Mitsubishi PKFY-P32VHM-E, PKFY-P40VHM-E, PKFY-P50VHM-E, PKFY-P32VHM-ER1, PKFY-P40VHM-ER1 Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

R407C R22R410A

February 2009

No. OCH442

REVISED EDITION-A

Indoor unit
[Model names] [Service Ref.]

PKFY-P32VHM-E

PKFY-P32VHM-E

PKFY-P32VHM-ER1

PKFY-P40VHM-E

PKFY-P40VHM-E

PKFY-P40VHM-ER1

PKFY-P50VHM-E

PKFY-P50VHM-E

PKFY-P50VHM-ER1

CONTENTS

1. TECHNICAL CHANGES .........................2

2. SAFETY PRECAUTION

3. PART NAMES AND FUNCTIONS

4. SPECIFICATION

5. OUTLINES AND DIMENSIONS

INDOOR UNIT

6. WIRING DIAGRAM

7. REFRIGERANT SYSTEM DIAGRAM

8. TROUBLESHOOTING

9. DISASSEMBLY PROCEDURE

Revision:

• PKFY-P32/40/50VHM-ER1

are added in REVISED
EDITION-A.

• Some descriptions have

been modified.

• Plase void OCH442.

Note:

• This manual describes

only service data of the
indoor units.

• RoHS compliant products

have <G> mark on the
spec name plate.

..........................

..........

.....................................

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...............................

..........................

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2
6

8
11
12
13
13
21

PARTS CATALOG (OCB442)

1

TECHNICAL CHANGES

PKFY-P32VHM-E PKFY-P32VHM-ER1
PKFY-P40VHM-E PKFY-P40VHM-ER1
PKFY-P50VHM-E PKFY-P50VHM-ER1

1. INDOOR CONTROLLER BOARD (I.B.) has been changed. (S/W version up)

2. Fan speed has been changed. (4 speed → 3 speed)

3. Heat exchanger has been changed.

PKFY-P32VHM-E
PKFY-P40VHM-E
PKFY-P50VHM-E

Service parts of room temp. thermistor (TH21) has been changed. (T7W E05 202 → R01 N20 202)
(The position to be attached has been changed. Band/PVC tube have been added.)

2

SAFETY PRECAUTION

CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R407C

Do not use the existing refrigerant piping.

The old refrigerant and lubricant in the existing piping
contain a large amount of chlorine which may cause the
lubricant deterioration of the new unit.

Use “low residual oil piping”

If there is a large amount of residual oil (hydraulic oil, etc.)
inside the piping and joints, deterioration of the lubricant
will result.

Store the piping to be used indoors during
installation and both ends sealed until just
before brazing.
(Store elbows and other joints in a plastic bag.)

If dust, dirt, or water enters the refrigerant cycle,
deterioration of the oil and compressor trouble may result.

Use ESTR , ETHER or HAB as the lubricant to
coat flares and flange connection parts.

If large amount of mineral oil enters, that can cause
deterioration of refrigerant oil etc.

Use liquid refrigerant to charge the system.

If gas refrigerant is used to seal the system, the composition
of the refrigerant in the cylinder will change and performance
may drop.

Do not use a refrigerant other than R407C.

If another refrigerant (R22, etc.) is used, the chlorine in the
refrigerant may cause the lubricant deterioration.

Use a vacuum pump with a reverse flow check valve.

The vacuum pump oil may flow back into the refrigerant
cycle and cause the lubricant deterioration.

Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.

[1] Cautions for service

· After recovering all the refrigerant in the unit, proceed to working.

· Do not release refrigerant in the air.

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

2

[2] Refrigerant recharging

(1) Refrigerant recharging process

1Direct charging from the cylinder.

·R407C cylinder available on the market has a syphon pipe.

·Leave the syphon pipe cylinder standing and recharge it.
(By liquid refrigerant)

Unit

Gravimeter

(2) Recharge in refrigerant leakage case

·After recovering the all refrigerant in the unit, proceed to working.

·Do not release the refrigerant in the air.

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

[3] Service tools

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

No. Tool name Specifications

 Gauge manifold ·Only for R407C

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

·Use high-tension side pressure of 3.43MPa·G or over.

 Charge hose ·Only for R407C

·Use pressure performance of 5.10MPa·G or over.

 Electronic scale

 Gas leak detector ·Use the detector for R134a or R407C.

 Adapter for reverse flow check ·Attach to vacuum pump.

 Refrigerant charge base

 Refrigerant cylinder ·For R407C ·Top of cylinder (Brown)

·Cylinder with syphon

 Refrigerant recovery equipment

—

—

—

33

Cautions for units utilizing refrigerant R410A

Do not use the existing refrigerant piping.

The old refrigerant and lubricant in the existing piping
contains a large amount of chlorine which may cause the
lubricant deterioration of the new unit.

Use “low residual oil piping”

If there is a large amount of residual oil (hydraulic oil, etc.)
inside the piping and joints, deterioration of the lubricant
will result.

Store the piping to be used indoors during
installation and both ends of the piping sealed
until just before brazing. (Leave elbow joints, etc.
in their packaging.)

If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com­pressor.

Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.

If large amount of mineral oil enters, that can cause deterio­ration of refrigerant oil etc.

Use a vacuum pump with a reverse flow check
valve.

Vacuum pump oil may flow back into refrigerant cycle and
that can cause deterioration of refrigerant oil etc.

Use the following tools specifically designed for
use with R410A refrigerant.

The following tools are necessary to use R410A refrigerant.

Tools for R410A
Gauge manifold
Charge hose

Gas leak detector

Torque wrench

Flare tool
Size adjustment gauge
Vacuum pump adaptor

Electronic refrigerant
charging scale

Handle tools with care.

If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com­pressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigera­nt will change and the efficiency will be lowered.

Charge refrigerant from liquid phase of gas
cylinder.

If the refrigerant is charged from gas phase, composition
change may occur in refrigerant and the efficiency will be
lowered.

Do not use refrigerant other than R410A.

If other refrigerant (R22 etc.) is used, chlorine in refrige­rant can cause deterioration of refrigerant oil etc.

Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.

4

[1] Cautions for service

(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from cylinder

· Check that cylinder for R410A on the market is syphon type.

· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

Unit

Gravimeter

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

No. Tool name Specifications

1 Gauge manifold ·Only for R410A

·Use the existing fitting

·Use high-tension side pressure of 5.3MPa·G or over.

2 Charge hose ·Only for R410A

·Use pressure performance of 5.09MPa·G or over.

3 Electronic scale

4 Gas leak detector ·Use the detector for R134a, R407C or R410A.

5 Adaptor for reverse flow check ·Attach to vacuum pump.

6 Refrigerant charge base

7 Refrigerant cylinder ·Only for R410A ·Top of cylinder (Pink)

·Cylinder with syphon

8 Refrigerant recovery equipment

specifications

. (UNF1/2)

5

3

PART NAMES AND FUNCTIONS

Indoor unit

Filter

Louver

Wireless remote controller

Air intake

Air outlet

CHECK

TEST RUN

display

CHECK and TEST RUN display indicate that
the unit is being checked or test-run.

MODEL SELECT

Blinks when model is selected.

display

Vane

display

Lights up while the signal is transmitted to
the indoor unit when the button is pressed.

display

SET TEMP. display indicates the set desired
temperature.

display

OPERATION MODE display
Operation mode display indicates which
operation mode is in effect.

display

The vertical direction of air flow is indicated.

display

FAN SPEED display indicates which fan
speed has been selected.

ON/OFF button

The unit is turned ON and OFF alternately
each time the button is pressed.

FAN SPEED SELECT button

Used to change the fan speed.

MODE SELECT button

Used to switch the operation mode between
cooling, drying, fan, heating and auto mode.

+ In case the outdoor unit is cool only type,

the heating and auto mode are not
available.

CHECK-TEST RUN button

Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation.

VANE CONTROL button

Used to change the air flow

CHECK

TEST RUN

MODEL SELECT

NOT AVAILABLE

ON/OFF TEMP

FAN

MODE

CHECK

VAN E

LOUVER

TEST RUN

RESETSET CLOCK

°C

AMPM

AMPM

AUTO STOP

AUTO START

h

min

CLOCK display

Displays the current time.

TIMER display

Displays when in timer operation or when
setting timer.

“ ” “ ” display

Displays the order of timer operation.

“ ” “ ” display

Displays whether timer is on or off.

button

SET TEMPERATURE button sets any desired
room temperature.

TIMER CONTROL buttons

AUTO STOP (OFF timer): when this switch is
set, the air conditioner will be automatically
stopped at the preset time.
AUTO START (ON timer): when this switch is
set, the air conditioner will be automatically
started at the preset time.

h and min buttons

Buttons used to set the “hour and minute” of
the current time and timer settings.

LOUVER button

Changes left/right airflow direction.

(Not available for this model.)

CLOCK button

RESET button

SET button

6

Wired remote controller

Display Section

For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.

Identifies the current operation

Shows the operating mode, etc.
*Multilanguage display is available.

“Centrally Controlled” indicator

Indicates that operation from the
remote controller has been prohib­ited by a master controller.

“Timer is Off” indicator

Indicates that the timer is off.

Temperature Setting

Shows the target temperature.

Day-of-Week

Shows the current day of the week.

Time/Timer Display

Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, the time to be
switched off is shown.

TIME SUN MON TUE WED THU FRI SAT
TIMER

AFTER

ERROR CODE

°F°C

Hr

AFTER

°F°C

ONLY1Hr.

Up/Down Air Direction indica­tor

The indicator shows the direc­tion of the outcoming airflow.

“One Hour Only” indicator

Displayed if the airflow is set to
Low or downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off in one hour,
at which time the airflow direction
also changes.

Room Temperature display

Shows the room temperature. The room
temperature display range is 8–39.
The display blinks if the temperature
is less than 8 or 39 or more.

Louver display

Indicates the action of the swing louver.
Does not appear if the louver is not
running.

(Power On indicator)

Indicates that the power is on.

ON

OFF

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

“Sensor” indication

Displayed when the remote controller
sensor is used.

“Locked” indicator

Indicates that remote controller but­tons have been locked.

“Clean The Filter” indicator

To be displayed on when it is time to
clean the filter.

Timer indicators

The indicator comes on if the corre­sponding timer is set.

Fan Speed indicator

Shows the selected fan speed.

Ventilation indicator

Appears when the unit is running in
Ventilation mode.

Operation Section

Temperature setting buttons

Down

Up

Timer Menu button
(Monitor/Set button)

Mode button (Return button)

Set Time buttons

Back

Ahead

Timer On/Off button
(Set Day button)

Opening the
lid

Note:

●

“PLEASE WAIT” message

TEMP.

MENU

BACK DAY

MONITOR/SET

PAR-21MAA

CLOCK

ON/OFF

OPERATION

ON/OFF

FILTER

CHECK

TEST

CLEAR

Built-in temperature sensor

This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.

●

“NOT AVAILABLE” message
This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as
far as any of the indoor units is equipped with the function.

ON/OFF button

Fan Speed button

Filter button
(<Enter> button)

Test Run button

Check button (Clear button)

Airflow Up/Down button

Louver button
( Operation button)

To return operation
number

Ventilation button
( Operation button)

To go to next operation
number

77

4

SPECIFICATION

4-1. Specifi cations

Service Ref.

Power source
Cooling capacity
(Nominal)

Power input
Current input

Heating capacity
(Nominal )

Power input
Current input

External finish
External dimension H × W × D

Net weight
Heat exchanger
Fan

Noise level (Low-Mid2-Mid1-High)
(measured in anechoic room)
Insulation material
Air filter
Protection device
Refrigerant control device
Connectable outdoor unit
Diameter of
refrigerant pipe

Field drain pipe size
Standard
attachment
Remarks

Type × Quantity
External
static press.
Motor type
Motor output
Driving mechanism
Airflow rate
(Low-Mid2-Mid1-High)

Liquid

(R22, R407C)

Gas

(R22, R407C)

Document
Accessory
Optional parts

*1

*1

*1

*2

*3

*3

*3

(R410A)

(R410A)

kW
kcal/h
Btu/h
kcal/h
kW
A
kW
kcal/h
Btu/h
kW
A

mm
in.
kg (lb)

Pa
mmH

2

kW

3

m

/min
L/s
cfm
dB <A>

mm (in.)

mm (in.)

mm (in.)

PKFY-P32VHM-E

PKFY-P40VHM-E

PKFY-P50VHM-E

1-phase 220-240V 50Hz, 1-phase 220V 60Hz

3.6

3,100

12,300

3,150

0.03

0.30

4.0

3,400

13,600

0.03

0.30

4.5

3,900

15,400

4,000

0.03

0.30

5.0

4,300

17,100

0.03

0.30

5.6

4,800

19,100

5,000

0.03

0.30

6.3

5,400

21,500

0.03

0.30

Plastic, MUNSELL (1.0Y 9.2/0.2)

295 × 898 × 249

11-5/8" × 35-3/8" × 9-13/16"

13 (29)

Cross fin (Aluminum fin and copper tube)

Line flow fan × 1

0

O

0

DC motor

0.030

Direct-drive

8 - 9.5 - 10.5 - 11.5
133 - 158 - 175 - 192
283 - 335 - 371 - 406

33 - 36 - 38 - 41

9 - 10 - 11 - 12
150 - 167 - 183 - 200
318 - 353 - 388 - 424

34 - 37 - 40 - 43

Polyethylene sheet

PP honeycomb

Fuse

LEV

R410A, R407C, R22 CITY MULTI
ø6.35 (ø1/4")
ø6.35 (ø1/4")
ø12.7 (ø1/2")
ø12.7 (ø1/2")

Flare
Flare
Flare
Flare

ø6.35 (ø1/4")
ø6.35 (ø1/4")
ø12.7 (ø1/2")
ø12.7 (ø1/2")

Flare
Flare
Flare
Flare

ø6.35 (ø1/4")
ø9.52 (ø3/8")
ø12.7 (ø1/2")

ø15.88 (ø5/8")

Flare
Flare
Flare
Flare

I.D. 16mm (5/8")

Installation Manual, Instruction Book

—

—

Flare nut 3/8F, 5/8F

—

Installation

Note :

Pipe length :

Level difference :

* Nominal conditions *
* Due to continuing improvement, above specification may be subject to change without notice.

*1 Nominal cooling conditions

Indoor :

Outdoor :

27°CDB/19°CWB (81°FDB/66°FWB)
35°CDB (95°FDB)

7.5 m (24-9/16 ft)
0 m (0 ft)

1, *3 are subject to JIS B8615-1.

Details on foundation work, insulation work, electrical wiring, power source switch, and other items shall be referred to the
Installation Manual.

*2 Nominal cooling conditions

27°CDB/19.5°CWB (81°FDB/67°FWB)
35°CDB (95°FDB)
5 m (16-3/8 ft)
0 m (0 ft)

*3 Nominal heating conditions

20°CDB (68°FDB)
7°CDB/6°CWB (45°FDB/43°FWB)

7.5 m (24-9/16 ft)
0 m (0 ft)

Unit converter

kcal/h = kW × 860
Btu/h = kW × 3,412

3

cfm = m
lb = kg/0.4536

*Above specification data is
subject to rounding variation.

/min × 35.31

8

Service Ref.

Power source
Cooling capacity
(Nominal)

Power input
Current input

Heating capacity
(Nominal )

Power input
Current input

External finish
External dimension H × W × D

Net weight
Heat exchanger
Fan

Type × Quantity
External
static press.
Motor type
Motor output
Driving mechanism
Airflow rate
(Low-Mid-High)

Noise level (Low-Mid-High)
(measured in anechoic room)
Insulation material
Air filter
Protection device
Refrigerant control device
Connectable outdoor unit
Diameter of
refrigerant pipe

Liquid

(R22, R407C)

Gas

(R22, R407C)
Field drain pipe size
Standard
attachment
Remarks

Document
Accessory
Optional parts

*1

*1

*1

*2

*4

*4

*3

*3

*3

(R410A)

(R410A)

kW
kcal/h
Btu/h
kcal/h
kW
A
kW
kcal/h
Btu/h
kW
A

mm
in.
kg (lb)

Pa

2O

mmH

kW

3

/min

m
L/s
cfm
dB <A>

mm (in.)

mm (in.)

mm (in.)

PKFY-P32VHM-ER1

3.6

3,100

12,300

3,150

0.04

0.40

4.0

3,400

13,600

0.03

0.30

9 - 10 - 11
150 - 167 - 183
318 - 353 - 388

34 - 37 - 41

ø6.35 (ø1/4")
ø6.35 (ø1/4")
ø12.7 (ø1/2")
ø12.7 (ø1/2")

Flare
Flare
Flare
Flare

PKFY-P40VHM-ER1

1-phase 220-240V 50Hz, 1-phase 220V 60Hz

4.5

3,900

15,400

4,000

0.04

0.40

5.0

4,300

17,100

0.03

0.30

Plastic, MUNSELL (1.0Y 9.2/0.2)

295 × 898 × 249

11-5/8" × 35-3/8" × 9-13/16"

13 (29)

Cross fin (Aluminum fin and copper tube)

Line flow fan × 1

0
0

DC motor

0.030

Direct-drive

9 - 10.5 - 11.5
150 - 175 - 192
318 - 371 - 406

34 - 38 - 41

Polyethylene sheet

PP honeycomb

Fuse

LEV

R410A, R407C, R22 CITY MULTI

ø6.35 (ø1/4")
ø6.35 (ø1/4")
ø12.7 (ø1/2")
ø12.7 (ø1/2")

Flare
Flare
Flare
Flare

I.D. 16mm (5/8")

Installation Manual, Instruction Book

—

Drain pump kit PAC-SH75DM-E

PKFY-P50VHM-ER1

5.6

4,800

19,100

5,000

0.04

0.40

6.3

5,400

21,500

0.03

0.30

9 - 10.5 - 12
150 - 175 - 200
318 - 371 - 424

34 - 39 - 43

ø6.35 (ø1/4")
ø9.52 (ø3/8")
ø12.7 (ø1/2")

ø15.88 (ø5/8")

Flare

Flare *5

Flare

Flare *5

Installation

Note :

Pipe length :

Level difference :

*4 Electrical characteristics of cooling are included optional drain-pump.
* Nominal conditions *
* Due to continuing improvement, above specification may be subject to change without notice.

*1 Nominal cooling conditions

Indoor :

Outdoor :

27°CDB/19°CWB (81°FDB/66°FWB)
35°CDB (95°FDB)

7.5 m (24-9/16 ft)
0 m (0 ft)

1, *3 are subject to JIS B8615-1.

Details on foundation work, insulation work, electrical wiring, power source switch, and other items shall be referred to the
Installation Manual.

*2 Nominal cooling conditions

27°CDB/19.5°CWB (81°FDB/67°FWB)
35°CDB (95°FDB)
5 m (16-3/8 ft)
0 m (0 ft)

99

*3 Nominal heating conditions

20°CDB (68°FDB)
7°CDB/6°CWB (45°FDB/43°FWB)

7.5 m (24-9/16 ft)
0 m (0 ft)

*5 Connect the joint (purchased locally)
for R407C/R22.

Unit converter

kcal/h = kW × 860
Btu/h = kW × 3,412

3

cfm = m
lb = kg/0.4536

*Above specification data is
subject to rounding variation.

/min × 35.31

4-2. Electrical parts specifi cations

Service Ref.

Parts name

Room temperature
thermistor

Liquid pipe thermistor

Gas pipe thermistor

Fuse
(Indoor controller board)

Fan motor

Vane motor
(with limit switch)

Linear expansion valve

Power supply terminal
block

Transmission terminal
block

MA remote controller
terminal block

Symbol

TH21

TH22

TH23
TH24

FUSE

MF

MV

LEV

TB2

TB5

TB15

PKFY-P32VHM-E

PKFY-P32VHM-ER1

PKFY-P40VHM-E

PKFY-P40VHM-ER1

PKFY-P50VHM-E

PKFY-P50VHM-ER1

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 3.15A

8-Pole Output 30W / RCOJ30-CK

MSFBC20 DC12V

DC12V Stepping motor drive

Port :3.2 (0~2000pulse)

(L, N, ) 250V 20A

(M1, M2, S) 250V 20A

(1, 2) 250V 10A

4-3. Sound levels

Measurement location

* Measured in anechoic room.

4-4. NC curves

PKFY-P32, 40VHM-E

External static pressure : 0Pa
Power source :

70.0

65.0

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

20.0

15.0

10.0

OCTAVE BAND PRESSURE LEVEL (dB) 0dB = 20MPa

63 125 250 500 1k 2k 4k 8k

220,230,240V, 50Hz / 220V, 60Hz

Approximate minimum
audible limit on
continuous noise

OCTAVE BAND CENTER FREQUENCIES(Hz)

1.0m

High speed
Low speed

1.0m

PKFY-P32, 40VHM-ER1

External static pressure : 0Pa
Power source :

70.0

MPa

65.0

NC60

NC50

NC40

NC30

NC20

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

Approximate minimum

20.0

audible limit on
continuous noise

15.0

10.0

OCTAVE BAND PRESSURE LEVEL (dB) 0dB = 20

63 125 250 500 1k 2k 4k 8k

OCTAVE BAND CENTER FREQUENCIES(Hz)

Sound level at anechoic room : Low-(Middle2-Middle1)-High

Service Ref.
PKFY-P32VHM-E
PKFY-P40VHM-E
PKFY-P50VHM-E

Service Ref.
PKFY-P32VHM-ER1
PKFY-P40VHM-ER1
PKFY-P50VHM-ER1

220,230,240V, 50Hz / 220V, 60Hz

High speed
Low speed

NC60

NC50

NC40

NC30

NC20

Sound level dB (A)

33-36-38-41

34-37-40-43

Sound level at anechoic room : Low-Middle-High

Sound level dB (A)

34-37-41
34-38-41
34-39-43

PKFY-P50VHM-E PKFY-P50VHM-ER1

External static pressure : 0Pa
Power source :

70.0

65.0

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

20.0

15.0

10.0

OCTAVE BAND PRESSURE LEVEL (dB) 0dB = 20MPa

63 125 250 500 1k 2k 4k 8k

220,230,240V, 50Hz / 220V, 60Hz

High speed
Low speed

Approximate minimum
audible limit on
continuous noise

OCTAVE BAND CENTER FREQUENCIES(Hz)

NC60

NC50

NC40

NC30

NC20

10

5

Min.7

250mm or greater with optional

drain pump installation.

Required space (Indoor unit)

Min.50

Min.220

Min.150

550mm or greater with optional

drain pump installation.

Min.250

Min.50

55mm or greater with left

or rear left pipng or drain

pump installation.

197

387

192

599

Top side

Front side

155

688

898

55

295

Front side (Grille open)

169

158

184

457 Gas pipe



539 Liquid pipe



610 Drain hose



Terminal block for power supply

Terminal block for transmission

Terminal block for

MA-remote controller

Emergency operation switch

(cooling/heating)

Under side

Vane (auto)

Operation lamp

612

DEFROST/STAND BY lamp

Receiver

Knockout hole

for lower piping

Louver (manual)

Knockout hole

for lower piping

C

8

B

Size

Refrigerant pipe : :6.35

Flared connection : 1/4F

Refrigerant pipe : :12.7

Flared connection : 1/2F

:16 O.D.



Liquid pipe



Gas pipe



Drain hose

Knockout hole

for right piping

Right side

Mount board

21.8020

32.7

53.5

66

128.5

153.5

231.5

273.2

449

281

193.5

180.3

278.3

167
140
115

0

174

213
238

394

449

253.5

232.5

203.5

178.5

166

103.5

91

78.5

116

41

28.5

16

0

372.3

356.3

327.5

291.5

265

225

200

125

70

15

0

15

70

125

200

225

265
238

291.5

327.5

372.3

356.3

Indoor unit outline

Mount board

4-:9 Bolt hole

77-:5.1

Tapping

screw hole

0

58

3.8

Center measurement hole :2.5

A

B

43

6

56
46

60

46

43

59

C

56

12.5

43

D

43

6

56

69

Knockout hole for piping

Knockout hole

for left piping

Left side

Sleeve

(purchased locally)

:65~:80

:65~:80

Through hole

249

A

5

P50VHM-E

P50VHM-ER1

:6.35 / :9.52

1/4F / 3/8F

:12.7 / :15.88

1/2F / 5/8F

P40

P32

OUTLINES AND DIMENSIONS

PKFY-P32, 40, 50VHM-E
PKFY-P32, 40, 50VHM-ER1

Unit : mm

1111

WIRING DIAGRAM6

PKFY-P32, 40, 50VHM-E
PKFY-P32, 40, 50VHM-ER1

SYMBOL

I.B INDOOR CONTROLLER BOARD

CN32
CN51
CN52
BZ
DSA SURGE ABSORBER
FUSE FUSE (T3.15AL 250V)
LED1 POWER SUPPLY (I.B)

LED2
SW2
SW3
SW4
SWE

X1 AUX.RELAY

MOV 01.02

LEV LINEAR EXPANSION VALVE
MF
MV
TB2
TB5
TB15

RED
BLU

GRN/YLW

MF

DP MV LEV

MS

M

~

~

3

1

BLU

RED

BLK

CND
(BLK)

51

WHT

BLU

YLW

CN2M(BLU)

FUSE

CNP

(

BLU

13

X1

M-NET

12

BLU

)

MOV1

DSA

U

U

DC311~339V

RECTIFICATION

SW2
ON
OFF

123456

BLU

See fig.1

RED

163

BLK

FAN
CNMF
(WHT)

NAME

CONNECTOR

BUZZER

POWER SUPPLY (I.B)
SWITCH

VARISTOR

FAN MOTOR
VANE MOTOR
TERMINAL

BLOCK

TB2

L
N

REMOTE SWITCH
CENTRALLY CONTROL
REMOTE INDICATION

CAPACITY CODE
MODE SELECTION
MODEL SELECTOR
DRAIN PUMP (TEST MODE)

DRAIN PUMP (

POWER SUPPLY
TRANSMISSION
MA-REMOTE CONTROLLER

FUSE

PULL

(

16A

)

BOX

TO NEXT

INDDOR

UNIT

M

RED

BRN

YLW

GRN

51

VANE
CN151
(WHT)

LED1

SW4

1234

ORN

SWE

OFFBZON

SW3

12345678

MOV2

SYMBOL

TH21

TH22

TH23

TH24

A.B

SWA
SW1

SW11
SW12

)

SW14 BRANCH No.

