Mitsubishi PEFY-P20VMM-A, PEFY-P25VMM-A, PEFY-P32VMM-A, PEFY-P40VMM-A, PEFY-P50VMM-A Service Manual

TECHNICAL & SERVICE MANUAL

Air-Conditioners For Building Application

PEFY-P20VMM-A,PEFY-P71VMM-A PEFY-P25VMM-A,PEFY-P80VMM-A PEFY-P32VMM-A,PEFY-P100VMM-A PEFY-P40VMM-A,PEFY-P125VMM-A PEFY-P50VMM-A,PEFY-P140VMM-A PEFY-P63VMM-A

2001

Models

INDOOR UNIT

Ceiling Concealed

Series PEFY

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

SAFETY PRECAUTIONS

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

• Prepare for ty phoons and othe r str ong wi nds an d earthquak es and install the unit at the specified place.

- Improper in stal lati on may cause th e unit to to pple and re sult in

injury.

• Always use an air c leaner, humidi fie r, electric hea ter, and other accessories specified by Mitsubishi Electric.

- Ask an authorized technician to install the accessories. Improper

installati on by th e user may re sult in water leakag e, el ectric shoc k, or fire.

• Never repair the uni t. If the air con dit ion er must be rep air ed, 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 ai r cond itio ner ac cor ding to th is In stalla tion Man ual.

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

fire may result.

• Have all electr ic w ork don e b y a lic ensed ele ctrici an accor din g 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 inadequa te or elec tric work is per-

formed improperly, electric shock and fire may result.

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

- If the cov er and pan el are not ins tal led pro perly,dust or w ate r may

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

• When installi ng an d mo ving the air co ndit ione r to anot her si te, do not charge the it with a refrigerant differen t fr om the refrigerant (R407C or R22) specified on the unit.

- If a different refriger ant or air is mixed wit h the original refriger ant,

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

• If the air conditioner is installed in a small room, measures must be take n to pr event th e re fr ig er ant co ncen tr at ion from exceeding the safety limit even if the refrigerant should leak.

- Consult the de aler rega rdin g the ap propr ia te me asures to pre-

vent the safety limit from being exceeded. Should the refrigerant leak and cause th e safety li mit to be exceed ed , haza rds du e 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 re cons tr uc t or chan g e th e se ttin gs of the prote ct ion devices.

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

is shorted an d op erat ed f orci bly, or parts ot her th an th ose spec ified by Mitsubishi Electric are used, fire or explosion may result.

1. Befor e instal lati on and elec tric 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 This equipment may cause the adverse effect on the

same supply system.

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 pr ecau tion s that shou ld be obse rved to pre vent dama ge 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 tha t cau tion should be taken wit h rot ati ng parts. (This

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

: Beware of electric shock (This sym bol is dis played on the main

unit label.) <Color: Yellow>

Warning:

Carefully read the labels affixed to the main unit.

Warning:

• Ask the dealer or an aut horized tec hnicia n to instal l the air conditioner.

- Improper installatio n b y the use r ma y result in w ater lea kage , elec -

tric shock, or fire.

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

- Inadequate str eng th may cause the uni t to fall down, res ult ing in

injuries.

• Use the specified cables for wiring. Make the connections securely so th at th e ou tsid e f or ce of th e ca ble is no t ap plie d to the terminals.

1

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 refriger ant pi ping made of ph osph orus per.

deoxidized cop-

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,

minant.

oils, moisture, or any other conta-

- Contaminan ts on th e in si de of the re fr ig er an t pi pi ng may caus e the refrigerant residual oil to deteriorate.

• Store th e pipi ng to be us ed du ring inst alla tion indo or s 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 alk ylb enzene (small amo unt ) as the refrigerator oil to coat flares and flange connections.

- The refrigerat or oi l wi ll de gr ade if it is mi x ed wi th a larg e am ount of

mineral oil.

• Use liquid refrigerant to fill the system.

- If gas refrigerant is used to seal the system, the composition of

the refrigera nt in the cyli nder will chan ge and pe rfor manc e 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 back into the refriger ant cycl e and

cause the refrigerator oil to deteriorate.

• Do not use the following tools that are used with conventional 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 refrige ra tor oil may deteriorate.

- Since R407C do es no t cont ain any ch lor in e, ga s leak dete ctor s

for conventional refrigerants will not react to it.

