Mitsubishi PDFY-P20VM-A, PDFY-P25VM-A, PDFY-P32VM-A, PDFY-P40VM-A, PDFY-P50VM-A Service Manual

TECHNICAL & SERVICE MANUAL

Air-Conditioners For Building Application

<Indoor unit>

PDFY-P20VM-A,PDFY-P63VM-A
PDFY-P25VM-A,PDFY-P71VM-A
PDFY-P32VM-A,PDFY-P80VM-A
PDFY-P40VM-A,PDFY-P100VM-A
PDFY-P50VM-A,PDFY-P125VM-A

2001

Models

Ceiling Concealed Built-in

Series PDFY

CONTENTS

SAFETY PRECAUTIONS·························1

1. FEATURES············································3

2. PART NAMES AND FUNCTIONS········4

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

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

5.WIRING DIAGRAM ·····························10

6.

REFRIGERANT SYSTEM DIAGRAM

····12

7.TROUBLE SHOOTING························13

8. DISASSEMBLY PROCEDURE···········18

For use with the R407C & R22

1

- Inadequate connection and fastening may generate heat and
cause a fire.

• Prepare for typhoons and other strong winds and earthquakes
and install the unit at the specified place.

- Improper installation may cause the unit to topple and result in

injury.

• Always use an air cleaner , humidifier, electric heater, and other
accessories specified by Mitsubishi Electric.

- Ask an authorized technician to install the accessories. Improper

installation by the user may result in water leakage, electric shock,
or fire.

• Never repair the unit. If the air conditioner must be repaired,
consult the dealer.

- If the unit is repaired improperly, water leakage , electric shoc k, or

fire may result.

• Do not touch the heat exchanger fins.

- Improper handling may result in injury.

• If refrigerant gas leaks during installation work, ventilate the
room.

- If the refrigerant gas comes into contact with a flame, poisonous

gases will be released.

• Install the air conditioner according to this Installation Manual.

- If the unit is installed improperly, water leakage , electric shock, or

fire may result.

• Have all electric work done by a licensed electrician according
to “Electric Facility Engineering Standard” and “Interior Wire
Regulations”and the instructions given in this manual and al­ways use a special circuit.

- If the power source capacity is inadequate or electric work is per-

formed improperly, electric shoc k and fire may result.

• Securely install the cover of control box and the panel.

- If the cover and panel are not installed properly, dust or water

may enter the outdoor unit and fire or electric shock may result.

• When installing and moving the air conditioner to another site,
do not charge the it with a refrigerant different from the refrig­erant (R407C or R22) specified on the unit.

- If a different refrigerant or air is mixed with the original refrigerant,

the refrigerant cycle may malfunction and the unit may be dam­aged.

• If the air conditioner is installed in a small room, measures
must be taken to prevent the refrigerant concentration from
exceeding the safety limit even if the refrigerant should leak.

- Consult the dealer regarding the appropr iate measures to pre-

vent the safety limit from being exceeded. Should the refrigerant
leak and cause the safety limit to be exceeded, hazards due to
lack of oxygen in the room could result.

• When moving and reinstalling the air conditioner, consult the
dealer or an authorized technician.

- If the air conditioner is installed improperly, water leakage, elec-

tric shock, or fire may result.

• After completing installation work, make sure that refrigerant
gas is not leaking.

- If the refrigerant gas leaks and is exposed to a fan heater, stove,

oven, or other heat source, it may generate noxious gases.

• Do not reconstruct or change the settings of the protection
devices.

- If the pressure switch, thermal switch, or other protection device

is shorted and operated forcibly , or parts other than those specified
by Mitsubishi Electric are used, fire or explosion may result.

1. Before installation and electric work

s Before installing the unit, make sure you read all the

“Safety precautions”.

s The “Safety precautions” provide very important

points regarding safety. Make sure you follow them.

s This equipment may not be applicable to EN61000-3-

2: 1995 and EN61000-3-3: 1995.

s

s Please report to or take consent by the supply au-

thority before connection to the system.

Symbols used in the text

Warning:

Describes precautions that should be observed to prevent danger
of injury or death to the user.

Caution:

Describes precautions that should be observed to prevent damage
to the unit.

Symbols used in the illustrations

: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Indicates that caution should be taken with rotating parts. (This

symbol is displayed on the main unit label.) <Color: Yellow>

: Beware of electric shock (This symbol is displayed on the main

unit label.) <Color: Yellow>

Warning:

Carefully read the labels affixed to the main unit.

Warning:

• Ask the dealer or an authorized technician to install the air con­ditioner.

- Improper installation by the user may result in water leakage, elec-

tric shock, or fire.

• Install the air unit at a place that can withstand its weight.

