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

Revision D:

•PARTS LIST and RoHS PARTS LIST have been

changed.

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Please void OB372 REVISED EDITION-C

OUTDOOR UNIT

SERVICE MANUAL

HFC	No. OB372
utilized	REVISED EDITION-D
R410A

Wireless type

Models

MUZ-FA25VA - E1

MUZ-FA35VA - E1

MUZ-FA25VAH - E1

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. ACTUATOR 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

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.

	Model	Serial number	6. Wiring diagram	11-6.N Check of inverter P.C.board
	MUZ-FA25VA - E1	5002651T~
	MUZ-FA25VAH - E1	5000401T~	Change	Change
	MUZ-FA35VA - E1	5003001T~
	MUZ-FA35VAH - E1	5000401T~

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 TECHNICAL CHANGES

MUZ-A09YV - E1		MUZ-FA25VA - E1
MUZ-A09YVH - E1		MUZ-FA25VAH - E1

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 - E1		MUZ-FA35VA - E1
MUZ-A12YVH - E1		MUZ-FA35VAH - E1

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.

1As 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.

2Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during storage and installation, since it is more susceptible to contaminations than R22.

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

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

Refrigerant

Refrigeration

oil

	New refrigerant	Previous refrigerant
Refrigerant	R410A	R22
Composition (Ratio)	HFC-32: HFC-125 (50%:50%)	R22 (100%)
Refrigerant handling	Pseudo-azeotropic refrigerant	Single refrigerant
Chlorine	Not included	Included
Safety group (ASHRAE)	A1/A1	A1
Molecular weight	72.6	86.5
Boiling point (:)	-51.4	-40.8
Steam pressure [25:](Mpa)	1.557	0.94
Saturated steam density [25:](Kg/K)	64	44.4
Combustibility	Non combustible	Non combustible
ODP w1	0	0.055
GWP w2	1730	1700
Refrigerant charge method	From liquid phase in cylinder	Gas phase
Additional charge on leakage	Possible	Possible
Kind	Incompatible oil	Compatible oil
Color	Non	Light yellow
Smell	Non	Non

w1 :Ozone Depletion Potential	: based on CFC-11
w2 :Global Warming Potential	: based on CO2

4

New Specification

Current Specification

The incompatible refrigeration oil easily separates from

Since refrigerant and refrigeration oil are compatible,

refrigerant and is in the upper layer inside the suction muffler.

refrigeration oil goes back to the compressor through the

Raising position of the oil back hole enables to back the

lower position oil back hole.

Compressor

refrigeration oil of the upper layer to flow back to the

Compressor

Compressor

Oil back hole

compressor.

Suction muffler

Suction muffler

refrigeration oil

Oil back hole

Refrigerant

refrigeration oil /Refrigerant

NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system). The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/f [Gauge])

Conversion chart of refrigerant temperature and pressure

(MPa [Gauge])
	4.0
	3.5
pressure							R410A
	3.0						R22
liquid	2.5
	2.0
	1.5
Saturated
	1.0
	0.5
	0.0
	-0.5
	-30 -20			-10 0 10 20 30 40 50 60

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

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

	R410A tools	Can R22 tools be used?	Description
			R410A has high pressures beyond the measurement range of existing
	Gauge manifold	No	gauges. Port diameters have been changed to prevent any other refrigerant
			from being charged into the unit.
	Charge hose	No	Hose material and cap size have been changed to improve the pressure
			resistance.
	Gas leak detector	No	Dedicated for HFC refrigerant.
	Torque wrench	Yes	6.35 mm and 9.52 mm
		No	12.7 mm
	Flare tool	Yes	Clamp bar hole has been enlarged to reinforce the spring strength in the tool.
	Flare gauge	New	Provided for flaring work (to be used with R22 flare tool).
	Vacuum pump	New	Provided to prevent the back flow of oil. This adapter enables you to use
	adapter		vacuum pumps.
	Electronic scale for	New	It is difficult to measure R410A with a charging cylinder because the
	refrigerant charging		refrigerant bubbles due to high pressure and high-speed vaporization

No : Not Substitutable for R410A Yes : Substitutable for R410A

5

2.Refrigerant piping

1Specifications

Use the refrigerant pipes that meet the following specifications.

	Pipe	Outside diameter	Wall	Insulation material
		mm	thickness
	For liquid	6.35	0.8 mm	Heat resisting foam plastic
	For gas	9.52	0.8 mm
				Specific gravity 0.045 Thickness 8 mm

12.70.8 mm

•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.