• Do not use a charging cylinder.

- Using a charging cylind er ma y caus e the re friger ant to de terior ate.

• Be especially careful when managing the tools.

- If dust, dirt, or water gets in the refr igerant cyc le, the ref rige rant

may deteriorate.

2

PEFY-P20VMM-A PEFY-P25VMM-A PEFY-P32VMM-A PEFY-P40VMM-A PEFY-P50VMM-A PEFY-P63VMM-A PEFY-P71VMM-A PEFY-P80VMM-A PEFY-P100VMM-A PEFY-P125VMM-A PEFY-P140VMM-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

16.0/18.0

FEATURES

1

Indoor unit

Ceiling Concealed

Series PEFY

Models

Cooling capacity/Heating capacity

kW

3

PART NAMES AND FUNCTIONS

2

● 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.

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

456879

0

C

A

B

Air inlet

Air outlet

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

Air inlet

Air outlet

[In case of rear inlet]

[In case of bottom inlet]

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.

4

● 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

5

E

F

STAND BY DEFROST

G

ABCD

CENTRALLY CONTROLLED

CHECK

TEMP.

˚C

ON OFF

CLOCK

ERROR CODE

HIKLJ

1Hr.

NOT AVAILABLE

SQTU

˚C

CHECK MODE

ON/OFF

FILTER

TEST RUN FUNCTION

R P

O N M

3

SPECIFICATION

3-1. Specification

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

Cooling :Indoor 27¡CDB/19.0¡CWB Heating :Indoor 20¡C

:Outdoor 35¡CDB :Outdoor 7¡CDB/6¡CWB

2.The external static pressure is set to 50 Pa at factory shipment.

0.078

220-240

50

Galvanized steel plate

325

740

Cross fin( Alminium plate fin and copper tube)

Single phase induction motor

P.P. honeycomb

ø9.52

R1(External thread)

Power source

Model

PEFY-P20

VMM-A

PEFY-P25

VMM-A

PEFY-P32

VMM-A

PEFY-P40

VMM-A

PEFY-P50

VMM-A

Item

Dimension

Fan

Motor

Refrigerant

pipe dimension

Power consumption

Current

Cooling capacity Heating capacity

External finish

Net weight

Heat exchanger

Air filter

Drain pipe dimension

Noise level

(Low-[Middle]-High)

Voltage

Frequency

Cooling Heating Cooling Heating

Height

Width Depth

Type

External static pressure

Type

Output

Gas(Flare)

Liquid(Flare)

~

/N V Hz kW kW kW kW

A A

mm mm mm

kg

m3/min

Pa

kW

mm mm

dB

220-240

50

3.6

4.0

0.17

0.81

Galvanized steel plate

295

700

Cross fin( Alminium plate fin and copper tube)

7.5-9.0-10.5

30/50/100

Single phase induction motor

0.075

R1(External thread)

4.5

5.0

5.6

6.3

2.2

2.5

2.8

3.2

0.15

0.73

815

Note:1 Note:1

Note:2

27

Sirocco fan

X

1

6.0-7.2-8.5 10.0-12.0-14.0 12.0-14.5-17.0

Sirocco fanX2

33

295

700

935

Airflow rate

(Low-[Middle]-High)

Power source

Model

PEFY-P71

VMM-A

PEFY-P63

VMM-A

PEFY-P80

VMM-A

PEFY-P100

VMM-A

PEFY-P125

VMM-A

Item

Dimension

Fan

Motor

Refrigerant

pipe dimension

Power consumption

Current

Cooling capacity Heating capacity

External finish

Net weight

Heat exchanger

Air filter

Drain pipe dimension

Noise level

(Low-[Middle]-High)

Voltage

Frequency

Cooling Heating Cooling Heating

Height

Width Depth

Type

External static pressure

Type

Output

Gas(Flare)

Liquid(Flare)

