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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model Name]
PKFY-P15VBM-E
PKFY-P20VBM-E
PKFY-P25VBM-E
INDOOR UNIT
[Service Ref.]
PKFY-P15VBM-E
PKFY-P20VBM-E
PKFY-P20VBM-ER1
PKFY-P25VBM-E
PKFY-P25VBM-ER1
Model name
indication
R410A
CONTENTS
1. TECHNICAL CHANGES ......................... 2
2. SAFETY PRECAUTION .......................... 3
3. PARTS NAMES AND FUNCTIONS ........ 5
4. SPECIFICATION ................................... 12
5. OUTLINES AND DIMENSIONS ............ 14
6. WIRING DIAGRAM ............................... 15
7. REFRIGERANT SYSTEM DIAGRAM ........ 18
8. TROUBLESHOOTING .......................... 19
9. DISASSEMBLY PROCEDURE ............. 26
PARTS CATALOG (OCB418)
March 2017
No. OCH418
REVISED EDITION-E
Revision:
• Added
PKFY-P15VBM-ER5,
PKFY-P20VBM-ER5, and
PKFY-P25VBM-ER5 in
REVISED EDITION-E.
• Some descriptions have
been modified.
OCH418 REVISED EDITION-D
is void.
Notes:
• 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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Table of Contents
Related Manuals for Mitsubishi Electric CITY MULTY PKFY Series
Summary of Contents for Mitsubishi Electric CITY MULTY PKFY Series
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Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS March 2017 No. OCH418 REVISED EDITION-E TECHNICAL & SERVICE MANUAL R410A Indoor unit [Model Name] [Service Ref.] PKFY-P15VBM-E PKFY-P15VBM-E PKFY-P15VBM-ER2 Revision: • Added PKFY-P15VBM-ER3 PKFY-P15VBM-ER5, PKFY-P15VBM-ER4 PKFY-P20VBM-ER5, and PKFY-P15VBM-ER5 PKFY-P25VBM-ER5 in REVISED EDITION-E. PKFY-P20VBM-E PKFY-P20VBM-E •... -
Page 2: Pkfy-P15Vbm-Er2
TECHNICAL CHANGES PKFY-P15VBM-ER4 PKFY-P15VBM-ER5 PKFY-P20VBM-ER4 PKFY-P20VBM-ER5 PKFY-P25VBM-ER4 PKFY-P25VBM-ER5 HEAT EXCHANGER and LEV have been changed. INDOOR CONTROLLER BOARD (I.B.) has been changed. (S/W version up) PKFY-P15VBM-ER3 PKFY-P15VBM-ER4 PKFY-P20VBM-ER3 PKFY-P20VBM-ER4 PKFY-P25VBM-ER3 PKFY-P25VBM-ER4 HEAT EXCHANGER and LEV have been changed. PKFY-P15VBM-ER2 PKFY-P15VBM-ER3 PKFY-P20VBM-ER2 PKFY-P20VBM-ER3 PKFY-P25VBM-ER2... -
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.
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Page 5: Parts Names And Functions
PARTS NAMES AND FUNCTIONS 3-1. Indoor unit Air intake Filter Grille Vane Louver Air outlet OCH418E... - Page 6 3-2. WIRED REMOTE CONTROLLER Wired remote controller function The functions which can be used are restricted according to the model. : Supported : Unsupported PAR-32MAA Function PAR-21MAA Slim City multi Body Product size H × W × D (mm) 120 × 120 × 19 120 ×...
- Page 7 Room Cool Set temp. Auto Mode Temp. The main display can be displayed in 2 different modes: "Full" and "Basic". The initial setting is "Full". To switch to the "Basic" mode, change the setting on the Main display setting. <Full mode> <Basic mode>...
- Page 8 Menu structure Press the button. MENU Main menu Move the cursor to the desired item with the buttons, and press the button. SELECT Vane · Louver · Vent. (Lossnay) High power Timer ON/OFF timer Auto-Off timer Weekly timer Restriction Temp. range Operation lock Energy saving Auto return...
- Page 9 Main menu list Setting and display items Setting details Vane · Louver · Vent. (Lossnay) Use to set the vane angle. • Select a desired vane setting from 5 different settings. Use to turn ON/OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation.
- Page 10 3-3. WIRED REMOTE CONTROLLER <PAR-21MAA> “Sensor” indication Display Section Displays when the remote controller sensor is used. Day-of-Week For the purposes of 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 11 3-4. 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.
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Page 12: Specification
SPECIFICATION 4-1. SPECIFICATIONS PKFY-P20VBM-E PKFY-P25VBM-E PKFY-P15VBM-E PKFY-P20VBM-ER1 PKFY-P25VBM-ER1 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 PKFY-P15VBM-ER3 Service ref. PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 PKFY-P15VBM-ER4 PKFY-P20VBM-ER4 PKFY-P25VBM-ER4 PKFY-P15VBM-ER5 PKFY-P20VBM-ER5 PKFY-P25VBM-ER5 Power source 1-phase 220-240V 50Hz, 1-phase 220V 60Hz Cooling capacity (Nominal) kcal/h 1,450 1,900 2,400 5,800 7,500 9,600 BTU/h kcal/h 1,500... - Page 13 4-2. ELECTRICAL PARTS SPECIFICATIONS PKFY-P20VBM-E PKFY-P25VBM-E Service ref. PKFY-P15VBM-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 PKFY-P15VBM-ER4 Symbol PKFY-P20VBM-ER4 PKFY-P25VBM-ER4 PKFY-P15VBM-ER5 Parts name PKFY-P20VBM-ER5 PKFY-P25VBM-ER5 Room temperature TH21 Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.4k", 30:/4.3k", 40:/3.0k" detection thermistor Pipe temperature TH22 Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.4k", 30:/4.3k", 40:/3.0k"...
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Page 14: 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 PKFY-P15VBM-ER4 PKFY-P20VBM-ER4 PKFY-P25VBM-ER4 PKFY-P15VBM-ER5 PKFY-P20VBM-ER5 PKFY-P25VBM-ER5 Unit: mm OCH418E... -
Page 15: 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 Address setting 10ths digit CN51 SW12 Terminal block... - Page 16 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 Power supply Address setting 10s digit CN51 SW12 Terminal...
- Page 17 PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 PKFY-P15VBM-ER4 PKFY-P20VBM-ER4 PKFY-P25VBM-ER4 PKFY-P15VBM-ER5 PKFY-P20VBM-ER5 PKFY-P25VBM-ER5 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 CN51 SW12 Address setting 10s digit...
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Page 18: 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 PKFY-P15VBM-ER4 PKFY-P20VBM-ER4 PKFY-P25VBM-ER4 PKFY-P15VBM-ER5 PKFY-P20VBM-ER5 PKFY-P25VBM-ER5 Pipe temperature detection thermistor/gas (TH23) Gas pipe Flare Strainer (#100mesh) Pipe temperature detection thermistor/liquid (TH22) Liquid pipe Strainer Heat exchanger (#100mesh) Linear expansion valve... -
Page 19: Troubleshooting
TROUBLESHOOTING 8-1. HOW TO CHECK THE PARTS 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 PKFY-P15VBM-ER4 PKFY-P20VBM-ER4 PKFY-P25VBM-ER4 PKFY-P15VBM-ER5 PKFY-P20VBM-ER5 PKFY-P25VBM-ER5 Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester. detection thermistor (At the ambient temperature 10 to 30:) (TH21) - Page 20 8-1-1. Thermistor <Thermistor characteristic graph> < Thermistor for lower temperature > Room temperature detection thermistor (TH21) Thermistor for Pipe temperature detection thermistor/liquid (TH22) lower temperature Pipe temperature detection thermistor/gas (TH23) Thermistor R =15 k" ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 273+t 15 k"...
- Page 21 <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 22 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 PKFY-P15VBM-ER4 PKFY-P20VBM-ER4 PKFY-P25VBM-ER4 PKFY-P15VBM-ER5 PKFY-P20VBM-ER5 PKFY-P25VBM-ER5 The black square ( ) indicates a switch position. Operation by switch Effective Switch Pole Function Remarks timing Thermistor Built-in remote <Intake temperature...
- Page 23 The black square ( ) indicates a switch position. Effective Switch Pole Function Remarks timing Address board 220 V 240 V If the unit is used at the 230 V or 240 V area, <Initial setting> set the voltage to 240 V. Voltage 220 V 240 V...
- 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 PKFY-P15VBM-ER4 PKFY-P20VBM-ER4 PKFY-P25VBM-ER4 PKFY-P15VBM-ER5 PKFY-P20VBM-ER5 PKFY-P25VBM-ER5 CN42 CN5V CN90 CN81 CN29 CN60 Connected to Vane motor Connected to the Connected to Pipe temperature Linear expansion the address...
- Page 25 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 PKFY-P15VBM-ER4 PKFY-P20VBM-ER4 PKFY-P25VBM-ER4 PKFY-P15VBM-ER5 PKFY-P20VBM-ER5 PKFY-P25VBM-ER5 Power supply for indoor controller board Fan motor output (MF) Between 1 to 3 220–240 V AC CN2M Connected to the terminal block (TB5) (M-NET transmission connecting wire) 24–30 V DC (non-polar) FUSE...
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Page 26: 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 from the instal- Figure 1 Figure 2 lation 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 27 OPERATION PROCEDURE OPERATION PROCEDURE PHOTOS 3. Removing the indoor controller board and indoor power Electrical box cover Photo 2 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 Screw...
- Page 28 OPERATION PROCEDURE PHOTOS 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 board.
- Page 29 PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2 PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3 PKFY-P15VBM-ER4 PKFY-P20VBM-ER4 PKFY-P25VBM-ER4 PKFY-P15VBM-ER5 PKFY-P20VBM-ER5 PKFY-P25VBM-ER5 Be careful when removing heavy parts. OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 1. Removing the lower side of the indoor unit from the instal- Figure 1 Figure 2 lation 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 30 OPERATION PROCEDURE PHOTOS 3. Removing the indoor controller board and indoor power Photo 2 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 31 OPERATION PROCEDURE PHOTOS 6. Removing the electrical box Photo 6 (1) Remove the front panel. (Refer to procedure 2) Screw for (2) Remove the electrical box cover. (See Photo 2) Indoor controller board ground wire (3) Remove the water cut. (See Photo 3) Fixture for Linear (4) Pull the nozzle assembly toward you as opening the catch...
- Page 32 (TH23) HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN cCopyright 2007 MITSUBISHI ELECTRIC CORPORATION Issued: Mar. 2017 No. OCH418 REVISED EDITION-E Issued: Jul. 2016 No. OCH418 REVISED EDITION-D Issued: Dec. 2012 No. OCH418 REVISED EDITION-C Issued: Nov.