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Mitsubishi Electric PKFY-P15VBM-ER2 Technical & Service Manual
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Mitsubishi Electric PKFY-P15VBM-ER2 Technical & Service Manual

Split-type heat pump air conditioner
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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.]
PKFY-P15VBM-E
PKFY-P15VBM-ER2
PKFY-P15VBM-ER3
PKFY-P20VBM-E
PKFY-P20VBM-ER1
PKFY-P20VBM-ER2
PKFY-P20VBM-ER3
PKFY-P25VBM-E
PKFY-P25VBM-ER1
PKFY-P25VBM-ER2
PKFY-P25VBM-ER3
Model name
indication
R410A
CONTENTS
1. TECHNICAL CHANGES ......................... 2
2. SAFETY PRECAUTION .......................... 3
4. SPECIFICATION ................................... 13
6. WIRING DIAGRAM ............................... 16
8. TROUBLESHOOTING .......................... 19
9. DISASSEMBLY PROCEDURE ............. 28
PARTS CATALOG (OCB418)
December 2012
No. OCH418
REVISED EDITION-C
Revision:
• PKFY-P15/20/25VBM-ER3
have been added in
REVISED EDITION-C.
• Some descriptions have
been modified.
• Please void OCH418
REVISED EDITION-B.
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-ER2

  • Page 1: Table Of Contents

    TECHNICAL & SERVICE MANUAL R410A Indoor unit [Model names] [Service Ref.] Revision: PKFY-P15VBM-E PKFY-P15VBM-E • PKFY-P15/20/25VBM-ER3 have been added in PKFY-P15VBM-ER2 REVISED EDITION-C. • Some descriptions have PKFY-P15VBM-ER3 been modified. PKFY-P20VBM-E PKFY-P20VBM-E • Please void OCH418 REVISED EDITION-B. PKFY-P20VBM-ER1 PKFY-P20VBM-ER2 Note: •...

  • Page 2: Technical Changes

    TECHNICAL CHANGES PKFY-P15VBM-ER2 PKFY-P15VBM-ER3 PKFY-P20VBM-ER2 PKFY-P20VBM-ER3 PKFY-P25VBM-ER2 PKFY-P25VBM-ER3 INDOOR CONTROLLER BOARD (I.B.) has been changed. (S/W version up) 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.

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 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 4 [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 5: Part Names And Functions

    PART NAMES AND FUNCTIONS 3-1. Indoor unit Air intake Filter Grille Vane Louver Air outlet OCH418C...
  • Page 6 3-2. WIRED REMOTE CONTROLLER <PAR-30MAA/PAR-31MAA> Wired remote controller function * The functions which can be used are restricted according to the model. : Supported : Unsupported PAR-30MAA/PAR-31MAA Function PAR-21MAA Slim City multi Body Product size H × W × D (mm) 120 ×...
  • Page 7 The main display can be displayed in two different modes: "Full" and "Basic". The factory setting is "Full". To switch to the "Basic" mode, change the setting on the Main display setting. <Full mode> <Basic mode> * All icons are displayed for explanation. Cool Set temp.
  • Page 8 Menu structure Press the button. MENU Main menu Move the cursor to the desired item with the buttons, and press the SELECT button. Vane · Louver · Vent. (Lossnay) High power Timer On / Off timer Auto-Off timer Filter information Error information Weekly timer Energy saving...
  • Page 9 Main menu list Setting and display items Setting details Vane · Louver · Vent. Use to set the vane angle. (Lossnay) • Select a desired vane setting from fi ve different settings. Use to turn ON / OFF the louver. •...
  • Page 10 Setting and display items Setting details Initial setting Display Make the settings for the remote controller related items as necessary. details Clock: The factory settings are "Yes" and "24h" format. Temperature: Set either Celsius (°C) or Fahrenheit (°F). Room temp. : Set Show or Hide. Auto mode: Set the Auto mode display or Only Auto display.

  • Page 11: Operation Section

    3-3. WIRED REMOTE CONTROLLER <PAR-21MAA> “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 12: Wireless Remote Controller

    3-4. Wireless remote controller CHECK TEST RUN display CHECK and TEST RUN display indicate that the unit is being checked or test-run. display MODEL SELECT 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 13: Specification

    SPECIFICATION 4-1. SPECIFICATIONS PKFY-P20VBM-E PKFY-P25VBM-E PKFY-P15VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-ER1 Service ref. PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 Power source 1-phase 220-240V 50Hz, 1-phase 220V 60Hz Cooling capacity kcal/h 1,450 1,900 2,400 (Nominal) Btu/h 5,800 7,500 9,600 1,500 2,000 2,500 kcal/h Power input 0.04...
  • Page 14 4-2. ELECTRICAL PARTS SPECIFICATIONS Service ref. PKFY-P20VBM-E PKFY-P25VBM-E PKFY-P15VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-ER1 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 Symbol PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 Parts name Room temperature TH21 Resistance 0 /15k , 10 /9.6k , 20 /6.3k , 25 /5.4k , 30 /4.3k , 40 /3.0k...

