Mitsubishi MUCFH-GA35VB, MUCFH-GA50VB, MUCFH-GA60VB Service Manual

Revision A:

● RoHS PARTS LIST has been added.

FLOOR AND CEILING TYPE AIR CONDITIONERS

Please void OB381.

OUTDOOR UNIT

SERVICE MANUAL

	HFC	No. OB381
		REVISED EDITION-A
	utilized
	R410A

Wireless type

Models

MUCFH-GA35VB - E1

MUCFH-GA50VB - E1

MUCFH-GA60VB - E1

Indoor unit service manual

MCFH-GA•VB Series (OB380)

CONTENTS

1. TECHNICAL CHANGES ··············

2. PART NAMES AND FUNCTIONS··········

3. SPECIFICATION·················

4. NOISE CRITERIA CURVES ············

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

6. WIRING DIAGRAM················

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

8. PERFORMANCE CURVES ·············

9. ACTUATOR CONTROL··············

10. SERVICE FUNCTIONS···············

MUCFH-GA50VB

11. TROUBLESHOOTING ···············

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

13. PARTS LIST···················

14. RoHS PARTS LIST················

NOTE:

This service manual describes technical data of the outdoor units.

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

For servicing of RoHS compliant products, refer to the RoHS PARTS LIST (RoHS compliant).

2

Revision A :

• RoHS PARTS LIST has been added.

1 TECHNICAL CHANGES

MUH-A12YV - E1 MUCFH-GA35VB - E1

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

MUCFH-A18WV - E1 MUCFH-GA50VB - E1

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

MUCFH-A24WV - E1 MUCFH-GA60VB - E1

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

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 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 Destruction Parameter	: based on CFC-11
w2 :Global Warmth Parameter	: based on CO2

3

New Specification

Current Specification

The incompatible refrigeration oil easily separates from

Since refrigerant and refrigerating oil are compatible each,

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

R410A

pressure	3.0							R22
liquid	2.5
	2.0												NOTE : The unit of pressure has been changed to MPa on the
	1.5
Saturated
													international system of units(SI unit system).
	1.0												The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/f [Gauge])
	0.5
	0.0
	-0.5
	-30		-20 -10 0 10 20 30 40 50 60 (:)

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 and 15.88 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 4

2.Refrigerant piping

1Specifications

Use the refrigerant pipes that meet the following specifications.

	Pipe	Outside diameter	Wall	Insulation material
		mm	thickness
	6.35		0.8 mm
	For liquid			Heat resisting foam plastic
			0.8 mm
	9.52
	12.7		0.8 mm	Specific gravity 0.045 Thickness 8 mm
	For gas

15.881.0 mm

•Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm (6.35, 9.52, 12.7), 1.0 mm (15.88). Never use any pipe with a thickness less than 0.8 mm (6.35, 9.52, 12.7), 1.0 mm (15.88), 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
15.88	29		27

3.Refrigerant 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, ability 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.

Union

Stop valve

Indoor unit

Liquid pipe

Refrigerant gas cylinder operating valve

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

5

2 PART NAMES AND FUNCTIONS

MUCFH-GA35VB	MUCFH-GA50VB
Air inlet	Air inlet
(back and side)	(back and side)
Piping	Piping
Drain hose	Drain hose
Air outlet	Air outlet
Drain outlet	Drain outlet
MUCFH-GA60VB
Air inlet
(back and side)
Piping
Drain hose
Air outlet
Drain outlet

ACCESSORIES

	Item		Q'ty
		MUCFH-GA35VB	MUCFH-GA50VB	MUCFH-GA60VB
	Drain socket	1	1	1
	Drain cap [33	2	2	2
	Drain cap [16	–	1	–

6

	3				SPECIFICATION
					Outdoor model			MUCFH-GA35VB			MUCFH-GA50VB			MUCFH-GA60VB
					Function		Cooling		Heating		Cooling		Heating	Cooling	Heating
					Power supply			Single phase			Single phase			Single phase
								230V, 50Hz			230V, 50Hz			230V, 50Hz
	Capacity			Air flow(High)		K /h		3.5	1,710		2,196		5.0	6.0	2,760
				Capacity		kW			3.7		4.8				6.8
				Dehumidification		r/h		1.5	—		2.4		—	3.1	—
				Power outlet		A			10		15				25
	Electrical			Running current		A		4.85	4.23		8.01		8.38	10.51	11.71
		data		Power input		W		1,094	954		1,730		1,810	2,370	2,640
				Power factor		%			98		94				98
				Starting current		A			29		37				74
				Compressor motor current		A		4.54	3.92		7.62		7.99	9.93	11.13
				Fan motor current		A			0.31		0.39				0.58
	Coefficient of performance(C.O.P)							3.02	3.63		2.65		2.65	2.45	2.50
	Compressor			resistance(at 20:)				C-S 3.36			C-S 3.00			C-S 1.64
				Model				RN135VHSHT			RN196VHSHT			NN29VBAHT
				Output		W			900		1,300				1,900
				Winding		"		C-R 2.79			C-R 1.80			C-R 0.80
	Fan	motor		Model				RA6V33-JB			RA6V50-PA			RA6V85-DA
				Winding		"		WHT-BLK 215.1			WHT-BLK 79.5			WHT-BLK 68.8
				resistance(at 20:)				BLK-RED 306.9			BLK-RED 83.0			BLK-RED 93.1
				Dimensions WOHOD		mm		780o540o255			850o605o290			840o850o330
				Weight		kg			40		47				74
				Sound level(High)		dB			49		52				53
		remarks		Fan speed(High)		rpm			825		828				730
	Special			Fan speed regulator					1		1				1
				capacity(R410A)					1.00		1.85				2.20
				Refrigerant filling		kg
				Refrigeration oil (Model)		cc		620 (NEO22)			520 (NEO22)			1,200 (NEO22)
				Thermistor RT61(at 0:)		k"			33.18		33.18				33.18
	NOTE: Test conditions are based on ISO 5151.
				Cooling : Indoor DB27°C		WB19°C		Heating : Indoor		DB20°C WB 15.5°C
					Outdoor DB35°C WB(24°C)				Outdoor	DB 7°C WB 6°C
					Indoor-Outdoor piping length : 5m

7

4 NOISE CRITERIA CURVES

MUCFH-GA35VB

MUCFH-GA50VB

FUNCTION SPL(dB(A))

LINE

COOLING

49

HEATING

Test conditions,

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

BAND CENTER FREQUENCIES, Hz

FUNCTION SPL(dB(A))

LINE

COOLING

52

HEATING

Test conditions,

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

BAND CENTER FREQUENCIES, Hz

MUCFH-GA60VB

		FUNCTION SPL(dB(A))	LINE
		COOLING
		53
		HEATING
Test conditions,
		Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)
	90	Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
BAR
MICRO	80
0.0002redB	70		NC-70
LEVEL,	60
			NC-60
PRESSURE	50
			NC-50
	40
SOUND			NC-40
	30
BAND			NC-30
	20	APPROXIMATE
OCTAVE		THRESHOLD OF
		HEARING FOR	NC-20
		CONTINUOUS
		NOISE

10	125	250	500	1000	2000	4000	8000
63

BAND CENTER FREQUENCIES, Hz

OUTDOORUNIT

1m

MICROPHONE

8

5	OUTLINES AND DIMENSIONS
MUCFH-GA35VB							more
		Air in		REQUIRED SPACE
							or
32
		320					100mm
109			255 285 320		100m	m
						or
						m
						ore
Air in
Drainage		147 110					ore
3 holes [33		Air out		25		mor
							m
						400m
				Service panel
					Liquid refrigerant
						pipe joint
540					Refrigerant pipe
				-	(flared) [6.35
260				35
				-
			155	43
				90	Gas refrigerant
10	40	122				pipe joint
		500	74	104	Refrigerant pipe
		780			(flared) [12.7

Unit: mm

or	more

100mm

350m	m	or
			m
			ore

MUCFH-GA50VB

REQUIRED SPACE

		Drainage	355	20
			350
		hole [16.2
			Air in
		35
						1
						00
							m
								m
	90							or m
248				290	310	345		ore
		Air in

100mm or more

ormore 100mm

Drainage

3 holes [33

605 20 292

Air out	50

30

157

100

183

500
850	74

9

								re
							o
						m
					r
				o
			m
		m
	0
0
5

Service panel

Liquid refrigerant pipe joint

Refregerant pipe (flared) [6.35

-	-
30	35

Gas refregerant pipe joint

161 Refregerant pipe (flared) [12.7

350mm	or
	more

MUCFH-GA60VB			Unit: mm
			Open as a rule
			500mm or more if
		REQUIRED SPACE	the front and both
			sides are open
515
299	40		100mm or more
66
			200mm or more if
		100mm or more
51 34			there are obstacles
			to both sides
330		360
500		Open as a rule
		500mm or more if the back,	350mm or more
840		80 both sides and top are open
121

		Service panel
		Liquid refrigerant
850		pipe joint
		Refrigerant pipe
		(flared) [6.35
430		-
		30
		-
155		35
	90	Gas refrigerant
		pipe joint
	198	Refrigerant pipe
		(flared) [15.88

10

6

WIRING DIAGRAM

MUCFH-GA35VB

RT61

21S4

TB2

MF

TO

3

RED

1

CN730

CN661

CN721

INDOOR UNIT

N

BLK

2

CN711

CONNECTING

SR62

3

WHT

12V

1

BRN

BLK

CIRCUIT BREAKER

TB1

SR61

2

L

BRN

DSAR

NR61

3

RED

F61

POWER SUPPLY

N

T61

C65

BLU

~/N

TAB20

52C

230V 50Hz

PE

GRN/YLW

4

3

DEICER P.C.BOARD

WHT

C

C1

BLU

RED

MC R

S

BLK

SYMBOL

NAME

SYMBOL

NAME

SYMBOL

NAME

C1

COMPRESSOR CAPACITOR

MF

OUTDOOR FAN MOTOR

T61

TRANSFORMER

C65

OUTDOOR FAN CAPACITOR

(INNER FUSE)

TB1,TB2

TERMINAL BLOCK

DSAR

SURGE ABSORBER

NR61

VARISTOR

21S4

R.V. COIL

F61

FUSE(2A)

RT61

DEFROST THERMISTOR

52C

COMPRESSOR CONTACTOR

MC	COMPRESSOR(INNER PROTECTOR) SR61,SR62 SOLID STATE RELAY

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

MUCFH-GA50VB

MF

21S4

TB2

RT61

RED

ORN WHT BLK

TO

3

RED

CN730

1

CN661

CN721

1 2 3 4

INDOOR UNIT

N

BLK

2

CN711

CONNECTING

SR62

3

WHT

12V

TB1 BRN

1

CIRCUIT BREAKER

SR61

2

BLK

L

BRN

DSAR

RED

F61

NR61

3

POWER SUPPLY

N BLU

T61

C65

~ /N

TAB20

52C

230V

50Hz

PE

GRN/YLW

4

3

DEICER P.C.BOARD

C1

WHT

C

BLU

RED

MC R

BLK

S

SYMBOL

NAME

SYMBOL

NAME

SYMBOL

NAME

C1

COMPRESSOR CAPACITOR

MF

OUTDOOR FAN MOTOR (INNER PROTECTOR) TB1,TB2

TERMINAL BLOCK

C65	OUTDOOR FAN CAPACITOR		NR61	VARISTOR	21S4	R.V. COIL
DSAR	SURGE ABSORBER		RT61	DEFROST THERMISTOR	52C	COMPRESSOR CONTACTOR
F61	FUSE (2A)		SR61,SR62	SOLID STATE RELAY
MC	COMPRESOR (INNER PROTECTOR)		T61	TRANSFORMER
NOTES: 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

11

MUCFH-GA60VB

RT61

MF

SYMBOL

NAME

DSAR

BLKBLK

WHT

ORN

RED

BRN

C1

COMPRESSOR CAPACITOR

WHT

4

3 2

1

RED

C2

C2

OUTDOOR FAN CAPACITOR

CIRCUIT BREAKER

ORN

CN711 CN721

DSAR

SURGE ABSORBER

POWERSUPPLY

230V~/N 50Hz

TB1

CN661

1 2

3

GRN/YLW

T61

5

RT61

DEFROST THERMISTOR

L

1

F61

FUSE (3.15A)

N

X62

X52

SR61

X62

2

21S4

COM

NO

3

MC

COMPRESSOR (INNER PROTECTOR)

P E

X52

TAB52

MF

OUTDOOR FAN MOTOR (INNER PROTECTOR)

COM

NO

NR61

VARISTOR

CN730 7

DEICER

NR61

F61

3

CONNECTING

3

P.C.BOARD

WHT

1

SR61

SOLID STATE RELAY

BRN 3

4

BRN

TB1

TERMINAL BLOCK

BLU

TB2

TERMINAL BLOCK

TB2

INDOORUNIT

12V

BLU

A1

52C A2

C

T61

TRANSFORMER

BLU

21S4

R. V. COIL

N

52C

C1

RED S

MC R

X52

CONTACTOR

BLU

BLK

X62

R. V. COIL RELAY

TO

RED

52C

COMPRESSOR CONTACTOR

BLU

NOTES: 1.Use copper conductors only (For field wiring).

2.Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers (3,N).

3.Symbols below indicate.

: Terminal block,

: Connector

7 REFRIGERANT SYSTEM DIAGRAM

	MUCFH-GA35VB			Unit:mm
	Refrigerant pipe [12.7
	(with heat insulator)	4-way valve
		Stop valve	Defrost
		(with service port)		Outdoor
	Flared connection	Muffler	thermistor	heat
			RT61
				exchanger

			Capillary tube
			[3.0x[1.4x500(2pcs)
		Compressor	Capillary tube
			[3.0x[1.6x600
	Flared connection
	Strainer	Capillary tube	R.V. coil
			heating ON
	#100	[3.0x[1.6x1050
			cooling OFF
	Stop valve		Refrigerant flow in cooling
	Refrigerant pipe [6.35
		Check	Refrigerant flow in heating
	(with heat insulator)	valve

12

MUCFH-GA50VB

Refrigerant pipe [12.7	4- way valve
(with heat insulator)
Stop valve		Oil separator
(with service port)		#100	Outdoor
Flared connection		Defrost	heat
			exchanger
		thermistor
		RT61
	Capillary tube
	[2.5o[0.6o1,000
		Compressor

Flared connection

Refrigerant pipe[6.35 (with heat insulator)

Receiver

Stop valve

Capillary tube [3.0o[1.6o650

Strainer
#100	Check valve

Capillary tube [3.0o[1.6o750 (2 pcs)

R.V. coil Heating ON

Cooling OFF

Capillary tube [3.0o[1.6o500

Refrigerant flow in cooling

Refrigerant flow in heating

MUCFH-GA60VB

Refrigerant pipe [15.88		4- way valve
(with heat insulator)
	Stop valve
	(with service port)			Outdoor
Flared connection			Muffler	heat
		Muffler	#100	exchanger

	Compressor	Defrost
		thermistor
		RT61

Flared connection	Capillary tube
	[3.0X[2.0X400
Receiver
Stop valve	Strainer	Capillary tube	R.V. coil
Refrigerant pipe [6.35	#100	[3.0X[2.0X800	Heating ON
	Check valve		Cooling OFF

(with heat insulator)

Refrigerant flow in cooling

Refrigerant flow in heating

13

MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE

	Model	Refrigerant piping	Piping size O.D. : mm
		MAX. length : m
		A	Gas		Liquid
	MUCFH-GA35VB		{12.7
		25			{6.35
	MUCFH-GA50VB
	MUCFH-GA60VB		{15.88

wIt does not matter which unit is higher.

Max. Height	difference	10m
W

A: Refrigerant piping Max.length 25m

ADDITIONAL REFRIGERANT CHARGE (R410A : g)

If pipe length exceeds 7m, additional refrigerant (R410A) charge is required.

	Models	Outdoor unit:		Refrigerant piping length (one way)
		precharged	7m	10m	15m	20m	25m
	MUCFH-GA35VB	1,000
	MUCFH-GA50VB	1,850	0	60	160	260	360
	MUCFH-GA60VB	2,200

Calculation : g = 20g/m (Refrigerant piping length (m)-7)

8 PERFORMANCE CURVES

MUCFH-GA35VB MUCFH-GA50VB MUCFH-GA60VB

The standard data contained in these specifications apply only to the operation of the air conditioner under normal condition. 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

COOLING		HEATING
(1)	Indoor intake air wet-bulb temperature : ˚CWB	(1)	Indoor intake air dry-bulb temperature : ˚CDB
(2)	Indoor outlet air wet-bulb temperature : ˚CWB	(2)	Indoor outlet air dry-bulb temperature : ˚CDB
(3)	Outdoor intake air dry-bulb temperature : ˚CDB	(3)	Outdoor intake air wet-bulb temperature : ˚CWB
(4) Total input : W		(4) Total input : W

Indoor air wet/dry-bulb temperature difference on the left side of the chart on next page 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.

14

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 inlet 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 inlet.

Cover the thermometers to prevent direct rays of the sun.

3.Check that the air filter is cleaned.

4.Open windows and doors of the 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
	Air out	Wet and dry-bulb
		thermometers

Air in

FRONT VIEW

	8.7				11.1						14.7
	8.0				10.2						13.4
	7.3								9.2		12.1
	6.6								8.3		10.9
	5.9								7.5			9.7
	5.3								6.6			8.5
MCFH-GA35VB	MUCFH-GA35VB							MCFH-GA50VB	MUCFH-GA50VB		MCFH-GA60VB	MUCFH-GA60VB
18.6						23.4					31.8
17.2						21.6					29.3
15.7						19.8					26.9
14.3						18.0					24.4
12.9						16.2					22.0
11.5						14.4					19.5
10.0						12.6					17.1
	8.6					10.8					14.7
MCFH-GA35VB	MUCFH-GA35VB							MCFH-GA50VB	MUCFH-GA50VB		MCFH-GA60VB	MUCFH-GA60VB

Wet and dry-bulb thermometers

BACK VIEW

OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

COOL operation

1 Both indoor and outdoor units are under the same temperature/humidity condition.

Dry Bulb temperature (˚C)	Relative humidity (%)
20	50
25	60
30	70

15

2 Air flow should be set at MAX.

3The 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])

MUCFH-GA35VB

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

Outdoor low pressure

	13	1.3
		1.2									230V
	12
	11	1.1
	10	1.0
	9	0.9
	8	0.8
	7		0.7
					18 20				30 32 35(:)
		15					25
					50		60		70		(%)

Outdoor unit current (A)

6

230V

5

4

3				35(:)
15 18 20	25	30	32
50	60	70		(%)

Ambient temperature(˚C)	Ambient temperature(˚C)
Ambient humidity(%)	Ambient humidity(%)

MUCFH-GA50VB

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

	12	1.2
pressure	11	1.1								current(A)
	10	1.0
lowOutdoor	9	0.9								unitOutdoor
							230V
	8	0.8
	7	0.7
	6	0.6
		15 18 20			25		30 32 35(:)
		50			60		70			(%)
			Ambient temperature (:)
			Ambient humidity (%)

11
10
9
							230V
8
7
6
5
			25		30 32 35(:)
15 18 20
50			60		70		(%)

Ambient temperature (:)

Ambient humidity (%)

MUCFH-GA60VB

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

	11	1.1
pressure	10	1.0
	9	0.9
low	8	0.8
Outdoor							230V
	7	0.7
	6	0.6
	5	0.5
		15 18 20			25		30 32 35(:)
		50			60		70			(%)

Ambient temperature (:)

Ambient humidity (%)

Outdoor unit current (A)

12

11

230V

10

9

8

7

6

15 18 20	25	30	32 35(:)
50	60	70	(%)

Ambient temperature (:)

Ambient humidity (%)

16

HEAT operation

Condition Indoor : Dry bulb temerature 20.0:	Outdoor : Dry bulb temerature 7,15,20:
Wet bulb temerature 14.5:	Wet bulb temerature 6,12,14.5:

MUCFH-GA35VB

	6
(A)	230V
currentunit	5
Outdoor	4
	3

5 7 10	15	20 21	25 (:)
50	60	70	(%)

Ambient temperature(˚C)

Ambient humidity(%)

MUCFH-GA60VB

		16
	(A)	15
	current
		14
		230V
	unit	13
	Outdoor
		12
		11

5 7 10	15	20	25(:)
50	60	70	(%)
Ambient temperature (:)
Ambient humidity (%)

MUCFH-GA50VB

	(A)	11
		230V
	currentunit
		10
	Outdoor	9
		8

5 7 10	15	20	25(:)
50	60	70	(%)
Ambient temperature (:)
Ambient humidity (%)

17