Mitsubishi PKFY-P32VGM-E, PKFY-P40VGM-E, PKFY-P50VGM-E Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

July 2006

No. OC310

REVISED EDITION-A

Series PKFY

<Indoor unit>
[Model names] [Service Ref.]

PKFY-P32VGM-E

PKFY-P40VGM-E

PKFY-P50VGM-E

Wall Mounted

PKFY-P32VGM-E
PKFY-P40VGM-E
PKFY-P50VGM-E

R410A

CONTENTS

R407C

R22

Revision:

•

RoHS PARTS LIST

• Some descriptions have
been modified.

• Please void OC310.

Note:

• This manual describes only
service data of the indoor
units.

• RoHS compliant products
have <G> mark on the spec
name plate.

• For servicing of RoHS com­pliant products, refer to the
RoHS Parts List.

is added.

Indoor unit

1. SAFETY PRECAUTION···························2

2. PART NAMES AND FUNCTIONS············6

3. SPECIFICATIONS····································8

4. OUTLINES AND DIMENSIONS·············10

5. WIRING DIAGRAM·································11

6. REFRIGERANT SYSTEM DIAGRAM ····12

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

8. DISASSEMBLY PROCEDURE ··············20

9. PARTS LIST···········································23

10. RoHS PARTS LIST································25

1

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.

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

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

Use liquid refrigerant to seal 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.

Store the piping to be used during installation
indoors with keep 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.

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

Gravimeter

Unit

SAFETY PRECAUTION

CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R407C

[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] Refrigerant recharging

(1) Refrigerant recharging process

1Direct charging from the cylinder.

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

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

(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.

2

[3] Service tools

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

No. Tool name Specifications

1 Gauge manifold ·Only for R407C.

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

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

2 Charge hose ·Only for R407C.

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

3 Electronic scale
4 Gas leak detector ·Use the detector for R134a or R407C.
5 Adapter for reverse flow check. ·Attach on vacuum pump.
6 Refrigerant charge base.
7 Refrigerant cylinder. ·For R407C ·Top of cylinder (Brown)

·Cylinder with syphon

8 Refrigerant recovery equipment.

—

—

—

3

Cautions for units utilizing refrigerant R410A

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

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

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.

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.

Keep the tools with care.

If dirt, dust or moisture enter 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.

Flare tool

Electronic refrigerant
charging scale

Vacuum pump adaptor

Size adjustment gauge

Gauge manifold

Torque wrench

Gas leak detector

Charge hose

Tools for R410A

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

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

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.

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

Gravimeter

Unit

(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.)

[3] Service tools

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

No. 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 on vacuum pump.
6 Refrigerant charge base
7 Refrigerant cylinder ·Only for R410A Top of cylinder (Pink)

8 Refrigerant recovery equipment

specifications

Cylinder with syphon

. (UNF1/2)

5

2

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

MENU

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

Set Temperature 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
door.

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 preceding operation
number.

Ventilation button
(

Operation button)

To next operation number.

PART NAMES AND FUNCTIONS

● Indoor Unit
PKFY-P32VGM-E

PKFY-P40VGM-E
PKFY-P50VGM-E

Air intake

Filter

Air intake grille

Auto vane

Guide vane

Air outlet

● Wired remote controller

On the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.

● Operation buttons

6

● Display

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

˚F˚C

˚F˚C

ERROR CODE

AFTER

TIMER

TIME SUN MON TUE WED THU FRI SAT

ON
OFF

Hr
AFTER

FILTER

FUNCTION

ONLY1Hr.

WEEKLY

SIMPLE

AUTO OFF

Identifies the current operation

Shows the operating mode, etc.
* Multilanguage display is sup-

ported.

“Centrally Controlled” indicator

Indicates that operation of 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, shows the time
remaining.

“Sensor” indication

Displayed when the remote controller
sensor is used.

“Locked” indicator

Indicates that remote controller but­tons have been locked.

“Clean The Filter” indicator

Comes on when it is time to clean the
filter.

Timer indicators

The indicator comes on if the corre­sponding timer is set.

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
weak and downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off after one
hour, at which time the airflow di­rection also changes.

Room Temperature display

Shows the room temperature.

Louver display

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

(Power On indicator)

Indicates that the power is on.

Fan Speed indicator

Shows the selected fan speed.

Ventilation indicator

Appears when the unit is running in
Ventilation mode.

Caution

● Only the Power on indicator lights when the unit is stopped and power supplied to the unit.

● If you press a button for a feature that is not installed at the indoor unit, the remote controller will display the “Not Available”

message.
If you are using the remote controller to drive multiple indoor units, this message will appear only if he feature is not
present at the parent unit.

● When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indica­tion (For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappear then start the operation.

7

3

Item

V•Hz

kW
kW
kW
kW

A
A

—
mm
mm
mm

—

—

k/min

Pa

kW

—

—

[mm(in.)
[mm(in.)

[mm

dB

kg

Cooling capacity

Power

Heat exchanger

Insulator

Air filter

Fan ✕ No

Air flow W2

Pipe

dimensions

Unit drain pipe size
Noise level W2
Product weight

Exterior

(munsell symbol)

Fan motor

output

External

static pressure

Liquid

side

Gas
side

Heating capacity

F

a

n

Dimensions

Height

Width
Depth

Electric characteristic

Input

Cooling
Heating
Cooling
Heating

Current

PKFY-P32VGM-E

PKFY-P40VGM-E PKFY-P50VGM-E

Single phase 220V-230V-240V · 50Hz / 220V · 60Hz

3.6

4.0

4.5

5.0

0.07

0.07

0.32

0.32

Plastic , white : <0.70Y 8.59/0.97>

340
990
235

Cross fin (Aluminum plate fin and copper tube)

Linflow fan ✕ 1

0

0.03

Polyethylene sheet

PP honey comb

O.D.20 (PVC pipe VP-20 connectable)

16

5.6

6.3

12-11-10-9

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

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

43-40-37-34

11.5-10.5-9.5-8

12.7(1/2")

6.35(1/4")

41-38-36-33

SPECIFICATIONS

3-1. SPECIFICATION

Note 1. Rating conditions (JIS B 8615-1)

W2. Air flow and the noise level are indicated as High – Middium1 – Middium2 – Low .

Cooling :Indoor D.B. 27°C W.B. 19°C
Heating : Indoor D.B. 20°C

Outdoor D.B. 35°C
Outdoor D.B. 7°C W.B. 6°C

8

3-2. ELECTRICAL PARTS SPECIFICATIONS

Room temperature thermistor

Liquid pipe temperature thermistor

Gas pipe temperature thermistor

Fuse
(Indoor controller board)

Fan motor
(with inner-thermostat)

Fan motor capacitor

Vane motor

Linear expansion valve

Power supply terminal block

Transmission terminal block

MA remote controller terminal block

Symbol

TH21

TH22

TH23

FUSE

MF

C1

MV

LEV

TB2

TB5

TB15

PKFY-P32VGM-E

PKFY-P40VGM-E

Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ

Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ

Resistance 0°C/15kΩ, 10°C/9.6kΩ, 20°C/6.3kΩ, 25°C/5.4kΩ, 30°C/4.3kΩ, 40°C/3.0kΩ

250V 6.3A

PM4V30-K 220-240V/220V , 50/60Hz

4 pole Output 30W

OFF 125±5;

2.0µF 440V

MP 35 EA DC12V

DC12V Stepping motor drive

Port dimension [3.2 (0 ~ 2000pulse)

(L, N, ;) 330V 30A

(M1, M2, S) 250V 20A

(1,2) 250V 10A

Model

Parts name

PKFY-P50VGM-E

Inner-thermostat

9

4 OUTLINES AND DIMENSIONS

Knock out hole for right piping

Refrigerant pipe.Drain pipe.

Wiring hole

Gas pipe

Liquid pipe

Address board

Filter grip

21

21

Knock out hole for under piping

Refrigerant piping.Drain pipe.

Wiring hole

Service panel

(Power supply access)

1/2F / 5/8F

Gas pipe

1/2F

Liquid pipe

1/4F / 3/8F

1/4F

50

32 , 40

Model

( Flexible hose total length 800 )

( Right side piping

installation )

( Left side piping

installation )

Drain pipe (VP-20)

(Front view ( to open the grille ))

12 - Louvers ( manual )

Air outlet

(Lower side)

Auto vane

(Left side)

(Front view)

Air intake

Air intake

Air intake

Air intake

Knock out hole for left piping

Refrigerant pipe.Drain pipe.Wiring hole.

(Right side)

35

700 153

449 86

581 54

31

280

80

60

70

245

50

395400

190

60

70 35

160 40

705 235

Less than 15

198

70

245

60

235

53

340

715 225

340 80 280 233

990

79

Installation plate

balance point hole

49 - [5 hole

for tapping screw

Knock out hole for

right-rear piping

Right-rear

piping hole

( Necessary clearance for Unit installation )

R

5

2

.5

R52.5

R

52.5

R

52.5

Unit center

Right side

Allowing clearances

Front view

W1 Sleeves are available on the market.

W2 In case of R22 or R407C.

W3 This size shows the lower end of through hole.

