Mitsubishi PFFY-P20VKM-E(R1), PFFY-P25VKM-E(R1), PFFY-P32VKM-E(R1), PFFY-P40VKM-E(R1) Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

November 2008

No. OC404

REVISED EDITION-A

Series PFFY

Indoor unit [Model names] [Service Ref.]

PFFY-P20VKM-E

Floor Standing

PFFY-P20VKM-E PFFY-P20VKM-ER1

PFFY-P25VKM-E

PFFY-P25VKM-E PFFY-P25VKM-ER1

PFFY-P32VKM-E

PFFY-P32VKM-E PFFY-P32VKM-ER1

PFFY-P40VKM-E

PFFY-P40VKM-E PFFY-P40VKM-ER1

INDOOR UNIT

Indication of model name

R410A

CONTENTS

1. TECHNICAL CHANGES

2. SAFETY PRECAUTION

3. PART NAMES AND FUNCTIONS

4. SPECIFICATION

5. NOISE CRITERIA CURVES

6. AIR OUTLET SELECTION

7. OUTLINES AND DIMENSIONS

8. WIRING DIAGRAM

9.

REFRIGERANT SYSTEM DIAGRAM

10. TROUBLE SHOOTING

11. DISASSEMBLY PROCEDURE

12. RoHS PARTS LIST

R407C

Revision:

• PFFY-P20/25/32/40 VKM-ER1 are added in REVISED EDITION-A.

• Some descriptions have been modified.

• Please void OC404.

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R22

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......

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2

2 6 8

10

11 12 13 14 15 23 28

NOTE:

This service manual describes technical data of the indoor units.

• As for outdoor units refer to outdoor unit’s service manual.

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

1

PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1

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

TEHNICAL CHANGES

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 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 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 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.

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

2

[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)

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

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.

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 enter 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 enter, 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 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.

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 on 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

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

Louver

Air outlet

Air inlet

Vane

Filter

Damper

Air outlet

Louver

Wired remote controller

Once 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.

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.

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 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.

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

Comes 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.

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 every unit connected.

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.

For the PFFY-P VKM series, the airflow direction displayed on the remote controller is different from the actual airflow direc-

tion. Refer to the following table.

123 4

(Horiz.) Swing

Display

1234

(Horiz.) Swing

Actual

The airflow direction for the lower air outlet damper cannot be set. The airflow direction is automatically controlled by a com-

puter.

77

4

SPECIFICATION

4-1. Specification

Item

Power source 1-phase 220-240V 50Hz

Cooling capacity kW 2.2 2.8 3.6 4.5

Heating capacity kW 2.5 3.2 4.0 5.0

Power Cooling kW 0.025 0.025 0.025 0.028

consumption Heating kW 0.025 0.025 0.025 0.028

Current

Dimension Width mm 700 700 700 700

Weight kg 15 15 15 15

Heat exchanger Cross fin (Aluminum plate fin and copper tube

Fan

Motor

Air filter PP honeycomb fabric (Catechin air filter)

Refrigerant

pipe dimension

Field drain pipe size :mm I.D.16(PVC pipe VP-16 connectable

Noise level *2 dB(A

Cooling A 0.20 0.20 0.20 0.24

Heating A 0.20 0.20 0.20 0.24

Height mm 600 600 600 600

Depth mm 200 200 200 200

Type Line flow fan % 2

Airflow rate *2 m

External static

pressure

Type DC motor

Output kW 0.03 % 2

Gas (Flare)

Liquid (Flare)

3

Pa 0

:mm :12.7

:mm :6.35

PFFY-P20VKM-E

PFFY-P20VKM-ER1

/min 5.9-6.8-7.6-8.7 6.1-7.0-8.0-9.1 6.1-7.0-8.0-9.1 8.0-9.0-9.5-10.7

)

27-31-34-37 28-32-35-38 28-32-35-38 35-38-42-44

PFFY-P25VKM-E

PFFY-P25VKM-ER1

PFFY-P32VKM-E

PFFY-P32VKM-ER1

)

PFFY-P40VKM-E

PFFY-P40VKM-ER1

)

Note 1. Rating conditions (JIS B 8616) Cooling : Indoor : D.B. 27°C W.B. 19.0°C outdoor : D.B. 35°C Heating : Indoor : D.B. 20°C outdoor : D.B. 7°C W.B. 6°C *2. Air flow and the noise level are indicated as High-Medium1-Medium2-Low.

