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

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 -

E1

MUZ-FA25VAH MUZ-FA35VAH -

E1

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.

2

Model Serial number 6. Wiring diagram

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

Change Change

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

MUZ-FA25VA -

E1

MUZ-FA25VAH MUZ-FA35VA -

E1

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.

3

1

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

0

1730

From liquid phase in cylinder

Possible

Incompatible oil

Non Non

Previous refrigerant

R22

R22 (100%)

Single refrigerant

Included

A1

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

2

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.

4

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

No

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

30

40 50 60

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

(:)

ff

[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.

5

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

mm

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

mm

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.

6

2

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

1

Quick clean kit

2

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

1 1

1

3

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

A W %

A

W

"

kg

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

kW

r/h

K /h

✽1

mm

dB(A)

rpm

MUZ-FA25VA MUZ-FA25VAH

Cooling

Single phase

230V,50Hz

1.4

2,058

10

2.75 562

89

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

2

0.90

320 (NEO22)

Heating

3.2(0.9-5.0)

—

1,938

3.25 702

94

2.97

0.28

4.35

880/810/650

3

MUZ-FA35VA MUZ-FA35VAH

Cooling

Single phase

230V,50Hz

3.5(1.0-4.1)

2.0

4.05 902

97

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

47

840/760

2

320 (NEO22)

Heating

4.0(0.9-6.0)

—

2,004

10

4.35 962

96

4.6

4.02

0.33

4.02

650

37

48

880/800/630

3

1.05

7

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.

8

4

90

80

70

60

50

40

30

20

10

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:

90

80

70

60

50

40

30

20

10

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

1m

High Med.

NOISE CRITERIA CURVES

MUZ-FA25VA MUZ-FA25VAH

MUZ-FA35VA MUZ-FA35VAH

9

5

10

69

800

302.5 500 Bolt pitch for installation

150

22.3

Handle

550

280

164.5

99.5

170.5

23

Service panel

Service port

285

344.5

44

400

Air in

Air out

Air in

17.5

Bolt pitch for

installation

304~325

40

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

10

6

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

PE

RED

BLU

WHITE

GRN/YLW

TB1

POWER

SUPPLY

L

N

R64A

TB2

S3

S1

TO INDOOR UNIT

CONNECTING

S2

RED

BLU

WHT

R64B

WHT

+++

NR63

LDE

GRN

4

6

21

231

CN601

45

31 24

5

3

2

1

24

51 3

CN931 CN932

431212

TB800

RT65 RT64RT62RT61

POWER P.C. BOARD

CN643

CN641

INVERTER P.C. BOARD

CN642

21S4

MF

X63

CN721

1

2

IC801

F801

C63C

LD-V

LD-W

LD-U

3

1

WHT

BLK

RED RED

V

BLK

WHT

W

U

MC

CN61

IPM

CT781

CT761

2

CN724

LEV

6

R61

N

U

V

W

P

L61

BLK

R831

TAB63

3

LD69

DB65

DB61

LD70

TR821

C63B

C63A

BLK

T801

L63

NR64

DSA61

F61

CT

LDY

TAB61

L62

X64

4

F71

TAB62

GRN

BLK

BLU

CN727CN72

6

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

11

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

3

1

5

42

1

2

3

CN932

5 42

1

3

NR63

LDE

GRN

C

N

725

4

6

C

N

726

C

N

727

231

CN601

45

TB800

POWER P.C. BOARD

INVERTER P.C. BOARD

21S4

X63

CN721

1

2

IC801

F801

C63C

LD-V

LD-W

LD-U

3

1

WHT

BLK

RED

V

BLK

WHT

W

U

CN61

IPM

CT781

CT761

2

C

N

724

6

R61

N

U

V

W

P

L61

BLK

R831

TAB63

3

LD69

DB65

DB61

LD70

TR821

C63B

C63A

BLK

T801

L63

NR64

DSA61

F61

LDY

TAB61

L62

X64

4

F71

TAB62

GRN

BLK

BLU

+++

~/N

230V

~

12-24V

230V 50Hz

CIRCUIT BREAKER

PE

RED

BLU

WHITE

GRN/YLW

TB1

POWER

SUPPLY

L

N

R64A

TB2

S3

S1

TO INDOOR UNIT

CONNECTING

S2

RED

BLU

WHT

R64B

WHT

MC

LEV

MF

CT

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

12

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

U

BLK

LD-U

U

DB61

2

1

WHT

LD-V

CT761

V

P

F801

+++

W

RED RED

C63C

C63B

C63A

LD70

MC

3

LD-W

N

CN61

W

R61

BLK

V

WHT

CT781

IPM

T801

LD69

LEV

6

CN724

IC801

TB800

CN642

431212

CN641

21

CN643

3 2 1

INVERTER P.C. BOARD

5 3

24

DB65

R831

LDY

CN725

CN931 CN932

1

23145

CN601

TR821

5 31

24

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

MF

L61

BLK

TAB63

TAB61

TB2

L63

L62

WHT

F61

WHT

S1

230V~

R64A

R64B

BLU

S2

BLU

3

X64

4

CT

TAB62

NR64 NR63

RED

S3

12-24V

CONNECTING TO INDOOR UNIT

CIRCUIT BREAKER

X63

F71

TB1

L

21S4

1

2

CN721

DSA61

GRN

N

~/N

230V 50Hz

6

4

CN727CN72

6

X66

LDE

POWER P.C. BOARD

GRN/YLW

PE

POWER

SUPPLY

CN722

RED

1

2

BLKBLK

BLK BLK

312

YLW

26H

BLK

H

1

BLK

WHITE

BLU

RED

2

13

MUZ-FA25VAH (Serial No : 5000401T~)

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

DB61,DB65

DSA61

F61

F71,F801,F901

H

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~)

W

2

V

MC

3

RED RED

N

CN61

LD-W

CT781

W

R61

V

IPM

BLK

U

1

BLK

LD-U

U

P

WHT

LD-V

CT761

WHT

LEV

6

724

C

N

CN931

IC932

F901

CN932

3 2 1

5

5 3

31 24

24 1

MF

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

S1

230V~

F801

+++

TAB62

BLU

S2

C63C

C63B

C63A

LD70

X64

RED

S3

12-24V

IC801

T801

TR821

LD69

TB800

BLK

BLU

21S4

1

2

3 4

CT

CN721

X63

F71

DSA61

LDE

NR64 NR63

GRN

GRN/YLW

TB1

L

N

CONNECTING TO INDOOR UNIT

CIRCUIT BREAKER

~/N

230V 50Hz

CN642

CN641

21431212

INVERTER P.C. BOARD

CN643

R831

LDY

CN601

CN725

4

X66

CN722

RED

1

2

BLKBLK

BLK BLK

23145

6

312

YLW

26H

BLK

H

1

BLK

2

WHITE

BLU

DB65

6

CN727CN72

POWER P.C. BOARD

PE

POWER

SUPPLY

RT65 RT64RT62RT61

GRN

RED

14

7

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

15

Unit:mm

Outdoor unit

precharged

14m

270

7m

0

6m

0

5m

0

11m

180

Model

Refrigerant piping length (one way)

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

8m

90

9m

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

B

Indoor unit

Outdoor unit

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

Max. length

A

20

Max. Height difference

B

12

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)

16

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 (:)

17

Outdoor intake air Dry-bulb temperature (:)