Mitsubishi PMFY-P20VBM-E, PMFY-P25VBM-E, PMFY-P20VBM-ER3, PMFY-P20VBM-E#2, PMFY-P25VBM-E1 Technical & Service Manual

TECHNICAL & SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Indoor unit
[Model names] [Service Ref.]

No. OC307

REVISED EDITION-D

INDOOR UNIT

CONTENTS

1. TECHNICAL CHANGES

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

2

2. SAFETY PRECAUTION

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

2

3. PART NAMES AND FUNCTIONS

......

6

4. SPECIFICATIONS

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

8

5. OUTLINES AND DIMENSIONS

........

12

6. WIRING DIAGRAM

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

13

7.

REFRIGERANT SYSTEM DIAGRAM

.....

16

8. TROUBLE SHOOTING

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

17

9. DISASSEMBLY PROCEDURE

.........

26

10. PARTS LIST

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

30

11. RoHS PARTS LIST

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

33

Ceiling Cassettes

Series PMFY

R407C

R22

R410A

October 2009

Note:

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

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

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

Revision:

•

PMFY-P20/25/32/40VBM-ER3
are added in REVISED
EDITION-D.

• Some descriptions have

been modified.

• Please void OC307

REVISED EDITION-C.

PMFY-P20VBM-E

PMFY-P25VBM-E

PMFY-P32VBM-E

PMFY-P40VBM-E

PMFY-P20VBM-E
PMFY-P20VBM-E

1

PMFY-P20VBM-E#2
PMFY-P20VBM-ER3
PMFY-P25VBM-E
PMFY-P25VBM-E

1

PMFY-P25VBM-E#2
PMFY-P25VBM-ER3
PMFY-P32VBM-E
PMFY-P32VBM-E

1

PMFY-P32VBM-E#2
PMFY-P32VBM-ER3
PMFY-P40VBM-E
PMFY-P40VBM-E

1

PMFY-P40VBM-E#2
PMFY-P40VBM-ER3

2

2

SAFETY PRECAUTION

Cautions for units utilizing refrigerant R407C

CAUTIONS RELATED TO NEW REFRIGERANT

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

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

Use liquid refrigerant to 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 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.

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

Use new refrigerant pipes.

Make sure that the inside and outside of refrige­rant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.

In case of using the existing pipes for R22, be careful with
the followings.

· Change flare nut to the one provided with this product.
Use a newly flared pipe.

· Avoid using thin pipes.

Contamination inside refrigerant piping can cause deterio­ration of refrigerant oil etc.

1

TECHNICAL CHANGES

PMFY-P20VBM-E PMFY-P20VBM-E1
PMFY-P25VBM-E PMFY-P25VBM-E1
PMFY-P32VBM-E PMFY-P32VBM-E1
PMFY-P40VBM-E PMFY-P40VBM-E1

1. FAN MOTOR (MF) has been changed.

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

PMFY-P20VBM-E1 PMFY-P20VBM-E#2
PMFY-P25VBM-E1 PMFY-P25VBM-E#2
PMFY-P32VBM-E1 PMFY-P32VBM-E#2
PMFY-P40VBM-E1 PMFY-P40VBM-E#2

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

2. PANEL has been changed.
PMP-40BM → PMP-40BMW

(White : 0.98Y 8.99/0.63) (Pure white : 6.4Y 8.9/0.4)

3. FAN MOTOR (MF) has been changed.

4. THERMISTOR (TH22, TH23) have been changed.

PMFY-P20VBM-E#2 PMFY-P20VBM-ER3
PMFY-P25VBM-E#2 PMFY-P25VBM-ER3
PMFY-P32VBM-E#2

PMFY-P32VBM-ER3

PMFY-P40VBM-E#2 PMFY-P40VBM-ER3

1. DRAIN PIPE has been changed.

2. JOINT SOCKET (FOR DRAIN PIPE) has been added.

33

[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.

[3] Service tools

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

[1] Cautions for service

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

· Do not release refrigerant in the air.

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

Gravimeter

Unit

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

· 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

—

4

Cautions for units utilizing refrigerant R410A

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.)

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.

Handle tools with care.

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

Do not use a charging cylinder.

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

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 enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com­pressor.

If large amount of mineral oil enters, that 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.

Use new refrigerant pipes.

Make sure that the inside and outside of refrige­rant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.

In case of using the existing pipes for R22, be careful with
the followings.

· Change flare nut to the one provided with this product.
Use a newly flared pipe.

· Avoid using thin pipes.

Contamination inside refrigerant piping can cause deterio­ration of refrigerant oil etc.

5

[1] Cautions for service

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

Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from cylinder

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

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

Gravimeter

Unit

[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

specifications

. (UNF1/2)

· 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

Adapter 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

—

6

3

PART NAMES AND FUNCTIONS

Indoor Unit

Guide vane

Air flow can be changed to horizontal
by moving the Guide vane to the left or right.

Air intake

Returns air from room.

Filters

Remove dust and pollutants
from return air.

Auto Air Swing Vane

Disperses airflow up and
down and adjusts the angle
of airflow direction.

Horizontal Air Outlet

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

MENU

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

Temperature setting buttons

Down

Up

Timer Menu button
(Monitor/Set button)

Mode button (Return button)

Set Time buttons

Back

Ahead

Timer On/Off button
(Set Day button)

Opening the
lid

ON/OFF button

Fan Speed button

Filter button
(<Enter> button)

Test Run button

Check button (Clear button)

Airflow Up/Down button

Louver button
( Operation button)

To return operation
number

Ventilation button
( Operation button)

To go to next operation
number

Built-in temperature sensor

Wired remote controller

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

77

Wired remote controller

●

●

°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

Note:

“PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.
“NOT AVAILABLE” message
This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as
far as any of the indoor units is equipped with the function.

Display Section

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

Identifies the current operation

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

“Centrally Controlled” indicator

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

“Timer is Off” indicator

Indicates that the timer is off.

Temperature Setting

Shows the target temperature.

Day-of-Week

Shows the current day of the week.

Time/Timer Display

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

“Sensor” indication

Displayed when the remote controller
sensor is used.

“Locked” indicator

Indicates that remote controller but­tons have been locked.

“Clean The Filter” indicator

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

Timer indicators

The indicator comes on if the corre­sponding timer is set.

Up/Down Air Direction indica­tor

The indicator shows the direction
of the outcoming airflow.

“One Hour Only” indicator

Room Temperature display

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

8 or 39

or more.

Louver display

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

(Power On indicator)

Indicates that the power is on.

Fan Speed indicator

Shows the selected fan speed.

Ventilation indicator

Appears when the unit is running in
Ventilation mode.

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

8

4

SPECIFICATIONS

4-1. SPECIFICATION

Note 1. Rating conditions (JIS B 8615-1)
Cooling: Indoor: D.B. 27°C W.B. 19°C
outdoor: D.B. 35°C
Heating: Indoor: D.B. 20°C
outdoor: D.B. 7°C W.B. 6°C
Note 2. The number indicated in < > is for the grille.

W 3. Air flow and the noise level are indicated as High – Medium1 – Medium2 – Low.

Item

V

·Hz

kW

kW

kW

kW

A

A

—

mm

mm

mm

—

—

G/min

Pa

kW

—

—

:mm(in.)

:mm(in.)

:mm

dB

kg

Cooling capacity

Power

Heat exchanger

Insulator

Air filter

Fan × No

Air flow 3

Pipe

dimensions

Field drain pipe size

Noise level 3

Product weight

Exterior

(munsell symbol)

Fan motor

output

External

static pressure

Liquid

side

Gas
side

Heating capacity

Dimensions

Height

Width

Depth

Electric characteristic

Input

Cooling

Heating

Cooling

Heating

Current

PMFY-P20VBM-E

PMFY-P20VBM-E

1

PMFY-P20VBM-E#2

PMFY-P20VBM-ER3

PMFY-P25VBM-E

PMFY-P25VBM-E

1

PMFY-P25VBM-E#2
PMFY-P25VBM-ER3

PMFY-P32VBM-E

PMFY-P32VBM-E

1

PMFY-P32VBM-E#2

PMFY-P32VBM-ER3

PMFY-P40VBM-E

PMFY-P40VBM-E

1

PMFY-P40VBM-E#2
PMFY-P40VBM-ER3

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

2.2

2.5

0.042

0.042

0.20

0.20

2.8

3.2

0.044

0.044

0.21

0.21

3.6

4.0

0.044

0.044

0.21

0.21

4.5

5.0

0.054

0.054

0.26

0.26

9.3-8.6-8.0-7.3

37-36-34-32

8.7-8.0-7.2-6.5

35-33-30-27

10.7-9.7-8.7-7.7

39-37-35-33

Unit : Galvanized sheets · Standard grilles : ABS resin acrylic coating

Munsell <0.98Y 8.99/0.63> (PMFY-P·VBM-E

(1)) / <6.4Y 8.9/0.4> (PMFY-P·VBM-E#2/ER3)

230<30>

812<1,000>

395<470>

Cross fin

Line flow fan × 1

0

0.028

Polyethylene sheet

PP honey comb fabric

12.7(1/2")

6.35(1/4")

O.D.26 (PVC pipe VP-20 connectable)

14<3.0>

F a n

99

4-2. ELECTRIC PARTS SPECIFICATIONS

Parts name

Service ref.

Symbol

TH21

TH22

TH23

FUSE

MF

MV

DP

DS

LEV

TB2

TB5

TB15

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

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

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

250V 6.3A

Thermistor resistance 0/6k, 10/3.9k, 20/2.6k, 25/2.2k, 30/1.8k, 40/1.3k

(L, N, ) 330V 30A

(M1, M2, S) 250V 20A

(1,2) 250V 10A

Liquid pipe thermistor

Gas pipe thermistor

Drain pump

Drain sensor

Linear expansion valve

PMFY-P20VBM-E

PMFY-P20VBM-E

1

PMFY-P20VBM-E#2

PMFY-P20VBM-ER3

PMFY-P25VBM-E

PMFY-P25VBM-E1

PMFY-P25VBM-E#2

PMFY-P25VBM-ER3

PMFY-P32VBM-E

PMFY-P32VBM-E1

PMFY-P32VBM-E#2

PMFY-P32VBM-ER3

PMFY-P40VBM-E

PMFY-P40VBM-E1
PMFY-P40VBM-E#2
PMFY-P40VBM-ER3

Room temperature
thermistor

Fuse
(Indoor controller board)

Fan motor

Vane motor

Power supply
terminal block

Transmission
terminal block

DC Brushless Motor

8-pole OUTPUT 28W

PN0H28-MB

MSFJC 20M23

12V/380



PJV-1046

220-240V 50/60Hz

DC12V Stepping motor drive, Port dimension :3.2

(0~2000pulse)

MA-remote controller
terminal block

10

4-3. AIR CAPACITY TAKEN FROM OUTSIDE

PMFY-P·VBM-E series enables to take fresh air from outside. When taking fresh air, the duct fan is used.
The air capacity should be 20% or less of the air flow SPEC(Hi).

50.0

-50.0

-100.0

0.0 0.5 1.0
Air flow (m

3

/min)

2 intakes

1 intake

Characteristic diagram of fresh air taken capacity

Static pressure (Pa)

1.5 2.0 2.5

0.0

PMFY-P20VBM-E
PMFY-P20VBM-E

1

PMFY-P20VBM-E#2
PMFY-P20VBM-ER3

PMFY-P25VBM-E
PMFY-P25VBM-E

1

PMFY-P25VBM-E#2
PMFY-P25VBM-ER3

PMFY-P32VBM-E
PMFY-P32VBM-E

1

PMFY-P32VBM-E#2
PMFY-P32VBM-ER3

PMFY-P40VBM-E
PMFY-P40VBM-E

1

PMFY-P40VBM-E#2
PMFY-P40VBM-ER3

8.7m³/min

9.3m³/min

9.3m³/min

10.7m³/min

Max 1.74m³/min

Max 1.86m³/min

Max 1.86m³/min

Max 2.14m³/min

Air flow

(Hi)

Air capacity from outside

Service Ref.

(Knockout)

4-W2.8

Fresh air intake hole

(Knockout)

Fresh air intake hole

90

W

122

W

100

108

250 288.5

Unit : mm

Installation at site

1

~

CN51

Multiple remote
controller adapter
PAC-SA88HA-E

Indoor controller board

Distance between indoor
controller board and relay
must be within 10m.

Be sure to secure insulation
material by tape, etc.

5

Green

Yellow

Orange

Connector (5P)

Indoor unit side

Multiple remote
controller adapter
PAC-SA88HA-E

Be sure to secure insulatio

n

material by tape, etc.

CN51
on
indoor unit
board

Red

Brown

MB

Q

0

B

A

C







Curve in the
right graphs

Duct characteristics
at site

Q

A

EC

Q

Qa

AD

Operation in conjunction with duct fan (Booster fan)

● Whenever the indoor unit is operating, the duct fun

operates.

(1) Connect the optional multiple remote controller

adapter(PAC-SA88HA-E) to the connector CN51
on the indoor controller board.

(2) Drive the relay after connecting the 12V DC relay

between the Yellow and Orange connector lines.

(w) Use a relay of 1W or smaller.

MB: Electromagnetic switch power relay for duct fan.

X: Auxiliary relay (12V DC LY-1F)

How to read curves

Q…Designed amount of fresh air intake

<m

3

/min>

A…Static pressure loss of fresh air

intake duct system with air flow
amount Q <Pa>

B…Forced static pressure at air condi-

tioner inlet with air flow amount Q

<Pa>

C…Static pressure of booster fan with

air flow amount Q <Pa>

D…Static pressure loss increase amount

of fresh air intake duct system for air
flow amount Q <Pa>

E…Static pressure of indoor unit with air

flow amount Q <Pa>

Qa…Estimated amount of fresh air

intake without D <m3/min>

11

4-4. NOISE CRITERION CURVES

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING
FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

PMFY-P20VBM-E
PMFY-P20VBM-E1
PMFY-P20VBM-E#2
PMFY-P20VBM-ER3

High

NOTCH

Medium1
Medium2

Low

35

SPL(dB)

33
30
27

LINE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

PMFY-P25VBM-E
PMFY-P32VBM-E
PMFY-P25VBM-E

1

PMFY-P32VBM-E1
PMFY-P25VBM-E#2
PMFY-P32VBM-E#2
PMFY-P25VBM-ER3
PMFY-P32VBM-ER3

High

NOTCH

Medium1
Medium2

Low

37

SPL(dB)

36
34
32

LINE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

PMFY-P40VBM-E
PMFY-P40VBM-E1
PMFY-P40VBM-E#2
PMFY-P40VBM-ER3

High

NOTCH

Medium1
Medium2

Low

39

SPL(dB)

37
35
33

LINE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)

UNIT

1.5m

MICROPHONE

CEILING