~

/N V Hz kW kW kW kW

A A

mm mm mm

kg

m3/min

Pa

kW

mm mm

dB

11.2

12.5

0.29

1.34

14.0

16.0

0.40

1.90

8.0

9.0

0.25

7.1

8.0

0.22

1.07

9.0

10.0

0.25

1.15

1,175

42

1,175

42

0.200

Sirocco fanX2

14.5-18.0-21.0

13.5-16.2-19.0

28.0-40.0

23.0-33.0

30/50/100 50/130

62 65

1,415 1,715

ø15.88 ø19.05

32-36-39

31-35-38

40-44 42-45

PEFY-P140

VMM-A

16.0

18.0

0.42

1.95

0.280

29.5-42.0

70

31-34-37 31-35-3828-32-3527-30-32

0.19

0.92

0.20

0.98

ø12.7 ø6.35

ø15.88

ø9.52

Airflow rate

(Low-[Middle]-High)

P.P. honeycomb

6

3-2. Electrical par ts specifications

7

Model

Parts

name

Transformer T (Primary) 50/60Hz 220-240V (Secondry) (18.4V 1.7A)

Room temperature thermistor

Liquid pipe thermistor

Gas pipe thermistor

Fuse

(Indoor con-

troller board)

Fan motor

(with Inner-

thermostat)

Innerthermostat

(Fan motor)

Symbol

MF1,2

PEFY-P20

VMM-A

TH21 Resistance 0˚C/15k

TH22 Resistance 0˚C/15k

TH23 Resistance 0˚C/15k½ ,10˚C/9.6k½ ,20˚C/6.3k½ ,25˚C/5.4k½ ,30˚C/4.3k½ ,40˚C/3.0k½

FUSE 250V 6.3A

PEFY-P25

VMM-A

4-pole Output 75W

D104P75MW

PEFY-P32

VMM-A

PEFY-P40

VMM-A

PEFY-P50

VMM-A

PEFY-P63

VMM-A

PEFY-P71

VMM-A

PEFY-P80

VMM-A

½ ,10˚C/9.6k½ ,20˚C/6.3k½ ,25˚C/5.4k½ ,30˚C/4.3k½ ,40˚C/3.0k½

4-pole

Output 75W

D104P85MW

OFF 130˚C ± 5

ON 90˚C ± 20

4-pole Output 78W

D10CP95MW

PEFY-P100

NS-100VM-1

VMM-A

4-pole

Output

200W

PEFY-P125

VMM-A

4-pole

Output

280W

NS-125VM-1

PEFY-P140

VMM-A

an motor

F capacitor

Linear expansion valve

Power supply terminal bed

Transmission terminal bed

C1 8.0µFX µFX µFX µFX440V 8.0 440V 6.0 440V 8.0 440V

DC12V Stepping motor drive port

LEV

TB2 (L,N, ) 330V 30A

TB5

TB15

dimension ø3.2 (0~2000pulse)

EDM-402MD

(M1,M2,S) (1,2)

300V 10A

DC12V Stepping motor drive

port dimension ø5.2 (0~20 00pulse)

EDM-804MD

DC12V

Stepping motor drive por t dimension ø6.4

(0~2000pulse)

EDM-1004MD

4

OUTLINES AND DIMENSIONS

Indoor Unit PEFY-P20•25•32•40•50•63•71•80VMM-A

Unit : mm

8

C B

176

10

81

A

81

256

40

10

15

7

4

1

2

6

5

3

85

29

22761

81

A

E 13

13

282

45

80

277

21

30

640 30

24 35

10

179 109

10

3.5

256

288

40

176

Set

450

A

C B 81

10

C

30D

10-ø3(1.6,2HP)

12-ø3(2.5HP)

10-ø3(1.6,2HP)

12-ø3(2.5HP)

10-ø3(1.6,2HP)

12-ø3(2.5HP)

In case of bottom inlet

In case of rear inlet

(14X22)

Lifting bolt hole

Air inlet

Air outlet

243

159

35556

10

81B

365~465

18

44 75

1234567

Refrigerant piping flare connection (liquid øF copper tube) :HP

Refrigerant piping flare connection (gas øG copper tube) :LP

Drain R1(External thread)

Electrical parts box

Drain Pump (Option)

Drain Pipe (Option)

• • • Flexible joint VP-25(I.D.ø32)

Filter

Keep duct-work length 850mm or more.

Be sure to apply the air filter near the air inlet grille.

