Mitsubishi PLFY-P80VAM-A.UK, PLFY-P100VAM-A.UK, PLFY-P125VAM-A.UK Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

No. OC260

Series PLFY

Indoor unit
[Model names] [Service Ref.]

PLFY-P80VAM-A PLFY-P80VAM-A.UK
PLFY-P100VAM-A PLFY-P100VAM-A.UK
PLFY-P125VAM-A PLFY-P125VAM-A.UK

INDOOR UNIT

Ceiling Cassettes

R407C

CONTENTS

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

2. PART NAMES AND FUNCTIONS······4

3. SPECIFICATION ·································6

4. 4-WAY AIR FLOW SYSTEM···············7

5. OUTLINES AND DIMENSIONS ·······10

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

7.

REFRIGERANT SYSTEM DIAGRAM

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

9. DISASSEMBLY PROCEDURE·········18

10. PARTS LIST ·····································21

11. OPTIONAL PARTS ···········Back cover

R22

·12

1

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 of
the new unit to deteriorate.

· 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 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 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 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 lubricant to deteriorate.

2

Gravimeter

Unit

[1] 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.

[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 it.
(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

2

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

Grille

Filter
Remove dust and pollutants
from return air

Horizontal Air Outlet
Sets airflow horizontal automatically
during cooling or dehumidifying.

Air Intake
Returns air from room.

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

● Remote controller

● Operation buttons

[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 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 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 oper­ation 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.

CHECK MODE

TEST RUN

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

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

3

Item

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

Cond. 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

PLFY-P80VAM-A.UK

PLFY-P100VAM-A.UK PLFY-P125VAM-A.UK

9.0

10.0

0.18

0.18

0.86

0.86

11.2

12.5

0.30

0.30

1.43

1.43

14.0

16.0

0.34

0.34

1.64

1.64

28-26-23-20

41-39-36-33

30<5>

22-20-18-16

37-35-32-30

24<5>

Unit : Galvanized sheets with gray heat insulation Grille : ABS resin Munsell<0.70Y 8.59/0.97>

840<950>
840<950>

Cross fin

Turbo fan ✕ 1

0

Polyethylene sheet

PP honey comb fabric

O.D.32 (PVC pipe VP-25 connectable)

258<30>

298<30>

30-28-25-22

43-41-38-35

30<5>

0.070

0.120

15.88(5/8")

9.52(3/8")

19.05(3/4")

9.52(3/8")

Single phase , 220-230-240V , 50Hz

[,V,Hz

SPECIFICATION

3-1. Specification

Note 1. Rating conditions(JIS B 8616)

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

outdoor : D.B. 35°C

Heating : Indoor : D.B. 20°C

outdoor : D.B. 7°C W.B. 6°C

6

3-2. Electrical parts specifications

Parts name

Model

Symbol

TH21

TH22

TH23

FUSE

MF

C

MV

DP

DS

LEV

H2

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

240V 21.8W

(L, N, ;) 330V 30A

(M1, M2, S) 250V 20A

(1, 2) 250V 10A

Liquid pipe thermistor

Gas pipe thermistor

Fan motor capacitor

Vane motor

Drain-up mechanism

Drain sensor

Linear expansion valve

PLFY-P80VAM-A.UK PLFY-P100VAM-A.UK PLFY-P125VAM-A.UK

Room temperature
thermistor

Fuse
(Indoor controller board)

Fan motor
(with inner-thermostat)

Electric heater
(Condensation proof)

Power supply terminal
block

Transmission terminal
block

MA remote controller
terminal block

6-pole OUTPUT 120W

D176P120MS

6-pole OUTPUT 70W

D17B6P70MS

Inner-thermostat

MSBPC20M04

DC12V 300

"

/phase

PLD-12230ME-1

INPUT 12/10.8W 24R/Hr

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 5.2" (0~2000pulse)

EDM-804ME

OFF 130: i 5:

ON 90: i 20:

3.5+ ✕ 440V 7.0+ ✕ 440V

Blowout direction

pattern

4-direction<Table 1> 3-direction 2-direction Note1.

