvoltage/ Undervoltage/Overcurrent) PFC/IGBT error (Undervoltage) Overheat protection Abnormal pressure of 63HS Compressor overcurrent interruption (When compressor locked) Current sensor error or input current error 1 Low pressure (63L operated)(SW100/ SHW80/SHW112 only) 2–4...
  • Page 23 All manuals and user guides at all-guides.com Abnormal point and detection method Judgment and action Check code Cause Compressor overcurrent interruption Remote controller transmission error (E0)/ signal receiving error (E4) 1–3, Remote controller control board OCH651...
  • Page 24 All manuals and user guides at all-guides.com Check code Abnormal point and detection method Judgment and action Cause Remote controller transmission error (E3)/ signal receiving error (E5) 2–4 Indoor/outdoor unit communication error (Signal receiving error) (Outdoor unit) 2–4 Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit) 2–4 Non defined check code...
  • Page 25 All manuals and user guides at all-guides.com Abnormal point and detection method Judgment and action Check code Cause Pipe temperature 1–4 Temperature display of indoor condenser/ Temperature display of indoor liquid pipe evaporator pipe Indoor 1 Indoor 1 Temperature display of indoor condenser/ Temperature display of indoor liquid pipe evaporator pipe Indoor 2 Indoor 2...
  • Page 26 All manuals and user guides at all-guides.com 9-3. TROUBLESHOOTING OF PROBLEMS Phenomena Factor Countermeasure OCH651...
  • Page 27 All manuals and user guides at all-guides.com Phenomena Countermeasure SIMPLE WEEKLY AUTO OFF If the unit cannot be operated properly after test run, refer to the following table to find the cause. Symptom Cause Wired remote controller LED 1, 2 (PCB in outdoor unit) For about 2 After LED 1, 2 are lighted, LED 2 is For about 2 minutes following power-on,op-...
  • Page 28 All manuals and user guides at all-guides.com Symptoms: “PLEASE WAIT” is kept being displayed on the remote controller. Inspection method and Diagnosis flow Cause troubleshooting Check the display time of “PLEASE WAIT” after turning on the main power. 6 minutes 2 minutes or more or less...
  • Page 29 All manuals and user guides at all-guides.com controller board Symptoms: Nothing is displayed on the remote controller. 1 Inspection method and Cause troubleshooting Check the voltage between S1 and S2 on the terminal block of the indoor unit which is used to connect the indoor unit and the outdoor unit.
  • Page 30 All manuals and user guides at all-guides.com LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller. 2 LED1 : LED2 : LED3 : Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block of the indoor unit which is used to connect the indoor unit and the outdoor unit.
  • Page 31 All manuals and user guides at all-guides.com controller board Symptoms: Nothing is displayed on the remote controller. 3 LED1 : LED2 : LED3 : — Diagnosis flow Cause troubleshooting Check the voltage of the terminal block (TB6) of the remote controller. 10 to 16 V DC? remote controller remote controller.
  • Page 32 All manuals and user guides at all-guides.com 9-4. HOW TO CHECK THE PARTS PUHZ-SHW80VAA.UK PUHZ-SHW112VAA.UK PUHZ-SHW80VAA-BS.UK PUHZ-SHW112VAA-BS.UK PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW75VAA.UK PUHZ-SW100VAA.UK PUHZ-SW75VAA-BS.UK PUHZ-SW100VAA-BS.UK PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK Check points Parts name Thermistor (TH3) Disconnect the connector then measure the resistance with a tester.
  • Page 33 All manuals and user guides at all-guides.com Check method of DC fan motor (fan motor/outdoor controller circuit board) Notes · High voltage is applied to the connecter (CNF1) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1) for the motor with the power supply on. board and fan motor.) (It causes trouble of the outdoor controller circuit Self check...
  • Page 34 All manuals and user guides at all-guides.com <Thermistor feature chart> Low temperature thermistors " " " " " " " -20 -10 0 10 20 30 40 50 Temperature ( ) Medium temperature thermistor " " " " " " Temperature ( ) High temperature thermistor "...
  • Page 35 All manuals and user guides at all-guides.com (1) Operation summary of the linear expansion valve Outdoor controller board 12 V DC Gray Drive circuit Orange Yellow Black Connector LEV-A LEV-B LEV-C <Output pulse signal and the valve operation> Output Output (Phase) (2) Linear expansion valve operation Open...
  • Page 36 All manuals and user guides at all-guides.com (3) How to attach and detach the coil of linear expansion valve Main body Stopper Coil Lead wire <How to detach the coil> <How to attach the coil> Be sure to attach the stopper. OCH651...
  • Page 37 All manuals and user guides at all-guides.com 9-6. TEST POINT DIAGRAM Outdoor controller circuit board PUHZ-SHW80VAA.UK PUHZ-SHW112VAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80VAA-BS.UK PUHZ-SHW112VAA-BS.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW75VAA.UK PUHZ-SW100VAA.UK PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SW75VAA-BS.UK PUHZ-SW100VAA-BS.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK 1–2 1–3 1–5 2–5 – 3–4 6–5 7–5...
  • Page 38 All manuals and user guides at all-guides.com Outdoor noise filter circuit board PUHZ-SHW80YAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK OCH651...
  • Page 39 All manuals and user guides at all-guides.com Outdoor power circuit board PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK 1–5 – 2–5 3–4 1 2 6 7 6–5 7–5 OCH651...
  • Page 40 All manuals and user guides at all-guides.com Outdoor converter circuit board PUHZ-SHW80YAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK OCH651...
  • Page 41 All manuals and user guides at all-guides.com 9-7. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS (1) Function of switches PUHZ-SHW80VAA.UK PUHZ-SHW112VAA.UK PUHZ-SHW80VAA-BS.UK PUHZ-SHW112VAA-BS.UK PUHZ-SHW80YAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW75VAA.UK PUHZ-SW100VAA.UK PUHZ-SW75VAA-BS.UK PUHZ-SW100VAA-BS.UK PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK Type Action by the switch operation...
  • Page 42 All manuals and user guides at all-guides.com Type of Action by the switch operation Switch Function Effective timing Switch — — — — — — — — — — — — — — — — — — PUHZ-SHW80/112VAA PUHZ-SW75/100VAA MODEL MODEL MODEL MODEL...
  • Page 43 All manuals and user guides at all-guides.com PUHZ-SHW80VAA.UK PUHZ-SHW112VAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80VAA-BS.UK PUHZ-SHW112VAA-BS.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW75VAA.UK PUHZ-SW100VAA.UK PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SW75VAA-BS.UK PUHZ-SW100VAA-BS.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK <Display function of inspection for outdoor unit> [Display] (1)Normal condition Outdoor controller board A-Control Service Tool...
  • Page 44 All manuals and user guides at all-guides.com Indication Error Outdoor controller board Detailed Check Contents Inspection method reference code* LED1 (Green) LED2 (Red) page 1Check if stop valves are open. 3 blinking 1 blinking Abnormality of discharging 2Check if connectors (TH4, LEV-A, and LEV-B) on outdoor controller temperature (TH4) and Comp.
  • Page 45 All manuals and user guides at all-guides.com <Outdoor unit operation monitor function> [When optional part “A-Control Service Tool (PAC-SK52ST)” is connected to outdoor controller board (CNM)] 2 3 4 5 6 <Digital indicator LED1 working details> 1 second interval 2 3 4 5 6 The ones digit : Relay output The tens digit : Operation mode Warming-up...
  • Page 46 All manuals and user guides at all-guides.com 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6...
  • Page 47 All manuals and user guides at all-guides.com 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 OCH651...
  • Page 48 All manuals and user guides at all-guides.com 2 3 4 5 6 Capacity Code SW75/SHW80 SW100/SHW112 2 3 4 5 6 Setting details H·P / 2 3 4 5 6 Setting details 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6...
  • Page 49 All manuals and user guides at all-guides.com 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 Description Display...
  • Page 50 All manuals and user guides at all-guides.com 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 OCH651...
  • Page 51 All manuals and user guides at all-guides.com 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 OCH651...
  • Page 52 All manuals and user guides at all-guides.com 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 2 3 4 5 6 OCH651...
  • Page 53 All manuals and user guides at all-guides.com The tens digit Display Compressor operating frequency control Primary current control Secondary current control The ones digit (In this digit, the total number of activated control is displayed.) Display Compressor operating frequency control Preventive control for excessive temp- erature rise of discharge temperature Preventive control for excessive temp-...

