Mitsubishi PUHZ-SHW112YAA Service Manual
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Mitsubishi PUHZ-SHW112YAA Service Manual

Air to water heat pumps units
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SERVICE MANUAL

R410A

[Model Name]

PUHZ-SHW80VAA
PUHZ-SHW112VAA
PUHZ-SHW80YAA
PUHZ-SHW112YAA
PUHZ-SW75VAA
PUHZ-SW100VAA
PUHZ-SW75YAA
PUHZ-SW100YAA
Salt proof model
PUHZ-SHW80VAA-BS
PUHZ-SHW112VAA-BS
PUHZ-SHW80YAA-BS
PUHZ-SHW112YAA-BS
PUHZ-SW75VAA-BS
PUHZ-SW100VAA-BS
PUHZ-SW75YAA-BS
PUHZ-SW100YAA-BS
[Service Ref.]
PUHZ-SHW80VAA.UK
PUHZ-SHW112VAA.UK
PUHZ-SHW80Y
PUHZ-SHW80Y
PUHZ-SHW80YAA.UK
PUHZ-SHW80YAA.UK
PUHZ-SHW112YAA.UK
PUHZ-SHW112YAA.UK
PUHZ-SW75VAA.UK
PUHZ-SW100VAA.UK
PUHZ-SW75YAA.UK
PUHZ-SW100YAA.UK
PUHZ-SHW80VAA-BS.UK
PUHZ-SHW112VAA-BS.UK
PUHZ-SHW80YAA-BS.UK
PUHZ-SHW112YAA-BS.UK
PUHZ-SW75VAA-BS.UK
PUHZ-SW100VAA-BS.UK
PUHZ-SW75YAA-BS.UK
PUHZ-SW100YAA-BS.UK
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 PUHZ-SHW112YAA

  • Page 1: Service Manual

    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 PUHZ-SW75VAA.UK 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...

  • Page 2: Reference Manual

    REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL 1-1. FOR AIR TO WATER SYSTEM OCH651...

  • Page 3: Safety Precaution

    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 [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. [2] Additional refrigerant charge When charging directly from cylinder Unit...
  • Page 5 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 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 cutting dimensions Flare nut dimensions Dimension A ( (mm) Dimension B (mm) Nominal Outside Nominal Outside -0.4...

  • Page 7: Specifications

    SPECIFICATIONS — — OCH651...
  • Page 8 — — OCH651...
  • Page 9 DATA 4-1. REFILLING REFRIGERANT CHARGE (R410A: kg) — — — 4-2. COMPRESSOR TECHNICAL DATA OCH651...

  • Page 10: Noise Criterion Curves

    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 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE...
  • Page 11 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) EXPLANATION OF PARTICULAR DETAILS ARE FOR SERVICE ACCESS ARE...
  • Page 12 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> LEV-A, LEV-B, LEV-C Linear Expansion Valve Switch <Function Switch, Model Select > Motor for Compressor ACL1, ACL2, Switch <Function Switch >...

  • Page 13: Wiring Specifications

    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

    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 H/P SW (#100) CHECK/V(L) MUFFLER TH32 TH33...
  • Page 15 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. OCH651...

  • Page 16: Troubleshooting

    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: Connector Open (Sw100/Shw80/ 1

    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: Table Of Contents

    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 Startup time over Incorrect connection...
  • Page 19 <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 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 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 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 OCH651...
  • Page 23 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 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 Serial communication error OCH651...
  • Page 25 Abnormal point and detection method Judgment and action Check code Cause 1–4 Pipe temperature 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 A-Control Service Tool...
  • Page 26 9-3. TROUBLESHOOTING OF PROBLEMS Phenomena Factor Countermeasure OCH651...
  • Page 27 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- minutes after...
  • Page 28 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 How long is “PLEASE WAIT” “PLEASE WAIT”...
  • Page 29 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 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 controller board LED1 : Symptoms: Nothing is displayed on the remote controller. 3 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 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 Parts name Check points Thermistor (TH3) Disconnect the connector then measure the resistance with a tester. <Liquid> (At the ambient temperature 10 to 30:)
  • Page 33 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. (It causes trouble of the outdoor controller circuit board and fan motor.) Self check...
  • Page 34 <Thermistor feature chart> Low temperature thermistors " " " " " " " -20 -10 0 10 20 30 40 50 Temperature ( ) Medium temperature thermistor " " " " " " Temperature ( ) High temperature thermistor " "...
  • Page 35 (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 Close Open 500 pulse...
  • Page 36 (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 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 2–4: 1–3: 1–4 5–4 6–4 7–4...
  • Page 38 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 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 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 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 Function Effective timing Switch switch...
  • Page 42 Action by the switch operation Type of Switch Function Effective timing Switch — — — — — — — — — — — — — — — — — — PUHZ-SHW80/112VAA PUHZ-SW75/100VAA MODEL MODEL MODEL MODEL 112V 100V 1 2 3 4 5 6 7 1 2 3 4 5 6 7 1 2 3 4 5 6 7 1 2 3 4 5 6 7...

  • Page 43: Miswiring Of Indoor/Outdoor Unit 1

    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 Unit condition LED1 (Green) LED2 (Red)
  • Page 44 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: Connecting Wire (Converse Wiring Or Disconnection)

    <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 Display...

  • Page 46: Och651

    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 2 3 4 5 6...
  • Page 47 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 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 OCH651...
  • Page 49 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 Normal...
  • Page 50 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 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 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 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- erature rise of condensing temperature 2 3 4 5 6...

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

    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 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 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 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 Operation mode STOP FAN COOL DRY...
  • Page 58 [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 Error content...
  • Page 59 [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 Setting information 2 Single-/ Heat pump/...

  • Page 60: Disassembly Procedure

    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 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. Disassembling the electrical parts box (Y model only) Photo 5-1 Photo 5-2 Photo 5-3...
  • Page 62 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 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) ), lead wire for high pressure switch, low pressure switch, and high pressure sensor.
  • Page 64 OPERATING PROCEDURE PHOTOS (*1) 11. Removing the 4-way valve, LEV (LEV-A, LEV-B, LEV-C 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 perature below, then braze the pipes so that the...
  • Page 65 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 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. 2. Removing the fan motor (MF1) Photo 2-1 Photo 2-2 Note 1: When attaching the fan motor, make sure to route...
  • Page 67 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. Disassembling the electrical parts box (Y model only) Photo 5-1 Photo 5-2 Photo 5-3...
  • Page 68 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 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 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. Removing the receiver Note 1: Recover refrigerant without spreading it in the air. Photo 11-2 14.

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