Mitsubishi PLFY-P32VKM.UK, PLFY-P40VKM.UK, PLFY-P50VKM.UK, PLFY-P63VKM.UK Service Manual

TECHNICAL & SERVICE MANUAL

SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS

Indoor unit

PLFY-P32VKM

PLFY-P32VKM.UK

PLFY-P40VKM

PLFY-P40VKM.UK

PLFY-P50VKM

PLFY-P50VKM.UK

PLFY-P63VKM

PLFY-P63VKM.UK

No. OC204

[Model names]

INDOOR UNIT

Ceiling Cassettes

Series PLFY

CONTENTS

1. SAFETY PRECAUTION ·······················3

2. PART NAMES AND FUNCTIONS········4

3. SPECIFICATIONS·································6

4. OUTLINES AND DIMENSIONS············8

5. WIRING DIAGRAM·······························9

6.

REFRIGERANT SYSTEM DIAGRAM

···10

7. TROUBLE SHOOTING ·······················11

8. DISASSEMBLY PROCEDURE···········16

9. PARTS LIST········································19

R407C

[Service Ref.]

R22

3

SAFETY PRECAUTION

1

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

· Do not use the existing refrigerant piping.

-The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause the
refrigerator oil of the new unit to deteriorate.

· Do not use crushed, misshapen, or discoloured tubing.
The inside of the tubing should be clean and free from harmful sulfuric compounds, oxidants, dirt, debris, oils and

moisture(or any other contaminants).

-Contaminants on the inside of the refrigerant piping may cause the refrigerant residual oil deteriorate.

· Store the piping to be used during installation indoors and keep both ends of the piping 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 liquid refrigerant to fill 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 refrigerator oil to deteriorate.

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

-The vacuum pump oil may flow back into the refrigerant cycle and cause the refrigerator oil to deteriorate.

· Use ester oil, ether oil or alkyl benzene(small amount) as the refrigerator oil to coat flares and flange connections.

-The refrigerator oil will degrade if it is mixed with a large amount of mineral oil.

· Do not used the following tools that are used with conventional refrigerants.
(Gauge manifold, charge hose, charging cylinder, gas leak detector, reverse flow check valve, refrigerant charge

base, vacuum gauge, refrigerant recovery equipment)

-If the conventional refrigerant and refrigerator oil are mixed in the R407C , the refrigerant may deteriorated.

-If water is mixed in the R407C, the refrigerator oil may deteriorate.

-Since R407C dose not contain any chlorine, gas leak detectors for conventional refrigerants will not react to it.

· Be especially careful when managing the tools.

-If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deteriorate.

· Do not use a charging cylinder.

-Using a charging cylinder may cause the refrigerant to deteriorate.

4

2

PART NAMES AND FUNCTIONS

● Indoor (Main) Unit

● Remote controller

● Operation buttons

[PAR-F25MA]

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

Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.

Grille

Filters
Removes dust and pollutants
from intake air

Horizontal Air Outlet
Sets horizontal air flow automatically
during cooling or dehumidifying.

Air Intake
Intakes air from room.

Press this button to switch the cool,
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 sets the ventilation fan speed.

VENTILATION button

This switches the horizontal fan
motion ON and OFF.

(This button does not operate in this
model)

(When the only LOSSNAY is connected.)

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

5

Caution

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

● When power is turned ON for the first time the (CENTRAL CTRL) display appears to go off momentarily but this is not a

malfunction.

● 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 is 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 has disappeared then start the operation.

4

CENTRALLY
CONTROLLED display

This indicates when the unit is
controlled 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 displays 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

This indicates when the standby
mode is set from the time the sleep
operation starts until the heating air
is discharged.

DEFROST display

This indicates when the defrost
operation is performed.

CHECK display

This indicates when a malfunction
has occurred in the unit which should
be checked.

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.

● Display

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.

Operation lamp

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

POWER display

This lamp lights when electricity is
supplied to the unit.

SET TEMPERATURE display

This displays the selected setting
temperature.

FAN SPEED display

This displays the air direction.

ROOM TEMPERATURE display

The temperature of the suction air is
displayed during operation. The
display range is 8° to 39°C. The
display flashes 8°C when the actual
temperature is less than 8° and
flashes 39°C when the actual
temperature is greater than 39°C.

display

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

CHECK MODE

TEST RUN

FILTER display

This lamp lights when the filter need
to be cleaned.

AIR DIRECTION display

The selected fan speed is displayed.

3

SPECIFICATIONS

3-1. Specification

Item

Power

Cooling

capacity

Heating

capacity

Cooling

Power
supply

Heating

Cooling

Starting

current

Heating

Cooling

Power

factor

Electric characteristic

(munsell symbol)

Dimensions

Heating

Exterior

Height

Width

Depth

Heat exchanger

Fan ✕ No

F

Air flow #3

a

External

n

static pressure

Fan motor

output

Insulator

Air filter

Pipe

dimensions

Gas
side

Liquid

side

Unit drain pipe size

Noise level

Product weight

V·Hz

kcal/h

BTU/h

kW

kcal/h

BTU/h

kW

kW

kW

A

A

%

%

mm

mm

mm

3

m

/min

Pa

kW

ømm

ømm

mm

dB

kg

PLFY-P32VKM.UK PLFY-P40VKM.UK PLFY-P50VKM.UK PLFY-P63VKM.UK

Single phase 220V-240V 50 Hz

3,150

12,500

3.7

3,550

14,100

4.1

0.13

0.13

0.60

0.60

90

90

4,000

15,900

4.7

4,500

17,900

5.2

0.13

0.13

0.60

0.60

90

90

5,000

19,800

5.8

5,600

22,200

6.6

0.14

0.14

0.64

0.64

91

91

6,300

25,000

7.3

7,100

28,200

8.3

0.15

0.15

0.68

0.68

92

92

-Unit : Galvanized sheets · Standard grill : ABS resin acrylic coating Munsell<0.70y 8.59/0.97>

298<30>

660<760>

660<760>

Cross fin

Turbo fan ✕ 1

15-14.5-14-13

16-15-14-13

17-16-15-14

0

0.030

Polyethylene sheet

PP honeycomb fabric

12.7(1/2")

6.35(1/4")

15.88(5/8")

9.52(3/8")

ID32 (PVC pipe VP-25 connectable)

35-34-32.5-31

19<3.7>

37-35.5-34-32

39-38-36.5-35

20<3.7>

Note 1. Rating conditions (JIS B 8615)

Cooling: Indoor: D.B. 27°C, W.B. 19.5°C

outdoor: D.B. 35°C

Heating: Indoor: D.B. 21°C

outdoor: D.B. 7°C, W.B. 6°C
Note 2. The number indicated in < > is just for the grill.
Note 3. Air flow and the noise level are indicated as High-Medium 1-Medium 2-Low.

6

3-2. Electrical parts specifications

Model

Symbol

Parts name

PLFY-P32VKM.UK PLFY-P40VKM.UK PLFY-P50VKM.UK PLFY-P63VKM.UK

Transformer

Room temperature
thermistor

Liquid pipe thermistor

Gas pipe thermistor

Fuse
(Indoor controller board)

Fan motor
(with inner-thermostat)

inner-thermostat
(Fan motor)

Fan motor capacitor

T

TH21

TH22

TH23

FUSE

MF

C1

(Primary) 50/60Hz 220-240V (Secondary) (18.4V 1.7A)

Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ

Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ

Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ

250V 6.3A

6-pole OUTPUT 30W

PAI-V30F

OFF 125°C ± 5°C

ON 85°C ± 20°C

2.5µF ✕ 400V

Vane motor
(with limit switch)

Drain-up mechanism

Drain sensor

Linear expansion valve

Electric heater
(Dew prevention)

Power supply terminal
block

Transmission terminal
block

MV

DP

DS

LEV

H2

TB2

TB5

Heater resistance 82Ω/25°C
Thermistor resistance

0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ

MC8 200V-240V

2.5/2W 5/6R.P.M

PJV-1002

INPUT 8/7.5W 24L/Hr

DC12V Stepping motor drive port

dimension 3.2Ω (0~2000pulse)

EDM-402ME

240V 28.8W

(L, N, Earth) 330V 30A

(M1, M2, S) 330V 30A

7

8

4

OUTLINES AND DIMENSIONS

PLFY-P32VKM.UK, PLFY-P40VKM.UK
PLFY-P50VKM.UK, PLFY-P63VKM.UK

Unit : mm

Models

PLFY-P32VKM.UK
PLFY-P40VKM.UK

Refrigerant pipe

(6.35mmdia)

flared connection

1/4F

Refrigerant pipe

(12.7mmdia)

flared connection

1/2F

Refrigerant pipe

(9.52mmdia)

flared connection

3/8F

Refrigerant pipe

(15.88mmdia)

