Mitsubishi MUZ-FA25VA-E1, MUZ-FA35VA-E1, MUZ-FA25VAH-E1, MUZ-FA35VAH-E1 Service Manual

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Page 1

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

HFC

utilized

R410A

OUTDOOR UNIT

SERVICE MANUAL

Wireless type Models

Revision D:

•PARTS LIST and RoHS PARTS LIST have been changed.

Please void OB372 REVISED EDITION-C

No. OB372

REVISED EDITION-D

MUZ-FA25VA MUZ-FA35VA -

MUZ-FA25VAH MUZ-FA35VAH -

Indoor unit service manual MSZ-FA•VA Series (OB371)

CONTENTS

1. TECHNICAL CHANGES ····································4

2. PART NAMES AND FUNCTIONS······················7

3. SPECIFICATION·················································7

4. NOISE CRITERIA CURVES·······························9

5. OUTLINES AND DIMENSIONS·······················10

6. WIRING DIAGRAM···········································11

7. REFRIGERANT SYSTEM DIAGRAM··············15

8. PERFORMANCE CURVES······························17

9. ACTUA TOR CONTROL····································25

10. SERVICE FUNCTIONS·····································26

11. TROUBLESHOOTING ······································26

12. DISASSEMBLY INSTRUCTIONS·····················45

13. PARTS LIST······················································48

14. RoHS PARTS LIST···········································52

NOTE:

RoHS compliant products have <G> mark on the spec name plate. For servicing of RoHS compliant products, refer to the RoHS Parts List.

Page 2

Page 3

Model Serial number 6. Wiring diagram

11-6.N Check of inverter P.C.board

Change Change

5002651T~ 5000401T~ 5003001T~ 5000401T~

MUZ-FA25VA -

MUZ-FA25VAH MUZ-FA35VA -

MUZ-FA35VAH -

Revision A:

• The inverter P.C.board is integrated.

1.Inverter P.C.board has been changed(Refer to 11-7.1. Inverter P.C.board). FUSE F901 has been equipped. Please refer to serial number listed below regarding this change.

2.Wiring diagram has been added. (Page 12 , 14)

3.Test point diagram and voltage has been added. (Page 43)

Revision B:

• RoHS PARTS LIST has been added.

• 11-2.Failure mode recall function has been changed.

Revision C:

• Defrost finish temperature has been changed. [MUZ-FA35VAH]

Revision D:

•PARTS LIST and RoHS PARTS LIST have been changed.

Page 4

Refrigeration

oil

Refrigerant

New refrigerant

R410A HFC-32: HFC-125 (50%:50%) Pseudo-azeotropic refrigerant

Not included

A1/A1

72.6

-51.4

1.557 64

Non combustible

1730

From liquid phase in cylinder

Possible

Incompatible oil

Non Non

Previous refrigerant

R22

R22 (100%)

Single refrigerant

Included

86.5

-40.8

0.94

44.4

Non combustible

0.055 1700

Gas phase

Possible

Compatible oil

Light yellow

Non

Refrigerant Composition (Ratio) Refrigerant handling Chlorine Safety group (ASHRAE) Molecular weight Boiling point (:) Steam pressure [25:](Mpa) Saturated steam density [25:](Kg/K) Combustibility ODP w1 GWP w2 Refrigerant charge method Additional charge on leakage Kind Color Smell

w1:Ozone Depletion Potential : based on CFC-11 w2 :Global Warming Potential : based on CO

TECHNICAL CHANGES

MUZ-A09YV - ➔ MUZ-FA25VA MUZ-A09YVH - ➔ MUZ-FA25VAH -

E1E1

1.Indication of capacity has been changed.(BTU base➔kW base)

2.Control method between indoor and outdoor unit has been changed.

3.Power supply method has been changed (change to supply from outdoor unit).

4. Terminal block for power supply has been added.

5.Power P.C.board has been changed.

6.Inverter P.C. board has been changed.

7.Refrigerant circuit has been changed.

• Compressor has been changed.(KNB073FBVH➔KNB073FDVH)

• Specification and position of muffler have been changed.

• Path of outdoor heat exchanger has been changed.

• 4-way valve and R.V. coil have been changed.

• Stop valve has been changed.

8.Fan motor has been changed.(AC➔DC)

9.Shape of grille has been changed.

10.Shape of service panel has been changed.

11.Shape of propeller has been changed.

12.Quick Clean Kit has been added.

13.Symbol on terminal block has been changed (to S1/S2/S3).

MUZ-A12YV - ➔ MUZ-FA35VA MUZ-A12YVH - ➔ MUZ-FA35VAH -

E1E1

1.Indication of capacity has been changed.(BTU base➔kW base)

2.Control method between indoor and outdoor unit has been changed.

3.Power supply method has been changed (change to supply from outdoor unit).

4.Power P.C.board has been changed.

5.Terminal block for power supply has been added.

6.Inverter P.C. board has been changed.

7.Refrigerant circuit has been changed.

• Compressor has been changed.(KNB092FAAH➔KNB092FCAH)

• Specification and position of muffler have been changed.

• Outdoor heat exchanger has been changed.

• 4-way valve and R.V. coil have been changed.

• Stop valve has been changed.

8.Fan motor has been changed.(AC➔DC)

9.Shape of grille has been changed.

10.Shape of service panel has been changed.

11.Shape of propeller has been changed.

12.Quick Clean Kit has been added.

13.Symbol on terminal block has been changed (to S1/S2/S3).

INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT

• This room air conditioner adopts HFC refrigerant (R410A) which never destroys the ozone layer.

• Pay particular attention to the following points, though the basic installation procedure is same as that for R22 air

conditioners.

1 As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/

materials are required. Refer to the table below.

2 Take sufficient care not to allow water and other contaminations to enter the R410Arefrigerant during storage and

installation, since it is more susceptible to contaminations than R22.

3 For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant

piping.)

4 Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent

composition change.

Page 5

R410A tools

Can R22 tools be used?

Gas leak detector

R410A has high pressures beyond the measurement range of existing gauges. Port diameters have been changed to prevent any other refrigerant from being charged into the unit.

Hose material and cap size have been changed to improve the pressure resistance.

Dedicated for HFC refrigerant.

6.35 mm and 9.52 mm

Description

Clamp bar hole has been enlarged to reinforce the spring strength in the tool. Provided for flaring work (to be used with R22 flare tool).

Provided to prevent the back flow of oil. This adapter enables you to use vacuum pumps.

It is difficult to measure R410A with a charging cylinder because the refrigerant bubbles due to high pressure and high-speed vaporization

Yes

New

Gauge manifold

Charge hose

Torque wrench

Flare tool Flare gauge

Vacuum pump adapter

Electronic scale for refrigerant charging

No : Not Substitutable for R410A Yes : Substitutable for R410A

No 12.7 mm

NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).

New Specification Current Specification

The incompatible refrigeration oil easily separates from refrigerant and is in the upper layer inside the suction muffler. Raising position of the oil back hole enables to back the refrigeration oil of the upper layer to flow back to the compressor.

Since refrigerant and refrigeration oil are compatible, refrigeration oil goes back to the compressor through the lower position oil back hole.

Compressor

Suction muffler

Oil back hole

refrigeration oil

Refrigerant

Compressor

Suction muffler

Oil back hole

refrigeration oil /Refrigerant

Compressor

The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])

Conversion chart of refrigerant temperature and pressure

(MPa [Gauge])

4.0

3.5

3.0

2.5

2.0

1.5

R410A R22

NOTE : The unit of pressure has been changed to MPa on the

international system of units(SI unit system).

1.0

0.5

Saturated liquid pressure

0.0

-0.5

-30 -20 -10 0 10 20

40 50 60

The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/

(:)

[Gauge])

1.Tools dedicated for the air conditioner with R410A refrigerant

The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools. The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.

Page 6

Electronic scale for refrigerant charging

Outdoor unit

Refrigerant gas cylinder operating valve

Refrigerant gas cylinder for R410A with siphon

Refrigerant (liquid)

Service port

Gauge manifold valve (for R410A)

Union

Liquid pipe Gas pipe

Stop valve

Indoor unit

Charge hose (for R410A)

R410A

Pipe diameter

6.35

9.52

12.7

17 22 26

Dimension of flare nut

R22

17 22 24

2.Refrigerant piping

Wall thickness

Outside diameter

Pipe

For liquid For gas

6.35

9.52

12.7

0.8 mm

Heat resisting foam plastic Specific gravity 0.045 Thickness 8 mm

Insulation material

1 Specifications

Use the refrigerant pipes that meet the following specifications.

• Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm. Never use any pipe with a thickness less than 0.8mm, as the pressure resistance is insufficient.

2 Flaring work and flare nut

Flaring work for R410A pipe differs from that for R22 pipe. For details of flaring work, refer to Installation manual “FLARING WORK”.

3.Refrigeration oil

Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces.

4.Air purge

• Do not discharge the refrigerant into the atmosphere. Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant

circuit.

• Use the vacuum pump for air purging for the purpose of environmental protection.

5.Additional charge

For additional charging, charge the refrigerant from liquid phase of the gas cylinder. If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the outdoor unit. In this case, capacity of the refrigeration cycle decreases or normal operation can be impossible. However, charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.

Page 7

Air inlet

Air outlet

Drain outlet

Piping

Drain hose

(back and side)

PART NAMES AND FUNCTIONS

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

ACCESSORIES

Drain socket

Quick clean kit

MUZ-FA25VA MUZ-FA25VAH MUZ-FA35VA MUZ-FA35VAH

1 1

Capacity

Electrical data

Coefficient of performance(C.O.P)

Compressor

Fan

Special

NOTE : Test conditions are based on ISO 5151

SPECIFICATION

Outdoor model

Function

Power supply

A W %

kg cc

2.5(0.9-3.2)

U-V 1.53 U-W 1.53

810/750

Capacity Rated frequency(Min.-Max.) Dehumidification Air flow ✽1 Power outlet Running current ✽1 Power input ✽1 Power factor ✽1 Starting current (Total) ✽1 Compressor motor current ✽1 Fan motor current ✽1

Model Output Winding resistance(at 20:) Model

Winding

motor

resistance(at 20:) Dimensions WOHOD

Weight Sound level ✽1 Fan speed(High/Low, High/Med./Low) Fan speed regulator Refrigerant filling

remarks

capacity(R410A) Refrigeration oil (Model)

Cooling : Indoor Dry-bulb temperature 27:Wet-bulb temperature 19:

Outdoor Dry-bulb temperature 35:Wet-bulb temperature(24:)

Heating : Indoor Dry-bulb temperature 20:Wet-bulb temperature 15:

Outdoor Dry-bulb temperature 7: Wet-bulb temperature 6:

Refrigerant piping length (one way): 5m

✽1 Measured under rated operating frequency

r/h

K /h

✽1

dB(A)

rpm

MUZ-FA25VA MUZ-FA25VAH

Cooling

Single phase

230V,50Hz

1.4

2,058

2.75 562

3.5

2.44

0.31

4.20

KNB073FDVH

550

V-W 1.53

RC0J50-AL

WHT-BLK 37.5

BLK-RED 37.5

RED-WHT 37.5

800o550o285

33 46

0.90

320 (NEO22)

Heating

3.2(0.9-5.0)

—

1,938

3.25 702

2.97

0.28

4.35

880/810/650

MUZ-FA35VA MUZ-FA35VAH

Cooling

Single phase

230V,50Hz

3.5(1.0-4.1)

2.0

4.05 902

3.72

0.33

3.74

KNB092FCAH

U-V 0.49 U-W 0.49

V-W 0.49

RC0J50-AL WHT-BLK 37.5 BLK-RED 37.5

RED-WHT 37.5

800o550o285

840/760

320 (NEO22)

Heating

4.0(0.9-6.0)

—

2,004

4.35 962

4.6

4.02

0.33

4.02

650

880/800/630

1.05

Page 8

Model

Item

Current transformer Current transformer Smoothing capacitor Diode module Fuse Fuse Defrost heater Intelligent power module Expansion valve coil Reactor Current-detecting resistor Current-detecting resistor Current-limiting resistor Terminal block Relay Relay Relay R.V. coil Heater protector

MUZ-FA25VA

(CT) (CT761, CT781) (

C63A, C63B, C63C

)

(DB61, DB65)

(F61)

(F71, F801,F901w)

(H)

(IPM)

(LEV)

(L61)

(R61)

(R831)

(

R64A, R64B

)

(TB1,TB2)

(X63) (X64) (X66)

(21S4)

(26H)

MUZ-FA25VAH MUZ-FA35VA MUZ-FA35VAH

ETA19Z59BZ ETQ19Z71AY

620+ 420V

D25XB60 250V 20A

250V 3.15A

PS21244-A-203

CAD-MD12ME 12VDC

10A 23.0mH

25m" 5W

5.1" 5W 3P

G5NB-1a

G4A-1A-PS

STF-01AJ503

—

230V 130W

G5NB-1a

Open 45:

—

230V 130W

G5NB-1a

Open 45:

45m" 5W (1 element) 50m" 5W (2 elements)

Specifications and rating conditions of main electric parts

w Refer to Page 3.

Page 9

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

COOLING

FUNCTION

SPL(dB(A))

LINE

High

Med.

FAN SPEED

HEATING

46 46

Test conditions Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)

Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

COOLING

FUNCTION

SPL(dB(A))

LINE

FAN SPEED

HEATING

47 48

Test conditions Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)

Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:

OUTDOORUNIT

MICROPHONE

High Med.

NOISE CRITERIA CURVES

MUZ-FA25VA MUZ-FA25VAH

MUZ-FA35VA MUZ-FA35VAH

Page 10

800

302.5 500 Bolt pitch for installation

150

22.3

Handle

550

280

164.5

99.5

170.5

Service panel

Service port

285

344.5

400

Air in

Air out

Air in

17.5

Bolt pitch for

installation

304~325

Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.35

Gas refrigerant pipe joint Refrigerant pipe (flared) [9.52

43-

35-

2 holes 10X21

Drain hole [33 (MUZ-FA25/FA35VAH)

REQUIRED SPACE

Basically open 100mm or more without any obstruction in front and on both sides of the unit.

350mm or more

200mm or more

100mm or more

Open two sides of left, right, or rear side.

Drain hole [42 (MUZ-FA25/FA35VA)

OUTLINES AND DIMENSIONS

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

Unit: mm

Page 11

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

DB61,DB65

DSA61

F61

F71,F801

IC801

IPM

LEV

SYMBOL

L61

L62,L63MCMF

NR63,NR64

RT61

RT62

RT64

RT65

SYMBOL

R61,R831

R64A,R64B

TB1,TB2

TR821

T801

X63,X64

21S4

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

DIODE MODULE

SURGE ABSORBER

FUSE (T20AL250V)

FUSE (T3.15AL250V)

INTELLIGENT POWER DEVICE

INTELLIGENT POWER MODULE

EXPANSION VALVE COIL

NAME

REACTOR

CMC COIL

COMPRESSOR

OUTDOOR FAN MOTOR

VARISTOR

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMIST OR

FIN TEMPERATURE THERMIST OR

AMBIENT TEMPERA TURE THERMIST OR

NAME

CURRENT-DETECTING RESISTOR

CURRENT-LIMITING RESISTOR

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

~/N

230V~

12-24V

230V 50Hz

CIRCUIT BREAKER

RED

BLU

WHITE

GRN/YLW

TB1

POWER

SUPPLY

R64A

TB2

TO INDOOR UNIT

CONNECTING

RED

BLU

WHT

R64B

WHT

+++

NR63

LDE

GRN

231

CN601

31 24

51 3

CN931 CN932

431212

TB800

RT65 RT64RT62RT61

POWER P.C. BOARD

CN643

CN641

INVERTER P.C. BOARD

CN642

21S4

X63

CN721

IC801

F801

C63C

LD-V

LD-W

LD-U

WHT

BLK

RED RED

BLK

WHT

CN61

IPM

CT781

CT761

CN724

LEV

R61

L61

BLK

R831

TAB63

LD69

DB65

DB61

LD70

TR821

C63B

C63A

BLK

T801

L63

NR64

DSA61

F61

LDY

TAB61

L62

X64

F71

TAB62

GRN

BLK

BLU

CN727CN72

CN725

WIRING DIAGRAM

MUZ-FA25VA (Serial No : ~5002650T) MUZ-FA35VA (Serial No : ~5003000T)

the indoor unit electric wiring diagram for

servicing.

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate.

/: Terminal block, : Connector

NOTE:1. About the indoor side electric wiring refer to

Page 12

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

DB61,DB65

DSA61

F61

F71,F801,F901

IC801

IPM,IC932

LEV

SYMBOL

L61

L62,L63MCMF

NR63,NR64

RT61

RT62

RT64

RT65

SYMBOL

R61,R831

R64A,R64B

TB1,TB2

TR821

T801

X63,X64

21S4

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

DIODE MODULE

SURGE ABSORBER

FUSE (T20AL250V)

FUSE (T3.15AL250V)

INTELLIGENT POWER DEVICE

INTELLIGENT POWER MODULE

EXPANSION VALVE COIL

NAME

REACTOR

CMC COIL

COMPRESSOR

OUTDOOR FAN MOTOR

VARISTOR

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMIST OR

FIN TEMPERATURE THERMIST OR

AMBIENT TEMPERA TURE THERMIST OR

NAME

CURRENT-DETECTING RESISTOR

CURRENT-LIMITING RESISTOR

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

MUZ-FA25VA (Serial No : 5002651T~)

RT61 RT62 RT64RT65

CN642

CN641

CN643

21213412

F901

IC932

CN931

CN932

5 42

NR63

LDE

GRN

725

726

727

231

CN601

TB800

POWER P.C. BOARD

INVERTER P.C. BOARD

21S4

X63

CN721

IC801

F801

C63C

LD-V

LD-W

LD-U

WHT

BLK

RED

BLK

WHT

CN61

IPM

CT781

CT761

724

R61

L61

BLK

R831

TAB63

LD69

DB65

DB61

LD70

TR821

C63B

C63A

BLK

T801

L63

NR64

DSA61

F61

LDY

TAB61

L62

X64

F71

TAB62

GRN

BLK

BLU

+++

~/N

230V

12-24V

230V 50Hz

CIRCUIT BREAKER

RED

BLU

WHITE

GRN/YLW

TB1

POWER

SUPPLY

R64A

TB2

TO INDOOR UNIT

CONNECTING

RED

BLU

WHT

R64B

WHT

LEV

MUZ-FA35VA (Serial No : 5003001T~)

the indoor unit electric wiring diagram for

servicing.

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate.

/: Terminal block, : Connector

NOTE:1. About the indoor side electric wiring refer to

Page 13

MUZ-FA25VAH (Serial No : ~5000400T)

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

DB61,DB65

DSA61

F61

F71,F801HIC801

IPM

LEV

SYMBOL

L61

L62,L63MCMF

NR63,NR64

RT61

RT62

RT64

RT65

R61,R831

SYMBOL

R64A,R64B

TB1,TB2

TR821

T801

X63,X64,X66

21S4

26H

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

DIODE MODULE

SURGE ABSORBER

FUSE (T20AL250V)

FUSE (T3.15AL250V)

DEFROST HEATER

INTELLIGENT POWER DEVICE

INTELLIGENT POWER MODULE

EXPANSION VALVE COIL

NAME

REACTOR

CMC COIL

COMPRESSOR

OUTDOOR FAN MOTOR

VARISTOR

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMIST OR

FIN TEMPERATURE THERMIST OR

AMBIENT TEMPERA TURE THERMIST OR

CURRENT-DETECTING RESISTOR

NAME

CURRENT-LIMITING RESISTOR

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

HEATER PROTECTOR

MUZ-FA35VAH (Serial No : ~5000400T)

BLK

LD-U

DB61

WHT

LD-V

CT761

F801

+++

RED RED

C63C

C63B

C63A

LD70

LD-W

CN61

R61

BLK

WHT

CT781

IPM

T801

LD69

LEV

CN724

IC801

TB800

CN642

431212

CN641

CN643

3 2 1

INVERTER P.C. BOARD

5 3

DB65

R831

LDY

CN725

CN931 CN932

23145

CN601

TR821

5 31

GRN

RT65 RT64RT62RT61

the indoor unit electric wiring diagram for

servicing.

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate.

/: Terminal block, : Connector

NOTE:1. About the indoor side electric wiring refer to

L61

BLK

TAB63

TAB61

TB2

L63

L62

WHT

F61

WHT

230V~

R64A

R64B

BLU

X64

TAB62

NR64 NR63

RED

12-24V

CONNECTING TO INDOOR UNIT

CIRCUIT BREAKER

X63

F71

TB1

21S4

CN721

DSA61

GRN

~/N

230V 50Hz

CN727CN72

X66

LDE

POWER P.C. BOARD

GRN/YLW

POWER

SUPPLY

CN722

RED

BLKBLK

BLK BLK

312

YLW

26H

BLK

WHITE

BLU

RED

Page 14

MUZ-FA25VAH (Serial No : 5000401T~)

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

DB61,DB65

DSA61

F61

F71,F801,F901

IC801

IPM,IC932

LEV

SYMBOL

L61

L62,L63MCMF

NR63,NR64

RT61

RT62

RT64

RT65

R61,R831

SYMBOL

R64A,R64B

TB1,TB2

TR821

T801

X63,X64,X66

21S4

26H

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

DIODE MODULE

SURGE ABSORBER

FUSE (T20AL250V)

FUSE (T3.15AL250V)

DEFROST HEATER

INTELLIGENT POWER DEVICE

INTELLIGENT POWER MODULE

EXPANSION VALVE COIL

NAME

REACTOR

CMC COIL

COMPRESSOR

OUTDOOR FAN MOTOR

VARISTOR

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMIST OR

FIN TEMPERATURE THERMIST OR

AMBIENT TEMPERA TURE THERMIST OR

CURRENT-DETECTING RESISTOR

NAME

CURRENT-LIMITING RESISTOR

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

HEATER PROTECTOR

MUZ-FA35VAH (Serial No : 5000401T~)

RED RED

CN61

LD-W

CT781

R61

IPM

BLK

LD-U

WHT

LD-V

CT761

WHT

LEV

724

CN931

IC932

F901

CN932

3 2 1

5 3

31 24

24 1

the indoor unit electric wiring diagram for

servicing.

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate.

/: Terminal block, : Connector

NOTE:1. About the indoor side electric wiring refer to

BLK

L61

BLK

TAB63

TAB61

F61

TB2

DB61

R64A

R64B

L63

L62

WHT

230V~

F801

+++

TAB62

BLU

C63C

C63B

C63A

LD70

X64

RED

12-24V

IC801

T801

TR821

LD69

TB800

BLK

BLU

21S4

3 4

CN721

X63

F71

DSA61

LDE

NR64 NR63

GRN

GRN/YLW

TB1

CONNECTING TO INDOOR UNIT

CIRCUIT BREAKER

~/N

230V 50Hz

CN642

CN641

21431212

INVERTER P.C. BOARD

CN643

R831

LDY

CN601

CN725

X66

CN722

RED

BLKBLK

BLK BLK

23145

312

YLW

26H

BLK

WHITE

BLU

DB65

CN727CN72

POWER P.C. BOARD

POWER

SUPPLY

RT65 RT64RT62RT61

GRN

RED

Page 15

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperature thermistor RT62

Flared connection

Stop valve (with strainer)

Stop valve (with service port)

Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe [9.52 (with heat insulator)

Refrigerant pipe [6.35 (with heat insulator)

R.V. coil heating ON cooling OFF

Strainer #100

Capillary tube [3.0✕[1.8✕600(✕2)

LEV

Ambient temperature thermistor RT65

Muffler

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperature thermistor RT62

Flared connection

Stop valve (with strainer)

Stop valve (with service port)

Capillary tube [3.0✕[2.0✕240

Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe [9.52 (with heat insulator)

Refrigerant pipe [6.35 (with heat insulator)

LEV

R.V. coil heating ON cooling OFF

Strainer #100

Muffler

Ambient temperature thermistor RT65

Muffler

REFRIGERANT SYSTEM DIAGRAM

MUZ-FA25VA MUZ-FA25VAH

Unit:mm

MUZ-FA35VA MUZ-FA35VAH

Unit:mm

Page 16

Outdoor unit

precharged

14m

270

11m

180

Model

Refrigerant piping length (one way)

Calculation : Xg=30g/mo(Refrigerant piping length(m) - 5)

120

10m

150

12m

210

13m

240

15m

300

20m

450

MUZ-FA25VA MUZ-FA25VAH MUZ-FA35VA MUZ-FA35VAH

900

1,050

Note : Refrigerant piping exceeding 7m requires additional refrigerant charge according to the calculation.

Max. length A

Max. Height

difference

Indoor unit

Outdoor unit

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

Max. length

Max. Height difference

Model

Gas

9.52

Liquid

6.35

Piping size O.D : mm

Refrigerant piping : m

MUZ-FA25VA MUZ-FA25VAH MUZ-FA35VA MUZ-FA35VAH

ADDITIONAL REFRIGERANT CHARGE (R410A:g)

Page 17

PERFORMANCE CURVES8

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions. Since operating conditions vary according to the areas where these units are installed, the following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.

(1) GUARANTEED VOLTAGE

198 ~ 264V, 50Hz

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature : °C WB (2) Indoor outlet air wet-bulb temperature : °C WB (3) Outdoor intake air dry-bulb temperature : °C DB (4) Total input: W (5) Indoor intake air dry-bulb temperature : °C DB (6) Outdoor intake air wet-bulb temperature : °C WB (7) Total input : W Indoor air wet/dry-bulb temperature difference on the left side of the following chart shows the difference between the indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service.

How to measure the indoor air wet-bulb / dry-bulb temperature difference

1. Attach at least 2 sets of wet and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets of wet and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high.

2. Attach at least 2 sets of wet and dry-bulb thermometers to the outdoor air intake. Cover the thermometers to prevent direct rays of the sun.

3. Check that the air filter is cleaned.

4. Open windows and doors of room.

5. Press the EMERGENCY OPERATION switch once (twice) to start the EMERGENCY COOL (HEAT) MODE.

6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.

7. 10 minutes later, measure temperature again and check that the temperature does not change.

}

Cooling

Heating

INDOOR UNIT

Wet and dry-bulb thermometers

8-1. Capacity and the input curves

6.6

6.0

5.5

5.0

4.5

difference (degree)

4.0

Indoor air Wet-bulb temperature

9.7

8.9

8.1

7.3

6.6

5.8

Indoor intake air Wet-bulb temperature (

OUTDOOR UNIT

Wet and dry-bulb thermometers

Indoor intake air W

et-bulb tem

perature (

)

MSZ-FA25VA

MUZ-FA25VA

MUZ-FA25VAH

Rated frequency 57Hz

MSZ-FA35VA

MUZ-FA35VA

MUZ-FA35VAH

Rated frequency 70Hz

Outdoor intake air Dry-bulb temperature (:)

Page 18

Correction of Cooling total input

Input correction factors

The operational frequency of compressor

Correction of Cooling capacity

Capacity correction factors

The operational frequency of compressor

Correction of Cooling capacity

Capacity correction factors

The operational frequency of compressor

Correction of Cooling total input

Input correction factors

The operational frequency of compressor

Correction of Heating total input

The operational frequency of compressor

Correction of Heating capacity

Capacity correction factors

The operational frequency of compressor

Correction of Heating total input

Input correction factors

The operational frequency of compressor

Correction of Heating capacity

Capacity correction factors

The operational frequency of compressor

Input correction factors

MUZ-FA25VA MUZ-FA25VAH

MUZ-FA35VA MUZ-FA35VAH

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

2.0

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

2.0

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

2.0

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

2.0

20.5

18.9

17.4

15.8

14.2

12.6

11.0

9.5

25.6

23.7

21.7

19.7

17.8

15.8

13.8

11.8

Indoor air Dry-bulb temperature

difference (degree)

Indoor intake air Dry-bulb tem

perature (

)

Outdoor intake air Wet-bulb temperature (:)

Indoor intake air Dry-bulb temperature (

Rated frequency 77Hz

Rated frequency 73Hz

MSZ-FA35VA

MUZ-FA35VA

MUZ-FA35VAH

MSZ-FA25VA

MUZ-FA25VA

MUZ-FA25VAH

NOTE:The above broken lines are for the heating operation without any frost and

defrost operation.

8-2. Capacity and input correction by operational frequency of compressor

8-3. Test run operation (How to operate fixed-frequency operation)

1. Press EMERGENCY OPERATION switch to COOL or HEAT mode (COOL : Press once, HEAT : Press twice).

2. Test run operation starts and continues to operate for 30 minutes.

3. Compressor operates at rated frequency in COOL mode or 58Hz in HEAT mode.

4. Indoor fan operates at High speed.

5. After 30 minutes, test run operation finishes and EMERGENCY OPERATION starts (Operation frequency of compressor

6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCY OPERATION switch or any button on

varies). remote controller.

Page 19

8-4. Outdoor low pressure and outdoor unit current

Dry bulb temperature (°C)

Indoor

20.0

14.521

Outdoor 7 6

151220.0

14.5

Wet bulb temperature (°C)

COOL operation

1 Both indoor and outdoor unit are under the

same temperature/humidity condition.

2 Operation : TEST RUN OPERATION (refer to 8-3.)

MUZ-FA25VA MUZ-FA25VAH

(kgf/F [Gauge]) (MPa [Gauge])

1.4

1.2

1.0

0.8

0.6

Outdoor low pressure

0.4

4 2

0.2 15 2050256030

18 32

Ambient temperature(˚C) Ambient humidity(%)

MUZ-FA25VA MUZ-FA25VAH

70 (%)

(kgf/F [Gauge]) (MPa [Gauge])

57Hz

35(˚C)

1.4

1.2

1.0

0.8

0.6

Outdoor low pressure

0.4

4 2

0.2

Ambient temperature(˚C) Ambient humidity(%)

Dry-bulb temperature(:)

MUZ-FA35VA MUZ-FA35VAH

15 2050256030

18 32

MUZ-FA35VA MUZ-FA35VAH

20 25 30 70

70Hz

35(˚C)

70 (%)

Relative humidity(%)

50 60

3.5

2.5

Outdoor unit current(A)

15 2050256030

Ambient temperature(˚C) Ambient humidity(%)

57Hz

35(˚C)

70 (%)

Outdoor unit current(A)

Ambient temperature(˚C) Ambient humidity(%)

HEAT operation

1 Condition :

2 Operation : TEST RUN OPERATION (refer to 8-3.)

MUZ-FA25VA MUZ-FA25VAH

3.0

2.5

2.0

1.5

1.0

0.5

Outdoor unit current (A)

0.0 2

5 10 15 20 25(:)

Ambient temperature(˚C)

58Hz

4.0

3.5

3.0

2.5

2.0

1.5

Outdoor unit current (A)

1.0

15 205025

MUZ-FA35VA MUZ-FA35VAH

5 10 15 20 25(:)

Ambient temperature(˚C)

70Hz

35(˚C)

70 (%)

58Hz

Page 20

21 18 2.94 1.79 0.61 476 2.81 1.72 0.61 500 2.70 1.65 0.61 524 2.60 1.59 0.61 547 21 20 3.06 1.50 0.49 500 2.94 1.44 0.49 530 2.85 1.40 0.49 541 2.75 1.35 0.49 565 22 18 2.94 1.91 0.65 476 2.81 1.83 0.65 500 2.70 1.76 0.65 524 2.60 1.69 0.65 547 22 20 3.06 1.62 0.53 500 2.94 1.56 0.53 530 2.85 1.51 0.53 541 2.75 1.46 0.53 565 22 22 3.19 1.31 0.41 518 3.08 1.26 0.41 550 3.00 1.23 0.41 565 2.88 1.18 0.41 589 23 18 2.94 2.03 0.69 476 2.81 1.94 0.69 500 2.70 1.86 0.69 524 2.60 1.79 0.69 547 23 20 3.06 1.75 0.57 500 2.94 1.67 0.57 530 2.85 1.62 0.57 541 2.75 1.57 0.57 565 23 22 3.19 1.43 0.45 518 3.08 1.38 0.45 550 3.00 1.35 0.45 565 2.88 1.29 0.45 589 24 18 2.94 2.14 0.73 476 2.81 2.05 0.73 500 2.70 1.97 0.73 524 2.60 1.90 0.73 547 24 20 3.06 1.87 0.61 500 2.94 1.79 0.61 530 2.85 1.74 0.61 541 2.75 1.68 0.61 565 24 22 3.19 1.56 0.49 518 3.08 1.51 0.49 550 3.00 1.47 0.49 565 2.88 1.41 0.49 589 24 24 3.35 1.24 0.37 541 3.23 1.19 0.37 571 3.15 1.17 0.37 589 3.05 1.13 0.37 619 25 18 2.94 2.26 0.77 476 2.81 2.17 0.77 500 2.70 2.08 0.77 524 2.60 2.00 0.77 547 25 20 3.06 1.99 0.65 500 2.94 1.91 0.65 530 2.85 1.85 0.65 541 2.75 1.79 0.65 565 25 22 3.19 1.69 0.53 518 3.08 1.63 0.53 550 3.00 1.59 0.53 565 2.88 1.52 0.53 589 25 24 3.35 1.37 0.41 541 3.23 1.32 0.41 571 3.15 1.29 0.41 589 3.05 1.25 0.41 619 26 18 2.94 2.38 0.81 476 2.81 2.28 0.81 500 2.70 2.19 0.81 524 2.60 2.11 0.81 547 26 20 3.06 2.11 0.69 500 2.94 2.03 0.69 530 2.85 1.97 0.69 541 2.75 1.90 0.69 565 26 22 3.19 1.82 0.57 518 3.08 1.75 0.57 550 3.00 1.71 0.57 565 2.88 1.64 0.57 589 26 24 3.35 1.51 0.45 541 3.23 1.45 0.45 571 3.15 1.42 0.45 589 3.05 1.37 0.45 619 26 26 3.45 1.14 0.33 571 3.35 1.11 0.33 601 3.30 1.09 0.33 619 3.20 1.06 0.33 637 27 18 2.94 2.50 0.85 476 2.81 2.39 0.85 500 2.70 2.30 0.85 524 2.60 2.21 0.85 547 27 20 3.06 2.24 0.73 500 2.94 2.14 0.73 530 2.85 2.08 0.73 541 2.75 2.01 0.73 565 27 22 3.19 1.94 0.61 518 3.08 1.88 0.61 550 3.00 1.83 0.61 565 2.88 1.75 0.61 589 27 24 3.35 1.64 0.49 541 3.23 1.58 0.49 571 3.15 1.54 0.49 589 3.05 1.49 0.49 619 27 26 3.45 1.28 0.37 571 3.35 1.24 0.37 601 3.30 1.22 0.37 619 3.20 1.18 0.37 637 28 18 2.94 2.61 0.89 476 2.81 2.50 0.89 500 2.70 2.40 0.89 524 2.60 2.31 0.89 547 28 20 3.06 2.36 0.77 500 2.94 2.26 0.77 530 2.85 2.19 0.77 541 2.75 2.12 0.77 565 28 22 3.19 2.07 0.65 518 3.08 2.00 0.65 550 3.00 1.95 0.65 565 2.88 1.87 0.65 589 28 24 3.35 1.78 0.53 541 3.23 1.71 0.53 571 3.15 1.67 0.53 589 3.05 1.62 0.53 619 28 26 3.45 1.41 0.41 571 3.35 1.37 0.41 601 3.30 1.35 0.41 619 3.20 1.31 0.41 637 29 18 2.94 2.73 0.93 476 2.81 2.62 0.93 500 2.70 2.51 0.93 524 2.60 2.42 0.93 547 29 20 3.06 2.48 0.81 500 2.94 2.38 0.81 530 2.85 2.31 0.81 541 2.75 2.23 0.81 565 29 22 3.19 2.20 0.69 518 3.08 2.12 0.69 550 3.00 2.07 0.69 565 2.88 1.98 0.69 589 29 24 3.35 1.91 0.57 541 3.23 1.84 0.57 571 3.15 1.80 0.57 589 3.05 1.74 0.57 619 29 26 3.45 1.55 0.45 571 3.35 1.51 0.45 601 3.30 1.49 0.45 619 3.20 1.44 0.45 637 30 18 2.94 2.85 0.97 476 2.81 2.73 0.97 500 2.70 2.62 0.97 524 2.60 2.52 0.97 547 30 20 3.06 2.60 0.85 500 2.94 2.50 0.85 530 2.85 2.42 0.85 541 2.75 2.34 0.85 565 30 22 3.19 2.33 0.73 518 3.08 2.24 0.73 550 3.00 2.19 0.73 565 2.88 2.10 0.73 589 30 24 3.35 2.04 0.61 541 3.23 1.97 0.61 571 3.15 1.92 0.61 589 3.05 1.86 0.61 619 30 26 3.45 1.69 0.49 571 3.35 1.64 0.49 601 3.30 1.62 0.49 619 3.20 1.57 0.49 637 31 18 2.94 2.97 1.01 476 2.81 2.84 1.01 500 2.70 2.73 1.01 524 2.60 2.63 1.01 547 31 20 3.06 2.73 0.89 500 2.94 2.61 0.89 530 2.85 2.54 0.89 541 2.75 2.45 0.89 565 31 22 3.19 2.45 0.77 518 3.08 2.37 0.77 550 3.00 2.31 0.77 565 2.88 2.21 0.77 589 31 24 3.35 2.18 0.65 541 3.23 2.10 0.65 571 3.15 2.05 0.65 589 3.05 1.98 0.65 619 31 26 3.45 1.83 0.53 571 3.35 1.78 0.53 601 3.30 1.75 0.53 619 3.20 1.70 0.53 637 32 18 2.94 3.08 1.05 476 2.81 2.95 1.05 500 2.70 2.84 1.05 524 2.60 2.73 1.05 547 32 20 3.06 2.85 0.93 500 2.94 2.73 0.93 530 2.85 2.65 0.93 541 2.75 2.56 0.93 565 32 22 3.19 2.58 0.81 518 3.08 2.49 0.81 550 3.00 2.43 0.81 565 2.88 2.33 0.81 589 32 24 3.35 2.31 0.69 541 3.23 2.23 0.69 571 3.15 2.17 0.69 589 3.05 2.10 0.69 619 32 26 3.45 1.97 0.57 571 3.35 1.91 0.57 601 3.30 1.88 0.57 619 3.20 1.82 0.57 637

INDOOR INDOOR

CAPACITY:2.5(kW)

INPUT:595(W)SHF:0.79

OUTDOOR DB(:)

25 27 30

WB(:)

Q SHC SHF Q SHC SHF Q SHC SHF Q SHC SHFINPUT INPUT INPUT INPUT

DB(:)

PERFORMANCE DATA COOL operation Rated frequency 57Hz

MSZ-FA25VA : MUZ-FA25VA MUZ-FA25VAH

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

Page 21

PERFORMANCE DATA COOL operation Rated frequency 57Hz

MSZ-FA25VA : MUZ-FA25VA MUZ-FA25VAH

CAPACITY:2.5(kW)

INDOOR INDOOR

DB (:) WB (:)

21 18 2.45 1.49 0.61 583 2.25 1.37 0.61 619 2.08 1.27 0.61 643 21 20 2.58 1.26 0.49 607 2.40 1.18 0.49 637 2.23 1.09 0.49 672 22 18 2.45 1.59 0.65 583 2.25 1.46 0.65 619 2.08 1.35 0.65 643 22 20 2.58 1.36 0.53 607 2.40 1.27 0.53 637 2.23 1.18 0.53 672 22 22 2.73 1.12 0.41 631 2.55 1.05 0.41 666 2.38 0.97 0.41 690 23 18 2.45 1.69 0.69 583 2.25 1.55 0.69 619 2.08 1.43 0.69 643 23 20 2.58 1.47 0.57 607 2.40 1.37 0.57 637 2.23 1.27 0.57 672 23 22 2.73 1.23 0.45 631 2.55 1.15 0.45 666 2.38 1.07 0.45 690 24 18 2.45 1.79 0.73 583 2.25 1.64 0.73 619 2.08 1.51 0.73 643 24 20 2.58 1.57 0.61 607 2.40 1.46 0.61 637 2.23 1.36 0.61 672 24 22 2.73 1.34 0.49 631 2.55 1.25 0.49 666 2.38 1.16 0.49 690 24 24 2.88 1.06 0.37 655 2.70 1.00 0.37 684 2.55 0.94 0.37 714 25 18 2.45 1.89 0.77 583 2.25 1.73 0.77 619 2.08 1.60 0.77 643 25 20 2.58 1.67 0.65 607 2.40 1.56 0.65 637 2.23 1.45 0.65 672 25 22 2.73 1.44 0.53 631 2.55 1.35 0.53 666 2.38 1.26 0.53 690 25 24 2.88 1.18 0.41 655 2.70 1.11 0.41 684 2.55 1.05 0.41 714 26 18 2.45 1.98 0.81 583 2.25 1.82 0.81 619 2.08 1.68 0.81 643 26 20 2.58 1.78 0.69 607 2.40 1.66 0.69 637 2.23 1.54 0.69 672 26 22 2.73 1.55 0.57 631 2.55 1.45 0.57 666 2.38 1.35 0.57 690 26 24 2.88 1.29 0.45 655 2.70 1.22 0.45 684 2.55 1.15 0.45 714 26 26 3.03 1.00 0.33 678 2.85 0.94 0.33 708 2.68 0.88 0.33 738 27 18 2.45 2.08 0.85 583 2.25 1.91 0.85 619 2.08 1.76 0.85 643 27 20 2.58 1.88 0.73 607 2.40 1.75 0.73 637 2.23 1.62 0.73 672 27 22 2.73 1.66 0.61 631 2.55 1.56 0.61 666 2.38 1.45 0.61 690 27 24 2.88 1.41 0.49 655 2.70 1.32 0.49 684 2.55 1.25 0.49 714 27 26 3.03 1.12 0.37 678 2.85 1.05 0.37 708 2.68 0.99 0.37 738 28 18 2.45 2.18 0.89 583 2.25 2.00 0.89 619 2.08 1.85 0.89 643 28 20 2.58 1.98 0.77 607 2.40 1.85 0.77 637 2.23 1.71 0.77 672 28 22 2.73 1.77 0.65 631 2.55 1.66 0.65 666 2.38 1.54 0.65 690 28 24 2.88 1.52 0.53 655 2.70 1.43 0.53 684 2.55 1.35 0.53 714 28 26 3.03 1.24 0.41 678 2.85 1.17 0.41 708 2.68 1.10 0.41 738 29 18 2.45 2.28 0.93 583 2.25 2.09 0.93 619 2.08 1.93 0.93 643 29 20 2.58 2.09 0.81 607 2.40 1.94 0.81 637 2.23 1.80 0.81 672 29 22 2.73 1.88 0.69 631 2.55 1.76 0.69 666 2.38 1.64 0.69 690 29 24 2.88 1.64 0.57 655 2.70 1.54 0.57 684 2.55 1.45 0.57 714 29 26 3.03 1.36 0.45 678 2.85 1.28 0.45 708 2.68 1.20 0.45 738 30 18 2.45 2.38 0.97 583 2.25 2.18 0.97 619 2.08 2.01 0.97 643 30 20 2.58 2.19 0.85 607 2.40 2.04 0.85 637 2.23 1.89 0.85 672 30 22 2.73 1.99 0.73 631 2.55 1.86 0.73 666 2.38 1.73 0.73 690 30 24 2.88 1.75 0.61 655 2.70 1.65 0.61 684 2.55 1.56 0.61 714 30 26 3.03 1.48 0.49 678 2.85 1.40 0.49 708 2.68 1.31 0.49 738 31 18 2.45 2.47 1.01 583 2.25 2.27 1.01 619 2.08 2.10 1.01 643 31 20 2.58 2.29 0.89 607 2.40 2.14 0.89 637 2.23 1.98 0.89 672 31 22 2.73 2.10 0.77 631 2.55 1.96 0.77 666 2.38 1.83 0.77 690 31 24 2.88 1.87 0.65 655 2.70 1.76 0.65 684 2.55 1.66 0.65 714 31 26 3.03 1.60 0.53 678 2.85 1.51 0.53 708 2.68 1.42 0.53 738 32 18 2.45 2.57 1.05 583 2.25 2.36 1.05 619 2.08 2.18 1.05 643 32 20 2.58 2.39 0.93 607 2.40 2.23 0.93 637 2.23 2.07 0.93 672 32 22 2.73 2.21 0.81 631 2.55 2.07 0.81 666 2.38 1.92 0.81 690 32 24 2.88 1.98 0.69 655 2.70 1.86 0.69 684 2.55 1.76 0.69 714 32 26 3.03 1.72 0.57 678 2.85 1.62 0.57 708 2.68 1.52 0.57 738