  • Page 54: Monitoring The Operation Data By The Remote Controller

    All manuals and user guides at all-guides.com MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 10-1. Request code list Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed. Refer to indoor unit service manual for how to use the controllers and request codes for indoor unit. Description Request content Unit...
  • Page 55 All manuals and user guides at all-guides.com Description Request content Unit Remarks (Display range) Outdoor unit-Control state – Refer to 10-1-1.Detail Contents in Request Code. Compressor-Frequency control state Refer to 10-1-1.Detail Contents in Request Code. – Outdoor unit-Fan control state Refer to 10-1-1.Detail Contents in Request Code.
  • Page 56 All manuals and user guides at all-guides.com Description Request content Unit Remarks (Display range) Error history 1 (latest) Displays error history. (" --" is displayed if no history is present.) Code Error history 2 (second to last) Displays error history. (" --" is displayed if no history is present.) Code Error history 3 (third to last) Displays error history.
  • Page 57 All manuals and user guides at all-guides.com 10-1-1. Detail Contents in Request Code [Operation state] (Request code :" 0") Relay output state Power currently Data display Display Compressor Four-way valve Solenoid valve supplied to compressor – – – – Relay output state Operation mode Operation mode Display...
  • Page 58 All manuals and user guides at all-guides.com [Actuator output state] (Request code :"54") Data display Actuator output state 1 Actuator output state 2 Actuator output state Actuator output state Compressor is Display Four-way valve Compressor Display warming up [Error content (U9)] (Request code :"55 ") Data display Error content 1 Error content 2...
  • Page 59 All manuals and user guides at all-guides.com [Outdoor unit -– Capacity setting display] (Request code : "70") Data display Capacity [Outdoor unit – Setting information] (Request code : "71") Setting information 1 Data display Display Defrost mode Setting information 1 Standard Setting information 2 For high humidity...

