Mitsubishi PMFY-P20VBM-A, PMFY-P20VBM-A1, PMFY-P25VBM-A, PMFY-P25VBM-A1, PMFY-P32VBM-A Service Manual

SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

2001

No. OC248

REVISED EDITION-A

Series PMFY

Indoor unit
[Model names] [Service Ref.]

PMFY-P20VBM-A PMFY-P20VBM-A

Ceiling Cassettes

R407C

PMFY-P20VBM-A

PMFY-P25VBM-A PMFY-P25VBM-A

PMFY-P25VBM-A

PMFY-P32VBM-A PMFY-P32VBM-A

PMFY-P32VBM-A

PMFY-P40VBM-A PMFY-P40VBM-A

PMFY-P40VBM-A

CONTENTS

R22

1

1

1

1

• PMFY-P20VBM-A1,
PMFY-P25VBM-A1,
PMFY-P32VBM-A1,
PMFY-P40VBM-A1
are added in
Revised Edition-A.

• Please destroy OC248.

INDOOR UNIT

1. TECHNICAL CHANGE·························2

2. SAFETY PRECAUTION ·······················2

3. PART NAMES AND FUNCTIONS········4

4. SPECIFICATION···································6

5. OUTLINES AND DIMENSIONS··········10

6. WIRING DIAGRAM·····························11

7.

REFRIGERANT SYSTEM DIAGRAM

8. TROUBLE SHOOTING ·······················13

9. DISASSEMBLY PROCEDURE ···········19

10. PARTS LIST········································22

···12

1

TECHNICAL CHANGES

PMFY-P20VBM-A PMFY-P20VBM-A1
PMFY-P25VBM-A PMFY-P25VBM-A1
PMFY-P32VBM-A PMFY-P32VBM-A1
PMFY-P40VBM-A PMFY-P40VBM-A1

● INDOOR CONTROLLER BOARD(I.B) has changed.

● DRAIN PAN has changed.

2

SAFETY PRECAUTION

Cautions for using with the outdoor unit which adopts R407C refrigerant.

· Do not use the existing refrigerant piping.

-The old refrigerant and lubricant in the existing piping contains a large amount of chlorine which may cause the lubricant
deterioration of the new unit.

· Use “low residual oil piping”.

-If there is a large amount of residual oil (hydraulic oil, etc.) inside the piping and joints, deterioration of the lubricant will result.

· Store the piping to be used during installation indoors with keep both ends sealed until just before brazing.
(Store elbows and other joints in a plastic bag.)

-If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result.

· Use ESTR , ETHER or HAB as the lubricant to coat flares and flange connection parts.

Use liquid refrigerant to seal the system.

-If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance

may drop.

· Do not use a refrigerant other than R407C.

-If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the lubricant deterioration.

· Use a vacuum pump with a reverse flow check valve.

-The vacuum pump oil may flow back into the refrigerant cycle and cause the lubricant deterioration.

2

[1] Service tools

Gravimeter

Unit

Use the below service tools as exclusive tools for R407C refrigerant.

No. Tool name Specifications

1 Gauge manifold ·Only for R407C.

·Use the existing fitting SPECIFICATIONS. (UNF7/16)

·Use high-tension side pressure of 3.43MPa·G or over.

2 Charge hose ·Only for R407C.

·Use pressure performance of 5.10MPa·G or over.

3 Electronic scale
4 Gas leak detector ·Use the detector for R134a or R407C.
5 Adapter for reverse flow check. ·Attach on vacuum pump.
6 Refrigerant charge base.
7 Refrigerant cylinder. ·For R407C ·Top of cylinder (Brown)

·Cylinder with syphon

8 Refrigerant recovery equipment.

[2] Notice on repair 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.

[3] Refrigerant recharging

(1) Refrigerant recharging process

1Direct charging from the cylinder.

·R407C cylinder are available on the market has a syphon pipe.

·Leave the syphon pipe cylinder standing and recharge by liquid refrigerant

.

(2) Recharge in refrigerant leakage case

·After recovering the all refrigerant in the unit, proceed to working.

·Do not release the refrigerant in the air.

·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.

3

3

PAR-20MAA

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN
FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY
DEFROST

FILTER

CHECK TEST

TEMP.

TIMER SET

Press this button to switch the cooler,
electronic dry (dehumidify), automatic
and heater modes.

OPERATION SWITCH button

This sets the room temperature. The
temperature setting can be performed
in 1: units
Setting range
Cooler 19: to 30:
Heater 17: to 28:

TEMP. ADJUSTMENT button

This switches between continuous
operation and the timer operation.

TIMER button

This switches between the operation
and stop modes each time it is pressed.
The lamp on this button lights during
operation.

ON/OFF button

Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation.

CHECK-TEST RUN button

This switch the horizontal fan motion
ON and OFF.

(Not available for this model.)

LOUVER button

This adjusts the vertical angle of the
ventilation.

AIR DIRECTION button

This resets the filter service indication
display

FILTER button

This sets the current time, start time
and stop time.

TIME SETTING button

This sets the ventilation fan speed.

AIR SPEED button

PART NAMES AND FUNCTIONS

● Indoor (Main) Unit

Horizontal Air Outlet

Auto Air Swing Vane

Disperses airflow up and
down and adjusts the angle
of airflow direction.

Guide vane

Air flow can be changed to horizontally
by moving the Guide vane to the left or right.

Filters

Remove dust and pollutants
from return air.

● Remote controller

● Operation buttons

Air intake

Returns air from room.

[PAR-20MAA]

● Once the controls are set, the same operation mode can
be repeated by simply pressing the ON/OFF button.

