Mitsubishi Electric City Multi PMFY-P20VBM-E Technical & Service Manual Download

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TECHNICAL & SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Indoor unit
[Model names] [Service Ref.]

No. OC307

REVISED EDITION-E

INDOOR UNIT

CONTENTS

1. TECHNICAL CHANGES.....................2

2. SAFETY PRECAUTION .....................3

3. PART NAMES AND FUNCTIONS ......5

4. SPECIFICATIONS ............................12

5. OUTLINES AND DIMENSIONS .......16

6. WIRING DIAGRAM ...........................17

7. REFRIGERANT SYSTEM DIAGRAM .... 21

8. TROUBLE SHOOTING .....................22

9. DISASSEMBLY PROCEDURE .........32

10. RoHS PARTS LIST ...........................36

Ceiling Cassettes

Series PMFY

R410A

December 2012

Note:

•

This manual describes

only service data of the
indoor units.

•

RoHS compliant products

have <G> mark on the
spec name plate.

•

For servicing RoHS com-

pliant products, refer to
the RoHS Parts List.

Revision:

•

PMFY-P20/25/32/40VBM-ER4

have been added in

REVISED EDITION-E.

•

Some descriptions have

been modified.

•

Please void OC307

REVISED EDITION-D.

PMFY-P20VBM-E

PMFY-P25VBM-E

PMFY-P32VBM-E

PMFY-P40VBM-E

PMFY-P20VBM-E

PMFY-P20VBM-E#2

PMFY-P20VBM-ER4

PMFY-P25VBM-E

PMFY-P25VBM-E#2

PMFY-P25VBM-ER4

PMFY-P32VBM-E

PMFY-P32VBM-E#2

PMFY-P32VBM-ER4

PMFY-P40VBM-E

PMFY-P40VBM-E#2

PMFY-P40VBM-ER4

PMFY-P20VBM-E

PMFY-P20VBM-ER3

PMFY-P25VBM-E

PMFY-P25VBM-ER3

PMFY-P32VBM-E

PMFY-P32VBM-ER3

PMFY-P40VBM-E

PMFY-P40VBM-ER3

Summary of Contents for City Multi PMFY-P20VBM-E

Page 1: ...nly service data of the indoor units RoHS compliant products have G mark on the spec name plate For servicing RoHS com pliant products refer to the RoHS Parts List Revision PMFY P20 25 32 40VBM ER4 have been added in REVISED EDITION E Some descriptions have been modified Please void OC307 REVISED EDITION D PMFY P20VBM E PMFY P25VBM E PMFY P32VBM E PMFY P40VBM E PMFY P20VBM E PMFY P20VBM E 2 PMFY P...

Page 2: ... changed 2 PANEL has been changed PMP 40BM PMP 40BMW White 0 98Y 8 99 0 63 Pure white 6 4Y 8 9 0 4 3 FAN MOTOR MF has been changed 4 THERMISTOR TH22 TH23 have been changed 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 ER3 PMFY P20V...

Page 3: ...or If large amount of mineral oil enters that can cause deterio ration of refrigerant oil etc Ventilate the room if refrigerant leaks during operation If refrigerant comes into contact with a flame poisonous gases will be released Use new refrigerant pipes In case of using the existing pipes for R22 be careful with the followings Change flare nut to the one provided with this product Use a newly f...

Page 4: ... the cylinder of syphon stood vertically Refrigerant is charged from liquid phase Gravimeter Unit 3 Service tools Use the below service tools as exclusive tools for R410A refrigerant No Tool name Specifications 1 Gauge manifold Only for R410A Use the existing fitting specifications UNF1 2 Use high tension side pressure of 5 3MPa G or over 2 Charge hose Only for R410A Use pressure performance of 5 ...

Page 5: ... changed to horizontal by moving the Guide vane to the left or right Air intake Returns air from room Filters Remove dust and pollutants from return air Auto Air Swing Vane Disperses airflow up and down and adjusts the angle of airflow direction Horizontal Air Outlet OC307E ...

Page 6: ... error ON OFF lamp Main display Press to change the operation mode Main menu Press to move the cursor down Function button F1 Main display Press to decrease temperature Main menu Press to move the cursor up Function button F2 Main display Press to increase temperature Main menu Press to go to the previous page Function button F3 Main display Press to change the fan speed Main menu Press to go to t...

