Mitsubishi OC307C Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

September 2008

No. OC307

REVISED EDITION-C

Series PMFY

Indoor unit
[Model names] [Service Ref.]

PMFY-P20VBM-E PMFY-P20VBM-E

Ceiling Cassettes

PMFY-P20VBM-E1

PMFY-P25VBM-E PMFY-P25VBM-E

PMFY-P20VBM-E#2

PMFY-P25VBM-E1

PMFY-P32VBM-E

PMFY-P40VBM-E PMFY-P40VBM-E

PMFY-P25VBM-E#2
PMFY-P32VBM-E
PMFY-P32VBM-E1

PMFY-P32VBM-E#2

PMFY-P40VBM-E1

PMFY-P40VBM-E#2

R410A

R407C

Revision:

•

PMFY-P20/25/32/40VBM-E#2
are added in REVISED
EDITION-C.

• Some descriptions have
been modified.

• Please void OC307
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.

• For servicing RoHS compli-

ant products, refer to the
RoHS Parts List.

R22

INDOOR UNIT

CONTENTS

1. TECHNICAL CHANGES

2. SAFETY PRECAUTION

3. PART NAMES AND FUNCTIONS

4. SPECIFICATIONS

5. OUTLINES AND DIMENSIONS

6. WIRING DIAGRAM

7.

REFRIGERANT SYSTEM DIAGRAM

8. TROUBLE SHOOTING

9. DISASSEMBLY PROCEDURE

10. PARTS LIST

11. RoHS PARTS LIST

......................................

.....................

......................

...............................

...........................

.....................

...........................

......

........

.....

.........

2

2
6
8

12

13
16
17
26
29

32

1

PMFY-P20VBM-E1 → PMFY-P20VBM-E#2
PMFY-P25VBM-E
PMFY-P32VBM-E1 → PMFY-P32VBM-E#2
PMFY-P40VBM-E1 → PMFY-P40VBM-E#2

1. CONTROLLER BOARD (I.B) has been 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 → PMFY-P20VBM-E1
PMFY-P25VBM-E → PMFY-P25VBM-E1
PMFY-P32VBM-E → PMFY-P32VBM-E1
PMFY-P40VBM-E → PMFY-P40VBM-E1

1. FAN MOTOR (MF) has been changed.

2. CONTROLLER BOARD (I.B) has been changed.

TECHNICAL CHANGES

1 → PMFY-P25VBM-E#2

2

SAFETY PRECAUTION

CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R407C

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 flared pipe.

· Avoid using thin pipes.

Make sure that the inside and outside of refrige­rant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.

Contamination inside refrigerant piping can cause deterio­ration of refrigerant oil etc.

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.)

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

If large amount of mineral oil enters, that can cause
deterioration of refrigerant oil etc.

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.

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

Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.

2

[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

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

·Leave the syphon pipe cylinder standing and recharge it.
(By liquid refrigerant)

Unit

Gravimeter

(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] Service tools

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

33

Cautions for units utilizing refrigerant R410A

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 flared pipe.

· Avoid using thin pipes.

Make sure that the inside and outside of refrige­rant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.

Contamination inside refrigerant piping can cause deterio­ration of refrigerant oil etc.

Store the piping to be used during installation
indoors and keep both ends of the piping sealed
until just before brazing. (Leave elbow joints, etc.
in their packaging.)

If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com­pressor.

Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.

If large amount of mineral oil enters, that can cause deterio­ration of refrigerant oil etc.

Do not use refrigerant other than R410A.

If other refrigerant (R22 etc.) is used, chlorine in refrige­rant can cause deterioration of refrigerant oil etc.

Use a vacuum pump with a reverse flow check
valve.

Vacuum pump oil may flow back into refrigerant cycle and
that can cause deterioration of refrigerant oil etc.

Use the following tools specifically designed for
use with R410A refrigerant.

The following tools are necessary to use R410A refrigerant.

Tools for R410A
Gauge manifold
Charge hose

Gas leak detector

Torque wrench

Flare tool
Size adjustment gauge
Vacuum pump adaptor

Electronic refrigerant
charging scale

Keep the tools with care.

If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com­pressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigera­nt will change and the efficiency will be lowered.

Charge refrigerant from liquid phase of gas
cylinder.

If the refrigerant is charged from gas phase, composition
change may occur in refrigerant and the efficiency will be
lowered.

Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.

4

[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.

[2] Additional refrigerant charge

When charging directly from cylinder

· Check that cylinder for R410A on the market is syphon type.

· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

Unit

Gravimeter

[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

·Use high-tension side pressure of 5.3MPa·G or over.

2 Charge hose ·Only for R410A

·Use pressure performance of 5.09MPa·G or over.

3 Electronic scale

4 Gas leak detector ·Use the detector for R134a, R407C or R410A.

5 Adaptor for reverse flow check ·Attach on vacuum pump.

6 Refrigerant charge base

7 Refrigerant cylinder ·Only for R410A ·Top of cylinder (Pink)

·Cylinder with syphon

8 Refrigerant recovery equipment

specifications

. (UNF1/2)

5

3

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

MENU

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

Temperature setting buttons

Down

Up

Timer Menu button
(Monitor/Set button)

Mode button (Return button)

Set Time buttons

Back

Ahead

Timer On/Off button
(Set Day button)

Opening the
lid

ON/OFF button

Fan Speed button

Filter button
(<Enter> button)

Test Run button

Check button (Clear button)

Airflow Up/Down button

Louver button
( Operation button)

To return operation
number

Ventilation button
( Operation button)

To go to next operation
number

Built-in temperature sensor

PART NAMES AND FUNCTIONS

Indoor 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 horizontal
by moving the Guide vane to the left or right.

Filters

Remove dust and pollutants

Returns air from room.

Air intake

from return air.

Wired remote controller

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

6

Wired remote controller

Display Section

For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.

Identifies the current operation

Shows the operating mode, etc.
*Multilanguage display is available.

“Centrally Controlled” indicator

Indicates that operation from the
remote controller has been prohib­ited by a master controller.

“Timer is Off” indicator

Indicates that the timer is off.

Temperature Setting

Shows the target temperature.

Day-of-Week

Shows the current day of the week.

Time/Timer Display

Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, the time to be
switched off is shown.

TIME SUN MON TUE WED THU FRI SAT
TIMER

AFTER

ERROR CODE

°F°C

Hr

AFTER

°F°C

ONLY1Hr.

Up/Down Air Direction indica­tor

The indicator shows the direction
of the outcoming airflow.