For 3 and 2-directional,
please use the air outlet
shutter plate (option).

Pattern 1 Factory setting Pattern 4 One air outlet

fully closed

Pattern 6 Two air outlet

fully closed

4

4-1. Placement of the air outlets

• For this grille, the blowout direction comes in 11 patterns.
Also, by setting the dip switches (SWA and SWB) on the indoor board to the appropriate settings, you can adjust the air flow
and speed. Select the settings from Table according to the location in which you want to install the unit.

4-WAY AIR FLOW SYSTEM

1) Decide on the pattern of the airflow direction.

7

A.B

SW5

240V220V

SWA

3
2
1

SWB

2
3
4

1

2

3

4

(RED)

ADDRESS

CN43

(RED)

ADDRESS

CN82

1

Standard

2.7m

3.0m

3.3m

2

High ceiling 1

3.0m

3.3m

3.5m

3

High ceiling 2

3.5m

3.5m
—

1

2

3

4

5

6

7

8

CONNECTION

No.

SW14

0

SWC

SW1

87654321

OFF

ON

10

9

00

SW11

SW12

1ST.DIGIT2ND.DIGIT

3RD.DIGIT

4 direction
3 direction
2 direction

SWA

SWB

PLFY-P80VAM-A.UK

PLFY-P100 / P125VAM-A.UK

4
3
2

1



Standard

3.2m

3.6m

4.0m

2

High ceiling 1

3.6m

4.0m

4.2m

3

High ceiling 2

4.2m

4.2m
—

4 direction
3 direction
2 direction

SWA

SWB

4
3
2

2) According to the number of air outlets and height of the ceiling to install the unit, be sure to set the up switches

Fresh air intake hole

Fresh air intake hole diagram

3 - {2.8
Burring hole

{125
Burring hole pitch

{100
(Cut out hole)

Refrigerant pipe Drain pipe

Ceiling surface

120_

120_

w158

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

Installation at site

CN51
on
indoor unit
board

Red

Brown

1

~

CN51

MB

(SWA, SWB) on the indoor board to the appropriate setting.

• Correspondence of ceiling heights to numbers of air outlets.

4-2. Fresh air intake (Installation of site)

• At the time of installation, use the duct holes (cutout) located at the positions shown in following diagram, as and when required.
Note :

Be sure to add135mm to the dimensions in the diagram that are marked with a “w” if installing a multi function casement
(Option)

4-3. 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)

8

]

4-4. Fresh air intake amount & static pressure characteristics

Q

0

B

A

C

1

Curve in the
graphs.

Duct characteristics
at site

Q

A

EC

2

Q

Qa

AD

3

ll

PLFY-P80VAM-A.UK

Multifunction casement + Standard filter

Multifunction casement + High efficiency filter

Static pressure [Pa]

50

0

1 2 3 4 5 6

-50

-100

-150

-200

Taking air into the unit

Static pressure [Pa]

50

0

1 2 3 4 5 6

-50

-100

-150

-200

1 intake

Air flow [m

2 intakes

Air flow [m

3

/min]

3

/min]

Static pressure [Pa]

50

0

-50

-100

-150

-200

How to read curves

1 2 3 4 5 6

1 intake

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

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

E…Static pressure of indoor unit with air

flow amount Q

Qa…Estimated amount of fresh air

intake with out D <m3/min>

Air flow [m

2 intakes

3

/min]

<m

3

/min>

<Pa>

<Pa>
<Pa>

<Pa>

22

PLFY-P100 / P125VAM-A.UK

Multifunction casement + Standard filter Multifunction casement + High efficiency filter

Static pressure [Pa]

50

0

-50

-100

-150

-200

1 2 3 4 5 6 7 8 9

2 intakes

1 intake

Air flow

3

[m

/min

Static pressure [Pa]

50

0

-50

-100

-150

-200

1 2 3 4 5 6 7 8 9

1 intake

Taking air into the unit

Static pressure [Pa]

50

0

1 2 3 4 5 6 7 8 9

Air flow [m

3

/min]