8

4-2. Electrical parts specifications

Model

Parts name

Thermistor (Room temperature detection) Thermistor (Pipe temperature detection/Liquid) Thermistor (Pipe temperature detection/Gas)

Fuse (Indoor controller board)

Fan motor (Upper)

Fan motor (Lower)

Vane motor

Damper motor

Linear expansion valve [coil]

Power supply terminal block

Symbol

TH21

TH22

TH23

FUSE

MF1

MF2

MV1

MV2

LEV

TB2

PFFY-P20VKM-E

PFFY-P20VKM-ER1

Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k

DC12V Stepping motor drive Port dimension

PFFY-P25VKM-E

PFFY-P25VKM-ER1

250V 6.3A

OUTPUT 30W

ARW40Z8P30MS

OUTPUT 30W

ARW40Y8P30MS

MP20Z DC12V

MP35EA

DC12V

EFM-40YGME

(L, N, ) 330V 30A

PFFY-P32VKM-E

PFFY-P32VKM-ER1

:

5.2 (0~2000 pulse)

PFFY-P40VKM-E

PFFY-P40VKM-ER1

Transmission terminal block

TB5

(M1, M2, S) 250V 20A

99

5

NOISE CRITERIA CURVES

PFFY-P20VKM-E PFFY-P20VKM-ER1

FAN SPEED

High

Test conditions, Cooling : Dry-bulb temperature 27Wet-bulb temperature 19

Heating : Dry-bulb temperature 20Wet-bulb temperature 15

90

80

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF HEARING FOR CONTINUOUS

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

FUNCTION

COOLING

HEATING

SPL(dB(A))

37

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1

FAN SPEED

High

Test conditions, Cooling : Dry-bulb temperature 27Wet-bulb temperature 19

Heating : Dry-bulb temperature 20Wet-bulb temperature 15

90

80

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF HEARING FOR CONTINUOUS

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

FUNCTION

COOLING

HEATING

SPL(dB(A))

38

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

PFFY-P40VKM-E PFFY-P40VKM-ER1

FAN SPEED

High

Test conditions, Cooling : Dry-bulb temperature 27Wet-bulb temperature 19

Heating : Dry-bulb temperature 20Wet-bulb temperature 15

90

80

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF HEARING FOR CONTINUOUS

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

FUNCTION

COOLING

HEATING

SPL(dB(A))

44

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

INDOOR UNIT

MICROPHONE

1m

WALL

10

AIR OUTLET SELECTION6

ON OFF

12345678910

SW12

0

1

9

2

8

3

7

4

6

5

(10ths DIGIT)

SW1

SW11

0

1

9

8

7

4

6

5

(1s DIGIT)

CN43

SWC

CN82

SW14

2

3

SWC

0

1

F

2

E

D

C

B

7

A

8

9

./

(BRANCH No.)

With this function, air comes out simultaneously from the upper and lower air outlets so that the room can be cooled or heated effectively. This function is set using the switch SWC on the address board.

3

4

5

6

.

Fig. 4-1

SWC

How to set to blow out air from the upper and lower air outlets: Set the SWC to lower side (" "). (Initial setting)

Air blows out automatically from the upper and lower air outlet as shown in the table below.

SWC

Note: Be sure to operate with the main power turned off.

How to set to blow out air from the upper air outlet only: Set the SWC to upper side (" ").

Description of operation

Operation

COOL

Air flow

Conditions

Upper and lower air flow

Room temperature and set temperature are different. +1

Upper air flow

Room temperature is close to set temperature or thermo-off.+1

• Be sure to keep the area around the damper of the lower air outlet free of any objects.

+1

Upper air flow

2deg

+2 DIP SW3-2 (on indoor controller board) : OFF (Initial Setting)

If the air conditioner has operated for 2hours with upper and lower air flow, it changes to 8deg for next 30minutes. After 30minutes it changes back to 4deg.

DIP SW3-2 (on indoor controller board) : ON Remains to be 4deg.