“One Hour Only” indicator

Displayed if the airflow is set to
low or downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off in one hour,
when the airflow direction also
changes.

Room Temperature display

Shows the room temperature. The room
temperature display range is 8-39.
The display blinks if the temperature
is less than

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.

ON

OFF

FUNCTION

FILTER

WEEKLY

AUTO OFF

8 or 39

SIMPLE

or more.

“Sensor” indication

Displayed when the remote controller
sensor is used.

“Locked” indicator

Indicates that remote controller but­tons have been locked.

“Clean The Filter” indicator

To be displayed on when it is time to
clean the filter.

Timer indicators

The indicator comes on if the corre­sponding timer is set.

Fan Speed indicator

Shows the selected fan speed.

Ventilation indicator

Appears when the unit is running in
Ventilation mode.

Note:

●

“PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.
“NOT AVAILABLE” message

●

This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as
far as any of the indoor units is equipped with the function.

77

4

SPECIFICATIONS

4-1. SPECIFICATION

Item

Power

Cooling capacity

Heating capacity

Cooling

Input

Heating

Cooling

Current

Electric characteristic

(munsell symbol)

Dimensions

Heating

Exterior

Height

Width

Depth

Heat exchanger

Fan × No

Air flow 3

External

static pressure

F a n

Fan motor

output

Insulator

Air filter

Pipe

dimensions

Gas
side

Liquid

side

Field drain pipe size

Noise level 3

Product weight

Hz

V

·

kW

kW

kW

kW

A

A

—

mm

mm

mm

—

—

G/min

Pa

kW

—

—

:mm(in.)

:mm(in.)

:mm

dB

kg

PMFY-P20VBM-E

PMFY-P20VBM-E

PMFY-P20VBM-E#2

PMFY-P25VBM-E

1

PMFY-P25VBM-E

PMFY-P25VBM-E#2

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

Unit : Galvanized sheets · Standard grilles : ABS resin acrylic coating

Munsell <0.98Y 8.99/0.63> (PMFY-P·VBM-E

8.7-8.0-7.2-6.5

PP honey comb fabric

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

35-33-30-27

230<30>

812<1,000>

395<470>

Cross fin

Line flow fan × 1

9.3-8.6-8.0-7.3

Polyethylene sheet

12.7(1/2")

6.35(1/4")

37-36-34-32

PMFY-P32VBM-E

PMFY-P32VBM-E

1

PMFY-P32VBM-E#2

(1)) / <6.4Y 8.9/0.4> (PMFY-P·VBM-E#2)

0

0.028

14<3.0>

Note 1. Rating conditions (JIS B 8615-1)
Cooling: Indoor: D.B. 27°C W.B. 19°C
outdoor: D.B. 35°C
Heating: Indoor: D.B. 20°C
outdoor: D.B. 7°C W.B. 6°C
Note 2. The number indicated in < > is for the grille.
W 3. Air flow and the noise level are indicated as High – Middium1 – Middium2 – Low.

3.6

4.0

0.044

0.044

0.21

0.21

PMFY-P40VBM-E

1

PMFY-P40VBM-E

PMFY-P40VBM-E#2

10.7-9.7-8.7-7.7

39-37-35-33

1

4.5

5.0

0.054

0.054

0.26

0.26

8

4-2. ELECTRIC PARTS SPECIFICATIONS

Service ref.

Parts name

Room temperature
thermistor

Liquid pipe thermistor

Gas pipe thermistor

Fuse
(Indoor controller board)

Fan motor

Vane motor

Drain-up mechanism

Symbol

TH21

TH22

TH23

FUSE

MF

MV

DP

PMFY-P20VBM-E

PMFY-P20VBM-E

PMFY-P20VBM-E#2

Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k

Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k

Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k

PMFY-P25VBM-E

1

PMFY-P25VBM-E1

PMFY-P25VBM-E#2

250V 6.3A

DC Brushless Motor

8-pole OUTPUT 28W

PN0H28-MB

MSFJC 20M23

220-240V 50/60Hz

PMFY-P32VBM-E

PMFY-P32VBM-E1

PMFY-P32VBM-E#2

12V/380

PJV-1046



PMFY-P40VBM-E

PMFY-P40VBM-E1

PMFY-P40VBM-E#2

Drain sensor

Linear expansion valve

Power supply
terminal block

Transmission
terminal block

MA-remote controller
terminal block

DS

LEV

TB2

TB5

TB15

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

DC12V Stepping motor drive, Port dimension :3.2

(0~2000pulse)

(L, N, ) 330V 30A

(M1, M2, S) 250V 20A

(1,2) 250V 10A

99

4-3. AIR CAPACITY TAKEN FROM OUTSIDE

n

PMFY-P·VBM-A 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).

250 288.5

108

90

W

122

100

W

Unit : mm

4-W2.8

Fresh air intake hole

(Knockout)

Service Ref.

Air flow

(Hi)

PMFY-P20VBM-E
PMFY-P20VBM-E
PMFY-P20VBM-E#2

1

8.7m3/min

PMFY-P25VBM-E
PMFY-P25VBM-E
PMFY-P25VBM-E#2

1

9.3m3/min

PMFY-P32VBM-E
PMFY-P32VBM-E
PMFY-P32VBM-E#2

1

9.3m3/min

PMFY-P40VBM-E
PMFY-P40VBM-E
PMFY-P40VBM-E#2

1

10.7m3/min

Operation in conjunction with duct fan (Booster fan)

Whenever the indoor unit is operating, the duct fun

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 of 1W or smaller.
MB: Electromagnetic switch power relay for duct fan.

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

Fresh air intake hole

(Knockout)

Air capacity from outside

Max 1.74m3/min

Max 1.86m3/min

Max 1.86m3/min

Max 2.14m3/min

Green

CN51
on
indoor unit
board

5

1

Connector (5P)

Indoor unit side

Multiple remote
controller adapter
PAC-SA88HA-E

Indoor controller board

Be sure to secure insulation
material by tape, etc.

Yellow

Orange

Red

Brown

~

MB

Installation at site

Be sure to secure insulatio
material by tape, etc.

