Mitsubishi Electric MUCF-GA35VB User manual

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
FLOOR AND CEILING TYPE AIR CONDITIONERS
HFC
utilized
R410A
MUCF-GA35VB -
MUCF-GA50VB -
MUCF-GA60VB - E1
E1
E1
SERVICE MANUAL
Wireless type
Models
OUTDOOR UNIT
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).
Indoor unit service manual
MCF-GA•VB Series (OB382)
No. OB383
REVISED EDITION-A
Revision A:
●RoHS PARTS LIST has been added.
Please void OB383.
MUCF-GA50VB
OB383A--1.qxp 06.5.9 7:08 PM Page 1

TECHNICAL CHANGES
2
1
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.
E1E1
E1E1
E1E1
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 Destruction Parameter : based on CFC-11
w2 :Global Warmth Parameter : based on CO2
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.
Revision A :
• RoHS PARTS LIST has been added.
OB383A--1.qxp 06.5.9 7:08 PM Page 2

3
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])
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 30 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
(:)
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])
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 R410Awith a charging cylinder because the
refrigerant bubbles due to high pressure and high-speed vaporization
No
No
No
Yes
Yes
New
New
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
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.
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4
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
15.88
17
22
26
29
Dimension of flare nut
R22
17
22
24
27
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”.
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.
2.Refrigerant piping
1Specifications
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.
Wall
thickness
Outside diameter
Pipe mm
For liquid
For gas
6.35
9.52
12.7
15.88
0.8 mm
0.8 mm
0.8 mm
1.0 mm
Heat resisting foam plastic
Specific gravity 0.045 Thickness 8 mm
Insulation material
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5
PART NAMES AND FUNCTIONS
2
Drain hose
Piping
Air inlet
Drain outlet
(back and side)
Air outlet
MUCF-GA50VB
MUCF-GA60VB
MUCF-GA35VB
SPECIFICATION
3
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)
kW
r/h
K/h
A
A
W
%
A
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
MUCF-GA50VB
Cooling
Single phase
230V, 50Hz
4.8
2.4
2,196
15
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
1.45
520 (NEO22)
MUCF-GA60VB
Cooling
Single phase
230V, 50Hz
6.0
3.1
2,322
25
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
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
10
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
1
0.75
620 (NEO22)
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
Piping
Drain hose
Air outlet
Air inlet
Drain outlet
(back and side)
OB383A--1.qxp 06.5.9 7:08 PM Page 5

NOISE CRITERIA CURVES
6
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
Test conditions,
Cooling : Dry-bulb temperature 35:Wet-bulb temperature 24:
53
SPL(dB(A)) LINE
COOLING
FUNCTION
High
FAN SPEED
MUCF-GA60VB
NOISE CRITERIA CURVES
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
Test conditions,
Cooling : Dry-bulb temperature 35:Wet-bulb temperature 24:
52
SPL(dB(A)) LINE
COOLING
FUNCTION
High
FAN SPEED
MUCF-GA50VB
OUTDOOR UNIT
MICROPHONE
1m
49
SPL(dB(A)) LINE
COOLING
FUNCTION
High
FAN SPEED
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
Test conditions,
Cooling : Dry-bulb temperature 35:Wet-bulb temperature 24:
MUCF-GA35VB
OB383A--1.qxp 06.5.9 7:08 PM Page 6

7
OUTLINES AND DIMENSIONS
5
Unit: mm
MUCF-GA50VB MUCF-GA60VB
100mm or more
100mmor more
100mm or more
350mm or more
500mmor more
Drainage
3 holes [33 Air out
Air in
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-
30-
30
100
161
157
74
850
500
183
20 292
605 248
35
350
50
290
310 345
20
355
90
Drainage
hole [16.2
320
25
43-
35-
155
90
104
74
260
10
780
500
122
40
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
Air in
109 32
110
147
Drainage
3 holes [33
100mm or more
100mm or more
100mm or more
350mm or more
REQUIRED SPACE
400mmor more
Unit: mm
MUCF-GA35VB
OB383A--1.qxp 06.5.9 7:08 PM Page 7

WIRING DIAGRAM
8
6
MUCF-GA50VB
BRN
WHT
WHT
POWER SUPPLY
230V 50Hz
~/N
TB1
CIRCUIT BREAKER
PE
BLU
N
GRN/YLW
BRN
L
NO COM
52C
TB2
CONNECTING
12V
INDOOR UNIT
TO
BLK
1
WHT
2
52C
C2
4
WHT
ORN
RED
2
3
1
RED
C1
BLK
BLK
ORN
WHT
RED
MF
R
MC
S
C
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
MUCF-GA35VB
CIRCUIT BREAKER
POWER SUPPLY
~/N
230V 50Hz
12V
GRN/YLW
TB2
RED
WHT
BLK
WHT
BLU 3
2
1
RED MF
C2
MC
C1
SR
C
N
2
TO
INDOOR UNIT
CONNECTING
WHT
BLU
BLK
RED
WHT
52C
TB1
WHT
BLK
52C
PE
L
1
NO COM
DSAR
BRN
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)
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
OB383A--1.qxp 06.5.9 7:08 PM Page 8

9
MUCF-GA60VB
TB1
RED MC
~/N
230V 50Hz
POWER SUPPLY
52C
GRN/YLW
PE
N
CIRCUIT BREAKER
X1
NO
L
NO
REDRED
WHT
BLU
ORN
C2 WHT
3
4BLK
1
2ORN
COM
BLU
COM
52C BLK S
MF
R
C
12V
INDOOR UNIT
CONNECTING
TO X1
1BLK
BRN
WHT
2
TB2
DSAR
WHT
C1
BLU
BRN
WHT
BRN
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
X1
52C
NAME
RELAY
COMPRESSOR CONTACTOR
OB383A--1.qxp 06.5.9 7:08 PM Page 9

REFRIGERANT SYSTEM DIAGRAM
10
7
MUCF-GA35VB Refrigerant pipe [12.7
(with heat insulator)
Stop valve
(with service port)
Strainer
#100
Refrigerant pipe [6.35
(with heat insulator)
Stop valve
Capillary tube
[3.0x[1.4x550
Refrigerant flow in cooling
Outdoor
heat
exchanger
Compressor
Flared connection
Flared connection
Muffler
Unit:mm
MUCF-GA50VB
Refrigerant pipe [12.7
(with heat insulator)
Flared connection
Flared connection
Refrigerant pipe[6.35
(with heat insulator)
Stop
valve
Compressor
Stop valve
(with service
port) Outdoor
heat
exchanger
Refrigerant flow in cooling
Oil separator
Capillary tube
[3.0o[1.6o650
Capillary tube
[2.5o[0.6o1,000
Strainer
#100
OB383A--1.qxp 06.5.9 7:08 PM Page 10