DRY

Upper air flow only

—

Upper and lower air flow

4deg +2

Upper and lower air flow

(Normal condition (in heating))

HEAT FAN

Upper air flow

During defrosting operation, start of operation, thermo-off

(Room temp. – Set temp.)

Upper and lower air flow

—

11

7

OUTLINES AND DIMENSIONS

PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1

INDOOR UNIT

More than

100mm

700

607

125

46.5 46.5

More than 100mm

60

12

19

60

54 508 137

110

More than 100mm

45 35

600

Air out

Installation plate

Air in

11

123

drain

4-:6 Hole

Indoor unit

20012

118

96

12

60

128

363

12

Gas pipe :12.7(flared)1/2

Liquid pipe :6.35(flared)1/4

165

125

6019

Unit : mm

131131

7

333210

593

337 337

205

147

60

454155

72

60

80

12

WIRING DIAGRAM8

PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1

[LEGEND]

SYMBOL

I. B

INDOOR CONTROLLER BOARD CONNECTOR REMOTE SWITCH

CN32

CENTRALLY CONTROL

CN51

REMOTE INDICATION

CN52

SWITCH CAPACITY CODE

SW2

MODE SELECTION

SW3

MODEL SELECTOR

SW4

VARISTOR

ZNR

FUSE (T6.3AL250V)

FUSE

POWER SUPPLY (I.B)

LED1

POWER SUPPLY (I.B)

LED2

NOTES

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 connecter . (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, : connector.

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

LED on indoor board for service

MARK

Main power supply

LED1

Power supply for

LED2

MA-Remote controller

NAME SYMBOL NAME

MF1 MF2 MV1 MV2 LS LEV TB2 TB5 TH21

TH22

1 2

MEANING

FUNCTION

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

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

FAN MOTOR (UPPER)

TH23

FAN MOTOR (LOWER)

SYMBOL

VANE MOTOR

A. B DAMPER MOTOR DAMPER LIMIT SWITCH (CLOSE) LINEAR EXPANSION VALVE POWER SUPPLY

TERMINAL BLOCK

TRANSMISSION THERMISTOR

ROOM TEMP. DETECTION

(0/15k, 25/5.4k)

PIPE TEMP. DETECTION/LIQUID

(0/15k, 25/5.4k)

LEV

6

TH21 TH22 LSTH23

NAME

PIPE TEMP. DETECTION/GAS (0/15k, 25/5.4k)

ADDRESS BOARD

SW1

SWITCH MODE SELECTION SW11 SW12 SW14

BRANCH NO. SWC

AIR OUTLET SELECTION

ADDRESS SETTING 1s DIGIT ADDRESS SETTING 10ths DIGIT

<fig.+1>

MODELS SW2

P20

P25

P32

P40

ON

OFF

ON

OFF

ON

OFF

ON

OFF

123456

+

1.

MF2

MF1

POWER SUPPLY 220-240V 50Hz

TO OUTDOOR UNIT BC CONTROLLER REMOTE CONTROLLER DC24-30V

RED

BLK

WHT BRN BLU

654321

RED

BLK WHT

BRN BLU

654321

TB2

RED

L N

BLU

GRN/YLW

S(SHIELD)

BLK

M1 M2

I.B

LED1

FUSE

12345

CND

(BLK)

TB5

TO MA-REMOTE CONTROLLER DC8.7-13V

654321 4321

321 321

ZNR

CN31

(WHT)

CNMF2

CNMF1

(WHT)

7531 21

8642

(WHT)

BLU BLU

CN60

(WHT)

1 2

DC311

LED2

CN2M

(BLU)

12

ORN

~339V

123

CN3A (BLU)

CN44

(WHT)

21

CN20

(WHT)

SWE

ON

CN42 (RED)

CN6V2

(BLU)

123456

BLU

PNK

YLW

ORN

123456

MV2 MV1

OFF

4321

RED

CN36 (BLK)

CN51

(WHT)

CN32

(WHT)

CN6V1

(GRN)

123456

BLU

PNK

BRN

YLW

123456

CN52

(GRN)

CN81 (RED)

12345678

SW4

12345

ON

OFF

SW3

12345678910

ON

OFF

SW2

123456

ON

OFF

RED

BRN

ORN

8

4

A.B

87654321

4321

CN43 (RED)

SW1

12345678910

ON

OFF

See fig:+ 1

CN82 (RED)

SW14

SWC

SW11

SW12

0

NO.