Page 7: ... ON OFF operation is centrally controlled Appears when the operation mode is centrally controlled Appears when the preset temperature is centrally controlled Appears when the filter reset function is centrally controlled Indicates when filter needs maintenance Current room temperature appears here Room temperature See the Installation Manual Appears when the buttons are locked Appears when the On ...

Page 8: ...ver Vent Lossnay High power Weekly timer Restriction Maintenance Initial setting On Off timer Auto Off timer Temp range Operation lock Manual vane angle Main Sub Timer Main display Contrast Display details Auto mode Administrator password Language selection Service Service menu Input maintenance info Function setting Lossnay City Multi only Check Self check Maintenance password Remote controller c...

Page 9: ...operate at the preset temperature after performing energy save operation for a specified time period Time can be set to a value from 30 and 120 in 10 minute increments This function will not be valid when the preset temperature ranges are restricted Schedule Set the start stop times to operate the units in the energy save mode for each day of the week and set the energy saving rate Up to four ener...

Page 10: ...ance Select Input maintenance Info from the Service menu to bring up the Maintenance information screen The following settings can be made from the Maintenance Information screen Model name input Serial No input Dealer information input Function setting Make the settings for the indoor unit functions via the remote controller as necessary LOSSNAY setting City Multi only This setting is required on...

Page 11: ... display range is 8 39 The display blinks if the temperature is less than 8 or 39 or more Louver display Indicates the action of the swing louver Does not appear if the louver is not running Power On indicator Indicates that the power is on Fan Speed indicator Shows the selected fan speed Ventilation indicator Appears when the unit is running in Ventilation mode Operation Section Temperature setti...

Page 12: ...ooling Heating Current PMFY P20VBM E PMFY P20VBM E1 PMFY P20VBM E 2 PMFY P20VBM ER3 PMFY P20VBM ER4 PMFY P25VBM E PMFY P25VBM E1 PMFY P25VBM E 2 PMFY P25VBM ER3 PMFY P25VBM ER4 PMFY P32VBM E PMFY P32VBM E1 PMFY P32VBM E 2 PMFY P32VBM ER3 PMFY P32VBM ER4 PMFY P40VBM E PMFY P40VBM E1 PMFY P40VBM E 2 PMFY P40VBM ER3 PMFY P40VBM ER4 Single phase 220V 230V 240V 50Hz 220V 60Hz 2 2 2 5 0 042 0 042 0 20 0...

Page 13: ...in sensor Linear expansion valve PMFY P20VBM E PMFY P20VBM E1 PMFY P20VBM E 2 PMFY P20VBM ER3 PMFY P20VBM ER4 PMFY P25VBM E PMFY P25VBM E1 PMFY P25VBM E 2 PMFY P25VBM ER3 PMFY P25VBM ER4 PMFY P32VBM E PMFY P32VBM E1 PMFY P32VBM E 2 PMFY P32VBM ER3 PMFY P32VBM ER4 PMFY P40VBM E PMFY P40VBM E1 PMFY P40VBM E 2 PMFY P40VBM ER3 PMFY P40VBM ER4 Room temperature thermistor Fuse Indoor controller board Fa...

Page 14: ...thin 10m Be sure to secure insulation material by tape etc 5 Green Yellow Orange Connector 5P Indoor unit side Multiple remote controller adapter PAC SA88HA E Be sure to secure insulation material by tape etc CN51 on indoor unit board Red Brown MB Q 0 B A C Curve in the right graphs Duct characteristics at site Q A E C Q Qa A D Operation in conjunction with duct fan Booster fan Whenever the indoor...

Page 15: ...ING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 BAND CENTER FREQUENCIES Hz PMFY P25 32VBM E PMFY P25 32VBM E1 PMFY P25 32VBM E 2 PMFY P25 32VBM ER3 PMFY P25 32VBM ER4 High NOTCH Medium1 Medium2 Low 37 SPL dB 36 34 32 LINE OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 μbar 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NO...

Page 16: ...r transmission 812 96 Left side Front drain pan Electrical box Drainage pipe PVC pipe VP 20 I D W26 Refrigerant pipe gas O D W12 7 Refrigerant pipe liquid O D W6 35 Ceiling panel Drain pan Ceiling panel O D W12 7 1 2 PVC pipe VP 20 O D W26 1 O D W6 35 1 4 O D W43 Drainage piping Gas pipe Liquid pipe Pipe cover Refrigerant piping 1000 outer side of grille 470 outer side of grille W50 56 230 96 20 1...

Page 17: ...age Set SW5 to 240V side when the power supply is 230 and 240 volts When the power supply is 220 volts set SW5 to 220V side CN32 I B TH23 TH21 CN21 WHT LIQUID CN29 BLK GAS CN20 RED INTAKE TH22 CN31 WHT DRAIN 6 4 DS SHIELD M1 M2 TB5 TO OUTDOOR UNIT BC CONTROLLER DC24 30V CN2M BLU M NET REMOTE CONTROLLER 5 FUSE MV LEV MF PULL BOX 1 5 1 5 CN51 WHT CENTRALLY CONTROL 1 HA CN41 WHT RED ADDRESS CN81 CN42...

Page 18: ...PIPE TEMP DETECTION LIQUID 0 15k 25 5 4k PIPE TEMP DETECTION GAS 0 15k 25 5 4k TH22 TH23 DRAIN SENSOR FAN MOTOR VANE MOTOR DRAIN PUMP TB2 TB5 TB15 TRANSMISSION MA REMOTE CONTROLLER TERMINAL BLOCK POWER SUPPLY A B CIRCUIT BOARD SW1 SW5 SW11 SW12 MODE SELECTION VOLTAGE SELECTION ADDRESS SETTING 1s DIGIT ADDRESS SETTING 10ths DIGIT SW14 BRANCH No SWITCH LEV LINEAR EXPANSION VALVE MF 1 6 3 MS 3 L N M1...

Page 19: ...le below 7 Please set the switch SW5 according to the power supply voltage Set SW5 to 240V side when the power supply is 230 and 240 volts When the power supply is 220 volts set SW5 to 220V side Mark Meaning Function Power supply for MA Remote controller Main power supply Indoor unit 220 240V Power on Iamp is lit LED on indoor board for service LED1 Main power supply Power supply for MA Remote con...

Page 20: ... used in wiring diagram above are terminal block connecter 6 The setting of the SW2 dip switches differs in the capacity For the detail refer to the table below 7 Please set the switch SW5 according to the power supply voltage Set SW5 to 240V side when the power supply is 230 and 240 volts When the power supply is 220 volts set SW5 to 220V side Mark Meaning Function Power supply for MA Remote cont...

Page 21: ...0 PMFY P20 P25 P32 P40VBM E PMFY P20 P25 P32 P40VBM E1 PMFY P20 P25 P32 P40VBM E 2 PMFY P20 P25 P32 P40VBM ER3 PMFY P20 P25 P32 P40VBM ER4 PMFY P20 P25VBM E PMFY P20 P25VBM E1 PMFY P20 P25VBM E 2 PMFY P20 P25VBM ER3 PMFY P20 P25VBM ER4 PMFY P32 P40VBM E PMFY P32 P40VBM E1 PMFY P32 P40VBM E 2 PMFY P32 P40VBM ER3 PMFY P32 P40VBM ER4 PMFY P20VBM E PMFY P25VBM E PMFY P32VBM E PMFY P40VBM E PMFY P20VBM...

Page 22: ...stance between the terminals with a tester At the ambient temperature 20 Measure the resistance after 3 minutes have passed since the power supply was intercepted At the ambient temperature 0 60 Vane motor MV Linear expansion valve LEV Drain pump DP Drain sensor DS Refer to the next page for the details Refer to the next page for the details Refer to the next page for the details Room temperature ...

Page 23: ...0k 3 Fixed number of B 3390 2 Rt 6exp 3390 0 6 k 10 3 9k 20 2 6k 25 2 2k 30 1 8k 40 1 3k Thermistor for lower temperature Linear expansion valve 1 Operation summary of the linear expansion valve Linear expansion valve open close through stepping motor after receiving the pulse signal from the indoor controller board Valve position can be changed in proportion to the number of pulse signal Connecti...

