Mitsubishi MUCF-GA35VB-E1, MUCF-GA50VB-E1, MUCF-GA60VB-E1 Service Manual

FLOOR AND CEILING TYPE AIR CONDITIONERS

HFC

utilized

R410A

OUTDOOR UNIT

SERVICE MANUAL

Wireless type Models

Revision A:

● RoHS PARTS LIST has been added. Please void OB383.

No. OB383

REVISED EDITION-A

MUCF-GA35VB MUCF-GA50VB MUCF-GA60VB -

MUCF-GA50VB

Indoor unit service manual

MCF-GA•VB Series (OB382)

CONTENTS

1. TECHNICAL CHANGES ····································2

2. PART NAMES AND FUNCTIONS······················5

3. SPECIFICATION·················································5

4. NOISE CRITERIA CURVES·······························6

5. OUTLINES AND DIMENSIONS·························7

6. WIRING DIAGRAM ············································8

7. REFRIGERANT SYSTEM DIAGRAM··············10

8. PERFORMANCE CURVES······························13

9. TROUBLESHOOTING······································22

10. DISASSEMBLY INSTRUCTIONS·····················24

11. PARTS LIST······················································31

12. RoHS PARTS LIST···········································34

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).

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

Revision A :

• RoHS PARTS LIST has been added.

MUCF-A12WV - ➔ MUCF-GA35VB -

1. Model name has been changed.

MUCF-A18WV - ➔ MUCF-GA50VB -

1. Model name has been changed.

MUCF-A24WV - ➔ MUCF-GA60VB -

1. Model name has been changed.

TECHNICAL CHANGES

E1E1

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. 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.

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 refrigerating oil are compatible each, 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

-30 -20 -10 0 10 20

40 50 60

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

(MPa [Gauge])

R410A R22

Conversion chart of refrigerant temperature and pressure

Saturated liquid pressure

(:)

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 and 15.88 mm

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

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/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.

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

15.88

17 22 26 29

Dimension of flare nut

R22

17 22 24 27

2.Refrigerant piping

Wall thickness

Outside diameter

Pipe

For liquid

For gas

6.35

9.52

12.7

15.88

0.8 mm

1.0 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 (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.

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.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.

Drain hose

Piping

Air inlet

Drain outlet

(back and side)

Air outlet

Outdoor model

Function

Power supply

Capacity Dehumidification Air flow(High) Power outlet Runnning current Power input Power factor Starting current Compressor motor current Fan motor current

Model Output Winding resistance(at 20:) Model Winding resistance(at 20:) Dimensions WOHOD Weight Sound level(High) Fan speed(High) Fan speed regulator Refrigerant filling capacity(R410A) Refrigeration oil (Model)

r/h

K /h

A W %

rpm

kg cc

MUCF-GA50VB

Cooling

Single phase

230V, 50Hz

4.8

2.4

2,196

7.98

1,744

95 37

7.59

0.39

2.65

RN196VHSHT

1,300 C-R 1.80 C-S 3.00

RA6V50-PA WHT-BLK 79.5 BLK-RED 83.0

850o605o290

44 52

825

1.45

520 (NEO22)

MUCF-GA60VB

Cooling

Single phase

230V, 50Hz

6.0

3.1

2,322

10.62 2,370

97 74

10.07

0.55

2.45

NN29VBAHT

1,900 C-R 0.80 C-S 1.64

RA6V60-MA

WHT-BLK 71

BLK-RED 89

850o605o290

60 53

873

1.85

1,200 (NEO22)

Electrical

data

Compressor

Fan

motor

Special

remarks

Coefficient of performance(C.O.P)

Capacity

MUCF-GA35VB

Cooling

Single phase

230V, 50Hz

3.5

1.5

1,914

4.89

1,104

98 29

4.58

0.31

3.02

RN135VHSHT

900 C-R 2.79 C-S 3.36

RA6V33-JC

WHT-BLK 215

BLK-RED 307 780o540o255

36 49

825

0.75

620

(NEO22)

Piping

Drain hose

Air outlet

Air inlet

Drain outlet

(back and side)

PART NAMES AND FUNCTIONS

MUCF-GA35VB

SPECIFICATION

MUCF-GA50VB MUCF-GA60VB

NOTE: Test conditions are based on ISO 5151

Cooling : Indoor DB27°C WB19°C

Outdoor DB35°C WB(24°C)

Indoor-Outdoor piping length : 5m

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

Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature 24:

SPL(dB(A)) LINE

COOLING

FUNCTION

High

FAN SPEED

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

Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature 24:

SPL(dB(A)) LINE

COOLING

FUNCTION

High

FAN SPEED

OUTDOOR UNIT

MICROPHONE

SPL(dB(A)) LINE

COOLING

FUNCTION

High

FAN SPEED

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

Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature 24:

NOISE CRITERIA CURVES

MUCF-GA35VB

MUCF-GA50VB

MUCF-GA60VB

100mm or more

r m

ore

100mm or more

350mm or more

r m

Drainage 3 holes [33

Air out

Air in

Service panel

Liquid refrigerant pipe joint

Refregerant pipe (flared) [6.35

Gas refregerant pipe joint

Refregerant pipe (flared) [12.7 (MUCF-GA50VB) [15.88 (MUCF-GA60VB)

35-

100

161

157

850

500

183

292

605

248

350

290

310

345

355

Drainage hole [16.2

320

43-

155

104

260

780

500

122

540

320

285

255

Service panel

Gas refrigerant pipe joint Refrigerant pipe (flared) [12.7

Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.35

Air out

Air in

109

110

147

Drainage 3 holes [33

100mm or more

350mm or more

REQUIRED SPACE

400m

or m

ore

OUTLINES AND DIMENSIONS

MUCF-GA35VB

Unit: mm

MUCF-GA50VB MUCF-GA60VB

Unit: mm

BRN

WHT WHT

POWER SUPPLY 230V 50Hz

~/N

TB1

CIRCUIT BREAKER

BLU

GRN/YLW

BRN

NO COM

52C

TB2

CONNECTING 12V

INDOOR UNIT

BLK

WHT

52C

WHT

ORN

RED

2 3

RED

BLK

ORN WHT

RED

DSAR

BLU

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. : Connector

: Terminal block

NOTES:

SYMBOL

C1 C2

DSAR

NAME COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR SURGE ABSORBER

SYMBOL

MC MF

TB1,TB2

NAME COMPRESOR (INNER PROTECTOR) OUTDOOR FAN MOTOR (INNER PROTECTOR) TERMINAL BLOCK

SYMBOL

52C

NAME

COMPRESSOR CONTACTOR

CIRCUIT BREAKER

POWER SUPPLY ~/N 230V 50Hz

12V

GRN/YLW

TB2

RED

WHT

BLK

WHT BLU

RED

TO INDOOR UNIT CONNECTING

WHT

BLU

BLK

RED

WHT

52C

TB1

WHT

BLK

52C

COM

DSAR

BRN

SYMBOL

TB1,TB2

52C

SYMBOL

MC MF

SYMBOL

C1 C2

DSAR

NAME

NAME NAME COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR SURGE ABSORBER

COMPRESSOR(INNER PROTECTOR)

TERMINAL BLOCK COMPRESSOR CONTACTOR

OUTDOOR FAN MOTOR (INNER FUSE)

WIRING DIAGRAM

MUCF-GA35VB

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

MUCF-GA50VB

MUCF-GA60VB

TB1

RED

~/N 230V 50Hz

POWER SUPPLY

52C

GRN/YLW

CIRCUIT BREAKER

REDRED

WHT

BLU

ORN

WHT

3 4

BLK

1 2

ORN

COM

BLU

COM

52C

BLK

12V

INDOOR UNIT CONNECTING

BLK

BRN

WHT

TB2

DSAR

WHT

BLU

BRN

WHT

BRN

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. : Connector

: Terminal block

NOTES:

SYMBOL

C1 C2

DSAR

NAME COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR SURGE ABSORBER

SYMBOL

MC MF

TB1,TB2

NAME COMPRESSOR (INNER PROTECTOR) OUTDOOR FAN MOTOR (INNER PROTECTOR) TERMINAL BLOCK

SYMBOL

52C

NAME RELAY COMPRESSOR CONTACTOR

REFRIGERANT SYSTEM DIAGRAM

MUCF-GA35VB

Flared connection

Refrigerant pipe [6.35 (with heat insulator)

Refrigerant pipe [12.7 (with heat insulator)

Flared connection

Stop valve (with service port)

Stop valve

Unit:mm

Muffler

Outdoor heat exchanger

Compressor

Strainer #100

Capillary tube [3.0x[1.4x550

Refrigerant flow in cooling

MUCF-GA50VB

Refrigerant pipe [12.7 (with heat insulator)

Flared connection

Stop valve (with service port)

Stop valve

Capillary tube

[2.5o[0.6o1,000

Oil separator

Compressor

Strainer

#100

Outdoor heat exchanger

Refrigerant pipe[6.35 (with heat insulator)

Capillary tube

[3.0o[1.6o650

Refrigerant flow in cooling

MUCF-GA60VB

Refrigerant pipe [15.88 (with heat insulator)

Stop valve (with service port)

Flared connection

Muffler

Unit:mm

Muffler

#100

Outdoor heat exchanger

Compressor

Refrigerant pipe [6.35 (with heat insulator)

Stop valve

Capillary tube [3.0X[2.0X1000

Refrigerant flow in cooling

A: Refrigerant piping Max. length 25m

Max. Height

difference *

10m

*Height difference should be within 10m regardless of which unit,

indoor or outdoor position is high.

Indoor unit

Outdoor unit

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

Model

MUCF-GA35VB MUCF-GA50VB

MUCF-GA60VB

Refrigerant piping length (one way)

Outdoor unit precharged

750 1,450 1,850

15m

160

20m

260

25m

360

10m

REFRIGERANT PIPING MAX. LENGTH & MAX. HEIGHT DIFFERENCE

Models

MUCF-GA35VB MUCF-GA50VB MUCF-GA60VB

Refrigerant piping

Max. length : m

Piping size O.D. : mm

Gas

{12.7

{15.88

Liquid

{6.35

ADDITIONAL REFRIGERANT CHARGE (R410A : g)

Calculation : Xg=20g/m ✕ (Refrigerant piping length (m)–7)

+ 28 hidden pages