Mitsubishi PKFY-P15VBM-E, PKFY-P20VBM-E, PKFY-P20VBM-ER1, PKFY-P25VBM-E, PKFY-P25VBM-ER1 Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

R407C R22R410A

Indoor unit
[Model names] [Service Ref.]

PKFY-P15VBM-E

PKFY-P20VBM-E

PKFY-P15VBM-E
PKFY-P20VBM-E

PKFY-P20VBM-ER1

PKFY-P25VBM-E

PKFY-P25VBM-E

PKFY-P25VBM-ER1

November 2008

No. OCH418

REVISED EDITION-A

Revision:

• PKFY-P15VBM-E and PKFY-

P20/25VBM-ER1 are added
in REVISED EDITION-A.

• Some descriptions have

been modified.

• Plase void OCH418.

Note:

• This manual describes only

service data of the indoor
units.

• RoHS compliant products

have <G> mark on the spec
name plate.

INDOOR UNIT

Model name
indication

CONTENTS

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

2. SAFETY PRECAUTION

3. PART NAMES AND FUNCTIONS

4. SPECIFICATION

5. OUTLINES AND DIMENSIONS

6. WIRING DIAGRAM

7. REFRIGERANT SYSTEM DIAGRAM

8. TROUBLESHOOTING

9. DISASSEMBLY PROCEDURE

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

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

..........

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

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

........

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

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

PARTS CATALOG (OCB418)

2
6

9
11
12
14
14
21

1

TECHNICAL CHANGES

PKFY-P20VBM-E PKFY-P20VBM-ER1
PKFY-P25VBM-E PKFY-P25VBM-ER1

INDOOR CONTROLLER BOARD (I.B.) has been changed.

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 the all 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

1 Direct 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.

 Gauge manifold ·Only for R407C

 Charge hose ·Only for R407C

 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)

 Refrigerant recovery equipment

Tool name

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

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

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

·Cylinder with syphon

Specifications

—

—

—

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 collecting 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

Indoor unit

PART NAMES AND FUNCTIONS

Air intake

Filter

Grille

Louver

Vane

Air outlet

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

Wireless remote controller

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

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 direction.

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

8

4

SPECIFICATION

4-1. SPECIFICATIONS

Model

Power source
Cooling capacity
(Nominal)

Power input
Current input

Heating capacity
(Nominal )

Power input
Current input

External finish
External dimension H x W x D

Net weight
Heat exchanger
Fan

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

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

Liquid

(R22, R407C)

Gas

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

Document
Accessory
Optional parts
External LEV Box

*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

2O

kW

3

m

/min
L/s
cfm
dB <A>

mm (in.)

mm (in.)

mm (in.)

PKFY-P15VBM-E

1.7
1,450
5,800
1,500

0.04

0.20

1.9
1,600
6,500

0.04

0.20

295 × 815 × 225

11-5/8" × 32-1/8" × 8-7/8"

10 (23)

Line flow fan × 1

0
0

0.017

4.9 - 5.0 - 5.2 - 5.3
82 - 83 - 87 - 88

173 - 177 - 184 - 187

29 - 31 - 32 - 33

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")

PAC-SG95LE-E

PKFY-P20VBM-E(R1)

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

2.2
1,900
7,500
2,000

0.04

0.20

2.5
2,200
8,500

0.04

0.20

Plastic, MUNSELL (1.0Y 9.2/0.2)

295 × 815 × 225

11-5/8" × 32-1/8" × 8-7/8"

10 (23)

Cross fin (Aluminum fin and copper tube)

Line flow fan × 1

0
0

1-phase induction motor

0.017

Direct-driven by motor

4.9 - 5.2 - 5.6 - 5.9
82 - 87 - 93 - 98

173 - 184 - 198 - 208

29 - 31 - 34 - 36

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

PAC-SG95LE-E

PKFY-P25VBM-E(R1)

2.8
2,400
9,600
2,500

0.04

0.20

3.2
2,800

10,900

0.04

0.20

295 × 815 × 225

11-5/8" × 32-1/8" × 8-7/8"

10 (23)

