Mitsubishi Electric PMFY-P20VBM-E1 Technical & Service Manual
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Mitsubishi Electric PMFY-P20VBM-E1 Technical & Service Manual

Mitsubishi Electric PMFY-P20VBM-E1 Technical & Service Manual

Ceiling cassettes pmfy series
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Series PMFY
Indoor unit
[Model names]
PMFY-P20VBM-E
PMFY-P25VBM-E
PMFY-P32VBM-E
PMFY-P40VBM-E
INDOOR UNIT
Ceiling Cassettes
[Service Ref.]
PMFY-P20VBM-E
PMFY-P20VBM-E
PMFY-P20VBM-E#2
PMFY-P20VBM-ER3
PMFY-P25VBM-E
PMFY-P25VBM-E
PMFY-P25VBM-E#2
PMFY-P25VBM-ER3
PMFY-P32VBM-E
PMFY-P32VBM-E
PMFY-P32VBM-E#2
PMFY-P40VBM-E
PMFY-P40VBM-E
PMFY-P40VBM-E#2
REVISED EDITION-D
R410A
R407C
Revision:
• PMFY-P20/25/32/40VBM-ER3
are added in REVISED
1
EDITION-D.
• Some descriptions have
been modified.
• Please void OC307
REVISED EDITION-C.
1
Note:
• This manual describes only
service data of the indoor
units.
• RoHS compliant products
1
have <G> mark on the spec
name plate.
• For servicing RoHS compli-
ant products, refer to the
RoHS Parts List.
1
CONTENTS
1. TECHNICAL CHANGES ..................... 2
2. SAFETY PRECAUTION ...................... 2
4. SPECIFICATIONS ............................... 8
6. WIRING DIAGRAM ........................... 13
8. TROUBLE SHOOTING ..................... 17
10. PARTS LIST ...................................... 30
11. RoHS PARTS LIST ........................... 33
October 2009
No. OC307
R22

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  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS October 2009 No. OC307 REVISED EDITION-D TECHNICAL & SERVICE MANUAL Ceiling Cassettes Series PMFY R410A R407C Indoor unit [Model names] [Service Ref.] Revision: PMFY-P20VBM-E PMFY-P20VBM-E • PMFY-P20/25/32/40VBM-ER3 are added in REVISED PMFY-P20VBM-E EDITION-D. PMFY-P20VBM-E#2 • Some descriptions have PMFY-P20VBM-ER3 been modified.

  • Page 2: Pmfy-P32Vbm-Er3

    TECHNICAL CHANGES PMFY-P20VBM-E#2 PMFY-P20VBM-ER3 PMFY-P25VBM-E#2 PMFY-P25VBM-ER3 PMFY-P32VBM-E#2 PMFY-P32VBM-ER3 PMFY-P40VBM-E#2 PMFY-P40VBM-ER3 1. DRAIN PIPE has been changed. 2. JOINT SOCKET (FOR DRAIN PIPE) has been added. PMFY-P20VBM-E PMFY-P20VBM-E#2 PMFY-P25VBM-E PMFY-P25VBM-E#2 PMFY-P32VBM-E PMFY-P32VBM-E#2 PMFY-P40VBM-E PMFY-P40VBM-E#2 1. CONTROLLER BOARD (I.B) has been changed. 2.
  • Page 3 [1] Cautions for service · After recovering all the 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 1Direct charging from the cylinder...
  • Page 4 Cautions for units utilizing refrigerant R410A Use new refrigerant pipes. Do not use refrigerant other than R410A. In case of using the existing pipes for R22, be careful with If other refrigerant (R22 etc.) is used, chlorine in refrige- the followings. rant 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 Indoor Unit Auto Air Swing Vane Guide vane Disperses airflow up and Air flow can be changed to horizontal down and adjusts the angle by moving the Guide vane to the left or right. of airflow direction. Horizontal Air Outlet Filters Air intake...
  • Page 7 Wired remote controller Display Section Day-of-Week “Sensor” indication For purposes of this explanation, Shows the current day of the week. Displayed when the remote controller all parts of the display are shown sensor is used. as lit. During actual operation, only the relevant items will be lit.

  • Page 8: Specifications

    SPECIFICATIONS 4-1. SPECIFICATION PMFY-P32VBM-E PMFY-P40VBM-E PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P20VBM-E PMFY-P32VBM-E PMFY-P40VBM-E PMFY-P25VBM-E Item PMFY-P20VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-ER3 PMFY-P40VBM-ER3 PMFY-P20VBM-ER3 PMFY-P25VBM-ER3 · Single phase 220V-230V-240V 50Hz / 220V 60Hz Power Cooling capacity Heating capacity Cooling 0.042 0.044 0.044 0.054 Input Heating 0.042 0.044 0.044...
  • Page 9 4-2. ELECTRIC PARTS SPECIFICATIONS Service ref. PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E Symbol PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2 Parts name PMFY-P20VBM-ER3 PMFY-P25VBM-ER3 PMFY-P32VBM-ER3 PMFY-P40VBM-ER3 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...
  • Page 10 4-3. AIR CAPACITY TAKEN FROM OUTSIDE PMFY-P·VBM-E series enables to take fresh air from outside. When taking fresh air, the duct fan is used. The air capacity should be 20% or less of the air flow SPEC(Hi). 288.5 Unit : mm 4- 2.8 Fresh air intake hole Fresh air intake hole...

  • Page 11: Noise Criterion Curves

    4-4. NOISE CRITERION CURVES PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P25VBM-E PMFY-P20VBM-E NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE PMFY-P32VBM-E High High PMFY-P20VBM-E PMFY-P25VBM-E#2 Medium1 Medium1 PMFY-P32VBM-E#2 PMFY-P20VBM-E#2 Medium2 Medium2 PMFY-P25VBM-ER3 PMFY-P20VBM-ER3 PMFY-P32VBM-ER3 NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 NC-20...

  • Page 12: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PMFY-P20VBM-E PMFY-P20VBM-E PMFY-P20VBM-E#2 PMFY-P20VBM-ER3 PMFY-P25VBM-E PMFY-P25VBM-E PMFY-P25VBM-E#2 PMFY-P25VBM-ER3 PMFY-P32VBM-E PMFY-P32VBM-E PMFY-P32VBM-E#2 PMFY-P32VBM-ER3 PMFY-P40VBM-E PMFY-P40VBM-E PMFY-P40VBM-E#2 PMFY-P40VBM-ER3 Unit : mm...

  • Page 13: Wiring Diagram

    WIRING DIAGRAM PMFY-P20VBM-E FUSE BREAKER PMFY-P25VBM-E PULL BOX (15A) (15A) POWER SUPPLY TO OUTDOOR UNIT TO NEXT PMFY-P32VBM-E ~/N 220-230-240V 50Hz BC CONTROLLER INDOOR UNIT 220V 60Hz REMOTE CONTROLLER DC24-30V PMFY-P40VBM-E TB2 L M1 M2 (SHIELD) TO MA-REMOTE CONTROLLER DC8.7-13V TB15 CN3A CN2M...
  • Page 14 PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E FUSE BREAKER TO OUTDOOR UNIT PULL BOX (15A) (15A) BC CONTROLLER POWER SUPPLY TO NEXT REMOTE CONTROLLER ~ / N INDOOR UNIT DC24-30V 220-240V 50Hz 220V 60Hz TO MA-REMOTE CONTROLLER DC8.7-13V M1 M2 S (SHIELD) TB15 CN3A (BLU) REMOCON...
  • Page 15 PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2 PMFY-P20VBM-ER3 PMFY-P25VBM-ER3 PMFY-P32VBM-ER3 PMFY-P40VBM-ER3 TO OUTDOOR UNIT TO MA-REMOTE BC CONTROLLER CONTROLLER REMOTE CONTROLLER DC8.7-13V DC24-30V FUSE BREAKER PULL BOX POWER SUPPLY TO NEXT INDOOR 220-240V 50Hz UNIT 220V 60Hz TB15 M1 M2 (SHIELD) FUSE DC311 ZNR01 339V D.U.M...