- Inadequate strength may cause the unit to fall down, resulting in

injuries.

• Use the specified cables for wiring. Make the connections se­curely so that the outside force of the cable is not applied to the
terminals.

This equipment may have an adverse effect equip­ment on the same electrical supply system.

SAFETY PRECAUTIONS

2

2. Precautions for devices that use
R407C refrigerant

Caution:

• 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.

• Use refrigerant piping made of C1220 (CU-DHP) phosphorus
deoxidized copper as specified in the *JIS H3300 “Copper and
copper alloy seamless pipes and tubes”. In addition, be sure
that the inner and outer surfaces of the pipes are clean and
free of hazardous sulphur, oxides, dust/dirt, shaving particles,
oils, moisture, or any other contaminant.

- Contaminants on the inside of the refrigerant piping may cause

the refrigerant residual oil to deteriorate.

*JIS: Japanese Industrial Standard

• 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 ester oil, ether oil or alkylbenzene (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.

• Use liquid refrigerant to fill the system.

- If gas refr igerant 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 refrig-

erant may cause the refrigerator oil to deteriorate.

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

- The vacuum pump oil may flow bac k into the refrigerant cycle and

cause the refrigerator oil to deteriorate.

• Do not use the following tools that are used with con ventional
refrigerants.
(Gauge manifold, charge hose, 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 ma y deteriorate.

- Since R407C does not contain any chlorine, gas leak detectors

for conventional refrigerants will not react to it.

• Do not use a charging cylinder.

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

• Be especially careful when managing the tools.

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

may deteriorate.

3

PDFY-P20VM-A
PDFY-P25VM-A
PDFY-P32VM-A
PDFY-P40VM-A
PDFY-P50VM-A
PDFY-P63VM-A

PDFY-P80VM-A
PDFY-P100VM-A
PDFY-P125VM-A

2.2/ 2.5

2.8/ 3.2

3.6/ 4.0

4.5/ 5.0

5.6/ 6.3

7.1/ 8.0

8.0/ 9.0

9.0/ 10.0

11.2/ 12.5

14.0/ 16.0

PDFY-P71VM-A

Ceiling Concealed Built-in

Series PDFY

Models

Cooling capacity/Heating capacity

kW

FEATURES1

Indoor unit

4

●

● ● Remote

Indoor (Main) Unit

controller

● Operation buttons

[PAR-20MAA]

Once the controls are set, the same operation mode can

be repeated by simply pressing the ON/OFF button.

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

1

2

3

4 56879

0

C

A

B

1 [Room temperature adjustment] Button
2 [Timer/continuous] Button
3 [Selecting operation] Button
4 [Time selection] Button

[Time-setting] Button

5 [Louver] Button
6 [Fan speed adjustment] Button

7 [Up/down airflow direction] Button
8 [Ventilation] Button
9 [Checking/built-in] Button
0 [Test run] Button
A [Filter] Button
B [ON/OFF] Button
C Position of built-in room temperature

•Never expose the remote controller to direct sunlight. Doing so can result in the erroneous measure­ment of room temperature.

•Never place any obstacle around the lower right-hand section of the remote controller.Doing so can
result in the erroneous measurement of room temperature.

PART NAMES AND FUNCTIONS2

Air outlet

Air inlet

5

● Display

(A) Current time/Timer
(B) Centralized control
(C) Timer ON
(D) Abnormality occurs
(E) Operation mode: COOL, DRY, AUTO, FAN, HEAT
(F) Preparing for Heating mode
(G) Defrost mode
(H) Set temperature
(I) Power ON
(J) Louver
(K) Not available function
(L) Ventilation
(M) Function setting mode
(N) Test run mode
(O) Error check mode
(P) Filter sign
(Q) Set effective for 1 hr.
(R) Sensor position
(S) Room temperature
(T) Airflow
(U) Fan speed

ABCD

SQTU

E

F

STAND BY
DEFROST

G

CENTRALLY CONTROLLED

CHECK

˚C

ON OFF

CLOCK

ERROR CODE

TEMP.

HIKLJ

1Hr.

NOT AVAILABLE

˚C

ON/OFF

FILTER

CHECK MODE

TEST RUN
FUNCTION

R
P

O
N
M

6

3-1. Specification

0.078

220-240 /220

50 / 60

Galvanizing

295 335

Cross fin( Alminium plate fin and copper tube)

Single phase induction motor

Synthetic fiber unwoven cloth filter( long life)

ø9.52

VP-25

Power source

Model

PDFY-P20

VM-A

PDFY-P25

VM-A

PDFY-P32

VM-A

PDFY-P40

VM-A

PDFY-P50

VM-A

Item

Dimension

Fan

Motor

Refrigerant

pipe dimension

Power cons mption

Current

Cooling capacity
Heating capacity

External finish (Munsel No.)