BRANCH





0

1s

DIGIT

0

10ths

DIGIT

13

9 REFRIGERANT SYSTEM DIAGRAM

PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1

Thermistor (Pipe temperature detection/Gas) TH23

Thermistor (Pipe temperature detection/Liquid) TH22

Strainer (#50mesh)

Gas pipe

Flare connection

Item

Gas pipe

Liquid pipe

Heat exchanger

Linear expansion valve

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

Thermistor (Room temperature detection) TH21

Capacity

PFFY-P20,P25,P32,P40VKM-E(R1)

:12.7(1/2'')

:6.35(1/4'')

Liquid pipe

Strainer (#100mesh)

Unit: mm

14

10

TROUBLE SHOOTING

10-1. HOW TO CHECK PFFY-P20VKM-E PFFY-P32VKM-E PFFY-P25VKM-E PFFY-P40VKM-E

PFFY-P20VKM-ER1 PFFY-P32VKM-ER1 PFFY-P25VKM-ER1 PFFY-P40VKM-ER1

Parts name Check points

Room temperature thermistor (TH21)

Liquid pipe temperature thermistor (TH22)

Gas pipe temperature thermistor (TH23)

Fan motor (MF1,2)

Linear expansion valve (LEV)

M





White

Red









Orange

Blue

Brown

Yellow

Vane motor (MV1)

Red

M

Yellow

Brown

Green

Orange

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

Normal

4.3k~9.6k

Abnormal

Open or short

(Refer to the next page for a detail.)

Check 10-2.

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

Abnormal

Open or short

(1)-(5)

White-Red

Normal

(2)-(6)

Yellow-Brown

(3)-(5)

Orange-Red

(4)-(6)

Blue-Brown

200 $10%

Measure the resistance between the terminals using a tester. (Surrounding temperature 20~30)

NormalConnector Abnormal

Brown — Red

Brown — Orange

Brown — Yellow

282~306 Open or short

Brown — Blue

(Refer to the next page for a detail.)

Damper motor (MV2)

Orange

Red

Pink









M



BlueYellow Brown

Measure the resistance between the terminals using a tester. (Surrounding temperature 20~30)

NormalConnector Abnormal

Brown — Yellow

Brown — Blue

Red — Orange

186~214 Open or short

Red — Pink

15

Thermistor for lower temperature

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

< Thermistor for lower temperature >

50

40

Thermistor R

0=15k' ± 3%

Fixed number of B=3480 ± 2%

Rt=15exp { 3480( ) }

1

273+t

1

273

0: 15k'

30

Resistance (K)

20

10: 9.6k' 20: 6.3k' 25: 5.2k' 30: 4.3k'

10

40: 3.0k'

0

-20-10 0 1020 304050

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.

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

16

2

OFF

Output

3

OFF

Output

(Phase)

{1

1

ON

4

ON

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

{2

{3

{4

ON

OFF

ON

OFF

ON

OFF

ON

2 Linear expansion valve operation

C

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

Close

Valve position (capacity)

A

E

B

Extra tightning (80~100pulse)

D

Open

Pulse number

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

• 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

position.

• 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 A or when the valve is locked,

more noise can be heard than normal situation.

• Noise can be detected by placing the ear against the screw driver handle while putting the screw driver to the linear expansion valve.

3 Trouble shooting

Symptom

Operation circuit failure of the micro processor.

Linear expansion valve mechanism is locked. Short or breakage 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.

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.

of

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

Liquid pipe thermistor

Linear expansion valve

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 connector.

LED1

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 controller, it means the valve is not closed all the way.

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.

17

10-2. FAN MOTOR

Check method of indoor fan motor (fan motor/control P.C.board)

Notes



· High voltage is applied to the connecter (CNMF1) for the fan motor. Pay attention to the service.

· Do not pull out the connector (CNMF1,2) for the motor with the power supply on. (It causes trouble of the control Self check



Conditions : The indoor fan cannot turn around.

Wiring contact check

Contact of fan motor connector (CNMF1,2)

P.C.board)

Was contact caused good?