  • Page 16: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PMFY-P20VBM-E PMFY-P20VBM-E PMFY-P20VBM-E#2 PMFY-P20VBM-ER3 PMFY-P25VBM-E PMFY-P25VBM-E PMFY-P25VBM-E#2 PMFY-P25VBM-ER3 PMFY-P32VBM-E PMFY-P32VBM-E PMFY-P32VBM-E#2 PMFY-P32VBM-ER3 PMFY-P40VBM-E PMFY-P40VBM-E PMFY-P40VBM-E#2 PMFY-P40VBM-ER3 Gas pipe Strainer (#50mesh) temperature thermistor TH23 Gas pipe Liquid pipe temperature thermistor TH22 Flare connection Liquid pipe Heat exchanger Linear expansion valve Strainer (#100mesh) Strainer (#100mesh) Room temperature thermistor TH21...

  • Page 17: Trouble Shooting

    TROUBLE SHOOTING 8-1. HOW TO CHECK THE PARTS PMFY-P20VBM-E PMFY-P20VBM-E PMFY-P20VBM-E#2 PMFY-P20VBM-ER3 PMFY-P25VBM-E PMFY-P25VBM-E PMFY-P25VBM-E#2 PMFY-P25VBM-ER3 PMFY-P32VBM-E PMFY-P32VBM-E PMFY-P32VBM-E#2 PMFY-P32VBM-ER3 PMFY-P40VBM-E PMFY-P40VBM-E PMFY-P40VBM-E#2 PMFY-P40VBM-ER3 Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester. thermistor (TH21) (At the ambient temperature 10 ~30 )
  • Page 18 <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 0: : 15k'...
  • Page 19 <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 20 8-2. TROUBLE SHOOTING Check method of indoor fan motor (fan motor / controller board) Notes · High voltage is applied to the connecter (FAN)(CNMF1, 2) for the fan motor. Pay attention to the service. · Do not pull out the connector (FAN)(CNMF1, 2) for the motor with the power supply on, doing so may result in damage to the board.
  • Page 21 8-3. FUNCTION OF DIP SWITCH PMFY-P20VBM-E PMFY-P20VBM-E PMFY-P20VBM-E#2 PMFY-P20VBM-ER3 PMFY-P25VBM-E PMFY-P25VBM-E PMFY-P25VBM-E#2 PMFY-P25VBM-ER3 PMFY-P32VBM-E PMFY-P32VBM-E PMFY-P32VBM-E#2 PMFY-P32VBM-ER3 PMFY-P40VBM-E PMFY-P40VBM-E PMFY-P40VBM-E#2 PMFY-P40VBM-ER3 Operation by switch Effective Switch Pole Function Remarks timing Thermistor <Room temperature Bult-in remote controller Indoor unit Address board detection>...
  • Page 22 Effective Switch Pole Operation by switch Remarks timing Address board SW11 1s digit How to set addresses SW12 SW11 address Example : If address is “3”, remain SW12 setting <Initial setting> (for over 10) at “0”, and match SW11 (for 1 to 9) SW12 SW12 SW11...
  • Page 23 8-4. TEST POINT DIAGRAM 8-4-1. Indoor controller board PMFY-P20VBM-E PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P32VBM-E PMFY-P40VBM-E PMFY-P40VBM-E CN32 Capacity setting Mode selection Model selection Connector (Remote switch) Drain pump output (DP) Between 1 to 3 220-240V AC CN27 Damper CN25 Humidifier Power supply for indoor controller board CN6V...
  • Page 24 Indoor controller board PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2 PMFY-P20VBM-ER3 PMFY-P25VBM-ER3 PMFY-P32VBM-ER3 PMFY-P40VBM-ER3 Power supply 1-3 : 220-240V AC FUSE 6.3A 250V CNMF1, CNMF2 FAN motor CNMF11-CNMF21 : 310-340V DC CNMF27-1 : 0-15V DC LED1 Main power supply CN2M Connect to the terminal block TB5 (M-NET transmission connecting wire) 24-30V DC (non-polar) LED2...
  • Page 25 8-4-2. Address board PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2 PMFY-P20VBM-ER3 PMFY-P25VBM-ER3 PMFY-P32VBM-ER3 PMFY-P40VBM-ER3 Voltage selector Function setting SW12 SW11 SW14 Address setting Address setting Branch No. 10ths DIGIT 1s DIGIT...

  • Page 26: Disassembly Procedure

    DISASSEMBLY PROCEDURE PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2 PMFY-P20VBM-ER3 PMFY-P25VBM-ER3 PMFY-P32VBM-ER3 PMFY-P40VBM-ER3 Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS Photo 1 Air intake grille 1. Removing the grille Opening the air intake grille Air outlet (1) Press the of the air intake grille.
  • Page 27 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS Figure 6 Removing the grille Hooks (1) Open the intake grille by pressing of the air intake PUSH grille and remove the air fi lter (× 2). (See Figure 1) (2) Remove the screw cover in the middle of the air outlet. (See Figure 7) (3) Open the upper and lower fl...
  • Page 28 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS Photo 2 2. Removing the electrical parts box Claw in middle Nozzle Electrical parts of nozzle (1) Remove the grille. (2) Remove the address board cover. (3) Remove the electrical parts cover. (4) Disconnect the connectors of fan motor, vane motor, drain pump, room temperature thermistor, pipe temperature thermistor (Liquid, Gas),...
  • Page 29 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS Photo 6 Drain sensor Drain pump 5. Removing the drain pump (1) Remove the grille. (2) Unhook the claw in the middle of nozzle and remove the drain pan. (See Photo 2) (3) Remove the address board cover. (See Photo 3) (4) Remove the electrical parts cover.

  • Page 30: Parts List

    PARTS LIST (non-RoHS compliant) PANEL PARTS FOR PMFY-P20/25/32/40VBM-E PMP-40BM TEMP. ON/OFF Q'ty/set Wiring Recom- Remarks Diagram mended Part No. Part Name Specification (Drawing No.) Symbol Q'ty PMP-40BM AIR OUTLET GRILLE LATCH — HANGER (DT88D360H03) PANEL HOOK GRILLE CATCH L.L.FILTER L.L.FILTER INTAKE GRILLE GRILLE CATCH RECEIVER COVER...
  • Page 31 FUNCTIONAL PARTS PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E Part number that is circled is not shown in the figure. Q'ty/set Wiring Recom- Remarks Diagram mended Part No. Part Name Specification PMFY-P · VBM-E (Drawing No.) Symbol Q'ty 20, 25 32, 40 — (DT00A478G88) CABINET —...
  • Page 32 ELECTRICAL PARTS PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E Q'ty/set Wiring Recom- Remarks Diagram mended Part No. Part Name Specification PMFY- (Drawing No.) P20/25/32/40 Symbol Q'ty VBM-E (RG02B337G16) — CONTROL BOX T7W A14 3P (L,N, ) TERMINAL BLOCK T7W E00 716 3P (M1,M2,S) TERMINAL BLOCK TB15 2P(1,2)

  • Page 33: Rohs Parts List

    RoHS PARTS LIST PANEL PARTS PMP-40BM (FOR PMFY-P20/25/32/40VBM-E PMP-40BMW (FOR PMFY-P20/25/32/40VBM-E#2, PMFY-P20/25/32/40VBM-ER3) TEMP. ON/OFF Q'ty/set Wiring Recom- Remarks Diagram mended Part No. Part Name Specification PMP- PMP- (Drawing No.) Symbol Q'ty 40BM 40BMW AIR OUTLET GRILLE T7W E16 003 AIR OUTLET GRILLE T7W E22 003 LATCH —...
  • Page 34 FUNCTIONAL PARTS PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2 PMFY-P20VBM-ER3 PMFY-P25VBM-ER3 13, 15 PMFY-P32VBM-ER3 PMFY-P40VBM-ER3 Part number that is circled is not shown in the figure. Q'ty/set Wiring Recom- PMFY- Remarks Part No. Part Name Specifi...
  • Page 35 ELECTRICAL PARTS PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2 PMFY-P20VBM-ER3 PMFY-P25VBM-ER3 PMFY-P32VBM-ER3 PMFY-P40VBM-ER3 Q'ty/set Wiring Recom- Remarks Part No. Part Name Specifi cation PMFY-P20/25/32/40 Diagram mended (Drawing No.) Symbol Q'ty P·VBM-E P·VBM-E P·VBM-E#2 P·VBM-ER3 — CONTROL BOX (RG02B337G23) T7W E32 716...
  • Page 36 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN cCopyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Oct. 2009 No. OC307 REVISED EDITION-D PDF 7 Distributed in Sep. 2008 No. OC307 REVISED EDITION-C PDF 7 Distributed in Jul. 2007 No. OC307 REVISED EDITION-B PDF 8 New publication, effective Oct.

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