flared connection

5/8F

PLFY-P50VKM.UK
PLFY-P63VKM.UK

12

Ceiling hole

Suspension bolt pitch

Suspension bolt M10 or

Air intake hole

Air outlet hole

Air intake grille

690~710 25~3525~35

640

660

466

460

66 35

760

117 117

117

435

13554

117

Ceiling hole

Suspension bolt pitch

Suspension bolt lower edge

Air outlet hole

Air outlet hole

690~710

25~35

25~35

65~80

760

460

466

6635

115

243

253

29830

54

+3

- 2

507

660

54

53

Terminal block for powersupply

Terminal block for
control

Drain hole

Drain hole ID32
VP-25 connection

W3/8

Feeding hole
(Drain pump)

Leave space of 10~15mm between the
top surface of the unit and the ceiling slab.

Ceiling surface

4-Auto vanes

Intake grille opening
/closing side

Vane motor

Decorative panel

Control wire entry

Refrigerant piping side
electric wire entry side

Power line entry

41 25

Liquid pipe

Gas pipe

Optional
high-efficiency filter

+3

-2

NOTE 1.The electrical parts box may be removed during servic­ ing. When connecting the power line and the control

wire,provide enough length to the electric wires.
NOTE 2.When installing the optional high-efficiency filter,the

dimension between the transom and ceiling shall be
more than 440mm. Also,when installing the optional

fresh air intake casement or the multi-functional case­ ment,the dimension between the transom and ceiling
shall be more than 440mm. (The optional high­ efficiency filter can also be installed.)

9

WIRING DIAGRAM

5

PLFY-P32VKM.UK, PLFY-P40VKM.UK
PLFY-P50VKM.UK, PLFY-P63VKM.UK

}

PE

GRY

GRY

BLK

BLK

BLK

BLK

BLK

BLK

RED

RED

WHT

RED

YLW

ORN

BRN

BLU

M1

TO OUTDOOR UNIT

BC CONTROLLER
REMOTE CONTROLLER

DC24-30V

M2

TB5

(SHIELD)

AC18.4V

AC220-240V

BLU

RED

BLU

BLU

BRN

BRN

YLW

YLW

YLW

YLW

WHT

RED

RED

WHT

BLK

(WHT)

FAN1

CNT

(WHT)

TRANS

(GRN)

CNV

(BLU)

CNP

6.3A

250V

FUSE

(RED)

CND

CN3T
TRANS
(RED)

BLU

BLU

M-NET

(BLU)

CN2M

BRN

BRN

CN23

(GRN)
VANE
POSITION

4

1

CN41

(WHT)

HA

1

CN32

3

(WHT)
REMOTE
SWITCH

CN50

DRAIN

(RED)

CN20

(RED)

INTAKE

CN21

LIQUID

(WHT)

CN29

(BLK)

GAS

CN60

LEV

(WHT)

5

(WHT)

CENTRALLY

CONTROL

1

CN51

1

5

(WHT)

REMOTE

INDICATION

CN52

CN42

(RED)

ADDRESS

CN81

(RED)

ADDRESS

12

HUMIDIFIER

CN25

A.B

SW5

240V

220V

SWA

3
2
1

SWB

2
3
4

1

2

3

4

CN43

ADDRESS

(RED)

1

2

3

4

5

6

7

8

ADDRESS

CN82

(RED)

CONNECTION

No.

SW14

0

SWC

SW1

87654321

OFF

ON

109

00

SW11

SW12

1ST.DIGIT

2ND.DIGIT

3RD.DIGIT

6

BLU

RED

GRN/YLW

L
N

TB2

TO NEXT
INDOOR UNIT

PULL BOX

FUSE(15A)

BREAKER
(15A)

POWER SUPPLY
~/N 220-240V
50Hz

SR3

SR1

ZNR

DS

4

I.B

8

TH21

SW2

SEE

fig1

SEE

fig2

10

LEV

TH22

TH23

T

32

SW4

1

10N12345678923456

SW3

0FF

LED4

LED3

LED5LED2

LED1

4

0N
0FF

27 510 61

H2

GRILLE

MV

LS

1

53

X4

X4

87 23456

F.C

1

1
2

4

3

65 1234211342

MF

1432

13

13

13

13

64523

DP

21

C

321

123

31

14532122112

1

1
2

1
2

LEGEND

SYMBOL

NAME

I.B

SYMBOL

T TRANSFORMER

DRAIN SENSOR
DRAIN WATER LIFTING-UP MACH.
FAN MOTOR (WITH INNER THERMO.)
FAN MOTOR CAPACITOR
VANE MOTOR
LIMIT SWITCH
DEW PREVENTION HEATER
POWER SUPPLY TERMINAL BLOCK
TRANSMISSION TERMINAL BLOCK
LINEAR EXPANSION VALVE
ADDRESS BOARD
MODE SELECTOR