S.B SWITCH BOARD

SWE1

SWE2

W.B PCB FOR WIRELESS REMOTE CONTROLLER

LED1
LED2
RU

DP

FS

BREAKER

(

16A

)

OPTION

POWER SUPPLY
~/N220-240V 50Hz
220V 60Hz

M

331

LDSWE(A

)

(

BLU

)

BRN

CNRU
(WHT)

ADDRESS

CN81

(RED)

MA-REMOCON

CN3A

(BLU)

1

3

ORN

ORN

6

TB15

61

81

RED

BLU

LEV

CN60

(YLW)

CN32

(WHT)

31

LED2

1

2

M1

M2

S

TB5

51

WHT

YLW

ORN

1

FLOAT SW

LIQUID/GAS1

ADDRESS

CN42

(RED)

41

(SHIELD)

CN4F
(WHT)

(WHT)

THERMISTOR

ADDRESS BOARD

SWITCH

EMERGENCY OPERATION(HEAT)

EMERGENCY OPERATION(COOL)

LED(OPERATION INDICATOR: GREEN)
LED(OPERARTION FOR HEATING : ORANGE )
RECEIVING UNIT

DRAIN PUMP (OPTION)
DRAIN FLOAT SWITCH (OPTION)

6

CN52

(GRN)

51

CN51

(WHT)

CN24

(YLW)

41

GAS2

CN2G

(BLK)

CN44

41

INTAKE

CN20

(RED)

TO MA-

REMOTE
CONTROLLER
DC8.7-13V

TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V

ROOM TEMP. DETECTION
(0°C/15kΩ, 25°C/5.4kΩ)

PIPE TEMP. DETECTION / LIQUID
(0°C/15kΩ, 25°C/5.4kΩ)

PIPE TEMP. DETECTION / GAS1
(0°C/15kΩ, 25°C/5.4kΩ)

PIPE TEMP. DETECTION / GAS2
(0°C/15kΩ, 25°C/5.4kΩ)

FAN SPEED SELECTOR
MODE SELECTION

ADDRESS SETTING 1s DIGIT
ADDRESS SETTING 10ths DIGIT

LED2

I.B

21

21

21

LED1

W.B

When attaching drain
pump(option), remove
the jumper connector
CN4F and fit the drain
float switch (FS).

TH24

○

t

TH23

○

t

TH22

○

t

TH21

○

t

4

8

SW1
ON
OFF

11223345678910

0

9

8

7

6

5

10ths
DIGIT1sDIGIT

A.B

LD101(B)

RU

<fig.1> PKFY-P·VHM-E

1

9

2

8

3

7

4

NAME

LD SWE(B)

SWE1

When attaching drain pump
(option)

FLOAT SW

CN4F

(WHT)

4

Models

P32
P40
P50

ADDRESS

(RED)

0

1

2

3

4

6

5

CN43

SWA

ON

OFF

ADDRESS

SW14SW11SW12

0

1

F

E

D

C

B

A

8

9

BRANCH

No.

SW2

123456

CN82

(RED)

2

3

4

5

6

7

SWE2

S.B

1

FS

Models

P32

P40

P50

PKFY-P·VHM-ER1

SW2

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

LED on indoor board for service

Mark Meaning Function

LED1

LED2

NOTES:

1. At servicing for outdoor unit,always follow the wiring diagram of outdoor unit.

2. In case of using MA-Remote controller, please connect to TB15.
(Remote controller wire is non-polar.)

3. In case of using M-NET, please connect to TB5. (Transmission line is non-polar.)

4. Symbol [S] of TB5 is the shield wire connection.

5. Symbols used in wiring diagram above are, : terminal block, :connecter.

6. The setting of the SW2 dip switches differs in the capacity. For the detail, refer to the fig. 1.

Main power supply

Power supply for
MA-Remote controller

Main power supply (Indoor unit: 220-240V)
Power on → Iamp is lit

Power supply for MA-Remote controller
on → Iamp is lit

12

7

REFRIGERANT SYSTEM DIAGRAM

PKFY-P32, 40, 50VHM-E
PKFY-P32, 40, 50VHM-ER1

Gas pipe thermistor TH23

Gas pipe thermistor TH24

Strainer (#50mesh)

Gas pipe

Liquid pipe thermistor TH22

Heat exchanger

Linear expansion valve

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

PKFY-P50VHM-ER1

:12.7(1/2)

:6.35(1/4)

8

Room temparature thermistor TH21

Service Ref.

Item

PKFY-P32VHM-E(R1)
PKFY-P40VHM-E(R1)

Gas pipe

Liquid pipe

TROUBLESHOOTING

8-1. HOW TO CHECK THE PARTS
PKFY-P32, 40, 50VHM-E PKFY-P32, 40, 50VHM-ER1

:12.7(1/2)

:6.35(1/4)

Flare connection

Liquid pipe

Strainer (#100mesh)

Unit : mm (inch)

PKFY-P50VHM-E

:12.7(1/2)/:15.88(5/8)

:6.35(1/4)/:9.52(3/8)

Parts name Check points

Room temperature
thermistor (TH21)

Liquid pipe temperature
thermistor (TH22)

Gas

pipe temperature

thermistor (TH23 ,24)

Vane motor (MV)






Red

Yellow

Brown

Orange



M

Fan motor (MF)

Linear expansion
valve (LEV)

LEV

White

Yellow

Orange

Blue

Red

Brown

CN60

Disconnect the connector then measure the resistance using a tester.
(At the ambient temperature 10~30)

Normal

4.3k~9.6k

Measure the resistance between the terminals using a tester. (Coil temperature 25)

Green

Connect pin No.

-

Brown-Red

-

Brown-Orange

Abnormal

Open or short

Normal

Brown-Yellow

350 ± 7%

-

Brown-Green

Refer to 8-1-3.

Disconnect the connector then measure the resistance value using a tester.
(Coil temperature 20)

1
2
3
4
5
6

(1)-(5)

White-Red

Yellow-Brown

(2)-(6)

200 ± 10%

Normal

Orange-Red

(3)-(5)

Blue-Brown

Refer to the next page for the details.

Abnormal

-

Open or short

Abnormal

(4)-(6)

Open or short

13

8-1-1. Thermistor

<Thermistor Characteristic graph>

Thermistor for
lower temperature

Room temperature thermistor (TH21)
Liquid pipe temperature thermistor (TH22)
Gas pipe temperature thermistor (TH23)
(TH24)

Thermistor R

0=15k" ± 3%

Fixed number of B=3480 ± 2%
Rt=15exp { 3480(

0: 15k"

1

273+t1273

10: 9.6k"
20: 6.3k"
25: 5.4k"
30: 4.3k"
40: 3.0k"

) }

< Thermistor for lower temperature >

50

40

30

Resistance (K)

20

10

0

-20-100 1020304050
Temperature ()

8-1-2. Liner expansion valve

1 Operation summary of the linear expansion valve

• Linear expansion valve opens/closes 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

DC12V

Linear expansion valve

4

M

6

2

5

White

1

Red

3

Orange

Blue

Brown

Yellow

:4
:3

:2
:1

Brown

Red

Blue

Orange

Yellow

White

Connector(CN60)

6
5

4
3

2
1

Drive circuit

:4
:3

:2
:1

14

<Output pulse signal and the valve operation>

Output

(Phase)

{1

{2

{3

{4

Linear expansion valve operation

2

Open

Valve position (capacity)

Close

1

ON

ON

OFF

OFF

Close

A

E

B

Output

2

OFF

ON

ON

OFF

3

OFF

OFF

ON

ON

D

Open

Pulse number

4

ON

OFF

Closing a valve : 1 → 2 → 3 → 4 → 1
Opening a valve : 4 → 3 → 2 → 1 → 4
The output pulse shifts in above order.

• When linear expansion valve operation stops, all output phase
become OFF.

OFF

• At phase interruption or when phase does not shift in order, motor
does not rotate smoothly and motor will lock and vibrate.

ON

• When the switch is turned on, 2200 pulse closing valve signal will
be sent till it goes to point A in order to define the valve

position.

C

Outdoor unit R410A model : 1400 pulse
Outdoor unit R22/R407C model : 2000 pulse
Opening a valve
all the way

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

• Noise can be detected by placing the ear against the screw

driver handle while putting the screw driver tip to the linear

expansion valve.

Extra tightening (200~800 pulse)

Trouble shooting

3

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 does not close
completely.

Wrong connection
of the connector or
contact failure

Check points

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

When power is turned on, pulse signals will be output for 10
seconds. There must be some defects in the operation circuit
if the LED does not light while the signals are output or keeps
lighting even after the signals stop.

Motor will idle and make a ticking noise when the motor is
operated while the linear expansion valve is locked. This tick­ing sound is the sign of the abnormality.

Measure the resistance between each coil (white-red, yellow­brown, orange-red, blue-brown) using a tester. It is normal if
the resistance is in the range of 200 ±10%.

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

Thermistor
(Liquid pipe)

Linear
expansion
valve

It is not necessary to exchange the linear expansion valve, if
the leakage is small and not affecting normal operation.

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

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
is any leaking, detecting temperature of
the thermistor will go lower. If the detected
temperature is much lower than the tem­perature indicated in the remote controller,
it means the valve is not closed all the way.

LED1k

6
5
4
3
2
1

Countermeasures

Exchange the indoor con­troller board in case of
drive circuit failure.

Exchange the linear expan­sion valve.

Exchange the linear expan­sion valve.

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

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

15

8-1-3. DC Fan motor (fan motor/indoor controller circuit board)

Check method of DC fan motor (fan motor/indoor controller circuit board)

Notes

· High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service.

· Do not pull out the connector (CNMF) for the motor with the power supply on.
(It causes trouble of the indoor controller circuit
Self check
Symptom : The indoor fan cannot turn around.

Wiring contact check

Contact of fan motor connector (CNMF)

board and fan motor.)

Is there contact failure?

No

Power supply check (Remove the connector (CNMF))

Measure the voltage in the indoor controller circuit

TEST POINT

: VDC (between 1 (+) and 3 (-) of the fan connector): VDC DC310~340V

Yes

Wiring recovery

board.

TEST POINT : VCC (between 4 (+) and 3 (-) of the fan connector): VCC DC15V

Is the voltage normal?

Yes

Sensor signal check

No

Indoor controller board fuse check

Is the fuse normal? Replace the fuse

Replace indoor controller board.

Measure the voltage between CNMF and DC 0V
and DC 15V in the indoor controller circuit board.

Does the voltage repeat

No

DC 0V and DC 15V?

Yes

Replace indoor

controller board

Check the operation END

Replace the fan motor

Replace the fan motor

Yes

NG

No

OK

Check the operation END

NG

OK

OK

Check the operation END

NG

Replace the fan motor.

OK

Check the operation END

NG

Replace indoor controller board.

16

8-2. Function of Dip switch

PKFY-P32, 40, 50VHM-E PKFY-P32, 40, 50VHM-ER1

Switch Pole

1

2

3

4

SW1

Mode

selection

5

6

7

8

9

10

SW2

Capacity

code

1~6

switch

Function

Operation by switch

ON OFF

Thermistor<Room temperature>
position

Filter clogging detection Provide Not provide

Filter cleaning sign 2,500 hr 100 hr

Fresh air intake Not effective Not effective

Switching remote controller display

Humidifier control

Air flow set in case of heat
thermo OFF

Auto restart function Effective Not effective

Power

ON/OFF by breaker

PKFY-P·VHM-E

Models

P32
P40
P50

Built-in remote controller

+2

Thermo ON signal indication Fan output indication

Fan operation at Heating mode

Low +1 Extra low +1

Setting air flow +1 Depends on SW1-7

Effective Not effective

PKFY-P·VHM-ER1

Models

P32

P40

P50

ON

OFF

SW2

123456

Indoor unit

Thermo ON operation at
heating mode

SW2

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

Effective

timing

NOTE:

1

+

Under

suspension

SW1-7

OFF

ON

OFF

ON

+2 It is impossible to intake

Indoor controller board

Before
power
supply
ON

Remarks

Address board

<Initial setting>

ON

OFF

12345678910

SW1-8

Fan speed

OFF

Extra low

OFF

Low

ON

Setting air flow

ON

Stop

the fresh air.

SW3

Function

selection

SW4

Model

1~4

selection

Heat pump/Cool only Cooling only Heat pump

1

Not used

2

Not used

3

Vane horizontal angle Second setting +1 First setting

4

Changing the opening of linear

5

expansion valve during thermo OFF

Heating 4 degree up Not effective Effective

6

Target superheat setting

7

Target subcool

8

In case of replacing the indoor controller board, make sure to set the
switch to the initial setting, which is shown below.

ON

OFF

Effective Not effective

+2

+2

234

1

——

——

—

——

—

Indoor controller board

Under

suspension

+1 Second setting is same as

first setting.

+2 Please do not use SW3-7,8

as trouble might be caused
by the usage condition.

Indoor controller board

Before
power
supply
ON

<Initial setting>

ON

OFF

1234567 8

17

Switch

Operation by switch

Effective

timing

Remarks

SW11

1s digit

address

setting
SW12

10ths digit

address

setting

SW14

Branch

No.

Setting

J41, J42

Wireless

remote

controller

Pair No.

SW12

SW11

0

9

8

7

6

10

0

1

4

5

1

9

2

3

2

8

How to set addresses

3

7

4

6

5

Example : If address is "3", remain SW12
(for over 10) at "0", and match SW11 (for 1 to 9)

1

with "3".

Rotary Switch

SW14

F

E

D

C

B

A

How to set branch numbers SW14 (Series R2 only)

0

1

2

3

4

5

Match the indoor unit’s refrigerant pipe with

6

7

8

9

the BC controller’s end connection number.
Remain other than series R2 at "0".

Rotary switch

• To operate each indoor unit by each remote controller when installed 2 indoor
units or more are near, Pair No. setting is necessary.

(Setting

patterns

Pair No. setting is available with the 4 patterns
Make setting for J41, J42 of indoor controller board and the Pair No. of

wireless remote controller.

• You may not set it when operating it by one remote controller.
Setting for indoor unit
Cut jumper wire J41, J42 on the indoor controller board according to the

table below.

Wireless remote controller pair number:

Setting operation

1. Press the SET button (using a pointed implement). Check that the
remote controller's display has stopped before continuing.

Jumper

MODEL SELECT

flashes, and the model No. (3 digits) appears (steadily-lit).

2. Press the MINUTE button twice. The pair number appears flashing.

3. Press the temperature buttons to select the pair number to set.

4. Press the SET button (using a pointed implement).The set pair number is
displayed (steadily-lit) for 3 seconds, then disappears.

A to D).

Address board

<Initial setting>

SW12

Before

SW11

0

0

1

9

8

7

6

5

1

9

2

2

8

3

3

7

4

4

6

5

power

supply

ON

Address board

<Initial setting>

SW14

0

1

2

F

3

E

4

D

5

C

6

B

7

A

8

9

<Initial setting>

.

Under

operation

or

suspension

SET button

Pattern A

MODEL SELECT

TEMP

ON/OFF

FAN

MODE

VANE

LOUVER

CHECK

TEST RUN

RESET

CLOCK

SET

AUTO STOP

AUTO START

h

min

Pair No.

Model No.

Temperature
button

Minute
button

Setting pattern

Indoor controller
jumper wire

Pair No. of wireless
remote controller

J41 J42

A

B

C

D

—

Cut

—

Cut

—

—

Cut

Cut

0

1

2

3

Pair No.4-9 of wireless remote controller is setting pattern D.

Initial setting

—

—

—

18

8-3. TEST POINT DIAGRAM

8-3-1. Indoor controller board
PKFY-P32VHM-E PKFY-P32VHM-ER1
PKFY-P40VHM-E PKFY-P40VHM-ER1
PKFY-P50VHM-E PKFY-P50VHM-ER1

CN2M
Connect to the
terminal block (TB5)
(M-NET transmission
connecting wire)
24-30VDC (non-polar)
Power supply from

outdoor unit

SW2
Capacity setting

SW4
Model selection

SW3
Function setting

CNMF
Connect to the fan motor (MF)

1-3 : DC310~340V
4-3 : DC15V
5-3 : DC0~6V
6-3 : DC0 or DC15V (Stop)

DC7.5V (Operation)
(12VDC pluse)

FUSE

3.15A 250V

CNP
Drain pump output
(DP)
1-3 : 220-240AC

CND
Power supply for
indoor controller board
1-3 : 220-240AC

LED1
Main power supply
(Indoor unit :
220-240V)

CN151
Vane motor output
12VDC pluse

CNRU
Connect to the
wireless remote
controller board
(W.B)

LDSWE(A)
Connect to the
wireless remote
controller board
(S.B)

CN52
Remote indicator

Jumper wire J41, J42
Pair No. setting for wireless
remote controller

LED2
Power supply for
MA-Remote controller

CN3A
Connected to the termial

block (TB15)
(MA-Remote controller
connecting wire)
1 - 3 : 8.7-13V DC
(Pin1 (+))

CN32
Remote switch

CN20
Room temperature
thermistor (TH21)

CN44
Pipe temperature thermistor

1-2 : Liquid (TH22)
3-4 : Gas1 (TH23)

19

CN2G
Pipe temperature
thermistor
Gas2 (TH24)

CN4F
Drain float switch
(FS)

CN60
Liner expansion
valve (LEV) output
12VDC pluse output

CN51
Centrally control­led

LD SWE (B)
Connect to the indoor

controller board (I.B)

8-3-2. Wireless remote controller board
PKFY-P32VHM-E PKFY-P32VHM-ER1
PKFY-P40VHM-E PKFY-P40VHM-ER1
PKFY-P50VHM-E PKFY-P50VHM-ER1

LD101

Connect to the
indoor controller
board (I.B)

8-3-3. Address board
PKFY-P32VHM-E PKFY-P32VHM-ER1
PKFY-P40VHM-E PKFY-P40VHM-ER1
PKFY-P50VHM-E PKFY-P50VHM-ER1

SW1

Function setting

1234 56789

10

1

0



2



1

0

2

9

3

8

4

7

6

5



1

0

2

9

3

8

4

7

6

5

F

E

3

4

D

5

C

6

B

7

A

8

9

SW12

Address setting
10ths DIGIT

SW11

Address setting
1s DIGIT

SW14

Branch No.

20

8

DISASSEMBLY PROCEDURE

PKFY-P32VHM-E PKFY-P40VHM-E PKFY-P50VHM-E
PKFY-P32VHM-ER1 PKFY-P40VHM-ER1 PKFY-P50VHM-ER1

Be careful when removing heavy parts.

PHOTOS & ILLUSTRATIONSOPERATION PROCEDURE

1. REMOVING THE LOWER SIDE OF THE INDOOR
UNIT FROM THE INSTALLATION PLATE

(1) Remove the front panel.
(2) Insert the screw driver to the corner hole at both left and

right side as shown in the figure 1.
(3) Push it up, then pull down the lower side of indoor unit and
remove the hook.

Figure 1

Corner hole

Be careful
not to damage
the airflow
adjustment
plate with the
screw driver.

Push

Push

Down

2. REMOVING THE FRONT PANEL

(1) Press and unlock the knobs on both sides of the front
panel and lift the front panel until it is level. Pull the hinges
forward to remove the front panel. (See Photo 2)

(2) Move the horizontal vanes in a downward direction.
(3) Remove the screw caps of the panel. Remove the screws.
(See Photo 1)
(4) Hold the lower part of both ends of the panel and pull it

slightly toward you, and then remove the panel by pushing
it upward.

Photo 1

Photo 2

Vane

Front panel

Screw caps

2121

PHOTOSOPERATION PROCEDURE

3. REMOVING THE INDOOR CONTROLLER BOARD
AND WIRELESS CONTROLLER BOARD

(1) Remove the front panel. (Refer to 2.)
(2) Remove the room themp. thermistor TH21. (see Photo 3)
(3) Remove the electrical box covers (screw 4 × 12).
(See Photo 3)
(4) Disconnect the connectors on the indoor controller board.
(5) Remove the switch board cover.
(6) Pull out the indoor controller board toward you, then
disconnect the rest of connectors.
Remove the indoor controller board and switch board.
(7) Remove the holder of wireless controller board.
(8) Disconnect the connector of wireless controller board and
remove the wireless controller board from the holder.

Photo 3

Screw (top cover)

Nozzle assembly

Photo 4

Terminal
block (TB2)

Terminal
block (TB5)

Terminal
block (TB15)

Electrical box cover (top)

Screw (side cover)

Switch board cover

Indoor controller board (I.B)

Electrical box
cover (side)

Room temp.
thermistor
(TH21)

Screw
(side
cover)

Holder of wireless
controller board

4. REMOVING THE ELECTRICAL BOX

(1) Remove the front panel. (Refer to 2.)

(2) Remove the electrical box covers. (See Photo 3)
(3) Remove the nozzle assembly. (Refer to 5.)
(4) Disconnect the transmission wiring of TB5.

(5) Disconnect the power supply wiring of TB2.

(6) Disconnect the wiring of MA-remote controller (TB15).

(7) Disconnect the connectors on the indoor controller board.

(8) Disconnect the connector for the ground wire. (See Photo 5)

(9) Pull the disconnected lead wire out from the electrical box.

(

10

) Remove the screw of electrical box. (See Photo 6)

(

11

) Push up the upper fixture (See Photo 5) catch to remove

the box, then pull the right fixture (See Photo 4) and
remove it from the box fixture.

Fixture
(right)

Room temp. thermistor (TH21)

Photo 5

Connector for ground wire

Photo 6

Fixture
(right)

Fixture (upper)

22

Screw (Electrical box)

5. REMOVING THE NOZZLE ASSEMBLY (with VANE
and VANE MOTOR) AND DRAIN HOSE

(1) Remove the front panel (Refer to 2.).
(2) Remove the electrical box cover.
(3) Disconnect the vane motor connector (CN151) on the
indoor controller board.
(4) Remove the corner box.
(5) Pull the nozzle assembly and detach.
(6) Push the fixture and remove the drain hose.

6. REMOVING THE INDOOR FAN MOTOR AND THE
LINE FLOW FAN

(1) Remove the front panel (Refer to 2.) and the corner box
at right lower side.
(2) Remove the electrical box (Refer to 4.) and the nozzle

assembly (Refer to 5.).
(3) Remove the screws fixing the motor bed. (See Photo 8)
(4) Loosen the screw fixing the line flow fan. (See Photo 9)
(5) Remove the motor bed together with fan motor and motor

band.
(6) Release the hooks of the motor band. Remove the motor

band. Pull out the indoor fan motor.
(7)

Remove the screws fixing the left side of the heat exchanger.
(See Photo 10)
(8) Lift the heat exchanger, and pull out the line flow fan to the

lower-left.

Photo 7

Photo 8

Heat exchanger

Photo 9

PHOTOSOPERATION PROCEDURE

Nozzle assembly

Electrical box cover (side)

Electrical box cover (top)
Screw (side cover)
Screw (top cover)

Switch board cover

Holder of wireless
controller board

Motor band

Screw of the motor bed

Screw
(side
cover)

Fan motor

Photo 10

Screw of the
left side of the
heat exchanger

7. REMOVING THE VANE MOTOR

(1) Remove the nozzle assembly. (Refer to 5.)
(2) Remove the screws of the vane motor unit, and pull out

the vane motor unit.
(3) Remove the screws of the vane motor unit cover.
(4) Remove the vane motor from the vane motor unit.
(5) Disconnect the connector from the vane motor.

8. REMOVING THE LIQUID PIPE THERMISTOR AND
GAS PIPE THERMISTOR

(1) Remove the front panel. (Refer to 2)
(2) Remove the electrical box cover.
(3) Remove the motor band.
(4) Cut the wiring fixed band.
(5)

Remove the liquid pipe thermistor and gas pipe thermistors.
(6) Disconnect the connector (CN44) (CN2G) on the indoor
controller board. (TH22 and TH23/CN44, TH24/CN2G)

Photo 11

Screws of the vane motor unit cover

Screws of the vane
motor unit

Photo 12

Gas pipe thermistor (TH23)

Screw of the
line flow fan

Gas pipe thermistor (TH24)

23

Liquid pipe thermistor (TH22)

PHOTOSOPERATION PROCEDURE

9. REMOVING THE HEAT EXCHANGER AND LEV

(1) Remove the front panel (Refer to 2.) and the corner panel
at right lower side.
(2) Remove the electrical box (Refer to 4.) and the nozzle
assembly (Refer to 5.).
(3) Remove the motor band.
(4) Remove the pipe thermistors (Refer to 8.).
(5) Disconnect the connector (CN60) on the indoor controller
board and the connector for ground wire. (See Photo 5)
(6) Remove the screws fixing the left side of the heat
exchanger. (See Photo 9)
(7) Remove the heat exchanger with LEV.

Photo 13

Water cover

Nozzle assembly

Photo 14

Ground wire

Electrical box cover (side)

Electrical box cover (top)
Screw (side cover)
Screw (top cover)

Switch board cover

Holder of wireless
controller board

Screw
(side
cover)

LEV

10. REMOVING THE ROOM TEMPERATURE THERMISTOR

(1) Remove the front panel (Refer to 2.).
(2) Remove the electrical box cover.
(3) Remove the room temperature thermistor.
(4) Disconnect the connector (CN20) on the indoor controller
board.

NOTE: When room temp. thermistor is replaced, be sure

to use service parts No. R01 N20 202.

Photo 16

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN

Room temp. thermistor

(TH21)

Wire clip

Caution:
There is a case that room
temp. thermistor (TH21)
is fixed with electrical
box side cover screw.

Photo 15

Terminal
block (TB2)

Terminal
block (TB5)

Terminal
block (TB15)

Heat exchanger

Indoor controller board (I.B)

Fixture
(right)

Room temp. thermistor (TH21)

Fixture
(right)

Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Feb. 2009 No. OCH442 REVISED EDITION-A PDF 7
Distributed in Jul. 2008 No. OCH442 PDF 7
Made in Japan

New publication, effective Feb. 2009
Specifications subject to change without notice