4

● Display

PAR-20MAA

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN
FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY
DEFROST

FILTER

CHECK TEST

TEMP.

TIMER SET

CENTRALLY
CONTROLLED display

This indicates when the unit is con-

trolled by optional features such as
central control type remote controller.

TIMER display

This indicates when the continuous

operation and time operation modes
are set.

It also display the time for the timer

operation at the same time as when
it is set.

OPERATION MODE display

This indicates the operation mode.

STANDBY display

The [STANDBY] symbol is only
displayed from the time the heating

operation starts unit the heated air
begins to blow.

DEFROST display

This indicates when the defrost oper-

ation is performed.

CLOCK display

The current time , start time and stop

time can be displayed in ten second
intervals by pressing the time switch
button. The start time or stop time is
always displayed during the timer
operation.

In this display example on the bot­tom left, a condition where all dis­play lamps light is shown for expla­nation purposes although this differs
from actual operation.

AIR DIRECTION display

This displays the air direction.

AIR SPEED display

The selected fan speed is displayed.

ROOM TEMPERATURE display
The temperature of the suction air

is displayed during operation. The

display range is 8°C to 39°C. The
display flashes 8°C when the actual
temperature is less than 8°C and
flashes 39°C when the actual tem­perature is greater than 39°C.

Operation lamp

This lamp lights during operation,
goes off when the unit stops and
flashes when a malfunction occurs.

This display lights in the check mode
or when a test operation is per­formed.

CHECK MODE

TEST RUN

display

FILTER display

CHECK display

This indicates when a malfunction

has occurred in the unit which should
be checked.

SET TEMPERATURE display

This displays the selected setting

temperature.

Caution

● Only the Power display lights when the unit is stopped and power supplied to the unit.

● When the central control remote control unit, which is sold separately, is used the ON-OFF button, operation switch button

and TEMP. adjustment button do not operate.

● “NOT AVAILABLE” is displayed when the Air speed button are pressed.This indicates that this room unit is not equipped
with the fan direction adjustment function and the louver function.

● When power is turned ON for the first time, it is normal that “H0” is displayed on the room temperature indication (For max.
2minutes). Please wait until this “H0” indication disappear then start the operation.

POWER display

This lamp lights when electricity is
supplied to the unit.

This lamp lights when the filter need
to be cleaned.

5

4

Item

V

·Hz

kW
kW
kW
kW

A
A

—
mm
mm
mm

—

—

k/min

Pa

kW

—

—

[mm(in.)
[mm(in.)

[mm

dB

kg

Cooling capacity

Power

Heat exchanger

Insulator

Air filter

Fan ✕ No

Air flow W3

Pipe

dimensions

Unit drain pipe size
Noise level W3
Product weight

Exterior

(munsell symbol)

Fan motor

output

External

static pressure

Liquid

side

Gas
side

Heating capacity

F

a

n

Dimensions

Height

Width
Depth

Electric characteristic

Input

Cooling

Heating

Cooling

Heating

Current

PMFY-P20VBM-A

PMFY-P20VBM-A

1

PMFY-P25VBM-A

PMFY-P25VBM-A

1

PMFY-P32VBM-A

PMFY-P32VBM-A

1

PMFY-P40VBM-A

PMFY-P40VBM-A

1

Single phase 220V-230V-240V 50Hz / 220V 60Hz

2.2

2.5

0.042

0.042

0.20

0.20

2.8

3.2

0.044

0.044

0.21

0.21

3.6

4.0

0.044

0.044

0.21

0.21

4.5

5.0

0.054

0.054

0.26

0.26

9.3-8.6-8.0-7.3

37-36-34-32

8.7-8.0-7.2-6.5

35-33-30-27

10.7-9.7-8.7-7.7

39-37-35-33

Unit : Galvanized sheets · Standard grills : ABS resin acrylic coating Munsell<0.98Y 8.99/0.63>

230<30>

812<1,000>

395<470>

Cross fin

Line flow fan ✕ 1

0

0.028

Polyethylene sheet

PP honey comb fabric

12.7(1/2")

6.35(1/4")

I.D.26 (PVC pipe VP-20 connectable)

14<3.0>

SPECIFICATION

4-1. Specification

Note 1. Rating conditions

Note 2. The number indicated in < > is just for the grille.

W 3. Air flow and the noise level are indicated as High-Middium 1-Middium 2-Low.

Cooling: Indoor: D.B. 27°C W.B. 19.0°C
Heating: Indoor: D.B. 20°C

outdoor: D.B. 35°C
outdoor: D.B. 7°C W.B. 6°C

6

4-2. Electrical parts specifications

Parts name

Model

Symbol

TH21

TH22

TH23

FUSE

MF

MV

DP

DS

LEV

TB2

TB5

TB15

Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.2k", 30:/4.3k", 40:/3.0k"

Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.2k", 30:/4.3k", 40:/3.0k"

Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.2k", 30:/4.3k", 40:/3.0k"

250V 6.3A

Thermistor resistance 0:/6k", 10:/3.9k", 20:/2.6k", 25:/2.2k", 30:/1.8k", 40:/1.3k"

(L, N, ;) 330V 30A

(M1, M2, S) 250V 20A

(1,2) 250V 10A

Liquid pipe thermistor

Gas pipe thermistor

Drain-up mechanism

Drain sensor

Linear expansion valve

PMFY-P20VBM-A

PMFY-P20VBM-A

1

PMFY-P25VBM-A

PMFY-P25VBM-A

1

PMFY-P32VBM-A

PMFY-P32VBM-A

1

PMFY-P40VBM-A

PMFY-P40VBM-A

1

Room temperature
thermistor

Fuse
(Indoor controller board)

Fan motor

Vane motor

Power supply
terminal block

Transmission
terminal block

DC Brushless Motor

8-pole OUTPUT 28W

PN0H28-MA

MSFJC 20M23

12V/380

"

PJV-1046

220-240V 50/60Hz

DC12V Stepping motor drive port

(0~2000pulse)

EDM-402ME

MA-remote controller

terminal block

7

4-3. Air capacity taken from outside

50.0

-50.0

-100.0

0.0 0.5 1.0
Air flow (m

3

/min)

2 intakes

1 intake

Characteristic diagram of air capacity taken from outside of PMFY-P·VBM

Static pressure (Pa)

1.5 2.0 2.5

0.0

PMFY-P20VBM-A
PMFY-P20VBM-A

1

PMFY-P25VBM-A
PMFY-P25VBM-A

1

PMFY-P32VBM-A
PMFY-P32VBM-A

1

PMFY-P40VBM-A
PMFY-P40VBM-A

1

8.7m3/min

9.3m3/min

9.3m3/min

10.7m3/min

Max 1.74m3/min
Max 1.86m3/min
Max 1.86m3/min
Max 2.14m3/min

Air flow

(Hi)

Air capacity taken outside

Service Ref.

(Knock out)

4-{2.8

Fresh air intake hole

(Knock out)

Fresh air intake hole

90-

{

122

{

100

108

250 288.5

Installation at site

1

~

CN51

Multiple remote
controller adapter
PAC-SA88HA-E

Indoor controller board

Distance between indoor
controller board and relay
must be within 10m.

Be sure to secure insulation
material by tape and such

5

Green

Yellow

Orange

Connector (5P)

Package side

Multiple remote
controller adapter
PAC-SA88HA-E

Be sure to secure insulation
material by tape and such

CN51
on
indoor unit
board

Red

Brown

MB

Q

0

B

A

C

1

2

3

Curve in the
rigth graphs.

Duct characteristics
at site

Q

A

E C

Q

Qa

A D



PMFY-P·VBM-A series are possible to be taken air from outside.
When taking air from the outside, the duct fan can be used to.
The air capacity should be 20% or less of the air flow SPEC(Hi).

Interlocking operation method with duct fan

(Booster fan)

●Whenever the indoor unit is operating, the duct fun also
operates.
(1)Connect the optional multiple remote controller

adapter(PAC-SA88HA-E)to the connector CN51 on the
indoor controller board.

(2)Drive the relay after connecting the 12V DC relay

between the Yellow and Orange connector lines.

(w)Use a relay under 1W.
MB: Electromagnetic switch power relay for duct fan.

X: Auxiliary relay (12V DC LY-1F)

How to read curves

Q…Planned amount of fresh air intake
A…Static pressure loss of fresh air

intake duct system with air flow
amount Q

B…Forced static pressure at air condi-

tioner inlet with air flow amount Q

C…Static pressure of booster fan with

air flow amount Q

D…Static pressure loss increase

E…Static pressure of indoor unit with
Qa…Estimated amount of fresh air

amount of fresh air intake dust
system for air flow amount Q

air flow amount Q

intake with out D <m3/min>

3

<m

/min>

<Pa>

<Pa>
<Pa>

<Pa>
<Pa>

8

4-4. NOISE CRITERION CURVES

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING
FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

PMFY-P20VBM-A
PMFY-P20VBM-A

1

Hi

NOTCH

Mi1
Mi2

Lo

35

SPL(dB)

33
30
27

LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

PMFY-P25VBM-A
PMFY-P25VBM-A

1

PMFY-P32VBM-A
PMFY-P32VBM-A

1

Hi

NOTCH

Mi1
Mi2

Lo

37

SPL(dB)

36
34
32

LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

PMFY-P40VBM-A
PMFY-P40VBM-A

1

Hi

NOTCH

Mi1
Mi2

Lo

39

SPL(dB)

37
35
33

LINE

UNIT

1.5m

MICROPHONE

CEILING

Ambient temperature 27:
Test conditions are based on JIS Z8731

9

5

Details of fresh air intake hole

Knock out

4-{2.8 Burring hole

Fresh air intake hole

110

230

235 or more

110

suspension bolt(M10 or W 3/8)

Panel(grille):PMP-40BM

Installation space required around indoor unit

mounting plate

176

Panel(grille):PMP-40BM

Lower view

60 40

200600200

Top

Air outlet(lower)

46

43

2828

20

26

20

53

69

247

30

Right side

outer line of grille

center of unit

75926

811 suspension bolt pitch74.5

960 ceiling opening20 20

1000 outer side of grille

17.517.5

45

340 suspension bolt pitch

45

430 ceiling opening

470 outer side of grille

20

20

74.5

Terminal block for power supply

Terminal block for transmission

812

96

Left side

Front

drain pan

elect box

Drainage pipe

PVC pipe:VP-20[I.D.{26]

Refrigerant pipe(gas)

O.D.{12.7

Refrigerant

pipe(liquid)

O.D.{6.35

ceiling panel

drain pan

ceiling

panel

O.D.{12.7(1/2")

PVC pipe:VP-20[I.D.{26(1")]

O.D.{6.35(1/4")

O.D.{43

Drainage piping

Gas pipe

Liquid pipe

pipe cover

Refrigerant

piping

1000 outer side of grille

470 outer side of grille

{50

(56)

230

(96)

(20)
(10)