Page 24: ...r expansion valve mechanism is locked Valve does not close completely thermis tor leaking Wrong connection of the connector or contact failure To check the linear expansion valve operate the indoor unit in fan mode and at the same time operate other indoor units in cooling mode then check the pipe temperature liquid pipe temperature of the indoor unit by the outdoor multi controller board operatio...

Page 25: ...r board with the connector FAN CNMF1 2 connected to the board Approx 310 340V DC between the connecter FAN and CNMF1 and CNMF2 Check method of indoor fan motor fan motor controller board Replace the indoor controller board Is the voltage normal Yes No Indoor controller board fuse check Wiring contact check Contact of fan motor connector FAN CNMF1 2 No No Wiring recovery Replace the drain pump Is t...

Page 26: ...able Available Second setting 4 Horizontal angle Effective Not effective Heat pump Cool only Louver Vane Vane swing function Vane horizontal angle Vane cooling limit angle setting 2 Heating 4deg up Target superheat setting 3 Target sub cool setting 3 Heat pump Not available Not available Not available First setting Down B C Not effective Effective 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 SW1 Mode...

Page 27: ...nitial setting Address board SW12 10 SW11 1 SW12 SW11 SW14 SW14 Initial setting 220V 240V Switch Remarks Effective timing Before power supply ON Operation by switch Pole SW11 1s digit address setting SW12 10ths digit address setting SW14 Branch No setting How to set addresses Example If address is 3 remain SW12 for over 10 at 0 and match SW11 for 1 to 9 with 3 How to set branch numbers SW14 Series...

Page 28: ...cting wire Between 1 to 3 8 7 13V DC Pin1 CN29 Pipe temperature thermistor Gas TH23 CN21 Pipe temperature thermistor Liquid TH22 LED2 Power supply for MA Remote controller CN60 Linear expansion valve output LEV CN31 Drain sensor DS CN20 Room temperature thermistor TH21 CN41 Connector HA terminal A CN6V Vane motor output MV CN32 Connector Remote switch SW4 Model selection SW3 Mode selection SW2 Cap...

Page 29: ... ON 1 3 Cooling Dry status lamp 12VDC 1 1 4 Heating status lamp 12VDC 1 CNMF1 CNMF2 FAN motor CNMF11 CNMF21 310 340V DC CNMF27 1 0 15V DC CN2M Connect to the terminal block TB5 M NET transmission connecting wire 24 30V DC non polar LED2 Power supply for MA Remote controller CN3A MA Remote controller connecting wire 1 3 8 7 13V DC Pin 1 CN6V1 Vane motor CN32 Connector Remote switch SW2 Capacity set...

Page 30: ...supply CN52 Remote indicator 1 2 Status lamp 12VDC 1 Fan motor output SW1 5 OFF Thermostat ON SW1 5 ON 1 3 Cooling Dry status lamp 12VDC 1 1 4 Heating status lamp 12VDC 1 SW2 Capacity setting SW3 Function setting SW4 Model setting CNMF1 CNMF2 FAN motor CNMF11 CNMF21 310 340V DC CNMF27 1 0 15V DC CN2M Connect to the terminal block TB5 M NET transmission connecting wire 24 30V DC non polar CN105 CN3...

Page 31: ... P40VBM E1 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 PMFY P20VBM ER4 PMFY P25VBM ER4 PMFY P32VBM ER4 PMFY P40VBM ER4 SW1 Function setting SW5 Voltage selector SW12 Address setting 10ths DIGIT SW11 Address setting 1s DIGIT SW14 Branch No OC307E ...

Page 32: ...ille Points for securing the grille Drainage pan Ceiling surface Make sure these surfaces are flush with each other 0 3 mm Checks before setting the grille in place 1 Before installing the grille make sure the indoor unit is square with the ceiling opening or parallel to the angle between the wall and the ceiling 2 Check that the 4 points where the grille will be secured are in contact with the ce...

Page 33: ...ight leaving them slightly loose 4 Tighten the securing bolts A and securing screws B in the centre 3 places See Figure 6 5 Tighten the securing bolts A in the 4 places at left and right Make sure there are no gaps between the indoor unit and the grille and between the grille and the ceiling surface If there are gaps the wind may come in and it may cause water to drip See Figure 8 Tighten the secu...