Net weight

Heat exchanger

Air filter

Drain pipe dimension

Noise level

(Low-Middle2-Middle1-High)

Voltage

Frequency

Cooling
Heating
Cooling
Heating

Height

Width
Depth

Type

External static pressure

Type

Output

Gas(Flare)

Liquid(Flare)

~V

Hz
kW
kW
kW
kW

A
A

mm
mm
mm

kg

m3/min

Pa

kW

mm
mm

dB(A)

220-240 / 220

50 / 60

3.6

4.0

0.11/0.12

0.11/0.12

0.53/0.58

0.53/0.58

Galvanizing

295

735

27

Cross fin( Alminium plate fin and copper tube)

30/50/100

Single phase induction motor

Synthetic fiber unwoven cloth filter( long life)

VP-25

4.5

5.0

5.6

6.3

2.2

2.5

2.8

3.2

0.11/0.12

0.11/0.12

0.53/0.58

0.53/0.58

710

Note:1
Note:1

Note:1
Note:1

Note:2

25.5

0.075

Sirocco fanX1

6.0-6.5-7.5-8.5 10.0-11.0-12.5-14.0

Sirocco fanX2

32 34

960

Airflow rate

u

(Low-Middle2-Middle1-High)

Power source

Model

PDFY-P63

VM-A

PDFY-P80

VM-A

PDFY-P100

VM-A

PDFY-P125

VM-A

Item

Dimension

Fan

Motor

Refrigerant

pipe dimension

Power consumption

Current

Cooling capacity
Heating capacity

External finish (Munsel No.)

Net weight

Heat exchanger

Air filter

Drain pipe dimension

Noise level

(Low-Middle2-Middle1-High)

Voltage

Frequency

Cooling
Heating
Cooling
Heating

Height

Width
Depth

Type

External static pressure

Type

Output

Gas(Flare)

Liquid(Flare)

~V

Hz
kW

kW
kW

kW

A
A

mm
mm
mm

kg

m3/min

Pa

kW

mm
mm

dB(A)

11.2

12.5

0.27-0.31/0.29

0.27-0.31/0.29

1.28-1.34/1.36

1.28-1.34/1.36

0.33-0.38/0.39

0.33-0.38/0.39

1.55-1.63/1.84

1.55-1.63/1.84

14.0

16.0

7.1

8.0

0.14/0.17

0.14/0.17

0.68/0.82

0.68/0.82

9.0

10.0

0.17/0.21

0.17/0.21

0.82/1.01

0.82/1.01

PDFY-P71

VM-A

8.0

9.0

0.15/0.18

0.15/0.18

0.72/0.88

0.72/0.88

1,160

39 52

0.140 0.190

Sirocco fan

X2

12.5-14.0-16.0-18.0
30/50/100 50/100/130

14.5-16.5-18.5-21.013.5-15.5-17.5-19.5

19.5-28.0 24.0-34.0

1,510

775735

Airflow rate

(Low-Middle2-Middle1-High)

ø15.88 ø19.05

30-34-36-39 32-36-38-4131-35-37-40 34(37)-42(44) 40(42)-45(46)

34-36-37-3928-30-33-36

0.13/0.15

0.13/0.15

0.60/0.71

0.60/0.71

0.13/0.15

0.13/0.15

0.60/0.71

0.60/0.71

ø 12.7
ø 6.35

ø 15.88

ø 9.52

Note: 1.Cooling / Heating capacity indicates the maximum value at operation under the following condition.

Cooling :Indoor 27°CDB/19°CWB Heating :Indoor 20°C

:Outdoor 35°CDB :Outdoor 7°CDB/6°CWB

2.Value in ( ) indicates Noise level at the 240volt/50Hz .

SPECIFICATION3

LEV

C1 3.0µF X 440V 5.0µF X 440V

5.0µF

X 440V

8.0µF

X 440V

6.0µF X 440V

MF1,2

PDFY-P20

VM-A

PDFY-P125

VM-A

PDFY-P100

VM-A

PDFY-P80

VM-A

PDFY-P71

VM-A

PDFY-P63

VM-A

PDFY-P50

VM-A

PDFY-P40

VM-A

PDFY-P32

VM-A

PDFY-P25

VM-A

3-2. Electrical par ts specifications

Model

Parts

name

Tranrsformer T

(Primary) 240V 50Hz (Secondary) (23.5V 0.9A)

TH21 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

TH22

Gas pipe
thermistor

FUSE

250V 6.3A

TB2

(L,N, ) 330V 30A

TB5
TB15

(1,2),(M1,M2,S) 330V 10A

Fuse

(Indoor con-

troller board)