-50

-100

-150

-200

Air flow

3

/min]

[m

2 intakes

9

5

Air outlet hole

Vane motor

Auto vane

Drain hole

Grille

Drain pipe
VP-25 connection
(O.D.{32)

Branch duct hole
(Cut out hole)

Ceiling surface

Suspension bolt pitch

Ceiling hole

Branch
duct hole

Suspension bolt pitch

Ceiling hole

Air outlet hole

Air intake hole

411

Air intake hole

Air intake grille

High efficiency filter
& Fresh air intake casement (option)

Power line entry

Suspension bolt lower edge

Suspension bolt M10
or W3/8

Control wire entry

Feeding hole
(Drain pump)

577

374286

840

197 159

60

17

+5

0

17

+5

0

135

30

190

159

605

159192

170

140

50~70

98

89

C

840

860~91020~45 20~45

20~4520~45

Fresh air intake

Branch duct hole

860~910

810

159

16

105

A

B

77 51

M

M

M

1

2

M

950

51 77

950

577

411

Terminal block

Detail drawing of fresh air intake

{175

{150

14 - {2.8
Burring hole

3 - {2.8
Burring hole

{100
(Cut out hole)

{125

Ceiling surface

PLFY-P80VAM-A.UK

Models 12

PLFY-P100VAM-A.UK
PLFY-P125VAM-A.UK

Refrigerant pipe

(9.52mm dia.)

flared connection

3/8F

Refrigerant pipe

(9.52mm dia.)

flared connection

3/8F

Refrigerant pipe

(15.88mm dia.)

flared connection

5/8F

241

281

A

258

298

B

80

84

C

Refrigerant pipe

(19.05mm dia.)

flared connection

3/4F

350

120_

120_

158

90

70_

100 100 90

100

130

155

167

OUTLINES AND DIMENSIONS

PLFY-P80VAM-A.UK
PLFY-P100VAM-A.UK
PLFY-P125VAM-A.UK

Unit : mm

10

6

PLFY-P80VAM-A.UK
PLFY-P100VAM-A.UK
PLFY-P125VAM-A.UK

WIRING DIAGRAM

11

7 REFRIGERANT SYSTEM DIAGRAM

Strainer (#50mesh)

Strainer (#100mesh)

Strainer1 (#50mesh)
Strainer2 (#100mesh)

Heat exchanger

Room temperature thermistor TH21

Gas pipe thermistor TH23

Liquid pipe thermistor TH22

Linear expansion valve

Gas pipe

Liquid pipe

Flare connection

Gas pipe

Liquid pipe

PLFY-P80VAM-A.UK

[15.88(5/8'')

[9.52(3/8'')

PLFY-P100 / P125VAM-A.UK

[19.05(3/4'')

[9.52(3/8'')

Item

Service Ref.

PLFY-P80VAM-A.UK
PLFY-P100VAM-A.UK
PLFY-P125VAM-A.UK

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:~30:)

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

Vane motor

Linear expansion
valve

Drain pump

Drain sensor

(Refer to the next page for a detail.)

(Refer to the next page for a detail.)

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

1
2

Yellow

Yellow

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-Brown

(3)-(5)

Orange-Red

(4)-(6)

Blue-Brown

NormalConnector Abnormal

300" Open or short

Normal Abnormal

290" Open or short

Orange

Red

White

Blue

Brown

Yellow

3

6

1

5

4

2

M

Orange

Red

White

Red — Yellow
Red — Blue
Red — Orange
Red — White

Blue

Yellow

35

1

2

4

Measure the resistance between the terminals using a tester.

Fan motor

1

1

2

2

3

3

Red

White

Black

Relay connector

Protector

P80

87.2"

104.1"

Abnormal

Open or short

P100, P125

28.7"

41.6"

Red-Black

White-Black

Motor terminal

or

Relay connector

Normal

PLFY- • VAM-A.UK

M

TROUBLE SHOOTING

8-1. How to check the parts PLFY-P80/P100/P125VAM-A.UK

13

<Thermistor Characteristic graph>

-200 20406080

< 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 thermistor(TH22)
Gas pipe temperature thermistor(TH23)

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

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 for
drain sensor

Thermistor R0=6.0k' ±5%
Fixed number of B=3390k' ±2%

< Thermistor for lower temperature >

50

40

30

20

Resistance (K")

10

0

-20 -10 0 10 20 30 40 50
Temperature (:)

Rt=6exp { 3390( ) }

1

273+t

1

273

0: 6.0k'
10: 3.9k'
20: 2.6k'
25: 2.2k'
30: 1.8k'
40: 1.3k'

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

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.

Linear expansion valve

1

Red

White

Blue

4

6

2
3

Orange

Brown

Yellow

M

5

[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 dri-

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

Trouble shooting

➂

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.

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

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.

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

Check points

6
5
4
3
2

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

1

15

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.

Switch Function Remarks

<At delivery>

ON

OFF

123456789

10

Address board

Operation by switch

ON OFF

Note :



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=ON, SW 1-8=ON
→ Indoor fan stop.

Pole

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

Filter clogging detection
Filter cleaning
Fresh air intake
Remote indication switching
Humidifier control

Air flow set in case of
Heat thermostat OFF

Auto restart function
Power 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

9(5)degrees

15degrees

Heat pump / Cooling only

Louver / humidifier w6

Vane

Vane swing function

Vane horizontal angle

Vane cooling limit angle setting w4

Heat 4degrees up

Superheat setting temperature

w5

Sub cool setting temperature

Heat pump

Not available

Not available

Not available

First setting

Down B, C

Not effective

Effective

6(2)degrees

10degrees

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

Thermistor <intake temperature
detection> position

<At delivery>

ON

OFF

123456789

10

Indoor controller board

Note :



w4

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

w5

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



w6

SW3-2 setting

Only for PLFY-P·VAM, SW is

used to change whether the
humidifier functions or not.
(Fixed the louver function less.)

<At delivery>

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

ON

OFF

12345

ON

OFF

MODELS

PLFY-P80

VAM-A.UK

PLFY-P125

VAM-A.UK

PLFY-P100

VAM-A.UK

SW 2 MODELS SW 2

123456

ON

OFF

123456

ON

OFF

123456

ON

OFF

12345

8-2. FUNCTION OF DIP SWITCH

16

Switch

Pole

Operation by switch

Remarks

SWA

Ceiling

height

selector

SWB

Discharge

outlet
number
selector

SWC

Option

selector

(High ceiling2)

1~3

(High ceiling1)
(Standard)

3

2

direction)

(2
(3 direction)
(4 direction)

Option

Standard

✽ Ceiling height can be changed depends on

3
2
1

SWB setting.

PLFY P80VAM-A

SWA

SWB

4 direction

4

3 direction

3

2 direction

2

1

Standard

2.7m

3.0m

3.3m

23

High

ceiling1

3.0m

3.3m

3.5m

High

ceiling2

3.5m

3.5m
—

Address board

<At delivery>

3
2
1

Address board

<At delivery>

2
3
4

PLFY P100, P125VAM-A

SWB

4

4 direction

3

3 direction

2

2 direction

SWA

1

Standard

3.2m

3.6m

4.0m

23

High

ceiling1

3.6m

4.0m

4.2m

High

ceiling2

4.2m

4.2m
—

2
3
4

Address board

When attach the optional high performance

<At delivery>

filter elements (multi function casement) to
the unit, be sure to attach it to the option
side in order to prevent the airflow reducing.

Option

Standard

SW11
1st digit
address

setting

SW12

2nd digit

address

setting

SW14

Connection

No.

setting

SW5

Voltage

Selection

Rotary switchRotary switch

2

SW1210SW11

0

9

8

7

6

1

2

3

4

5

SW14

F

E

D

C

B

0

1

9

2

8

3

7

4

6

5

1

0

1

2

3

4

5

6

7

A

8

9

220V 240V

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 board

Address can be set while the
unit is stopped.

<At delivery>

SW12 SW11

0

9

8

7

6

0

1

4

5

1

9

2

3

2

8

3

7

4

6

5

Address board

<At delivery>

SW14

0

1

2

F

3

E

4

D

5

C

6

B

7

A

8

9

Address board

<At delivery>

220V 240V

17

9

DISASSEMBLY PROCEDURE

PLFY-P80VAM-A.UK

OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS

1. Removing the air intake grille

(1) Slide the knob of air intake grille to the direction of the

arrow 1 to open the air intake grille.

(2) Remove the string hook from the panel to pretend the grille

from dropping.

(3) Slide the shaft in the hinge to the direction of the arrow2

and remove the air intake grille.

2. Removing the fan guard

(1) Open the air intake grille.
(2) Remove the 3 screws of fan guard.

Be careful on removing heavy parts.

Figure 1

Air intake grille

Grille

Air intake grille knob

Photo 1

Screws

Fan guard

Air intake grille

3. Removing the room temperature thermistor

(1)Remove the fan guard.(See photo 1)
(2) Remove the screw(✕1) in the room temperature thermistor

holder to remove the holder and the room temperature
thermistor.

(3) Remove the 1 screw from the bell mouth, and unscrew the

another 2 screws (fixed to the oval hole which has different
diameter) to remove the bell mouth.

(4) Hold the holder claw, and remove the room temperature

thermistor and holder.

(5) Disconnect the connector (red) in the indoor control board.

4. Removing the electrical box

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

and disconnect the white connector (10P).
(3) Remove the room temperature thermistor with the holder.
(4) Remove the bell mouth.(See photo 2)
(5) Disconnect the relay connector in the electrical box.

Red (3P) for fan motor power supply

White (2P) for pipe temperature detection / liquid thermistor

Black (2P) for pipe temperature detection / gas thermistor

Blue (2P) for drain pump

White (3P) for drain sensor
(6) Remove the 3 screws from the electrical box, loosen

another 2 screws to remove the box.

<Electrical parts in the electrical box>

Indoor controller board

power supply board

Terminal block (Power supply)

Terminal block (Transmission)

Terminal block (MA remote controller)

Capacitor

Address board

Photo 2

Bell mouth

Photo 3

Electrical
box

Power
supply
board

Address
board

Connector

Turbo fan

Indoor controller board

Screws

Room
temperature
thermistor

Air intake grille

Nut

Capacitor

Terminal

block

Connector

18

OPERATING PROCEDURE

PHOTOS&ILLUSTRATIONS

5. Remove the fan motor

(1) Remove the fan guard.(See photo 1)
(2) Remove the bell mouth.(See photo 2)
(3) Remove the electrical box.(See photo 3)
(4) Remove the turbo fan nut, washer and radiation cap(P100, P125).
(5) Pull out the turbo fan.
(6) Disconnect the connector of the fan motor lead wire.
(7) Remove the 4 nuts of the fan motor.

6. Removing the pipe temperature detection / liquid thermistor
and the pipe temperature detection / gas thermistor

(1) Remove the fan guard.(See photo 1)
(2) Remove the bell mouth.(See photo 2)
(3) Remove the electrical box.(See photo 3)
(4) Remove the turbo fan.
(5) Remove the screw of the service panel.
(6) Remove the service panel.
(7) Remove the pipe temperature detection / liquid thermistor

and the pipe temperature detection / gas thermistor which
is inserted into the holder installed to the thin copper pipe.

(8) Disconnect the each 2-pin white(liquid) and black(gas)

connector.

Photo 4

Photo 5

Pipe temperature
detection / gas
thermistor

Service entrance

Nut

Pipe temperature
detection / liquid
thermistor

Fan motor

Nut

Connector

7. Removing the panel

(1) Remove the air intake grille.(See figure 1)

Corner panel (See figure 2)

(1) Remove the screw of the corner.
(2) Slide the corner panel to the direction of the arrow3, and

remove the corner panel.

Panel (See photo 6)

(1) Disconnect the connector that connects with the unit.
(2) Remove the 2 screws from the panel and loose another 2

screws, which fixed to the oval hole, have different diameter.

(3) Rotate the panel a little to remove the screws.(Slide the

panel so that the screw comes to a large diameter of the
oval hole, which has two different diameters.)

8. Removing the drain pan

(1) Remove the panel. (See photo 6)
(2) Remove the drain plug (Larger one), drain the remaining

water in the drain pan.
(3) Remove the corner cover. (2 screws)
(4) Remove the bell mouth (See photo 2)
(5) Remove the electrical box. (See photo 3)
(6) Remove the lead wire holder. (1 screw)
(7) Remove the 4 screws and pull out the drain pan.

w Pull out the left and right of the pan gradually.

Be careful not to crack or damage the pan.

Figure 2

Corner
panel

Photo 6

Connector

Screw

Photo 7

Screw

Drain pan

Screw

Screw

Corner
panel

Panel

Screw

Panel

Screw

Screw

19

Lead
wire
holder

Drain plug(Larger one)

Corner cover

OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS

9. Removing the drain pump and drain sensor

(1) Remove the panel. (See photo 6)
(2) Remove the fan guard. (See photo 1)
(3) Remove the bell mouth. (See photo 2)
(4) Remove the electrical box. (See photo 3)
(5) Remove the drain pan. (See photo 7)
(6) Remove the 3 screws of the drain pump.
(7) Cut the drain hose band, pull out the drain hose from the

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

10. Removing the heat exchanger

(1) Remove the panel. (See photo 6)
(2) Remove the fan guard. (See photo 1)
(3) Remove the bell mouth. (See photo 2)
(4) Remove the electrical box. (See photo 3)
(5) Remove the drain pan. (See photo 7)
(6) Remove the turbo fan. (See photo 4)
(7) Remove the 3 screws of the piping cover, and pull out

piping cover.
(8) Remove the 4 screws of the outer wall cover, and pull out

the outer wall cover.
(9) Remove the screw of the coil support.

(10) Remove the 2 screws of the coil.

(11) Pull out the heat exchanger.

Photo 8

Screw

Drain hose

Photo 9

Heat exchanger

Coil

support

Fixing band

Coil support

Drain sensor

Screw

Drain pump

Coil screws

Coil
support

Photo 10

Screw

Outer wall cover

Piping cover

Screws of
piping cover

20

10

1
2
3
4
5
6
7
8

9
10
11
12

1
4
1
3
1
1
4
8
4
4
1
1

<PAR-20MAA>

65WRC5

MV

R.B

AIR OUTLET GRILLE
VANE ASSY
CORNER PANEL
CORNER PANEL
L.L. FILTER
GRILLE ASSY
VANE MOTOR
VANE BUSH
GEAR (VANE)
GEAR (MOTOR)
MA-REMOTE CONTROLLER
SCREW ASSY

No. Part No. Part Name

Specification

Q'ty/set

Price

Unit

Amount

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

PLFY-

P80 / P100 / P125

VAM-A.UK

S70 E10 003
S70 E00 002
S70 E01 638
S70 E00 638
S70 E00 500
S70 E00 691
S70 E00 223
S70 E00 063
S70 E00 040
S70 E01 040
S70 030 713
S70 E01 673

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

PARTS LIST

PANEL PARTS
PLFY-P80VAM-A.UK
PLFY-P100VAM-A.UK
PLFY-P125VAM-A.UK

1

2

3

GEAR (MOTOR)

10

GEAR (VANE)

9

VANE BUSH

8

VANE MOTOR

7

4

5

6

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

21

11

1

2

3

4

5

6

7

8

9
10

11

12

13

14

15

1
2
1

1
1

1
1

1
1
1
1

1
1

4
1

1
2

1
1

1
1

1
1
1
1

1
1

1
4

1

LEV
TH23
TH22

MF
MF

BASE DWG
LEG
DRUM 1 ASSY
DRUM 1 ASSY
LEG
TURBO FAN
TURBO FAN
SPL WASHER
HEAT EXCHANGER
HEAT EXCHANGER
LINEAR EXPANSION VALVE
GAS PIPE THERMISTOR
LIQUID PIPE THERMISTOR
INNER COVER ASSY
INNER COVER ASSY
LEG
FAN MOTOR
FAN MOTOR
MOTOR MOUNT
DRUM 2 ASSY
DRUM 2 ASSY

No. Part No. Part Name

Specification

Q'ty/set

Price

Unit

Amount

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom­mended

Q'ty

PLFY- · VAM-A.UK

P80

P100/P125
S70 003 687
S70 E01 130
S70 005 688
S70 007 688
S70 E02 130
S70 E00 114
S70 E01 114
S70 08K 097
S70 E15 480
S70 E17 480
S70 E08 401
S70 79N 202
S70 17J 202
S70 E00 659
S70 E02 659
S70 E00 130
S70 E06 762
S70 E07 762
S70 A41 105
S70 006 688
S70 008 688

FUNCTIONAL PARTS
PLFY-P80VAM-A.UK
PLFY-P100VAM-A.UK
PLFY-P125VAM-A.UK

1

1415

13

12

SPL WASHER

2

3

2

11

4

5

6

7

10

9

8

22

FUNCTIONAL PARTS

1
2

3
4
5
6
7

8

9
10
11
12
13
14
15
16
17

18
19

20
21

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

DP
DS

P.B

FUSE

I.B
I.B
I.B

TH21

A.B

TB15

TB5
TB2

C
C

<PART OF DRAIN PUMP ASSY>

<PART OF BOARD>

DRAIN PAN
DRAIN PAN
DRAIN SOCKET
DRAIN PUMP
DRAIN SENSOR
SENSOR HOLDER
POWER BOARD
FUSE
INDOOR CONTROLLER BOARD
INDOOR CONTROLLER BOARD
INDOOR CONTROLLER BOARD
BELL MOUTH (CONT. COVER ASSY)
FAN GUARD
ROOM TEMPERATURE THERMISTOR
ADDRESS BOARD
ADDRESS CABLE
ELECTRICAL BOX COVER
MA-REMOTE CONTROLLER TERMINAL BLOCK
TRANSMISSION TERMINAL BLOCK
POWER SUPPLY TERMINAL BLOCK
FAN MOTOR CAPACITOR
FAN MOTOR CAPACITOR
CORNER COVER
DRAIN PLUG
DRAIN PLUG

250V 6.3A

1050XAP

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

;)

3.5+ 440V

7.0+ 440V

No. Part No. Part Name

Specification

Q'ty/set

Price

Unit

Amount

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom­mended

Q'ty

PLFY- · VAM-A.UK

P80

P100P125
S70 E02 529
S70 E00 529
S70 A41 523
S70 E01 355
S70 E00 266
S70 31K 241
S70 E02 313
S70 520 239
S70 E10 310
S70 E11 310
S70 E12 310
S70 003 503
S70 E10 675
S70 E00 202
S70 B02 294
S70 E00 304
S70 E00 503
S70 512 716
S70 B02 716
S70 521 716
S70 17T 255
S70 E02 255
S70 001 663
S70 A41 524
S70 A48 524

PLFY-P80VAM-A.UK
PLFY-P100VAM-A.UK
PLFY-P125VAM-A.UK

1

DRAIN PLUG

21

2

DRAIN PLUG

20

3

4

5
6

FUSE

7

8
9

10

23

19

FAN MOTOR

18

CAPACITOR
POWER SUPPLY

17

TERMINAL BLOCK
TRANSMISSION

16

TERMINAL BLOCK
MA-REMOTE

15

CONTROLLER
TERMINAL BLOCK

14
13

12
11

11

OPTIONAL PARTS

11-1. Multi function casement

Part No. PAC-SG03TM-E

11-2. Air outlet shutter plate (20 sets)

Part No. PAC-SG06SP-E

11-3. High efficiency filter (PAC-SG03TM-E is required in using this optional part.)

Part No. PAC-SG01KF

HEAD OFFICE : MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

cCopyright 2001 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Jul. 2001. No. OC260 250
Made in Japan

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