Service space:500 or more

197

8155

Access door

Air outlet

Air inlet

15.889.52

804830305772

P50

12.7

12.76.35

6.35

G

15.88

F

9.52

684710245

---

652

P20,25,32

P40

P63,71,80

Model

1012

772 305

280 290

830

1070

804

1044

ABCDE

50~150

Indoor Unit PEFY-P100•125•140VMM-A

Unit : mm

9

29

C B 81

10

81

A

40

1811027915

30

282

Set

210

450

140

282

680

3

30

7

4

1

2

319

279

181

40

25

A

C B 81

10

375

10

80

C B 81AE 13

30D

20 35

30

10

53

169

In case of bottom inlet

In case of rear inlet

113

307

122

Lifting bolt hole

45

Air inlet

Air outlet

44

243

308

323

75

13

1234576

Refrigerant piping flare connection (liquid ø9.52 copper tube) :HP

Refrigerant piping flare connection (gas ø19.05 copper tube) :LP

Drain 25A (male screw)

Electrical parts box

Drain Pump (Option)

Drain Pipe (Option)

• • • Flexible joint VP25(I.D.ø32)

Filter

Keep duct-work length 850mm or more.

Be sure to apply the air filter near the air inlet grille.

Service space:500 or more

81

197

8155

Access door

Air outlet

Air inlet

15841610

470460

1552

P140

EDCBA

12841310

370360

1252

Model

P100 • 125

12-ø3

(14X22)

365~465

50~150

6

5

3

7

5

WIRING DIAGRAM

Indoor Unit PEFY-P20•25•32•40•50•63•71•80VMM-A

10

Thermistor (piping temp.detection/liquid)

Thermistor (piping temp.detection/gas)

Switch(for mode selection)

Switch(for capacity code)

Switch (2nd digit address set)

Switch (connection No.set)

Switch(for mode selection)

MODELS 20/25/32/40/50 8µF

MODELS 63/71/80 6µF

Switch(for model selection)

Ferrite core

Switch(for voltage selection)

DP

Drain pump

Drain sensor

DS

87654321

(Black)

(White)(Red)

(White)

1

423

(White)

POWER SUPPLY

~/N 220-240V 50Hz

TO DUCT

TO NEXT INDOOR UNIT

PULL BOX

FUSE(16A)

BREAKER(16A)

TO OUTDOOR UNIT

BC CONTROLLER

M-NET REMOTE

CONTROLLER

56

TO MA REMOTE CONTROLLER

SYMBOL SYMBOL

MF

C

I.B

A.B

F

T

LEV

Fan motor

Capacitor(for MF)

*Capacitor

Electronic linear expan. valve

Indoor controller board

Address board

Transformer

Thermistor (inlet temp.detection)

Switch (1st digit address set)

SW2(I.B)

SW3(I.B)

TH21

TH22

TH23

SW11(A.B)

SW12(A.B)

SW14(A.B)

SW1(A.B)

SW4(I.B)

TB2

TB5 Transmission terminal bed

Power source terminal bed

Fuse AC250V 6.3AF

FB1,2

SYMBOL EXPLANATION

NAME NAME

Surge absorber boardS.B

Swich (option parts)SWA(A.B)

SWC(A.B) Swich (option parts)

SW5(A.B)

TB15 Transmission terminal bed

0

9

8

7

6

2

1

9

8

7

6

5

4

3

2

1

2

3

4

5

6

7

8

9

0

5

4

3

F

E

D

C

B

A

TB2

TB5(TRANSMISSION TERMINAL BED)

TB15(TRANSMISSION TERMINAL BED)

OPTION

X1

X4

1

2

I.B

ZNR

CND

F

FAN1

FAN2

FAN CON

CNT

CN60

CN31

CN21CN20

CN81

6

5

4

3

2

1

11

1 2

2

1

3

1 3

3

5

2

M2

M1

L

N

C

T

1 3

5

A.B

SW12

(2nd digit)

SW11

(1st digit)

MF

SW3

SW2

7

8

SW14

(Connection No.)

CN29

12

1

2

4

3

CN42

SW1

LEV

TH23TH22TH21

SW4

ZNR1

3

1

CN1

DSA1

S.B

FB1

FB2

CN82

CN62

SWCSWA

SW5

3

1

CNP

1

2

1

2

23456

123456

3

1

CN31

DS

INSIDE SECTION OF CONTROL BOX

CN3T

CN2M

S(SHIELD)

AC250V

6.3AF

( )

PE

CN3A

OP

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

field work.

2.Mark indicates terminal bed,

connector, board insertion

connector or fastening connector

of control board.