Power supply
terminal bed

Transmission
terminal bed

OFF 130˚C±5˚C

ON 90˚C±20˚C

OFF 150˚C±5˚C

ON 96˚C±15˚C

Room
temperature
thermistor

Fan motor

(with Inner-

thermostat)

DC12V Stepping motor drive port

dimension 5.2

Ω

(0~2000pulse)

EDM-804MD

4-pole OUTPUT 75W

D104P75MW

4-pole Output 75W

D104P85MW

4-pole

4-pole

Output

Output

78W

140W

D10C4P95MW

NC-100VM1

4-pole

Output

190W

NC-125VM1

Symbol

DC12V Stepping motor drive port

dimension 3.2

Ω

(0~2000pulse)

EDM-402MD

TH23

Inner­thermostat

(Fan motor)

Liquid pipe
thermistor

Fan motor
capacitor

Linear
expansion valve

7

8

E 50

4-ø3.4 burringH-ø3 hole

H

10

8

6155

180

180

200

200

200

198 21

20

G G G G F

20

12

735

1070

168 36

PDFY-P40·50VM-A

2

1

20

20

17

17

670(Lifting bolt pitch)

670(Lifting bolt pitch) 31

When fixing the panel to indoor unit,

this dimensinon may be 50~65.

140~300

20

3

2

1

64

111

C

566(Ceiling opening)

58

20

B(Ceiling opening)

12 D(Lifting bolt pitch)

Panel (option)

870

620

1136

936

686

1160

960

710

1200

1000

750

1240

1040

790

64

Model

20~40

Gas pipe : LP ø12.7

Liquid pipe : HP ø6.35

Model

50~80

Gas pipe : LP ø15.88

Liquid pipe : HP ø9.52

···················································

················································

·················································

···············································

Drain hose VP-25 <flexible joint 200mm> (accessory) ··

Note:1. Use M10 screw for the lifting bolt (field supply).

GFEDCBAMODEL

PDFY-P63·71·80VM-A

PDFY-P20·25·32VM-A

A

600

D(Lifting bolt pitch)12 12

478

265

28

295

190

(❇2)

(❇2)

(❇1)When installing the drain water lifting-up mech(option).

(❇1)

(❇1)

(❇1)

Control box

Power source

entry

Transmission

entry

Air filter

Drain hole

Water filling port

Lifting bolt hole

4-14✕22 hole

Fresh air intake ø150 knock out hole

4-ø3 Mounting hole

300mm or less

600mmMAX

3

3

3

2

1

2

1

2

1

3

ø

172

123

126

172

Unit : mm

OUTLINES AND DIMENSIONS4

Indoor Unit

PDFY-P20·25·32·40·50·63·71·80VM-A

4-ø3.4 burring14-ø3 hole

238 21

200 200 200 200 200 200 155

20

20

216 36

1420 50

When fixing the panel to indoor unit,

this dimensinon may be 50~65.

Panel (option)

312

Note:1. Use M10 screw for the lifting bolt (field supply).

Gas pipe : LP ø19.05 ···············································

Liquid pipe : HP ø9.52 ··············································

Drain hose VP-25 <flexible joint 200mm> (accessory)···

20

20

17

17

710(Lifting bolt pitch)

670(Lifting bolt pitch) 31

140~300

20<270>

64

566(Ceiling opening)

58

20

64

600

12 12

478

28

(❇2)

(❇2)

(❇1)When installing the drain water lifting-up mech(option).

(❇1)

(❇1)

(❇1)

4-ø3 Mounting hole

Fresh air intake ø150 knock out hole

Control box

Power source

entry

Transmission

entry

Air filter

Water filling port

Drain hole

Lifting bolt hole

4-14✕22 hole

3

600mmMAX

300mm or less

1

2

3

3

2

1

2

1

3

ø

17

2

12 1486(Lifting bolt pitch) 12

151

335

305

206

156

139

1550(Ceiling opening)

190

274

775

121

34

1510

1486(Lifting bolt pitch)

1590

Unit : mm

9

Indoor Unit

PDFY-P100,125VM-A

10

WIRING DIAGRAM5

TO MA REMOTE CONTROLLER

TB15(TRANSMISSION TERMINAL BED)

1

2

3

1

I.B

CN3A

1
3

5

INSIDE SECTION OF CONTROL BOX

FAN2

TB5(TRANSMISSION TERMINAL BED)

2

1

CN2M

F

ZNR

FAN CON

X1

TO OUTDOOR UNIT

BC CONTROLLER

REMOTE CONTROLLER

M1

M2

S(SHIELD)

6.3A F

AC250V

( )

CND

FAN1

X4

CNP

CNTCN60CN31CN21CN20CN81

CN3T

PULL BOX

TO NEXT INDOOR UNIT

TB2

L

3

1

S.B

CN1

DSA1

ZNR1

C

556

3

T

31

222 3 3 334

BREAKER(16A)

FUSE(16A)

POWER SUPPLY

~ 220-240V 50Hz

220V 60Hz

TO DUCT

N

PE

PE

(5A)

F2

connector, board insertion

connector or fastening connector

of control board.

2.Mark indicates terminal bed,

3. :optional parts

Capacitor

✻

MODELS 20/25/32 3.0µF

MODELS 40/50 5.0µF

MODELS 63/71/80 6.0µF

(Red)

1
2
4

(White)

1

32

(White)

(Red)

For test of pumpout

MF

NOTE 3

✻

DP

field work.

(after confirm drain pump out,

take this connector off.)

NOTE;1.TB2,TB5 shown in dotted line are

inside < > is the optional parts.

NAME NAME

LEV

121

CN31

CN62

SW5

SWCSWA

Drain sensor

65432

7

8

CN82

SW1

1

0

9

1

0

9

2

1

0

F

E

12

CN29

(Black)(White)(Red)

11 1 1 11

SW2

SW3

SW4

CN42

124

3

PDFY-P20~80VM-A

56
423

1

87654321

A.B

Thermistor (piping temp.detection/liquid)

Thermistor (piping temp.detection/gas)

Switch (option parts)

Switch (option parts)

1

3

1

3

2

4

5

6

SW11

7

4

3

7

5

C

4

5

6

6

7

8

9

A

B

(1st digit)

SW12

(2nd digit)

SW14

(Connection No.)

8

2

8

3

D

DS

NOTE 3

✻

SYMBOL SYMBOL

TH23TH22

TH21

SYMBOL EXPLANATION

TH22

TH23

SWA(A.B)

SWC(A.B)

Capacitor (for MF)

✻

Address board

Indoor controller board

Fan motor

C

I.B

MF

A.B

Switch (connection No.set)

Switch (2nd digit address set)

Switch (1st digit address set)

SW12(A.B)

SW11(A.B)

Power source terminal bed

Transmission terminal bed

Switch(for capacity code)

Switch(for mode selection)

SW2(I.B)

SW1(A.B)

SW14(A.B)

Fuse AC250V 6.3A F

Fuse AC250V 5A F

Transmission terminal bed

F

TB2

TB5

TB15

<F2>

Switch(for voltage selection)

Aux.relay

Switch(for model selection)

Switch(for mode selection)

SW3(I.B)

SW4(I.B)

Transformer

Drain pump

Surge absorber board

S.B

X1,X4

SW5(A.B)

Thermistor (inlet temp.detection)

Electronic linear expan. valve

Drain sensor

T

LEV

TH21

<DS>

<DP>

11

PULL BOX

FUSE(16A)

BREAKER(16A)

TO MA REMOTE CONTROLLER

TB15(TRANSMISSION TERMINAL BED)

1

2

3

1

I.B

CN3A

INSIDE SECTION OF CONTROL BOX

TB5(TRANSMISSION TERMINAL BED)

2

1

CN2M

F

ZNR

X05X06 X04

X01

TO OUTDOOR UNIT

BC CONTROLLER

REMOTE CONTROLLER

M1

M2

S(SHIELD)

6.3A F

AC250V

( )

CND

FAN3

CNP

CNTCN60CN31CN21CN20CN81

CN3T

TO NEXT INDOOR UNIT

TB2

L

3

1

S.B

CN1

DSA1

ZNR1

C

5756

3

T

31

222 3 3 3 34

220-240V 50Hz

POWER SUPPLY

˜

220V 60Hz

TO DUCT

N

PE

indicate using fore-sided duct flange.

The following external static pressure

PE

(5A)

F2

(Red)

1
2
4

(White)
1

32

(White)

(Red)

For test of pumpout

(after confirm drain pump out,

MF

DP

NOTE 3

✻

✻

take this connector off.)

1

42
1

42

Connector color

C

(Red) (Blue)

White··· In case of used 50Pa.

connector, board insertion

connector or fastening connector

field work.

NOTE;1.TB2,TB5 shown in dotted line are

Red ··· In case of used 100Pa or 70Pa included <h.e.f>.

Blue ··· In case of used 130Pa or 100Pa included <h.e.f>.

(<h.e.f>:high efficiency filter)

of control board.

2.Mark indicates terminal bed,

3. :optional parts

Capacitor

MODELS 125 8.0µF

MODELS 100 5.0µF

✻

inside < > is the optional parts.

NAME NAME

LEV

121

12

CN29

(Black)(White)(Red)

11 1 1 1 1

SW2

SW3

SW4

CN42

124

3

PDFY-P100•125VM-A

56
423

1

A.B

87654321

CN62

SW5

7

8

SW1

65432

CN82

1

3

CN31

Drain sensor

1

3

2

4

1

5

0

6

9

7

8

3

2

4

1

5

0

6

9

7

8

4

5

3

6

2

7

1

8

0

9

F

A

E

B

D

C

SW11

(1st digit)

SW12

(2nd digit)

SW14

(Connection No.)

NOTE 3

✻

DS

SYMBOL SYMBOL

TH23TH22

TH21

SYMBOL EXPLANATION

Thermistor (piping temp.detection/liquid)

Thermistor (piping temp.detection/gas)

Switch (option parts)

Switch (option parts)

TH23

TH22

SWA(A.B)

SWC(A.B)

Capacitor (for MF)

✻

Address board

Indoor controller board

Fan motor

C

I.B

MF

A.B

Switch (connection No.set)

Switch (2nd digit address set)

Switch (1st digit address set)

SW11(A.B)

Power source terminal bed

Switch(for mode selection)

SW1(A.B)

SW14(A.B)

SW12(A.B)

Fuse AC250V 6.3A F

Transmission terminal bed

Transmission terminal bed

F

TB2

TB5

TB15

Switch(for model selection)

Switch(for mode selection)

Switch(for capacity code)

SW3(I.B)

SW2(I.B)

SW4(I.B)

Transformer

Drain pump

Fuse AC250V 5A F

T

<F2>

<DP>

Switch(for voltage selection)

Aux.relay

Surge absorber board

˜

S.B

SW5(A.B)

X01,X04 X06

Thermistor (inlet temp.detection)

Electronic linear expan. valve

Drain sensor

LEV

TH21

<DS>

12

Gas pipe

PDFY-P20,25,32,40VM-A

ø12.7<1/2F>

PDFY-P50,63,71,80VM-A

ø15.88<5/8F>

PDFY-P100,125VM-A

ø19.05<3/4F>

Liquid pipe

ø6.35<1/4F> ø9.52<3/8F> ø9.52<3/8F>

Capacity

Item

REFRIGERANT SYSTEM DIAGRAM6

Gas pipe thermistor TH23

Gas pipe

Liquid pipe thermistor TH22

Flare connection

Heat exchanger

Linear expansion valve

Strainer (#100mesh)

Room temparature thermistor TH21

Strainer (#100mesh)

13

Room temparature
thermistor

(TH21)

Liquid pipe thermistor

(TH22)

Gas pipe thermistor

(TH23)

Transformer

Fan motor

Linear expansion
valve

Disconnect the connector, then measure the resistance using a tester.
(Sorrounding temperature 10˚C~30˚C)

Disconnect the connector and measure the resistance using a tester.

Measure the resistance between the terminals using a tester. (at 20˚C)

20˚C)

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

(Refer to the thermistor)

Normal

4.3kΩ~9.6k

Ω

Abnormal

Open or short

CNT(1)-(3)

Normal

App.45

Ω

CN3T(1)-(3)

App.1

Ω

Abnormal

Open or short

Motor terminal

or

Relay connector

Normal

Abnormal

Orange-Gray

Gray-Orange

Orange-Black

Black-Blue

Blue-Yellow

Yellow-Red

43.1Ω

P20~P50P63~P80

Open or short

Brack-Gray

53.6Ω

40.5Ω

53.6Ω

23.5Ω

P100 P125

4.79Ω

6.78Ω

13.77Ω

29.8Ω

16.45Ω

8.30Ω

1.454Ω

7.94Ω

21.9Ω

Normal

(1)-(5)

White-Red

150

Ω

±10%

Abnormal

Open or short

(2)-(6)

Yellow-

Blown

(3)-(5)

Orange-Red

(4)-(6)

Blue-Brown

1
2
3

1
2
3

CNT T CN3T

Red Blue

Blue

White

1

1

2

2

4

4

Orange

Black

Gray

Relay connector

Protector

1
2
3
4
5
6

LEV

White
Yellow

Orange
Blue

Red
Brown

CN60

Parts name Check points

4

1

4

4
2

2
1

Black

Blue

Red

Gray

Yellow

Yellow

Yellow

Gray

Orange

White

Relay connector

Protector

Gray

C

PDFY

- P20~80VM

PDFY

-

P100·125VM

Motor terminal

or

Relay connector

Normal

Abnormal

Open or short

Measure the resistance between the terminals using a tester.

(at

7 TROUBLE SHOOTING

7-1. How to check the parts

<Thermistor Characteristic graph>

Room temparature thermistor(TH21)
Liquid pipe thermistor(TH22)
Gas pipe temparature thermistor(TH23)
Drain sensor(DS)

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

Rt=15exp { 3480( ) }
0˚C 15kΩ

10˚C 9.6kΩ
20˚C 6.3kΩ
25˚C 5.2kΩ
30˚C 4.3kΩ
40 3.0kΩ

Thermistor for
lower temperature

Linear expansion valve

1 Operation summary of the linear expansion valve.

• Linear expansion valve open/close through stepping motor after receiving the pulse signal from the indoor controller board.

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

1

273+t

1

273

14

< Thermistor for lower temperature >

50

40

30

Resistance (kΩ )

20

10

0

-20 -10 0 10 20 30 40 50
Temperature (˚C)

Controller board

DC12V

Linear expansion valve

4

M

6

2

5

White

1

Red

3

Orange

Blue

Brown

Yellow

ø4
ø3

ø2
ø1

Brown

Red

Blue

Orange

Yellow

White

Connector(CN60)

6
5

4
3

2
1

Drive circuit

ø4
ø3

ø2
ø1

Output

(Phase)

Output

ø1

1

ON

ø2

ON

ø3

OFF

ø4

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

Symptom

Check points

Operation circuit fail-

ure 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 turn on. If there is LED with lights on or lights
off, 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 are
some leaking, detecting temperature of the
thermistor will go lower. If the detected
temperature is much lower than the temper-

ature 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.

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 vale.

Exchange the linear
expansion valve.

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

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

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

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 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
position.

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

✻

✻

✻

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

15

Valve position (capacity)

A

E

B

Close

D

Open

Pulse number

C

2000 pulse
Opening a valve
all the way

Extra tightning (80~100pulse)

LED1kΩ

Thermistor
(TH21)

Linear
expansion
valve

6
5
4
3
2
1

150Ω

10%.

1
2
3
4
5
6
7
8
9

10

1~6

1
2
3
4
5
6
7
8

1~4

Thermistor<Intake temperature
detection>position

ON OFF

Filter crogging detection Provided Not provided
Filter life 2,500hr 100hr
Air intake Effective Not effective
Remote indication switching Thermostat ON signal indication Fan output indication
Humidifier control

Always operated while the heat is ON

Operated depends on the condition
Air flow st Low Extra low
Heat thermostat OFF Setting air flow Reset to SW1-7
Auto reset function Effective Not effective
Power ON/OFF Effective Not effective

Heat pump/Cool only Cooling only Heat pump
Louver Available Not available
Vane Available Not available
Vane swing function Available Not available
Vane holizontal angle Second setting First setting
Vane cooling limit angle setting

Horizontal angle Down blow

Heating 4deg up Not effective Effective

ON

OFF

1234

ON

OFF

12345678

ON

OFF

12345678910

ON

OFF

123456

ON

OFF

123456

MODELS SW2 MODELS SW2 MODELS SW2

PDFY-

P20VM-A

PDFY-

P25VM-A

PDFY-

P50VM-A

PDFY-

P80VM-A

Address board

<At delivery>

Indoor controller board

Indoor controller board

Indoor controller board

<At delivery>

<At delivery>

SW4

Unit

Selection

SW3

Function

Selection

SW2

Capacity

code

setting

SW1

Mode

Selection

Switch Pole

Function

Built-in remote controller

Indoor unit

Set while the unit is off.

<At delivery>

Set for each capacity.

Set while the unit is off.

(Note) At cooling mode, each

angle can be used only 1
hour.

Set while the unit is off.

Operation by switch

Remarks

ON

OFF

123456

PDFY-

P100VM-A

PDFY-

P40VM-A

PDFY-

P71VM-A

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

PDFY-

P32VM-A

PDFY-

P63VM-A

ON

OFF

123456

PDFY-

P125VM-A

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

Note :The DipSW setting is effective during unit stopping ( remote controller OFF ) for SW1,2,3 and 4 commonly and the

power source is not required to reset.

ON

OFF

1234

P20 P80

P100,125

˜

16

Address board

Address board

Address board

Address board

Operation by switchSwitch Pole Remarks

❇ As this switch is used by interlocking with

SWC,refer to the item of SWC for detail

<At delivery>

<At delivery>

<At delivery>

<At delivery>

1~3

SWA

Option

2

SWC

Option

SW11
1st digit
address

setting

SW12

2nd degit

address

setting

Rotary switch

SW14

Connect

ion No.

setting

Rotary switch

When attach 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 air­flow reducing.

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.

Address board

<At delivery>

2

SW5

Voltage

Selection

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

Address can be set while the
unit is stopped.

Note:1

Note:1

Note:2

Note:2

Note:2

Note 1:The DipSW setting is effective always after powering ( remote controller ON ) for SWA and SWC.

2:The DipSW setting is effective during unit stopping ( remote controller OFF ) for SW11,12,14 and 5

(Option)

(Standard)

(Option)

(Standard)

17

3
2
1

3
2
1

1
2
3

(SWA)

SW12

8

7

9

10

0

6

1

2

3

4

5

SW14

0

F

E

D

C

B

A

9

SW11

1

2

3

4

5

6

7

8

0

9

8

7

6

5

1

220V 240V

SWC

1

2

3

4

SW12

SW11

0

9

8

7

6

0

1

5

1

9

2

4

2

8

3

3

7

4

6

5

SW14

0

1

2

F

3

E

4

D

5

C

6

B

7

A

8

9

220V 240V

(A)

1

(B)

Fig.1

Fig.2

Fig.3

18

OPERATING PROCEDURE PHOTOS

DISASSEMBLY PROCEDURE8

8-1 CONTROL BOX

Be careful removing heavy parts.

1.Removing the control box cover

(1)Remove the fixing screws(two) of the co ver(A) and

remove the cover.

2.Removing the control box and cover

(1)Remove the fixing screw and earth screw.
(2)Slide the control box in direction of the arrow 1.

(3)Remove the connecter on the P.W.B.
(4)Remove the fixing screws(two) of the co ver(B) and

remove the cover.

(C)

(F),(G)

(D),(E)

Fig.1

Fig.2

Fig.1

19

Be careful removing heavy parts.

8-2 THERMISTOR (Liquid piping temperature detection)

8-3 THERMISTOR (Intake air temperature detection)

OPERATING PROCEDURE PHOTOS

1.Removing the thermistor and thermistor holder

(1)Pull out the thermistor holder(F) and thermistor

(G) which are fixed the control box.

OPERATING PROCEDURE PHOTOS

1.Removing the cover

(1)Remove the fixing screws(two) of the co v er(C) and

remove the cover.

2.Removing the thermistor

(1)Remove the thermistor(D), from the thermistor

holder(E), which are installed on the copper tube.

(H)

(I)

1

2

Fig.1

Fig.2

20

OPERATING PROCEDURE PHOTOS

8-4 DRAINPAN

1.Removing the cover

(1)Remove the fixing screws of the cover(H) and

remove the cover.

2.Removing the drainpan

(1)Pull and remove the drainpan in the direction of

the arrow 1 and 2 alternatively.

(J)

Fig.1

Fig.2

(K),(L)

21

OPERATING PROCEDURE PHOTOS

8-5 THERMISTOR (Gus piping temperature detection)

1.Removing the cover

(1)Remove the fixing screw of the cover(J) and

remove the cover.

2.Removing the thermistor

(1)Remove the thermistor(K), from the thermistor

holder(L), which are installed on the copper tube.

(M)

(N)

(R)

fan motor shaft
fixing screw

Fig.1

Fig.2

Fig.3

1

2

2

3

3

(P)

(Q)

22

OPERATING PROCEDURE PHOTOS

8-6 FAN and FAN MOTOR

1.Removing the filter

(1)Press the tabs of the filter and remove the filter in

the direction of the arrow 1.

2.Removing the control box with procedure 8-1

3.Removing the bottom plate

(1)Remove the fixing screws (two) of the bottom

plate(N) and remove the plate.

4.Removing the cable

(1)Remove the cable(P) threw the rubber bush.

5.Sliding the fan section

(1)Remove the fixing screws(two) of the fan base

plate.

(2)Pull up the fan section(Q) in direction of the arrow

2 and slide the direction of the arrow 3.

6.Removing fan casing and sirroco fan

(1)Remove the fixing screws (four) of the fan cas-

ing(R).

(2)Remove the fan motor shaft fixing screw and

remove the fan casing(R) and sirroco fan.

7.Removing the fan motor

(1)Remove the condensor cable

(in case of Model:PDFY-P100,125VM)

(2)Remove the fixing screws of the motor fixtures

(two) and remove the motor.

Notice:Incase of the Model(PDFY-P40~125VM) stick

out the motor shafts on both side of the motor.

Fig.1

Fig.2

(S)

23

OPERATING PROCEDURE PHOTOS

8-7 HEAT EXCHANGER

1.Removing the drainpan with procedure 8-4

2.Removing the cover(J) with procedure 8-5

3.Removing the Heat exchanger

(1)Remove the fixing screws of the heat exchang-

er(S) and remove the heat exchanger.

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

Issued in May. 2001 MEE01K052
Printed in Japan

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