Line flow fan × 1

0
0

0.017

4.9 - 5.2 - 5.6 - 5.9
82 - 87 - 93 - 98

173 - 184 - 198 - 208

29 - 31 - 34 - 36

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")

PAC-SG95LE-E

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, duct 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

99

4-2. ELECTRICAL PARTS SPECIFICATIONS

Model

Parts name

Room temperature
thermistor

Liquid pipe thermistor

Gas pipe thermistor

Fuse
(Indoor controller board)

Fan motor
(with thermal fuse)

Fan motor capacitor

Vane motor
(with limit switch)

Linear expansion valve

Power supply terminal
block

Symbol

TH21

TH22

TH23

FUSE

MF

C1

MV

LEV

TB2

PKFY-P15VBM-E

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

PKFY-P20VBM-E(R1) PKFY-P25VBM-E(R1)

250V 6.3A

4-Pole Output 17W / PS4V17-KB

1.5 × 440V

MSFBC20 DC12V

DC12V Stepping motor drive

Port :3.2 (0~2000pulse)

(L, N, ) 250V 20A

Transmission terminal
block

TB5

(M1, M2) 250V 10A

10

5

OUTLINES AND DIMENSIONS

PKFY-P15, 20, 25VBM-E
PKFY-P20, 25VBM-ER1

168

135

125

407.5

298

260

225

190
180
155

120

85

45

30
0
30

85

120
155

159
190

Detail of installation plate

225

260

Installation plate

balance point hole

295

328

407.5

133

159

122.5

Installation plate

0

110

35

10

27.5

40

4-4.5%40 hole

4-4.5%37 hole

5044

0

15

60

85

97.5

22.5

47.5

72.5

Emergency operation

switch <Heating>

Emergency operation

switch <Cooling>

Receiver

113

87

128

65

53

90

124

102.5

Air intake

100.614

298

235
205

175
170

10

0

0

10

12- 2.8 hole:

170

175

205

235

328

Operation lamp

DEFROST/STAND BY lamp

Piping hole : 65

87- 5.1 hole:

Knock of hole

4-:9 hole

8-: 4.3 hole

4-4.5%35 hole

225 5

Air intake

(Direction)

115

106.7

Installation plate

3

60mm or more for

left and left back piping.

Installation space

Terminal block

7

Air intake

(Direction)

Transmission

Power supply

Address board

Min 50mm

Address board

74.6

Air outlet

37.8

Air outlet

Air outlet

60

Min 22mm Min 20mm

Connection No.

Address board

Mode selection

Address setting digit

Detailed

(Direction)

110

116

Unit : mm

Max 90mm

:16mm(I.D)

1/2F(:12.7mm)

Min 100mm

Note.1 Use M10 or W3/8 screw for installation plate.

Note.2 Extension piping side.

* Address board is protected

With PL cover.

Remove the screw with driver

on the occasion of setting.

1/4F(:6.35mm)

Gas pipe

Liquid pipe

Drain pipe

Refrigerant

piping

MA-remote controller cable (accessory) to the connector.

Note.3 In case of connecting MA-remote controller, please connect

MA-remote controller (DC8.7-13V)

There is not MA-remote controller terminal block.

Connection with MA-remote controller refers to Note.3

Transmission (DC 24-30V)

Power supply (220-240V)

M1 M2

NL

The second side

Terminal block Detailed

The first side

783

815

Air intake

640

1111

295

Air intake

640

Air outlet

695

(Drain pipe total 760)

660

Gas pipe

Knockout hole of

right piping

450

Liquid pipe

520

Knockout hole for

12

R

15

R

Knockout hole for

54

Detailed figure dwg(A B C)

(Knock out hole)

504

162.5

remocon wiring

8
R

10

50

10

8

R

45 91.5

16 2.5

Knockout hole for

under piping

left piping

15

8

R

R

15

R

3

5

24.4

4510

34

Knockout hole of

remocon wiring

45

WIRING DIAGRAM6

PKFY-P20, 25VBM-E

Legend

Symbol

I.B

Indoor controller board

CN32

Connector
CN51
CN52
SW2

Switch
SW3

P. B

Indoor power board

ZNR Varistor

Fuse (6.3A 250V)

FUSE
F. C

Fan phase control

Capacitor (fan motor)

C1

MF Fan motor

W.B

SW2SW1

CNB

RU

LED1

BZ

LED2

A.B

SW5

220V 240V

SW1

ON

OFF

12345678910

SW12

0

10ths
DIGIT

SW11

1s
DIGIT

ADDRESS

0

Note

Remote switch
Centrally control

Remote indication
Capacity code
Mode selection

M

LEV

9

4

(RED)

CN43

1

8

(RED)

ADDRESS

CN82

SW14

0

1

BRANDH
No.

See fig :*1

Name

6

BRN
RED
BLU
ORN

1

YLW
WHT

4

8

I.B

Symbol
MV
LEV
TB2
TB5
TH21

TH22

TH23

A.B

6

11

CN60

LEV

(WHT)

ON

OFF

123456789

1515

CN5V
VANE
(BLU)

CN52CN51

10

5

9

56

SW2SW3

1234

Vane motor
Linear expansion valve
Terminal

block
Thermistor

Address board

Switch

SW1

RED

1

WHT(PNK)

BLU

M

ORN
YLW

5

141 8

CN42

ADDRESS

(RED)

CN90

WIRELESS

(WHT)

CN32

MV

91

CN81

ADDRESS

(RED)

14

13

CN41

CN35M

Name

Power supply

Transmission

Room temp.detection

(0/15k,25/5.4k)

Pipe temp.detection/liquid

(0/15k,25/5.4k)

Pipe temp.detection/Gas

(0/15k,25/5.4k)

Mode selection

TH23 TH22

t° t° t°

CN29

GAS

(BLK)

13

(BLU)

2

112

CN21

LIQUID

(WHT)

ORN

ORN

13

CN3A
MA­REMOCON

(BLU)

5

CN53M

(RED)

INTAKE

1

TH21

12

CN20

(RED)

LED2

Symbol

SW5

Switch
SW11
SW12
SW14

W.B

Wireless remote controller board

Receving unit

RU

Buzzer

BZ
LED1 LED (Operation indicator: Green)

LED (Preparation for heating: Orange)

LED2
SW1

Emergency operation (Heat)
Emergency operation (Cool)

SW2

TO MA-REMOTE
CONTROLLER
DC8.7-13V

1

M

1~

MF

13

CN35P

(BLU)

LED1

P.B

TO OUTDOOR UNIT
BC CONTROLLER
M-NET REMOTE CONTROLLER
DC24-30V

M1 M2

2

BLU

FAN

(GRN)

12

CN2M

M-NET

(BLU)

5

1

CN53P
(RED)

F.C

TB5

BLU

WHT

146

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

2. In case of connecting MA-remote controller, please connect MA-remote controller cable in an accessory

to the connector . (Remote controller wire is non-polar.)

12

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

4. Symbols used in wiring diagram above are, : terminal block, : connector

5. The setting of the SW2 dip switches differs in the capacity. For the detail, refer to the fig :*1.

6. Please set the switch SW5 according to the power supply voltage.

Set SW5 to 240V side when the power supply is 230 and 240 volts.

When the power supply is 220 volts, set SW5 to 220V side.

Name
Voltage selection
Address setting 1s digit
Address setting 10ths digit
Connection No.

TB2

L
N

GRN /YLW

RED

C1

ZNR

RED

BLK

BLU

BREAKER

13

CND

(RED)

FUSE
250V

6.3A

U

(16A)

~/N 220-240V 50Hz
~/N 220V 60Hz

TO NEXT
INDOOR UNIT

POWER SUPPLY

PULL
BOX

FUSE
(16A)

LED on indoor board for service

Mark Meaning

Main power supply

LED1

Power supply for

LED2

MA-Remote controller

MODELS SW2

ON

P20

OFF

1234

Function

Main power supply (indoor unit:220-240V)
power on lamp is lit

Power supply for MA-Remote controller
on lamp is lit

<*1>

MODELS SW2

ON

P25

OFF

1234

12

PKFY-P15VBM-E
PKFY-P20, 25VBM-ER1

Legend

Symbol

I.B

CN32
CN51
CN52
SW2
SW3

P. B

Indoor controller board
Connector

Switch

Indoor power board

Name

Remote switch
Centrally control

Remote indication
Capacity code

Mode selection

ZNR Varistor

Fuse (T6.3AL 250V)

FUSE

F. C

Fan phase control
Capacitor (Fan motor)

C1

MF Fan motor

M

LEV

W.B

SW2SW1

RU

LED2

LED1

9

CNB

BZ

6

YLW

WHT

ORN

11

CN60

LEV

(WHT)

A.B

SW5

220V 240V

SW1

ON

OFF

12345678910

SW12

SW11

0

10ths

1s

DIGIT

DIGIT

Note

0

(RED)

ADDRESS

CN43

(RED)

ADDRESS

CN82

SW14

BRANCH
No.

4

1

8

0

1

See fig :*1

4

8

ON

OFF

123456789

I.B

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

2. In case of using MA-remote controller, please connect MA-remote controller cable in an accessory

to the connector . (Remote controller wire is non-polar.)

12

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

4. Symbols used in wiring diagram above are, : terminal block, : connector

5. The setting of the SW2 dip switches differs in the capacity. For the detail, refer to the fig :*1.

6. Please set the switch SW5 according to the power supply voltage.

Set SW5 to 240V side when the power supply is 230 and 240 volts.

When the power supply is 220 volts, set SW5 to 220V side.

BLU

RED

BRN

1515

CN5V
VANE
(BLU)

CN52CN51

10

Symbol
MV
LEV
TB2
TB5
TH21

Vane motor
Linear expansion valve
Terminal

block
Thermistor

TH22

TH23

A.B

5

9

SW2SW3

1234

Address board
Switch

SW1

RED

1

WHT
BLU
ORN
YLW

5

56

CN90

WIRELESS

(WHT)

141 8

CN42

ADDRESS

(RED)

CN32

Name

Power supply
Transmission
Room temp.detection

(0/15k,25/5.4k)

Pipe temp.detection/Liquid

(0/15k,25/5.4k)

Pipe temp.detection/Gas

(0/15k,25/5.4k)

Mode selection

M

TH23 TH22

MV

t° t° t°

112

CN29

(BLK)

14

CN41

13

CN35M

(BLU)

2

GAS

MA­REMOCON

5

CN53M

CN21

LIQUID

(WHT)

ORN

13
CN3A

(BLU)

(RED)

ORN

1

91

CN81

ADDRESS

(RED)

13

TH21

12

CN20

INTAKE

(RED)

LED2

TO MA-REMOTE
CONTROLLER
DC8.7-13V

1

M

1~

MF

13

CN35P

(BLU)

5

1

LED1

P.B

Symbol

SW5
SW11
SW12
SW14

W.B

RU
BZ

Switch

Wireless remote controller board
Receving unit
Buzzer

Name
Voltage selection
Address setting 1s digit
Address setting 10ths digit
Connection No.

LED1 LED (Operation indicator: Green)

LED (Preparation for heating: Orange)

LED2
SW1

Emergency operation (Heat)
Emergency operation (Cool)

SW2

TO OUTDOOR UNIT
BC CONTROLLER
M-NET REMOTE CONTROLLER
DC24-30V

RED

13

TB2

L
N

GRN /YLW

BREAKER
(16A)

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

2

CN53P
(RED)

12

CN2M

M-NET

(BLU)

M1 M2

BLU

FAN

(GRN)

F.C

TB5

BLU

WHT

146

RED

ZNR

BLK

BLU

CND

(RED)

C1

FUSE

250V

6.3A

U

TO NEXT
INDOOR UNIT

PULL
BOX

FUSE
(16A)