N0

Wiring recovery

Yes

Power supply check

Check the voltage in the indoor control P.C.board TEST POINT FAN MOTOR (upper) CNMF1  CNMF2 : DC310 ~ 340V CNMF2  : DC15V CNMF2  : DC0 ~ 6.5V

FAN MOTOR (lower) CNMF1  CNMF2 : DC310 ~ 340V CNMF2  : DC15V CNMF2  : DC0 ~ 6.5V

The voltage between CNMF2  and  are values during the fan motor operation. In the case that the fan motor off, the voltage is 0V.

Is the voltage normal?

Yes

No

Indoor controller board fuse check

Is the fuse normal?

Replace the indoor

controller board.

Yes

No

NG

Check the operation END

Replace the fuse.

OK

Fan motor position sensor signal check

Turn around the fan motor more than one revolution slowly, and check the voltage between the connecter FAN MOTOR (upper) CNMF2 /FAN MOTOR (lower) CNMF2 

Does the voltage repeat DC 0V and DC 15V?

Yes

Replace the indoor

controller board.

OK

Check the operation END

NG

Replace the fan motor.

No

OK

Check the operation

NG

Replace the fan motor.

Yes

Check the operation of fan. END

NG

Replace the indoor controller board.

18

END

OK

10-3. FUNCTION OF DIP SWITCH

Switch Function Remarks

Pole

ON OFF

Thermistor <Room temperature

Operation by switch

SW1

Function

setting

1

detection> position

2

Filter clogging detection

3

Filter cleaning

4

Fresh air intake

Switching remote

5

controller display

6

Humidifier control

7

Air flow set in case of Heat thermostat OFF

8

9

Auto restart function

10

Power ON/OFF by breaker

Built-in remote controller

Provided

2,500hr

Effective

Indicating if the thermostat is ON

Always operated while the heat in ON +1

Low +3

Setting air flow +3

Effective

Indoor unit

Not provided

100hr

Not effective

Indicating fan operation ON/OFF

Operated depends on the condition +2

Extra low +3

Depends on SW1-7

Not effective

Effective

timing

Under suspension

Address board

ON

OFF

1234 5678 9

Note :

+1

Fan operation at Heating

mode.

+2

Thermo ON operation at

heating mode.

+3

SW 1-7=OFF, SW 1-8=ON → Setting air flow. SW 1-7=ON, SW 1-8=ON → Indoor fan stop.

Indoor controller board

Set while the unit is off.

Set for each capacity.

SW2

Capacity

code

setting

1~6

Capacity

P20 P32

P25 P40

SW 2 Capacity SW 2

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

Before power supply ON

10

SW3

Function

setting

SW4

Model Selection (Setting

for

PFFY

series)

Heat pump/Cooling only

1

Limitation at time of damper

2

open operation + 4

Van e

3

Vane swing function

4

Vane horizontal angle

5

Vane cooling limit angle setting +5

6

Changing the opening of linear

7

expansion valve during thermo OFF

Heat 4degrees up

8

Superheat setting temperature

9

Sub cool setting temperature +6

10

In case replacing the indoor controller board, make sure to set the switch to the factory-preset status, which is shown below.

1~5

ON

OFF

Cooling only

Not effective

Available

Second setting +7

Horizontal angle

Effective

Not effective

+6

—

12345

Heat pump

Effective

Not available

First setting

Down B, C

Not effective

Effective

—

Under suspension

Note :

+4

SELECTION"

+5

can be used only 1 hour.

+6 SW3-9,10. +7 as first setting.

Before power supply ON

Indoor controller board

Set while the unit is off.

ON

OFF

1234 5678 9

Refer to "6. AIR OUTLET

At cooling mode, each angle

Please do not use

Second setting is the same

Indoor controller board

10

19

Switch

Pole

Operation by switch

Effective

timing

Remarks

Address board

SWC

Air

outlet

selector

SW11

1s digit

address

setting

SW12

10ths digit

address

setting

SW14

Branch

No.

setting

Connector

2

(Standard)

SW1210SW11

9

8

7

6

Rotary switchRotary switch

(Option)

0

1

2

3

4

5

SW14

0

1

F

E

D

C

B

A

8

9

Refer to 6. AIR OUTLET SELECTION.

0

9

8

7

6

5

1

2

3

4

5

6

7

How to set address

1

Example : If address is "3", remain SW12

2

3

4

(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".

