Mitsubishi PUHZ-W85VHA2.UK Service Manual
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Mitsubishi PUHZ-W85VHA2.UK Service Manual

Air to water heat pump
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AIR TO WATER HEAT PUMP

SERVICE MANUAL

R410A
[Model Name]
PUHZ-W85VHA2
PUHZ-W85VHA2-BS
[Service Ref.]
Revision:
• Added
• Some descriptions have
Notes:
• This manual describes only
• RoHS compliant products
CONTENTS
1. TECHNICAL CHANGES .................................. 2
2. SAFETY PRECAUTION ................................... 3
3. SPECIFICATIONS ............................................ 6
4. DATA ............................................................. 10
5. OUTLINES AND DIMENSIONS ..................... 12
6. WIRING DIAGRAM ........................................ 13
7. WIRING SPECIFICATIONS ........................... 16
9. TROUBLESHOOTING ................................... 18
10. DISASSEMBLY PROCEDURE ...................... 54
PARTS CATALOG (OCB465)
November 2015
No. OCH465
REVISED EDITION-D
PUHZ-W85VHA2R5.UK and
PUHZ-W85VHA2R5-BS.UK
in REVISED EDITION-D.
been modified.
• Please void OCH465
REVISED EDITION-C.
service data of outdoor unit.
have <G> mark on the
spec name plate.

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Summary of Contents for Mitsubishi PUHZ-W85VHA2.UK

  • Page 1: Table Of Contents

    AIR TO WATER HEAT PUMP November 2015 No. OCH465 REVISED EDITION-D SERVICE MANUAL R410A [Model Name] [Service Ref.] Revision: • Added PUHZ-W85VHA2.UK PUHZ-W85VHA2R5.UK and PUHZ-W85VHA2 PUHZ-W85VHA2R5-BS.UK in REVISED EDITION-D. PUHZ-W85VHA2R1.UK • Some descriptions have been modified. PUHZ-W85VHA2R3.UK • Please void OCH465 PUHZ-W85VHA2R4.UK...

  • Page 2: Puhz-W85Vha2.Uk

    PUHZ-W85VHA2R1.UK PUHZ-W85VHA2R3.UK PUHZ-W85VHA2R1-BS.UK PUHZ-W85VHA2R3-BS.UK 1. Added a new function "Energy Monitor" which allows remote controller to display power consumption and heat output. PUHZ-W85VHA2.UK PUHZ-W85VHA2R1.UK PUHZ-W85VHA2-BS.UK PUHZ-W85VHA2R1-BS.UK 1. Heat exchanger and plate heat exchanger have been changed. 2. Outdoor controller board has been changed.

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Do not use refrigerant other than R410A. If other refrigerant (R22, etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil, etc. Use a vacuum pump with a reverse flow check valve.
  • 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. [2] Additional refrigerant charge When charging directly from cylinder ·...
  • Page 5 2-3. CAUTIONS FOR REFRIGERANT PIPING WORK Tools for R410A (The following table shows whether conventional tools can be used or not.) Tools and materials R410A tools Can R22 tools be used? Can R407C tools be used? Gauge manifold Air purge, refrigerant charge Tool exclusive for R410A and operation check Charge hose...

  • Page 6: Specifications

    SPECIFICATIONS 3-1. SPECIFICATIONS PUHZ-W85VHA2.UK PUHZ-W85VHA2-BS.UK 1 , 230 V, 50 Hz Nominal water flow rate (Heating mode) L/min 25.8 Heating(A7/W35) Heating y t i (Min. 2.70) 9.00 7°C 4.18 (A7/W35) 6°C 2.15 l n i 5°C (Min. 2.60) 8.50 Heating...
  • Page 7 0.012 Cooling pump input (based on EN14511) Note: "Capacity", "COP" and "Power input" in the above table are values that contains the "pump input (based on EN 14511) ". c i f PUHZ-W85VHA2R1(-BS).UK MITSUBISHI Service Ref. PUHZ-W85VHA2R3(-BS).UK MWA1–44LM 9.38 Running current...
  • Page 8 Note: "Capacity", "COP" and "Power input" in the above table are values that contains the "pump input (based on EN 14511) ". t i n i f i o i t PUHZ-W85VHA2R4(-BS).UK Service Ref. MITSUBISHI PUHZ-W85VHA2R5(-BS).UK MWA1–44LM 9.38 Running current Heating...
  • Page 9 3-2. AVAILABLE RANGE (WATER FLOW RATE, RETURN WATER TEMP.) Note: If the value of water flow rate and return water temp. become lower than the available range, it could cause damage to the parts of unit. <Heating> <Applicable Models> • PUHZ-W85VHA2(-BS).UK 19.0 Available range •...

  • Page 10: Data

    DATA 4-1. NOISE CRITERION CURVES MICROPHONE UNIT 1.5m GROUND PUHZ-W85VHA2(-BS).UK PUHZ-W85VHA2R1(-BS).UK PUHZ-W85VHA2R3(-BS).UK PUHZ-W85VHA2R4(-BS).UK MODE SPL(dB) LINE COOLING PUHZ-W85VHA2R5(-BS).UK HEATING NC-70 NC-60 NC-50 NC-40 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS NOISE 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz OCH465D...

  • Page 11: The Unit Of Pressure Has Been Changed To Mpa Based On International Si System

    4-2. STANDARD OPERATION DATA Cooling Heating Mode (A35/W7) (A7/W35) Capacity 7,500 9,000 Input 3.04 2.15 Outdoor unit PUHZ-W85VHA2 Phase, Hz 1, 50 Voltage Current 13.15 9.38 Discharge pressure 2.81 2.16 Suction pressure 0.73 0.64 Discharge temperature ºC Condensing temperature ºC Suction temperature ºC Flow volume...

  • Page 12: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUHZ-W85VHA2.UK PUHZ-W85VHA2R1.UK PUHZ-W85VHA2R3.UK PUHZ-W85VHA2-BS.UK PUHZ-W85VHA2R1-BS.UK PUHZ-W85VHA2R3-BS.UK PUHZ-W85VHA2R4.UK PUHZ-W85VHA2R5.UK PUHZ-W85VHA2R4-BS.UK PUHZ-W85VHA2R5-BS.UK Unit: mm OCH465D...

  • Page 13: Wiring Diagram

    WIRING DIAGRAM PUHZ-W85VHA2.UK PUHZ-W85VHA2-BS.UK SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply,Interface unit / TABP1/P2 Connection Terminal < DC Voltage> Flow temp. controller> TABN1/N2 Connection Terminal < DC Voltage> Motor for Compressor DS2, DS3 Diode bridge Fan Motor Power Module 21S4 Solenoid Valve <Four-Way Valve>...
  • Page 14 PUHZ-W85VHA2R1.UK PUHZ-W85VHA2R3.UK PUHZ-W85VHA2R4.UK PUHZ-W85VHA2R1-BS.UK PUHZ-W85VHA2R3-BS.UK PUHZ-W85VHA2R4-BS.UK SYMBOL NAME SYMBOL NAME Terminal Block<Power Supply,Interface unit / TABP1/P2 Connection Terminal<DC Voltage> Flow temp. controller> TABN1/N2 Connection Terminal<DC Voltage> Motor for Compressor DS2, DS3 Diode bridge Fan Motor Power Module 21S4 N. F. Noise Filter Circuit Board Solenoid Valve(Four-Way Valve) Solenoid Valve<Bypass Valve>...
  • Page 15 PUHZ-W85VHA2R5.UK PUHZ-W85VHA2R5-BS.UK SYMBOL NAME SYMBOL NAME Terminal Block ACTM Active Filter Module <Power Supply, Indoor/Outdoor> CY1, CY2 Capacitor Motor for Compressor Power Circuit Board P. B. Fan Motor N. F. Noise Filter Circuit Board 21S4 Solenoid Valve (4-Way Valve) C. B. Controller Circuit Board F1, F2, F3, F4 Fuse <T6.3AL250V>...

  • Page 16: Wiring Specifications

    WIRING SPECIFICATIONS FIELD ELECTRICAL WIRING (power wiring specifications) t i n Outdoor unit power supply ~/N (single), 50 Hz, 230 V t i n c r i t i u y t i t i n 3 × Min. 4 3 ×...

  • Page 17: Refrigerant System Diagram

    Refrigerant flow in heating Refrigerant flow in cooling Symbol Part name Detail COMP Compressor DC inverter twin rotary compressor (Mitsubishi Electric Corporation) H/P SW High pressure switch (63H) For protection (OFF: 4.15MPa) ACH30-50 Plates (Alfa Laval) (for PUHZ-W85VHA2(-BS).UK) Plate HEX Plate Heat Exchanger MWA1-44LM (MITSUBISHI) (for PUHZ-W85VHA2R1/R3/R4/R5(-BS).UK)

  • Page 18: Troubleshooting

    TROUBLESHOOTING 9-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged, and they can be displayed on the control board of outdoor unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summarized in the table below. Check the contents below before investigating details.
  • Page 19 9-3. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is turned on> Abnormal point and detection method Judgment and action Check code Case 1 No voltage is supplied to terminal 1 Check following items. block (TB1) of outdoor unit. a) Power supply breaker is a) Power supply breaker turned off.
  • Page 20 Abnormal point and detection method Case Judgment and action Check code Check disconnection or looseness or polarity Miswiring of Interface unit/Flow temp. Contact failure or miswiring of Interface unit/Flow temp. controller-outdoor controller-outdoor unit connecting wire of Interface unit/Flow temp. unit connecting wire of Interface unit/Flow 1.
  • Page 21 <Abnormalities detected while unit is operating> Check code Abnormal point and detection method Judgment and action Case High pressure (High-pressure switch 1 Decreased water flow 1–5 Check water circuit and repair the defect. 63H activated) 2 Clogged filter of water pipe Abnormal if high-pressure switch 63H is 3 Dirt of plate heat exchanger activated (*) during compressor operation.
  • Page 22 Abnormal point and detection method Judgment and action Case Check code Open/short of outdoor unit thermistors 1 Disconnection or contact failure 1 Check connection of connector (TH3, TH32, (TH3, TH32, TH6, TH7, and TH8) of connectors TH6/TH7) on the outdoor controller circuit Abnormal if open or short is detected Outdoor controller circuit board: board.
  • Page 23 Check Code Abnormal point and detection method Judgment and action Case To find out the details about U9 error, turn ON SW2-1, 2-2, 2-3, 2-4, 2-5 and 2-6 when U9 error occurs. Detailed To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. codes Refer to "9-7.
  • Page 24 Abnormal point and detection method Judgment and action Check Code Case 1 Defective outdoor fan (fan Overheat protection 1 Check outdoor unit air passage. motor) or short cycle of outdoor Abnormal if outdoor pipe thermistor (TH3) 23 Turn the power off and on again to check unit during cooling operation the check code.
  • Page 25 Abnormal point and detection method Judgment and action Case Check code Remote controller transmission error (E3)/signal receiving error (E5) 1 2 remote controllers are set as 1 Set a remote controller to main, and the 1 Abnormal if remote controller could not “main.”...
  • Page 26 Check code Abnormal point and detection method Judgment and action Case Freezing/overheating protection is working (1) Freezing protection (1) Freezing protection <Cooling mode> <Cooling mode> (1) Freezing protection 1 Reduced water flow 12 Check water piping. <Cooling mode> · Clogged filter Abnormal if plate heat exchanger pipe ·...
  • Page 27 Check code Abnormal point and detection method Judgment and action Case Abnormal pressure of pressure sensor 1 Disconnection or contact failure 1 Check connection of connector (63HS) on (63HS) of connector (63HS) on the the outdoor controller circuit board. Check Abnormal if pressure sensor (63HS) detects outdoor controller circuit board breaking of the lead wire for thermistor (63HS).
  • Page 28 9-4. HOW TO CHECK THE PARTS PUHZ-W85VHA2.UK PUHZ-W85VHA2R1.UK PUHZ-W85VHA2R3.UK PUHZ-W85VHA2-BS.UK PUHZ-W85VHA2R1-BS.UK PUHZ-W85VHA2R3-BS.UK PUHZ-W85VHA2R4.UK PUHZ-W85VHA2R5.UK PUHZ-W85VHA2R4-BS.UK PUHZ-W85VHA2R5-BS.UK Check points Parts name Thermistor (TH3) Disconnect the connector then measure the resistance with a tester. <Liquid> (At the ambient temperature of 10 to 30:) Thermistor (TH4) <Discharge>...
  • Page 29 9-4-1. Check method of DC fan motor (fan motor/outdoor controller circuit board) Notes · High voltage is applied to the connector (CNF1) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1) of the motor with the power supply on. board and fan motor.) (It may damage the outdoor controller circuit Self check...
  • Page 30 9-5. HOW TO CHECK THE COMPONENTS <Thermistor feature chart> Low temperature thermistors ••Thermistor•<Liquid>•(TH3) ••Thermistor•<Plate•Hex•liquid>•(TH6) ••Thermistor•<Ambient>•(TH7) Thermistor R0 = 15 k" ± 3% B constant = 3480 ± 2% =15exp{3480( 273+t – 273 )} 15 k" 4.3 k" 9.6 k" 3.0 k" 6.3 k"...
  • Page 31 Low temperature thermistor ••Thermistor•<Inlet•water>•(TH32) Thermistor R0 = 15 k" ± 2.5% B constant = 3450 ± 2% =15exp{3450( 273+t – 273 )} 15 k" 4.3 k" 9.6 k" 3.0 k" 6.3 k" 5.2 k" -20 -10 10 20 30 40 50 Temperature(:) <HIGH PRESSURE SENSOR>...
  • Page 32 Linear expansion valve (1) Operation summary of the linear expansion valve ••Linear•expansion•valve•opens/closes•through•stepping•motor•after•receiving•the•pulse•signal•from•the•outdoor•controller•board. ••Valve•position•can•be•changed•in•proportion•to•the•number•of•pulse•signal. <Connection between the outdoor controller board and the linear expansion valve> Outdoor controller board DC12V Gray Drive circuit Orange Yellow Black Connector LEV-A LEV-B <Output pulse signal and the valve operation> Output Output (Phase)
  • Page 33 (3) How to attach and detach the coil of linear expansion valve <Composition> Linear expansion valve is separable into the main body and the coil as shown in the diagram below. Main body Stopper Coil Lead wire <How to detach the coil> Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward.
  • Page 34 9-6. TEST POINT DIAGRAM Outdoor controller circuit board PUHZ-W85VHA2.UK PUHZ-W85VHA2R1.UK PUHZ-W85VHA2R3.UK PUHZ-W85VHA2-BS.UK PUHZ-W85VHA2R1-BS.UK PUHZ-W85VHA2R3-BS.UK PUHZ-W85VHA2R4.UK PUHZ-W85VHA2R5.UK PUHZ-W85VHA2R4-BS.UK PUHZ-W85VHA2R5-BS.UK <CAUTION> TEST POINT 1 is high voltage. (TEST POINT 1) (TEST POINT 2) (voltage between pins of C5E) S1–S2: 230 V AC...
  • Page 35 Outdoor noise filter circuit board PUHZ-W85VHA2.UK PUHZ-W85VHA2R1.UK PUHZ-W85VHA2-BS.UK PUHZ-W85VHA2R1-BS.UK PUHZ-W85VHA2R3.UK PUHZ-W85VHA2R4.UK PUHZ-W85VHA2R3-BS.UK PUHZ-W85VHA2R4-BS.UK LO, NO Voltage of 230 V AC is output. PUHZ-W85VHA2R5.UK Connect to the outdoor power PUHZ-W85VHA2R5-BS.UK circuit board (TABS, TABT) CNAC1, CNAC2 230 V AC Connect to the out-...
  • Page 36 Outdoor power circuit board PUHZ-W85VHA2.UK Brief Check of POWER MODULE PUHZ-W85VHA2R1.UK Usually, they are in a state of being short-circuited if they are broken. PUHZ-W85VHA2R3.UK Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken.
  • Page 37 Active filter module PUHZ-W85VHA2.UK PUHZ-W85VHA2R1.UK PUHZ-W85VHA2R3.UK PUHZ-W85VHA2-BS.UK PUHZ-W85VHA2R1-BS.UK PUHZ-W85VHA2R3-BS.UK PUHZ-W85VHA2R4.UK PUHZ-W85VHA2R5.UK P *2 Connect to the outdoor power PUHZ-W85VHA2R4-BS.UK PUHZ-W85VHA2R5-BS.UK circuit board (TABP2) L1, L2 Connect to the Non-connect DCL (Reactor) Upper Lower side side Non-connect Connect to the outdoor power...
  • Page 38 9-7. OUTDOOR UNIT OPERATION MONITOR FUNCTION Operation indicator SW2: Indicator change of self diagnosis Display detail Explanation for display Unit SW2 setting 2 3 4 5 6 <Digital indicator LED3 working details> (Be sure that the 1 to 6 in the SW2 are set to OFF.) (1) Display when the power supply is ON.
  • Page 39 SW2 setting Display detail Explanation for display Unit Pipe temperature/Liquid (TH3) −40•to•90 −40•to•90 (When the coil thermistor detects 0: or below, “–” and temperature are displayed by turns.) (Example)•When•−10:; 2 3 4 5 6 0.5 s 0.5 s Discharge temperature (TH4) 3 to 217 3 to 217 (When the discharge thermistor detects 100: or...
  • Page 40 SW2 setting Display detail Explanation for display Unit Pipe temperature/Liquid (TH3) when −40•to•90 error occurred. (When the coil thermistor detects 0: or below, “–” −40•to•90 and temperature are displayed by turns.) (Example)•When•−15:; 0.5 s 0.5 s 2 3 4 5 6 Discharge temperature (TH4) when error 3 to 217 occurred.
  • Page 41 SW2 setting Display detail Explanation for display Unit Outdoor unit setting information • The tens digit (Total display for applied setting) Setting details Display details H·P / Cooling only 0 : H·P 1 : Cooling only Single phase / 3 phase 0 : Single phase 2 : 3 phase Code •...
  • Page 42 SW2 setting Display detail Explanation for display Unit 0 to 130 Sub cool (SC) (When the SC is 100°C or more, hundreds digit, tens 0 to 130 digit and ones digit are displayed by turns.) °C Cooling: SC = T −TH3 63HS Heating: SC = T...
  • Page 43 SW2 setting Display detail Explanation for display Unit When no error history, “0” and “– –“ are displayed by Error history (3) (Oldest) turns. Faulty unit number and check code are displayed alternately. Code display 2 3 4 5 6 3: Liquid thermistor (TH3) Error thermistor display 3: Water inlet temp.
  • Page 44 Explanation for display Unit SW2 setting Display detail −40•to•200 Outdoor heat sink temperature (TH8) when error occurred (When the temperature is 0°C or less, “–” and −40•to•200 temperature are displayed by turns.) (When the temperature is 100°C or more, hundreds 2 3 4 5 6 digit, tens digit and ones digit are displayed by turns.)
  • Page 45 SW2 setting Display detail Explanation for display Unit Requested capacity step (Q STEP) 0 to 7 0 to 7 Step 2 3 4 5 6 3 to 217 <VHA2(-BS)> Comp. surface temperature (TH33) −52•to•221•<VHA2R1/R3/R4/R5(-BS)> 3 to 217 <VHA2(-BS)> (When the temperature is 100: or more, the −52•to•221•<VHA2R1/R3/R4/R5(-BS)>...
  • Page 46 9-8. 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 Remarks (Display range)
  • Page 47 Description Request content Unit Remarks (Display range) Outdoor unit-Control state – Refer to 9-8-1.Detail Contents in Request Code. Compressor-Frequency control state Refer to 9-8-1.Detail Contents in Request Code. – Outdoor unit-Fan control state Refer to 9-8-1.Detail Contents in Request Code. –...
  • Page 48 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 49 9-8-1. Detail Contents in Request Code [Operation state] (Request code :" 0") Relay output state Power currently Data display Display Compressor 4-way valve Solenoid valve supplied to compressor – – – – Relay output state Operation mode Operation mode Display Operation mode STOP •...
  • Page 50 [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 4-way valve Compressor Display warming up [Error content (U9)] (Request code :"55 ") Data display Error content 1 Error content 2 Error content...
  • Page 51 [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/ Display cooling only 3-phase Heat pump Single-phase Cooling only Heat pump 3-phase...
  • Page 52 OCH465D...
  • Page 53 9-9. FUNCTION OF SWITCHES PUHZ-W85VHA2.UK PUHZ-W85VHA2R1.UK PUHZ-W85VHA2R3.UK PUHZ-W85VHA2-BS.UK PUHZ-W85VHA2R1-BS.UK PUHZ-W85VHA2R3-BS.UK PUHZ-W85VHA2R4.UK PUHZ-W85VHA2R5.UK PUHZ-W85VHA2R4-BS.UK PUHZ-W85VHA2R5-BS.UK Switch Selection Effective timing Default Function Function details (SW1, 8)/ setting* Mark No. Note (SW6) Switch ON to manual defrost When compressor Manual ON to start...

  • Page 54: Disassembly Procedure

    DISASSEMBLY PROCEDURE PUHZ-W85VHA2.UK PUHZ-W85VHA2R1.UK PUHZ-W85VHA2-BS.UK PUHZ-W85VHA2R1-BS.UK PUHZ-W85VHA2R3.UK PUHZ-W85VHA2R4.UK PUHZ-W85VHA2R3-BS.UK PUHZ-W85VHA2R4-BS.UK OPERATING PROCEDURE PHOTOS 1. Removing the service panel and top panel Top panel fixing screws Photo 1 Top panel (1) Remove 3 screws (5 × 12) and slide the hook on the right downward to remove the service panel.
  • Page 55 OPERATING PROCEDURE PHOTOS Photo 5 4. Removing the thermistor <Plate HEX Liquid> (TH6) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connector TH7/6 (red) on the controller Plate HEX liquid Liquid thermistor circuit board.
  • Page 56 OPERATING PROCEDURE PHOTOS 8. Removing the solenoid valve coil <4-way valve> (21S4) Photo 9 linear expansion valve coil (LEV (A), LEV (B)) and solenoid valve coil <Bypass valve> (SV) 4-way 4-way valve LEV-A (1) Remove the service panel. (See Photo 1) valve coil (21S4) (2) Remove the top panel.
  • Page 57 OPERATING PROCEDURE PHOTOS 11. Removing the bypass valve Photo 11 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the side panel (R). (Refer to Procedure 7) Solenoid LEV-A 4-way valve LEV-B (4) Remove the solenoid valve coil <Bypass valve>.
  • Page 58 OPERATING PROCEDURE PHOTOS Photo 12 Terminal cover 14. Removing the compressor (MC) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) Lead wire for (3) Remove the front cover panel. compressor (4) Remove the side panel (R). (Refer to Procedure 7) (5) Remove the electrical parts box.
  • Page 59 OPERATING PROCEDURE PHOTOS 17. Removing the controller circuit board (C.B.): Figure 1 Figure 1 Active filter module (ACTM) (1) Remove all lead wire connectors on controller circuit board (C.B.). CNF1, CNDC, CNAC, CN2, CN4, CN52C, Electrical Power circuit board (P.B.) 21S4, SV2, 63H, 63HS, LEV-A, LEV-B, parts box TH32, TH7/6, TH3, TH4...
  • Page 60 PUHZ-W85VHA2R5.UK PUHZ-W85VHA2R5-BS.UK OPERATING PROCEDURE PHOTOS Top panel fixing screws Photo 1 1. Removing the service panel and top panel Top panel (1) Remove 3 screws (5 × 12) and slide the hook on the right downward to remove the service panel. (2) Remove screws (3 for front, 3 for rear/5 ×...
  • Page 61 OPERATING PROCEDURE PHOTOS Photo 5 4. Removing the thermistor <Plate HEX Liquid> (TH6) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connector TH7/6 (red) on the controller Plate HEX liquid Liquid thermistor circuit board.
  • Page 62 OPERATING PROCEDURE PHOTOS 8. Removing the solenoid valve coil <4-way valve> (21S4) Photo 9 linear expansion valve coil (LEV (A), LEV (B)) and solenoid 4-way 4-way valve valve coil <Bypass valve> (SV) valve coil (21S4) LEV-A (1) Remove the service panel. (See Photo 1) (2) Remove the top panel.
  • Page 63 OPERATING PROCEDURE PHOTOS 11. Removing the bypass valve Photo 11 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) 4-way (3) Remove the side panel (R). (Refer to Procedure 7) valve coil (21S4) (4) Remove the solenoid valve coil <Bypass valve>.
  • Page 64 OPERATING PROCEDURE PHOTOS Photo 12 Terminal cover 14. Removing the compressor (MC) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) Lead wire for (3) Remove the front cover panel. compressor (4) Remove the side panel (R). (Refer to Procedure 7) (5) Remove the electrical parts box.
  • Page 65 OPERATING PROCEDURE PHOTOS 17. Removing the controller circuit board (C.B.): Figure 1 Figure 1 Active filter module (ACTM) (1) Remove all lead wire connectors on controller circuit board (C.B.). CNF1, CNDC, CNAC, CN2, CN4, CN52C, Electrical Power circuit board (P.B.) 21S4, SV2, 63H, 63HS, LEV-A, LEV-B, parts box TH32, TH7/6, TH3, TH4...
  • Page 66 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2009 MITSUBISHI ELECTRIC CORPORATION Distributed in Nov. 2015 No. OCH465 REVISED EDITION-D Distributed in Aug. 2015 No. OCH465 REVISED EDITION-C Distributed in Nov. 2014 No. OCH465 REVISED EDITION-B New publication, effective Nov.

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