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

INPUT:595(W)SHF:0.79

OUTDOOR DB(:)

35 40 46

Page 22

21 18 4.11 2.39 0.58 748 3.94 2.28 0.58 785 3.78 2.19 0.58 823 3.64 2.11 0.58 860 21 20 4.29 1.97 0.46 785 4.11 1.89 0.46 832 3.99 1.84 0.46 851 3.85 1.77 0.46 888 22 18 4.11 2.55 0.62 748 3.94 2.44 0.62 785 3.78 2.34 0.62 823 3.64 2.26 0.62 860 22 20 4.29 2.14 0.50 785 4.11 2.06 0.50 832 3.99 2.00 0.50 851 3.85 1.93 0.50 888 22 22 4.46 1.70 0.38 813 4.31 1.64 0.38 865 4.20 1.60 0.38 888 4.03 1.53 0.38 926 23 18 4.11 2.71 0.66 748 3.94 2.60 0.66 785 3.78 2.49 0.66 823 3.64 2.40 0.66 860 23 20 4.29 2.32 0.54 785 4.11 2.22 0.54 832 3.99 2.15 0.54 851 3.85 2.08 0.54 888 23 22 4.46 1.87 0.42 813 4.31 1.81 0.42 865 4.20 1.76 0.42 888 4.03 1.69 0.42 926 24 18 4.11 2.88 0.70 748 3.94 2.76 0.70 785 3.78 2.65 0.70 823 3.64 2.55 0.70 860 24 20 4.29 2.49 0.58 785 4.11 2.39 0.58 832 3.99 2.31 0.58 851 3.85 2.23 0.58 888 24 22 4.46 2.05 0.46 813 4.31 1.98 0.46 865 4.20 1.93 0.46 888 4.03 1.85 0.46 926 24 24 4.69 1.59 0.34 851 4.52 1.54 0.34 898 4.41 1.50 0.34 926 4.27 1.45 0.34 972 25 18 4.11 3.04 0.74 748 3.94 2.91 0.74 785 3.78 2.80 0.74 823 3.64 2.69 0.74 860 25 20 4.29 2.66 0.62 785 4.11 2.55 0.62 832 3.99 2.47 0.62 851 3.85 2.39 0.62 888 25 22 4.46 2.23 0.50 813 4.31 2.15 0.50 865 4.20 2.10 0.50 888 4.03 2.01 0.50 926 25 24 4.69 1.78 0.38 851 4.52 1.72 0.38 898 4.41 1.68 0.38 926 4.27 1.62 0.38 972 26 18 4.11 3.21 0.78 748 3.94 3.07 0.78 785 3.78 2.95 0.78 823 3.64 2.84 0.78 860 26 20 4.29 2.83 0.66 785 4.11 2.71 0.66 832 3.99 2.63 0.66 851 3.85 2.54 0.66 888 26 22 4.46 2.41 0.54 813 4.31 2.32 0.54 865 4.20 2.27 0.54 888 4.03 2.17 0.54 926 26 24 4.69 1.97 0.42 851 4.52 1.90 0.42 898 4.41 1.85 0.42 926 4.27 1.79 0.42 972 26 26 4.83 1.45 0.30 898 4.69 1.41 0.30 944 4.62 1.39 0.30 972 4.48 1.34 0.30 1000 27 18 4.11 3.37 0.82 748 3.94 3.23 0.82 785 3.78 3.10 0.82 823 3.64 2.98 0.82 860 27 20 4.29 3.00 0.70 785 4.11 2.88 0.70 832 3.99 2.79 0.70 851 3.85 2.70 0.70 888 27 22 4.46 2.59 0.58 813 4.31 2.50 0.58 865 4.20 2.44 0.58 888 4.03 2.33 0.58 926 27 24 4.69 2.16 0.46 851 4.52 2.08 0.46 898 4.41 2.03 0.46 926 4.27 1.96 0.46 972 27 26 4.83 1.64 0.34 898 4.69 1.59 0.34 944 4.62 1.57 0.34 972 4.48 1.52 0.34 1000 28 18 4.11 3.54 0.86 748 3.94 3.39 0.86 785 3.78 3.25 0.86 823 3.64 3.13 0.86 860 28 20 4.29 3.17 0.74 785 4.11 3.04 0.74 832 3.99 2.95 0.74 851 3.85 2.85 0.74 888 28 22 4.46 2.77 0.62 813 4.31 2.67 0.62 865 4.20 2.60 0.62 888 4.03 2.50 0.62 926 28 24 4.69 2.35 0.50 851 4.52 2.26 0.50 898 4.41 2.21 0.50 926 4.27 2.14 0.50 972 28 26 4.83 1.84 0.38 898 4.69 1.78 0.38 944 4.62 1.76 0.38 972 4.48 1.70 0.38 1000 29 18 4.11 3.70 0.90 748 3.94 3.54 0.90 785 3.78 3.40 0.90 823 3.64 3.28 0.90 860 29 20 4.29 3.34 0.78 785 4.11 3.21 0.78 832 3.99 3.11 0.78 851 3.85 3.00 0.78 888 29 22 4.46 2.95 0.66 813 4.31 2.84 0.66 865 4.20 2.77 0.66 888 4.03 2.66 0.66 926 29 24 4.69 2.53 0.54 851 4.52 2.44 0.54 898 4.41 2.38 0.54 926 4.27 2.31 0.54 972 29 26 4.83 2.03 0.42 898 4.69 1.97 0.42 944 4.62 1.94 0.42 972 4.48 1.88 0.42 1000 30 18 4.11 3.87 0.94 748 3.94 3.70 0.94 785 3.78 3.55 0.94 823 3.64 3.42 0.94 860 30 20 4.29 3.52 0.82 785 4.11 3.37 0.82 832 3.99 3.27 0.82 851 3.85 3.16 0.82 888 30 22 4.46 3.12 0.70 813 4.31 3.01 0.70 865 4.20 2.94 0.70 888 4.03 2.82 0.70 926 30 24 4.69 2.72 0.58 851 4.52 2.62 0.58 898 4.41 2.56 0.58 926 4.27 2.48 0.58 972 30 26 4.83 2.22 0.46 898 4.69 2.16 0.46 944 4.62 2.13 0.46 972 4.48 2.06 0.46 1000 31 18 4.11 4.03 0.98 748 3.94 3.86 0.98 785 3.78 3.70 0.98 823 3.64 3.57 0.98 860 31 20 4.29 3.69 0.86 785 4.11 3.54 0.86 832 3.99 3.43 0.86 851 3.85 3.31 0.86 888 31 22 4.46 3.30 0.74 813 4.31 3.19 0.74 865 4.20 3.11 0.74 888 4.03 2.98 0.74 926 31 24 4.69 2.91 0.62 851 4.52 2.80 0.62 898 4.41 2.73 0.62 926 4.27 2.65 0.62 972 31 26 4.83 2.42 0.50 898 4.69 2.35 0.50 944 4.62 2.31 0.50 972 4.48 2.24 0.50 1000 32 18 4.11 4.19 1.02 748 3.94 4.02 1.02 785 3.78 3.86 1.02 823 3.64 3.71 1.02 860 32 20 4.29 3.86 0.90 785 4.11 3.70 0.90 832 3.99 3.59 0.90 851 3.85 3.47 0.90 888 32 22 4.46 3.48 0.78 813 4.31 3.36 0.78 865 4.20 3.28 0.78 888 4.03 3.14 0.78 926 32 24 4.69 3.10 0.66 851 4.52 2.98 0.66 898 4.41 2.91 0.66 926 4.27 2.82 0.66 972 32 26 4.83 2.61 0.54 898 4.69 2.53 0.54 944 4.62 2.49 0.54 972 4.48 2.42 0.54 1000

INDOOR INDOOR

CAPACITY:3.5(kW)

INPUT:935(W)SHF:0.76

OUTDOOR DB(:)

25 27 30

WB(:)

Q SHC SHF Q SHC SHF Q SHC SHF Q SHC SHFINPUT INPUT INPUT INPUT

DB(:)

PERFORMANCE DATA COOL operation Rated frequency 70Hz

MSZ-FA35VA : MUZ-FA35VA MUZ-FA35VAH

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

Page 23

PERFORMANCE DATA COOL operation Rated frequency 70Hz

MSZ-FA35VA : MUZ-FA35VA MUZ-FA35VAH

CAPACITY:3.5(kW)

INDOOR INDOOR

DB (:) WB (:)

21 18 3.43 1.99 0.58 916 3.15 1.83 0.58 972 2.91 1.68 0.58 1010 21 20 3.61 1.66 0.46 954 3.36 1.55 0.46 1000 3.12 1.43 0.46 1057 22 18 3.43 2.13 0.62 916 3.15 1.95 0.62 972 2.91 1.80 0.62 1010 22 20 3.61 1.80 0.50 954 3.36 1.68 0.50 1000 3.12 1.56 0.50 1057 22 22 3.82 1.45 0.38 991 3.57 1.36 0.38 1047 3.33 1.26 0.38 1085 23 18 3.43 2.26 0.66 916 3.15 2.08 0.66 972 2.91 1.92 0.66 1010 23 20 3.61 1.95 0.54 954 3.36 1.81 0.54 1000 3.12 1.68 0.54 1057 23 22 3.82 1.60 0.42 991 3.57 1.50 0.42 1047 3.33 1.40 0.42 1085 24 18 3.43 2.40 0.70 916 3.15 2.21 0.70 972 2.91 2.03 0.70 1010 24 20 3.61 2.09 0.58 954 3.36 1.95 0.58 1000 3.12 1.81 0.58 1057 24 22 3.82 1.75 0.46 991 3.57 1.64 0.46 1047 3.33 1.53 0.46 1085 24 24 4.03 1.37 0.34 1029 3.78 1.29 0.34 1075 3.57 1.21 0.34 1122 25 18 3.43 2.54 0.74 916 3.15 2.33 0.74 972 2.91 2.15 0.74 1010 25 20 3.61 2.24 0.62 954 3.36 2.08 0.62 1000 3.12 1.93 0.62 1057 25 22 3.82 1.91 0.50 991 3.57 1.79 0.50 1047 3.33 1.66 0.50 1085 25 24 4.03 1.53 0.38 1029 3.78 1.44 0.38 1075 3.57 1.36 0.38 1122 26 18 3.43 2.68 0.78 916 3.15 2.46 0.78 972 2.91 2.27 0.78 1010 26 20 3.61 2.38 0.66 954 3.36 2.22 0.66 1000 3.12 2.06 0.66 1057 26 22 3.82 2.06 0.54 991 3.57 1.93 0.54 1047 3.33 1.80 0.54 1085 26 24 4.03 1.69 0.42 1029 3.78 1.59 0.42 1075 3.57 1.50 0.42 1122 26 26 4.24 1.27 0.30 1066 3.99 1.20 0.30 1113 3.75 1.12 0.30 1159 27 18 3.43 2.81 0.82 916 3.15 2.58 0.82 972 2.91 2.38 0.82 1010 27 20 3.61 2.52 0.70 954 3.36 2.35 0.70 1000 3.12 2.18 0.70 1057 27 22 3.82 2.21 0.58 991 3.57 2.07 0.58 1047 3.33 1.93 0.58 1085 27 24 4.03 1.85 0.46 1029 3.78 1.74 0.46 1075 3.57 1.64 0.46 1122 27 26 4.24 1.44 0.34 1066 3.99 1.36 0.34 1113 3.75 1.27 0.34 1159 28 18 3.43 2.95 0.86 916 3.15 2.71 0.86 972 2.91 2.50 0.86 1010 28 20 3.61 2.67 0.74 954 3.36 2.49 0.74 1000 3.12 2.31 0.74 1057 28 22 3.82 2.37 0.62 991 3.57 2.21 0.62 1047 3.33 2.06 0.62 1085 28 24 4.03 2.01 0.50 1029 3.78 1.89 0.50 1075 3.57 1.79 0.50 1122 28 26 4.24 1.61 0.38 1066 3.99 1.52 0.38 1113 3.75 1.42 0.38 1159 29 18 3.43 3.09 0.90 916 3.15 2.84 0.90 972 2.91 2.61 0.90 1010 29 20 3.61 2.81 0.78 954 3.36 2.62 0.78 1000 3.12 2.43 0.78 1057 29 22 3.82 2.52 0.66 991 3.57 2.36 0.66 1047 3.33 2.19 0.66 1085 29 24 4.03 2.17 0.54 1029 3.78 2.04 0.54 1075 3.57 1.93 0.54 1122 29 26 4.24 1.78 0.42 1066 3.99 1.68 0.42 1113 3.75 1.57 0.42 1159 30 18 3.43 3.22 0.94 916 3.15 2.96 0.94 972 2.91 2.73 0.94 1010 30 20 3.61 2.96 0.82 954 3.36 2.76 0.82 1000 3.12 2.55 0.82 1057 30 22 3.82 2.67 0.70 991 3.57 2.50 0.70 1047 3.33 2.33 0.70 1085 30 24 4.03 2.33 0.58 1029 3.78 2.19 0.58 1075 3.57 2.07 0.58 1122 30 26 4.24 1.95 0.46 1066 3.99 1.84 0.46 1113 3.75 1.72 0.46 1159 31 18 3.43 3.36 0.98 916 3.15 3.09 0.98 972 2.91 2.85 0.98 1010 31 20 3.61 3.10 0.86 954 3.36 2.89 0.86 1000 3.12 2.68 0.86 1057 31 22 3.82 2.82 0.74 991 3.57 2.64 0.74 1047 3.33 2.46 0.74 1085 31 24 4.03 2.50 0.62 1029 3.78 2.34 0.62 1075 3.57 2.21 0.62 1122 31 26 4.24 2.12 0.50 1066 3.99 2.00 0.50 1113 3.75 1.87 0.50 1159 32 18 3.43 3.50 1.02 916 3.15 3.21 1.02 972 2.91 2.96 1.02 1010 32 20 3.61 3.24 0.90 954 3.36 3.02 0.90 1000 3.12 2.80 0.90 1057 32 22 3.82 2.98 0.78 991 3.57 2.78 0.78 1047 3.33 2.59 0.78 1085 32 24 4.03 2.66 0.66 1029 3.78 2.49 0.66 1075 3.57 2.36 0.66 1122 32 26 4.24 2.29 0.54 1066 3.99 2.15 0.54 1113 3.75 2.02 0.54 1159

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

INPUT:935(W)SHF:0.76

OUTDOOR DB(:)

35 40 46

Page 24

PERFORMANCE DATA HEAT operation

CAPACITY:3.2(kW)

INPUT:735(W)

OUTDOOR WB(:)

INDOOR

-10 -5 0 5 10 15 20

DB(:)

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 2.02 478 2.43 573 2.85 647 3.26 698 3.68 742 4.06 764 4.48 779 21 1.92 515 2.30 610 2.72 676 3.10 728 3.52 764 3.90 786 4.30 816 26 1.73 551 2.14 647 2.53 713 2.94 764 3.36 801 3.74 823 4.16 845

CAPACITY:4.0(kW)

INPUT:995(W)

OUTDOOR WB(:)

INDOOR

-10 -5 0 5 10 15 20

DB(:)

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 2.52 647 3.04 776 3.56 876 4.08 945 4.60 1005 5.08 1035 5.60 1055 21 2.40 697 2.88 826 3.40 915 3.88 985 4.40 1035 4.88 1065 5.38 1104 26 2.16 746 2.68 876 3.16 965 3.68 1035 4.20 1085 4.68 1114 5.20 1144

MSZ-FA25VA : MUZ-FA25VA MUZ-FA25VAH Rated frequency 77Hz

MSZ-FA35VA : MUZ-FA35VA MUZ-FA35VAH Rated frequency 73Hz

NOTE Q:Total capacity (kW) INPUT:Total power input (W) DB : Dry-bulb temperature WB : Wet-bulb temperature

Page 25

Discharge temperature thermistor Indoor coil temperature thermistor

Defrost thermistor

Fin temperature thermistor Ambient temperature thermistor

Purpose

Protection Cooling : Coil frost prevention Heating : High pressure protection Cooling : High pressure protection Heating : Defrosting

Protection Cooling : Low ambient temperature operation Heating : Defrosting (Heater)

Compressor

LEV

Outdoor

fan motor

Indoor

fan motor

Defrost

heater

R.V. coil

Sensor

Actuator

OFF

Outdoor fan motor

Compressor

5 seconds 15 seconds

ON OFF

Compressor

Outdoor fan motor

R.V.coil

ON OFF

<COOL>

5 seconds

<HEAT>

5 seconds

ON or OFF

ACTUATOR CONTROL

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

9-1. Outdoor fan motor control

The fan motor turns ON/OFF, interlocking with the compressor. [ON] The fan motor turns ON 5 seconds before the compressor starts up. [OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running.

9-2. R.V. coil control

Heating

Cooling

Dry

NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor.

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

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

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

ON OFF OFF

9-3. Relation between main sensor and actuator

Page 26

Jumper wire

Defrost finish temperature

none

(cut)

soldered

(Initial setting)

MUZ-FA35VA

MUZ-FA25VAH

MUZ-FA35VAH

MUZ-FA25VA

15:

13:

10:

15:

13:

10:

(Serial number :

6002551~)

(Serial number :

~6002550)

Housing point

SERVICE FUNCTIONS

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

CHANGE IN DEFROST SETTING

Changing defrost finish temperature

<JS> When the JS wire of the outdoor Inverter P.C. board is cut/ soldered, the defrost finish temperature is changed.

(Refer to 11-7.1.)

TROUBLESHOOTING

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

11-1. Cautions on troubleshooting

1. Before troubleshooting, check the following

1) Check the power supply voltage.

2) Check the indoor/outdoor connecting wire for mis-wiring.

2. Take care of the following during servicing

1) Before servicing the air conditioner, be sure to turn OFF the main unit first with the remote controller, and then after confirming the horizontal vane is closed, turn OFF the breaker and / or disconnect the power plug.

2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic control P.C. board.

3) When removing the electrical parts, be careful to the residual voltage of smoothing capacitor.

4) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components.

5) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.

Lead wiring

3. Troubleshooting procedure

1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality.

To make sure, check how many times the abnormality indication is flashing on and off before starting service work.

2) Before servicing check that the connector and terminal are connected properly.

3) If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and

the components for bursting and discoloration.

4) When troubleshooting, refer to 11-2., 11-3. and 11-4.

Page 27

11-2. Failure mode recall function

Operational procedure

Yes

(Blinks)

(OFF)

Yes

Releasing the failure mode recall function

W1. Regardless of normal or abnormal condition, a short beep is emitted once the signal is received.

Note1.Make sure to release the failure mode recall function once it's set up, otherwise the unit cannot operate properly.

2.If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.

W2. Blinking pattern when the indoor unit is abnormal:

W3.Blinking pattern when the outdoor unit is abnormal:

OFF

Beeps

Repeated cycle Repeated cycle

OFF

No beep Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5second interval

2.5-second OFF 3-second ON

Blinking at 0.5second interval

Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5second interval

No beep Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking at 0.5second interval

Repeated cycle

Beeps

Does POWER lamp on the indoor unit blink at the interval of 0.5 seconds? Blinks: Either indoor or outdoor unit is abnormal. Beep is emitted at the same timing as the blinking of POWER lamp. W2

The cause of abnormality cannot be found because the abnormality doesn't recur.

Setting up the failure mode recall function

Before blinking, does POWER lamp stay ON for 3 seconds? Stays ON for 3 seconds (without beep): The outdoor unit is abnormal.

The indoor unit is abnormal. Check the blinking pattern, and confirm the abnormal point with the indoor unit failure mode table (Refer to indoor unit service manual.). Make sure to check at least two consecutive blinking cycles. W2

Turn ON the power supply. <

Preparation of the remote controller

1 While pressing both OPERATION SELECT

button and TOO COOL button on the remote controller at the same time, press RESET button.

2 First, release RESET button.

And release the other two buttons after all LCD except the set temperature in operation display section of the remote controller is displayed after 3 seconds.

Deleting the memorized abnormal condition

1After repairing the unit, recall the failure mode again according to

"Setting up the failure mode recall function" mentioned above.

2Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed)

with the remote controller headed towards the indoor unit.

3Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted. 4Release the failure mode recall function according to "Releasing the failure mode recall function"

mentioned above.

Repair the defective parts.

Release the failure mode recall function by the following procedures. Turn OFF the power supply and turn it ON again. Press RESET button of the remote controller.

Judgment of indoor/outdoor abnormality

Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. W1

The plasma or outdoor unit might be abnormal because there are some abnormalities that can't be recalled with this way. Confirm if plasma unit or outdoor unit is abnormal according to the flow chart of the plasma unit or detailed outdoor unit failure mode recall function. (11-2.2)

The outdoor unit is abnormal. Check the blinking pattern, and confirm the abnormal point with the outdoor unit failure mode table (11-2.3.). Make sure to check at least two consecutive blinking cycles. W3

Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (11-4.) disappears, the memorized failure details can be recalled. This mode is very useful when the unit needs to be repaired for the abnormality which doesn't recur.

1. Flow chart of failure mode recall function for the indoor/outdoor unit

Page 28

2. Flow chart of the detailed outdoor unit failure mode recall function

Operational procedure

Note1. Make sure to release the failure mode recall function once it's set up, otherwise the unit cannot operate properly.

2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized. W2.Blinking pattern when outdoor unit is abnormal:

Yes

(Blinks)

(OFF)

OFF

No beep

Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking at 0.5second interval

No beep Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking at 0.5-

second interval

Repeated cycle

W1. Regardless of normal or abnormal condition, 2 short beeps are emitted as the signal is received.

Does POWER lamp on the indoor unit blink at the interval of 0.5 seconds? Blinks: The outdoor unit is abnormal. Beep is emitted at the same timing as the blinking of POWER lamp. W2

Deleting the memorized abnormal condition

1After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall function" mentioned above. 2Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit.

3Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted. 4Release the failure mode recall function according to "Releasing the failure mode recall function"

mentioned above.

Repair the defective parts.

With the remote controller headed towards the indoor unit, press TOO COOL or TOO WARM button to adjust the set temperature to 25:. W1

The outdoor unit is normal.

Releasing the failure mode recall function

Release the failure mode recall function by the following procedures. Turn OFF the power supply and turn it ON again. Press RESET button of the remote controller.

Release the failure mode recall function according to the left mentioned procedure.

Confirm that the remote controller is in the failure mode recall function.

The outdoor unit might be abnormal. Confirm if outdoor unit is abnormal according to the following procedures.

Page 29

OFF

2-time flash

2.5 seconds OFF

3-time flash

2.5 seconds OFF

4-time flash

2.5 seconds OFF

5-time flash

2.5 seconds OFF

6-time flash

2.5 seconds OFF

7-time flash

2.5 seconds OFF

8-time flash

2.5 seconds OFF

9-time flash

2.5 seconds OFF

10-time flash

2.5 seconds OFF

11-time flash

2.5 seconds OFF

12-time flash

2.5 seconds OFF

14-time flash

2.5 seconds OFF

None (Normal)

Outdoor power system

Discharge temperature thermistor

Defrost thermistor

Fin temperature thermistor

P.C. board temperature thermistor

Ambient temperature thermistor

Overcurrent

Compressor synchronous abnormality

( Compressor start-up failure

protection)

Discharge temperature

High pressure

Fin temperature/ P.C. board

temperature

Outdoor fan motor

Nonvolatile memory data

Discharge temperature

DC voltage

Each phase current of compressor

Overcurrent

Compressor open-phase

Outdoor unit

(Other abnormality)

1-time flash every

2.5 seconds

3-time flash

2.5 seconds OFF

4-time flash

2.5 seconds OFF

2-time flash

2.5 seconds OFF

11-time flash

2.5 seconds OFF

12-time flash

2.5 seconds OFF

7-time flash

2.5 seconds OFF

5-time flash

2.5 seconds OFF

8-time flash

2.5 seconds OFF

9-time flash

2.5 seconds OFF

10-time flash

2.5 seconds OFF

When it consecutively occurs 3 times that the compressor

stops for overcurrent protection within 1 minute after start-up.

When thermistor shorts or opens during compressor running.

When 14A(MUZ-FA25VA,MUZ-FA25VAH)/ 24A

(MUZ-FA35VA,MUZ-FA35VAH) current flow

into intelligent power module.

When waveform of compressor current is distorted.

When temperature of discharge temperature thermistor

exceeds 116:, compressor stops. Compressor can restart

if discharge temperature thermistor reads 100: or less

3 minutes later.

When temperature of indoor coil thermistor exceeds 70: in

HEAT mode.

When defrost thermistor exceeds 70: in COOL mode.

When temperature of fin temperature thermistor on the

inverter P.C. board exceeds 83 :(MUZ-FA25VA,

MUZ-FA25VAH)/ 82:(MUZ-FA35VA,MUZ-FA35VAH), or

temperature of P.C. board temperature thermistor on the

inverter P.C. board exceeds 85:(MUZ-FA25VA,

MUZ-FA25VAH)/ 81:(MUZ-FA35VA,MUZ-FA35VAH).

When outdoor fan has stopped 3 times in a row within

30 seconds after outdoor fan start-up.

When nonvolatile memory data cannot be read properly.

When temperature of discharge temperature thermistor has

been 50: or less for 20 minutes.

When DC voltage of inverter cannot be detected normally.

When each phase current of compressor cannot

be detected normally.

When 14A(MUZ-FA25VA,MUZ-FA25VAH)/ 24A

(MUZ-FA35VA,MUZ-FA35VAH) current flow into intelligent

power module (IPM).

When the open-phase operation of

compressor is detected. When the interphase short out

occurs in the output of the intelligent power module (IPM).

When the compressor winding shorts out.

When the inverter P.C. board is defective.

•Reconnect connectors.

•Refer to 11-6.A"How to check

inverter/ compressor".

•Check stop valve.

•Refer to 11-6.G"Check of

outdoor thermistors".

❈Defective outdoor thermistors

can be identified by checking

the blinking pattern of LED.

•Reconnect compressor connector.

•Refer to 11-6.A"How to check

inverter/ compressor".

•Check stop valve.

•Reconnect compressor connector.

•Refer to 11-6.A"How to check

inverter/ compressor".

•Check refrigerant circuit and

refrigerant amount.

•Refer to 11-6.L"Check of LEV".

•Check refrigerant circuit and

refrigerant amount.

•Check stop valve.

•Check around outdoor unit.

•Check outdoor unit air passage.

•Refer to 11-6.I"Check of

outdoor fan motor".

•Refer to 11-6.I"Check of

outdoor fan motor".

Refer to 11-6.N"Check of inverter

P.C. board".

•Replace the inverter P.C. board.

•Refer to 11-6.L"Check of LEV".

•Check refrigerant circuit and

refrigerant amount.

•Refer to 11-6.A"How to check

inverter/ compressor".

•Reconnect compressor connector.

•Refer to 11-6. A"How to check

inverter/ compressor".

•Replace the inverter P.C. board.

POWER

lamp

(Indoor unit)

Abnormal point

(Failure mode / protection)

Condition Correspondence

Indoor/outdoor

unit failure mode

recall function

Outdoor unit

failure mode

recall function

LED indication

(Outdoor P.C. board)

3. Outdoor unit failure mode table NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-4.).

Page 30

Start

Indoor unit operates. Outdoor unit doesn't operate.

Indoor unit doesn't receive the signal from remote controller.

OPERATION INDICATOR lamp on the indoor unit is flashing on and off.

Outdoor unit operates only in Test Run operation. (Refer to 8-3.)

Outdoor unit doesn't operate even in Test Run operation. (Refer to 8-3.)

Indoor unit operates, when EMERGENCY OPERATION switch is pressed.

Indoor unit doesn't operate, when EMERGENCY OPERATION switch is pressed.

Check room temperature thermistor. Refer to "Test point diagram and voltage".

Refer to 11-6.A "How to check inverter/ compressor".

Refer to "Check of remote controller and receiver P.C. board".

1. Check indoor / outdoor connecting wire. (Check if the power is supplied to the indoor unit.)

2. Refer to "Check of indoor electronic control P.C. board and indoor fan motor".

Unit doesn't operate normal operation in COOL or HEAT mode.

Refer to 11-6.H "Check of R.V. coil".

POWER lamp Flash on and off at

0.5-second intervals Cause: Indoor/ Outdoor unit

• Mis-wiring or trouble of serial signal.

POWER

lamp 2-time flash Cause: Indoor unit

• Trouble of room temp erature/ indoor coil thermistor

POWER

lamp 3-time flash Cause: Indoor unit

• Trouble of indoor fan motor

POWER

lamp 5-time flash Cause: Outdoor unit

• Outdoor power system abnormality

POWER

lamp 6-time flash Cause: Outdoor unit

• Trouble of thermistor in outdoor unit

POWER

lamp 7-time flash Cause: Outdoor unit

• Trouble of outdoor control system

Refer to 11-6.O "How to check of mis-wiring and serial signal error ".

All lamps Flash on and off at 0.5-second intervals Cause: Indoor unit

• The horizontal vane is not installed correctly.

Refer to "Check of installation of the horizontal vane".

Check room temperature thermistor and indoor coil thermistor. Refer to "Test point diagram and voltage".

Refer to "Check of indoor fan motor".

Refer to 11-6.A "How to check inverter/ compressor".

Refer to 11-6.G "Check of outdoor thermistors".

Replace inverter P.C. board.

POWER

lamp 14-time flash Cause: Outdoor unit

• Other abnormality

Check 11-2.2. "Flow chart of the detailed outdoor unit failure mode recall function."

Left lamp of AREA

lamp 4-time flash Cause: Indoor unit

• Trouble of indoor unit control system

Replace the indoor electronic control P.C. board.

Refer to indoor unit service manual.

Indoor unit operates. Outdoor unit doesn't operate normally.

PLASMA/WASH lamp 2-time flash cause: Indoor unit

• Trouble of PLASMA DEODORIZNG power control or PLASMA AIR PURIFYING power control

Refer to "Check of PLASMA DEODORIZNG

power" or "Check of PLASMA AIR PURIFYING power".

If blinking of OPERATION INDICATOR lamp cannot be checked, it can be checked with failure mode recall function.

11-3. Instruction of troubleshooting

Page 31

Abnormal point/ Condition

When it consecutively occurs 3 times that the compressor stops for overcurrent protection within 1minute after start-up.

When discharge temperature thermistor, fin temperature thermistor, defrost thermistor, P.C. board temperature thermistor or ambient temperature thermistor shorts or opens during compressor running.

When nonvolatile memory data cannot be read properly. (When POWER lamp of the indoor unit lights up or flashes 7-time.)

When 14A(MUZ-FA25VA,MUZ-FA25VAH)/ 24A(MUZ-FA35VA, MUZ-FA35VAH) current flows into intelligent power module.

When temperature of discharge temperature thermistor exceeds 116:, compressor stops. Compressor can restart if discharge temperature thermistor reads 100: or less 3 minutes later.

When temperature of fin temperature thermistor .on the heat sink exceeds 83:(MUZ-FA25VA,MUZ-FA25VAH)/ 82: (MUZ-FA35VA,MUZ-FA35VAH) or temperature of P.C. board temperature thermistor on the inverter P.C.board exceeds 85:(MUZ-FA25VA,MUZ-FA25VAH)/ 81:(MUZ-FA35VA, MUZ-FA35VAH).

When indoor coil thermistor exceeds 70: in HEAT mode. When the defrost thermistor exceeds 70: in COOL mode.

When current from power outlet exceeds 6.1A(MUZ-FA25VA, MUZ-FA25VAH)/ 9.2A(MUZ-FA35VA,MUZ-FA35VAH), compressor frequency lowers.

When temperature of indoor coil thermistor exceeds 55: in HEAT mode, compressor frequency lowers.

When indoor coil thermistor reads 8: or less in COOL mode, compressor frequency lowers.

When temperature of discharge temperature thermistor exceeds 111:,compressor frequency lowers.

When temperature of discharge temperature thermistor has been 50: or less for 20 minutes.

No.

Symptom

LED indication

Condition

Correspondence

Outdoor unit does not operate

'Outdoor unit stops and restarts 3 minutes later' is repeated

Outdoor unit operates

1-time flash every

2.5 seconds

2-time flash

2.5 seconds OFF

3-time flash

2.5 seconds OFF

4-time flash

2.5 seconds OFF

5-time flash

2.5 seconds OFF

1-time flash

2.5 seconds OFF

3-time flash

2.5 seconds OFF

4-time flash

2.5 seconds OFF

7-time flash

2.5 seconds OFF

Outdoor power system

Outdoor thermistors

Outdoor control system

Overcurrent protection

Discharge temperature overheat protection

Fin temperature /P.C. board temperature thermistor overheat protection

High pressure protection

Frequency drop by current protection

Frequency drop by high pressure protection

Frequency drop by defrosting in COOL mode

Frequency drop by discharge temperature protection

Low discharge temperature protection

· Check stop valve.

Reconnect connector of compressor.

· Refer to 11-6.A "How to check inverter/ compressor".

· Refer to 11-6.G "Check of outdoor thermistors".

Reconnect connector of compressor.

· Refer to 11-6.A "How to check

inverter/compressor".

· Check stop valve.

Replace inverter P.C. board.

· Check refrigerant circuit and

refrigerant amount.

· Refer to 11-6.L "Check of LEV".

· Check around outdoor unit.

· Check outdoor unit air passage.

· Refer to 11-6.I "Check of outdoor

fan motor".

· Check refrigerant circuit and refrigerant amount.

· Check stop valve.

The unit is normal, but check the following.

· Check if indoor filters are clogged.

· Check if refrigerant is short.

· Check if indoor/outdoor unit air

circulation is short cycled.

· Refer to 11-6.L "Check of LEV".

· Check refrigerant circuit and

refrigerant amount.

Inverter P.C. board (Parts side)

LED

Flashing

Refer to 11-6.O "How to check miswiring and serial signal error".

When the communication fails between the indoor and outdoor unit for 3 minutes.

Serial signal

8-time flash

2.5 seconds OFF

Compressor synchronous abnormality

When the waveform of compressor current is distorted.

Reconnect connector of compressor.

· Refer to 11-6.A "How to check

inverter/compressor".

8-time flash

2.5 seconds OFF

PAM protection PAM:

Pulse Amplitude Modulation

When the overcurrent flows into IGBT(Insulated Gate Bipolar transistor : TR821) or when the bus-bar voltage reaches 320V or more, PAM stops and restarts.

This is not malfunction. PAM protection will be activated in the following cases; 1Instantaneous power voltage drop (Short time power failure) 2When the power supply voltage is high.

9-time flash

2.5 seconds OFF

Inverter check mode

When the connector of compressor is disconnected, inverter check mode starts.

Check if the connector of the compressor is correctly connected. Refer to 11-6.A "How to check inverter/ compressor".

10-time flash

2.5 seconds OFF

Outdoor fan motor

6-time flash

2.5 seconds OFF

When outdoor fan has stopped 3 times in a row within 30 seconds after outdoor fan start-up.

· Refer to 11-6.I "Check of outdoor fan motor".

· Refer to 11-6.N "Check of inverter P.C. board".

12-time flash

2.5 seconds OFF

Each phase current of compressor

When each phase current of compressor cannot be detected normally

· Refer to 11-6.A "How to check inverter/compressor".

13-time flash

2.5 seconds OFF

DC voltage

When DC voltage of inverter cannot be detected normally.

· Refer to 11-6.A "How to check inverter/compressor".

· Check refrigerant circuit and refrigerant amount.

· Refer to 11-6.L "Check of LEV".

· Refer to 11-6.G "Check of

outdoor thermistors".

Refer to 11-2.2. Flow chart of the detailed outdoor unit failure mode recall function.

When outdoor unit is defective.

Outdoor unit (Other abnormality)

14-time flash

2.5 seconds OFF

11-4. Troubleshooting check table

NOTE 1. The location of LED is illustrated at the right figure. Refer to 11-7.1.

2. LED is lighted during normal operation.

The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF. (Example) When the flashing frequency is “2”.

ON OFF

2.5-second OFF

0.5-second ON

2.5-second OFF

0.5-second ON

Page 32

11-5. Trouble criterion of main parts

Part name FigureCheck method and criterion

Outdoor fan motor(MF)

R.V. coil(21S4)

LEV(Expansion valve coil)

Measure the resistance between the terminals with a tester. (Part temperature –20˚C ~ 40˚C)

WHT – BLK

BLK – RED

RED – WHT

Normal

Measure the resistance between the terminals with a tester. (Part temperature –20˚C ~ 40˚C)

Normal

1.20 k" ~ 1.55 k"

WHT – RED RED – ORN

YLW – BRN

BRN – BLU

Normal

38 " ~ 50 "

Measure the resistance with a tester. (Part temperature : –20˚C ~ 40˚C)

Color of the lead wire

31 " ~ 41 " 31 " ~ 41 " 31 " ~ 41 "

Measure the resistance between the terminals with a tester. (Part temperature –20˚C ~ 40˚C)

Compressor(MC)

Defrost heater(H)

Measure the resistance with a tester. (Part temperature –20˚C ~ 40˚C)

Normal

333 " ~ 428 "

U-V

U-W

V-W

Normal

MUZ-FA35VA

MUZ-FA35VAH

0.41 " ~ 0.53 "

MUZ-FA25VA

MUZ-FA25VAH

1.28 " ~ 1.66 "

WHT

RED BLK

WHT

RED BLK

Measure the resistance with a tester.

Refer to 11-7. "Test point diagram and voltage", 1. "Inverter P.C. board", the chart of thermistor.

Discharge temperature thermistor (RT62)

Measure the resistance with a tester. Before measurement, hold the thermistor with your hands to warm it up.

Defrost thermistor (RT61)

Fin temperature thermistor (RT64)

Ambient temperature thermistor (RT65)

LEV

WHT

RED1

ORN4

YLW5

BRN2

BLU3

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

Page 33

●With the connector between the compressor and the intelligent power module disconnected, activate the inverter and check if the inverter is normal by measuring the balance of voltage between the terminals.

<< Operation method>> Start cooling or heating operation by pressing EMERGENCY OPERATION

switch on the indoor unit. (Test run operation : refer to 8-3.)

<<Measurement point>>

at 3 points BLK (U)-WHT (V) BLK (U)-RED (W) WHT(V)-RED (W)

NOTE 1. Output voltage varies according to power supply voltage.

2. Measure the voltage by analog type tester.

3. During this check, LED of inverter P.C. board flashes 9 times.

●Measure the resistance between the terminals on the intelligent

power module. <<Measurement point>> at 6 points BLK-WHT, WHT-BLK BLK-RED, RED-BLK WHT-RED, RED-WHT

<<Judgement>> Infinite ["]···········Normal 0~dozens of ······Abnormal (short)

Output voltage 115V

w Measure AC voltage between the lead wires at 3 points.

ohmmeter indication

Normal (infinite)

Abnormal (0~dozens of ")

LED

Inverter P.C. board (Parts side)

9-time flash

2.5-second OFF

Flashing

11-6. Troubleshooting flow

When POWER lamp flashes 5-time. Outdoor unit does not operate.

How to check inverter/ compressor

Disconnect the connector (CN61) between compressor and the intelligent power module (IPM).

Check the voltage between terminals.

Are the voltages

balanced?

Yes

Check the compressor.

Check of open phase

See 11-6.B “Check of open phase” .

Check the resistance of the intelligent power module.

See 11-6.D “Check of compressor” .

See 11-6.C “Check of intelligent power module”.

Is the resistance infinite?

No (0~several

Yes

Replace the inverter P.C. board.

Replace the inverter P.C. board and compressor.

Check of intelligent power module

Page 34

Check of compressor

Refer to 11-6.E "Check of compressor winding". Is the compressor normal?

Yes

Refer to 11-6.F "Check of compressor operation time".

Does the compressor operate continuously?

Yes

Check of compressor winding

● Disconnect the connector (CN61) between the compressor and intelligent power module, and measure the resistance between the compressor terminals.

<<Measurement point>>

at 3 points BLK-WHT BLK-RED WHT-RED

<<Judgement>>

Refer to 11-5.. 0["] ···············Abnormal [short] Infinite["] ·······Abnormal [open] NOTE 1. Be sure to zero the ohmmeter before measurement.

2. Winding resistance for each phase at 20:. Refer to 3.SPECIFICATION.

w Measure the resistance between the lead wires at 3 points.

Replace the compressor.

Is the compressor operation time more than 10 seconds?

Yes

Check the refrigerant circuit.

Replace the compressor.

Check of compressor operation time

●Connect the compressor and activate the inverter. Then measure the time until the inverter stops due to over current.

<<Operation method>>

Start heating or cooling operation by pressing EMERGENCY OPERATION switch on the indoor unit. (Test run operation : Refer to 8-3.)

<<Measurement>> Measure the time from the start of outdoor fan running to the stop of

compressor due to over current.

<<Judgement>>

For reference 0~10 seconds·····················Abnormal (compressor short or poor contact) (compressor lock-out) 10 seconds~5 minutes·······Abnormal (refrigerant circuit defect) more than 5 minutes···········Normal

0 second

10 seconds

5 minutes

Outdoor fan starts Abnormal (Compressor winding short or layer short) (Compressor connector poor contact) (Compressor lock-out)

Abnormal (Refrigerant circuit defect, etc.)

Normal

Page 35

When POWER lamp flashes 6-time.

Measure the resistance between CN641 1 and 2.

Measure the resistance between CN642 1 and 2.

Yes

Replace the thermistor except RT64. In case that RT64 is abnormal, replace the inverter P.C. board, since RT64 is combined with the inverter P.C. board.

Replace the inverter

P.C. board.

Disconnect the connectors CN641, CN642 and CN643 from the inverter P.C. board.

(Check the characteristics of each thermistor.)

Defrost thermistor RT61

Measure the resistance between CN641 3 and 4.

Reconnect the connectors CN641, CN642 and CN643. Turn ON the power supply and press EMERGENCY OPERATION switch.

Discharge temperature thermistor RT62

Fin temperature thermistor RT64

Does the resistance of the thermistor have the characteristics (11-7.1.)?

Yes

Does the unit operate 10 minutes or more?

OK. (Cause is poor contact.)

Measure the resistance between CN643 1 and 2.

Ambient temperature thermistor RT65

Disconnect connector (CN61) between the compressor and intelligent power module. Turn ON the power supply and press EMERGENCY OPERATION switch twice (HEAT mode).

Is there 230V AC between CN7211 and 2 on the power P.C.board 3 minutes after the power supply is turned ON?

Yes

Replace the power P.C. board.

Replace the 4-way valve.

Disconnect connector (CN61) between the compressor and the intelligent power module. Turn ON the power supply and press EMERGENCY OPERATION switch once (COOL mode).

Is there 230V AC between CN7211 and 2 on the power P.C. board 3 minutes after the power supply is turned ON?

Yes

Replace the power P.C. board.

w First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 11-5. w In case CN721 is not connected or R.V. coil is open, voltage is generated between the

terminal pins of the connector although any signal is not being transmitted to R.V. coil. Check if CN721 is connected.

CN721

Power P.C. board (Soldered side)

The thermistors in the outdoor unit are abnormal.

Check of outdoor thermistors

Check of R.V. coil

Unit operates COOL mode even if it is set to HEAT mode.

Unit operates HEAT mode even if it is set to COOL mode.

Page 36

Outdoor fan motor does not operate.

Does the voltage between each terminal repeat 5V and 0V DC by turns?

Does the outdoor fan rotate smoothly?

Check the inverter P.C. board. (Refer to 11-6. M)

Yes

( Fixed to either 5V or 0V DC)

Yes

Rotate the outdoor fan slowly by hand, and measure the voltage of CN931 (Measurement of feedback output). Between 1(+) and 5(-) Between 2(+) and 5(-) Between 3(+) and 5(-)

Is the resistance between each terminal of outdoor fan motor normal? (Refer to 11-5.)

Disconnect CN932 from the inverter P.C. board.

Replace the outdoor fan motor.

CN931

CN932

Inverter P.C. board (Solder side)

Turn ON the power supply.

Disconnect the connector (CN61) between compressor and intelligent power module. Turn ON power supply and press EMERGENCY OPERATION switch.

Check the electric parts in main circuit.

If light up, ok. If flash, refer to 11-4.

Is there voltage 280V ~ 370V DC between DB61 (+) and DB61 (–) on the inverter P.C. board? Refer to 11-7.1.

Dose LED on the inverter P.C. board light up or flash? Refer to 11-7.1.

Yes

Replace the indoor

electronic control P.C. board.

Yes

Replace the inverter P.C. board.

DB61

280V~370V DC

Inverter P.C. board (Solder side)

Is there voltage 230V AC

between the indoor terminal block S1and S2?

Rectify indoor/ outdoor connecting wire.

Does POWER lamp on the indoor unit light up?

Check of outdoor fan motor

Inverter does not operate.

Check of power supply

Page 37

Outdoor unit does not operate at all, or stops immediately due to overcurrent.

● Check other electric parts in the main circuit together in the case that the current-limiting resistor is defective.

Turn ON the power supply and press EMERGENCY OPERATION switch.

Replace the inverter P.C. board or the compressor.

Replace the power P.C. board or the inverter P.C. board.

Does the rush current limiting relay(X64) work properly? (Normally it closes 1 second after outdoor unit power ON.)

Yes

Is the resistance of current-limiting resistor (R64A or R64B) on the power P.C. board normal? (Normal resistance : 5' i5%)

Replace the power P.C.board.

Replace the power P.C. board.

Does LED on the inverter P.C. board light up?

Replace the LEV.

Expansion valve operates in full-opening direction.

Is LEV properly fixed to the expansion valve?

Do you hear the expansion valve "click, click·······"? Do you feel the expansion valve vibrate on touching it ?

Does the resistance of LEV have the characteristics? Refer to 11-5.

Measure each voltage between connector pins of CN724 on the inverter P.C. board.

1.Pin3(-) Pin1(+)

2.Pin4(-) Pin1(+)

3.Pin5(-) Pin1(+)

4.Pin6(-) Pin1(+) Is there about 3~5V AC between each? NOTE: Measure the voltage by an analog tester.

Yes

Replace the expansion valve.

Yes

Properly fix the LEV to the expansion valve.

Replace the inverter P.C. board.

NOTE : After check of LEV, do the undermentioned operations.

1. Turn OFF the power supply and turn ON it again.

2. Press RESET button on the remote controller.

W1. Regardless of normal or abnormal condition, a short beep is emitted once the signal is received.

Turn ON the power supply. <

Preparation of the remote controller

> 1 While pressing both OPERATION SELECT button and TOO COOL button on the remote

controller at the same time, press RESET button. 2 First, release RESET button. And release the other two buttons after all LCD

except the set temperature in operation display

section of the remote controller is displayed after

3 seconds.

Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. W1

Check of current-limiting resistor

When the current-limiting resistor is open, the rush current limiting relay (X64) may not work properly.

Heating/Cooling does not work sufficiently.

Check of LEV (Expansion valve)

Page 38

Replace the inverter P.C. board.

Is there 230V AC between CN722 1 and 3 on the power P.C. board? Refer to 11-7.2.

Yes

No problem of the power P.C. board.

Is the voltage between CN726 2(+)-3(-) on the power P.C. board 0V DC? Refer to 11-7.2.

Yes

Replace the power P.C. board.

NOTE: In case both thermistors are more than the above temperature, cool them with cold water etc...

In HEAT mode, for more than 5 minutes, let the ambient temperature thermistor continue to read 5: or less, and let the defrost thermistor continue to read -1: or less.

3 2 1

230V AC

Check the following points before checking electric continuity.

1) Does the resistance of ambient temperature thermistor have the characteristics? Refer to 11-7.1.

2) Is the resistance of defrost heater normal? Refer to 11-5.

3) Does the heater protector remain conducted (not open)?

4) Are both ambient temperature thermistor and circuit of defrost heater securely connected to connectors?

26H

CN726

CN722

Outdoor base gets frozen.

Outdoor fan motor does not operate, or stops immediately after starting up.

Yes (10-time flash)

Check the LED indication on the inverter P.C. board. Does the LED flash 10-time?

Replace the inverter P.C. board.

CN931

CN932

Inverter P.C.board (Solder side)

Check the corresponding parts following LED indication. (Refer to 11-4.)

Operate the outdoor unit by starting EMERGENCY OPERATION.

Check the connection of the connectors (CN931, CN932) of outdoor fan motor. If the connection is poor, make it correct.

Check the outdoor fan motor. Refer to11-6.I.

Check of defrost heater

Check of inverter P.C. board

MUZ-FA25VA (Serial No : ~5002650T)

<MUZ-FA25VAH MUZ-FA35VAH>

MUZ-FA25VAH(Serial No : ~5000400T) MUZ-FA35VA (Serial No : ~5003000T) MUZ-FA35VAH(Serial No : ~5000400T)

Page 39

Check of inverter P.C. board

Outdoor fan motor does not operate, or stops immediately after starting up.

Yes (10-time flash)

Yes

Check the LED indication on the inverter P.C. board. Does the LED flash 10-time?

Is the fuse (F901) blown on the inverter P.C. board?

Replace the inverter P.C. board.

CN931

CN932

Inverter P.C.board (Solder side)

Check the corresponding parts following LED indication. (Refer to 11-4.)

Operate the outdoor unit by starting EMERGENCY OPERATION.

Check the connection of the connectors. (CN931, CN932) of outdoor fan motor. If the connection is poor, make it correct.

Check the outdoor fan motor. Refer to11-6.I.

MUZ-FA25VA (Serial No : 5002651T~) MUZ-FA25VAH(Serial No : 5000401T~) MUZ-FA35VA (Serial No : 5003001T~) MUZ-FA35VAH(Serial No : 5000401T~)

Page 40

• When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch.

Is there rated voltage of in the power supply?

Is there any mis-wiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire?

W1. Mis-wiring may damage indoor electronic control P.C. board during the operation. Be sure to confirm the wiring is correct before the operation starts. W3.Be sure to check this within 3 minutes after turning ON. After 3 minutes, LED blinks 6 times. Even when the inverter P.C.board is normal, LED blinks 6 times after 3 minutes.

(Lighted or not lighted)

Yes

W2 Be careful to the residual voltage of smoothing capacitor.

Be sure to release the failure-mode recall function after checking.

Yes

Refer to indoor unit service manual.

Inverter P.C.board (Parts side)

LED

Blinking

Turn OFF the power supply.

Turn ON the power supply.

Is there rated voltage between outdoor terminal block S1 and S2?

Does POWER lamp light up? <Confirmation of the power to the indoor unit>

Press EMERGENCY OPERATION switch once.

Check the power supply.

Turn OFF the power supply. Check once more if the indoor/outdoor connecting wire is not mis-wiring.

Short-circuit outdoor terminal block S2 and S3. W1

Turn ON the power supply.

Check the wiring.

Correct them .

Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S2 and S3. Turn ON the power supply. Is there amplitude of 10 to 20V DC between outdoor terminal block S2 and S3? <Confirmation of serial signal>

Is there rated voltage between indoor terminal block S1 and S2? <Confirmation of power voltage>

Replace the indoor electronic control P.C. board.

Replace the inverter P.C. board. W2

Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block?

Replace the indoor/outdoor connecting wire.

Is serial signal error indicated 6 minutes later?

Yes

· Turn OFF inverter-controlled lighting equipment.

· Turn OFF the power supply and then turn ON again.

· Press EMERGENCY OPERATION switch.

· Reinstall either the unit or the light each other away.

· Attach a filter on remote control receiving section of the indoor unit.

Is serial signal error indicated 6 minutes later?

Does the LED on the inverter P.C. board repeat "3.6-second-OFF and 0.8-second-ON quick blinking"?

Indoor unit does not operate.

• When POWER lamp flashes ON and OFF in every 0.5-second. Outdoor unit doesn’t operate.

How to check mis-wiring and serial signal error (when outdoor unit does not work)

Page 41

Electromagnetic noise enters into TV sets or radios

Is the unit earthed?

Yes

Is the distance between the antennas and the indoor unit within 3m, or is the distance between the antennas and the outdoor unit within 3m?

Is the distance between the TV sets or radios and the indoor unit within 1m, or is the distance between the TV sets or radios and the outdoor unit within 3m?

Are the antennas damaged? Is the coaxial cable damaged? Is there any poor contact in the antenna wiring?

Is the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas close?

Yes

Earth the unit.

Extend the distance between the antennas and the indoor unit, and/or the antennas and the outdoor unit.

Extend the distance between the TV sets and/or radios and the indoor unit, or the TV sets or radios and the outdoor unit.

Replace or repair the antenna. Replace or repair the coaxial cable.

Extend the distance between the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas.

Even if all of the above conditions are fulfilled, the electromagnetic noise may enter, depending on the electric field strength or the installation condition (combination of specific conditions such as antennas or wiring). Check the followings before asking for service.

1.Devices affected by the electromagnetic noise TV sets, radios (FM/AM broadcast, shortwave)

2.Channel, frequency, broadcast station affected by the electromagnetic noise

3.Channel, frequency, broadcast station unaffected by the electromagnetic noise

4.Layout of ; indoor/outdoor unit of the air conditioner, indoor/outdoor wiring, grounding wire, antennas, wiring from antennas, receiver

5.Electric field intensity of the broadcast station affected by the electromagnetic noise

6.Presence or absence of amplifier such as booster

7.Operation condition of air conditioner when the electromagnetic noise enters in

1)Turn OFF the power supply once, and then turn ON the power supply. In this situation, check for the electromagnetic noise.

2)Within 3 minutes after turning ON the power supply, press OPERATE/STOP (ON/OFF) button on the remote controller for power ON, and check for the electromagnetic noise.

3)After a short time (3 minutes later after turning ON), the outdoor unit starts running. During operation, check for the electromagnetic noise.

4)Press OPERATE/STOP (ON/OFF) button on the remote controller for power OFF, when the outdoor unit stops but the indoor/outdoor communication still runs on. In this situation, check for the electromagnetic noise.

Page 42

-20 -10 0 10 20 30 40

100

Temperature(:)

Ambient temperature thermistor(RT65)

Defrost thermistor(RT61)

Temperature(:)

Discharge temperature thermistor(RT62)

0 102030405060708090100110120

100

200

300

400

500

600

700

0 1020304050607080

100

120

140

160

180

200

Temperature(:)

Fin temperature thermistor(RT64)

Resistance(k")

11-7. Test point diagram and voltage

MUZ-FA25VA (Serial No : ~5002650T) MUZ-FA35VA (Serial No : ~5003000T) MUZ-FA25VAH (Serial No : ~5000400T) MUZ-FA35VAH (Serial No : ~5000400T)

1. Inverter P.C. board

Back side of unit

Output to drive compressor (LDV,LDW,LDU)

Smoothing capacitor (C63C)

FUSE(F801) 250V 3.15A

Smoothing capacitor (C63B)

Smoothing capacitor (C63A)

Rotational frequency

feedback signal of outdoor fan motor

(CN931)

DB61 280V ~ 370V DC

(+)

(-)

Jumper wire for change in defrost setting (JS)

Front side of unit

Connecting wire with power P.C. board (CN725)

230V AC DB61

LEV connector (CN724)

Defrost thermistor/RT61

(CN641)

Discharge temperature

thermistor/RT62

(CN641)

Ambient temperature

thermistor /RT65

(CN643)

Fin temperature

thermistor/RT64

(CN642)

Output to drive outdoor fan motor (CN932)

1(+) 2(+) 3(+)

45V 5GND

LED monitor lamp

door communication

(CN601)

Connector for indoor/out-

Page 43

11-7. Test point diagram and voltage

MUZ-FA25VA (Serial No : 5002651T~) MUZ-FA35VA (Serial No : 5003001T~) MUZ-FA25VAH (Serial No : 5000401T~) MUZ-FA35VAH (Serial No : 5000401T~)

1. Inverter P.C. board

Back side of unit

DB61 280V ~ 370V DC

(+)

(-)

Output to drive compressor (LDW, LDV, LDU)

230V AC DB61

Smoothing capacitor (C63C)

Smoothing capacitor (C63B)

Smoothing capacitor (C63A)

FUSE(F801) 250V 3.15A

FUSE(F901) 250V 3.15A

LED monitor lamp

feedback signal of outdoor fan motor

(CN931)

1(+) 2(+) 3(+) 45V 5GND

Rotational frequency

Jumper wire for change in defrost setting (JS)

Front side of unit

Fin temperature thermistor(RT64)

200 180 160 140 120 100

80 60

Resistance(k")

40 20

0 1020304050607080

Temperature(:)

Connecting wire with power P.C. board (CN725)

Defrost thermistor(RT61) Ambient temperature thermistor(RT65)

100

90 80 70 60 50 40 30

Resistance(k")

20 10

-20 -10 0 10 20 30 40

LEV connector (CN724)

Temperature(:)

(CN641)

Defrost thermistor/RT61

(CN641)

Discharge temperature

thermistor/RT62

Ambient temperature

thermistor /RT65

(CN643)

700

600

500

400

300

200

Resistance(k")

100

thermistor/RT64

(CN642)

Discharge temperature thermistor(RT62)

0 102030405060708090100110120

Fin temperature

Output to drive outdoor fan motor (CN932)

Connector for indoor/ outdoor communication (CN601)

Temperature(:)

Page 44

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

2. Power P.C. board

Back side of unit

Connecting wire with inverter P.C.board (CN726) Refer to 11-6.M

FUSE(F71) 250V 3.15A

Varistor (NR63)

230V AC

Heater connector (CN722) Refer to 11-6.M

}

MUZ-FA25VAH MUZ-FA35VAH

Varistor (NR62)

Varistor

Front side of unit

(NR64)

230V AC

R.V. coil (CN721) 230V AC

Page 45

DISASSEMBLY INSTRUCTIONS

<"Terminal with locking mechanism" Detaching points>

The terminal which has the locking mechanism can be detached as shown below. There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching.

