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

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

No. OC213

No. OC213

Series PLFY

Indoor unit
[Model names] [Service Ref.]

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

Ceiling Cassettes

INDOOR UNIT

R407C

CONTENTS

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

2. PART NAMES AND FUNCTIONS·········5

3. SPECIFICATION ···································7

4. 4-WAY AIR FLOW SYSTEM·················8

5. OUTLINES AND DIMENSIONS··········12

6. WIRING DIAGRAM ·····························13

7.

REFRIGERANT SYSTEM DIAGRAM

8. TROUBLE SHOOTING ·······················15

9. DISASSEMBLY PROCEDURE ···········20

10. PARTS LIST ········································23

11. OPTIONAL PARTS ·····························26

R22

····14

1

SAFETY PRECAUTION

Cautions for devices that use R407C refrigerant.

· Do not use the existing refrigerant piping.

-The old refrigerant and lubricating oil in the existing piping contains a large amount of chlorine which may cause the lubricating
oil 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 lubricating oil 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 Suniso 4GS or 3GS (small amount) as the lubricating oil to coat flares and flange connection parts.

-The lubricating oil used with the air conditioner is highly hygroscopic. If it is used, water may be mixed in and deterioration

of the lubricating oil may result.

· Use liquid refrigerant to charge the system.

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

mance 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 lubricating 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 lubricating oil to deteriorate.

3

[1] Service tools

Gravimeter

Unit

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

No. Tool name Specifications

1 Gauge manifold ·Only for R407C.

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

·Use high-tension side pressure of 35kgf/cm

2 Charge hose ·Only for R407C.

·Use pressure performance of 52kgf/cm2or 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 all the refrigerant in the unit, work may be started.

·Do not release the refrigerant in the air.

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

2

or over.

[3] Refrigerant recharging

(1) Refrigerant recharging process

Direct charging from the cylinder.

·Confirm that the cylinder is suitable for syphoning.

·Raise the cylinder and recharge the unit by syphoning liquid refrigerant.

(2) Recharge when refrigerant leakage has occurred.

·After recovering all the refrigerant in the unit, work may be started.

·Do not release the refrigerant in the air.

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

4

2

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

OPERATION SWITCH button

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

TEMPERATURE 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 switches the horizontal fan motion
ON and OFF.

(This button does not operate on this
model)

LOUVER button

This adjusts the vertical angle of the
ventilation.

AIR DIRECTION button

This resets the filter service indication
display

FILTER button

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

TIME SETTING button

This sets the ventilation fan speed.

AIR SPEED button

PART NAMES AND FUNCTIONS

● Indoor (Main) Unit

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

Filter
Removes dust and pollutants
from intake air

Grille

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

● Remote controller

● Operation buttons

Air Intake
Intakes air from room.

[PAR-F25MA]

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

5

● Display

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 dis
played from the time the heating
operation starts until 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 setting
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.

FAN SPEED display

The selected fan speed is displayed.

Operation lamp

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

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.

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 TEMPERATURE 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 needs
to be cleaned.

6

3

Item

V

·Hz

kcal/h

BTU/h

kW

kcal/h

BTU/h

kW
kW
kW

A

A
%
%

mm
mm
mm

k/min

Pa

kW

[mm
[mm
[mm

dB

kg

Cooling capacity

Power

Heat exchanger

Insulator

Air filter

Fan ✕ No

Air flow #3

Pipe

dimensions

Drain pipe size

Noise level

Exterior

(munsell symbol)

Fan motor

output

External

static pressure

Liquid

side

Gas
side

Heating capacity

F
a
n

Dimensions

<Grille>

Height

Width

Depth

Electric characteristic

Power

supply

input

Cooling
Heating
Cooling
Heating
Cooling
Heating

Rated

current

Power

factor

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

Single phase 220V-240V 50 Hz

8,000

31,800

9.3

9,000

35,800

10.5

0.18

0.18

0.86

0.86
95 - 87
95 - 87

10,000
39,600

11.6
11,200
44,500

13.0

0.30

0.30

1.43

1.43
95 - 87
95 - 87

12,500

49.700

14.5
14,000
55,600

16.3

0.34

0.34

1.64

1.64

94 - 86
94 - 86

30-28-25-22

43-41-38-35

30<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

28-26-23-20

0

Polyethylene sheet

PP honey comb fabric (long life)

O.D.32 (PVC pipe O.D.32 connectable)

41-39-36-33

30<5>

258<30>

22-20-18-16

0.070

15.88(5/8")

9.52(3/8")

37-35-32-30

24<5>

298<30>

0.120

19.05(3/4")

9.52(3/8")

Product weight

<Grille>

SPECIFICATION

3-1. Specification

Note 1. Rating conditions(JIS B 8615)

Note 2. The number indicated in < > is just for the grille.
Note 3. Air flow and the noise level are indicated as High-Middium 1-Middium 2-Low.

Cooling : Indoor : D.B. 27°C W.B. 19.5°C
Heating : Indoor : D.B. 21°C

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

7

3-2. Electrical parts specifications

Parts name

Model

Symbol

TH21

TH22

TH23

FUSE

MF

C1

MV

DP

DS

LEV

H2

TB2

TB5

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"

250V 6.3A

240V 21.8W

(L, N, ;) 330V 30A

(M1, M2, S) 250V 30A

Liquid pipe thermistor

Gas pipe thermistor

Fan motor capacitor

Vane motor

Drain-up mechanism

Drain sensor

Linear expansion valve

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

Room temperature
thermistor

Fuse
(Indoor controller board)

Fan motor
(with inner-thermostat)

Inner-thermostat
(Fan motor)

Electric heater
(Condensation proof)

Power supply terminal
block

Transmission terminal
block

6-pole OUTPUT 120W

D176P120MS

6-pole OUTPUT 70W

D17B6P70MS

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

Discharge direction

pattern

4-direction<Table 1> 3-direction 2-direction Note :

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 outlets

fully closed

4

4-1. Placement of the air outlets

For this grille, the discharge 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 the Table below according to the location in which you want to install the unit.

1) Decide on the pattern of the airflow direction.

4-WAY AIR FLOW SYSTEM

8

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.UK

PLFY-P100VAM.UK
PLFY-P125VAM.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 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 etc.

5

Green

Yellow

Orange

Connector (5P)

Package side

Multiple remote
controller adapter
PAC-SA88HA-E

Be sure to secure insulation
material by tape etc.

Installation at site

CN51
on
indoor unit
board

Red

Brown

1

MB

~

CN51

(SWA, SWB) on the indoor board to the appropriate setting.
Correspondence of ceiling heights to numbers of air outlets.

4-2. Fresh air intake (Location for installation)

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 add 135mm 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

Whenever the indoor unit is operating, the duct fun also

(1)Connect the optional multiple remote controller

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

(w)Use a relay under 1W.

duct fan (Booster fan)

operates.

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

between the Yellow and Orange connector lines.

MB: Electromagnetic switch power relay for duct fan.

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

9

4-4. Fixing of horizontal vane

Standard of

horizontal position
Dimension A (mm)

26 29 33 37

Level 30°

(Min.)

Downward 45° Downward 55°

Downward 70°

(Max.)

w Dimension between 26mm and 37mm can be arbitrarily set.

Caution

Do not set the dimension out of the range.
It could cause dew drips and stains on the ceiling, etc. and the unit may be damaged.

<Set range>

The horizontal vane of each air outlet can be fixed according to the environment, in which it is installed.

Setting procedure

1) Turn off the main power supply (Turn off the breaker).

2) Disconnect the vane motor connector of the direction of the arrow by pressing the unlocking button as shown in the figure
below.
Electrically insulate the disconnected connector with vinyl tape.

Vane motor

Vane motor

Horizontal vane

3)The vane angle can be fixed by turning the vane by hand.

The vane should remain within the angles shown in the table below.

Measured standard
position of the grille

Horizontal vane

Connector

Unlocking button

10

]

4-5. Fresh air intake amount & static pressure characteristics

Q

0

B

A

C

1

Curve in the
left graphs.

Duct characteristics
at site

Q

A

EC

2

Q

Qa

AD

3

(1) PLFY-P80VAM.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

1 intake

Air flow [m

2 intakes

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

Air flow [m

2 intakes

3

/min]

intake duct system with air flow

-50

-100

0

1 2 3 4 5 6

Air flow [m

3

/min]

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

-150

-200

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>

(2) PLFY-P100VAM.UK

PLFY-P125VAM.UK

Multifunction casement + Standard filter Multifunction casement + High efficiency filter

<m

3

/min>

<Pa>

<Pa>
<Pa>

<Pa>

Static pressure [Pa]

50

0

-50

-100

-150

-200

1 2 3 4 5 6 7 8 9

2 intakes

1 intake

Static pressure [Pa]

Air flow

3

[m

/min

-50

-100

-150

-200

50

0

1 2 3 4 5 6 7 8 9

1 intake

Air flow

3

/min]

[m

2 intakes

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

11

5

Air outlet hole

Vane motor

Auto vane

Emergency drain hole
(Combined with hole
fed chemicals)

Drain hole
(Combined with drain
pump cleaning hole)

Grille

Drain pipe
VP-25connection
(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

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.UK

Models

12

PLFY-P100VAM.UK
PLFY-P125VAM.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

17

+5

0

OUTLINES AND DIMENSIONS

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

Unit : mm

12

6

}

PE

BLU

BRN

ORN

YLW

RED

WHT

M2
S

TO OUTDOOR UNIT

BC CONTROLLER
REMOTE CONTROLLER
DC24-30V

M1

TB5

(SHIELD)

BLU

RED

BRN

BRN

WHT

BLK

WHT

BLK

YLW

YLW

YLW

YLW

RED

WHT

BLK

FAN

(WHT)

POWER

CND

(RED)

POWER

CNDK
(RED)

D.U.M

CNP

(BLU)

CN2D

(WHT)

BLU

BLU

CN2M
(BLU)

M-NET

CN41

(WHT)

HA

1

314

(WHT)
REMOTE
SWITCH

CN32

(WHT)

LEV

CN60

511

5

(GRN)

REMOTE

INDICATION

CN52

(WHT)

CENTRALLY

CONTROL

CN51

(RED)

ADDRESS

CN81

(GRN)

VANE
CN6V

(RED)

ADDRESS

CN42

12

HUMIDIFIER
CN25
(WHT)

A.B

SW5

240V220V

SWA

3
2
1

SWB

2
3
4

1

2

3

4

(RED)

ADDRESS

CN43

(RED)

ADDRESS

CN82

1

2

3

4

5

6

7

8

CONNECTION

No.

SW14

0

SWC

SW1

87654321

OFF

ON

109

00

SW11

SW12

1ST.DIGIT2ND.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

ZNR

FUSE

4

I.B

P.B

8

5

5

5555

TH21

SW2

See fig. w1

10

LEV

TH22

TH23

32

SW4

1

1

ON

OFF

ON
OFF

12345678923456

SW3

45

32167489

10

5

H2

GRILLE

MV MV MV MV

1

53

X4

87 23456123456

F.C

1

1

2

3

65 123421

BLK

BLK

BLK

BLK

BLK

BLK

DS

12

MF

1432

13 13

64523

DP

21

C

321

321

2131

(AC220-240V)
CNSK (RED)

(DC13.1V)

CN2S (WHT)

TRANS

2
1

122112

(WHT)

DRAIN

CN31

(BLK)

GAS

CN29

(WHT)
LIQUID
CN21

(RED)

INTAKE

CN20

123

1

1
2

LED1

LED2

X1X1X4

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

SW2MODELS

P80VAM.UK

P100VAM.UK

P125VAM.UK

(Fig. w1)

WIRING DIAGRAM

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

[LEGEND]

P.B
I.B

CN25
CN32
CN41
CN51
CN52
SW2
SW3
SW4
ZNR
FUSE
F.C
X1
X4
LED1
LED2

INDOOR POWER BOARD
INDOOR CONTROLLER BOARD
CONNECTOR

SWITCH

VARISTOR
FUSE (6.3A/250V)
FAN PHASE CONTROL
AUX.RELAY

POWER SUPPLY(I.B)
POWER SUPPLY(I.B)

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

DRAIN PUMP
FAN MOTOR

SYMBOL
C
MF
MV
DP
DS
H2
TB2
TB5
TH21

TH22

TH23

CAPACITOR(FAN MOTOR)
FAN MOTOR(WITH INNER THERMO)
VANE MOTOR
DRAIN WATER LIFTING-UP MACH
DRAIN SENSOR
DEW PREVENTION HEATER
TERMINAL
BLOCK
THERMISTOR

NAME SYMBOLNAMESYMBOL

POWER SUPPLY
TRANSMISSION
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’ )

LEV
A.B

LINEAR EXPANSION VALVE
CIRCUIT BOARD

SW1

SWITCH
SW5
SW11
SW12
SW14
SWA
SWB

SWC

NAME

MODE SELECTION
VOLTAGE SELECTION
ADDRESS SETTING 1ST DIGIT
ADDRESS SETTING 2ND DIGIT
CONNECTION No.
CEILING HEIGHT SELECTOR
DISCHARGE OUTLET NUMBER
SELECTOR
OPTION SELECTOR

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 in the capacity for the detail, see the fig. w1.

5.Please set the switch SW5 according to the power supply voltage.
Set SW5 to 240V side when the power supply is 230 and 240 volts.
When the power supply is 220 volts,set SW5 to 220V side.

13

7 REFRIGERANT SYSTEM DIAGRAM

Strainer (#50mesh)

Strainer (#100mesh)

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

Heat exchanger

Room temparature 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.UK

[15.88<5/8F>

[9.52<3/8F>

[19.05<3/4F>

[9.52<3/8F>

Item

Service Ref.

PLFY-P100VAM.UK
PLFY-P125VAM.UK

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

Refrigeration pipe size (Flare connection size)

14

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 detail. (Surrounding temperature 20:)

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

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

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

Vane motor

Linear expansion
valve

Drain pump

Drain sensor

(Refer to the thermistor)

(Refer to the thermistor)

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"

(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

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.
(Surrounding temperature 20:)

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-P·VAM

TROUBLE SHOOTING

8-1. How to check the parts PLFY-P•VAM.UK

15

<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=15exp { 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

M

5

4

6

2

3

Orange

Blue
Brown

Yellow

[4
[3
[2
[1

5
1
3
4

6

Brown
Red
Blue
Orange
Yellow
White

Connector(CN60)

16

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 lock and vibrate.

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

will be send till it goes to

A point in order to define the valve posi-

tion.

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 the normal situation.

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

handle while touching the screw driver point / tip 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.

A pulse signal will be sent out for 10 seconds as soon as the
main switch is turned on. If there are LEDS 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

17

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 therm 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 A, 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.

Setting in the left-shown.

Set for each capacity.

Indoor controller board

ON

OFF

12345

ON

OFF

MODELS

PLFY-

P80VAM.UK

PLFY-

P125VAM.UK

PLFY-

P100VAM.UK

SW 2 MODELS SW 2

123456

ON

OFF

123456

ON

OFF

123456

8-2. FUNCTION OF DIP SWITCH

18

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

2
3
4

SWB setting.

PLFY P80VAM.UK

SWA

SWB

4 direction

4

3 direction

3

2 direction

2

PLFY P100VAM.UK
PLFY P125VAM.UK

SWA

SWB

4 direction

4

3 direction

3

2 direction

2

1

Standard

2.7m

3.0m

3.3m

1

Standard

3.2m

3.6m

4.0m

23

High

ceiling1

3.0m

3.3m

3.5m

High

ceiling2

3.5m

3.5m
—

23

High

ceiling1

3.6m

4.0m

4.2m

High

ceiling2

4.2m

4.2m
—

Address board

<At delivery>

3
2
1

Address board

<At delivery>

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

A

0

1

9

2

8

3

7

4

6

5

1

0

1

2

3

4

5

6

7

8

9

220V 240V

Address setting should be done when network
remote controller (PAR-F25MA) 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

19

9

DISASSEMBLY PROCEDURE

PLFY-P80VAM.UK

OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS

1. Removing the air intake grille

(1) Slide the knob of air intake grille toward the arrow 1 to

open the air intake grille.
(2) Remove drop prevention hook from the panel.
(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 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

other 2 screws (fix to the oval hole which has a 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) from 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 of the electrical box and loosen the

other 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)

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

Terminal

block

Connector

20

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 each 2-pin white(liquid) and black(gas) con-

nector.

Photo 4

Photo 5

Pipe temperature
detection / gas
thermistor

Nut

Pipe temperature
detection / liquid
thermistor

Service access

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 corner screw.
(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 loosen another

2 screws, which fix to the oval holes, have different diame­ters.

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

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

Screws

Photo 7

Screw

Drain pan

Screw

Screw

Corner
panel

Panel

Screws

Panel

Screw

Screw

21

Lead
wire
holder

Drain plug(Larger)

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

22

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-F25MA>

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)
SCREW ASSY
REMOTE CONTROLLER

No. Part No. Part Name

Specification

Q'ty/set

Price

Unit

Amount

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom­mended

Q'ty

PLFY-

P80 / P100 / P125

VAM.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 E01 673

—

PARTS LIST

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

1

10

9

2

8

3

7

4

5

6

12

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

23

1

2

3

4
5
6

7

8

9

10

11

12

13
14
15

1
1

1

2
1
1
1

4
1

1

1
1

1
1
1

1

1

1
2
1
1

1
4

1

1
1

1
1
1
1

MF
MF

TH22
TH23

LEV

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

No. Part No. Part Name

Specification

Q'ty/set

Price

Unit

Amount

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

PLFY- · VAM.UK

P80

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

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

1

3

78

6

10

11

12

4

2

4

9

5

13
14

15

24

FUNCTIONAL PARTS

1
2

3
4
5
6
7

8

9
10
11
12
13
14

15
16

17
18
19
20

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

TB2
TB5

C
C

A.B

<PART OF DRAIN PAN ASSY>

<PART OF PCB>

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

250V 6.3A

1050XAP

3P(L,N,

;)

3P(M1,M2,S)

3.5+ 440V

7.0+ 440V

No. Part No. Part Name

Specification

Q'ty/set

Price

Unit

Amount

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

PLFY- · VAM.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 E00 503
S70 521 716
S70 B02 716
S70 17T 255
S70 E02 255
S70 001 663
S70 A41 524
S70 A48 524
S70 B01 294
S70 E00 304

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

1

18

2

17

10

3

4

5
6

7

8

9

16
15

13

14

12

20

19

11

25

11

11-1. Multi function casement

11-2. Air outlet shutter plate (20sets, 2pcs / 1set)

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

OPTIONAL PARTS

Part No. PAC-SG03TM-E

Part No. PAC-SG06SP-E

Part No. PAC-SG01KF

26

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

cCopyright 2000 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Issued in Aug. 2000. No. OC213 225
Printed in Japan

New publication, effective Aug. 2000
Specifications subject to change without notice