Indoor Unit PEFY-P100•125•140VMM-A

11

X04~06

Aux.relay

87654321

(Black)(White)

(Red)

(White)

White Connector

for External static

pressure 50Pa

Red Connector

for External static

pressure 130Pa

1

234

M1

L

N

TO DUCT

PULL BOX

BREAKER(16A)

FUSE(16A)

POWER SUPPLY

~/N 220-240V 50Hz

TO NEXT INDOOR UNIT

TO OUTDOOR UNIT

BC CONTROLLER

M-NET REMOTE

CONTROLLER

56

TO MA REMOTE CONTROLLER

0

D

C

B

A

9

8

7

6

2

1

9

8

7

6

5

4

3

2

1

2

3

4

5

6

7

8

9

0

5

4

3

F

E

TB2

TB5(TRANSMISSION TERMINAL BED)

TB15(TRANSMISSION TERMINAL BED)

OPTION

I.B

CN60

CN31

CN21CN20

CN81

6

5

4

3

2

1

2

A.B

LEV

SW12

(2nd digit)

SW11

(1st digit)

TH22TH21

SW4

SW3

SW2

7

8

SW14

(Connection No.)

CN29

1

2

1

2

3

4

SW1

CN42

1 3

FAN3

CND

SW5

ZNR1

3

1

CN1

DSA1

S.B

CNT

CN62

CN82

CNP

TH23

FB

123456

3

1

2

CN31

1

DS

INSIDE SECTION OF CONTROL BOX

C

X06X05

X04

MF

1

2

M2

ZNR

1

3

T

CN2M

CN3T

S(SHIELD)

PE

CN3A

2

1

2

1

OP

12 3456

1

2 3

3

45

57

6

Thermistor (piping temp.detection/liquid)

Thermistor (piping temp.detection/gas)

Switch(for mode selection)

Switch(for capacity code)

Switch (2nd digit address set)

Switch (connection No.set)

Switch(for mode selection)

MODELS 100/125/140 8 F

Switch(for model selection)

Ferrite core

Switch(for voltage selection)

DP

Drain pump

Drain sensor

DS

MF

C

I.B

A.B

F

T

LEV

Fan motor

Capacitor(for MF)

*Capacitor

Electronic linear expan. valve

Indoor controller board

Address board

Transformer

Thermistor (inlet temp.detection)

Switch (1st digit address set)

SW2(I.B)

SW3(I.B)

TH21

TH22

TH23

SW11(A.B)

SW12(A.B)

SW14(A.B)

SW1(A.B)

SW4(I.B)

TB2

TB5 Transmission terminal bed

Power source terminal bed

Fuse AC250V 6.3AF

FB

SYMBOL SYMBOL

SYMBOL EXPLANATION

NAME NAME

Surge absorber boardS.B

SW5(A.B)

TB15 Transmission terminal bed

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

field work.

2.Mark indicates terminal bed,

connector, board insertion

connector or fastening connector

of control board.

F

AC250V

6.3AF

( )

REFRIGERANT SYSTEM DIAGRAM

6

Gas pipe

PEFY-P20,25,32,40VMM-A

ø12.7<1/2F>

PEFY-P50,63,71,80VMM-A

ø15.88<5/8F>

PEFY-P100,125,140VMM-A

ø19.05<3/4F>

Liquid pipe

ø6.35<1/4F> ø9.52<3/8F> ø9.52<3/8F>

Capacity

Item

12

Gas pipe thermistor TH23

Liquid pipe thermistor TH22

Heat exchanger

Linear expansion valve

Strainer (#100mesh)

Room temparature thermistor TH21

Strainer (#100mesh)

Gas pipe

Flare connection

7

TROUBLE SHOOTING

7-1. How to check the parts

Room temparature thermistor

(TH21)

Liquid pipe thermistor

(TH22)

Gas pipe thermistor

(TH23)

Trans

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)

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

(Refer to the thermistor)

Normal

4.3kW~9.6kW

Abnormal

Open or short

CNT(1)-(3)

Normal

App.45W

CN3T(1)-(3) App.1W

Abnormal

Open or short

Motor terminal

or

Relay connector

Normal Abnormal

Red-Black 43.1W

Open or short

White-Black 53.6W

Normal

(1)-(5)

White-Red

150W ±10%

Abnormal

Open or short

(2)-(6)