(1) Slide the sleeve and check if there is a locking lever or not.

Sleeve

1Slide the sleeve. 2Pull the terminal while

Locking lever

pushing the locking lever.

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

OPERATING PROCEDURE

1. Removing the cabinet

(1) Remove the screw fixing the service panel. (See Photo 2.) (2) Pull down the service panel and remove it. (See Photo 2.) (3)

Disconnect the power supply and indoor/outdoor connecting wire. (4) Remove the screws fixing the top panel. (See Photo 1.) (5) Remove the top panel. (See Photo 1.) (6) Remove the screws fixing the cabinet. (See Photo 1, 2.) (7) Remove the cabinet. (8) Remove the screws fixing the back panel. (9) Remove the back panel. (See Photo 1.)

(2) The terminal with this connector has the locking mechanism.

1Hold the sleeve, and pull out the terminal slowly.

Connector

PHOTOS

Photo 1

Screws of the top panel

Screws of the cabinet

Screws of the top panel

Photo 2

Screws of the cabinet

Screw of the

service panel

Direction to remove

Hooks

Screws of the cabinet

Back panel

Service

panel

Page 46

OPERATING PROCEDURE

PHOTOS

2. Removing the inverter assembly, inverter P.C. board and power P.C. board

(1) Remove the top panel, cabinet and service panel.

(Refer to 1.)

(2) Disconnect the power supply and indoor/outdoor

connecting wire and remove the back panel. (Refer to 1.)

(3) Disconnect the ground wires(See Photo 3.), the lead wire

to the reactor and the following connectors; <Power P.C. board> CN721 (4-way valve) CN722 (Defrost heater) MUZ-FA25/FA35VAH <Inverter P.C. board> CN931,CN932 (Fan motor) CN641 (Defrost thermistor and discharge temperature

thermistor) CN643 (Ambient temperature thermistor) CN724 (LEV)

(4) Remove the compressor connector (CN61). (5) Remove the screws fixing the relay panel. (See Photo 3.) (6) Remove the inverter assembly. (See Photo 4.) (7) Disconnect all connectors and lead wires on the inverter

P.C. board. (See Photo 4.)

(8) Remove the inverter P.C. board from the inverter assembly. (9) Remove the screw fixing the power P.C. board. (See Photo

4.)

(10)

Disconnect all connectors and lead wires on the power P.C.

board.

(11)

Remove the power P.C. board from the inverter assembly.

Photo 3

Photo 4

Heat sink

Screws of the relay panel

(Inverter assembly)

Inverter P.C. board

Screws of the ground wires

Power P.C. board

3. Removing R.V. coil

(1) Remove the top panel, cabinet and service panel.

(Refer to 1.)

(2) Disconnect the power supply and indoor/outdoor

connecting wire and remove the back panel. (Refer to 1.)

(3) Remove the inverter assembly. (Refer to 2.) (4) Remove the R.V. coil. (See Photo 5.)

4. Removing the discharge temperature thermistor and defrost thermistor

(1) Remove the top panel, cabinet and service panel.

(Refer to 1.)

(2) Disconnect the power supply and indoor/outdoor connecting

wire and remove the back panel. (Refer to 1.) (3) Remove the inverter assembly. (Refer to 2.) (4) Pull out the discharge temperature thermistor from its

holder. (See Photo 5.) (5) Pull out the defrost thermistor from its holder. (See Photo 6.)

Photo 5

Screw of the power P.C. board

R.V. coil

Discharge temperature thermistor

Page 47

OPERATING PROCEDURE

PHOTOS

5. Removing outdoor fan motor

(1) Remove the top panel, cabinet and service panel.

(Refer to 1.)

(2) Disconnect the power supply and indoor/outdoor

connecting wire and remove the back panel. (Refer to 1.) (3) Disconnect the connectors for outdoor fan motor. (4) Remove the propeller nut. (5) Remove the propeller. (See Photo 7.) (6) Remove the screws fixing the fan motor. (See Photo 7.) (7) Remove the fan motor.

6. Removing the compressor and 4-way valve

(1) Remove the top panel, cabinet and service panel.

(Refer to 1.)

(2) Disconnect the power supply and indoor/outdoor

connecting wire and remove the back panel. (Refer to 1.) (3) Remove the inverter assembly. (Refer to 2.) (4) Recover gas from the refrigerant circuit.

NOTE: Recover gas from the pipes until the pressure gauge

shows 0 kg/cm

(5) Detach the welded part of the suction and the discharge

pipe connected with compressor. (6) Remove the nuts of compressor legs. (7) Remove the compressor. (8) Detach the welded part of pipes connected with 4-way

valve. (See Photo 8.)

(0 MPa).

Photo 6

Photo 7

Defrost thermistor

Screws of the outdoor fan motor

Propeller

Photo 8

Welded parts of 4-way valve

Page 48

PARTS LIST (non-RoHS compliant)

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

13-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS

16 15 14

11 12

Page 49

PARTS LIST (non-RoHS compliant)

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

13-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS

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

Part No.

No.

E02 927 232

E02 927 521

E02 927 501

E02 927 290

E02 928 290 E02 927 900

E02 929 900 E02 065 506

E02 927 661

E02 927 662

E02 927 245

E02 927 233

E02 927 640

E02 838 640 E02 927 493

E02 927 961

E02 928 079

E02 930 079 E02 928 525

E02 930 525 E02 928 523

E02 930 523 E02 838 523

E02 929 523 E02 927 293 E02 928 293

E02 929 293 E02 930 293 E02 927 515

E02 929 515 E02 927 297

E02 927 630

E02 929 630 E02 927 301

E02 840 526

E02 840 381

E02 927 937

E02 735 936

Part Name

CABINET GRILLE PROPELLER BASE BASE COMPRESSOR COMPRESSOR COMPRESSOR RUBBER SET STOP VALVE (GAS) STOP VALVE (LIQUID) SERVICE PANEL BACK PANEL EXPANSION VALVE EXPANSION VALVE EXPANSION VALVE COIL 4-WAY VALVE THERMO HOLDER THERMO HOLDER CONDENSER WIRE NET CONDENSER WIRE NET CONDENSER NET CONDENSER NET CONDENSER NET CONDENSER NET SEPARATOR SEPARATOR SEPARATOR SEPARATOR MOTOR SUPPORT MOTOR SUPPORT TOP PANEL OUTDOOR HEAT EXCHANGER OUTDOOR HEAT EXCHANGER OUTDOOR FAN MOTOR DEFROST HEATER HEATER PROTECTOR CAPILLARY TUBE CAPILLARY TUBE

Symbol

in Wiring

Diagram

MC MC

LEV

26H

MUZ-

FA25VA-

1 1 1 1

3 1 1 1 1 1

1 1

Q'ty/unit

MUZ-

FA25VAH-

1 1 1

1 1

3 1 1 1 1 1

1 1 1

1 1

1 1 1 1

MUZ-

FA35VA-

1 1 1 1

1 3 1 1 1 1

1 1 1

1 1

MUZ-

FA35VAH-

1 1 1

1 3 1 1 1 1

1 1 1

1 1

1 1 1 1

Remarks

KNB073FDVH KNB092FCAH 3RUBBERS/SET

{9.52 {6.35

RC0J50-

{3.0✕{2.0✕240 {3.0✕{1.8✕600

Page 50

REACTOR POWER P.C. BOARD POWER P.C. BOARD R.V. COIL THERMISTOR SET AMBIENT TEMPERATURE THERMISTOR FUSE HOLDER FUSE TERMINAL BLOCK TERMINAL BLOCK INVERTER P.C. BOARD INVERTER P.C. BOARD INVERTER P.C. BOARD INVERTER P.C. BOARD FUSE VARISTOR VARISTOR

E02 838 337 E02 927 444 E02 931 444 E02 927 490 E02 927 306 E02 927 308 E02 735 241 E02 735 382 E02 573 375 E02 927 374 E02 B42 451 E02 B43 451 E02 929 451 E02 930 451 E02 127 382 E02 661 385 E02 927 385

1 2 3

4 5 6 7 8 9

11 12 13

Symbol

in Wiring

Diagram

Q'ty/unit

DEFROST, DISCHARGE

T20AL250V 3P 3P Including heat sink and RT64 Including heat sink and RT64 Including heat sink and RT64 Including heat sink and RT64 T3.15AL250V

Remarks

Part No.

No.

Part Name

L61

21S4

RT61,RT62

RT65

F61 TB1 TB2

F71,F801,F901

NR62,NR63,NR64

1 1

1 1 1 1 1 1 1 1

1 1 1

1 1 1 1 1 1 1 1

1 1 1

1 1

1 1 1 1 1 1 1

1 1 1

1 1 1 1 1 1 1 1

1 1 1 1

MUZ-

FA25VA-

MUZ-

FA25VAH-

MUZ-

FA35VA-

MUZ-

FA35VAH-

PARTS LIST (non-RoHS compliant)

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

13-2. OUTDOOR UNIT ELECTRICAL PARTS

Part numbers that are circled are not shown in the illustration.

Page 51

Symbol

in Wiring

Diagram

Q'ty/unit

MUZ-FA25VA-

Remarks

Parts No. Parts Name

MUZ-FA35VA-

E02 838 704

DRAIN SOCKET

No.

Symbol

in Wiring

Diagram

Remarks

Parts No. Parts Name

E02 927 113 E02 927 115 E02 927 112

2 3 4

BRUSH NOZZLE UNIVERSAL ADAPTER

No.

Q'ty/unit

1 1 1

MUZ-

FA25VA-

MUZ-

FA25VAH-

MUZ-

FA35VA-

MUZ-

FA35VAH-

PARTS LIST (non-RoHS compliant)

MUZ-FA25VA MUZ-FA35VA 13-3. DRAIN SOCKET

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

13-4. QUICK CLEAN KIT

●You can clean the surface of the heat exchanger and line flow fan if you attach QUICK CLEAN KIT to your vacuum cleaner.

Page 52

RoHS PARTS LIST (RoHS compliant)

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

14-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS

16 15 14

11 12

Page 53

RoHS PARTS LIST (RoHS compliant)

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

14-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS

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

No.

1 2 3

5 6

7 8 9

10 11 12

13 14

19 20

21 22

23 24

Part No.

RoHS

E12 927 232

E12 927 521

E12 927 501

E12 927 290

E12 928 290

E12 927 900

E12 929 900

E12 065 506

E12 927 661

E12 927 662

E12 927 245

E12 927 233

E12 927 640

E12 838 640

E12 927 493

E12 927 961

E12 928 079

E12 930 079

E12 928 525

E12 930 525

E12 928 523

E12 930 523

E12 838 523

E12 929 523

E12 927 293

E12 928 293

E12 929 293

E12 930 293

E12 927 515

E12 929 515

E12 927 297

E12 927 630

E12 929 630

E12 927 301

E12 840 526

E12 840 381

E12 927 937

E12 735 936

Part Name

Symbol

in Wiring

Diagram

MC MC

LEV

26H

MUZ-

FA25VA-

1 1 1 1

3 1 1 1 1 1

1 1

Q'ty/unit

MUZ-

FA25VAH-

1 1 1

1 1

3 1 1 1 1 1

1 1 1

1 1

1 1 1 1

MUZ-

FA35VA-

1 1 1 1

1 3 1 1 1 1

1 1 1

1 1

MUZ-

FA35VAH-

1 1 1

1 3 1 1 1 1

1 1 1

1 1

1 1 1 1

Remarks

KNB073FDVH KNB092FCAH 3RUBBERS/SET

{9.52 {6.35

RC0J50-

{3.0✕{2.0✕240 {3.0✕{1.8✕600

Page 54

E12 838 337 E12 927 444 E12 931 444 E12 927 490 E12 927 306 E12 927 308 E12 735 241 E12 735 382 E12 573 375 E12 927 374 E12 B42 451 E12 B43 451 E12 929 451 E12 930 451 E12 127 382 E12 661 385 E12 927 385

1 2 3

4 5 6 7 8 9

11 12 13

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

Symbol

in Wiring

Diagram

Q'ty/unit

DEFROST, DISCHARGE

T20AL250V 3P 3P Including heat sink and RT64 Including heat sink and RT64 Including heat sink and RT64 Including heat sink and RT64 T3.15AL250V

Remarks

Part No.

No.

Part Name

L61

21S4

RT61,RT62

RT65

F61 TB1 TB2

F71,F801,F901 NR62,NR63,NR64

1 1

1 1 1 1 1 1 1 1

1 1 1

1 1 1 1 1 1 1 1

1 1 1

1 1

1 1 1 1 1 1 1

1 1 1

1 1 1 1 1 1 1 1

1 1 1 1

MUZ-

FA25VA-

MUZ-

FA25VAH-

MUZ-

FA35VA-

MUZ-

FA35VAH-

RoHS

RoHS PARTS LIST (RoHS compliant)

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

14-2. OUTDOOR UNIT ELECTRICAL PARTS

Part numbers that are circled are not shown in the illustration.

Page 55

Symbol

in Wiring

Diagram

Q'ty/unit

MUZ-FA25VA-

Remarks

Parts No. Parts Name

MUZ-FA35VA-

E12 838 704

DRAIN SOCKET

No.

RoHS

Symbol

in Wiring

Diagram

Remarks

Parts No. Parts Name

E12 927 113 E12 927 115 E12 927 112

2 3 4

G G G

BRUSH NOZZLE UNIVERSAL ADAPTER

No.

Q'ty/unit

1 1 1

MUZ-

FA25VA-

MUZ-

FA25VAH-

MUZ-

FA35VA-

MUZ-

FA35VAH-

RoHS

RoHS PARTS LIST (RoHS compliant)

MUZ-FA25VA MUZ-FA35VA 14-3. DRAIN SOCKET

MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH

14-4. QUICK CLEAN KIT

●You can clean the surface of the heat exchanger and line flow fan if you attach QUICK CLEAN KIT to your vacuum cleaner.

Page 56

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

Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in May 2007. No. OB372 REVISED EDITION-D 6 Distributed in Feb. 2007. No. OB372 REVISED EDITION-C 6 Distributed in May 2006. No. OB372 REVISED EDITION-B 6 Distributed in Jan. 2006. No. OB372 REVISED EDITION-A 6 Distributed in Jan. 2005. No. OB372 6 Made in Japan

New publication, effective May 2007 Specifications subject to change without notice.

Mitsubishi MUZ-FA25VA-E1, MUZ-FA35VA-E1, MUZ-FA25VAH-E1, MUZ-FA35VAH-E1 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual