Mitsubishi HWE06020 Service Manual

Air-Conditioners

TECHNICAL & SERVICE MANUAL

Models

PEFY-P20VMS-E, PEFY-P40VMS-E
PEFY-P25VMS-E, PEFY-P50VMS-E
PEFY-P32VMS-E, PEFY-P63VMS-E

2006

For use with R410A, R407C, & R22

Safety Precautions

Read before installation and performing electrical work

Thoroughly read the following safety precautions prior to installation.
Observe these safety precautions for your safety.
This equipment may have adverse effects on the equipment on the same power supply system.
Contact the local power authority before connecting to the system.

Symbol explanations

WARNING

This symbol indicates that failure to follow the instructions exactly as stated poses the risk of serious injury or death.

CAUTION

This symbol indicates that failure to follow the instructions exactly as stated poses the risk of serious injury or dam-

age to the unit.

Indicates an action that must be avoided.

Indicates important instructions.

Indicates a parts that requires grounding.

Indicates that caution must be taken with rotating parts. (This symbol is on the main unit label.) <Color: Yellow>

Indicates that the parts that are marked with this symbol pose a risk of electric shock. (This symbol is on the main
unit label.) <Color: Yellow>

WARNING

Carefully read the labels affixed to the main unit.

WARNING

Ask your dealer or a qualified technician to install the unit.

Improper installation by the user may result in water leak­age, electric shock, or fire.

Properly install the unit on a surface that can withstand its
weight.

Unit installed on an unstable surface may fall and cause in­jury.

Only use specified cables. Securely connect each cable so
that the terminals do not carry the weight of the cable.

Improperly connected cables may produce heat and start a
fire.

Take appropriate safety measures against wind gusts and
earthquakes to prevent the unit from toppling over.

Improper installation may cause the unit to topple over and
cause injury or damage to the unit.

Only use accessories (i.e., air cleaners, humidifiers, electric
heaters) recommended by Mitsubishi Electric.

Do not make any modifications or alterations to the unit.
Consult your dealer for repair.

Improper repair may result in water leakage, electric shock,
or fire.

Do not touch the heat exchanger fins with bare hands.

The fins are sharp and pose a risk of cuts.

In the event of a refrigerant leak, thoroughly ventilate the
room.

If gaseous refrigerant leaks out and comes in contact with
an open flame, toxic gases will be generated.

Properly install the unit according to the instructions in the
Installation Manual.

Improper installation may result in water leakage, electric
shock, or fire.

Have all electrical work performed by an authorized electri­cian according to the local regulations and the instructions
in this manual. Use a dedicated circuit.

Insufficient power supply capacity or improper installation
of the unit may result in malfunctions of the unit, electric
shock, or fire.

i

WARNING

Keep electrical parts away from water.

Wet electrical parts pose a risk of electric shock, smoke, or
fire.

Securely attach the control box cover.

If the cover is not installed properly, dust or water may infil­trate and pose a risk of electric shock, smoke, or fire.

Only use the type of refrigerant that is indicated on the unit
when installing or relocating the unit.

Infiltration of any other types of refrigerant or air into the unit
may adversely affect the refrigerant cycle and may cause
the pipes to burst or explode.

When installing the unit in a small space, take appropriate
precautions to prevent leaked refrigerant from reaching the
limiting concentration.

Leaked refrigerant gas will displace oxygen and may cause
oxygen starvation. Consult your dealer before installing the
unit.

Consult your dealer or a qualified technician when moving
or reinstalling the unit.

Improper installation may result in water leakage, electric
shock, or fire.

After completing the service work, check for a refrigerant
leak.

If leaked refrigerant is exposed to a heat source, such as a
fan heater, stove, or electric grill, toxic gases will be gener­ated.

Do not try to defeat the safety features of the unit.

Forced operation of the pressure switch or the temperature
switch by defeating the safety features for these devices, or
the use of accessories other than the ones that are recom­mended by Mitsubishi Electric may result in smoke, fire, or
explosion.

Consult your dealer for proper disposal method.

Do not use a leak detection additive.

Precautions for handling units for use with R410A

CAUTION

Do not use the existing refrigerant piping.

A large amount of chlorine that may be contained in the re­sidual refrigerant and refrigerator oil in the existing piping
may cause the refrigerator oil in the new unit to deteriorate.

Use refrigerant piping materials made of phosphorus deox­idized copper. Keep the inner and outer surfaces of the
pipes clean and free of such contaminants as sulfur, oxides,
dust, dirt, shaving particles, oil, and moisture.

Contaminants in the refrigerant piping may cause the refrig­erator oil to deteriorate.

Store the piping materials indoors, and keep both ends of
the pipes sealed until immediately before brazing. (Keep el­bows and other joints wrapped in plastic.)

Infiltration of dust, dirt, or water into the refrigerant system
may cause the refrigerator oil to deteriorate or cause the
compressor to malfunction.

Use a small amount of ester oil, ether oil, or alkyl benzene
to coat flares and flanges.

Infiltration of a large amount of mineral oil may cause the re­frigerator oil to deteriorate.

Charge the system with refrigerant in the liquid phase.

If gaseous refrigerant is drawn out of the cylinder first, the
composition of the remaining refrigerant in the cylinder will
change and become unsuitable for use.

Only use R410A.

The use of other types of refrigerant that contain chloride
may cause the refrigerator oil to deteriorate.

Use a vacuum pump with a check valve.

If a vacuum pump that is not equipped with a check valve is
used, the vacuum pump oil may flow into the refrigerant cy­cle and cause the refrigerator oil to deteriorate.

Prepare tools for exclusive use with R 410A. Do not use the
following tools if they have been used with the conventional
refrigerant: gauge manifold, charging hose, gas leak detec­tor, check valve, refrigerant charge base, vacuum gauge,
and refrigerant recovery equipment.

If the refrigerant or the refrigerator oil that may be left on these
tools are mixed in with R410A, it may cause the refrigerator oil
in the new system to deteriorate.
Infiltration of water may cause the refrigerator oil to deteriorate.
Leak detectors for conventional refrigerants will not detect an
R410A leak because R410A is free of chlorine.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of the refrigerant
in the cylinder will change and become unsuitable for use.

Exercise special care when handling tools for use with R410A.

Infiltration of dust, dirt, or water into the refrigerant system
may cause the refrigerator oil to deteriorate.

ii

I Features

[1] Features.................................................................................................................................... 1

II Components and Functions

[1] Components and Functions...................................................................................................... 2

III Specfications

[1] Specifications............................................................................................................................ 4

1.Specfications .......................................................................................................................... 4

2.Electrical component specifications........................................................................................ 6

IV Outlines and Dimensions

[1] Outlines and Dimensions.......................................................................................................... 7

V Wiring Diagram

[1] Wiring Diagram ......................................................................................................................... 8

VI Refrigerant System Diagram

[1] Refrigerant system diagram.................................................................................................... 10

VII Troubleshooting

[1] Troubleshooting ...................................................................................................................... 11

1.Check methods..................................................................................................................... 11

2.DC fan motor (fan motor/indoor control board)..................................................................... 15

3.Address switch setting .......................................................................................................... 16

4.Voltage test points on the control board ............................................................................... 17

5.Dipswitch setting (Factory setting)........................................................................................ 18

CONTENTS

VIII Disassembly Procedure

[1] Disassembly Procedure.......................................................................................................... 20

1.Control box ........................................................................................................................... 20

2.Thermistor (Intake air) .......................................................................................................... 21

3.Drainpan ............................................................................................................................... 22

4.Thermistor (Gas pipe) (Liquid pipe) ...................................................................................... 23

5.Fan and fan motor ................................................................................................................ 24

6.Bearing ................................................................................................................................. 25

7.Heat exchanger .................................................................................................................... 26

I Features

[1] Features

Model Cooling capacity/Heating capacity

[ I Features ]

kW

PEFY-P20VMS-E 2.2/2.5

PEFY-P25VMS-E 2.8/3.2

PEFY-P32VMS-E 3.6/4.0

PEFY-P40VMS-E 4.5/5.0

PEFY-P50VMS-E 5.6/6.3

PEFY-P63VMS-E 7.1/8.0

- 1 -

[ II Components and Functions ]

II Components and Functions

[1] Components and Functions

1. Indoor (Main) Unit

(A)

(A)

(A) Air

2. Remote Controller
[PAR-21MAA]

Once the operation mode is selected, the unit will remain in the selected mode until changed.

(1) Remote Controller Buttons

1 [Set Temperature] Button 7 [Vane Control] Button
2 [Timer Menu] Button 8 [Ventilation] Button

[Monitor/Set] Button [Operation] Button

3 [Mode] Button 9 [Check/Clear] Button

[Back] Button 10 [Test Run] Button

4 [Timer On/Off] Button 11 [Filter] Button

[Set Day] Button [ ] Button

5 [Louver] Button 12 [ON/OFF] Button

[Operation] Button 13 Position of built-in room thermistor

6 [Fan Speed] Button 14 [Set Time] Button

Keep the remote controller out of direct sunlight to ensure accurate measurement of room temperature.
The thermistor at the lower right-hand section of the remote controller must be free from obstructions to ensure accurate mea-

surement of room temperature.

- 2 -

(2) Remote Controller Display

A Current time/Timer time I Louver swing

B Centralized control indicator J Ventilation

C Timer OFF indicator K Filter sign

D Timer mode L Sensor position

E Operation mode display: COOL, DRY, AUTO,

FAN, HEAT

M Room temperature

[ II Components and Functions ]

F Function Lock indicator N Vane setting

G Preset temperature O Fan speed

H Power indicator

- 3 -

[ III Specfications ]

III Specfications

[1] Specifications

1. Specfications

Model PEFY-P20VMS-E PEFY-P25VMS-E PEFY-P32VMS-E

Power supply Voltage V 220-240

Frequency Hz 50/60

Cooling capacity kW 2.2 2.8 3.6

Heating capacity kW 2.5 3.2 4.0

Power consumption Cooling kW 0.08/0.08 0.08/0.08 0.09/0.09

Heating kW 0.06/0.06 0.06/0.06 0.07/0.07

Current consumption Cooling A 0.39/0.39 0.39/0.39 0.44/0.44

Heating A 0.28/0.28 0.28/0.28 0.33/0.33

External finish (Munsel No.) Galvanized

Dimensions Height mm 200

Width mm 900

Depth mm 700

Net weight kg 23 23 23

Heat exchanger Cross fin (Aluminium fin and copper tube)

Fan Type Sirocco fan x 3

3

Airflow rate

/min 6.0-7.0-8.0 6.0-7.0-8.0 7.5-8.5-10.0

m

(Low-Mid-High)

External static pressure Pa 5/15/35/50 5/15/35/50 5/15/35/50

Motor Type DC brushless motor

Output kW 0.096

Air filter PP Honeycomb fabric (washable)

Refrigerant pipe dimen­sions

Drain pipe dimensions mm

Gas (Brazed connec­tion)

Liquid (Brazed connec­tion)

mm
[in.]

mm
[in.]

ø12.7 [ø1/2]

ø6.35 [ø1/4]

O.D. 32 [1-9/32]

[in.]

Operating noise
(Low-Mid-High)

5Pa dB (A) 21-23-26 21-23-26 23-26-29

15Pa 22-25-27 22-25-27 25-28-30

35Pa 25-27-30 25-27-30 27-29-33

50Pa 26-29-32 26-29-32 28-31-35

Note: Maximum capacity of the unit under the following conditions
<Cooling> Indoor temperature: 27°CDB/19°CWB (81°FDB/66°FWB Outdoor temperature: 35°CDB (95°FDB)
<Heating> Indoor temperature: 20°CDB (68°FDB) Outdoor temperature: 7°CDB/6°CWB (45°FDB/43°FWB)

- 4 -

[ III Specfications ]

Model PEFY-P40VMS-E PEFY-P50VMS-E PEFY-P63VMS-E

Power supply Voltage V 220-240

Frequency Hz 50/60

Cooling capacity kW 4.5 5.6 7.1

Heating capacity kW 5.0 6.3 8.0

Power consumption Cooling kW 011/0.11 0.13/0.13 0.14/0.14

Heating kW 0.09/0.09 0.11/0.11 0.12/0.12

Current consumption Cooling A 0.53/0.53 0.63/0.63 0.68/0.68

Heating A 0.42/0.42 0.52/0.52 0.57/0.57

External finish (Munsel No.) Galvanized

Dimensions Height mm 200

Width mm 900 1100

Depth mm 700 700

Net weight kg 24 24 28

Heat exchanger Cross fin (Aluminium fin and copper tube)

Fan Type Sirocco fan x 3 Sirocco fan x 4

3

Airflow rate

/min 8.0-9.5-11.0 9.5-11.0-13.0 12.0-14.0-16.5

m

(Low-Mid-High)

External static pressure Pa 5/15/35/50 5/15/35/50 5/15/35/50

Motor Type DC brushless motor

Output kW 0.096

Air filter PP Honeycomb fabric (washable)

Refrigerant pipe dimen­sions

Drain pipe dimensions mm

Gas (Brazed connec­tion)

Liquid (Brazed connec­tion)

mm
[in.]

mm
[in.]

ø12.7 [ø1/2] R410A: ø12.7 [ø1/2]

R22: ø15.88 [ø5/8]

ø6.35 [ø1/4] R410A: ø6.35 [ø1/4]

R22: ø9.52 [ø3/8)

O.D. 32 [1-9/32]

[in.]

Operating noise
(Low-Mid-High)

5Pa dB (A) 26-28-30 29-31-34 29-32-35

15Pa 28-30-33 30-32-35 30-33-36

30Pa 30-32-35 31-34-37 31-35-39

50Pa 31-33-36 32-34-38 32-36-40

Note: Maximum capacity of the unit under the following conditions
<Cooling> Indoor temperature: 27°CDB/19°CWB (81°FDB/66°FWB Outdoor temperature: 35°CDB (95°FDB)
<Heating> Indoor temperature: 20°CDB (68°FDB) Outdoor temperature: 7°CDB/6°CWB (45°FDB/43°FWB)

ø15.88 [ø5/8]

ø9.52 [ø3/8]

- 5 -

2. Electrical component specifications

[ III Specfications ]

Component Sym-

bol

Room temperature ther­mistor

Liquid pipe thermistor TH22 Resistance 0°C/15k , 10°C/9.6k , 20°C/6.3k , 25°C/5.4k , 30°C/4.3k , 40°C/3.0k

Gas pipe thermistor TH23 Resistance 0°C/15k , 10°C/9.6k , 20°C/6.3k , 25°C/5.4k , 30°C/4.3k , 40°C/3.0k

Fuse FUSE 250V 6.3A

Fan motor 4-pole, Output 96W SIC-70CW-D896-1

Linear expansion valve LEV 12VDC Stepping motor drive port diameter ø3.2 (0~2000 pulse)

Power supply terminal
block

Transmission terminal
block

Drain float switch DS Open/short detection

TH21

TB2

TB5

TB15

PEFY-

P20VMS-E

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

PEFY-

P25VMS-E

Initial contact resistance 500 m or less

PEFY-

P32VMS-E

(L, N, ) 330V 30A

(1, 2), (M1, M2, S) 250V 20A

PEFY-

P40VMS-E

PEFY-

P50VMS-E

PEFY-

P63VMS-E

- 6 -

[ IV Outlines and Dimensions ]

IV Outlines and Dimensions

[1] Outlines and Dimensions

1. PEFY-P20,25,32,40,50,63VMS-E

550 mm max.

Access door

777

3737

10012

157.520
37

100

157.520
37

12

50

88

G

50

450

450

50 150

Note 2

300 min.

(A)

Air filter

106020

86020

C

A90

Air

inlet

Access door

Ceiling surface

(B)

20 mm min.

20 mm min.

300 min max.

175mm 5mm

Air filter

100 9=90088

100

B (Suspension bolt pitch)23

100

88

12 88100 7=700

Air filter

20- 2.9

Drain hose (I.D. 32)

<accessory>

(Actual length)

Model: P63(Note 3)

12

24- 2.9

Knockout hole 27

Knockout hole 27

Suspension bolt hole

4-14 30 Slot

Control box

(Transmission cable)

(Power supply cable)

170

102

48

Drain pump

200

*1 : R410A outdoor unit

*2 : R407C,R22 outdoor unit

6.35

2

*1

12.7

12.7 6.35

Gas pipe Liquid pipe

1

*1

G

1000

Terminal block (Transmission)

Terminal block (Power supply)

F

800

E

9

9.52

*2

15.88

*2

9.5215.88

1200

1000

11

(O.D. 32)

Drain pipe

67723

700

625 (Suspension bolt pitch)

270

49

10

Air

outlet

D (Duct)

15

100

100

30 100 (E-1)=F

20

57

10

100 25

150 (Duct) 23

Drain pipe (O.D. 32)

(Spontaneous draining)

70116

270

2 2- 2.9

2 E- 2.9

Refrigerant pipe

25

2

Brazed connection (liquid)

Refrigerant pipe

1

(Brazed connection) (gas)

(A) Space required for service and maintenance.

(B) Provide an access door for maintenance at the bottom.

Note 1 Use M10 suspension bolts. (not supplied)

2 Provide an access door for maintenance at the bottom.

3 The dimensions in the table are those of the PEFY-P20~50VMS-E models, which have 3 fans. The PEFY-

P63VMS-E model has 4 fans.

4 To connect an intake duct, uninstall the air filter on the unit, and install a locally procured air filter on the intake

duct on the intake side.

D

860

1060

C

998

1198

B

952

1152

900

1100

Model A

PEFY-P20, 25, 32, 40VMS-E

PEFY-P50VMS-E

PEFY-P63VMS-E

- 7 -

V Wiring Diagram

[1] Wiring Diagram

1. PEFY-P20,25,32,40,50,63VMS-E

1351213248132 4567

DSA

I.B.

CND

(Black)

ZNR02

[ V Wiring Diagram ]

PULL BOX

FUSE (16A)

BREAKER (16A)

220, 230, 240V 50/60Hz

L1:PEFY-P63VMS-E only

TO NEXT INDOOR UNIT

TB2

N

L1

CNP

(Blue)

X1

13

U

FUSE

U

ZNR01

CNMF

L

POWER SUPPLY

M

Drain pump

M

INSIDE THE CONTROL BOX

CN2M

SW2SW4SW3

CN42CN81CN32

(Blue)

ON

OFF

(Red)

(Red)

1

SWE

LED2

(Blue)

CN3A

3

310 340VDC

Rectified circuit

CN90

1

(Red)

CN27

CN60

432

LED1

(Green)

6

5

(Red)

CN20CN4FCN44CN41CN52 CN51

t

1324 12 14567

FSTH22 TH23 TH21

4231

tt

M

LEV Fan motor

TB15

12

S(SHIELD)

M2

M1

TB5

TO MA REMOTE

CONTROLLER

A.B.

132481324567

- 8 -

CN62CN82

SW1

SW7

1
0
9

1
0
9

2
1
0
F

E

3

2

7

8

3

2

7

8

4

3

5

B

D

C

4

5

6

SW11

4

5

6

SW12

6

7
8
9

A

SW14

SW5

SWC

SWA

(1’s digit)

(10’s digit)

(Connection No.)

TO OUTDOOR UNIT

BC CONTROLLER

REMOTE CONTROLLER

[ V Wiring Diagram ]

Table.1 SYMBOL EXPLANATION

SYM-

BOL

I.B. Indoor control board CN32 Connector (Remote switch) SW4

A.B. Address board CN41 Connector (HA terminal-A) SWE

TB2 Power supply terminal block CN51 Connector (Centralized con-

TB5 Transmission terminal block CN52 Connector (Remote display) SW5

TB15 Transmission terminal block CN90 Connector (Wireless) SW7

FUSE Fuse 250ACV 6.3A FS Float switch SW11

ZNR01,02Varistor TH21 Thermistor (inlet air) SW12

DSA Arrester TH22 Thermistor (liquid pipe) SW14

X1 Aux. relay TH23 Thermistor (gas pipe) SWA

NAME SYM-

BOL

trol)

NAME SYM-

BOL

(I.B.)

(I.B.)

SW1

(A.B.)

(A.B.)

(A.B.)

(A.B.)

(A.B.)

(A.B.)

(A.B.)

NAME

Switch (function setting)

Connector (emergency opera­tion)

Switch (function setting)

Switch (function setting)

Switch (function setting)

Switch (For setting the 1's digit
in the address)

Switch (For setting the 10's
digit in the address)

Switch (connection No.set­ting)

Switch (static pressure set­ting)

L1 AC reactor (Power factor im-

provement)

CN27 Connector (Damper) SW3

Note 1 Wiring to TB2, TB5, and TB15 indicated by the double-dashed lines is on-site work.

2 terminal bed, connector.

SW2
(I.B.)

(I.B.)

Switch (capacity code setting) SWC

(A.B.)

Switch (function setting)

Switch (static pressure set­ting)

- 9 -

VI Refrigerant System Diagram

[1] Refrigerant system diagram

[ VI Refrigerant System Diagram ]

(A)

(B)

(G)

(D)

(H)

(C)

(F)

(I)

(A) Gas pipe thermistor TH23

(B) Gas pipe

(C) Liquid pipe

(D) Brazed connections

(E) Strainer (#100 mesh)

(F) Linear expansion valve

(G) Liquid pipe thermistor TH22

(H) Heat exchanger

(I) Room temperature thermistor TH21

Capacity PEFY-P20, 25, 32, 40VMS-E PEFY-P50VMS-E PEFY-P63VMS-E

Gas pipe ø12.7 [1/2] R410A: ø12.7 [1/2]

Liquid pipe ø6.35 [1/4] R410A: ø6.35 [1/4]

(E)(E)

ø15.88 [5/8]

R22: ø15.88 [5/8]

ø9.52 [3/8]

R22: ø9.52 [3/8]

- 10 -

[ VII Troubleshooting ]

VII Troubleshooting

[1] Troubleshooting

1. Check methods

1. Component and check points
(1) Thermistor

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

Disconnect the connector and measure the resistance between terminals with a tester.
(Ambient temperature 10°C - 30°C)

Normal Abnormal

4.3k - 9.6k Open or short

(Refer to the thermistor characteristic graph below.)

1) Thermistor characteristic graph

Low-temperature thermistor

Room temperature thermistor (TH21)
Liquid pipe thermistor (TH22)
Gas pipe thermistor (TH23)
Drain sensor (DS)

50

Thermistor R
Multiplier of B = 3480 k 2%

Rt = 15 exp { 3480( ) }

= 15 k 3%

0

1

273+t

1

273

0°C 15k
10°C 9.6k
20°C 6.3k
25°C 5.2k

40

30

(B)

20

30°C 4.3k
40°C 3.0k

(A) Temperature (°C)

10

(B) Resistance (k )

0

-20 -10 0 10 20 30 40 50

(A)

(2) Fan motor (CNMF)

Refer to the page on "DC fan motor (fan motor/indoor control board)."

(3) Linear expansion valve

Disconnect the connector, and measure the resistance between terminals with a tester.
Refer to the next page for details.

CN60

(F)

LEV

(E)

(D)

(C)

(B)

(A)

1
2
3
4
5
6

1-5 2-6 3-5 4-6 Open or short

White-Red Yellow-Brown Orange-Red Blue-Brown

(A) Brown (D) Orange

(B) Red (E) Yellow

(C) Blue (F) White

Normal Abnormal

200 k 10%

- 11 -

[ VII Troubleshooting ]

1) Summary of linear expansion valve (LEV) operation

The LEV is operated by a stepping motor, which operates by receiving a pulse signal from the indoor control board.
The LEV position changes in response to the pulse signal.

Indoor control board and LEV connection

(G)

12VDC

(J)

(C)

4

(A)

6

(E)

2

3

(F)

M

5

1

(D)

(B)

(A) Brown (F) White

(B) Red (G) Control board

(C) Blue (H) Connection (CN60)

(D) Orange (I) Drive circuit

(E) Yellow (J) Linear expansion valve

Pulse signal output and valve operation

Phase

number

1234

Output pulse

ø1 ON OFF OFF ON

ø2 ON ON OFF OFF

ø3 OFF ON ON OFF

ø4 OFF OFF ON ON

(A)

(B)

(C)

(D)

(E)

(F)

(H)

6

5

4

3

2

1

(I)

The output pulse changes in the following order:
When the valve closes 1 -> 2 -> 3 -> 4 -> 1

When the valve opens 4 -> 3 -> 2 -> 1 -> 4

When the valve position remains the same, all output signals will be OFF.
If any output signal is missing or if the signal remains ON, the motor vibrates and makes clicking noise.

- 12 -

[ VII Troubleshooting ]

2) LEV operation

(a) Close

(b) Open

(c) Fully open valve (2000 pulses)

(d) No. of pulses

(a)

(f)

(b)

(c)

(d)

(e)

(e) Extra tightning (80 - 100 pulse)

(f) Valve opening degree

When the power is turned on, a pulse signal of 2200 pulses is output (valve closure signal), to bring the valve to position A.
When the valve is operating normally, it is free of vibration noise. If the valve locks or when it goes from point E to A in the

figure, it makes louder noise than would be heard when there is an open phase.

Check for abnormal sound/vibration by placing the metal tip of a screwdriver against the valve and the handle side against

your ear.

3) Troubleshooting

Symptom Checking Criteria Remedy

Circuit failure on
the microcomputer

Disconnect the connectors on the control board, and connect LEDs to test the cir­cuit as shown below.

6

5

4

3

2

1 k

LED

1

Replace the indoor
control board if driv­ing circuit failure is
detected.

Pulse signals are output for 10 seconds when the main power is turned on. If there
are LEDs that do not light up at all or remain lit after the pulses are turned off, there
is a problem with the driving circuit.

Locked LEV The motor will idle and make small clicking noise if it is run while the LEV is locked.

Replace the LEV.
If this clicking noise is heard both when the valve is fully closed and while it is being
opened, it indicates a problem.

Disconnected or
shorted LEV motor

easure the resistance between the coils with a tester (red-white, red-orange,
brown-yellow, brown-blue). The normal range of resistance is 150 10%

Replace the LEV.

coils

- 13 -

[ VII Troubleshooting ]

Symptom Checking Criteria Remedy

Valve closure fail­ure (leaky valve)

To check the LEV on the indoor unit, check the indoor unit liquid pipe temperature
that appears on the operation monitor on the outdoor unit's multi control board while
operating the indoor unit in question in the FAN mode and the other indoor units in
the cooling mode.

(A) Termistor (TH21)

(A)

LEV

Normally, the LEV is fully closed while the unit is in the FAN mode. If the valve is
leaky, liquid pipe thermistor reading will be lower than normal. If it is significantly
lower than the inlet temperature on the remote controller, valve closure failure is
suspected. If the amount of leakage is insignificant, replacement of LEV is unnec­essary unless it is causing a problem.

Misconnections of
connectors or con­tact failure

(4) Drain-up mechanism

Measure the resistance between the terminals with a tester.
(coil temperature 20°C)

Perform a visual check for disconnected connectors.
Perform a visual check of lead wire color.

Replace the LEV if

the amount of leak-

age is great.

Disconnect the con-

nectors on the con-

trol board and

perform a continuity

test.

Normal Abnormal

1

3

(5) Drain float switch (CN4F)

Disconnect the connector, and measure the resistance between terminals with a tester.

(A)

1
2
3
4

Position of the moving part Normal Abnormal

Up Short (any position but short)

Down Open (any position but open)

340 Open or short

(A) Moving part

(B) Switch

(B)

(C)

(A)

(C) Magnet

- 14 -

[ VII Troubleshooting ]

2. DC fan motor (fan motor/indoor control board)

1. CAUTION

A high voltage is applied to the connector for connection to the fan motor (CNMF).
Do not unplug the connector CNMF with the unit energized to avoid damage to the indoor control board and fan motor.

2. Troubleshooting
Symptom: Indoor unit fan does not run.

Check fan motor connector contact
(CNMF).

Is the fan motor connector

No

Fix the connection.

(CNMF) fully inserted?

Yes

Check the power supply.

Measure the voltage at the indoor control board.

310 - 340VDC (same with the voltage between fan connector 1 (+) and 4(-))

Power supply voltage

V

DC

15VDC (same with the voltage between fan connector 5 (+) and 4(-))

1 - 6.5VDC (same with the voltage between fan connector 6 (+) and 4(-))

[Values for Vsp are the values that are measured with the fan motor in operation.
Vsp is 0V when the fan motor is stopped.]

Is the voltage within the

No

Replace the indoor control board.

normal range?

Yes

Check the fan motor position thermistor signal.
Get the motor to make a full rotation or more, and measure the voltage at the test point

FG.

V
(same with the voltage between fan connector 7 (+) and 4(-))

Are 0VDC and 15VDC

No

Replace the motor.

displayed alternately?

Yes

Replace the indoor control board.

- 15 -

3. Address switch setting

Make sure that power to the unit is turned off.

[ VII Troubleshooting ]

(A)

(B)

ON

OFF

(A) Indoor unit control board

(B) Factory setting (all models)

1. When using an ME remote controller, set the address with the rotary switches (SW11, SW12).
Address setting is not required when the unit remote controller is used.

On-site address setting is required for the indoor units to run.

2. Address settings vary in different systems.

Refer to the section on address setting in the outdoor unit installation manual.

ON

OFF

3. Address is set with a combination of SW12 (10's digit) and SW11 (1's digit).

To set the address to "3," set SW12 to "0" and SW11 to "3."
To set the address to "25," set SW 12 to "2" and SW 11 to "5."

- 16 -

[ VII Troubleshooting ]

4. Voltage test points on the control board

1. PEFY-P20, 25, 32, 40, 50, 63VMS-E

CND

С25(*1)

CN2M

SWE

SW2

SW4

Fuse

CNP

CNMF

C951(*1)

PC941(*1)

LED1

CN3C
CN20

CND Power supply voltage (220 - 240VAC)

CN2M For M-NET transmission cable con-

nection (24 - 30VDC)

SWE Emergency operation

SW2 Capacity setting

SW4 Function setting

CN42 For address board connection

SW3 Function setting

CN81 For address board connection

CN32 Remote start/stop adapter

CN3A For MA remote controller cable con-

nection
(10 - 13 VDC (Between 1 and 3.))

CN52 Remote display

CN51 Centralized control

CN41 JAMA standard HA terminal A

CN44 Thermistor (liquid/gas temperature)

CN4F Float thermistor

CN20 Thermistor (Inlet temperature)

CN3C Indoor-outdoor transmission

(0 - 24VDC)

CNMF Fan motor output

1 - 4: 310 - 340 VDC
5 - 4: 15 VDC
6 - 4: 0 - 6.5 VDC
7 - 4: Stop 0 or 15 VDC

Run 7.5 VDC
(0 - 15 pulse)

CNP Drain-up mechanism output (200VAC)

CN42

SW3

CN81

CN32

LED2 CN3A CN60

CN4F

CN44

CN41

CN51

CN52

(*1)

Voltage on the (-) side of PC941 and

V

FG

C25
(Same with the voltage between 7 (+)
and 4 (-) of CNMF)

VCCVoltage between the C25 pins

15 VDC
(Same with the voltage between 5 (+)
and 4 (-) of CNMF)

Vsp Voltage between the C951 pins

0VDC (with the fan stopped)
1 - 6.5VDC (with the fan in operation)
(Same with the voltage between 6 (+)
and 4 (-) of CNMF)

- 17 -

5. Dipswitch setting (Factory setting)

1. Function setting

(1) SW1

Switch position Function Switch setting

ON OFF

1 Active Thermistor (Intake air ther-

mistor)

2 Filter clogging detection Available Unavailable

3 Filter life 2500 hr 100 hr

4 Outdoor air intake Enabled Disabled

5 Remote display Thermo-ON signal Fan output

6 Humidifier operation During heating mode During heating operation

7 Fan speed Low Very low

8 Fan speed at heating Thermo-OFF Preset fan speed Follows the setting of SW1-7

9 Auto restart after power failure Enabled Disabled

10 Power start/stop Enabled Disabled

1) Adress board

Built-in thermistor on the remote
controller

Indoor unit

[ VII Troubleshooting ]

Factory setting

(2) SW3

Switch position Function Switch setting

ON OFF

1 Unit type Cooling only Heat pump

2- - -

3- - -

4- - -

5- - -

6- - -

7- - -

8 Heating 4-deg up Disabled Enabled

1) Indoor control board

Dipswitch settings must be made while the unit is stopped.

Factory setting

2. Capacity code setting

(1) SW2

1) Indoor control board

Dipswitch settings must be made while the unit is stopped.
Factory setting
The switches are set to correspond to the unit capacity.

PEFY-P20VMS-E PEFY-P25VMS-E PEFY-P32VMS-E PEFY-P40VMS-E PEFY-P50VMS-E PEFY-P63VMS-E

- 18 -

[ VII Troubleshooting ]

3. Model setting

(1) SW4

1) Indoor control board

Dipswitch settings must be made while the unit is stopped.

Factory setting

Note:
Changes made to the dipswitches SW1, SW2, and SW3 will become effective when the unit comes to a stop (remote controller
off). There is no need to power cycle the unit.

4. External static pressure

(1) SWA, SWC

1) Address board

All models Factory

5Pa

3
2
1

SWA SWC

15Pa

3
2
1

SWA SWC

35Pa

3
2
1

SWA SWC

50Pa

3
2
1

SWA SWC

setting

3
2
1

SWA SWC

(A)

(B)

(A) Option

(B) Standard

Note:
Changes that are made to the dipswitches SWA and SWC immediately become effective regardless of the unit's operation
status (RUN/STOP) or the remote controller status (ON/OFF).

5. 1's and 10's digits

(1) SW11, SW12 (Rotary switch)

The use of a network remote controller (PAR-F27MEA) requires address setting.

1) Address board

Address settings must be made while the unit is stopped.

Factory setting

6. Connection No. setting

(1) SW14 (Rotary switch)

This switch is used when the unit connected to an R2 series of outdoor unit.

1) Address board

Factory setting

Note:
Changes to the dipswitches SW11, SW12, SW14, and SW15 must be made while the unit is stopped and the remote controller
is OFF.

- 19 -

VIII Disassembly Procedure

[1] Disassembly Procedure

1. Control box

Exercise caution when removing heavy parts.

1. Removing the control box cover
(1) Remove the two fixing screws on the cover (A) to remove

it.

[ VIII Disassembly Procedure ]

(A)

Fig.1

Fig.2

- 20 -

[ VIII Disassembly Procedure ]

2. Thermistor (Intake air)

Exercise caution when removing heavy parts.

1. Remove the control box cover according to the procedure
in section [1].

2. Remove the thermistor.

(1) Remove the two fixing screws on the metal base (B) to re-

move it.

(2) Pull out the thermistor holder (C) and thermistor (D) on

the control box.

(B)

Fig.3

Fig.4

P63 model only

(C), (D)

- 21 -

3. Drainpan

Exercise caution when removing heavy parts.

1. Removing the cover

(1) Remove the fixing screws on the cover (E) to remove it.

2. Removing the drainpan

(1) Pull out the drain pan in the direction of the arrow 1.

[ VIII Disassembly Procedure ]

(E)

Fig.5

Note

Drain the water out of the drain pan before removing

it.

To avoid dew condensation, use insulated screws in

the places marked with circles in Figure 7.

Fig.6

(a)

(E)

Fig.7

(a) Insulation material

- 22 -

[ VIII Disassembly Procedure ]

4. Thermistor (Gas pipe) (Liquid pipe)

Exercise caution when removing heavy parts.

1. Remove the drain pan according to the procedure in sec­tion [1].

2. Removing the Heat exchanger cover

(1) Remove the four fixing screws on the heat exchanger cov-

er (F) to remove it.

3. Removing the thermistor

(1) Remove the thermistor (G) from the thermistor holder (H)

on the copper tube.

HEX

(F)

Fig.8

Thermistor size
Liquid pipe: ø8mm
Gas pipe: ø6mm

(G), (H)

Fig.9

- 23 -

5. Fan and fan motor

Exercise caution when removing heavy parts.

1. Removing the filter and the bottom plate

(1) Push down the tab on the filter, and pull out the filter in the

direction of the arrow 1.

Fig.10

(a) Tab

(a)

(a)

[ VIII Disassembly Procedure ]

(a)

(a)

(J)

2. Removing the punching metal

(1) Remove the two fixing screws on the punching metal (K)

to remove it.

3. Removing the fan casing (bottom half)

(1) Squeeze the tabs on the fan casing to remove it in the di-

rection of arrow 2.

4. Removing the motor cable

(1) Remove the motor cable threw the rubber bush.

5. Removing the fan motor and the Sirocco fan

(1) Remove the two motor fixing screws to remove the motor

and the Sirocco fan in the direction of arrow 3.

(a)

(K)

Fig.11

(2) Remove the four fan case fixing screws to take the top

half of the fan casing off.

Fig.12

Fig.13

- 24 -

[ VIII Disassembly Procedure ]

6. Bearing

Exercise caution when removing heavy parts.

1. Removeing the bearing

(1) Remove the two fixing screws on the bearing cover (M) to

remove it.

(2) Remove the two bearing retainer screws to remove the

bearing.

(M)

Fig.14

Fig.15

- 25 -

7. Heat exchanger

Exercise caution when removing heavy parts.

1. Remove the drain pan according to the procedure in section
[1].

2. Remove the heat exchanger cover according to the proce­dure in section [4] 2.

3. Removing the cover

(1) Remove the two fixing screws on the cover (T) to remove it.

[ VIII Disassembly Procedure ]

(T)

Fig.16

4. Removing the Heat exchanger

(1) Remove the fixing screws on the heat exchanger (S) to re-

move it.

(T) Pipe support plate

(S)

Fig.17

- 26 -

Aug. 2006 HWE06020
Printed in Japan

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