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

How to read curves

Q

Duct characteristics
at site

A

B

A

EC

AD



0





Q

Qa

Curve in the
right graphs

Q

Multiple remote
controller adapter
PAC-SA88HA-E

Q…Designed amount of fresh air intake

A…Static pressure loss of fresh air

C

intake duct system with air flow
amount Q <Pa>

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 <Pa>

D…Static pressure loss increase amount

of fresh air intake duct system for air
flow amount Q <Pa>

E…Static pressure of indoor unit with air

flow amount Q <Pa>

Qa…Estimated amount of fresh air

intake without D <m3/min>

<m3/min>

<Pa>

50.0

0.0

-50.0

Static pressure (Pa)

-100.0

0.0 0.5 1.0

Characteristic diagram of fresh air taken capacity

Air flow (m

3

/min)

CN51

2 intakes

1 intake

1.5 2.0 2.5

10

4-4. NOISE CRITERION CURVES

PMFY-P20VBM-E
PMFY-P20VBM-E1
PMFY-P20VBM-E#2

90

NOTCH

High
Medium1
Medium2

Low

SPL(dB)

35
33
30
27

LINE

PMFY-P25VBM-E
PMFY-P32VBM-E
PMFY-P25VBM-E

1

PMFY-P32VBM-E1
PMFY-P25VBM-E#2
PMFY-P32VBM-E#2

90

NOTCH

High
Medium1
Medium2

Low

SPL(dB)

37
36
34
32

LINE

80

70

60

50

40

30

20

APPROXIMATE THRESHOLD OF HEARING
FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

PMFY-P40VBM-E
PMFY-P40VBM-E1
PMFY-P40VBM-E#2

90

NOTCH

High
Medium1
Medium2

Low

SPL(dB)

39
37
35
33

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

LINE

80

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF
HEARING FOR
CONTINUOUS

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)

NOISE

10

CEILING

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

UNIT

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)

80

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

11

1.5m

MICROPHONE

5

OUTLINES AND DIMENSIONS

PMFY-P20VBM-E PMFY-P20VBM-E1 PMFY-P20VBM-E#2
PMFY-P25VBM-E PMFY-P25VBM-E

1 PMFY-P25VBM-E#2

PMFY-P32VBM-E PMFY-P32VBM-E1 PMFY-P32VBM-E#2
PMFY-P40VBM-E PMFY-P40VBM-E1 PMFY-P40VBM-E#2

108

4-W2.8 Burring hole

100

O.D.W12.7(1/2")

O.D.W6.35(1/4")

O.D.W43

Gas pipe

Liquid pipe

Pipe cover

Refrigerant

piping

W

90

PVC pipe:VP-20[O.D.W26(1")]

Details of fresh air intake hole

Drainage piping

122

W

250 288.5

Knockout

Fresh air intake hole

Unit : mm

110

mounting plate

235 or more

230

110

Panel(grille):PMP-40BM(W)

74.5

26

20

75926

960 ceiling opening20 20

1000 outer side of grille

811 suspension bolt pitch74.5

20

2828

45

20

To p

247

69

53

17.517.5

43

46

Outer line of grille

Center of unit

Air outlet(lower)

45

20

340 Suspension bolt pitch

430 Ceiling opening

470 Outer side of grille

302

395

Terminal block for power supply

Electrical box

812

W50

230

198

Drainage pipe

PVC pipe:VP-20[I.D.W26]

141 759

254

Right side

Terminal block for transmission

Installation space required around indoor unit

Terminal block for

MA remote controller

200600200

drain pan

(56)

Front

1000 outer side of grille

(20)

(10)

(96)

Suspension bolt(M10 or W 3/8)

30

470 outer side of grille

60 40

Ceiling

panel

Panel(grille):PMP-40BM(W)

Lower view

Refrigerant pipe(gas)

O.D.W12.7

96

176

12

Refrigerant

pipe(liquid)

O.D.W6.35

Left side

Ceiling panel

Same line

Drain pan

6

WIRING DIAGRAM

PMFY-P20VBM-E
PMFY-P25VBM-E
PMFY-P32VBM-E
PMFY-P40VBM-E

A.B

SW5

220V

[ LEGEND ]

SYMBOL
I.B

A.B

240V

SW1

12345678910

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

SW1
SW5
SW11
SW12
SW14

SW11SW12

SWC

10ths
DIGIT1sDIGIT

INDOOR CONTROLLER BOARD
CONNECTOR

SWITCH

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

NAME

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 1s DIGIT
ADDRESS SETTING 10ths DIGIT
BRANCH NO.

(RED)

ADDRESS

CN43

SW14

000

BRANCH

No.

TO NEXT
INDOOR UNIT

4
3
2
1

(RED)

ADDRESS

CN82

PULL BOX

TB2

L

RED

BLU

DP

*See fig:1

8
7
6
5
4
3
2
1

SYMBOL
MF
MV
DP
DS
TB2
TB5
TB15
TH21

TH22

TH23

LEV

LED on indoor board for service

Mark

LED1

LED2

BREAKERFUSE

(15A) (15A)

N

PE

GRN/YLW

RED

BLU

BLU

BLU

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

THERMISTOR

LINEAR EXPANSION VALVE

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

MF

5

I.B

LED1

FAN

213 654

(WHT)

FUSE

3
1

ZNR

CND

(RED)

POWER

1
3

CNP
(YLW)
D.U. M

(WHT)
REMOTE
SWITCH

CN32

3

4

NAME

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)

X1

X1

SW2 SW3 SW4

0N

0FF

1

8

65432109876543211

(RED)

ADDRESS

Meaning

Main power supply

Power supply for
MA-Remote controller

Main power supply(Indoor unit:220-240V)
power on Lamp is lit.

Power supply for MA-Remote controller
on Lamp is lit.

TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V

TB5

(SHIELD)

M1 M2

BLU

BLU

CN2M
(BLU)

M-NET

T

CN3A

21

(BLU)

REMOCON

LED2

CN41

(WHT)

HA

CN51

(WHT)

CENTRALLY

CONTROL

CN52

(GRN)

REMOTE

INDICATION

10N2345

(RED)

ADDRESS

CN81CN42

4

1
5

1
5

1

4312 21 345678

MODELS

P20VBM

P25VBM

P32VBM

P40VBM

Function

TO MA-REMOTE CONTROLLER
DC8.7-13V

2

1

TB15

ORN

ORN

21

3

CN31

(WHT)

2

DRAIN

1

CN29

2

(BLK)

1

GAS

CN21

2

(WHT)

1

LIQUID

CN20

2

(RED)

1

0FF

0FF

0FF

0FF

0FF

INTAKE

CN60
(WHT)

LEV

CN6V
(GRN)
VAN E

SW2

0N

0N

0N

0N

123456

6
5
4
3
2
1

6
5
4
3
2
1

2
1

CN25

2
1

CN27

654321

654321

654321

BLU
BRN
ORN
YLW
RED
WHT

BRN
RED
ORN
YLW
GRN

SW3

0N

0FF

123456

0N

0FF

123456

0N

0FF

123456

0N

0FF

654321

<1>

10987

10987

10987

10987

NOTES:

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

2. In case of using MA-Remote controller, please connect to TB15. (Remote controller wire is non-polar.)

3. In case of using M-NET, please connect to TB5.(Transmission wire is non-polar.)

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

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

6. The setting of the SW2 dip switches differs in the capacity. For the detail, refer to the table above.

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.