Setting by connector Remarks

Before power supply ON

Option

Standard

Address board

Address can be set while the unit is stopped.

SW12 SW11

0

9

8

7

6

0

1

5

1

9

2

8

3

4

3

7

4

6

5

Address board

SW14

0

1

2

F

3

E

4

D

5

C

6

B

7

A

8

9

SWE No function

ON

Please do not change the setting to SWE.

OFF

Indoor controller board

20

10-4. TEST POINT DIAGRAM

10-4-1. Indoor controller board

PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1

CND Power supply

FUSE

6.3A 250V

CNMF1, CNMF2

FAN motor (upper)

CNMF11-CNMF21 : DC280V CNMF23-1 : 15V DC CNMF25-1 : 0-6.5V DC CNMF27-1 : 0-15V DC

FAN motor (lower)

CNMF12-CNMF22 : DC280V CNMF24-2 : 15V DC CNMF25-2 : 0-6.5V DC CNMF28-2 : 0-15V DC

CN2M

Connect to the terminal block TB5

(M-NET transmission connecting wire)

24-30V DC (non-polar)

1-2 : 220-240V AC

LED1 Main power supply

Power supply for

LED2

MA-Remote controller

CN3A

MA-Remote controller

connecting wire

1-3 8.7-13V DC (Pin 1 (+))

CN6V2

Damper motor

CN6V1

Vane motor

CN32

Connector (Remote switch)

SW2 Capacity setting

SW3 Function setting

SW4 Model setting

CN31 Drain sensor (DS)

CN60 Linear expansion valve (LEV)

CN20 Room thermistor/Liquid (TH21)

CN44 Pipe temperature 1-2: thermistor/Liquid (TH22) 3-4: thermistor/Gas (TH23)

CN36 Damper limit switch

CN151 Centrally control

CN52 Remote indication

21

10-4-2. Address board

PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1

SW1 Function setting

SW12 10ths digit address setting

SW11 1s digit address setting

SWC Air outlet selection

22

11

DISASSEMBLY PROCEDURE

PFFY-P20VKM-E PFFY-P32VKM-E PFFY-P25VKM-E PFFY-P40VKM-E PFFY-P20VKM-ER1 PFFY-P32VKM-ER1 PFFY-P25VKM-ER1 PFFY-P40VKM-ER1

OPERATING PROCEDURE

1. Removing the panel

(1) Push both sides of the upper part of the front grille and pull the front grille open, and then remove the front grille from the panel. (See Photo 1.) (2) Remove the screws of the panel. (See Photo 2.) (3) Open the horizontal vane and push the left, right and middle of the upper part of the panel, and pull the panel toward you. (See Photo 2.) (4) Lift up the panel and remove it from the box.

Photo 1

Push

Grille

Photo 2

PHOTOS

Horizontal vane

Push

Screws of the panel

Push

2323

OPERATING PROCEDURE PHOTOS

2. Removing the indoor controller board and address board

(1) Remove the panel. (Refer to 1.) (2) Remove the screw of the electrical cover, and then the electrical cover. (See Photo 3.) (3) Remove the screw of the ground wires connected to the indoor fan motor (lower), and then the ground wires. (See Photo 4.) (4) Remove the screw of the ground wires connected to the indoor heat exchanger, and then the ground wires. (See Photo 4.) (5) Disconnect all the connectors on the address board and remove the screw of the address board case. (6) Remove the screw of the ground wire connected to the indoor controller board, and then the ground wire. (See Photo 4.) (7) Pull the indoor controller board case slightly toward you from the electrical box, and disconnect all the connectors on the indoor controller board. (8) Pull out the indoor controller board case from the electrical box.

Photo 3

Hair pin cover

Photo 4

Address board (A.B)

Water cover

Screw of the ground wire (I.B)

Screw of the electrical cover

3. Removing the electrical box

(1) Remove the panel. (Refer to 1.) (2) Remove the electrical cover. (Refer to 2.) (3) Remove the ground wires from the electrical box. (Refer to 2.) (4) Remove the ground wires connected to the indoor fan motor and ones connected to the indoor heat exchanger. (See Photo 4.) (5) Remove the screw of the electrical box. (See Photo 4.) (6) Disconnect the following connectors on the indoor controller board.

• Fan motor connectors <CNMF1, 2>

• Vane motor connector <CN6V1>

• Damper motor connector <CN6V2>

• Pipe temperature thermistor connector <CN44>

• Damper limit switch connector <CN36> (7) Unhook the electrical box from the upper catch and pull out the electrical box from the box.

Terminal block (TB2)

Terminal block(TB5)

Screw of the ground wire (Heat exchanger)

Indoor controller board (I.B)

Screw of the ground wire (Fan motor)

24

OPERATING PROCEDURE PHOTOS

4. Removing the vane motor (MV1)

(1) Remove the panel. (Refer to 1.) (2) Remove the screws of the vane motor and pull out the vane motor. (See Photo 5.) (3) Disconnect the connector from the vane motor.

5. Removing the indoor fan motor (upper) (1) Remove the panel. (Refer to 1.) (2) Remove the electrical box. (Refer to 3.)

(3) Remove the nozzle (upper). (See Photo 6.) (4) Unhook the water cover from the catches and remove the

water cover. (See Photo 6.)

(5) Removing the screw of the motor band, and then the motor

band.

(See Photo 7.) (6) Remove the line flow fan and the indoor fan motor (upper) from the box.

Photo 5

Screw of vane motor

Photo 6

Nozzle <Upper>

Photo 7

Water cover

Screw of motor band

25

OPERATING PROCEDURE PHOTOS

6. Removing the damper motor and the damper limit switch

(1) Remove the panel. (Refer to 1.) (2) Remove the screws of the nozzle assembly (lower). (See Photo 8.) (3) Remove the drain hose from the nozzle assembly (lower) and pull out the nozzle assembly (lower) toward you. (4) Remove the tape fixing the lead wires of the damper motor from the nozzle assembly <lower>. (See Photo 9.) (5) Remove the screws of the damper motor support, and then the damper motor support. (6) Remove the screws of the damper motor, and then the damper motor from the damper motor support. (7) Disconnect the connector from the damper motor. (8) Remove the damper limit switch. (LS).

7. Removing the indoor fan motor

(1) Remove the panel. (Refer to 1.) (2) Remove the nozzle assembly (lower) and the drain hose. (Refer to 6.) (3) Remove the screw of the ground wire of the indoor fan motor (lower), and then the ground wire. (See Photo 11.) (4) Remove the screw of the motor band, and then the motor band. (See Photo11.) (5) Remove the line flow fan and the indoor fan motor (lower) from the box.

Photo 8

Screw of the nozzle

Photo 9

Lead wires of the damper motor

Photo 10

Screw of the nozzle

Drain hose

Screw of the damper motor support

Photo 11

26

Screw of the motor band

Screw of the damper motor

Screw of the ground wire

OPERATING PROCEDURE PHOTOS

8. Removing the pipe temperature detection (liquid and gas) thermistors and room temperature thermistor

(1) Remove the panel. (Refer to 1.) (2) Remove the screw of the electrical cover, and then the electrical cover. (See photo 3) (3) Remove the pipe temperature detection (liquid and gas) thermistors from the holders. (4) Disconnect the connector CN44 on the indoor controller board. (5) Loosen the room temperature thermistor wire clamp under the electrical box. (6) Disconnect the connector CN20 on the indoor controller board.

9. Removing the heat exchanger and linear expansion valve

(1) Remove the panel. (Refer to 1.) (2) Remove the hair pin cover and water cover (See Photo 3.) (3) Remove the 2 screws of the heat exchanger. (See Photo 14.) (4) Unhook the heat exchanger from 2 catches (electrical box side). (5) Pull out the heat exchanger and linear expansion valve.

Photo 12

Thermistor (Gas/TH23)

Photo 13

Thermistor (Liquid/TH22)

Room temperature thermistor (TH21)

27

Heat exchanger

Photo 14

Screws of the heat exchanger

Hair pin cover

12 RoHS PARTS LIST

12-1. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1

23

1

2

3

4

24

5

6

7

8

9

10

16

15

17

15

14

13

22

21

20

11

4

12

18

19

28

12-1. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

Part number that is circled is not shown in the illustration.

No.

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

Part No.

RoHS

G

T7W E00 530

G

T7W E07 002

G

T7W E06 002

G

T7W E01 103

G

T7W E00 103

G

T7W E01 530

G

T7W E08 223

G

T7W E09 130

G

T7W E00 170

G

T7W E00 272

G

T7W E03 527

G

R01 E09 527

G

T7W E08 002

G

T7W E04 114

G

T7W E26 762

G

T7W E00 105

G

T7W E08 130

G

T7W E25 762

G

R01 E27 246

G

R01 H18 202

G

R01 H08 202

G

T7W E37 716

G

T7W E55 310

G

T7W E80 310

G

T7W E01 294

G

T7W E07 223

G

T7W E03 114

G

R01 E06 239

G

T7W E04 304

Part name

NOZZLE ASSEMBL Y (UPPER) HORIZONTAL VANE (UPPER) HORIZONTAL VANE (LOWER) VANE SLEEVE BEARING ASSEMBL Y NOZZLE ASSEMBL Y (LOWER) DAMPER MOTOR VANE MOTOR SUPPORT SM SHAFT DAMPER LIMIT SWITCH (CLOSE) DRAIN HOSE DRAIN HOSE VANE UNDER LINE FLOW FAN (LOWER) INDOOR FAN MOTOR (LOWER) RUBBER MOUNT (L,R) MOTOR BAND INDOOR FAN MOTOR (UPPER) TERMINAL BLOCK ROOM TEMPERATURE THERMISTOR ROOM TEMPERATURE THERMISTOR TERMINAL BLOCK INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD ADDRESS BOARD VANE MOTOR (SET) LINE FLOW FAN (UPPER) FUSE ADDRESS CABLE

Symbol

in Wiring

Diagram

MV2

LS

MF2

MF1

TB5 TH21 TH21

TB2

I.B I.B

A.B

MV1

FUSE

Q'ty/unit

PFFY-P20/25/32/40

VKM-E

1 1 1 3 2 1 1 1 1 1 1

1 1 1 2 2 1 1 1

1 1

1 1 1 1 1

VKM-ER1

1 1 1 3 2 1 1 1 1 1

1 1 1 1 2 2 1 1

1 1

1 1 1 1 1 1

Remarks

UP & DOWN

ARW40Y8P30MS

ARW40Z8P30MS 3P (M1, M2, S)

3P (L, N, )

UP&DOWN

6.3A

2929

12-2. STRUCTURAL PARTS PFFY-P20VKM-E PFFY-P20VKM-ER1

PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1

1

2

3

12-2. STRUCTURAL PARTS

5

4

No.

1 2 3 4 5

Part No.

RoHS

G

T7W E01 635

G

T7W E06 651

G

T7W E05 691

G

T7W E01 500

G

T7W E01 808

Part name

BOX PANEL ASSEMBLY FRONT PANEL CA TECHIN AIR FIL TER BACK PLATE

Symbol

in Wiring

Diagram

Q'ty/unit

PFFY-P20/25/32/40VKM-E

PFFY-P20/25/32/40VKM-ER1

1 1 1 1 1

Remarks

30

12-3. INDOOR UNIT HEAT EXCHANGER PFFY-P20VKM-E PFFY-P20VKM-ER1 PFFY-P25VKM-E PFFY-P25VKM-ER1 PFFY-P32VKM-E PFFY-P32VKM-ER1 PFFY-P40VKM-E PFFY-P40VKM-ER1

5

4

3

1

2

12-3. INDOOR UNIT HEAT EXCHANGER

No. Part No.

RoHS

1

G

T7W E00 031

2

G

T7W H56 480

3

G

T7W E01 031

4

G

T7W E16 202

G

5

T7W E19 401

G

R01 H23 401

HAIR PIN COVER INDOOR HEAT EXCHANGER WATER COVER PIPE TEMPERATURE THERMISTOR EXPANSION VALVE EXPANSION VALVE

Part name

Symbol

in Wiring

Diagram

TH22,TH23

LEV

Q'ty/unit

PFFY-P20/25/32/40

VKM-E VKM-ER1

1 1 1 1 1

1 1 1 1

1

Remarks

31

TM

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

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

Mitsubishi PFFY-P20VKM-E(R1), PFFY-P25VKM-E(R1), PFFY-P32VKM-E(R1), PFFY-P40VKM-E(R1) Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual