Mitsubishi Electric PKFY-P32VHM-E Technical & Service Manual
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Mitsubishi Electric PKFY-P32VHM-E Technical & Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names]
PKFY-P32VHM-E
PKFY-P40VHM-E
PKFY-P50VHM-E
INDOOR UNIT
[Service Ref.]
PKFY-P32VHM-E
PKFY-P32VHM-ER1
PKFY-P40VHM-E
PKFY-P40VHM-ER1
PKFY-P50VHM-E
PKFY-P50VHM-ER1
R410A
R407C
CONTENTS
1. TECHNICAL CHANGES ......................... 2
2. SAFETY PRECAUTION .......................... 2
4. SPECIFICATION ..................................... 8
6. WIRING DIAGRAM ............................... 12
8. TROUBLESHOOTING .......................... 13
9. DISASSEMBLY PROCEDURE ............. 21
PARTS CATALOG (OCB442)
February 2009
No. OCH442
REVISED EDITION-A
R22
Revision:
• PKFY-P32/40/50VHM-ER1
are added in REVISED
EDITION-A.
• Some descriptions have
been modified.
• Plase void OCH442.
Note:
• This manual describes
only service data of the
indoor units.
• RoHS compliant products
have <G> mark on the
spec name plate.

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Summary of Contents for Mitsubishi Electric PKFY-P32VHM-E

  • Page 1: Table Of Contents

    No. OCH442 REVISED EDITION-A TECHNICAL & SERVICE MANUAL R410A R407C Indoor unit Revision: [Model names] [Service Ref.] • PKFY-P32/40/50VHM-ER1 PKFY-P32VHM-E are added in REVISED PKFY-P32VHM-E EDITION-A. PKFY-P32VHM-ER1 • Some descriptions have been modified. PKFY-P40VHM-E PKFY-P40VHM-E • Plase void OCH442. PKFY-P40VHM-ER1 Note: •...

  • Page 2: Technical Changes

    TECHNICAL CHANGES PKFY-P32VHM-E PKFY-P32VHM-ER1 PKFY-P40VHM-E PKFY-P40VHM-ER1 PKFY-P50VHM-E PKFY-P50VHM-ER1 1. INDOOR CONTROLLER BOARD (I.B.) has been changed. (S/W version up) 2. Fan speed has been changed. (4 speed → 3 speed) 3. Heat exchanger has been changed. PKFY-P32VHM-E PKFY-P40VHM-E PKFY-P50VHM-E Service parts of room temp. thermistor (TH21) has been changed. (T7W E05 202 → R01 N20 202) (The position to be attached has been changed.
  • Page 3 [2] Refrigerant recharging (1) Refrigerant recharging process 1Direct charging from the cylinder. ·R407C cylinder available on the market has a syphon pipe. ·Leave the syphon pipe cylinder standing and recharge it. (By liquid refrigerant) Unit Gravimeter (2) Recharge in refrigerant leakage case ·After recovering the all refrigerant in the unit, proceed to working.
  • Page 4 Cautions for units utilizing refrigerant R410A Use a vacuum pump with a reverse flow check Do not use the existing refrigerant piping. valve. The old refrigerant and lubricant in the existing piping Vacuum pump oil may flow back into refrigerant cycle and contains a large amount of chlorine which may cause the that can cause deterioration of refrigerant oil etc.
  • Page 5 [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) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant.

  • Page 6: Part Names And Functions

    PART NAMES AND FUNCTIONS Filter Air intake Indoor unit Vane Louver Air outlet Wireless remote controller CHECK TEST RUN display display CHECK and TEST RUN display indicate that the unit is being checked or test-run. Lights up while the signal is transmitted to the indoor unit when the button is pressed.

  • Page 7: Wired Remote Controller

    Wired remote controller “Sensor” indication Display Section Displayed when the remote controller sensor is used. Day-of-Week For purposes of this explanation, Shows the current day of the week. all parts of the display are shown as lit. During actual operation, only Time/Timer Display the relevant items will be lit.

  • Page 8: Specification

    SPECIFICATION 4-1. Specifi cations Service Ref. PKFY-P32VHM-E PKFY-P40VHM-E PKFY-P50VHM-E Power source 1-phase 220-240V 50Hz, 1-phase 220V 60Hz Cooling capacity 4,800 (Nominal) kcal/h 3,100 3,900 12,300 15,400 19,100 Btu/h 5,000 3,150 4,000 kcal/h Power input 0.03 0.03 0.03 Current input 0.30 0.30...
  • Page 9 Service Ref. PKFY-P50VHM-ER1 PKFY-P32VHM-ER1 PKFY-P40VHM-ER1 Power source 1-phase 220-240V 50Hz, 1-phase 220V 60Hz Cooling capacity 4,800 3,100 3,900 (Nominal) kcal/h 19,100 12,300 15,400 Btu/h 5,000 kcal/h 3,150 4,000 Power input 0.04 0.04 0.04 Current input 0.40 0.40 0.40 Heating capacity 3,400 4,300 5,400...

  • Page 10: Sound Levels

    4-2. Electrical parts specifi cations Service Ref. PKFY-P32VHM-E PKFY-P40VHM-E PKFY-P50VHM-E Symbol PKFY-P32VHM-ER1 PKFY-P40VHM-ER1 PKFY-P50VHM-ER1 Parts name Room temperature TH21 Resistance 0 /15k , 10 /9.6k , 20 /6.3k , 25 /5.4k , 30 /4.3k , 40 /3.0k thermistor Liquid pipe thermistor TH22 Resistance 0 /15k , 10 /9.6k , 20 /6.3k , 25 /5.4k , 30 /4.3k , 40 /3.0k...

  • Page 11: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PKFY-P32, 40, 50VHM-E Unit : mm PKFY-P32, 40, 50VHM-ER1 11 11...

  • Page 12: Wiring Diagram

    WIRING DIAGRAM PKFY-P32, 40, 50VHM-E PKFY-P32, 40, 50VHM-ER1 SYMBOL NAME SYMBOL NAME INDOOR CONTROLLER BOARD TH21 THERMISTOR ROOM TEMP. DETECTION (0°C/15kΩ, 25°C/5.4kΩ) CONNECTOR CN32 REMOTE SWITCH CN51 CENTRALLY CONTROL TH22 PIPE TEMP. DETECTION / LIQUID (0°C/15kΩ, 25°C/5.4kΩ) CN52 REMOTE INDICATION BUZZER TH23 PIPE TEMP.

  • Page 13: Refrigerant System Diagram

    Liquid pipe thermistor TH22 Heat exchanger Liquid pipe Linear expansion valve Room temparature thermistor TH21 Strainer1 (#50mesh) Strainer2 (#100mesh) Strainer (#100mesh) Unit : mm (inch) Service Ref. PKFY-P32VHM-E(R1) PKFY-P50VHM-ER1 PKFY-P50VHM-E Item PKFY-P40VHM-E(R1) Gas pipe 12.7(1/2) 12.7(1/2) 12.7(1/2)/ 15.88(5/8) Liquid pipe 6.35(1/4)
  • Page 14 8-1-1. Thermistor <Thermistor Characteristic graph> < Thermistor for lower temperature > Room temperature thermistor (TH21) Thermistor for Liquid pipe temperature thermistor (TH22) lower temperature Gas pipe temperature thermistor (TH23) (TH24) Thermistor R =15k" ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 273+t 15k"...
  • Page 15 <Output pulse signal and the valve operation> Output Output (Phase) Closing a valve : 1 → 2 → 3 → 4 → 1 Opening a valve : 4 → 3 → 2 → 1 → 4 The output pulse shifts in above order. •...
  • Page 16 8-1-3. DC Fan motor (fan motor/indoor controller circuit board) Check method of DC fan motor (fan motor/indoor controller circuit board) Notes · High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNMF) for the motor with the power supply on. board and fan motor.) (It causes trouble of the indoor controller circuit Self check...
  • Page 17 8-2. Function of Dip switch PKFY-P32, 40, 50VHM-E PKFY-P32, 40, 50VHM-ER1 Operation by switch Effective Switch Pole Function Remarks timing Thermistor<Room temperature> Indoor unit Built-in remote controller Address board position Filter clogging detection Provide Not provide <Initial setting> Filter cleaning sign 2,500 hr 100 hr 1 2 3 4 5 6 7 8 9 10...
  • Page 18 Effective Operation by switch Remarks Switch timing SW11 Address board SW12 SW11 1s digit How to set addresses address Example : If address is "3", remain SW12 <Initial setting> setting (for over 10) at "0", and match SW11 (for 1 to 9) SW12 SW11 SW12...
  • Page 19 8-3. TEST POINT DIAGRAM 8-3-1. Indoor controller board PKFY-P32VHM-E PKFY-P32VHM-ER1 PKFY-P40VHM-E PKFY-P40VHM-ER1 PKFY-P50VHM-E PKFY-P50VHM-ER1 CNMF Connect to the fan motor (MF) 1-3 : DC310~340V 4-3 : DC15V FUSE 5-3 : DC0~6V 3.15A 250V 6-3 : DC0 or DC15V (Stop) DC7.5V (Operation)
  • Page 20 8-3-2. Wireless remote controller board PKFY-P32VHM-E PKFY-P32VHM-ER1 PKFY-P40VHM-E PKFY-P40VHM-ER1 PKFY-P50VHM-E PKFY-P50VHM-ER1 LD101 Connect to the indoor controller board (I.B) 8-3-3. Address board PKFY-P32VHM-E PKFY-P32VHM-ER1 PKFY-P40VHM-E PKFY-P40VHM-ER1 PKFY-P50VHM-E PKFY-P50VHM-ER1 Function setting 1 2 3 4 5 6 7 8 9 10...

  • Page 21: Disassembly Procedure

    DISASSEMBLY PROCEDURE PKFY-P32VHM-E PKFY-P40VHM-E PKFY-P50VHM-E PKFY-P32VHM-ER1 PKFY-P40VHM-ER1 PKFY-P50VHM-ER1 Be careful when removing heavy parts. OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 1. REMOVING THE LOWER SIDE OF THE INDOOR Figure 1 UNIT FROM THE INSTALLATION PLATE (1) Remove the front panel. (2) Insert the screw driver to the corner hole at both left and right side as shown in the figure 1.

  • Page 22: Operation Procedure

    OPERATION PROCEDURE PHOTOS Electrical box cover (top) Electrical box 3. REMOVING THE INDOOR CONTROLLER BOARD Photo 3 Screw (side cover) cover (side) AND WIRELESS CONTROLLER BOARD Screw (top cover) (1) Remove the front panel. (Refer to 2.) (2) Remove the room themp. thermistor TH21. (see Photo 3) Room temp.
  • Page 23 OPERATION PROCEDURE PHOTOS Electrical box cover (side) 5. REMOVING THE NOZZLE ASSEMBLY (with VANE Photo 7 Electrical box cover (top) and VANE MOTOR) AND DRAIN HOSE Screw (side cover) Screw (top cover) (1) Remove the front panel (Refer to 2.). (2) Remove the electrical box cover.
  • Page 24 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Feb. 2009 No. OCH442 REVISED EDITION-A PDF 7 Distributed in Jul. 2008 No. OCH442 PDF 7 New publication, effective Feb.

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