2Flaring 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”.

Pipe diameter	Dimension of flare nut
mm	R410A		R22
6.35	17		17
9.52	22		22
12.7	26		24

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.

Indoor unit

Refrigerant gas cylinder operating valve

Union

	Stop valve
Liquid pipe
Gas pipe	Outdoor unit

Service port

Gauge manifold valve (for R410A)

Charge hose (for R410A)

Refrigerant gas cylinder for R410A with siphon

Refrigerant (liquid)

Electronic scale for refrigerant charging

6

2 PART NAMES AND FUNCTIONS

MUZ-FA25VA MUZ-FA35VA

MUZ-FA25VAH MUZ-FA35VAH

ACCESSORIES

Air inlet
(back and side)
Piping			MUZ-FA25VA MUZ-FA25VAH
Drain hose
			MUZ-FA35VA	MUZ-FA35VAH
Air outlet	1	Drain socket	1
	2	Quick clean kit	1	1

Drain outlet

3 SPECIFICATION

Outdoor model

Function

Power supply

Capacity		Air flow 1	K /h
		Capacity Rated frequency(Min.-Max.)	kW
		Dehumidification	r/h
		Power outlet	A
data		Running current 1	A
		Power input 1	W
Electrical		Power factor 1	%
		Starting current (Total) 1	A
		Compressor motor current 1	A
		Fan motor current 1	A
Coefficient of performance(C.O.P) 1
Compressor		resistance(at 20:)
		Model
		Output	W
		Winding	"
Fan	motor	Model
		Winding	"
		resistance(at 20:)
		Dimensions WOHOD	mm
		Weight	kg
		Sound level 1	dB(A)
Special	remarks	Fan speed(High/Low, High/Med./Low)	rpm
		Fan speed regulator
		Refrigerant filling	kg
		capacity(R410A)
		Refrigeration oil (Model)	cc

MUZ-FA25VA			MUZ-FA35VA
MUZ-FA25VAH			MUZ-FA35VAH
Cooling		Heating	Cooling		Heating
Single phase			Single phase
230V,50Hz			230V,50Hz
2.5(0.9-3.2)		3.2(0.9-5.0)	3.5(1.0-4.1)		4.0(0.9-6.0)
1.4		—	2.0		—
2,058		1,938		2,004
	10			10
2.75		3.25	4.05		4.35
562		702	902		962
89		94	97		96
	3.5			4.6
2.44		2.97	3.72		4.02
0.31		0.28	0.33		0.33
4.20		4.35	3.74		4.02
KNB073FDVH			KNB092FCAH
	550			650
U-V 1.53		U-W 1.53	U-V 0.49		U-W 0.49
V-W 1.53			V-W 0.49
RC0J50-AL			RC0J50-AL
WHT-BLK 37.5			WHT-BLK 37.5
BLK-RED 37.5			BLK-RED 37.5
RED-WHT 37.5			RED-WHT 37.5
800o550o285			800o550o285
	33			37
	46		47	48
810/750		880/810/650	840/760		880/800/630
2		3	2		3
	0.90			1.05
320 (NEO22)			320 (NEO22)

NOTE : Test conditions are based on ISO 5151

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

7

Specifications and rating conditions of main electric parts

Item	Model
Current transformer	(CT)
Current transformer	(CT761, CT781)

Smoothing capacitor (C63A, C63B, C63C)

Diode module	(DB61, DB65)
Fuse		(F61)
Fuse	(F71, F801,F901w)
Defrost heater		(H)
Intelligent power module		(IPM)
Expansion valve coil		(LEV)
Reactor		(L61)
Current-detecting resistor		(R61)
Current-detecting resistor		(R831)

Current-limiting resistor (R64A, R64B)

Terminal block	(TB1,TB2)
Relay	(X63)
Relay	(X64)
Relay	(X66)
R.V. coil	(21S4)
Heater protector	(26H)

MUZ-FA25VA

MUZ-FA25VAH

MUZ-FA35VA

MUZ-FA35VAH

ETA19Z59BZ

ETQ19Z71AY

620+ 420V D25XB60 250V 20A 250V 3.15A

— 230V 130W — 230V 130W PS21244-A-203

CAD-MD12ME 12VDC 10A 23.0mH

	45m" 5W (1 element)			50m" 5W (2 elements)
		25m" 5W
		5.1" 5W
		3P
		G5NB-1a
		G4A-1A-PS
—		G5NB-1a		—		G5NB-1a
		STF-01AJ503
—		Open 45:		—		Open 45:

w Refer to Page 3.