  • Page 15: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PKFY-P15VBM-E PKFY-P20VBM-E PKFY-P25VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-ER1 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 Unit: mm OCH418C...

  • Page 16: Wiring Diagram

    WIRING DIAGRAM PKFY-P20VBM-E PKFY-P25VBM-E Legend Symbol Symbol Symbol Name Name Name Vane motor Indoor controller board Switch Voltage selection Linear expansion valve CN32 Connector Remote switch SW11 Address setting 1s digit Centrally control Power supply CN51 Address setting 10ths digit Terminal SW12 block...

  • Page 17: Pkfy-P15Vbm-E

    PKFY-P15VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-ER1 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 Legend Symbol Symbol Symbol Name Name Name Vane motor Indoor controller board Voltage selection Switch Linear expansion valve CN32 Connector Remote switch SW11 Address setting 1s digit Centrally control CN51 Power supply Address setting 10ths digit...

  • Page 18: Pkfy-P15Vbm-Er3

    PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 Legend Symbol Symbol Symbol Name Name 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 CN52...

  • Page 19: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PKFY-P15VBM-E PKFY-P20VBM-E PKFY-P25VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-ER1 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 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...
  • Page 20 <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 21 <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 22: Pkfy-P20Vbm-Epkfy-P20Vbm-Er1

    8-2. FUNCTION OF DIP SWITCH PKFY-P15VBM-E PKFY-P20VBM-E PKFY-P25VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-ER1 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 The black square ( ) indicates a switch position. Operation by switch Effective Switch Pole Function Remarks timing Thermistor<Intake temperature> Indoor unit Built-in remote controller...
  • Page 23 The black square ( ) indicates a switch position. 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...
  • Page 24 8-3. TEST POINT DIAGRAM 8-3-1. Indoor controller board PKFY-P15VBM-E PKFY-P20VBM-E PKFY-P25VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-ER1 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 CN42 CN60 CN5V CN90 CN81 CN29 Connected to Vane motor Connected to the Connected to Pipe temperature Linear expansion the address...
  • Page 25 Indoor controller board PKFY-P15VBM-E PKFY-P20VBM-E PKFY-P25VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-ER1 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 CN42 CN60 CN5V CN90 CN81 CN29 Connected to Vane motor Connected to the Connected to Pipe temperature Linear expansion the address output (MV) wireless remote the address...
  • Page 26 8-3-2. Indoor power board PKFY-P15VBM-E PKFY-P20VBM-E PKFY-P25VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-ER1 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 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...
  • Page 27 8-3-2. Indoor power board PKFY-P15VBM-E PKFY-P20VBM-E PKFY-P25VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-ER1 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 Power supply for indoor controller board Fan motor output (MF) Between 1 to 3 220-240V AC CN2M Connected to the terminal block (TB5) FUSE (M-NET transmission connecting wire) 6.3A 250V...

  • Page 28: Disassembly Procedure

    DISASSEMBLY PROCEDURE PKFY-P15VBM-E PKFY-P20VBM-E PKFY-P25VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-ER1 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 29 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 procedure 2) (2) Remove the electrical box cover (screw 4 × 10). (See Photo 2) INDOOR CONTROLLER BOARD (1) Disconnect the following connectors from the indoor...
  • Page 30 OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 5. REMOVING THE NOZZLE ASSEMBLY AND DRAIN HOSE Photo 5 (1) Remove the front panel (Refer to procedure 2). Heat exchanger Electrical box (2) Remove the electrical box cover. (See Photo 2) (3) Disconnect the connector (CN5V) on the indoor controller Drain hose board.
  • Page 31 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 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 32 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 Photo 2) Screw for INDOOR CONTROLLER BOARD electrical box...
  • Page 33 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 Photo 2) Indoor controller board (3) Remove the water cut. (See Photo 3) Fixture for Screw for Linear...
  • Page 34 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN cCopyright 2007 MITSUBISHI ELECTRIC CORPORATION Distributed in Dec. 2012 No. OCH418 REVISED EDITION-C Distributed in Nov. 2011 No. OCH418 REVISED EDITION-B Distributed in Nov. 2008 No. OCH418 REVISED EDITION-A PDF 7 Distributed in May 2007 No.

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