Page 34: ...uble layer insulation without fail The hard material side should be faced to the nozzle See Figure 9 1 Remove the grille 2 Remove the room temperature thermistor 3 Unhook the claws in the middle of nozzle and remove the drain pan 5 screws See Photo 2 4 Remove the nozzle side of the heat exchanger 2 screws 5 Remove the address board cover See Photo 3 6 Remove the electrical parts cover See Photo 3 ...

Page 35: ...emove the fan motor and line flow fan The fan motor and line flow fan can be removed without removing the heat exchanger Photo 6 Drain pump Fan motor Drain sensor Photo 7 Fan motor Line flow fan 7 Removing the thermistor Intake temperature detector 1 Remove the grille 2 Remove the address board cover See Photo 3 3 Remove the electrical parts cover See Photo 3 4 Remove the thermistor intake tempera...

Page 36: ...K GRILLE CATCH L L FILTER L L FILTER INTAKE GRILLE INTAKE GRILLE GRILLE CATCH RECEIVER COVER MAGNET SCREW CAP SCREW CAP SCREW ASSY No RoHS Part No Part Name Specification Q ty set Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty PMP 40BM for PANEL T7W E16 003 T7W E22 003 R01 E01 055 R01 E01 099 R01 E07 054 R01 E14 500 R01 E15 500 T7W E04 691 T7W E06 691 R01 E06 054 R01 E01 648 R01 E01 04...

Page 37: ...ion Q ty set Remarks Drawing No Wiring Diagram Symbol PMFY P20 25 32 40 VBM E VBM E1 VBM E 2 VBM ER3 VBM ER4 1 G CONTROL BOX 1 1 1 1 1 RG02B337G26 2 G T7W E32 716 TERMINAL BLOCK 3P L N 1 1 1 1 1 TB2 3 G T7W E35 716 TERMINAL BLOCK 3P M1 M2 S 1 1 1 1 1 TB5 4 G R01 E44 246 TERMINAL BLOCK 2P 1 2 1 1 1 1 1 TB15 5 G T7W E01 294 ADDRESS BOARD 1 1 1 1 1 A B 6 G R01 E10 304 CABLE ASSY 1 1 1 1 1 7 G R01 E06...

Page 38: ...P32VBM E1 PMFY P40VBM E1 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 PMFY P20VBM ER4 PMFY P25VBM ER4 PMFY P32VBM ER4 PMFY P40VBM ER4 RoHS PARTS LIST 17 18 19 2 27 20 12 11 13 1 3 31 14 28 29 4 5 6 30 10 15 16 7 8 9 21 26 25 22 23 24 23 OC307E ...

Page 39: ...0 CASING 1 1 1 1 1 1 1 1 1 1 15 G R01 E01 079 STABILIZER ASSY 1 1 1 1 1 1 1 1 1 1 16 G R01 E18 223 VANE MOTOR 1 1 1 1 1 1 1 1 1 1 MV 17 G R01 E02 092 VANE SLEEVE 1 1 1 1 1 1 1 1 1 1 18 G R01 E03 092 VANE SLEEVE 1 1 1 1 1 1 1 1 1 1 19 G R01 E16 002 VANE 1 1 1 1 1 1 1 1 1 1 20 G R01 E03 038 GUIDE VANE 1 1 1 1 1 1 1 1 1 1 21 G T7W H06 480 HEAT EXCHANGER 1 1 G T7W H07 480 HEAT EXCHANGER 1 1 G T7W H94 ...

Page 40: ...E 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 Distributed in Jul 2006 No OC307 REVISED EDITION A PDF 8 Distributed in Apr 2004 No OC307 PDF 9 Made in Japan New publication effective Dec 2012 Specifications are subject to change without notice ...

Page 41: ...FY P20VBM E PMFY P20 40VBM_Declaration_of_Conformity_ CE2013A09 PMFY P20 40VBM_Installation_Manual_ BG79U328H02 PMFY P20 40VBM_Instruction_Book_ RG79D837H01 PMFY P20 40VBM_Parts_Manual_ OC307E PMFY P20 40VBM_Service_Manual_ OC307E ...

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