  • Page 60: Disassembly Procedure

    All manuals and user guides at all-guides.com DISASSEMBLY PROCEDURE PUHZ-SHW80VAA.UK PUHZ-SHW112VAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80VAA-BS.UK PUHZ-SHW112VAA-BS.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW100VAA.UK PUHZ-SW100YAA.UK PUHZ-SW100VAA-BS.UK PUHZ-SW100YAA-BS.UK OPERATING PROCEDURE PHOTOS 1. Removing the service panel and top panel Photo 1 Note 1: When removing service panel and top panel at the same time, count 2 less screws since they share a screws.
  • Page 61 All manuals and user guides at all-guides.com OPERATING PROCEDURE PHOTOS 4. Disassembling the electrical parts box (V model only) Photo 4-1 Photo 4-2 Photo 4-3 Photo 4-4 Note 1: When reassembling the electrical parts box, make sure the wirings are correct. 5.
  • Page 62 All manuals and user guides at all-guides.com OPERATING PROCEDURE PHOTOS 6. Removing the thermistor <2-Phase Pipe> (TH6) Photo 6 Note 1: When replacing thermistor <2-phase pipe> (TH6), replace it together with thermistor <Ambient> (TH7) since they are combined together. Refer to procedure No.7 to remove the thermistor <Ambient>...
  • Page 63 All manuals and user guides at all-guides.com OPERATING PROCEDURE PHOTOS 9. Removing the thermistor <Discharge> (TH4), thermistor Photo 9-1 <Suction> (TH32) (*1) and thermistor <Comp. Surface> (TH33) Photo 9-2 For SHW·model only 10. Removing the 4-way valve coil (21S4), LEV coil (LEV-A, Photo 10 (SW100 model) LEV-B, LEV-C (*1)
  • Page 64 All manuals and user guides at all-guides.com OPERATING PROCEDURE PHOTOS 11. Removing the 4-way valve, LEV (LEV-A, LEV-B, LEV-C (*1) Photo 11 (SHW model) high pressure switch, low pressure switch and high pres- sure sensor. Note 1: Recover refrigerant without spreading it in the air. Note 2: When installing the following parts, cover it with a wet cloth to prevent it from heating as the tem- Photo 12...
  • Page 65 All manuals and user guides at all-guides.com OPERATING PROCEDURE PHOTOS 13. Removing the receiver Photo 13 Note 1: Recover refrigerant without spreading it in the air. 14. Removing the reactor (ACL1, ACL2, ACL3) (Y model only) Photo 14 Note 1: Pay extra attention when handling the reactor since it is very heavy (4.1 kg).
  • Page 66 All manuals and user guides at all-guides.com PUHZ-SW75VAA.UK PUHZ-SW75YAA.UK PUHZ-SW75VAA-BS.UK PUHZ-SW75YAA-BS.UK OPERATING PROCEDURE PHOTOS 1. Removing the service panel and top panel Photo 1 Note 1: When removing service panel and top panel at the same time, count 2 less screws since they share a screws.
  • Page 67 All manuals and user guides at all-guides.com OPERATING PROCEDURE PHOTOS 4. Disassembling the electrical parts box (V model only) Photo 4-1 Photo 4-2 Photo 4-3 Photo 4-4 Note 1: When reassembling the electrical parts box, make sure the wirings are correct. 5.
  • Page 68 All manuals and user guides at all-guides.com OPERATING PROCEDURE PHOTOS 6. Removing the thermistor <2-Phase Pipe> (TH6) Photo 6 Note 1: When replacing thermistor <2-phase pipe> (TH6), replace it together with thermistor <Ambient> (TH7) since they are combined together. Refer to procedure No.7 to remove the thermistor <Ambient>...
  • Page 69 All manuals and user guides at all-guides.com OPERATING PROCEDURE PHOTOS 9. Removing the thermistor <Discharge> (TH4) and thermis- Photo 9 tor <Comp. Surface> (TH33) 10. Removing the 4-way valve coil (21S4), LEV coil (LEV-A, LEV-B) Photo 10 and lead wire for high pressure switch and high pressure sensor. 11.
  • Page 70 All manuals and user guides at all-guides.com OPERATING PROCEDURE PHOTOS 12. Removing the compressor (MC) Photo 11-1 Note 1: Recover refrigerant without spreading it in the air. 2: Tighten the nuts of compressor with a torque of 4 ± 0.4 N·m. 13.
  • Page 71 All manuals and user guides at all-guides.com...

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