8

4 NOISE CRITERIA CURVES

MUZ-FA25VA

MUZ-FA25VAH

FAN SPEED	FUNCTION	SPL(dB(A))	LINE
High	COOLING	46
Med.	HEATING	46

Test conditions

		Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)
	90	Heating : Dry-bulb temperature				7: Wet-bulb temperature				6:
BAR
MICRO	80
0.0002	70									NC-70
dB re	60
LEVEL,
										NC-60
	50
PRESSURE
										NC-50
	40
										NC-40
SOUND
	30
BAND										NC-30
	20	APPROXIMATE
OCTAVE
		THRESHOLD OF
		HEARING FOR								NC-20
		CONTINUOUS
	10	NOISE
		63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

MUZ-FA35VA

MUZ-FA35VAH

FAN SPEED	FUNCTION	SPL(dB(A))	LINE
High	COOLING	47
Med.	HEATING	48

Test conditions

		Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)
	90	Heating : Dry-bulb temperature				7: Wet-bulb temperature				6:
BAR
MICRO	80
0.0002	70									NC-70
dB re	60
LEVEL,
										NC-60
	50
PRESSURE
										NC-50
	40
										NC-40
SOUND
	30
BAND										NC-30
	20	APPROXIMATE
OCTAVE
		THRESHOLD OF
		HEARING FOR								NC-20
		CONTINUOUS
	10	NOISE
		63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

OUTDOORUNIT

1m

MICROPHONE

9

5 OUTLINES AND DIMENSIONS

MUZ-FA25VA MUZ-FA35VA

MUZ-FA25VAH MUZ-FA35VAH

Unit: mm

344.5

285

Air

44 in

REQUIRED SPACE

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

Drain hole [42 (MUZ-FA25/FA35VA)

Drain hole [33 (MUZ-FA25/FA35VAH)

400 Air in

Bolt pitch for installation 304~325

100mm	or
	more

or	more

200mm

or	more

100mm

350mm	or
	more

2 holes 10X21	40	17.5
22.3	Air out	23

Handle

550

280	10		164.5
	150	69	99.5
		302.5

500 Bolt pitch for installation

800

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

Service panel

Liquid refrigerant pipe joint

Refrigerant pipe (flared) [6.35

-	-
35	43

Gas refrigerant pipe joint

Refrigerant pipe (flared) [9.52

170.5

Service port

10

INDOORTO UNIT CONNECTING

FA35VA-MUZ

FA25VA-MUZ

NR64

NR63

BLU

T801

IPM CT781

WHT

V

: No (Serial

: No (Serial

TB2

L61

BLK

230V~ S1

WHT

F61

WHT TAB61

L62

L63

TAB63

DB61

U

LD-U

BLK

BLK

U

S2

BLU

R64BR64A

+

+

+

P

CT761

1

TAB62

F801

V

LD-V

WHT

2

REDW MC

230V 50Hz

12-24V

S3

RED

X64

LD70

C63A C63B C63C

N

LD-W

RED

3

~5003000T)

~5002650T)

LDE

CN721

BLK

W

CN61

CT

4

3

R61

CIRCUIT BREAKER

L TB1

F71

X63

LD69

CN724

6

DSA61

TB800

IC801

1

21S4

LEV

TR821

~/N

N

GRN

2

POWER

GRN/YLW

C

6

DB65

PE

N

R831

INVERTER P.C. BOARD

2

SUPPLY

7

7

C

4

C

LDY

11

N

N

CN641

CN642

6

5

7

7

CN601

CN931 CN932

CN643

POWER P.C. BOARD

2

2

1 2 3 4 5

1 2 3 4 5

1 2 3

1 2

1 2 3 4

1 2

WHITE

GRN

1 2 3

4 5

BLU

RED

RT65

RT61 RT62

RT64

MF

SYMBOL	NAME	SYMBOL	NAME	SYMBOL	NAME
CT,CT761,CT781	CURRENT TRANSFORMER	L61	REACTOR	R61,R831	CURRENT-DETECTING RESISTOR
C63A,C63B,C63C	SMOOTHING CAPACITOR	L62,L63	CMC COIL	R64A,R64B	CURRENT-LIMITING RESISTOR
DB61,DB65	DIODE MODULE	MC	COMPRESSOR	TB1,TB2	TERMINAL BLOCK
DSA61	SURGE ABSORBER	MF	OUTDOOR FAN MOTOR	TR821	SWITCHING POWER TRANSISTOR
F61	FUSE (T20AL250V)	NR63,NR64	VARISTOR	T801	TRANSFORMER
F71,F801	FUSE (T3.15AL250V)	RT61	DEFROST THERMISTOR	X63,X64	RELAY
IC801	INTELLIGENT POWER DEVICE	RT62	DISCHARGE TEMPERATURE THERMISTOR	21S4	R.V. COIL
IPM	INTELLIGENT POWER MODULE	RT64	FIN TEMPERATURE THERMISTOR
LEV	EXPANSION VALVE COIL	RT65	AMBIENT TEMPERATURE THERMISTOR

NOTE:1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.

2.Use copper conductors only. (For field wiring) 3. Symbols below indicate.

/: Terminal block, : Connector

DIAGRAM WIRING 6

12

	INDOORTO UNIT	CONNECTING	230V~
			12-24V

CIRCUIT BREAKER

~/N

230V 50Hz

POWER

SUPPLY

TB2	WHT	F61	WHT	TAB61	L62
S1
S2	BLU
S3	RED			TAB62
				NR64	NR63
L TB1					DSA61
N			GRN
	GRN/YLW				LDE

PE

WHITE

BLU

RED

FA35VA-MUZ

FA25VA-MUZ

L63

L61

BLK

BLK

(Serial

(Serial

TAB63

BLK

R64B

R64A

DB61

+

+

+

U

LD-U

BLK

U

No

No

CT761

1

P

X64

C63A

C63B

C63C

F801

V

LD-V

WHT

2

RED

W

LD70

N

RED

3

: :

LD-W

MC

4

BLK

W

CN61

5003001T~)

5002651T~)

C

R61

CT

3

BLU

CT781

T801

IPM

WHT

V

LD69

F71

C

6

X63

TB800

N

1

21S4

IC801

7

LEV

2

TR821

F901

2

4

CN721

N

6

DB65

R831

7

IC932

2

7

INVERTER P.C. BOARD

C

4

C

LDY

N

N

7

7

CN601

CN643

CN641

CN642

CN931

POWER P.C. BOARD

2

2

6

5

1 2 3 4 5

1 2

1 2

3 4

1 2

1 2 3 4 5

1 2 3

CN932

GRN

1 2 3 4 5

MF

RT65

RT61

RT62

RT64

SYMBOL	NAME	SYMBOL	NAME	SYMBOL	NAME
CT,CT761,CT781	CURRENT TRANSFORMER	L61	REACTOR	R61,R831	CURRENT-DETECTING RESISTOR
C63A,C63B,C63C	SMOOTHING CAPACITOR	L62,L63	CMC COIL	R64A,R64B	CURRENT-LIMITING RESISTOR
DB61,DB65	DIODE MODULE	MC	COMPRESSOR	TB1,TB2	TERMINAL BLOCK
DSA61	SURGE ABSORBER	MF	OUTDOOR FAN MOTOR	TR821	SWITCHING POWER TRANSISTOR
F61	FUSE (T20AL250V)	NR63,NR64	VARISTOR	T801	TRANSFORMER
F71,F801,F901	FUSE (T3.15AL250V)	RT61	DEFROST THERMISTOR	X63,X64	RELAY
IC801	INTELLIGENT POWER DEVICE	RT62	DISCHARGE TEMPERATURE THERMISTOR	21S4	R.V. COIL
IPM,IC932	INTELLIGENT POWER MODULE	RT64	FIN TEMPERATURE THERMISTOR
LEV	EXPANSION VALVE COIL	RT65	AMBIENT TEMPERATURE THERMISTOR

NOTE:1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.

2.Use copper conductors only. (For field wiring) 3. Symbols below indicate.

/: Terminal block, : Connector

13

FA35VAH-MUZ

FA25VAH-MUZ

INDOORTO UNIT CONNECTING

L61

No (Serial

No (Serial

F61

: :

TB2

WHT

TAB61

L62

L63

TAB63

BLK

BLK

BLK

230V~ S1

WHT

LTB1

NR64

NR63

F71

X63

BLU

BLK

T801

IPM

CT781

WHT

V

DB61

U

CN724

U

~5000400T)

~5000400T)

S2

BLU

R64B R64A

+

+

+

P

CT761

LD-V

WHT

1

TAB62

F801

V

2

REDW

12-24V

S3

RED

N

LD-W

3

MC

4

3

W

CN61

CT

R61

CIRCUIT BREAKER

LD69

6

DSA61

1

TB800

IC801

~/N

N

21S4

LEV

GRN

2

TR821

230V 50Hz

GRN/YLW

CN721

LDE

POWER

N

6

C

SUPPLY

PE

POWER P.C. BOARD

7

DB65

R831

INVERTER P.C. BOARD

2

7

CN722

C

4

C

LDY

BLK

BLK

1

RED

1

X66

N

N

CN641

CN642

BLK

BLK

2

2

7

7

CN601

CN931 CN932

CN643

26H

YLW

2

2

3

6

5

1 2 3 4 5

1 2 3 4 5

1 2 3

1 2

1 2 3 4

1 2

H

BLK

BLK

BLK

1

GRN

1

2 3 4 5

2

WHITE

BLU

RT65

RT61 RT62

RT64

RED

MF

SYMBOL	NAME	SYMBOL	NAME	SYMBOL	NAME
CT,CT761,CT781	CURRENT TRANSFORMER	L61	REACTOR	R64A,R64B	CURRENT-LIMITING RESISTOR
C63A,C63B,C63C	SMOOTHING CAPACITOR	L62,L63	CMC COIL	TB1,TB2	TERMINAL BLOCK
DB61,DB65	DIODE MODULE	MC	COMPRESSOR	TR821	SWITCHING POWER TRANSISTOR
DSA61	SURGE ABSORBER	MF	OUTDOOR FAN MOTOR	T801	TRANSFORMER
F61	FUSE (T20AL250V)	NR63,NR64	VARISTOR	X63,X64,X66	RELAY
F71,F801	FUSE (T3.15AL250V)	RT61	DEFROST THERMISTOR	21S4	R.V. COIL
H	DEFROST HEATER	RT62	DISCHARGE TEMPERATURE THERMISTOR	26H	HEATER PROTECTOR
IC801	INTELLIGENT POWER DEVICE	RT64	FIN TEMPERATURE THERMISTOR
IPM	INTELLIGENT POWER MODULE	RT65	AMBIENT TEMPERATURE THERMISTOR
LEV	EXPANSION VALVE COIL	R61,R831	CURRENT-DETECTING RESISTOR

NOTE:1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.

2.Use copper conductors only. (For field wiring) 3. Symbols below indicate.

/: Terminal block, : Connector

14

INDOORTOUNIT CONNECTING	230V~ S1TB2 WHT			F61			WHT TAB61		L62 L63
		S2	BLU					TAB62
	12-24V	S3	RED
CIRCUIT BREAKER TB1								NR64	NR63
		L							DSA61
~/N		N
							GRN
230V 50Hz			GRN/YLW
								LDE
POWER
			PE					POWER P.C. BOARD
SUPPLY
								CN722
				BLK	BLK	1	RED 1		X66
			26H	BLK	BLK	2		2
							YLW
								3
			H	BLK
							BLK
				BLK		1

2

WHITE

BLU

RED

L61

TAB63 BLK

BLK

BLK

DB61

U

R64B R64A

LD-U

BLK

+

+

+

P

CT761

1

LD-V

WHT

V

2

REDW

F801

X64

LD70

C63A C63B C63C

N

RED

3

BLK

LD-W

MC

CT

4

3

R61

CN61

W

CT781

BLU

LD69

T801

IPM

WHT

F71

X63

C

6

1

TB800

N

21S4

IC801

F901

7

LEV

2

TR821

2

4

CN721

C

6

N

DB65

IC932

7

2

R831

7

C	4	C		LDY INVERTER P.C. BOARD
N		N	CN601		CN643	CN641	CN642		CN931
2		2
7		7
6		5	1 2 3 4 5		1 2	1 2 3 4	1 2	1	2	3	4	5	1	2 3	CN932
			GRN					1	2	3	4	5			MF
					RT65	RT61 RT62	RT64

	FA35VAH-MUZ
	: No (Serial
U	5000401T~)
V

5000401T~) : No (Serial FA25VAH-MUZ

SYMBOL	NAME	SYMBOL	NAME	SYMBOL	NAME
CT,CT761,CT781	CURRENT TRANSFORMER	L61	REACTOR	R64A,R64B	CURRENT-LIMITING RESISTOR
C63A,C63B,C63C	SMOOTHING CAPACITOR	L62,L63	CMC COIL	TB1,TB2	TERMINAL BLOCK
DB61,DB65	DIODE MODULE	MC	COMPRESSOR	TR821	SWITCHING POWER TRANSISTOR
DSA61	SURGE ABSORBER	MF	OUTDOOR FAN MOTOR	T801	TRANSFORMER
F61	FUSE (T20AL250V)	NR63,NR64	VARISTOR	X63,X64,X66	RELAY
F71,F801,F901	FUSE (T3.15AL250V)	RT61	DEFROST THERMISTOR	21S4	R.V. COIL
H	DEFROST HEATER	RT62	DISCHARGE TEMPERATURE THERMISTOR	26H	HEATER PROTECTOR
IC801	INTELLIGENT POWER DEVICE	RT64	FIN TEMPERATURE THERMISTOR
IPM,IC932	INTELLIGENT POWER MODULE	RT65	AMBIENT TEMPERATURE THERMISTOR
LEV	EXPANSION VALVE COIL	R61,R831	CURRENT-DETECTING RESISTOR

NOTE:1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.

2.Use copper conductors only. (For field wiring) 3. Symbols below indicate.

/: Terminal block, : Connector

7 REFRIGERANT SYSTEM DIAGRAM

MUZ-FA25VA	Unit:mm
MUZ-FA25VAH

	Refrigerant pipe [9.52	4-way valve
	(with heat insulator)
		Muffler
		Stop valve
		(with service port)	Muffler	Outdoor
	Flared connection	Discharge		heat
		temperature		exchanger
		thermistor
		RT62		Ambient
			Compressor
				temperature
			Defrost	thermistor
				RT65
			thermistor
			RT61

MUZ-FA35VA MUZ-FA35VAH

Strainer

Flared connection

LEV

#100

Capillary tube

R.V. coil

[3.0 [2.0 240

Muffler

heating ON

Stop valve

cooling OFF

Refrigerant pipe [6.35 (with strainer)

Refrigerant flow in cooling

(with heat insulator)

Refrigerant flow in heating

Unit:mm

Refrigerant pipe [9.52		4-way valve
(with heat insulator)
	Muffler
	Stop valve
	(with service port)		Muffler	Outdoor
Flared connection		Discharge
				heat
		temperature		exchanger
		thermistor
		RT62		Ambient
			Compressor
				temperature
				thermistor
				RT65
			Defrost
			thermistor
			RT61
			Capillary tube
			[3.0 [1.8 600( 2)
				Strainer
Flared connection				#100
		LEV
				R.V. coil
	Muffler
				heating ON
	Stop valve			cooling OFF
Refrigerant pipe [6.35	(with strainer)			Refrigerant flow in cooling
(with heat insulator)
				Refrigerant flow in heating

15

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

			Refrigerant piping : m		Piping size O.D : mm
Model		Max. length		Max. Height difference
		A		B	Gas	Liquid
MUZ-FA25VA
MUZ-FA25VAH		20		12	9.52	6.35
MUZ-FA35VA
MUZ-FA35VAH

Indoor unit

Max. Height difference B

Max. length A

Outdoor unit

ADDITIONAL REFRIGERANT CHARGE (R410A:g)

	Model	Outdoor unit				Refrigerant piping length (one way)
		precharged	5m	6m	7m	8m	9m	10m	11m	12m	13m	14m	15m	20m
	MUZ-FA25VA	900
	MUZ-FA25VAH
			0	0	0	90	120	150	180	210	240	270	300	450
	MUZ-FA35VA	1,050
	MUZ-FA35VAH

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

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

16

8 PERFORMANCE CURVES

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		Cooling
	(3)	Outdoor intake air dry-bulb temperature :	°C DB
	(4)	Total input:	W	}
	(5)	Indoor intake air dry-bulb temperature :	°C DB		Heating
	(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.

INDOOR UNIT

OUTDOOR UNIT

Wet and dry-bulb	Wet and dry-bulb
thermometers	thermometers

8-1. Capacity and the input curves

temperaturebulb-WetairIndoor	(degree)difference	6.6	9.7
		6.0	8.9
		5.5	8.1
		5.0	7.3
		4.5	6.6	Indoor	intake
					air
					Wet-
					bulb
		4.0	5.8		temperature (	:)

MSZ-FA25VA MUZ-FA25VA MUZ-FA25VAH frequencyRated 57Hz	MSZ-FA35VA MUZ-FA35VA MUZ-FA35VAH frequencyRated 70Hz
	Outdoor intake air Dry-bulb temperature (:)

			)
			(:
			perature
		-bulb	tem
	et
air	W
intake
Indoor

Outdoor intake air Dry-bulb temperature (:)

17