Yellow-

Blown

(3)-(5)

Orange-Red

(4)-(6)

Blue-Brown

Parts name Check points

PEFY

- P20~80VMM-A

PEFY

- P100VMM-A

PEFY

-

P125•140VMM-A

Motor terminal

or

Relay connector

Normal Abnormal

Orange-Gray 26.7W

Open or short

Black-Gray 32.5W

Yellow-Gray 37.9W

Blue-Gray 42.4W

Motor terminal

or

Relay connector

Normal Abnormal

Orange-Gray 11.6W

Open or short

Black-Gray 13.6W

Blue-Gray 15.4W

Yellow-Gray 18.1W

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

13

CNT T CN3T

Red Blue

1 2 3

White

Blue

LEV

White Yellow

Orange Blue

Red Brown

Red

C

White

Red

C

White

Protector

1 2 3

CN60

1 2 3 4 5 6

Relay connector

Protector

Relay connector

1

Red

White

2

3

Black

Protector

Orange

Black

Yellow Yellow

Blue Blue

Gray Gray

1 3 5

5

1

4

3

7

1

Orange

Black Blue

Blue Yellow

Yellow Gray

Gray

5

1

3

4

7

1

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

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

Rt=15exp { 3480( ) } 0˚C 15kW

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

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 expansion valve>

1

273+t

1

273

14

< Thermistor for lower temperature >

50

40

30

Resistance (kW)

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

➁

Linear expansion valve operation

➂

Trouble shooting

Symptom

Check points

Operation circuit failure of the micro processor.

Disconnect the connector on the controller board, then connect LED for checking.

Pulse signal will be sent out for 10 seconds as soon as the main switch is 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 lock and vibrate.

✻ When the switch is turned on, 2200 pulse closing valve signal will

be send till it goes to A point in order to define the valve position.

When the valve operates correctly, 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 a screw driver

handle while touching the screw driver to the linear expansion

valve.

15

Close

Valve position (capacity)

A

E

Open

D

C

2000 pulse Opening a valve all the way

Extra tightning (80~100pulse)

B

Pulse number

LED1k½

Thermistor (TH21)

Linear expansion valve

6 5 4 3 2 1

10%.

150½

7-2. FUNCTION OF DIP-SWITCH

:When both SW1-7 and SW1-8 are being set to ON, the fan stops at the heating thermostat OFF.

16

Switch Pole

1 2 3 4

SW1

Mode

Selection

5 6 7 8 9

10

SW2

Capacity

code

1~6

setting

Function

Operation by switch

ON OFF

Thermistor<Intake temperature

detection>position

Built-in remote controller Filter clogging 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 Operational while the heat is ON 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

MODELS SW2 MODELS SW2 MODELS SW2

PEFY-

P20VMM-A

PEFY-

P25VMM-A

PEFY-

P32VMM-A

PEFY-

P40VMM-A

ON

OFF

ON

OFF

ON

OFF

ON

OFF

123456

PEFY-

P50VMM-A

PEFY-

P63VMM-A

PEFY-

P71VMM-A

PEFY-

P80VMM-A

OFF

ON

OFF

ON OFF

ON

123456

Indoor unit

Operational, depending on the condition

PEFY-

P100VMM-A

PEFY-

P125VMM-A

PEFY-

P140VMM-A

OFF

ON

123456

Remarks

Address board

Indoor controller board

Set while the unit is off.

Set for each capacity.

Heat pump/Cool only Cooling only Heat pump

SW3

Function

Selection

1

Louver Available Not available

2

Vane Available Not available

3

Vane swing function Available Not available

4

Vane horizontal angle Second setting First setting

5

Vane cooling limit angle setting

6

Horizontal angle Down blow

7

Heating 4deg up Not effective Effective

8

Indoor controller board

Set while the unit is off.

9

10

P20~P80

SW4

Unit

1~4

Selection

ON

OFF

1234

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.

P100~P140

ON

OFF

Indoor controller board

Set while the unit is off.

1234

17

3 2 1

30Pa 50Pa 100Pa

Option

Standard

SWC

220V

240V

1 2 3

(SWA)

0

5

9

4

8

3

7

2

6

1

SW12

10

0

5

9

4

8

3

7

2

6

1

SW11

1

0

8

F

7

E

6

D

5

C

4

B

3

A

2

9

1

SW14

0

5

9

4

8

3

7

2

6

1

SW12

0

5

9

4

8

3

7

2

6

1

SW11

0

8

F

7

E

6

D

5

C

4

B

3

A

2

9

1

SW14

Address board

Operation by switchSwitch Pole Remarks

*This switch is for only P20~P80 type.

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

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

2

SW5

Voltage

Selection

If the unit is used in the 230V or 240V range, set the voltage to 240V. If the unit is being used in a 220V area, set

the voltage

to 220V.

Address can be set while the unit is stopped.

Note:1

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

As the factory setting is for use under an external static pressure of

17

50Pa, no switch operation is needed when using under the standard condition.

8

DISASSEMBLY PROCEDURE

OPERATING PROCEDURE PHOTOS

1.Removing the control box cover

(1) Remove the covers two fixing screws(A) and remove

the

the covers three fixing screws(B) and remove

the

cover.

8-1. CONTROL BOX

Be careful on removing heavy parts.

fig.1

fig.2

8-2.THERMISTOR (Liquid piping temperature detection)

OPERATING PROCEDURE PHOTOS

1.Removing the pipe fixing cover

(1) Remove

2.Removing the thermistor

(1) Remove the thermistor from the thermistor holder which is

installed on the copper tube.

fig.1

18

(A)

(B)

Drain pan

OPERATING PROCEDURE PHOTOS

1.Removing the thermistor and thermistor holder

(1) Pull out the thermistor holder (C) and thermistor (D).

8-3.THERMISTOR (Intake air temperature detection)

Be careful on removing heavy parts.

fig.1

fig.2

view from the opposite side.

8-4. DRAINPAN

OPERATING PROCEDURE

PHOTOS

1.Removing the drainpan

(1) Remove the drainpan (E) fixing screw . (2) Slide the drainpan in the direction of the arrow① and remove

in the direction of the arrow②.

Note: The bottom plate can remain in position during this

procedure.

fig.1

fig.2

19

(C),(D)

(E)

1

2

(E)

OPERATING PROCEDURE PHOTOS

1.Remove the drainpan with procedure 8-4.

2.Removing the bottom plate 2

(1) Remove the fixing screws (seven) of the bottom plate 2 (F)

and remove plate.fig.1.

3.Removing the thermistor

(1) Remove the thermistor (G) from the thermistor holder (H)

which is installed on the copper tube.

8-5.THERMISTOR (GAS piping temperature detection)

Be careful on removing heavy parts.

fig.1

fig.2

8-6. FAN and FAN MOTOR

OPERATING PROCEDURE PHOTOS

1.Removing the bottom plate 1 (L )

(1) Remove the fixing screws (eight) of the bottom plate 1 (I)

and remove plate.

2.Sliding the fan section

(1) Remove the fan motor cable connector in control box. (2) Remove the fixing screws (four) of the fan base plate. (3) Slide the fan section in direction of the arrow①

fig.1

fig.2

Note: The bottom plate can remain in position during this

procedure.

Note: The drain pan can remain in position during this

procedure.

20

(F)

(G),(H)

1

(I)

fan motor cable

OPERATING PROCEDURE PHOTOS

3.Removing the fan casing and sirocco fan

(1) Remove the fan casing fixing screws (four for each fan). (2) Remove the fan motor shaft fixing screw ( one for each fan)

and remove the fan casing and sirocco fan.

3.Removing the fan motor

(1) Remove the

Be careful on removing heavy parts.

fig.3

8-7. HEAT EXCHANGER

OPERATING PROCEDURE PHOTOS

1.Remove the drainpan with procedure 8-4

2.Remove the bottom plate 2 with procedure 8-5

3.Removing Heat exchanger

(1) Remove the fixing screws (four) of the heat exchanger (M)

and remove the heat exchanger.

fig.1

fig.2

Remove the motor clamps (L) two clamps secure the motor

capacitor cable (K).

(2)

on each side (over the rubber bushing).

21

(J)

(K)

(L)

fan motor shaft fixing screw

(M)

Issued in May.2001. MEE01K044 Printed in Japan

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

MITSUBISHI ELECTRIC CORPORATION

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

Mitsubishi PEFY-P20VMM-A, PEFY-P25VMM-A, PEFY-P32VMM-A, PEFY-P40VMM-A, PEFY-P50VMM-A Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual