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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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

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

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

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

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

44

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

INDOOR UNIT

MICROPHONE

1m

1m

WALL

10