[90 ~ [100

[75 ~ [80

[90

[75

Through holeSleeve w1

50 w2

32 , 40 , 50

Model

Details of installation plate

14 - [14 hole

for bolts

Left-rear

piping hole

Knock out hole for

left-rear piping

Less than 130

50 or more 150 or more

180 or more

30 or more

425

420

170

190

210
230

0

322

0355580130

190

230

272

310

0

35

95

150

205

260

320

345

495

20

75

135

190

245

300

360
405

495

32

0

w3

PKFY-P32VGM-E
PKFY-P40VGM-E
PKFY-P50VGM-E

Unit : mm

10

0

Mode selection

A.B

SW12

SW11

SW1

SW14

SW5

SWC

Option selector

Connection No.

Address setting 2nd digit

Address setting 1st digit

Voltage selection

Switch

Circuit board

(WHT)
DRAIN

CN31

54321

OFF

ON

54321

OFF

ON

SW4

ON

OFF

12345

on ➞ lamp is lit

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

LED on indoor board for service

Power supply for
MA-Remote controller

Function

Main power supply

Meaning

LED2

LED1

Mark

240V220V

SW5

1

~ 220V 60Hz

POWER SUPPLY

~ 220-240V 50Hz

FUSE(15A)

BREAKER
(15A)

PULL BOX

TO NEXT INDOOR UNIT

<fig:w1>

CONTROLLER

TO MA-REMOTE

54321

OFF

ON

678910

P40

654321

OFF

ON

Models

P32

654321

OFF

ON

SW2

54321

OFF

ON

678910

SW3

P50

ON

OFF

123456 54321

OFF

ON

678910

TH21

54321

12345678910

6

LEV

4

123456

8

ON

OFF

12345678910

SW1

SW12 SW11

A.B

00

MV

P.B

TRANS

CN2S

DC13.1V

(WHT)(RED)

AC220-240V

CNSK

X4

41

3

5151

X4

0N

SW4

0N

SW3SW2

FAN

F.C

CND

FUSE
250V

6.3A

ZNR

CN6V

CN42

CN81

0FF

0FF

I.B

C1

TB15

1
2

{

(WHT)

DC8.7-13V

(RED)

BLK

WHT

RED

BLU

RED

BLK

WHT

ORN

YLW

BLU

PIN

RED

BRN

VANE

(GRN)

ADDRESS

(RED) (RED)

ADDRESS

CN52

(GRN)
REMOTE
INDICATION

CN51

CENTRALLY
CONTROL

(WHT)

See fig:w1

BLU

RED

BRN

YLW

WHT

ORN

(WHT)
REMOTE
SWITCH

CN32

(WHT)

HA

CN41

(BLK)

GAS
CN29

(RED)

CN20

INTAKE

(WHT)
LIQUID

CN21

TH23TH22

(WHT)

LEV

CN60

CN2M

CNDK

(RED)

LED1

LED2

(BLU)

CN3A

CN2D

(WHT)

(BLU)

(M-NET)

BLK
WHT

BLU

BLU

ORN
ORN

M1

M2

S(SHIELD)

{

REMOTE CONTROLLER

DC24-30V

BC CONTROLLER

TO OUTDOOR UNIT

TB5

3RD
DIGIT

2ND
DIGIT

1ST
DIGIT

0

SW14

CONNECTION
NO.

SWC

(RED)

ADDRESS

CN82

(RED)

ADDRESS

CN43

RED
BLU

N

TB2

L

GRN/YLW

Power supply for MA-Remote controller

321

Thermistor

TH23

(0ºC/15k", 25ºC/5.4k")

Pipe temperature detection/Gas

Indoor power board

P.B

MA-Remote Controller

TB15

121221

4
3
2
1

8
7
6
5
4
3
2
1

2
1

3
2
1

13

2

1

3

1
2

31

1
2

123456

513

132

MF

123412345678561234

MV

MF

C1

Vane motor

Terminal
block

TB5

TB2

Fan motor (with inner thermo)

Power supply
Transmission

LEV

Linear expansion valve

Capacitor (fan motor)

(0ºC/15k", 25ºC/5.4k")

Pipe temperature detection/Liquid

(0ºC/15k", 25ºC/5.4k")

Room temperature detection

TH22

TH21

Thermistor

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.
(Transmisson 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:

w1.

7.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.

Note

Legend

Symbol

Name Symbol Name

NameSymbol

FUSE

F.C

Fuse (6.3A)

Fan phase control

I.B

ZNR

X4

SW3
SW4

SW2

CN52

CN51

CN41

CN32

Indoor controller board
Connector

Aux.Relay (Fan motor)
Varistor

Mode selection

Capacity code

Remote indication

Centrally control

Remote switch
HA terminal-A

Switch

Model selection

5

WIRING DIAGRAM

PKFY-P32VGM-E PKFY-P40VGM-E PKFY-P50VGM-E

11

6 REFRIGERANT SYSTEM DIAGRAM

Strainer (#50mesh)

Strainer (#100mesh)

Strainer (#100mesh)

Heat exchanger

Room temperature thermistor
TH21

Gas pipe temperature
thermistor TH23

Liquid pipe temperature
thermistor TH22

Linear expansion valve

Gas pipe

Liquid pipe

Flare connection

PKFY-P32VGM-E
PKFY-P40VGM-E
PKFY-P50VGM-E

Item

Capacity

Gas pipe
Liquid pipe

PKFY-P32VGM-E PKFY-P40VGM-E

{12.7 (1/2”)

{6.35 (1/4”)

PKFY-P50VGM-E

{12.7 (1/2”) or [15.88(5/8”)

{6.35 (1/4”) or [9.52(3/8”)

12

7

M

Blue

Brown

Yellow

Orange

Red

Pink

4

5

2

 3

6

1

TROUBLE SHOOTING

7-1. HOW TO CHECK
PKFY-P32VGM-E PKFY-P40VGM-E PKFY-P50VGM-E

Parts name

Room temperature
thermistor (TH21)

Liquid pipe temperature
thermistor (TH22)

Gas pipe temperature
thermistor (TH23)

Vane motor

Fan motor

Fan

3

Red

1

White

2

1

Black

2
3

Check method

Disconnect the connector then measure the resistance with the tester.
(Surrounding temperature 10°C~30°C)

Normal

4.3k'~9.6k'

Abnormal

Open or short

Refer to the next page for the details.

Measure the resistance between the terminals using the tester.
(Surrounding temperature 20°C~30°C)

Connector

Normal Abnormal

Brown - Yellow

Brown - Blue

Red - Orange

186' ~ 214'

Open or short

Red - Pink

Measure the resistance between the terminals using the tester.

(Surrounding temperature 20°C)

Motor terminal or

relay connector

Red - Black 141.2Ω

White - Black 131.5Ω

Normal Abnormal

Open or short

Protector

Linear expansion
valve

Blue

4

6

2

3

Orange

Brown

Yellow

1

White

M

5

Red

Disconnect the connector then measure the resistance with the tester.

(Surrounding temperature 20°C)

(1)-(5)

White-Red

Normal

(2)-(6)

Yellow-Brown

(3)-(5)

Orange-Red

(4)-(6)

Blue-Brown

Abnormal

Open or short

150' ±10%

Refer to the next
page for the details.

13

<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=3480K ± 2%

Rt=15exp { 3480( ) }

1

273+t

1

273

0: 15k'
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 open/close through stepping motor after receiving the pulse signal from the indoor controller board.

• Valve position can be changed in proportion to the number of pulse signal.

<Connection between the indoor controller board and the linear expansion valve>

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)

Controller board

DC12V

6
5

4
3

2
1

Drive circuit

[4
[3

[2
[1

14

<Output pulse signal and the valve operation>

D

A

E

B

C

Open

Extra tightning (80~100pulse)

Pulse number

2000 pulse
Opening a valve
all the way

Close

Valve position (capacity)

Liquid pipe
thermistor

Linear
expansion
valve

2

OFF

ON
ON

OFF

Output

3

OFF
OFF

ON
ON

Output

(Phase)

{1
{2
{3
{4

Linear expansion valve operation

➁

1

ON

ON
OFF
OFF

4

ON
OFF
OFF

ON

Closing a valve : 1 → 2 → 3 → 4 → 1
Opening a valve : 4 → 3 → 2 → 1 → 4

The output pulse shifts in above order.
❈ 1. When linear expansion valve operation stops, all output phase

become OFF.

2. At phase interruption or when phase does not shift in order,
motor does not rotate smoothly and motor locks and vibrates.

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

be send till it goes to

A

⁄

point in order to define the valve posi-

tion.

When the valve move smoothly, there is no noise or vibration
occurring from the linear expansion valve : however, when the
pulse number moves from ⁄

E

to ⁄Aor when the valve is locked,

more noise can be heard than normal situation.

❈ Noise can be detected by placing the ear against the screw dri-

ver handle while putting the screw driver to the linear expansion
valve.

Trouble shooting

➂

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 (thermis­tor leaking).

Wrong connection of
the connector or
contact failure.

Check points

Disconnect the connector on the controller board, then con-

nect LED for checking.

LED1T

Pulse signal will be sent out for 10 seconds as soon as the

main switch is turned on. If there is LED with lights on or
lights off, it means the operation circuit is abnormal.

Motor will idle and make ticking noise when motor is operated

while the linear expansion valve is locked. This ticking sound
is the sign of the abnormality.

Measure the resistance between the each coil (red-white,

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

controller, it means the valve is not closed all the way. It is
not necessary to exchange the linear expansion valve, if the
leakage is small and not making any trouble.

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 are some leaking, detecting tempera­ture of the thermistor will go lower. If the
detected temperature is much lower than
the temperature indicated in the remote

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 thermis­tor is leaked, exchange the
linear expansion valve.

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

15

7-2. FUNCTION OF DIPSWITCH
PKFY-P32VGM-E PKFY-P40VGM-E PKFY-P50VGM-E

Switch Pole

1
2
3
4

SW1

Mode

Selection

5
6
7
8
9

10

SW2

Capacity

code

1~6

setting

Function

Operation by switch

ON OFF

Thermistor<Intake temperature
detection>position

Filter clogging detection Provided Not provided
Filter cleaning sign 2500hr 100hr
Air intake Effective Not effective
Remote indication switching Thermostat ON signal indication Fan output indication
Humidifier control

Air flow set in case of Fix to LOW w3 Fix to EXTRA LOW w3

Heat thermostat OFF
Auto restart Effective Not effective
Power source ON/OFF Effective Not effective

Capacity SW2 Capacity SW2 Capacity SW2

ON

P32 P40

OFF

123456

Built-in remote controller

Always operated while the heating mode

Depends on setting Remote controller

ON

OFF

123456

Indoor unit

w1

Operated depends on the condition

w3 Depends on SW1-7

ON

P50

OFF

123456

w2

Remarks

Address board

<At delivery>

ON

OFF

NOTE:

12345678910

w1 At Heating mode, fan

operating.

w2 At Heating mode, operat-

ing heat thermostat ON.

w3 SW1-7=OFF, SW1-8=ON

→Setting air flow.
SW1-7=ON, SW1-8=ON
→Indoor fan stop.

Indoor controller board

Set while the unit is off.

<At delivery>

Set for each capacity.

SW3

Function

Selection

10

SW4

Unit

1~5

Selection

Heat pump/Cooling only Cooling only models Heat pump models

1

Louver Available Not available

2

Vane Available Not available

3

Vane swing function Available Not available

4

Vane horizontal angle Second setting First setting

5

Vane cooling limit angle setting

6

Indoor linear expansion

7

valve opening

Heater 4deg up Not effective Effective

8

Target Superheat setting

9

Target Sub cool setting 15degrees 10degrees

w4 Horizontal angle Down B,C

Effective Not effective

w5 9degrees 6degrees

ON

OFF

12345

Indoor controller board

Set while the unit is off.

<At delivery>

ON

OFF

NOTE:

12345678910

w4 At cooling mode, each

angle can be used only 1
hour.

w5 sw3-9 setting

P32 = OFF
P40 = ON
P50 = OFF

Indoor controller board

Set while the unit is off.

<At delivery>

ON

OFF

12345

16

Operation by switchSwitch Pole Remarks

220V 240V

220V 240V

SW11
1st digit
address

setting

SW12

2nd digit

address

setting

SW14

Connect

ion No.

setting

SW5

Voltage

Selection

Rotary switch

Rotary switch

2

SW12

0

1

9

2

8

3

7

4

6

5

10 1

SW14

0

F

E

D

C

B

A

9

SW11

1

2

3

4

5

6

7

8

Address board

Address can be set while the

unit is stopped.

0

1

9

8

7

4

6

5

Address setting should be done when

2

M-NET remote controller is being used.

3

<At delivery>

SW12

SW11

0

9

8

7

6

0

1

5

1

9

2

8

3

7

4

6

5

2

3

4

Address board

This is the switch to be used when the indoor
unit is operated with R2 series outdoor unit as
a set.

<At delivery>

SW14

0

1

2

F

3

E

4

D

5

C

6

B

7

A

8

9

Address board

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.

<At delivery>

17

7-3. TEST POINT DIAGRAM

7-3-1. Indoor controller board
PKFY-P32VGM-E
PKFY-P40VGM-E
PKFY-P50VGM-E

CN2D
Connect to the indoor
power board (CN2S)

12.5-13.7V DC (Pin11(+))

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

CN3A
Connect to the terminal block (TB15)
(MA-Remote controller connecting wire)

11

Between

to 338.7-13V DC (Pin11(+))

CN29
Pipe temperature
thermistor/Gas (TH23)

CN21
Pipe temperature
thermistor/Liquid (TH22)

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

CND
Power supply for
indoor controller board

11

Between

CNP
Drain-up machine output (DP)
Between

CNDK
Connect to the indoor power
board (CNSK)
Between

to 33220-240V AC

11

to 33220-240V AC

FUSE

6.3A 250V

11

to 33220-240V AC

LED2
Power supply for
MA-Remote controller

CN20
Room temperature
thermistor (TH21)

CN32
Connector
(Remote switch)

SW4
Model selection

CN60
Linear expansion valve
output (LEV)

CN31
Drain sensor (DS)

SW3
Mode selection

CN51
Centrally control

SW2
Capacity setting

CN52
Remote indication

FAN
Fan motor output (MF)

CN6V
Vane moter output (MV)

18

7-3-2. Indoor power board
PKFY-P32VGM-E
PKFY-P40VGM-E
PKFY-P50VGM-E

CN2S
Connect to the indoor power board (CN2D)

11

Between

33

to

12.6-13.7V DC (Pin11(+))

CNSK
Connect to the indoor controller board (CNDK)

11

Between

to 33220-240V AC

19

8

DISASSEMBLY PROCEDURE

PKFY-P32VGM-E PKFY-P40VGM-E PKFY-P50VGM-E

OPERATION PROCEDURE

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

(1) Remove the left / right corner box of the indoor unit.
(2) Hold and pull down the lower and both ends of the indoor

unit, and remove the ▼ section from the square hole.
(Refer to the figure 2.1)
Or remove the front panel and push the ▼ section down
by using alankey ,etc. from the front side.
(Refer to the figure 2.2).

(3) Unhook the top of the indoor unit from the back plate catch.

(Figure 2.2)

Square hole

2. REMOVING THE FRONT PANEL

(1) Open the front grille.
(2) Remove the terminal block cover with a screw.
(3) Remove the screw 3caps then remove the set 3screws.
(4) After removing the lower side of the front panel a little,

remove it as pulling toward upper.

Up

Down

PHOTOS & ILLUSTRATION

(Figure 1)

(Figure2.1)

(Figure 3)

Hook

Hook

Square hole

Terminal block cover

3. REMOVING THE INDOOR CONTROLLER BOARD

(1) Remove the terminal block cover.
(2) Remove the front panel. (See the photo 1)
(3) Remove the electrical parts box(2screws).
(4) Remove the electrical parts box cover(1 screw).
(5) Disconnect the connector on the indoor controller board and

remove the controller board by Pulling up the hook of the
controller case.
w To smooth works, hang the side hooks of the electrical

parts box on the hook of the motor cover.
(See the photo 3)

(Photo 1)

Front
panel

(Photo 2)

Motor cover

Electrical parts
box hook w

(Photo 3)

Front grille

Set screw

Set screw

Electrical parts
box

Set screw

Indoor control
p.c.board

20

Hook

Controller case

Electrical parts box

OPERATION PROCEDURE

4. REMOVING THE VANE MOTOR

(1) Disconnect the connector CN6V on the indoor controller

board.

(2) Remove the 2 screws of the vane motor, disconnect the

lead wire and remove the vane motor from the shaft.

(Photo 4)

Nozzle
assemble

Van motor

PHOTOS & ILLUSTRATION

Set screws

Lead wire

5. REMOVING THE THERMISTOR

(1) Removing the room thermistor TH21.

1Disconnect the connector CN20 <red> on the indoor

controller board.

2Remove the room thermistor from the holder.

(2) Removing the liquid pipe thermistor TH22.

1Disconnect the connector CN21 <white> on indoor con-

troller board.

2Remove the liquid pipe thermistor with set to the pipe.

(3) Removing the gas pipe thermistor TH23.

1Disconnect the connector CN29 <black> on indoor

controller board.

2Remove the gas pipe thermistor with set to the pipe.

6. REMOVING THE NOZZLE ASSEMBLE

(1) Disconnect the connector CN6V on the indoor controller

board.
(2) Disconnect the lead wire of the vane motor.
(3) Remove the corner cover.
(4) Pull the drain hose out from the nozzle assemble.
(5) Unhook the hook of the lower nozzle assemble and

pull the nozzle assemble toward you,then remove the

nozzle assemble by sliding it down.

(Photo 5)

Liquid
thermistor

Room
thermistor

(Photo 6)

Nozzle assemble

Hook

Gas pipe
thermistor

Electrical
parts box

Drain hose

Corner cover

7. REMOVING THE ELECTRICAL PARTS BOX

(1) Remove the terminal block cover.
(2) Remove the front panel.(See the photo 1)
(3) Disconnect the vane motor connector.
(4) Disconnect the fan motor connector from the fan motor.
(5) Remove the liquid / gas pipe thermistor.(See the photo 5)
(6) Remove the electrical parts box (2 screws).

8. REMOVING THE FAN MOTOR

(1) Remove the terminal block cover.
(2) Remove the front panel.(See the photo 1)
(3) Remove the electrical parts box.(See the photo 7)
(4) Remove the nozzle assemble.(See the photo 6)
(5) Remove the fan motor leg fixing 3 screws.
(6) Unscrew the set screws using by alankey and remove it by

sliding the fan motor to right.

(7) Remove the 4 screws and remove the motor cover from the

fan motor leg.

(Photo 7)

Liquid pipe
thermistor

(Photo 8)

Set
screw

Fan motor connector

(Photo 9)

Motor cover

Fan motor

screws

Vane motor
connector

Electrical
parts box

motor
leg

21

OPERATION PROCEDURE

9. REMOVING THE LINE FLOW FAN

(1) Remove the terminal block cover.
(2) Remove the front panel.(See the photo 1)
(3) Remove the electrical parts box.(See the photo 7)
(4) Remove the nozzle assembly.(See the photo 6)
(5) Remove the fan motor.(See the photo 8)
(6) Remove the pipe fixture with 2 screws.(See the photo 11)
(7) Remove the left / right screws of the heat exchanger and

pull the left-hand side up.

(8) Remove the 2screws by sliding it toward you remove the

fixture(fixing bearing).
w The fan motor is removable first , when the fan

removing is hard.

w When resetting the fan to the fan motor.

Locate and fix the shaft after installing the fan.

PHOTOS & ILLUSTRATION

(Photo10)

Heat exchanger

Set screws

Fixture(fixing bearing)

10. REMOVING THE HEAT EXCHANGER

(1) Remove the terminal block cover.
(2) Remove the front panel.(See the photo 1)
(3) Remove the electrical parts box.(See the photo 7)
(4) Remove the corner box.
(5) Remove the nozzle assemble.(See the photo 6)
(6) Remove the 2screws and the pipe fixture.
(7) Remove the 2screws and heat exchanger.

(Photo 11)

Set screw

Heat exchanger

Pipe fixture

Set screws

22

9

1
2
3
4
5
6
7
8

9
10
11
12
13

1
1
1
2
1
3
1
1
1
1
1
1
1

No.

Parts No.

Parts Name

Specifications

PKFY-

P32,P40,P50VGM-E

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom­mended

Q'ty

Unit

Amount

Price

R01 89Y 651
R01 07Y 092
R01 07Y 691
R01 A16 500
R01 07Y 002
R01 07Y 096
R01 85Y 304
T7W B01 294
R01 07Y 658
R01 07Y 635
R01 07Y 808
R01 07Y 623
R01 09Y 658

FRONT PANEL
VANE SLEEVE
FRONT GRILLE
AIR FILTER
AUTO VANE
SCREW CAP
ADDRESS CABLE
ADDRESS BOARD
CORNER COVER
BOX ASSEMBLY
BACK PLATE
UNDER COVER
CORNER COVER

A.B

PARTS LIST (non-RoHS compliant)

STRUCTURAL PARTS
PKFY-P32VGM-E
PKFY-P40VGM-E
PKFY-P50VGM-E

1

2

13

12

11

10

9

8

3

4

23

6

5

7

ELECTRICAL PARTS

ON/OFF

TEMP.

No.

Parts No. Parts Name

Specifications

Remarks

(Drawing No.)

Wiring
Diagram
Symbo

l

Recom­mended

Q'ty

Unit

Amount

PKFY-

P40VGM

-E

P32VGM

-E

Price

1

2

3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

1
1

1
1
1
1
1
1
1
2

10

4
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1

1

1
1
1
1
1
1
1
1
2

10

4
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1

MF

MV

TB15

TB5
TB2

C1

P.B

I.B

FUSE

TH21
TH22
TH23

LEV

P50VGM

-E

1

1

1
1
1
1
1
1
1
2

10

4
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1

2P(1,2)
3P(M1,M2,S)
3P(L,N,; )

2.0= 440V

250V 6.3A

PAR-21MAA

T7W A01 762
R01 H55 480
R01 H56 480
R01 H57 480
R01 07Y 114
R01 005 103
R01 07Y 102
R01 07Y 106
T7W A00 675
R01 07Y 524
R01 07Y 530
R01 07Y 059
R01 07Y 038
R01 09Y 038
R01 E04 223
R01 07Y 527
R01 07Y 135
R01 07Y 105
T7W 512 716
T7W E00 716
T7W A14 716
R01 588 255
R01 E02 313
T7W E34 310
T7W 520 239
R01 E26 202
R01 E28 202
R01 E34 202
R01 07Y 130
R01 E63 401

—

FAN MOTOR
HEAT EXCHANGER
HEAT EXCHANGER
HEAT EXCHANGER
LINE FLOW FAN
SLEEVE BEARING
BEARING MOUNT
BEARING SUPPORT
FAN GUARD
DRAIN PLUG
NOZZLE ASSY
ARM
GUIDE VANE
GUIDE VANE
VANE MOTOR
DRAIN HOSE
MOTOR COVER
RUBBER MOUNT
TERMINAL BLOCK
TERMINAL BLOCK
TERMINAL BLOCK
RUN CAPACITOR
POWER BOARD
CONTROLLER BOARD
FUSE
ROOM THERMISTOR

LIQUID PIPE THERMISTOR
GAS PIPE THERMISTOR
MOTOR SUPPORT
LINEAR EXPANSION VALVE
REMOTE CONTROLLER

PKFY-P32VGM-E
PKFY-P40VGM-E
PKFY-P50VGM-E

1

3

4

2

28

27

242526

23

5
6

7
8
9

10

11 13 14 15

12

24

16

1817 20

19

21

22

29

10

1
2
3
4
5
6
7
8

9
10
11
12
13

1
1
1
2
1
3
1
1
1
1
1
1
1

No.

G
G
G
G
G
G
G
G
G
G
G
G
G

RoHS

Parts No.

Parts Name

Specifications

PKFY-

P32,P40,P50VGM-E

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom­mended

Q'ty

Unit

Amount

Price

R01 E05 651
R01 08Y 092
R01 08Y 691
R01 A32 500
R01 08Y 002
R01 08Y 096
R01 A00 304
T7W E01 294
R01 08Y 658
R01 08Y 635
R01 08Y 808
R01 08Y 623
R01 10Y 658

FRONT PANEL
VANE SLEEVE
FRONT GRILLE
AIR FILTER
AUTO VANE
SCREW CAP
ADDRESS CABLE
ADDRESS BOARD
CORNER COVER
BOX ASSEMBLY
BACK PLATE
UNDER COVER
CORNER COVER

A.B

RoHS PARTS LIST

STRUCTURAL PARTS
PKFY-P32VGM-E
PKFY-P40VGM-E
PKFY-P50VGM-E

1

2

13

12

11

10

9

3

6

4

5

7

8

25

ELECTRICAL PARTS

ON/OFF

TEMP.

No.

Parts No. Parts Name

Specifications

Remarks

(Drawing No.)

Wiring

Diagram

Symbo

l

Recom­mended

Q'ty

Unit

Amount

PKFY-

P40VGM

-E

P32VGM

-E

Price

1

2

3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

RoHS

G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G

1
1

1
1
1
1
1
1
1
2

10

4
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1

1

1
1
1
1
1
1
1
1
2

10

4
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1

MF

MV

TB15

TB5
TB2

C1

P.B

I.B

FUSE

TH21
TH22
TH23

LEV

P50VGM

-E

1

1

1
1
1
1
1
1
1
2

10

4
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1

2P(1,2)
3P(M1,M2,S)
3P(L,N,; )

2.0= 440V

250V 6.3A

PAR-21MAA

T7W A02 762
R01 J34 480
R01 J35 480
R01 J36 480
R01 E22 114
R01 E04 103
R01 08Y 102
R01 08Y 106
T7W A01 675
R01 08Y 524
R01 08Y 530
R01 08Y 059
R01 08Y 038
R01 10Y 038
R01 E14 223
R01 08Y 527
R01 08Y 135
R01 08Y 105
T7W E33 716
R01 E27 246
T7W E32 716
R01 E13 255
R01 E38 313
T7W E53 310
R01 E06 239
R01 H08 202
R01 H07 202
R01 H13 202
R01 08Y 130
R01 H05 401

—

FAN MOTOR
HEAT EXCHANGER
HEAT EXCHANGER
HEAT EXCHANGER
LINE FLOW FAN
SLEEVE BEARING
BEARING MOUNT
BEARING SUPPORT
FAN GUARD
DRAIN PLUG
NOZZLE ASSY
ARM
GUIDE VANE
GUIDE VANE
VANE MOTOR
DRAIN HOSE
MOTOR COVER
RUBBER MOUNT
TERMINAL BLOCK
TERMINAL BLOCK
TERMINAL BLOCK
RUN CAPACITOR
POWER BOARD
CONTROLLER BOARD
FUSE
ROOM THERMISTOR

LIQUID PIPE THERMISTOR
GAS PIPE THERMISTOR
MOTOR SUPPORT
LINEAR EXPANSION VALVE
REMOTE CONTROLLER

PKFY-P32VGM-E
PKFY-P40VGM-E
PKFY-P50VGM-E

1

3

4

2

28

27

242526

23

5

6

7

8

9

10

11 13 14 15

12

26

16

1817 20

19

21

22

29

27

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN

cCopyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Jul. 2006 No. OC310 REVISED EDITION-A PDF 8
Distributed in Apr. 2004 No. OC310 PDF 9
Made in Japan

New publication, effective Jul. 2006
Specifications subject to change without notice