LED on indoor board for service

Mark Meaning

Main power supply

LED1

Power supply for

LED2

MA-Remote controller

MODELS SW2

ON

P15

OFF

1234

Function

Main power supply (indoor unit:220-240V)
power on lamp is lit

Power supply for MA-Remote controller
on lamp is lit

MODELS SW2

ON

P20

OFF

1234

1313

MODELS SW2

ON

P25

OFF

1234

<*1>

7

REFRIGERANT SYSTEM DIAGRAM

PKFY-P15VBM-E
PKFY-P20VBM-E(R1)
PKFY-P25VBM-E(R1)

Models

Gas pipe

8

Item

Liquid pipe

TROUBLESHOOTING

Gas pipe temperature thermistor
TH23

Liquid pipe temperature thermistor
TH22

Heat exchanger

Room temperature thermistor
TH21

Strainer
(#100mesh)

Linear expansion

valve

Unit: mm(inch)

PKFY-P15VBM-E PKFY-P20VBM-E(R1) PKFY-P25VBM-E(R1)

{12.7 (1/2”)

{6.35 (1/4”)

Gas pipe

Strainer
(#100mesh)

Liquid pipe

Strainer
(#100mesh)

Flare

8-1. HOW TO CHECK THE PARTS
PKFY-P15VBM-E PKFY-P20VBM-E(R1) PKFY-P25VBM-E(R1)

Parts name Check points

Room temperature
thermistor (TH21)

Liquid pipe temperature
thermistor (TH22)

Gas

pipe temperature

thermistor (TH23)

Vane motor (MV)

4

Orange

Pink or

2

White
Red

1

Connect pin No.

Ye l l o w

M

5 3

Fan motor (MF)

FAN

White

1

Red

4

Black

6

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

Abnormal

Open or short

Refer to the next page for the details.

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

Blue

Normal Normal

-

Red-Pink or White

Red-Blue

-

Red-Orange

400 7%

-

-

Red-Yellow

Abnormal

Open or short

Measure the resistance between the terminals using a tester. (At the ambient temperature 20)

Abnormal

Open or short

White-Black

Red-Black

Normal

286
200

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

1
2
3
4
5
6

(1)-(5)

White-Red

Yellow-Brown

(2)-(6)

Normal

Orange-Red

150 10%

(3)-(5)

(4)-(6)

Blue-Brown

Abnormal

Open or short

14

<Thermistor Characteristic graph>

Thermistor for
lower temperature

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

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

Rt=15exp { 3480( ) }

1

273+t

0: 15k'

1

273

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 -10 0 10 20 30 40 50

Temperature ()

Linear 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)

Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color of

the lead wire.

6

5

4

3

2

1

Drive circuit

:4

:3

:2

:1

1515

<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

OFF

OFF

ON

ON

D

Open

Pulse number

3

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)

Troubleshooting

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 doesn't close
completely.

Wrong connection
of the connector or
contact failure

Check points

Disconnect the connector on the controller board, then con-

nect LED for checking.

When power is turned on, pulse signals will 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, yellow-

brown, orange-red, blue-brown) using a tester. It is normal if
the resistance is in the range of 150" ±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 con-

nector.

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 at drive circuit
failure.

Exchange the linear expan­sion vale.

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.

16

8-2. FUNCTION OF DIP SWITCH
PKFY-P15VBM-E PKFY-P20VBM-E(R1) PKFY-P25VBM-E(R1)

Switch

Pole

SW1

Mode

selection

10

SW2

Capacity

code

1~4

switch

Function

Operation by switch

ON OFF

Thermistor<Intake temperature>

1

position

Filter clogging Provide Not provide

2

Filter sign indication 2,500 hr 100 hr

3

Air intake Not effective Not effective

4

Remote indication switching Thermo ON signal indication Fan output indication

5

Humidifier control

6

7

Air flow set in case of heat
thermo OFF

8

Auto restart function Effective Not effective

9

Power ON/OFF Effective Not effective

MODEL SW2

PKFY-P15VBM-E

PKFY-P20VBM-E

PKFY-P25VBM-E

Built-in remote controller

+2

Fan operation at Heating mode

Low +1

Setting air flow +1 Depends on SW1-7

ON

OFF

1234

ON

OFF

1234

ON

OFF

1234

Indoor unit

Thermo ON operation at
heating mode

Extra low +1

Effective

timing

NOTE:

1

+

Under

suspension

SW1-7

OFF

ON

OFF

ON

+2 It is impossible to intake

the fresh air.

Indoor controller board

Before
power

Set for each capacity.

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

<Initial setting>

SW3

Function

selection

10

Heat pump/Cool only Cooling only Heat pump

1

Louver

2

Vane

3

Vane swing

4

Vane horizontal angle Second setting First setting

5

Vane cooling limit angle setting

6

Changing the opening of linear

7

expansion valve

Heating 4 degree up Not effective Effective

8

Superheat setting temperature

9

Subcool setting temperature

Available Not available

Horizontal angle Down B,C

+1

Effective Not effective

+2

—

+2

— —

—

—

+3

—

—

—

Indoor controller board

Under

suspension

+1 At cooling mode, each angle

can be used only 1 hour.

+2 Please do not use SW3-9,10

as trouble might be caused
by the usage condition.

+3 Second setting is the same

as first setting.

<Initial setting>

ON

OFF

123456789 10

17

Operation by switch Switch Remarks

Effective

timing

SW11

1s digit

address

setting

SW12

10ths digit

address

setting

SW14

Branch

No.

Setting

SW5

Voltage

selection

Rotary switch

Rotary switch

2

SW12

0

9

8

7

6

10

220V

1

2

3

4

5

SW14

F

E

D

C

B

A

0

1

8

9

SW11

9

8

7

6

1

2

3

4

5

6

7

0

1

2

How to set address

3

4

5

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

How to set branch number SW14 (Series R2 only)
Match the indoor unit’s refrigerant pipe with the BC
contoller’s end connection number
Remain other than series R2 at "0".

240V

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

Before

power

supply

ON

Address board

<Initial setting>

SW12

SW11

0

0

1

9

8

7

6

5

1

9

2

2

8

3

4

3

7

4

6

5

Address board

<Initial setting>

SW14

0

1

2

F

3

E

4

D

5

C

6

B

7

A

8

9

Address board

<Initial setting>

220V

240V

J41, J42

Wireless

remote

controller

Pair No.

• 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

A to D).

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
Jumper wire J41, J42 on the indoor controller board are cut according to

the table below.

Wireless remote controller pair number:

Setting operation

1. Press the SET button (using a pointed implimaent). Check that the

Jumper

remote controller’s display has stopped before continuing.
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 implemet). The set pair number is

displayed (steadily-lit) for 3 seconds, then disappears.

Indoor controller

Setting pattern

jumper wire

J41 J42

A

B

C

D

—

Cut

—

Cut

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

—

—

Cut

Cut

Pair No. of wireless
remote controller

0

1

2

3

Initial setting

—

—

—

<Initial setting>

Pattern A

.

Pair No.

Under

operation

or

suspension

SET button

MODE

CHECK

TEST RUN

MODEL SELECT

ON/OFF

SET

FAN

VANE

LOUVER

RESET

CLOCK

TEMP

AUTO STOP

AUTO START

h

min

Model No.

Temperature
button

Minute
button

18

8-3. TEST POINT DIAGRAM

8-3-1. Indoor controller board
PKFY-P15VBM-E
PKFY-P20VBM-E(R1)
PKFY-P25VBM-E(R1)

CN5V
Vane motor output
(MV)

CN60
Linear expansion valve
output (LEV)

CN81
Connected to the
address board (CN82)

CN90
Connected to the wireless
remote controller board (W.B)

CN29
Pipe temperature
thermistor/Gas (TH23)

CN21
Pipe temperature
thermistor/Liquid (TH22)

CN42
Connected to the

address board (CN43)

CN51
Centrally control

CN52
Remote indication

SW3
Mode selection

J41, J42
Wireless remote controller
Pair No. setting

JP105
Model setting

SW2
Capacity setting

CN3A
Connected to the
MA-Remote controller
Between 1 to 3 8.7-13V DC
(Pin1 (+))

CN20
Room temperature
thermistor (TH21)

CN41
Connector
(HA terminal-A)

CN32
Connector
(Remote switch)

LED2
Power supply for
MA-Remote controller

CN35M
Connected to the indoor
power board (CN35P)

19

CN53M
Connected to the indoor power board (CN53P)
Between 1 to 2 24-30V DC (non-polat)
Between 3 to 5 12.5-13.7V DC (Pin3 (+))
Between 4 to 5 11.5-12.7V DC (Pin4 (+))

8-3-2. Indoor power board
PKFY-P15VBM-E
PKFY-P20VBM-E(R1)
PKFY-P25VBM-E(R1)

CN2M
Connected to the terminal block (TB5)
(M-NET transmission connecting wire)
24-30V DC (non-polar)

CN35P
Connected to the indoor controller board
(CN35M)

CN53P
Connected to the indoor controller board
(CN53M)
Between 1 to 2 24-30V DC (non-polat)
Between 3 to 5 12.5-13.7V DC (Pin3 (+))
Between 4 to 5 11.5-12.7V DC (Pin4 (+))

FAN
Fan motor output (MF)

CND
Power supply for
indoor controller board
Between 1 to 3 220-240V AC

FUSE

6.3A 250V

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

8-3-3. Address board
PKFY-P15VBM-E
PKFY-P20VBM-E(R1)
PKFY-P25VBM-E(R1)

SW1

Function setting

1234 56789



1

0

2

9

3

8

4

7

6

5

10

1

0



2



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

20

9

DISASSEMBLY PROCEDURE

PKFY-P15VBM-E PKFY-P20VBM-E(R1) PKFY-P25VBM-E(R1)

Be careful when removing heavy parts.

PHOTOS & ILLUSTRATIONSOPERATION PROCEDURE

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

When there is removing plate
(1) Remove the corner box at right lower side of the indoor
unit and remove the removing plate from the corner box.
(Figure 3)
(2) Insert the removing plate at the back side of the corner
box to remove the indoor unit.
(3) Remove the hook by pulling the lower side of the indoor
unit down as shown in the Figure 1.

When there is no removing plate or it cannot be used for

some reason.
(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 2.
(3) Push it up, then pull down the lower side of indoor unit and
remove the hook.

Figure 1 Figure 2

Indoor unit
removing plate



Insert
the edge

Figure 3

Pull

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

Push

Corner hole

Push

Down

2. REMOVING THE FRONT PANEL

* Before removing the front panel, leave the open space at

upper side of the vane approximately 2 to 3 cm.

(1) Remove the 3 screw caps then remove the 3 set screws.
(Refer to the Photo 1)

(2) Remove the grille.
(3) Remove the left side of the front panel, then right side.
(4) After removing the lower side of the front panel a little,

remove it as pulling the upper side toward you.

* Please pay attention to the nozzle assembly.

INSTALLING THE FRONT PANEL
(1) Insert the lower side of the front panel under the vane.
(2) Set the upper side of the front panel. (Figure 4)
(3) Set the lower side of the front panel then fix it with the

screws.
(4) Press the area indicated as arrow sign and set it to the air
conditioner unit.
(5) Attach the screw caps.

Photo 1

Front panel

Figure 4

Corner box

Set screws

(4) Push

Grille

Van e

(2)

2121

(3)

OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS

PHOTOS & ILLUSTRATIONSOPERATION PROCEDURE

3. REMOVING THE INDOOR CONTROLLER BOARD AND
INDOOR POWER BOARD

(1) Remove the front panel. (Refer to 2)
(2) Remove the electrical box cover (screw 4 × 10).
(Refer to the Photo 2)

INDOOR CONTROLLER BOARD
(1) Disconnect the following connectors on the indoor
controller board.
(connector in front of)
CN60, CN5V, CN90, CN29, CN21
CN42, CN81, CN3A, CN20
(2) Pull out the indoor controller board toward you, then
disconnect the rest of connectors.
CN53M, CN35M (See the Photo 3)

INDOOR POWER BOARD
(1) Disconnect the following connectors on the indoor power

board.
FAN, CN53P, CN35P, CN2M, CND
(2) Remove the earth wire for TAB1.
(3) Pull out the indoor power board toward you.
(See the Photo 3)

Photo 2

Photo 3

Coil cover
fixing screw

Coil cover

Electrical box cover

Screw

Electrical box

Indoor controller board

Indoor power
board

Terminal block
(TB5)

Room tempera­ture thermistor
cover

4. REMOVING THE ELECTRICAL BOX

(1) Remove the front panel. (Refer to 2)
(2) Remove the electrical box cover. (See the Photo 2)

(3) Pull the nozzle assembly toward you as opening the catch

of the nozzle assembly. (See the Photo 5)
(4) Disconnect the indoor/outdoor transmission wiring of TB5.
(5) Disconnect the power supply wiring of TB2.
(6) Disconnect the relay connector of MA-remote controller.
(7) Disconnect the following connector on the indoor controller

board.
CN60, CN5V, CN29, CN21, CN90, (CN3A)
(8) Disconnect the connector (FAN) on the indoor power board.
(9) Remove the ground wire fixing screw.
(10) Pull the disconnected lead wire out from the electrical box.
(11) Push up the upper fixture catch to remove the box, then
pull the lower fixture and remove it from the box fixture.

Terminal block (TB2)

Photo 4

Linear expansion valve

Liquid pipe temp.
thermistor (TH22)

Gas pipe temp.
thermistor (TH23)

Indoor controller board

Indoor power
board

MA-remote
controller
connector

Terminal block
(TB5)

Terminal block
(TB2)

Ground wire set screw

22

5. REMOVING THE NOZZLE ASSEMBLY AND DRAIN HOSE

(1) Remove the front panel (Refer to 2).
(2) Remove the electrical box cover.
(3) Disconnect the connector (CN5V) on the indoor controller
board.
(4) After unhook the right side of the corner box, press the

upper left side and remove the corner box.

(5) Remove the nozzle assembly from the fixture.

(See the Photo 5)

(6) Remove the drain hose.

PHOTOS & ILLUSTRATIONSOPERATION PROCEDURE

Photo 5

fixture

Heat exchanger

Nozzle assembly

Electrical box

Drain hose

Drain hose

fixture

6. REMOVING THE LINE FLOW FAN AND THE FAN MOTOR

(1) Remove the front panel. (Refer to 2)
(2) Remove the nozzle assembly. (Refer to 5)
(3) Remove the electrical parts box.
(4) Remove the fixture while pressing the right side of motor

fixture catch. (See the Photo 6)
(5) Remove the left side of the motor fixture.
(6) Loosen the screw which fixes the line flow fan to the fan

motor, then remove the fan motor by sliding it to the right

side. (See the Photo 6)
(7) Pull the left-hand side of the heat exchanger toward you.

(See the Photo 7)
(8) Remove the line flow fan.

7. REMOVING THE VANE MOTOR

(1) Remove the front panel.
(2) Remove the screw of the electrical parts box cover, and
remove the cover.
(3) Remove the 2 screws of the vane motor.
Disconnect the relay connector and remove the motor
from the shaft.
(4) Disconnect the vane motor connector (CN5V) on the indoor

controller board.

Heat exchanger

Photo 6

Line flow fan

set screws

Photo 7

Heat exchanger
fixture (left)

Photo 8

Heat exchanger

Vane motor

Vane motor fixing
screws

Fan motor

fixture (right)

fixture (left)

fixture set screws

Drain hose

Nozzle assembly

Heat exchanger

Nozzle assembly

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 coil cover.
(4) Cut the wiring fixed band.
(5) Remove the liquid pipe thermistor and gas pipe thermistor.

(See the Photo 9)
(6) Disconnect the connector (CN29) (CN21) on the indoor
controller board.

23

Photo 9

Gas pipe
thermistor

Heat exchanger

Liquid pipe thermistor

Electrical box

TM

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

cCopyright 2007 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Nov. 2008 No. OCH418 REVISED EDITION-A PDF 7
Distributed in May 2007 No. OCH418 PDF 9
Made in Japan

New publication, effective Nov. 2008
Specifications subject to change without notice