Mitsubishi Electric PUHZ-W50VHA-BS Service Manual
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Mitsubishi Electric PUHZ-W50VHA-BS Service Manual

Air to water heat pump
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Table of Contents

See also: Homeowner's Manual
AIR TO WATER HEAT PUMP

SERVICE MANUAL

[Model name]
PUHZ-W50VHA
PUHZ-W85VHA
PUHZ-HW112YHA
PUHZ-HW112YHA2
PUHZ-HW140VHA
PUHZ-HW140YHA
PUHZ-HW140VHA2
PUHZ-HW140YHA2
[Service Ref.]
Refer to page 2.
PUHZ-W85VHA(R1)
PUHZ-W85VHA(R1)-BS
Note:
• This manual describes only service data of outdoor unit.
• RoHS compliant products have mark on the spec name plate.
R410A
PUHZ-W50VHA-BS
PUHZ-W85VHA-BS
PUHZ-HW112YHA-BS
PUHZ-HW112YHA2-BS
PUHZ-HW140VHA-BS
PUHZ-HW140YHA-BS
PUHZ-HW140VHA2-BS
PUHZ-HW140YHA2-BS
CONTENTS
1. TECHNICAL CHANGES .................................. 3
2. SAFETY PRECAUTION ................................... 4
3. SPECIFICATIONS ............................................ 7
4. DATA ............................................................. 24
5. OUTLINES AND DIMENSIONS ..................... 27
6. WIRING DIAGRAM ........................................ 30
7. WIRING SPECIFICATIONS ........................... 40
8. REFRIGERANT SYSTEM DIAGRAM ............... 41
9. TROUBLESHOOTING ................................... 43
10. DISASSEMBLY PROCEDURE ...................... 82
PARTS CATALOG (OCB439)
August 2012
No. OCH439
REVISED EDITION-H
Revision:
• PUHZ-W50VHAR2(-BS),
PUHZ-HW112YHA2R3(-BS),
PUHZ-HW140YHA2R3(-BS)
and PUHZ-HW140VHA2R3(-BS)
have been added in REVISED
EDITION-H.
• Some descriptions have been
modified.
• Please void OCH439 REVISED
EDITION-G.
Table of Contents
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Summary of Contents for Mitsubishi Electric PUHZ-W50VHA-BS

  • Page 1: Service Manual

    AIR TO WATER HEAT PUMP August 2012 No. OCH439 REVISED EDITION-H SERVICE MANUAL R410A [Model name] Revision: PUHZ-W50VHA PUHZ-W50VHA-BS • PUHZ-W50VHAR2(-BS), PUHZ-HW112YHA2R3(-BS), PUHZ-HW140YHA2R3(-BS) PUHZ-W85VHA-BS PUHZ-W85VHA and PUHZ-HW140VHA2R3(-BS) have been added in REVISED PUHZ-HW112YHA-BS PUHZ-HW112YHA EDITION-H. • Some descriptions have been modified.
  • Page 2 [Service Ref.] PUHZ-W50VHA PUHZ-W50VHA-BS PUHZ-W50VHAR1-BS PUHZ-W50VHAR1 PUHZ-W50VHAR2 PUHZ-W50VHAR2-BS PUHZ-W85VHA PUHZ-W85VHA-BS PUHZ-W85VHAR1 PUHZ-W85VHAR1-BS PUHZ-HW112YHA PUHZ-HW112YHA-BS PUHZ-HW112YHA2 PUHZ-HW112YHA2-BS PUHZ-HW112YHA2R1-BS PUHZ-HW112YHA2R1 PUHZ-HW112YHA2R3 PUHZ-HW112YHA2R3-BS PUHZ-HW140VHA PUHZ-HW140VHA-BS PUHZ-HW140YHA PUHZ-HW140YHA-BS PUHZ-HW140VHA2 PUHZ-HW140VHA2-BS PUHZ-HW140VHA2R1 PUHZ-HW140VHA2R1-BS PUHZ-HW140VHA2R2-BS PUHZ-HW140VHA2R3 PUHZ-HW140YHA2 PUHZ-HW140VHA2R3-BS PUHZ-HW140YHA2R1 PUHZ-HW140YHA2-BS PUHZ-HW140YHA2R3 PUHZ-HW140YHA2R1-BS PUHZ-HW140YHA2R3-BS OCH439H...

  • Page 3: Technical Changes

    TECHNICAL CHANGES PUHZ-W50VHAR1(-BS) PUHZ-W50VHAR2(-BS) 1. Plate heat exchanger has been changed. 2. Outdoor controller board has been changed. PUHZ-HW112YHA2R1(-BS) PUHZ-HW112YHA2R3(-BS) PUHZ-HW140YHA2R1(-BS) PUHZ-HW140YHA2R3(-BS) PUHZ-HW140VHA2R1 PUHZ-HW140VHA2R3 PUHZ-HW140VHA2R2-BS PUHZ-HW140VHA2R3-BS 1. Heat exchanger has been changed. 2. Outdoor controller board has been changed. 3. Outdoor power board has been changed. (Only HW140V) 4.

  • Page 4: 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. • Prepare the proper tools. • Prepare the proper protectors. • Provide adequate ventilation. • After stopping the operation of the air conditioner, turn off the power-supply breaker. •...
  • Page 5 [1] Cautions for service (1) Perform service after recovering the refrigerant left in the 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 6 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 Charge hose and operation check...

  • Page 7: Specifications

    SPECIFICATIONS 3-1. SPECIFICATIONS PUHZ-W50VHA PUHZ-W50VHA-BS PUHZ-W50VHAR1 PUHZ-W50VHAR1-BS 1 , 230V, 50Hz Nominal water flow rate (Heating mode) L/min 14.3 Heating(A7/W35) y t i (Min.1.50 ) 5.00 °C Heating 4.10 (A7/W35) °C 1.22 l n i °C (Min.1.50 ) 5.00 Heating...
  • Page 8 PUHZ-W50VHAR2 PUHZ-W50VHAR2-BS 1 , 230V, 50Hz Nominal water flow rate (Heating mode) L/min 14.3 Heating(A7/W35) Heating y t i (Min.1.50 ) 5.00 °C 4.10 (A7/W35) °C 1.22 l n i °C (Min.1.50 ) 5.00 Heating y t i Heating(A2/W35) 3.13 °C (A2/W35) 1.60...
  • Page 9 PUHZ-W85VHA PUHZ-W85VHA-BS PUHZ-W85VHAR1 PUHZ-W85VHAR1-BS 1 , 230V, 50Hz Nominal water flow rate (Heating mode) L/min 25.8 Heating(A7/W35) y t i (Min.2.70 ) 9.00 Heating 3.85 (A7/W35) 2.34 l n i (Min.2.60 ) 8.50 Heating y t i Heating(A2/W35) 2.95 (A2/W35) 2.88 Pressure difference (water circuit) l n i...
  • Page 10 PUHZ-HW112YHA PUHZ-HW112YHA-BS 3 , 400V, 50Hz Nominal water flow rate (Heating mode) L/min 32.1 Heating(A7/W35) y t i (Min. 3.40 ) 11.20 Heating (A7/W35) 4.24 2.64 l n i (Min. 3.40 ) 11.20 Heating y t i Heating(A2/W35) 3.01 (A2/W35) 3.72 Pressure difference (water circuit) l n i...
  • Page 11 PUHZ-HW140VHA PUHZ-HW140VHA-BS 1 , 230V, 50Hz Nominal water flow rate (Heating mode) L/min 40.1 Heating(A7/W35) y t i (Min. 4.20 ) 14.00 Heating 4.19 (A7/W35) 3.34 l n i y t i (Min. 4.20 ) 14.00 Heating Heating(A2/W35) 2.69 (A2/W35) 5.21 Pressure difference (water circuit) l n i...
  • Page 12 PUHZ-HW140YHA PUHZ-HW140YHA-BS 3 , 400V, 50Hz Nominal water flow rate (Heating mode) L/min 40.1 Heating(A7/W35) (Min. 4.20 ) 14.00 Heating y t i 4.19 (A7/W35) 3.34 l n i Heating y t i (Min. 4.20 ) 14.00 Heating(A2/W35) 2.69 (A2/W35) 5.21 Pressure difference (water circuit) l n i...
  • Page 13 PUHZ-HW112YHA2 PUHZ-HW112YHA2-BS , 400V, 50Hz Nominal water flow rate (Heating mode) L/min 32.1 Heating(A7/W35) y t i (Min. 3.40 ) 11.20 Heating (A7/W35) 4.42 2.53 l n i (Min. 3.40 ) 11.20 Heating y t i Heating(A2/W35) (A2/W35) 3.11 3.60 Pressure difference (water circuit) l n i /+35...
  • Page 14 PUHZ-HW140VHA2 PUHZ-HW140VHA2-BS PUHZ-HW140VHA2R1-BS 1 , 230V, 50Hz Nominal water flow rate (Heating mode) L/min 40.1 Heating(A7/W35) (Min. 4.20 ) 14.00 Heating y t i 4.25 (A7/W35) 3.29 l n i y t i (Min. 4.20 ) 14.00 Heating Heating(A2/W35) 3.11 (A2/W35) 4.50 Pressure difference (water circuit)
  • Page 15 PUHZ-HW140YHA2 PUHZ-HW140YHA2-BS 3 , 400V, 50Hz Nominal water flow rate (Heating mode) L/min 40.1 Heating(A7/W35) (Min. 4.20 ) 14.00 Heating y t i 4.25 (A7/W35) 3.29 l n i Heating y t i (Min. 4.20 ) 14.00 Heating(A2/W35) 3.11 (A2/W35) 4.50 Pressure difference (water circuit) l n i...
  • Page 16 PUHZ-HW112YHA2R1 PUHZ-HW112YHA2R1-BS , 400V, 50Hz Nominal water flow rate (Heating mode) L/min 32.1 Heating(A7/W35) y t i (Min. 3.40 ) 11.20 Heating (A7/W35) 4.42 2.53 l n i (Min. 3.40 ) 11.20 Heating y t i Heating(A2/W35) (A2/W35) 3.11 3.60 Pressure difference (water circuit) l n i /+35...
  • Page 17 PUHZ-HW112YHA2R3 PUHZ-HW112YHA2R3-BS , 400V, 50Hz Nominal water flow rate (Heating mode) L/min 32.1 Heating(A7/W35) y t i (Min. 3.40 ) 11.20 Heating (A7/W35) 4.42 2.53 l n i (Min. 3.40 ) 11.20 Heating y t i Heating(A2/W35) (A2/W35) 3.11 3.60 Pressure difference (water circuit) l n i /+35...
  • Page 18 PUHZ-HW140VHA2R1 PUHZ-HW140VHA2R2-BS 1 , 230V, 50Hz Nominal water flow rate (Heating mode) L/min 40.1 Heating(A7/W35) (Min. 4.20 ) 14.00 Heating y t i 4.25 (A7/W35) 3.29 l n i Heating y t i (Min. 4.20 ) 14.00 Heating(A2/W35) 3.11 (A2/W35) 4.50 Pressure difference (water circuit) l n i...
  • Page 19 PUHZ-HW140VHA2R3 PUHZ-HW140VHA2R3-BS 1 , 230V, 50Hz Nominal water flow rate (Heating mode) L/min 40.1 Heating(A7/W35) (Min. 4.20 ) 14.00 Heating y t i 4.25 (A7/W35) 3.29 l n i Heating y t i (Min. 4.20 ) 14.00 Heating(A2/W35) 3.11 (A2/W35) 4.50 Pressure difference (water circuit) l n i...
  • Page 20 PUHZ-HW140YHA2R1 PUHZ-HW140YHA2R1-BS 3 , 400V, 50Hz Nominal water flow rate (Heating mode) L/min 40.1 Heating(A7/W35) (Min. 4.20 ) 14.00 Heating y t i 4.25 (A7/W35) 3.29 l n i Heating y t i (Min. 4.20 ) 14.00 Heating(A2/W35) 3.11 (A2/W35) 4.50 Pressure difference (water circuit) l n i...
  • Page 21 PUHZ-HW140YHA2R3 PUHZ-HW140YHA2R3-BS 3 , 400V, 50Hz Nominal water flow rate (Heating mode) L/min 40.1 Heating(A7/W35) (Min. 4.20 ) 14.00 Heating y t i 4.25 (A7/W35) 3.29 l n i Heating y t i (Min. 4.20 ) 14.00 Heating(A2/W35) 3.11 (A2/W35) 4.50 Pressure difference (water circuit) l n i...
  • Page 22 3-2. AVAILABLE RANGE (WATER FLOW RATE, RETURN WATER TEMP.) Note: If using the unit out of the available range, the parts of unit might be damaged. • PUHZ-W50VHA(-BS) 19.0 • PUHZ-W50VHAR1(-BS) Available range 17.0 • PUHZ-W50VHAR2(-BS) 15.0 13.0 11.0 11.0...
  • Page 23 • PUHZ-W50VHA(-BS) 19.0 • PUHZ-W50VHAR1(-BS) Available range 17.0 • PUHZ-W50VHAR2(-BS) 15.0 13.0 11.0 10.0 11.0 12.0 13.0 14.0 Water flow rate [L/min] Table 4 15.0 • PUHZ-W85VHA(-BS) 14.0 • PUHZ-W85VHAR1(-BS) Available range 13.0 12.0 11.0 10.0 20.0 10.0...
  • Page 24 DATA 4-1. NOISE CRITERION CURVES PUHZ-W50VHA(-BS) PUHZ-W50VHAR1(-BS) SPL(dB) MODE LINE PUHZ-W50VHAR2(-BS) MICROPHONE COOLING HEATING UNIT 1.5m NC-70 NC-60 GROUND NC-50 NC-40 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS NOISE 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz PUHZ-HW140VHA2R2-BS PUHZ-HW112YHA(-BS) PUHZ-HW140VHA2R3(-BS) PUHZ-HW112YHA2(-BS) PUHZ-HW140YHA2(-BS)
  • Page 25 4-2. STANDARD OPERATION DATA Cooling Heating Cooling Heating Cooling Heating Cooling Heating Mode (A35/W7) (A7/W35) (A35/W7) (A7/W35) (A35/W7) (A7/W35) (A35/W7) (A7/W35) Capacity 4,500 5,000 7,500 9,000 10,000 11,200 12,500 14,000 Input 1.52 1.21 3.12 2.31 3.67 2.63 4.80 3.32 PUHZ-HW140VHA/ Outdoor unit PUHZ-W50VHA PUHZ-W85VHA PUHZ-HW112YHA...
  • Page 26 Cooling Heating Cooling Heating Mode (A35/W7) (A7/W35) (A35/W7) (A7/W35) Capacity 10,000 11,200 12,500 14,000 Input 3.60 2.53 5.00 3.29 PUHZ-HW140VHA2/ Outdoor unit PUHZ-HW112YHA2 PUHZ-HW140YHA2 Phase, Hz 3, 50 1 / 3, 50 Voltage 230 / 400 Current 22.2 / 7.6 14.4 / 5.0 Discharge pressure 2.63...

  • Page 27: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit: mm PUHZ-W50VHA(-BS) PUHZ-W50VHAR1(-BS) PUHZ-W50VHAR2(-BS) OCH439H...
  • Page 28 Unit: mm PUHZ-W85VHA(-BS) PUHZ-W85VHAR1(-BS) OCH439H...
  • Page 29 Unit: mm PUHZ-HW112YHA(-BS) PUHZ-HW112YHA2(-BS) PUHZ-HW112YHA2R1(-BS) PUHZ-HW112YHA2R3(-BS) PUHZ-HW140VHA2(-BS) PUHZ-HW140VHA2R1(-BS) PUHZ-HW140VHA2R2-BS PUHZ-HW140VHA2R3(-BS) PUHZ-HW140YHA2(-BS) PUHZ-HW140YHA2R1(-BS) PUHZ-HW140YHA2R3(-BS) OCH439H...

  • Page 30: Wiring Diagram

    WIRING DIAGRAM PUHZ-W50VHA(-BS) PUHZ-W50VHAR1(-BS) SYMBOL NAME SYMBOL NAME Terminal Block PFC/IPM Power Module Motor for Compressor N.F. Noise Filter Circuit Board Fan Motor LI,LO Connection Terminal 21S4 Solenoid Valve NI,NO Connection Terminal...
  • Page 31 PUHZ-W50VHAR2(-BS) SYMBOL NAME SYMBOL NAME Terminal Block PFC/IPM Power Module Motor for Compressor N. F. Noise Filter Circuit Board Fan Motor Connection Terminal LI, LO 21S4 Solenoid Valve(Four-Way Valve) Connection Terminal...
  • Page 32 PUHZ-W85VHA(-BS) SYMBOL NAME SYMBOL NAME Terminal Block Flow temp. controller> DS2, DS3 Diode bridge Motor for Compressor Power Module Fan Motor N.F. Noise Filter Circuit Board 21S4 Solenoid Valve Connection Terminal ...
  • Page 33 PUHZ-W85VHAR1(-BS) SYMBOL NAME SYMBOL NAME Terminal Block TABP1/P2 Flow temp. controller> TABN1/N2 Connection Terminal < DC Voltage> Motor for Compressor DS2, DS3 Diode bridge Fan Motor Power Module 21S4 Solenoid Valve N.F.
  • Page 34 PUHZ-HW140VHA(-BS) SYMBOL NAME P.B. Power Circuit Board U/V/W Terminal Block Flow Temp. controller-Outdoor> Connection Terminal Motor for Compressor Connection Terminal MF1,MF2 Fan Motor DCL1,DCL2 Connection Terminal 21S4 Solenoid Valve IGBT Power Module High Pressure Switch Connection Terminal...
  • Page 35 PUHZ-HW112YHA(-BS) PUHZ-HW140YHA(-BS) SYMBOL NAME SYMBOL NAME Terminal Block N.F. Noise Filter Circuit Board Terminal Block controller-Outdoor> LO1/LO2/LO3/NO Connection Terminal Motor for Compressor GD1,GD3 Connection Terminal MF1,MF2 Fan Motor CONV.B. Converter Circuit Board 21S4 Solenoid Valve...
  • Page 36 PUHZ-HW112YHA2(-BS) PUHZ-HW112YHA2R1(-BS) PUHZ-HW140YHA2(-BS) PUHZ-HW140YHA2R1(-BS) SYMBOL NAME SYMBOL NAME Terminal Block < Power Supply> N.F. Noise Filter Circuit Board Terminal Block < Interface unit /Flow Temp. Connection Terminal LI1/LI2/LI3/NI controller-Outdoor> LO1/LO2/LO3/NO Connection Terminal Motor for Compressor GD1,GD3 Connection Terminal ...
  • Page 37 PUHZ-HW112YHA2R3(-BS) PUHZ-HW140YHA2R3(-BS) 1 MODEL SELECT SYMBOL NAME SYMBOL NAME The black square ( ) indicates a switch position. Terminal Block N. F. Noise Filter Circuit Board MODEL SW5-6 Terminal Block LI1, LI2, LI3, NI Connection Terminal 112Y Motor for Compressor LO1, LO2, LO3, NO Connection Terminal...
  • Page 38 PUHZ-HW140VHA2(-BS) PUHZ-HW140VHA2R1(-BS) PUHZ-HW140VHA2R2-BS SYMBOL NAME SYMBOL NAME Terminal Block Flow Temp. controller-Outdoor> DCL1,DCL2 Connection Terminal < Reactor > Motor for Compressor Power Module IGBT MF1,MF2 Fan Motor Connection Terminal < Ground > EI,E2,E3,E4 21S4 Solenoid Valve ...
  • Page 39 PUHZ-HW140VHA2R3(-BS) 1 MODEL SELECT SYMBOL NAME SYMBOL NAME The black square ( ) indicates a switch position. Terminal Block Connection Terminal MODEL SW5-6 Motor for Compressor DCL1, DCL2 Connection Terminal 140V MF1, MF2 Fan Motor IGBT Power Module 1 2 3 4 5 6 7 8 1 2 3 4 5 6 21S4...

  • Page 40: Wiring Specifications

    WIRING SPECIFICATIONS FIELD ELECTRICAL WIRING (power wiring specifications) t i n 85 V 140 V 112 Y,140 Y Outdoor unit power supply ~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V 3N~ (3phase), 50 Hz, 400 V t i n c r i t i u...

  • Page 41: Refrigerant System Diagram

    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) Plate HEX Plate Heat Exchanger ACH30 - 30 (Alfa Laval)(*1) /MWA1-28LM (MITSUBISHI)(*2) /...
  • Page 42 Refrigerant flow in heating Refrigerant flow in cooling Detail Symbol Part name COMP Compressor DC inverter scroll compressor (Mitsubishi Electric Corporation) H/P SW High pressure switch (63H) For protection (OFF:4.15MPa) L/P SW Low pressure switch (63L) For protection (OFF:-0.03MPa) Plate HEX...

  • Page 43: Troubleshooting

    TROUBLESHOOTING 9-1. TROUBLESHOOTING Present and past error codes are logged and displayed on the control board of outdoor unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring at service, are summarized in the table below. Check the contents below before investigating details.
  • Page 44 9-3. SELF-DIAGNOSIS ACTION TABLE Abnormal point and detection method Judgment and action Error Code Case 1 No voltage is supplied to terminal 1 Check following items. block (TB1) of outdoor unit. a) Power supply breaker a) Power supply breaker is turned off.
  • Page 45 Abnormal point and detection method Case Judgment and action Error Code 1 Disconnection or contact failure 1 Check connection of 63H connector on 63H connector open Abnormal if 63H connector circuit is open of 63H connector on outdoor outdoor controller circuit board. for 3 minutes continuously from being controller circuit board Refer to 9-6.
  • Page 46 Abnormal point and detection method Judgment and action Error Code Case 1 Decreased water flow 1~5 Check water circuit and repair the defect. High pressure (High-pressure switch 2 Clogged filter of water pipe 63H operated) 3 Dirt of plate heat exchanger Abnormal if high-pressure switch 63H oper- ated ( w ) during compressor operation.
  • Page 47 Abnormal point and detection method Case Judgment and action Error Code Open/short of outdoor unit thermistors 1 Disconnection or contact failure 1 Check connection of connector (TH3, TH32, (TH3, TH32, TH33, TH6, TH7, and TH8) of connectors TH33, TH6/TH7) on the outdoor controller circuit Abnormal if open or short is detected Outdoor controller circuit board: board.
  • Page 48 Abnormal point and detection method Case Judgment and action Error Code Overvoltage or voltage shortage and 1 Check the facility of power supply. 1 Decrease of power supply synchronous signal to main circuit voltage 2 Correct the wiring (U 2 Disconnection of compressor W phase) to com- •...
  • Page 49 Abnormal point and detection method Judgment and action Error Code Case Current sensor error or input current error 1 Disconnection of compressor 1 Correct the wiring (U W phase) to com- • • · Abnormal if current sensor detects –1.0 A wiring pressor.
  • Page 50 Abnormal point and detection method Judgment and action Error Code Case Remote controller transmission error 1 2 remote controllers are set as 1 Set a remote controller to main, and the (E3)/signal receiving error (E5) 1 Abnormal if remote controller could not find “main.”...
  • Page 51 Abnormal point and detection method Judgment and action Error Code Case Freezing/overheating protection is working (1) Freezing protection (1) Freezing protection (1) Freezing protection 1 Reduced water flow 12 Check water piping. Abnormal if plate heat exchanger pipe ·...
  • Page 52 Abnormal point and detection method Judgment and action Error Code Case Inlet water temperature 1 Reduced water flow 12 Check water piping. Abnormal if the following conditions are · Clogged filter detected for continuously 10 seconds. · Leak of water 1.
  • Page 53 Check method of DC fan motor (fan motor / outdoor controller circuit board) Notes · High voltage is applied to the connector (CNF1, 2) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1, 2) of the motor with the power supply on. (It may damage the outdoor controller circuit board and fan motor.) Self check Symptom: The outdoor fan does not run.
  • Page 54 9-5. HOW TO CHECK THE COMPONENTS Low temperature thermistors • Thermistor (TH3) • Thermistor (TH6) • Thermistor (TH7) • Thermistor (TH33 for HW112,140) Thermistor R0 = 15k' ± 3% B constant = 3480 ±...
  • Page 55 Low temperature thermistor • Thermistor (TH32) Thermistor R0 = 15k' ± 2.5% B constant = 3450 ± 2% =15exp{3450( 273+t – 273 )} 15k' 4.3k' 9.6k' 3.0k' 6.3k' 5.2k' -20 -10 10 20 30 40 50 Temperature( ) ...
  • Page 56 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. ...
  • Page 57 (3) How to attach and detach the coil of linear expansion valve Linear expansion valve is separable into the main body and the coil as shown in the diagram below. Main body Stopper Coil Lead wire 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 58 9-6. TEST POINT DIAGRAM TEST POINT 1 is high voltage. Outdoor controller circuit board PUHZ-W50VHA(-BS) PUHZ-W50VHAR1(-BS) PUHZ-W50VHAR2(-BS) PUHZ-W85VHA(-BS) PUHZ-W85VHAR1(-BS) (TEST POINT 2) CNDC DC 280 V -380 V (voltage between pins of High pres- Connect from outdoor C6B): DC 15 V sure switch power circuit board.
  • Page 59 TEST POINT 1 is high voltage. Outdoor controller circuit board PUHZ-HW112YHA(-BS) PUHZ-HW112YHA2(-BS) PUHZ-HW112YHA2R1(-BS) PUHZ-HW140YHA(-BS) PUHZ-HW140YHA2(-BS) PUHZ-HW140YHA2R1(-BS) PUHZ-HW140VHA(-BS) PUHZ-HW140VHA2(-BS) PUHZ-HW140VHA2R1(-BS) Operation monitor function Forced defrost, detect history record reset CNDM 1 to 2: Function switch Input of low-level (HW·HA2 only) sound priority mode Model select CN52C...
  • Page 60 TEST POINT 1 is high voltage. Outdoor controller circuit board PUHZ-HW112YHA2R3(-BS) PUHZ-HW140YHA2R3(-BS) PUHZ-HW140VHA2R3(-BS) Forced defrost, detect Function switch Operation monitor history record reset function Function switch (HW·HA2 only) CNDM 1 to 2: Input of low-level sound priority mode CN52C Model select Connect to the power circuit board (CN52C)
  • Page 61 Outdoor noise filter circuit board PUHZ-W50VHA(-BS) PUHZ-W50VHAR1(-BS) PUHZ-W50VHAR2(-BS) EI, E2 Connect to the earth Connect to the earth CNAC1, CNAC2 230 V AC (Connect to the out- door controller cir- cuit board (CNAC)) Primary current (Connect to the outdoor power circuit board (CN5)) CN52C 52C relay signal...
  • Page 62 Outdoor noise filter circuit board LO, NO PUHZ-W85VHA(-BS) Voltage of 230 V AC is output. Connect to the outdoor power PUHZ-W85VHAR1(-BS) circuit board (TABS, TABT). CNAC1, CNAC2 230 V AC Connect to the out- door controller cir- cuit board (CNAC). Connect to the earth.
  • Page 63 Outdoor noise filter circuit board PUHZ-HW112YHA(-BS) PUHZ-HW112YHA2(-BS) PUHZ-HW112YHA2R1(-BS) PUHZ-HW140YHA(-BS) PUHZ-HW140YHA2(-BS) PUHZ-HW140YHA2R1(-BS) LI1, LI2, LI3, NI POWER SUPPLY LI1-LI2/LI-LI3/LI3-LI1 : AC400V input LI1-NI/LI2-NI/LI3-NI : AC230V input (Connect to the terminal block (TB1)) Connect to the earth CNAC1, CNAC2 AC230V (Connect to the outdoor controller Connect to the earth circuit board (CNAC))
  • Page 64 Outdoor noise filter circuit board PUHZ-HW112YHA2R3(-BS) PUHZ-HW140YHA2R3(-BS) LI1, LI2, LI3, NI POWER SUPPLY LI1-LI2/LI-LI3/LI3-LI1 : AC400V input LI1-NI/LI2-NI/LI3-NI : AC230V input (Connect to the terminal block (TB1)) Connect to the earth CNAC1, CNAC2 AC230V Connect to the earth (Connect to the outdoor controller circuit board (CNAC)) CNDC...
  • Page 65 Outdoor power circuit board Brief Check of DIP-IPM and DIP-PFC W Usually, they are in a state of being short-circuited if they are broken. PUHZ-W50VHA(-BS) Measure the resistance in the following points (connectors, etc.). If they PUHZ-W50VHAR1(-BS) are short-circuited, it means that they are broken. PUHZ-W50VHAR2(-BS) 1.
  • Page 66 Outdoor power circuit board Brief Check of POWER MODULE PUHZ-W85VHA(-BS) w Usually, they are in a state of being short-circuited if they are broken. PUHZ-W85VHAR1(-BS) Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken. 1.
  • Page 67 Outdoor power circuit board PUHZ-HW140VHA(-BS) PUHZ-HW140VHA2(-BS) PUHZ-HW140VHA2R1(-BS) PUHZ-HW140VHA2R2-BS PUHZ-HW140VHA2R3(-BS) Connect to the outdoor controller circuit board (CN2) 1-5: Transmitting signal to outdoor controller circuit board (0-5 V DC) 2-5: Zero cross signal (0-5 V DC) Connect to the outdoor 3-4: 18 V DC controller circuit board (CN4) 6-5: 16 V DC 7-5: 16 V DC...
  • Page 68 Outdoor power circuit board Brief Check of POWER MODULE W Usually, they are in a state of being short-circuited if they are broken. PUHZ-HW112YHA(-BS) Measure the resistance in the following points (connectors, etc.). PUHZ-HW112YHA2(-BS) If they are short-circuited, it means that they are broken. 1.
  • Page 69 Outdoor converter circuit board PUHZ-HW112YHA(-BS) PUHZ-HW112YHA2(-BS) PUHZ-HW112YHA2R1(-BS) PUHZ-HW112YHA2R3(-BS) PUHZ-HW140YHA(-BS) PUHZ-HW140YHA2(-BS) PUHZ-HW140YHA2R1(-BS) PUHZ-HW140YHA2R3(-BS) L1-IN, N-IN L1-A1 CK-OU Connect to the noise filter Connect to the ACL1 Connect to the CK capacitor circuit board (LO1, NO) Connect to the outdoor power circuit board (CN7) L1-A2, L2-A2, L3-A2 L1-OU, L2-OU, L3-OU...
  • Page 70 Active filter module PUHZ-W85VHA(-BS) Connect to the outdoor power PUHZ-W85VHAR1(-BS) circuit board (TABP2) L1, L2 Connect to the Non-connect DCL (Reactor) Upper Lower side side Non-connect Connect to the outdoor power circuit board (TABP1) Connect to the outdoor power circuit board (CNAF) –...
  • Page 71 9-7. OUTDOOR UNIT OPERATION MONITOR FUNCTION ■ Operation indicator SW2: Indicator change of self diagnosis The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting 2 3 4 5 6 (Be sure that the 1 to 6 in the SW2 are set to OFF.) 1 second (1) Display when the power supply is ON.
  • Page 72 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature / Liquid (TH3) – 40~90 – 40~90 (When the coil thermistor detects 0: or below, “–” and temperature are displayed by turns.) (Example) When -10:;...
  • Page 73 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature/Liquid (TH3) when – 40~90 error occurred (When the coil thermistor detects 0: or below, “–” – 40~90 and temperature are displayed by turns.) (Example) When –15:;...
  • Page 74 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit • The tens digit (Total display for applied setting) Outdoor unit setting information Setting details Display details H·P / Cooling only 0 : H·P 1 : Cooling only Single phase / 3 phase 0 : Single phase 2 : 3 phase...
  • Page 75 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0~130 Sub cool (SC) (When the SC is 100°C or more, hundreds digit, tens 0~130 digit and ones digit are displayed by turns.) Cooling: SC = T -TH3 °C...
  • Page 76 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit When no error history, “0” and “– –“ are displayed by Error code history (3) (Oldest) Faulty unit number and error code are turns.
  • Page 77 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Outdoor heatsink temperature (TH8) -40~200 when error occurred. (When the temperature is 0°C or less, “–” and temperature are displayed by turns.) -40~200 (When the temperature is 100°C or more, hundreds 2 3 4 5 6...
  • Page 78 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 3~217 Comp. surface temperature (TH33) (for W50VHA(R1,R2)/W85VHAR1) (When the temperature is 100: or more, the Comp. surface temperature (TH34) hundreds digit, tens digit and ones digit are (for HW HA2R3) displayed by turns.)
  • Page 79 OCH439H...
  • Page 80 9-8. FUNCTION OF SWITCHES PUHZ-W50VHA(-BS) PUHZ-W50VHAR1(-BS) PUHZ-W50VHAR2(-BS) PUHZ-W85VHA(-BS) PUHZ-W85VHAR1(-BS) Switch Selection Effective timing Function Initial setting* Function details (SW1, 8) / Mark No. ON (with) OFF (without) Note (SW6) Switch ON to force defrosting When compressor Forced ON to start Usual setting is working in defrosting...
  • Page 81 PUHZ-HW112YHA(-BS) PUHZ-HW112YHA2(-BS) PUHZ-HW112YHA2R1(-BS) PUHZ-HW112YHA2R3(-BS) PUHZ-HW140YHA(-BS) PUHZ-HW140YHA2(-BS) PUHZ-HW140YHA2R1(-BS) PUHZ-HW140YHA2R3(-BS) PUHZ-HW140VHA(-BS) PUHZ-HW140VHA2(-BS) PUHZ-HW140VHA2R1(-BS) PUHZ-HW140VHA2R2-BS PUHZ-HW140VHA2R3(-BS) Switch Selection Function Initial setting* Function details Effective timing Mark ON (with) OFF (without) Forced defrosting ON to start usual setting Switch ON to force defrosting Always Switch ON to clear (erase) the followings: (1)Error codes and Suspension...

  • Page 82: Disassembly Procedure

    DISASSEMBLY PROCEDURE PUHZ-W50VHA(-BS) PUHZ-W50VHAR1(-BS) PUHZ-W50VHAR2(-BS) PHOTO: PUHZ-W85VHA PUHZ-W85VHA(-BS) PUHZ-W85VHAR1(-BS) OPERATING PROCEDURE PHOTOS & ILLUSTRATION Top panel fixing screws 1. Removing the service panel and top panel Photo 1 Top panel (1) Remove 3 screws (5 12) and slide the hook on the right ×...
  • Page 83 OPERATING PROCEDURE PHOTOS & ILLUSTRATION 4. Removing the thermistor (TH6) Photo 5 (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 Outdoor liquid circuit board.

  • Page 84: Heating

    OPERATING PROCEDURE PHOTOS & ILLUSTRATION 8. Removing the solenoid valve coil <4-way valve> (21S4) Photo 9 linear expansion valve coil (LEV (A), LEV (B)) and solenoid valve coil (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 85 OPERATING PROCEDURE PHOTOS & ILLUSTRATION 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 electrical parts box. (See Photo 4) Solenoid LEV-A 4-way valve LEV-B (4) Remove 3 right side panel fixing screws (5 ×...
  • Page 86 OPERATING PROCEDURE PHOTOS & ILLUSTRATION Terminal cover 14. Removing the compressor (MC) Photo 12 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) Lead wire for (3) Remove 2 screws (5 12) and remove the front cover panel. ×...
  • Page 87 No.17~22 for PUHZ-W85VHA(-BS) PUHZ-W85VHAR1(-BS) OPERATING PROCEDURE PHOTOS & ILLUSTRATION 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.) parts box...
  • Page 88 No.23~27 for PUHZ-W50VHA(-BS), PUHZ-W50VHAR1(-BS), PUHZ-W50VHAR2(-BS) OPERATING PROCEDURE PHOTOS & ILLUSTRATION 23. Removing the controller circuit board (C.B.): Figure 3, Photo 17 Power circuit board (P.B.) Figure 3 (1) Remove all lead wire connectors on controller circuit board (C.B.). Controller circuit board (P.B.) CNF1, CNDC, CNAC, CN2, CN4, CN52C, Noise filter circuit board...
  • Page 89 PUHZ-HW112YHA(-BS) PUHZ-HW112YHA2(-BS) PUHZ-HW112YHA2R1(-BS) PUHZ-HW112YHA2R3(-BS) PUHZ-HW140YHA(-BS) PUHZ-HW140YHA2(-BS) PUHZ-HW140YHA2R1(-BS) PUHZ-HW140YHA2R3(-BS) PUHZ-HW140VHA(-BS) PUHZ-HW140VHA2(-BS) PUHZ-HW140VHA2R1(-BS) PUHZ-HW140VHA2R2-BS PUHZ-HW140VHA2R3(-BS) OPERATING PROCEDURE PHOTOS & ILLUSTRATION Photo 1 Top panel fixing screws 1. Removing the service panel and top panel Top panel (1) Remove 3 service panel fixing screws (5 × 12) and slide the hook on the right downward to remove the service Service panel panel.
  • Page 90 OPERATING PROCEDURE PHOTOS & ILLUSTRATION 4. Disassembling the electrical parts box (PUHZ-HW112/140Y) Electrical (1) Disconnect all the connectors on the controller circuit parts box Photo 6 board. (2) Remove the 3 screws, screw 1, 2 and 3, that fix the plate equipped with the outdoor controller circuit board, and the electrical parts box, screw 1 from the front and the screw 2 and 3 from the bottom of the electrical parts...
  • Page 91 PHOTOS OPERATING PROCEDURE Photo 11 5. Removing the thermistor (TH6) and thermistor (TH7) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connectors, TH7/6 (red) on the controller circuit board in the electrical parts box.
  • Page 92 OPERATING PROCEDURE PHOTOS 8. Removing the 4-way valve coil (21S4), and linear expan- Photo 15 High pressure switch (63H) sion valve coil (LEV-A, LEV-B, LEV-C) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) [Removing the 4-way valve coil] (See Photo 15) (3) Remove 4-way valve solenoid coil fixing screw (M4 ×...
  • Page 93 OPERATING PROCEDURE PHOTOS Photo 18 12. Removing high pressure sensor (63HS) (1) Remove the service panel. (See Photo 1) Muffler Low pressure switch (63L) (2) Remove the top panel. (See Photo 1) (3) Pull out the lead wire of high pressure sensor. (4) Remove the 4-way valve coil.
  • Page 94 OPERATING PROCEDURE PHOTOS 14. Removing the reactors (ACL1, ACL2, ACL3) Electrical parts box Photo 20 (PUHZ-HW112/140Y) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the 6 screws, that fix the front panel and remove the front panel.
  • Page 95 OPERATING PROCEDURE PHOTOS 15. Removing the compressor (MC) Photo 23 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove 2 front cover panel fixing screws (5 × 12) and Terminal cover Pipes of power receiver Compressor (MC) remove the front cover panel.
  • Page 96 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2008 MITSUBISHI ELECTRIC CORPORATION Distributed in Aug. 2012 No. OCH439 REVISED EDITION-H Distributed in Jan. 2012 No. OCH439 REVISED EDITION-G Distributed in Dec. 2011 No. OCH439 REVISED EDITION-F Distributed in Oct.

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