DS
DP
MF
C
MV
LS
H2
TB2
TB5
LEV
A.B
SW1(A.B)
SW5(A.B)
SW11(A.B)
SW12(A.B)
SW14(A.B)
SWA(A.B)
SWB(A.B)

SWC(A.B)

INDOOR CONTROLLER BOARD

CN25 HUMIDIFIER CONNECTOR

REMOTE SWITCH CONNECTOR
HA TERMINAL-A CONNECTOR
CENTRALLY CONTROL CONNECTOR
REMOTE INDICATION CONNECTOR
CAPACITY CORD SWITCH
FUNCTION SELECTOR
UNIT SELECTOR
DRAIN UP MECH RELAY
DEW PREVENTION HEATER RELAY
VANE RELAY
FAN MOTOR RELAY

CN32
CN41
CN51
CN52
SW2
SW3
SW4
SR1

SR3
X4
ZNR
FUSE
F. C

VARISTOR
FUSE(6.3A)
FAN PHASE CONTROL

TH21

TH22

TH23

ROOM TEMPERATURE THERMISTOR
(0:/15k',25:/5.4k')

LIQUID PIPE THERMISTOR
(0:/15k',25:/5.4k')

GAS PIPE THERMISTOR
(0:/15k',25:/5.4k')

VOLTAGE SELECTOR
1ST DIGIT ADDRESS SETTING
2ND DIGIT ADDRESS SETTING
CONNECTION NO.
CEILING HEIGHT SELECTOR

DISCHARGE AIR DIRECTION

OPTION SELECTOR

NAME

NOTE

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 for the capacity.
For the detail,see the table below.

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.

PLFY-P32VKM.UK

MODELS SW2

ON

OFF

1234

ON

OFF

1234

56

56

ON

OFF

123456

ON

OFF

123456

SW2

<fig1> <fig2>

MODELS

PLFY-P40VKM.UK

PLFY-P50VKM.UK

PLFY-P63VKM.UK

PLFY-P32VKM.UK
PLFY-P40VKM.UK

PLFY-P50VKM.UK
PLFY-P63VKM.UK

MODELS SW3

ON

OFF

1234

ON

OFF

1234

56789

10

6789

10

5

10

6 REFRIGERANT SYSTEM DIAGRAM

Strainer (#50mesh)

Strainer (#100mesh)

Strainer (#100mesh)

Heat exchanger

Room temparature thermistor TH21

Gas pipe thermistor TH23

Liquid pipe thermistor TH22

Linear expansion valve

Gas pipe

Flare connection

PLFY-P32VKM.UK, PLFY-P40VKM.UK
PLFY-P50VKM.UK, PLFY-P63VKM.UK

Gas pipe

Liquid pipe

PLFY-P32,P40VKM.UK

[12.7<1/2F>

[6.35<1/4F>

PLFY-P50,P63VKM.UK

[15.88<5/8F>

[9.52<3/8F>

Item

Service Ref.

7

TROUBLE SHOOTING

7-1. How to check the parts PLFY-P•VKM.UK

Parts name Check points

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

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

Normal

4.3kΩ~9.6kΩ

Abnormal

Open or short

(Refer to the thermistor)

Trans

CNT T CN3T

Red Blue

1
2
3

White

Blue

Vane motor

Fan motor

Relay connector

1

Red

White

2

3

Black

Protector

Linear expansion
valve

1

White

M

5

Red

4

6

2

3

Orange

Drain-up
mechanism

Gray

1

2

Gray

1
2
3

1

2

3

Blue

Brown

Yellow

Disconnect the connector and measure the resistance using a tester.

Abnormal

Open or short

CNT(1)~(3)

CN3T(1)~(3)

Normal

Approx. 45Ω

Approx. 1Ω

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

Normal Abnormal

Approx. 14kΩ Open or short

Measure the resistance between the terminals using a tester.

Motor terminal

or

Relay connector

Red-Black

White-Black

Normal

PLFY-P·VKM.UK

P32, P40, P50, P63

136.2kΩ

197.5kΩ

Abnormal

Open or short

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

Abnormal

Open or short

(1)-(5)

White-Red

Normal

(2)-(6)

Yellow-Blown

(3)-(5)

Orange-Red

(4)-(6)

Blue-Brown

150kΩ i10%

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

Normal Abnormal

327Ω Open or short

Drain sensor

Measure the resistance between the terminals using a tester.

1
2
3
4
5

(1)-(3)
(4)-(5)

Normal

82Ω

4.3kΩ~9.6kΩ

Abnormal

Open or short

(Refer to the thermistor)

11

12

Output

(Phase)

Output

{1

1

ON

{2

ON

{3

OFF

{4

OFF

2

OFF

ON
ON

OFF

3
OFF
OFF

ON
ON

4

ON
OFF
OFF

ON

<Output pulse signal and the valve operation>

➁

Linear expansion valve operation

➂

Trouble shooting

D

A

E

B

C

Open

Extra tightning (80~100pulse)

Pulse number

2000 pulse
Opening a valve
all the way

Close

Valve position (capacity)

6
5
4
3
2
1

LED1S

Symptom

Check points

Operation circuit
failure of the micro
processor.

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 turned on. If there is flashing LED it means
the operation circuit is abnormal.

Countermeasures

Exchange the indoor
controller board at drive
circuit failure.

Linear expansion
valve mechanism is
locked.

Valve doesn't close
completely
(thermistor leaking).

Wrong connection of
the connector or
contact failure.

To check the linear expansion valve, operate the indoor unit
in fan mode and at the same time operate other indoor units
in cooling mode, then check the pipe temperature <liquid

pipe temperature> of the indoor unit by the
outdoor multi controller board operation
monitor. During fan operation, linear
expansion valve is closed completely and if
there is some leaking, detecting
temperature of the thermistor will decrease.
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.
It is not necessary to exchange the linear expansion valve, if
the leakage is small and not making any trouble.

Liquid pipe
thermistor

Linear
expansion
valve

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.

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

Exchange the linear
expansion valve.

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.

Measure the resistance between each coil (red-white, red­orange, brown-yellow, brown-blue) using a tester. It is normal
if the resistance is in the range of 150" i 10%.

Short or breakage of
the motor coil of the
linear expansion
valve.

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

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

become OFF.

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

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

will be sent until point

A is reached in order to define the valve

position.

When the valve moves 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 in normal situations.

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

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

13

0

10

20

30

40

50

-20 -10 0 10 20 30 40 50

< Thermistor for lower temperature >

Temperature (:)

Resistance (k")

4

[4

3

62

5

[3

2

[2

1

[1

[4

[3

[2

[1

Controller board

Drive circuit

Relay connector

Connector(CN60)

DC12V

Brown

Red

Blue

Orange

Yellow

White

5

1

3

4

6

M

4

6

2
3

5

1

Blue

Brown

Yellow

Orange

Red

White

Linear expansion valve

<Thermistor Characteristic graph>

Room temperature thermistor(TH21)
Liquid pipe thermistor(TH22)
Gas pipe temperature thermistor(TH23)
Drain sensor(THD)

Thermistor R

0=15k' ±3%

Fixed number of B=3480k' ±2%

Rt=15exp { 3480( ) }

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

Thermistor for
lower temperature

Linear expansion valve

① Operation summary of the linear expansion valve.

• Linear expansion valve opens/closes through a stepping motor after receiving the pulse signal from the indoor controller board.

• Valve position can be changed in proportion to the number of pulse signals.
<Connection between the indoor controller board and the linear expansion valve>

1

273+t

1

273

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.

14

7-2. FUNCTION OF DIP SWITCHES

Switch Function Remarks

<At delivery>

ON

OFF

123456789

10

Address board

Operation by switch

ON OFF

(Note1) Fan operation at Heating
mode.

(Note1) Heater thermo ON is
operating.

(Note1) SW 1-7=OFF, SW 1-8=ON
→ Setting air flow.
SW 1-7=ON, SW 1-8=ON
→ Indoor fan stop.

Pole

Built-in remote controller

Provided

2,500hr

Effective

Thermostat ON signal indication

Always operated while in heating mode

Low

Setting air flow

Effective

Effective

Filter clogging detection

Filter cleaning sign

Air intake

Remote indication switching

Humidifier control

Auto reset function

Power ON/OFF

Indoor unit

Not provided

100hr

Not effective

Fan output indication

Operated depending on the condition

Extra low

Depends on SW1-7

Not effective

Not effective

Cooling only

Available

Available

Available

Second setting

Horizontal angle

Effective

Not effective

5deg.(R-22)/9deg.(R407C)

15deg.

Heat pump / Cool only

Louver

Vane

Vane swing function

Vane horizontal angle

Vane cooling limit angle setting

Heater 4deg. up

Superheat setting temperature

Superheat setting temperature

Heat pump

Not available

Not available

Not available

First setting

Down B, C

Not effective

Effective

2deg.(R-22)/6deg.(R407C)

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

1~3

SW3

Function

Selection

SW4

Unit

Selection

Indoor linear expansion
valve opening

Thermistor <intake temperature
detection> position

Air flow set in case of
heat thermostat OFF

<At delivery>

ON

OFF

123456789

10

Indoor controller board

(Note1) At cooling mode, each
angle can be used only
for 1 hour.

<At delivery>

ON

OFF

1234

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

(SW 3-9)
PLFY-P32, P40VKM.UK=ON
PLFY-P50, P63VKM.UK=OFF

ON

OFF

1234

ON

OFF

MODELS

PLFY-

P32VKM.UK

PLFY-

P50VKM.UK

PLFY-

P40VKM.UK

PLFY-

P63VKM.UK

SW 2 MODELS SW 2

123456

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

15

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

Switch

SWA

Set the

Ceiling

height

SWB

Discharge

Air

Direction

SWC

Option

Rotary switchRotary switch

SW14

Connection

No.

setting

SW5

Voltage

Selection

SW11

1st digit

address

setting

SW12

2st digit

address

setting

Pole

(High ceiling)
(Standard)
(Silent)

3
2
1

Not used

3 way
4 way

Option

Standard

Option

Standard

1~3

3

SWB

3 way
4 way

2.7m

2.4m

3.0m

2.7m

3.3m

3.0m

2

2

Operation by switch

✽ Ceiling height can be changed depending
on SWB setting.

Address setting should be done when network
remote controller (PAR-F25MA) is being used.

When attaching the optional high performance
filter elements (filter casement) to the unit, be
sure to attach it to the option side in order
to prevent the air flow reducing.

This is the switch to be used when the indoor
unit is operated with R2, R3, 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.

Remarks

<At delivery>

Address board

<At delivery>

Address board

<At delivery>

Address board

Address can be set while the
unit is stopped.

Address board

<At delivery>

Address board

<At delivery>

Address board

3
2
1

2
3
4

SW1210SW11

1

SW12 SW11

SW14

SW14

<At delivery>

220V 240V

SWA

123

16

8

DISASSEMBLY PROCEDURE

OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS

1. Removing the air intake grille

(1) Press the button.
(2) Open the intake grille 90°.
(3) Remove the clip.
(4) Slide the shaft in the hinge to the left and remove the

intake grille.

PUSH

4. Removing the fan motor

(1) Remove the fan guard.
(2) Remove the turbo-fan nut and radiator aluminum cap.
(3) Pull out the turbo fan.
(4) Disconnect the connector of the fan motor lead wire.
(5) Remove the 3nuts of fan motor.

3. Removing the electrical parts box

(1) Remove the fan grand.
(2) Disconnect the lead wire of the vane motor from the clamp,

and disconnect the red connector (8P).
(3) Remove 2 of 4 screws from the electrical parts cover.
(4) Remove the electrical parts cover.
(5) Disconnect the following connectors from the box.

Red (3P) for the fan motor
White (2P) for the indoor coil thermistor
Blue (2P) for the drain pump
White (4P) for the drain sensor

(6) Disconnect the green anti-falling wire of the electrical parts

box.
(7) Remove 3 of 4 screws from the electrical parts box, and

loosen the other screw.
(8) Pull out the electrical parts box.

Electrical parts inside the box

Terminal block

Transformer

Indoor fan capacitor

Room temperature thermistor

Indoor controller board

2. Removing the fan guard.

(1) Open the intake grille.
(2) Remove the 4 screws of the fan guard.

1. INDOOR UNIT

Be careful on removing heavy parts.

Photo 1

Photo 2

Photo 3

Figure 1

Photo 4

nut

Fan motorConnector

Fan guard screws

Lead wire for
vane motor

ConnectorTerminal blockAnti-falling wire

Radiator
aluminum cap

Capacitor

Nut

Screws

Box
cover

Clamp

Fan guard

Electrical box

Connector

Room
temperature
thermistor

Screws

Transformer

Indoor
controller
board

PLFY-P63VKM.UK

PUSH button

Shaft

Intake grille

17

OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS

5. Removing the room temperature thermistor

(1) Remove the fan guard.
(2) Remove the electrical box cover
(3) Remove the holder and the room temperature thermistor

by pulling the catch.

(4) Disconnect the red connector, CN20, on the indoor

controller board.

6. Removing the liquid pipe thermistor

(1) Remove the fan guard.
(2) Remove the electrical box cover.
(3) Remove the electrical box.
(4) Remove the turbo fan.
(5) Remove the screw of the service panel.
(6) Remove the service panel.
(7) Remove the liquid pipe thermistor(TH22) from the holder

attached to the copper pipe.

(8) Disconnect the 2-pin white connector.

7. Removing the panel

(1) Open the intake grille.
(2) Disconnect the connector the vane motor.
(3) Remove 4 screws of the panel.
(4) Pulling the temporary handing hook, remove the panel.

8. Removing the drain pan

(1) Remove the panel.
(2) Remove the fan guard.
(3) Remove the rubber bushing.
(4) Drain the remaining water in the drain pan.
(5) Remove the electrical box cover.
(6) Remove the electrical box.
(7) Remove the screw of the V.A. cover, and remove the V.A.

cover.

(8) Remove each screw of the corner supports 1,2, and 3,

and remove the corner supports 1,2 and 3.

(9) Pull out the drain pan.

wPull the left and right of the pan gradually.

Be careful not to crack or damage the pan.

Photo 8

Photo 7

Photo 6

Photo 5

Indoor controller board

Room
temperature
thermistor

Mounting hole

Corner
support 1

Corner
support 3

VA cover

Rubber
bush

Corner
support 2

Screws

screws

screws

Panel

Fan guard

Temporary hanging hook

Temporary hanging hook

Liquid pipe thermistor(TH22)

18

OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS

9. Removing the drain pump and drain sensor

(1) Remove the panel.
(2) Remove the fan guard.
(3) Remove the electrical parts cover.
(4) Remove the electrical parts box.
(5) Remove the drain pan.
(6) Remove 4 screws of the drain pump.
(7) Pulling the clip of the drain hose, pull out the drain hose

from the drain pump.
(8) Remove the drain sensor and the holder.
(9) Pull out the drain pump.

11. Removing the heat exchanger

(1) Remove the panel.
(2) Remove the fan guard.
(3) Remove the electrical parts cover.
(4) Remove the electrical parts box.
(5) Remove the drain pan.
(6) Remove the turbo fan.
(7) Remove the screw of the coil support A.
(8) Remove 2 screws of the coil support B.
(9) Remove 2 screws of the coil.

(10) Remove 4 screws of the piping cover of the outer wall,

and pull out the piping cover.

Photo 9

Drain hose

Drain pump

Drain sensor
holder

Screw

Clip

Photo 10

Photo 11

Heat exchanger

Coil support B

Coil support A

Coil screw

Screws of piping
cover

Piping

cover

Gas pipe thermistor(TH23)

10. Removing the gas pipe thermistor

(1) Remove the panel.
(2) Remove the fan guard.
(3) Remove the electrical parts cover.
(4) Remove the electrical parts box.
(5) Remove the drain pan.
(6) Remove the turbo fan.
(7) Remove the gas pipe thermistor(TH23) from the holder

attached to the copper pipe.
(8) Disconnect the 4-pin connector.

19

PARTS LIST

9

1
2
3
4
5
6
7

S70 29H 003
S70 29H 500
S70 29H 691
S70 29H 061
S70 29H 098
S70 B00 713
S70 A00 305

1
1
1
2
1
1
1

R.B

AIR OUTLET GRILLE
AIR FILTER
INTAKE GRILLE
HINGE
GRILLE HANGER
REMOTE CONTROLLER
REMOTE CONTROLLER CABLE

10m

No. Part No. Part Name Specification

Q'ty/set

Price

Unit

Amount

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

PLFY-P32/P40/

P50/P63

VKM.UK

PANEL PARTS
PLFY-P32VKM.UK
PLFY-P40VKM.UK
PLFY-P50VKM.UK
PLFY-P63VKM.UK

7

6

20

10

11

12

35

19

28

2931

32

39

30

24

27

26

25

15

14

7

6

3

4

33

8

9

5

1

2

34

23

22

13

36

38

37

16

21

17

18

20

21

FUNCTIONAL PARTS
PLFY-P32VKM.UK
PLFY-P40VKM.UK
PLFY-P50VKM.UK
PLFY-P63VKM.UK

Part No. Part Name Specification

No.

1

S70 002 687

2

S70 101 130

3

S70 100 130

4

S70 101 130

5

S70 100 130

6

S70 E00 762

7

S70 001 133

8

S70 001 659

9

S70 41N 114
S70 12B 202

10

11

S70 29H 523

12

S70 55K 355

13

S70 001 266
S70 12B 480

14

S70 14B 480
S70 15B 480

15

S70 A00 529

16

S70 001 660

17

S70 002 660

18

S70 003 660

19

S70 004 660

20

S70 001 657

21

S70 001 099

22

S70 521 716

23

S70 B02 716

24

S70 29H 255

25

S70 001 656
S70 030 310
S70 040 310

26

S70 050 310
S70 060 310
S70 001 239

27

S70 B02 799

28

S70 050 202

29

S70 003 501

30

S70 002 502

31

S70 A00 675

32

S70 001 097

33

S70 A48 524

34

S70 006 533

35

S70 060 202

36

S70 12A 401

37

S70 B02 304

38

S70 05B 294

39

BASE
LEG
LEG
LEG
LEG
FAN MOTOR
MOTOR MOUNT
INNER COVER
TURBO FAN
LIQUID PIPE THERMISTOR
DRAIN SOCKET
DRAIN PUMP
DRAIN SENSOR
HEAT EXCHANGER
HEAT EXCHANGER
HEAT EXCHANGER
DRAIN PAN
CORNER SUPPORT(1)
CORNER SUPPORT(2)
CORNER SUPPORT(3)
CORNER SUPPORT(4)
VA COVER ASSY
PANEL HOOKS
POWER SUPPLY TERMINAL BLOCK
TRANSMISSION TERMINAL BLOCK
FAN MOTOR CAPACITOR
B.BOX PLATE ASSY
INDOOR CONTROLLER BOARD
INDOOR CONTROLLER BOARD
INDOOR CONTROLLER BOARD
INDOOR CONTROLLER BOARD
FUSE
TRANSFORMER
ROOM TEMPERATURE THERMISTOR
ELECTRICAL PARTS COVER
BELL MOUTH
FAN GUARD
NUT/WASHER/CAP
DRAIN PLUG
SENSOR HOLDER
GAS PIPE THERMISTOR
LINEAR EXPANSION VALVE
ADDRESS CABLE
ADDRESS BOARD

PAI-V30F

(L, N, GND)
(M1, M2, S)

2.5µF 400V

250V 6.3A

Q'ty/set Price

PLFY-P·VKM.UK

P32 P40 P50

1

1
1
1
1
1
1
3
1
1
1
1
1
1
1

1
1
1
1
1
1
2
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

3

3

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

2

2

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

Remarks

(Drawing No.)

P63

1
1
1
1
1
1
3
1
1
1
1
1
1

1
1
1
1
1
1
1

(PART OF GRILLE)

2
1
1
1
1

1

(PART OF THE BOARD)

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

Wiring

Diagram

Symbol

MF

TH22

DP
DS

TB2
TB5

C

I.B
I.B
I.B
I.B

FUSE

T

TH21

TH23

LEV

A.B

Recom-

mended

Q'ty

Unit

Amount

21

22

1
2
3
4
5
6
7
8
9

S70 29H 002
S70 29H 085
S70 29H 223
S70 29H 063
S70 31H 063
S70 29H 056
S70 29H 040
S70 29H 041
S70 29H 049

4
1
1
1
1
1
1
1
1

MV

<3/SET>

AUTO VANE
AIR GUIDE
VANE MOTOR
SPRING JOINT 1
SPRING JOINT 2
PUSH BUTTON
GRILLE GEAR RIGHT
GRILLE GEAR LEFT
LID (UP)

No. Part No. Part Name Specification

Q'ty/set

Price

Unit

Amount

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom­mended

Q'ty

PLFY-P32/P40
/P50/P63

VKM.UK

PANEL PARTS
PLFY-P32VKM.UK
PLFY-P40VKM.UK
PLFY-P50VKM.UK
PLFY-P63VKM.UK

HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100-8310 TELEX J24532 CABLE MELCO TOKYO

cCopyright 1999 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Issued in Dec. 1999. No. OC204 300
Issued in Dec. 1999. No. OC204 242
Printed in Japan

New publication, effective Dec. 1999
Specifications subject to change without notice

TM