DS

TH23

TH22

TH21

6

LEV

1
2

MV

3
4
5

13

PMFY-P20VBM-E1 PMFY-P25VBM-E1 PMFY-P32VBM-E1 PMFY-P40VBM-E1

FUSE

TO NEXT
INDOOR UNIT

PULL BOX

TB2

LN

RED

BLU

RED

BLU

BLU

M

1~

BLU

DP

*See fig :+1

A.B

SW5

240V220V

SW1

12345678910

SW11

SW12

0

0

1

9

8

7

6

10ths

DIGIT

[LEGEND]

SYMBOL NAME

I.B INDOOR CONTROLLER BOARD

CN25
CN27
CN32
CN51
CN52
SW2
SW3
SW4
ZNR VARISTOR
FUSE FUSE (6.3A / 250V)
X1 AUX.RELAY DRAIN PUMP
T TRANSFORMER

LED1

LED2
MF
MV
DP

DS

1

9

2

8

3

7

4

4

6

5

5

1s

DIGIT

CONNECTOR

SWITCH CAPACITY CODE

POWER SUPPLY(I.B)

POWER SUPPLY(I.B)
FAN MOTOR
VANE MOTOR
DRAIN WATER LIFTING-UP MACH.

DRAIN SENSOR

(RED)

ADDRESS

CN43

SWC

2

3




HUMIDIFIER
DAMPER
REMOTE SWITCH
CENTRALLY CONTROL
REMOTE INDICATION

MODE SELECTION
MODEL SELECTOR

BREAKER

(15A)

(15A)

GRN / YLW

I.B

LED1

FAN

(WHT)

63

FUSE

3

1

CND

(RED)

POWER

1

3

CNP
(YLW)
D.U.M

ON

OFF

(WHT)

REMOTE

SWITCH

CN32

4

8

1

(RED)

ADDRESS

SW14

0

1

E

CN82

2

D

3

F

4

C

5

B

6

A

7

9

8

BRANCH

No.

1

SYMBOL NAME

TB2

TERMINAL

TB5

BLOCK

TB15

THERMISTOR

TH21

TH22

TH23

LEV LINEAR EXPANSION VALVE

A.B CIRCUIT BOARD

SW1

SWITCH
SW5
SW11
SW12
SW14 BRANCH No.

POWER SUPPLY
~ / N
220-240V 50Hz
220V 60Hz

MF

MS

3~

U

X1

SW4

12345678910

12345

ADDRESS

4

POWER SUPPLY
TRANSMISSION
MA-REMOTE CONTROLLER

ROOM TEMP. DETECTION
(0/15k,25/5.4k
PIPE TEMP. DETECTION / LIQUID
(0/15k
PIPE TEMP. DETECTION / GAS
(0/15k

MODE SELECTION
VOLTAGE SELECTION
ADDRESS SETTING 1s DIGIT
ADDRESS SETTING 10ths DIGIT

TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V

TB5

M1 M2

BLU

CN2M

(BLU)

M-NET

1

T

SW3

(RED)

CN42

8

,

25/5.4k

,

25/5.4k

S

(SHIELD)

BLU

CN3A
(BLU)

REMOCON

12

LED2

CENTRALLY

CONTROL

INDICATION

SW2

123456

ADDRESS

)

)

)

TO MA-

REMOTE CONTROLLER

DC8.7-13V

1 2

TB15

ORN

ORN

3

13

CN31

CN51

(WHT)

CN52

(GRN)

REMOTE

ON
OFF

(RED)

CN81

(WHT)

DRAIN

1

CN29

2

(BLK)

1

GAS

CN21

2

(WHT)

1

LIQUID

CN20

2

(RED)

1

INTAKE

6

CN60

(WHT)

LEV

5

1

1
5

1

CN6V

(GRN)

VAN E

6

1

2

CN25

1

2

CN27

1

843 11 1

BRN

RED

BLU

ORN

YLW

WHT

BRN

RED

ORN

YLW

GRN

t

t

t

t

MODELS

P20VBM

P25VBM

P32VBM

P40VBM

DS

TH23

TH22

TH21

M

LEV

1

M

MV

5

SW2

OFF

OFF

OFF

OFF

ON

ON

ON

ON

123456

123456

123456

123456

OFF

OFF

OFF

OFF

ON

ON

ON

ON

1234567

1234567

123456

12345677

LED on indoor board for service

Mark Meaning Function

LED1 Main power supply

Power supply for

LED2

MA-Remote controller

Main power supply (Indoor unit:220-240V)
Power on Lamp is lit.

Power supply for MA-Remote controller
on Lamp is lit.

NOTES:

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

2. In case of using MA-Remote controller, please connect to TB15.
(Remote controllerwire is non-polar.)

3. In case of using M-NET, please connect to TB5. (Transmission wire is non-polar.)

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

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

6. The setting of the SW2 dip switches differs in the capacity. For the detail, refer to
the table above.

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.

SW3

<+1>

8

9

8

9

8

9

8

9

10

10

10

10

14

PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2

TO OUTDOOR UNIT
TO MA­CONTROLLER
DC8.7-13V

TB15

MODELS

P20VBM

P25VBM

P32VBM

P40VBM

LED on indoor board for service

Mark Meaning Function

Main power supply

LED1

Power supply for

LED2

MA-Remote controller

OFF

OFF

OFF

OFF

ON

ON

ON

ON

BC CONTROLLER

REMOTE

REMOTE CONTROLLER

DC24-30V

M1

1

M2

2

(SHIELD)

TO NEXT
INDOOR
UNIT

S

TB5

BLK

PULL BOX

TB2

CNMF2

(

WHT

RED

MF

5

MS

3~

BLU

1

BLU

2

ORN

1

ORN

3

CN6V1

(

GRN

BRN
RED

ORN

YLW

GRN

VANE

1

6

M

MV

*See fig : 1

5

<1>

SW2

123456

123456

123456

123456

Main power supply (Indoor unit:220-240V)
Power on → Iamp is lit

Power supply for MA-Remote controller
on → Iamp is lit

OFF

OFF

OFF

OFF

ON

ON

ON

ON

SW3

1234567

1234567

123456

12345677

8

9

10

8

9

10

8

9

10

8

9

10

LN

BLU

864 2

)

CN2M

(

BLU

)

M-NET

CN3A

(

BLU

)

REMOCON

)

123456

A.B

FUSE

(

15A)

YLW
/

GRN

CND(BLK

513

FUSE

DSA

ZNR02

U

1357

LED2

4

CN42

(

RED

ADDRESS

1

31

CN32(WHT
REMOTE SWITCH

SW2

12345678910

SW5

SW1

12345678910

SW12

0

9

8

7

6

5

10ths

DIGIT

BREAKER

(

15A)

)

ZNR01

U

1

2

CNMF1

(

)

SW3

240V220V

SW11

1

2

8

3

7

4

DIGIT

POWER SUPPLY

~

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

DC311

~

WHT

)

SWE

ON OFF

)

SW4

12345

4

0

1

SWC

9

2



3

4

6

5



1s

339V

(RED)

ADDRESS

CN43

SW14

0

1

F

E

D

C

B

A

8

9

BRANCH

No.

X1

ADDRESS

CN81(RED

4

1

(RED)

ADDRESS

2

CN82

3

4

5

6

7

1

3

CNP

(

YLW

)

D.U.M

CN20

(

RED

INTAKE

CN25

(

4

CN41

(

WHT

)

HA

1

(

WHT

CN51

CENTRALLY

CONTROL

)

81

REMOTE

INDICATION

8

1

)

WHT

5

)

CN52

(

GRN

8

)

CN27

LED1

CN31

2
1

2
1

2
1

(

)

(

WHT

DRAIN

CN60

(

WHT

LEV

RED

)

5

1

I.B

3

)

1

6

)

1

4

1

CN44

(

WHT

LIQUID

/

GAS

1

BLU

BLU

M

1~

DP

DS

t°

BRN
RED
BLU
ORN
YLW
WHT

M

LEV

TH21

t°

t°

TH23

t°

TH22

)

[LEGEND]

SYMBOL NAME
I.B INDOOR CONTROLLER BOARD

CONNECTOR

CN25
CN27
CN32
CN51
CN52
SW2
SW3
SW4
SWE
ZNR VARISTOR
FUSE FUSE
X1 AUX.RELAY
LED1 POWER SUPPLY (I.B)
LED2 POWER SUPPLY (I.B)

MF
MV
DP

HUMIDIFIER
DAMPER
REMOTE SWITCH
CENTRALLY CONTROL
REMOTE INDICATION

SWITCH

CAPACITY CORD
MODE SELECTION
MODEL SELECTOR

DRAIN UP MACHINE(TEST MODE

(T6.3AL 250V)

DRAIN PUMP

FAN MOTOR
VANE MOTOR
DRAIN-UP MACHINE

SYMBOL NAME

DS

DRAIN SENSOR

TB2

TERMINAL
TB5
TB15
TH21

TH22

TH23

)

LEV LINEAR EXPANSION VALVE
A.B CIRCUIT BOARD

SW1
SW5
SW11
SW12
SW14 BRANCH No.

POWER SUPPLY
TRANSMISSION

BLOCK

MA-REMOTE CONTROLLER

THERMISTOR

ROOM TEMP. DETECTION

(0°C/15kΩ, 25°C/5.4kΩ)

PIPE TEMP. DETECTION / LIQUID

(0°C/15kΩ, 25°C/5.4kΩ)

PIPE TEMP. DETECTION / GAS

(0°C/15kΩ, 25°C/5.4kΩ)

MODE SELECTION

SWITCH

VOLTAGE SELECTION
ADDRESS SETTING 1s DIGIT
ADDRESS SETTING 10ths DIGIT

NOTES:

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

2.In case of using MA-Remote controller, please connect to TB15.
(Remote controller wire is non-polar.)

3.In case of using M-NET, please connect to TB5. (Transmission line is non-polar.)

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

5.Symbols 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.

15

REFRIGERANT SYSTEM DIAGRAM7

PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E
PMFY-P20VBM-E
PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2

1 PMFY-P25VBM-E1 PMFY-P32VBM-E1 PMFY-P40VBM-E1

Heat exchanger

Strainer (#100mesh)

Room temperature thermistor TH21

Service Ref.

Item

PMFY-P20, P25, P32, P40VBM-E
PMFY-P20, P25, P32, P40VBM-E
PMFY-P20, P25, P32, P40VBM-E#2

Gas pipe

Liquid pipe

Gas pipe
temperature
thermistor TH23

Liquid pipe
temperature
thermistor TH22

+1 +2

Linear expansion valve

Unit:mm(inch)

:12.7(1/2")

:6.35(1/4")

Strainer (#50mesh)

Gas pipe

Flare connection

Liquid pipe

Strainer (#100mesh)

1

Capillary tube +1

Capillary tube +2

PMFY-P20, P25VBM-E
PMFY-P20, P25VBM-E

1

PMFY-P20, P25VBM-E#2

O.D.:4.6 % I.D.:3.4 % 1200

O.D.:3.6 % I.D.:2.4 % 180

Unit:mm

PMFY-P32, P40VBM-E
PMFY-P32, P40VBM-E
PMFY-P32, P40VBM-E#2

O.D.:3.6 % I.D.:2.4 % 1200

1

16

8

TROUBLE SHOOTING

8-1. HOW TO CHECK THE PARTS
PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E

PMFY-P20VBM-E

1 PMFY-P25VBM-E1 PMFY-P32VBM-E1 PMFY-P40VBM-E1

PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2

Parts name Check points

Room temperature
thermistor (TH21)

Liquid pipe temperature
thermistor (TH22)

Gas pipe temperature
thermistor (TH23)

Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10~30)

Normal

4.3k~9.6k

Abnormal

Open or short

Refer to the next page for the details.

Vane motor (MV)

Yellow



MV

Red



Brown





Green

Linear expansion
valve(LEV)

M













Blue

Brown

Yellow

Orange

Red

White

Drain-up
mechanism (DP)

Blue

Blue



Orange

1

3

Measure the resistance between the terminals with a tester.
(At the ambient temperature 20~30)

NormalConnector Abnormal

Brown — Yellow

Brown — Red

Brown — Orange

380 $7% Open or short

Brown — Green

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

Abnormal

Open or short

(1)-(5)

White-Red

Normal

(2)-(6)

Yellow-Brown

(3)-(5)

Orange-Red

(4)-(6)

Blue-Brown

150k $10%

Measure the resistance between the terminals with a tester.
(At the ambient temperature 20)

Normal Abnormal

400~480 Open or short

Refer to the next
page for the details.

Drain sensor (DS)

1
2
3

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

Normal

0.6k~6.0k

Abnormal

Open or short

Refer to the next page for the details.

17

<Thermistor Characteristic graph>

Thermistor for
lower temperature

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

< Thermistor for lower temperature >

50

40

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

Rt=15exp { 3480( ) }

1

273+t

1

273

0: : 15k'
10: : 9.6k'
20: : 6.3k'
25: : 5.4k'
30: : 4.3k'
40: : 3.0k'

Thermistor for

Drain sensor(DS)

lower temperature

Thermistor R

0=6.0k' ± 3%

Fixed number of B=3390 ± 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'

30

20

Resistance (k)

10

0

-20 -10 0 10 20 30 40 50

Temperature ()

< Thermistor for drain sensor >

10

9

8

7

6

5

4

Resistance (k)

3

2

1

0

-20 0 20 40 60 80

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

DC12V

Linear expansion valve

4

M

6

2

5

White

1

Red

3

Orange

Blue

Brown

Yellow

:4

:3

:2

:1

Brown

Red

Blue

Orange

Yellow

White

Connector (CN60)

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.

6

5

4

3

2

1

Drive circuit

:4

:3

:2

:1

18

<Output pulse signal and the valve operation>

Output

(Phase)

{1

{2

{3

{4

Linear expansion valve operation

2

Valve position (capacity)

A

1

ON

ON

OFF

OFF

Close

E

Output

2

OFF

ON

ON

OFF

Open

3

OFF

OFF

ON

ON

D

4

ON

OFF

OFF

ON

C

2000 pulse
Opening a valve
all the way

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

The output pulse shifts in above order.

• When linear expansion valve operation stops, all output phase
become OFF.

• At phase interruption or when phase does not shift in order, motor
does not rotate smoothly and motor will lock and vibrate.

• 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 position.

• When the valve move smoothly, there is no sound 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 sound
can be heard than normal situation.

• Sound can be detected by placing the ear against the screw driver
handle while putting the screw driver to the linear expansion valve.

Extra tightning (80~100pulse)

Trouble shooting

3

B

Pulse number

Symptom

Operation circuit
failure 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 con-

nect LED for checking.

Pulse signal will be sent out for 10 seconds as soon as the

main switch is turned 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) with 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

Thermistor
(Liquid pipe)

Linear
expansion
valve

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 con-

nector.

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 controller,
it means the valve is not closed all the way.

6
5
4
3
2
1

Countermeasures

Exchange the indoor con­troller board at drive circuit
failure.

Exchange the linear expan­sion valve.

Exchange the linear expan­sion valve.

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

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

19

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. Give 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.



Self check
Conditions : The indoor fan does not rotate.

Turn OFF the power supply.
Wiring contact check
Contact of fan motor connector (FAN) (CNMF1, 2)
Contact of power supply cable.

Was contact good?

Yes

Fan motor check
Measure the resistance between the fan motor connecter
FAN(+) and (–)
CNMF1(+) and CNMF2(-)
(With the connector pulled out from the

Is the resistance 1M

Turn ON the power supply.
Power supply check
Check the voltage of the indoor
Approx. 294~325V DC between the connecter < (FAN) (+) and (–) > < (CNMF1)(+) and (CNMF2)(-) >

 or more?

Yes

No

controller board with the connector (FAN) (CNMF1, 2)connected to the board.

No

Is the voltage normal?

Yes

Correct wiring connection.

board)

No

Replace the fan motor.

Indoor controller board fuse check
Turn off the power supply and check if there is
any broken wire by using a tester.

Is the fuse normal?

No

Replace the fuse.

Yes

Replace the indoor controller board.

Fan motor position sensor signal check
Rotate the fan motor more than one turn slowly and check the voltage between the connector
< (FAN) (+) and (–) > < CNMF2(+) and (-) > with the connector (FAN) (CNMF1, 2)connected to the board.

Does the voltage repeat 0V DC and 15V DC ?

Yes

No

Replace the fan motor.

Replace the indoor controller board.

20

8-3. FUNCTION OF DIP SWITCH
PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E

PMFY-P20VBM-E

1 PMFY-P25VBM-E1 PMFY-P32VBM-E1 PMFY-P40VBM-E1

PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2

Switch Function Remarks

Pole

ON OFF

Thermistor <Room temperature

Operation by switch

SW1

Mode

Selection

SW2

Capacity

code

setting

1

detection> position

2

Filter clogging detection

3

Filter cleaning sign

4

Fresh air intake

5

Switching remote display

6

Humidifier control

7

Air flow at

8

Heat thermo OFF

9

Auto restart function

10

Power source ON/OFF

Capacity

1~6

P20 P32

P25 P40

Bult-in remote controller

Provided

2,500h

Effective

Thermo ON signal indication

Fan operation at Heating mode

Low +

Setting air flow

Effective

Effective

SW 2 Capacity SW 2

ON

OFF

1234 56

ON

OFF

1234 56

Indoor unit

Not provided

100h

Not effective

Fan output indication

Thermo On operation at heating mode

Extra low +

Depends on SW1-7

Not effective

Not effective

ON

OFF

1234 56

ON

OFF

1234 56

Effective

timing

Under
suspension

Before
power
supply
ON

Address board

<Initial setting>

ON

OFF

1234 567 8 9

+

SW 1-7

SW 1-8

SW 1-8

OFF

OFF

Extra low

ON

OFF

Low

OFF

ON

Setting air flow

ON

ON

stop

Indoor controller board

<Initial setting>

Set for each capacity.

10

SW3

Function

Selection

SW4

Unit

Selection

Heat pump / Cool only

1

Louver

2

Vane

3

Vane swing function

4

Vane horizontal angle

5

Vane cooling limit angle setting +4

6

Indoor linear expansion

7

valve opening change

Heating 4deg. up

8

Target superheat setting +5

9

Target sub cool setting +5

10

PMFY-P·VBM-E

1~5

ON

OFF

12345

Cooling only

Available

Available

Available

Second setting +6

Horizontal angle

Effective

Not effective

—

—

PMFY-P·VBM-E

1

ON

OFF

12345

Heat pump

Not available

Not available

Not available

First setting

Down B, C

Not effective

Effective

—

—

PMFY-P·VBM-E#2

ON

OFF

12345

Under
suspension

Before
power
supply
ON

Indoor controller board

Set while the unit is off.

<Initial setting>

ON

OFF

1234 567 8 9

+4

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

10

+5 SW 3-9 setting

P20, P25 = ON
P32, P40 = OFF
SW 3-10 setting
P20, P25 = ON
P32, P40 = OFF
Please do not use SW3-9, 10
as trouble might be caused by
the usage condition.

+6 Second setting
means first setting.

Indoor controller board

21

Switch Remarks

Operation by switchPole

Effective

timing

SW11

1s digit

address

setting

SW12

10ths digit

address

setting

SW14

Branch

No.

setting

SW5

Voltage

Selection

SW1210SW11

0

9

8

7

6

5

Rotary switchRotary switch

220V 240V

2

1

2

3

4

SW14

0

1

F

E

D

C

B

A

8

9

How to set addresses

0

1

9

2

8

7

2

3

4

5

6

7

Example : If address is “3”, remain SW12

3

4

6

5

(for over 10) at “0”, and match SW11 (for 1 to 9)
with “3”.

1

How to set branch numbers SW14 (Series R2 only)
Match the indoor unit’s refrigerant pipe with
the BC controller’s end connection number.
Remain other than series R2 at “0”.

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.

Before
power
supply
ON

Address board

<Initial setting>

SW12 SW11

0

9

8

7

6

0

1

4

5

1

9

2

3

2

8

3

7

4

6

5

Address board

<Initial setting>

SW14

0

1

2

F

3

E

4

D

5

C

6

B

7

A

8

9

Address board

<Initial setting>

220V 240V

22

8-4. TEST POINT DIAGRAM

8-4-1. Indoor controller board
PMFY-P20VBM-E PMFY-P20VBM-E1
PMFY-P25VBM-E PMFY-P25VBM-E1
PMFY-P32VBM-E PMFY-P32VBM-E1
PMFY-P40VBM-E PMFY-P40VBM-E1

CN27
Damper

CN25
Humidifier

CN6V
Vane moter output
(MV)

CN52
Remote indication

CN51
Centrally control

CN41
Connector
(HA terminal-A)

CN60
Linear expansion valve
output (LEV)

SW2
Capacity setting

SW3
Mode selection

SW4
Model selection

CN32
Connector
(Remote switch)

CNP
Drain-up machine
output (DP)
Between 1 to 3
220-240V AC

CND
Power supply for
indoor controller board
Between 1 to 3
220-240V AC

FUSE

6.3A 250V

FAN
Fan motor output (MF)

CN20
Room temperature
thermistor (TH21)

CN21
Pipe temperature
thermistor/Liquid (TH22)

CN29
Pipe temperature
thermistor/Gas (TH23)

CN31
Drain sensor (DS)

LED2
Power supply for
MA-Remote controller

CN2M
Connect to the terminal block (TB5)
(M-NET transmission connecting wire)
24-30V DC (non-polar)

CN3A
Connect to the terminal block (TB15)
(MA-Remote controller connecting wire)
Between 1 to 3 8.7-13V DC (Pin1 (+))

23

LED1
Main power supply
(Indoor unit : 220-240V)

Indoor controller board

PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2

CND
Power supply

FUSE

6.3A 250V

1-3 : 220-240V AC

FAN motor

CNMF1, CNMF2

CNMF11-CNMF21 : 294-325V DC
CNMF23-1 : 15V DC
CNMF25-1 : 0-6.5V 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

LED1
Main power supply

CN31
Drain sensor (DS)

CN60
Linear expansion valve
(LEV)

CN20
Room thermistor/Liquid
(TH21)

CN44
Pipe temperature
1-2: thermistor/Liquid
(TH22)
3-4: thermistor/Gas
(TH23)

Connector (Remote switch)

CN32

SW2
Capacity setting

SW3
Function setting

SW4
Model setting

CN51
Centrally control

CN52
Remote indication

24

8-4-2. Adress board

PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E
PMFY-P20VBM-E1 PMFY-P25VBM-E1 PMFY-P32VBM-E1 PMFY-P40VBM-E1
PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2

SW5

SW1
Function setting

Voltage selector

SW12
Address setting
10ths DIGIT

SW11
Address setting
1s DIGIT

SW14
Branch No.

25

9

DISASSEMBLY PROCEDURE

PMFY-P20VBM-E PMFY-P25VBM-E PMFY-P32VBM-E PMFY-P40VBM-E
PMFY-P20VBM-E

1 PMFY-P25VBM-E1 PMFY-P32VBM-E1 PMFY-P40VBM-E1

PMFY-P20VBM-E#2 PMFY-P25VBM-E#2 PMFY-P32VBM-E#2 PMFY-P40VBM-E#2

Be careful about removing heavy parts.

OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS

1. Removing the intake grille

Opening the air intake grille

PUSH

(1) Press the
(2) Put your figure on the both ends of nut of the air intake

grille and put it down after the grille clicked.

Removing the air intake grille

(1) Press the

ends of nut with your fingers after the grille clicked.
(See Figure 1)
(2) Pull out the handle of air intake grille strongly toward you.

(See Figure 2)
(3) Draw the string of air intake grille to prevent the grille from

dropping.(See Figure 3)

of the air intake grille.(See Figure 1)

PUSH

of air intake grille, and pull down the both

Photo 1

Air filter

Figure 1

26

Figure 2

Figure 3

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 (Liquid, Gas),
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 white insulation material 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 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.
(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

Heat exchanger

Insulation material

Nozzle

Electrical parts

Electrical parts
cover

Address board
cover

Soft side of insulation

Vane motor

4. Removing the vane motor

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

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

2727

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), (CN44) on the

indoor controller board.
Connector (CN21) / Liquid (VBM

(1))

(CN29) / Gas (VBM(1))
(CN44) / Liquid and Gas (VBM#2)

28

10

PARTS LIST (non-RoHS compliant)

PANEL PARTS FOR PMFY-P20/25/32/40VBM-E
PMP-40BM

11

12

1

11

2

3

4

5

2

3

4

10

5

6

9

7

8

No. Part No. Part Name

1

T7W E11 003

2

R01 E00 055
3
4

R01 E00 099
5

R01 E01 054
6

R01 E01 500
7

R01 E02 500
8

TW7 E01 691
9

R01 E00 054

10

R01 E00 648

11

R01 E00 044

12

R01 E00 096

13

—

—

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

13

TEMP.

Q'ty/set

Specification

PAR-21MAA R.B

PMP-40BM

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

ON/OFF

Remarks

(Drawing No.)

(DT88D360H03)

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

2929

FUNCTIONAL PARTS
PMFY-P20VBM-E
PMFY-P25VBM-E
PMFY-P32VBM-E
PMFY-P40VBM-E

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.

No.

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

Part No. Part Name Specification

—

—
R01 22A 102
R01 005 103
R01 E02 114
R01 E00 079
R01 E00 092
T7W E48 480
T7W E49 480
R01 E10 529
R01 E00 202
R01 E00 038
R01 E01 202
R01 E66 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

CABINET
ADDRESS BOARD COVER
BEARING MOUNT
SLEEVE BEARING
LINE FLOW FAN
STABILIZER ASSY
VANE SLEEVE
HEAT EXCHANGER
HEAT EXCHANGER
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

Q'ty/set

PMFY-P · VBM-E

20, 25 32, 40

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

17

16

15
14

13

12

11

Remarks

(Drawing No.)

(DT00A478G88)
(RG02L277H02)

(RG00L311G11)

Wiring

Diagram

Symbol

TH21

TH22

LEV

TH23

MV

DS
DP

MF

Recom-

mended

Q'ty

30

ELECTRICAL PARTS
PMFY-P20VBM-E
PMFY-P25VBM-E
PMFY-P32VBM-E
PMFY-P40VBM-E

RG79L094H01

8

1

CN60

FAN

7

2

3

CN6V

CNP

4

No. Part No. Part Name

1

T7W A14 716

2

T7W E00 716

3

T7W 515 716

4

T7W B01 294

5

R01 E00 304

6

T7W 520 239

7

T7W E35 310

8

—

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

Specification

3P (L,N,)
3P (M1,M2,S)
2P(1,2)

250V 6.3A

5

Q'ty/set

PMFY-

P20/25/32/40

VBM-E

1
1
1
1
1
1
1
1

6

Remarks

(Drawing No.)

(RG02B337G16)

Wiring

Diagram

Symbol

TB2
TB5

TB15

A.B

FUSE

I.B

Recom-

mended

Q'ty

31

11

RoHS PARTS LIST

PANEL PARTS
PMP-40BM (FOR PMFY-P20/25/32/40VBM-E

(1))

PMP-40BMW (FOR PMFY-P20/25/32/40VBM-E#2)

11

12

11

2

3

1

4

5

2

3

4

10

5

6

9

7

8

No.

1

2
3
4
5
6
7

8

9
10
11

12

13

Part No. Part Name Specification

RoHS

G

T7W E16 003

G

T7W E22 003

G

R01 E01 055
G
G

R01 E01 099
G

R01 E07 054
G

R01 E14 500
G

R01 E15 500
G

T7W E04 691
G

T7W E06 691
G

R01 E06 054
G

R01 E01 648
G

R01 E01 044
G

R01 E04 096
G

R01 E07 096
G

—

—

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

PAR-21MAA

Q'ty/set

PMP-

40BM

1

2
2
2
2
1
1
1

2
1
2
1

1

TEMP.

PMP-

40BMW

1
2
2
2
2
1
1

1
2
1
2

1
1

ON/OFF

Remarks

(Drawing No.)

(DT88D360H03)

13

Wiring

Diagram

Symbol

R.B

Recom-

mended

Q'ty

32

FUNCTIONAL PARTS
PMFY-P20VBM-E
PMFY-P25VBM-E
PMFY-P32VBM-E
PMFY-P40VBM-E
PMFY-P20VBM-E

1

PMFY-P25VBM-E1
PMFY-P32VBM-E1
PMFY-P40VBM-E1
PMFY-P20VBM-E#2
PMFY-P25VBM-E#2
PMFY-P32VBM-E#2
PMFY-P40VBM-E#2

25

24

1

2

23

19

3

22

21

4

5

6

7

18

17

16

15

20

12, 14

8

13

12

9

10

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

No.

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

G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G

Part No. Part Name

RoHS

—

—
R01 23A 102
R01 E04 103
R01 E32 114
R01 E01 079
R01 E02 092
T7W H06 480
T7W H07 480
T7W H94 480
T7W H95 480
R01 E30 529
R01 H12 202
R01 E03 038
R01 H16 202
R01 N15 202
R01 H06 401
R01 H17 202
R01 E16 002
R01 E18 223
R01 E05 110
R01 32K 241
R01 E11 266
T7W E09 355
R01 E35 130
R01 E24 220
R01 E45 220
R01 E49 220
R01 E13 105
R01 E05 527

—
R01 E03 673

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

Specification

ROOM

LIQUID
LIQUID/GAS

GAS

Q'ty/set

PMFY-

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

P·VBM-E

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

P·VBM-E

20,25 32,40 20,25 32,40

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

11

1

P·VBM-E#2

20,25 32,40

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

Remarks

(Drawing No.)

(DT00A478G88)

1

(RG02L277H02)

1
1
1
1
1

1

1
1
1
1

1
1

1

1

1
1
1
1
1

1
1
1

(RG00L311G25)

1
1

Wiring

Diagram

Symbol

TH21

TH22

TH22/23

LEV

TH23

MV

DS
DP

MF
MF
MF

Recom-

mended

Q'ty

33

ELECTRICAL PARTS
PMFY-P20VBM-E
PMFY-P25VBM-E
PMFY-P32VBM-E
PMFY-P40VBM-E
PMFY-P20VBM-E

1

PMFY-P25VBM-E1
PMFY-P32VBM-E1
PMFY-P40VBM-E1
PMFY-P20VBM-E#2
PMFY-P25VBM-E#2
PMFY-P32VBM-E#2
PMFY-P40VBM-E#2

RG79L094H01

CN60

FAN

CN6V

CNP

No. Part No. Part Name

RoHS

1

G

2

G

3

G
G

4

G
G

5

G

6

G
G

7

G

8

G
G

—
T7W E32 716
T7W E35 716
T7W E36 716
R01 E44 246
T7W E01 294
R01 E07 304
R01 E10 304
R01 E06 239
T7W E52 310
T7W E66 310
R01 N77 310

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

Specification

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

250V 6.3A

Q'ty/set

PMFY-P20/25/32/40

VBM-E

VBM-E1

1
1
1
1

1
1

1
1

1
1
1
1

1
1

1

1

VBM-E#2

1
1
1

1
1

1
1

1

Remarks

(Drawing No.)

(RG02B337G19)

Wiring

Diagram

Symbol

TB2

TB5
TB15
TB15

A.B

FUSE

I.B
I.B
I.B

Recom-

mended

Q'ty

34

35

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN

cCopyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
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 Sep. 2008
Specifications subject to change without notice