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

<Indoor unit>

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

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

0.17

0.81

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

0.15

0.73

0.73

815

Note:1
Note:1

Note:1
Note:1

Note:2

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

0.29

1.34

1.34

14.0

16.0

0.40

0.40

1.90

1.90

8.0

9.0

0.25

0.25

7.1

8.0

0.22

0.22

1.07

1.07

9.0

10.0

0.25

0.25

1.15

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

0.42

1.95

1.95

0.280

29.5-42.0

70

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

0.19

0.19

0.92

0.92

0.20

0.20

0.98

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

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