Mitsubishi Electric PKFY-P15VBM-E Technical & Service Manual
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Mitsubishi Electric PKFY-P15VBM-E Technical & Service Manual

Split-type, heat pump air conditioners series pkfy wall mounted r410a/r407c/r22
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See also: Operating Manual
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names]
PKFY-P15VBM-E
PKFY-P20VBM-E
PKFY-P25VBM-E
INDOOR UNIT
[Service Ref.]
Model name
indication
R410A
R407C
CONTENTS
1. TECHNICAL CHANGES ......................... 2
2. SAFETY PRECAUTION .......................... 2
4. SPECIFICATION ..................................... 9
6. WIRING DIAGRAM ............................... 12
8. TROUBLESHOOTING .......................... 14
9. DISASSEMBLY PROCEDURE ............. 22
PARTS CATALOG (OCB418)
November 2011
No. OCH418
REVISED EDITION-B
R22
Revision:
• PKFY-P15/20/25VBM-ER2
have been added in
REVISED EDITION-B.
• Some descriptions have
been modified.
• Please void OCH418
REVISED EDITION-A.
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-P15VBM-E

  • Page 1: Table Of Contents

    No. OCH418 REVISED EDITION-B TECHNICAL & SERVICE MANUAL R410A R407C Indoor unit Revision: [Model names] [Service Ref.] • PKFY-P15/20/25VBM-ER2 PKFY-P15VBM-E PKFY-P15VBM-E have been added in REVISED EDITION-B. PKFY-P15VBM-ER2 • Some descriptions have been modified. PKFY-P20VBM-E PKFY-P20VBM-E • Please void OCH418 REVISED EDITION-A.

  • Page 2: Pkfy-P15Vbm-Epkfy-P15Vbm-Er2

    TECHNICAL CHANGES PKFY-P15VBM-E PKFY-P15VBM-ER2 PKFY-P20VBM-ER1 PKFY-P20VBM-ER2 PKFY-P25VBM-ER1 PKFY-P25VBM-ER2 HEAT EXCHANGER and WATER CUT have been changed. PKFY-P20VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-E PKFY-P25VBM-ER1 INDOOR CONTROLLER BOARD (I.B.) has been changed. SAFETY PRECAUTION CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R407C Do not use the existing refrigerant piping.
  • Page 3 [1] Cautions for service ·After recovering the all refrigerant in the unit, proceed to working. ·Do not release refrigerant in the air. ·After completing the repair service, recharge the cycle with the specified amount of liquid refrigerant. [2] Refrigerant recharging (1) Refrigerant recharging process 1 Direct charging from the cylinder.
  • 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 collecting 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. (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 Indoor unit Air intake Filter Grille Vane Louver Air outlet OCH418B...

  • Page 7: Wired Remote Controller

    Wired remote controller “Sensor” indication Display Section Displays 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. During actual operation, only Time/Timer Display the relevant items will be lit.

  • Page 8: Wireless Remote Controller

    Wireless remote controller CHECK TEST RUN display CHECK and TEST RUN display indicate that the unit is being checked or test-run. MODEL SELECT display Blinks when model is selected. display Lights up while the signal is transmitted to the indoor unit when the button is pressed. display SET TEMP.

  • Page 9: Specification

    SPECIFICATION 4-1. SPECIFICATIONS PKFY-P20VBM-E PKFY-P25VBM-E PKFY-P15VBM-E Service ref. PKFY-P20VBM-ER1 PKFY-P25VBM-ER1 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 Power source 1-phase 220-240V 50Hz, 1-phase 220V 60Hz Cooling capacity (Nominal) kcal/h 1,450 1,900 2,400 7,500 9,600 Btu/h 5,800 1,500 2,000 2,500 kcal/h Power input 0.04 0.04 0.04...
  • Page 10 4-2. ELECTRICAL PARTS SPECIFICATIONS PKFY-P20VBM-E Service ref. PKFY-P25VBM-E PKFY-P15VBM-E PKFY-P20VBM-ER1 Symbol PKFY-P25VBM-ER1 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 Parts name PKFY-P25VBM-ER2 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-P15, 20, 25VBM-E Unit: mm PKFY-P20, 25VBM-ER1 PKFY-P15, 20, 25VBM-ER2 OCH418B 11 11...

  • Page 12: Wiring Diagram

    WIRING DIAGRAM PKFY-P20, 25VBM-E Legend Symbol Symbol Name Name Symbol Name Vane motor Indoor controller board Voltage selection Switch Linear expansion valve CN32 Connector Remote switch SW11 Address setting 1s digit Centrally control Power supply Address setting 10ths digit CN51 SW12 Terminal block...
  • Page 13 PKFY-P15VBM-E PKFY-P20, 25VBM-ER1 PKFY-P15, 20, 25VBM-ER2 Legend Symbol Symbol Symbol Name Name Name Vane motor Indoor controller board Voltage selection Switch CN32 Linear expansion valve Connector Remote switch SW11 Address setting 1s digit Centrally control Power supply Address setting 10ths digit...

  • Page 14: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PKFY-P15, 20, 25VBM-E PKFY-P20, 25VBM-ER1 PKFY-P15, 20, 25VBM-ER2 Gas pipe temperature thermistor TH23 Gas pipe Flare Strainer (#100mesh) Liquid pipe temperature thermistor TH22 Liquid pipe Strainer Heat exchanger (#100mesh) Linear expansion valve Room temperature thermistor Strainer TH21 (#100mesh) Unit: mm(inch) Service ref.

  • Page 15: Room Temperature Thermistor (Th21)

    <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) Thermistor R =15k' ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 273+t 15k' 9.6k'...

  • Page 16: Liquid Pipe

    <Output pulse signal and the valve operation> Output Output Closing a valve : 1 → 2 → 3 → 4 → 1 (Phase) Opening a valve : 4 → 3 → 2 → 1 → 4 The output pulse shifts in above order. •...

  • Page 17: Pkfy-P15, 20, 25Vbm-Epkfy-P20, 25Vbm-Er1

    8-2. FUNCTION OF DIP SWITCH PKFY-P15, 20, 25VBM-E PKFY-P20, 25VBM-ER1 PKFY-P15, 20, 25VBM-ER2 Operation by switch Effective Switch Pole Function Remarks timing Thermistor<Intake temperature> Indoor unit Built-in remote controller Address board position Filter clogging Provide Not provide <Initial setting> Filter sign indication 2,500 hr 100 hr 1 2 3 4 5 6 7 8 9 10...
  • Page 18 Effective Switch Operation by switch Remarks timing SW11 Address board SW12 SW11 1s digit How to set address address <Initial setting> Example : If address is "3", remain SW12 setting SW12 SW11 (for over 10) at "0", and match SW11 (for 1 to 9) SW12 with "3".
  • Page 19 8-3. TEST POINT DIAGRAM 8-3-1. Indoor controller board PKFY-P15, 20, 25VBM-E PKFY-P20, 25VBM-ER1 PKFY-P15, 20, 25VBM-ER2 CN60 CN5V CN81 CN90 CN29 Vane motor output Connected to the Connected to the wireless Pipe temperature Linear expansion valve (MV) address board (CN82) remote controller board (W.B) thermistor/Gas (TH23) output (LEV)
  • Page 20 8-3-2. Indoor power board PKFY-P15, 20, 25VBM-E PKFY-P20, 25VBM-ER1 PKFY-P15, 20, 25VBM-ER2 Fan motor output (MF) Power supply for indoor controller board Between 1 to 3 220-240V AC CN2M FUSE Connected to the terminal block (TB5) 6.3A 250V (M-NET transmission connecting wire) 24-30V DC (non-polar) CN35P Connected to the indoor controller board...
  • Page 21 8-3-2. Indoor power board Power supply for PKFY-P15, 20, 25VBM-E indoor controller board Fan motor output (MF) PKFY-P20, 25VBM-ER1 Between 1 to 3 208/230V AC PKFY-P15, 20, 25VBM-ER2 CN2M Connected to the terminal block (TB5) FUSE (M-NET transmission connecting wire) 6A 250V 24-30V DC (non-polar) CN35P...

  • Page 22: Disassembly Procedure

    DISASSEMBLY PROCEDURE PKFY-P15VBM-E PKFY-P20VBM-E(R1) PKFY-P25VBM-E(R1) Be careful when removing heavy parts. OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 1. REMOVING THE LOWER SIDE OF THE INDOOR UNIT Figure 1 Figure 2 FROM THE INSTALLATION PLATE When there is removing plate (1) Remove the corner box at right lower side of the indoor unit and remove the removing plate from the corner box.
  • Page 23 OPERATION PROCEDURE OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS PHOTOS & ILLUSTRATIONS 3. REMOVING THE INDOOR CONTROLLER BOARD AND Electrical box cover Photo 2 INDOOR POWER BOARD (1) Remove the front panel. (Refer to 2) (2) Remove the electrical box cover (screw 4 × 10). (Refer to the Photo 2) INDOOR CONTROLLER BOARD (1) Disconnect the following connectors on the indoor...

  • Page 24: Operation Procedure

    OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 5. REMOVING THE NOZZLE ASSEMBLY AND DRAIN HOSE Photo 5 (1) Remove the front panel (Refer to 2). Heat exchanger Electrical box (2) Remove the electrical box cover. (3) Disconnect the connector (CN5V) on the indoor controller Drain hose board.
  • Page 25 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 Be careful when removing heavy parts. OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 1. REMOVING THE LOWER SIDE OF THE INDOOR UNIT Figure 1 Figure 2 FROM THE INSTALLATION PLATE When there is removing plate (1) Remove the corner box at right lower side of the indoor unit and remove the removing plate from the corner box.
  • Page 26 OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 3. REMOVING THE INDOOR CONTROLLER BOARD AND Photo 2 INDOOR POWER BOARD Electrical box (1) Remove the front panel. (Refer to procedure 2) cover (2) Remove the electrical box cover (screw 4 × 10). (See the Photo 2) Screw for INDOOR CONTROLLER BOARD electrical box...
  • Page 27 OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 6. REMOVING THE ELECTRICAL BOX Photo 6 (1) Remove the front panel. (Refer to procedure 2) (2) Remove the electrical box cover. (See the Photo 2) Indoor controller board (3) Remove the water cut. (See the Photo 3) Fixture for Screw for Linear...
  • Page 28 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN cCopyright 2007 MITSUBISHI ELECTRIC CORPORATION Distributed in Nov. 2011 No. OCH418 REVISED EDITION-B New publication, effective Nov. 2011 Distributed in Nov. 2008 No. OCH418 REVISED EDITION-A PDF 7 Specifications are subject to change without notice.

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Pkfy-p15vbm-er2Pkfy-p20vbm-er1Pkfy-p20vbm-er2Pkfy-p25vbm-ePkfy-p20vbm-ePkfy-p25vbm-er1 ... Show all

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