302

254

198

141 759

395

90-

{

122

{

100

108

250 288.5

same line

Terminal block for

MA remote controller

OUTLINES AND DIMENSIONS

PMFY-P20VBM-A, PMFY-P20VBM-A1
PMFY-P20VBM-A, PMFY-P20VBM-A1
PMFY-P32VBM-A, PMFY-P32VBM-A1
PMFY-P40VBM-A, PMFY-P40VBM-A1

Unit : mm

10

6

NAME

NAME

SYMBOL
I.B

SYMBOL
MF
MV
DP
DS
TB2
TB5
TB15
TH21

TH22
TH23
LEV

POWER SUPPLY
TRANSMISSION
MA-REMOTE CONTROLLER
ROOM TEMPERATURE DETECTION
(0:/15k", 25:/5.4k")
PIPE TEMPERATURE DETECTION/LIQUID
(0:/15k", 25:/5.4k")
PIPE TEMPERATURE DETECTION/GAS
(0:/15k", 25:/5.4k")

FAN MOTOR
VANE MOTOR
DRAIN WATER LIFTING-UP MACH.
DRAIN SENSOR
TERMINAL
BLOCK

THERMISTOR

LINEAR EXPANSION VALVE

A.B

CN25
CN27
CN32
CN41
CN51
CN52
SW2
SW3
SW4
ZNR
FUSE
X1
T
LED1
LED2

SW1
SW5
SW11
SW12
SW14

HUMIDIFIER
DAMPER
REMOTE SWITCH
HA TERMINAL-A
CENTRALLY CONTROL
REMOTE INDICATION
CAPACITY CODE
MODE SELECTION
MODEL SELECTION

DRAIN PUMP

MODE SELECTION
VOLTAGE SELECTION
ADDRESS SETTING 1ST DIGIT
ADDRESS SETTING 2ND DIGIT
CONNECTION NO.

INDOOR CONTROLLER BOARD
CONNECTOR

SWITCH

VARISTOR
FUSE(6.3A/250V)
AUX.RELAY
TRANSFORMER
POWER SUPPLY(I.B)
POWER SUPPLY(I.B)
CIRCUIT BOARD
SWITCH

[ LEGEND ]

NOTES:

1.At servicing for outdoor unit, always follow the wiring
diagram of outdoor unit.

2.Symbol [S] of TB5 is the shield wire connection.

3.Symbols used in wiring diagram above are,
:terminal block, :connector.

4.The setting of the SW2 dip switches differs in the capacity for
the detail, see the table <w1>.

5.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.

O

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

CN81CN42

ADDRESS

(RED)

(WHT)

REMOTE

3

1

CN27

CN25

0FF

65432 109876543211

10N2345

ZNR

X1

(RED)

CND

(YLW)

CNP

0FF

0N

SW2 SW3 SW4

DP

SWC

(RED)

ADDRESS

CN43

(RED)

ADDRESS

CN82

A.B

CONNECTION

SW14

2ND.
DIGIT

1ST.
DIGIT

3RD.
DIGIT

SW11SW12

TB2

L

CN60

(WHT)

LEV

CN6V

(GRN)

VANE

RED

BLU

BLU

BLU

BLU
BRN
ORN
YLW
RED
WHT

BRN
RED
ORN
YLW
GRN

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

1

Only

(WHT)

FAN

POWER

D.U.M

4

8

12 345678910

SW1

*See fig:W1

No.

240V

SW5

220V

CN52

(GRN)

REMOTE

INDICATION

SWITCH

RED

BLU

BLU

BLU

N

GRN/YLW

INDOOR UNIT

TO NEXT

(15A) (15A)

BREAKERFUSE

~/N 220-230-240V 50Hz
220V 60Hz

POWER SUPPLY

0N

0FF

654321

0N

0FF

654321

0N

0FF

654321

123 456

0FF

0N

LED1

LED2

PE

123 456

0FF

0N

123 456

0FF

0N

123 456

0FF

0N

0N

0FF

654321

10987

10987

10987

10987

3

1

1

3

431 2 21 3 4 5 6 7 8

1

2

2
1

5

4

3

2

1

1

2

3

4

5

6

6
5
4
3
2
1

1

2

1

2

1

2

1

2

3

21

21 3 654

1

2

3

4

1

2

3

4

5

6

7

8

<W1>

P20VBM

SW2

MODELS

P25VBM

P32VBM

P40VBM

SW3

X1

T

000

1

2

TB15

CN3A
(BLU)

REMOCON

21

TO MA-REMOTE CONTROLLER
DC8.7-13V

ORN

ORN

0FF

10N2345

SW4

PMFY-P20VBM-A
PMFY-P20VBM-A1
PMFY-P25VBM-A
PMFY-P25VBM-A1
PMFY-P32VBM-A
PMFY-P32VBM-A1
PMFY-P40VBM-A
PMFY-P40VBM-A1

WIRING DIAGRAM

11

REFRIGERANT SYSTEM DIAGRAM7

Strainer (#50mesh)

Strainer (#100mesh)

Strainer (#100mesh)

Heat exchanger

Room temperature thermistor TH21

Gas pipe
temperature
thermistor TH23

Liquid pipe
temperature
thermistor TH22

Linear expansion valve

w1 w2

Gas pipe

Liquid pipe

Flare connection

Gas pipe

Liquid pipe

[12.7(1/2")
[6.35(1/4")

Item

Service Ref.

Capillary tube w1
Capillary tube w2

O.D.[4.6 o I.D.[3.4 o R200

O.D.[3.6 o I.D.[2.4 o R200

O.D.[3.6 o I.D.[2.4 o R80

PMFY-P20, P25, P32, P40VBM-A
PMFY-P20, P25, P32, P40VBM-A1

PMFY-P20, P25VBM-A
PMFY-P20, P25VBM-A1

PMFY-P32, P25VBM-A
PMFY-P40, P25VBM-A1

PMFY-P20VBM-A PMFY-P25VBM-A PMFY-P32VBM-A PMFY-P40VBM-A
PMFY-P20VBM-A1 PMFY-P25VBM-A1 PMFY-P32VBM-A1 PMFY-P40VBM-A1

12

8

Parts name Check points

Disconnect the connector then measure the resistance using a tester.
(Surrounding temperature 10:~30:)

Disconnect the connector then measure the resistance valve using a tester.
Refer to the next page for a detail.

Measure the resistance between the terminals using a tester.
(Surrounding temperature 20:~30:)

Measure the resistance between the terminals using a tester.
(Surrounding temperature 20:)

Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(Surrounding temperature 0:~60:)

Vane motor

Linear expansion
valve

Drain-up
mechanism

Drain sensor

(Refer to the next page for a detail.)

(Refer to the next page for a detail.)

(Refer to the next
page for a detail.)

Room temperature
thermistor (TH21)

Liquid pipe temperature
thermistor (TH22)

Gas pipe temperature
thermistor (TH23)

1
2

Blue

Blue

1
2
3

Normal

4.3k"~9.6k"

Abnormal

Open or short

Abnormal

Open or short

Normal

0.6k"~6.0k"

Abnormal

Open or short

Normal



150k" i10%

(1)-(5)

White-Red

(2)-(6)

Yellow-Blown

(3)-(5)

Orange-Red

(4)-(6)

Blue-Brown

NormalConnector Abnormal

380" i7% Open or short

Normal Abnormal

400"~480" Open or short

Orange

Red

White

Blue

Brown

Yellow

3

6

1

5

4

2

3

6

1

5

4

2

MV

M

Orange

Red

Brown

Brown — Yellow
Brown — Red
Brown — Orange
Brown — Green

Green

Yellow

31

5

4

2

TROUBLE SHOOTING

8-1. How to check the parts PMFY-P20/25/32/40VBM-A

PMFY-P20/25/32/40VBM-A1

13

<Thermistor Characteristic graph>

-20 0 20 40 60 80

< Thermistor for drain sensor >

Temperature (:)

0

1

2

3

4

5

6

7

8

9

10

Resistance (K")

Thermistor for
lower temperature

Room temperature thermistor(TH21)
Liquid pipe temperature thermistor(TH22)
Gas pipe temperature thermistor(TH23)

Thermistor R0=15k' ± 3%
Fixed number of B=3480k' ± 2%

< Thermistor for lower temperature >

50

40

30

Rt=15exp { 3480( ) }

1

273+t

1

273

0: : 15k'
10: : 9.6k'
20: : 6.3k'
25: : 5.2k'
30: : 4.3k'
40: : 3.0k'

Thermistor R0=6.0k' ± 3%
Fixed number of B=3390k' ± 2%

Rt=6exp { 3390( ) }

1

273+t

1

273

0: : 6 k'
10: : 3.9k'
20: : 2.6k'
25: : 2.2k'
30: : 1.8k'
40: : 1.3k'

Resistance (K")

20

10

0

-20 -10 0 10 20 30 40 50
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.
<Connection between the indoor controller board and the linear expansion valve>

Controller board

Relay connector

Linear expansion valve

Blue

4

M

5

1

Red

White

Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color of

the lead wire.

Brown

6

Yellow

2
3

Orange

[4
[3

[2
[1

5

1
3

4
6

Brown

Red

Blue

Orange

Yellow

White

Connector (CN60)

14

DC12V

62
5

4
3

2
1

Drive circuit

[4
[3

[2
[1

<Output pulse signal and the valve operation>

D

A

E

B

C

Open

Extra tightning (80~100pulse)

Pulse number

2000 pulse
Opening a valve
all the way

Close

Valve position (capacity)

Thermistor
(Liquid pipe)

Linear
expansion
valve

150

'

10%.

Output

(Phase)

{1
{2
{3
{4

Linear expansion valve operation

➁

1
ON
ON

OFF
OFF

2

OFF

ON
ON

OFF

Output

3
OFF
OFF

ON
ON

4

ON
OFF
OFF

ON

Closing a valve : 1 → 2 → 3 → 4 → 1
Opening a valve : 4 → 3 → 2 → 1 → 4

The output pulse shifts in above order.
❈ 1. When linear expansion valve operation stops, all output phase

become OFF.

2. At phase interruption or when phase does not shift in order,
motor does not rotate smoothly and motor will locks and vibrates.

❈ When the switch is turned on, 2200 pulse closing valve signal

will be send till it goes to

A point in order to define the valve posi-

tion.

When the valve move smoothly, there is no noise or vibration
occurring from the linear expansion valve : however, when the
pulse number moves from E to A or when the valve is locked,
more noise can be heard than normal situation.

❈ Noise can be detected by placing the ear against the screw

driver handle while putting the screw driver to the linear expan­sion valve.

Trouble shooting

➂

Symptom

Operation circuit fail-

ure of the micro
processor.

Linear expansion

valve mechanism is
locked.

Short or breakage of

the motor coil of the
linear expansion
valve.

Valve doesn't close

completely (thermis­tor leaking).

Wrong connection of

the connector or
contact failure.

Check points

Disconnect the connector on the controller board, then con­nect LED for checking.

Pulse signal will be sent out for 10 seconds as soon as the
main switch is turn on. If there is LED with lights on or lights
off, it means the operation circuit is abnormal.

Motor will idle and make ticking noise when motor is operated
while the linear expansion valve is locked. This ticking sound
is the sign of the abnormality.

Measure the resistance between the each coil (red-white,
red-orange, brown-yellow, brown-blue) using a tester. It is
normal if the resistance is in the range of

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

controller, it means the valve is not closed all the way. It is
not necessary to exchange the linear expansion valve, if the
leakage is small and not making any trouble.

Check the color of lead wire and missing terminal of the con­nector.

LED1k"

pipe temperature> of the indoor unit by the
outdoor multi controller board operation
monitor. During fan operation, linear
expansion valve is closed completely and if
there are some leaking, detecting tempera­ture of the thermistor will go lower. If the
detected temperature is much lower than
the temperature indicated in the remote

6
5
4
3
2
1

Countermeasures

Exchange the indoor con­troller board at drive circuit
failure.

Exchange the linear
expansion vale.

Exchange the linear
expansion valve.

If large amount of thermis­tor is leaked, exchange the
linear expansion valve.

Disconnect the connector
at the controller board,
then check the continuity.

15

8-2. TROUBLE SHOOTING

Notes

· High voltage is applied to the connecter (FAN) for the fan motor. Give attention to the service.

· Do not pull out the connector (Fan) for the motor with the power supply on.
(It causes trouble of the control

p.c.board)

Self check
Conditions : The indoor fan cannot turn around.

N0

Wiring contact check
Contact of fan motor connector (FAN)
Contact of power supply cable.

Fan motor check
Measure the resistance between the fan motor connecter 1(+) and 3( ).
(With the connecter is pulled out from the

p.c.board)

Power supply check
Check the voltage in the indoor control

p.c.board

Approx. 310~340V between the connecter (FAN) 1(+) and 3( ).
Approx. 1~3V between the connecter (FAN) 5(+) and 3( ).
The voltage between the 5 and 3 is a value during the fan motor operation.
In the case that the fan motor off, the voltage is 0V.

Fan motor position sensor signal check
Turn around the fan motor more than one revolution slowly, and check
the voltage between the connecter (FAN) 6(+) and 3( ).

Check method of indoor fan motor (fan motor / control p.c.board)

Wiring recovery

Trouble of the fan motor Replacement of the motor

Is the resistance 1M" or more?

Trouble of the indoor

p.c.board

Replacement of the indoor control

p.c.board

Trouble of the fan motor
Replacement of the motor

Dose the voltage repeat DC0V and DC15V?

Replacement of the indoor control

p.c.board

Is the voltage normal?

Was contact caused good?

Yes

1

2

N0

Yes

N0

Yes

N0

Yes

16

8-3. FUNCTION OF DIP SWITCH

Switch Function Remarks

<At delivery>

ON

OFF

1 2 3 4 5 6 7 8 9

10

Address board

Operation by switch

ON OFF

(

w1

) Fan operation at Heating

mode.
(

w2

) Heater thermo ON is

operating.
(

w3

) SW 1-7=OFF, SW 1-8=ON
→ Setting air flow.
SW 1-7=OFF, SW 1-8=ON
→ Indoor fan stop.

Pole

Bult-in remote controller
Provided
2,500hr
Effective
Thermostat ON signal indication
Always operated while the heat in ON w1
Low w3
Setting air flow
Effective
Effective

Filter crogging detection
Filter cleaning sign
Fresh air intake
Remote indication switching
Humidifier control
Air flow at
Heat thermostat OFF
Auto restart function
Power source ON/OFF

Indoor unit
Not provided
100hr
Not effective
Fan output indication
Operated depends on the condition w2
Extra low w3
Depends on SW1-7
Not effective
Not effective

Cooling only
Available
Available
Available
Second setting
Horizontal angle
Effective
Not effective
9deg. (5deg.) w6
15deg.

Heat pump / Cool only
Louver
Vane
Vane swing function
Vane horizontal angle
Vane cooling limit angle setting w4

Heating 4deg. up
Target superheat setting w5
Target sub cool setting w5

Heat pump
Not available
Not available
Not available
First setting
Down B, C
Not effective
Effective
6deg. (2deg.) w6
10deg.

1
2
3
4
5
6
7
8
9

10

1
2
3
4
5
6
7
8
9

10

SW1

Mode

Selection

SW2

Capacity

code

setting

1~6

1~5

SW3

Function

Selection

SW4

Unit

Selection

Indoor linear expansion
valve opening change

Thermistor <intake temperature
detection> position

<At delivery>

ON

OFF

1 2 3 4 5 6 7 8 9

10

Indoor controller board

( w4 ) At cooling mode, each
angle can be used only
1 hour.

(

w6

)

The numerical valve in
the parentheses shows
the case which the R22
outdoor unit is connected.

Indoor controller board

<At delivery>

Set while the unit is off.

Set while the unit is off.

Set while the unit is off.

Set for each capacity.

Indoor controller board

(

w5

) SW 3-9 setting

PMFY-P20, P25VBM

(1)=ON

PMFY-P32, P40VBM

(1)=OFF

SW 3-10 setting
PMFY-P20, P25VBM

(1)=ON

PMFY-P32, P40VBM

(1)=OFF

ON

OFF

1 2 3 4 5

ON

OFF

1 2 3 4 5

ON

OFF

MODELS

PMFY-P20VBM
PMFY-P20VBM

1

PMFY-P25VBM
PMFY-P25VBM

1

PMFY-P32VBM
PMFY-P32VBM

1

PMFY-P40VBM
PMFY-P40VBM

1

SW 2 MODELS SW 2

1 2 3 4 5 6

ON

OFF

1 2 3 4 5 6

ON

OFF

1 2 3 4 5 6

ON

OFF

1 2 3 4 5 6

ON

OFF

1 2 3 4 5

ON

OFF

1 2 3 4 5

PMFY-P20/25/32/40VBM PMFY-P20/25/32/40VBM1

PMFY-P20/25/32/40VBM PMFY-P20/25/32/40VBM1

17

0

5

9

4

8

3

7

2

6

1

0

5

9

4

8

3

7

2

6

1

0

5

9

4

8

3

7

2

6

1

0

5

9

4

8

3

7

2

6

1

0

8

F

7

E

6

D

5

C

4

B

3

A

2

9

1

0

8

F

7

E

6

D

5

C

4

B

3

A

2

9

1

220V 240V

Rotary switchRotary switch

SW14

Connection

No.

setting

SW5

Voltage

Selection

SW11
1st digit
address

setting

SW12

2nd digit

address

setting

2

Address setting should be done when M-NET
remote controller is being used.

This is the switch to be used when the indoor
unit is operated with R2 series outdoor unit
as a set.

If the unit is used at the 230V or 240V area,
set the voltage to 240V.
If the unit is used at the 220V, set the voltage
to 220V.

Address can be set while the
unit is stopped.

Address board

<At delivery>

Address board

<At delivery>

Address board

SW1210SW11

1

SW12 SW11

SW14

SW14

<At delivery>

220V 240V

Switch Pole RemarksOperation by switch

18

9

DISASSEMBLY PROCEDURE

PMFY-P32VBM-A1

OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS

Be careful on removing heavy parts.

1. Removing the intake grille

Opening the air intake grille

(1) Press the of the air intake grille.(See figure 1)
(2) Put your figure on the both end of nut of the air intake grille

and put it down after the grille clicked.

Removing the air intake grille

(1) Press the of air intake grille, and pull down the both

end of nut with your fingers after the grille clicked.
(See figure 1)

(2) Pull out the handle of air intake grille strong toward you.

(See figure 2)

(3) Draw the string of air intake grille to prevent the grille from

dropping.(see figure 3)

PUSH

PUSH

Photo 1

Air filter

Figure 1

Figure 2

Figure 3

19

OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS

2. Removing the electrical parts box

(1) Remove the panel.
(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,
condenser/evaporator temperature thermistor,
and drain sensor on the electrical controller board.

(5) Disconnect the lead wire and earth wire from terminal

block.

(6)Remove the electrical parts box.

3. Removing the nozzle
Note when the nozzle is removed

·The insulation material (white) which prevents water
drop is mounted to the side of vane motor, remove the
insulation material before removing nozzle.
(See figure 4)

·After completing the service, re-mount the insulation
material as before as shown in right figure.

·After service, mount the double layer insulation
without fail.
The hard material side should be faced to the nozzle.
(See figure 4)

(1) Remove the panel.
(2) Remove the room temperature thermistor.
(3) Unhook the claw 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.
(6) Remove the electrical parts cover.
(7) Disconnect the connector of vane motor.
(8) Remove the insulation material (white) on the right side of

nozzle.
(9)Remove the nozzle. (6 screws)

Photo 2

Drain pan

Photo 3

Photo 4

Nozzle

Room temperature thermistor

Figure 4

Hard side of insulation

Nozzle

Vane motor

Claw in middle
of nozzle

Insulation material

Nozzle

Heat exchanger

Soft side of insulation

Electrical parts

Electrical parts
cover

Address board

cover

Vane motor

4. Removing the vane motor

(1) Remove the nozzle. Refer to above-mentioned (3)

Removing the nozzle.
(2) Remove the vane motor.

20

Photo 5

Vane motor

OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS

5. Removing the drain pump

(1) Remove the panel.
(2) Unhook the claw in the middle of nozzle and remove the

drain pan.
(3) Remove the address board cover.
(4) Remove the electrical parts cover.
(5) Disconnect the connector of drain pump.
(6) Remove the drain hose.
(7) Remove the drain pump.(2 screws)

6. Removing the fan motor and line flow fan

(1) Remove the panel.
(2) Unhook the claw in the middle of nozzle and remove the

drain pan.
(3) Unscrew 2 screws at the nozzle side of the heat exchanger.
(4) Remove the address board cover.
(5) Remove the electrical parts cover.
(6) Disconnect the connector of vane motor,fan motor and

drain pump.
(7) Remove the nozzle side of the heat exchanger.(2 screws)
(8) Remove the nozzle.
(9) Remove the drain pump.

(10) Unscrew 2 screws in the motor support.
(11) Remove the fan motor and line flow fan (The fan motor

and line flow fan can be removed without removing the

heat exchanger.)

Photo 6

Photo 7

Drain sensor

Line flow fan

Drain pump

Fan motor

Fan motor

7. Removing the thermistor<Intake temperature detector>

(1) Remove the panel.
(2) Remove the address board cover.
(3) Remove the electrical parts cover.
(4) Remove the thermistor <intake temperature detector>
(5) Disconnect the lead wire from the cord clamp (5 points)
(6) Disconnect the connector (CN20) on the indoor controller

board.

8. Removing the thermistor<Liquid pipe temperature detector>
<Gas pipe temperature detector>

(1) Remove the panel.
(2) Remove the address board cover.
(3) Remove the electrical parts cover.
(4) Remove the drain pan.
(5) Remove the thermistor <Gas pipe temperature detector>

/<Liquid pipe temperature detector>.
(6) Disconnect the lead wire from the cord clamp
(7) Disconnect the connector (CN21)/(CN29) on the indoor

controller board.

21

PARTS LIST10

1
2
3
4
5
6
7
8

9
10
11
12
13

T7W E11 003

R01 E00 055

—

R01 E00 099
RO1 E01 054
RO1 E01 500

R01 E02 500
TW7 E01 691

R01 E00 054

R01 E00 648

R01 E00 044

R01 E00 096

—

1
2
2
2
2
1
1
1
2
1
2
1
1

(DT88D360H03)

AIR OUTLET GRILLE
LATCH
HANGER
PANEL HOOK
GRILLE CATCH
L.L.FILTER
L.L.FILTER
INTAKE GRILLE
GRILLE CATCH
RECEIVER COVER
MAGNET
SCREW CAP
REMOTE CONTROLLER

No. Part No. Part Name Specification

Q'ty/set

Price

Unit

Amount

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

PMFY-P20/P25
P32/P40

VBM-A
VBM-A

1

PAR-20MAA R.B

PAR-20MAA

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN
FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY
DEFROST

FILTER

CHECKTEST

TEMP.

TIMER SET

PANEL PARTS
PMFY-P20VBM-A
PMFY-P20VBM-A1
PMFY-P25VBM-A
PMFY-P25VBM-A1
PMFY-P32VBM-A
PMFY-P32VBM-A1
PMFY-P40VBM-A
PMFY-P40VBM-A1

11

12

1

11

2

3

4

5

2

3

4

10

5

6

9

7

8

13

22

FUNCTIONAL PARTS

1
2
3
4
5
6
7

8

9

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

1
1
1
1
1
1
1

1
1

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

1
1
1
1
1
1

1

1

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

1
1
1
1
1
1
1
1

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

PMFY-P · VBM-A

PMFY-P · VBM-A

1

1
1
1
1
1
1
1
1

1

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

TH21

TH22

LEV

TH23

MV

DS
DP

MF

(DT00A478G64)
(RG02L277H02)

(RG00L311G07)

CABINET
ADDRESS BOARD COVER
BEARING MOUNT
SLEEVE BEARING
LINE FLOW FAN
STABILIZER ASSY
VANE SLEEVE
HEAT EXCHANGER
HEAT EXCHANGER
DRAIN PAN
DRAIN PAN
THERMISTOR
GUIDE VANE
THERMISTOR
LINEAR EXPANSION VALVE
THERMISTOR
VANE
VANE MOTOR
CASING
SENSOR HOLDER
DRAIN SENSOR
DRAIN PUMP
MOTOR SUPPORT
FAN MOTOR
MOTOR MOUNT
DRAIN PIPE
CONTROL BOX COVER
SCREW ASSY

ROOM

LIQUID

GAS

No.

Part No. Part Name Specification

Q'ty/set Price

Unit

Amount

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

20/25 32/40 20/25 32/40
—
—

R01 22A 102
R01 005 103
R01 E02 114
R01 E00 079
R01 E00 092
T7W E39 480
T7W E40 480
R01 E04 529
R01 E10 529
R01 E00 202
R01 E00 038
R01 E01 202
R01 E00 401
R01 E03 202
R01 E01 002
R01 E01 223
R01 E00 110
R01 31K 241
R01 E01 266
T7W E02 355
R01 E00 130
R01 E03 220
R01 E01 105
R01 E00 527

—

R01 E01 673

PMFY-P20VBM-A
PMFY-P20VBM-A1
PMFY-P25VBM-A
PMFY-P25VBM-A1
PMFY-P32VBM-A
PMFY-P32VBM-A1
PMFY-P40VBM-A
PMFY-P40VBM-A1

25

24

1

2

23

19

3
4

22
21

18

20

5

6

7

8

9

10

Part number that is circled is not shown in the figure.

17
16

15
14

13

12

11

23

ELECTRICAL PARTS

1
2
3
4
5
6
7

8

1
1
1
1
1
1
1

1

(RG02B337G10)

TB2
TB5

TB15

A.B

FUSE

I.B
I.B

CONTROL BOX
TERMINAL BLOCK
TERMINAL BLOCK
TERMINAL BLOCK
ADDRESS BOARD
CABLE ASSY
FUSE
INDOOR CONTROLLER BOARD
INDOOR CONTROLLER BOARD

3P (L,N,;)
3P (M1,M2,S)
2P(1,2)

250V 6.3A
with POWER BOARD
with POWER BOARD

No. Part No. Part Name

Specification

Q'ty/set

Price

Unit

Amount

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

PMFY-P20/P25

P32/P40

VBM-A1
1
1
1
1
1
1
1
1

VBM-A

—
T7W A14 716
T7W E00 716
T7W 515 716
T7W B01 294
R01 E00 304
T7W 520 239
T7W E11 310
T7W E16 310

CNP

FAN

CN60

CN6V

RG79L094H01

PMFY-P20VBM-A
PMFY-P20VBM-A1
PMFY-P25VBM-A
PMFY-P25VBM-A1
PMFY-P32VBM-A
PMFY-P32VBM-A1
PMFY-P40VBM-A
PMFY-P40VBM-A1

8

1

7

2

3

4

cCopyright 2001 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Jun. 2001. No. OC248 REVISED EDITION-A PDF 1070
Reprinted in Apr. 2001. No. OC248 10
Reprinted in Mar. 2001. No. OC248 25
Distributed in Feb. 2001. No. OC248 PDF 685
Made in Japan

HEAD OFFICE : MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN

5

6

New publication, effective Jun. 2001
Specifications subject to change without notice