Pioneer Air Conditioner Muh Ga20vb User Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS  
No. OB387  
HFC  
utilized  
R410A  
SERVICE MANUAL  
Wireless type  
Models  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
E1  
E1  
CONTENTS  
1. TECHNICAL CHANGES ····································2  
2. PART NAMES AND FUNCTIONS······················6  
3. SPECIFICATION·················································6  
4. NOISE CRITERIA CURVES·······························7  
5. OUTLINES AND DIMENSIONS ·························8  
6. WIRING DIAGRAM ············································9  
7. REFRIGERANT SYSTEM DIAGRAM··············10  
8. PERFORMANCE CURVES ······························11  
9. SERVICE FUNCTIONS ····································22  
10. TROUBLESHOOTING······································22  
11. DISASSEMBLY INSTRUCTIONS·····················29  
12. PARTS LIST······················································32  
Indication of  
model name  
E1  
E1  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
NOTE:  
•This manual describes technical data of outdoor units.  
E1  
•As for indoor units MSC-GA20/GA25/GA35VB - , refer to the service manual OB385.  
E1  
•As for indoor units MSC-CA20/CA25/CA35VB - , refer to the service manual OB393.  
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.  
New refrigerant  
Previous refrigerant  
R22  
Refrigerant  
R410A  
Composition (Ratio)  
HFC-32: HFC-125 (50%:50%)  
R22 (100%)  
Single refrigerant  
Included  
A1  
Refrigerant handling  
Pseudo-azeotropic refrigerant  
Chlorine  
Not included  
Safety group (ASHRAE)  
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  
0.055  
ODP w1  
0
GWP w2  
1730  
1700  
Refrigerant charge method  
From liquid phase in cylinder  
Gas phase  
Possible  
Compatible oil  
Light yellow  
Non  
Additional charge on leakage  
Possible  
Incompatible oil  
Non  
Kind  
Color  
Smell  
Non  
w1:Ozone Destruction Parameter : based on CFC-11  
w2 :Global Warmth Parameter  
: based on CO2  
New Specification  
The incompatible refrigeration oil easily separates from  
refrigerant and is in the upper layer inside the suction muffler. refrigeration oil goes back to the compressor through the  
Current Specification  
Since refrigerant and refrigerating oil are compatible each,  
Raising position of the oil back hole enables to back the  
refrigeration oil of the upper layer to flow back to the  
lower position oil back hole.  
compressor.  
Suction muffler  
Suction muffler  
Oil back hole  
Compressor  
Compressor  
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])  
3
Conversion chart of refrigerant temperature and pressure  
(MPa [Gauge])  
4.0  
3.5  
R410A  
3.0  
R22  
2.5  
2.0  
NOTE : The unit of pressure has been changed to MPa on the  
1.5  
1.0  
0.5  
0.0  
-0.5  
international system of units(SI unit system).  
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/f [Gauge])  
-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.  
Description  
R410A tools  
Can R22 tools be used?  
No  
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.  
Gauge manifold  
Hose material and cap size have been changed to improve the pressure  
resistance.  
Charge hose  
No  
No  
Gas leak detector  
Dedicated for HFC refrigerant.  
Torque wrench  
Yes  
6.35 mm and 9.52 mm  
Flare tool  
Yes  
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).  
Flare gauge  
New  
Vacuum pump  
adapter  
Provided to prevent the back flow of oil. This adapter enables you to use  
vacuum pumps.  
New  
New  
It is difficult to measure R410A with a charging cylinder because the  
refrigerant bubbles due to high pressure and high-speed vaporization  
Electronic scale for  
refrigerant charging  
No : Not Substitutable for R410A Yes : Substitutable for R410A  
2.Refrigerant piping  
1Specifications  
Use the refrigerant pipes that meet the following specifications.  
Outside diameter  
Wall  
Pipe  
Insulation material  
mm  
6.35  
9.52  
thickness  
0.8 mm  
0.8 mm  
For liquid  
For gas  
Heat resisting foam plastic  
Specific gravity 0.045 Thickness 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.  
4
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”.  
Dimension of flare nut  
Pipe diameter  
R410A  
mm  
6.35  
9.52  
R22  
17  
17  
22  
22  
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, 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  
Outdoor unit  
Gas pipe  
Refrigerant gas  
cylinder  
operating valve  
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  
OUTDOOR UNIT  
ACCESSORIES  
E1  
E1  
MUH-GA20VB-  
MUH-GA25VB-  
MUH-GA35VB-  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
E1  
E1  
E1  
E1  
Air inlet  
back : MUH-GA20VB  
back and side : MUH-GA25VB  
MUH-GA35VB  
<Outdoor unit: MUH type>  
(
)
1
1 Drain socket  
Piping  
Drain hose  
Air outlet  
Drain outlet  
3
SPECIFICATION  
E1  
E1  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
Outdoor model  
Single phase  
230V,50Hz  
Single phase  
230V,50Hz  
Single phase  
230V,50Hz  
Outdoor unit power supply  
Cooling  
2.3  
0.9  
Heating  
2.5  
Function  
Cooling  
2.65  
1.1  
Heating  
3.0  
Cooling  
3.5  
1.7  
Heating  
3.7  
Capacity  
kW  
R/h  
K /h  
A
Dehumidification  
Outdoor air flow  
Power outlet  
1800  
10  
1902  
10  
1902  
10  
Running current  
Power input  
A
W
3.00  
680  
2.86  
655  
3.43  
785  
3.43  
785  
4.65  
1,050  
4.34  
980  
Auxiliary heater  
Power factor  
Starting current  
Compressor motor current  
Fan motor current  
A(kW)  
%
A
A
A
21  
22  
27  
99  
100  
2.62  
3.62  
100  
3.10  
3.23  
100  
3.10  
3.66  
98  
98  
2.76  
4.32  
4.01  
0.25  
0.33  
0.33  
3.22  
Coefficient of performance (C.O.P)  
Model  
3.21  
3.63  
RN092VHSHT  
600  
RN135VHSHT  
900  
RN104VHSHT  
700  
Output  
W
Winding  
resistance (at 20:)  
Model  
C-R 3.87  
C-S 6.14  
RA6V21-AD  
WHT-BLK 366  
BLK-RED 274  
800o550o285  
32  
C-R 2.79  
C-S 3.36  
RA6V33-KB  
WHT-BLK 215  
BLK-RED 307  
800o550o285  
35  
C-R 3.40  
C-S 4.56  
RA6V33-KB  
WHT-BLK 215  
BLK-RED 307  
800o550o285  
32  
"
Winding  
"
resistance (at 20:)  
Dimensions WOHOD  
Weight  
mm  
kg  
Sound level  
dB  
47  
49  
49  
Fan speed  
rpm  
745  
855  
855  
Fan speed regulator  
Refrigerant filling  
capacity (R410A)  
Refrigeration oil (Model)  
Thermistor RT61 (at 0:)  
1
1
1
kg  
0.65  
0.80  
0.80  
350 (NEO22)  
33.18  
620 (NEO22)  
33.18  
350 (NEO22)  
33.18  
cc  
k"  
NOTE: Test conditions are based on ISO 5151.  
Cooling : Indoor DB27°C WB19°C  
Outdoor DB35°C WB24°C  
Heating : Indoor  
DB20°C  
Outdoor DB 7°C/WB 6°C  
Indoor-Outdoor piping length : 5m  
6
4
NOISE CRITERIA CURVES  
SPL(dB(A))  
47  
LINE  
SPL(dB(A))  
49  
LINE  
FUNCTION  
COOLING  
HEATING  
FUNCTION  
COOLING  
HEATING  
MUH-GA25VB- E1  
MUH-GA35VB- E1  
MUH-GA20VB- E1  
Test conditions,  
Test conditions,  
Cooling :DB35:  
Heating :DB 7:  
WB24:  
WB 6:  
Cooling :DB35:  
Heating :DB 7:  
WB24:  
WB 6:  
90  
80  
70  
60  
50  
40  
30  
90  
80  
70  
60  
50  
40  
30  
NC-70  
NC-70  
NC-60  
NC-50  
NC-40  
NC-30  
NC-60  
NC-50  
NC-40  
NC-30  
APPROXIMATE  
APPROXIMATE  
20  
20  
TERESHOLD OF  
HEARING FOR  
CONTINUOUS  
NOISE  
TERESHOLD OF  
HEARING FOR  
CONTINUOUS  
NOISE  
NC-20  
NC-20  
10  
10  
63  
125  
250  
500  
1000  
2000  
4000  
8000  
63  
125  
250  
500  
1000  
2000  
4000  
8000  
BAND CENTER FREQUENCIES, Hz  
BAND CENTER FREQUENCIES, Hz  
OUTDOORUNIT  
1m  
MICROPHONE  
7
5
OUTLINES AND DIMENSIONS  
E1  
E1  
E1  
Unit: mm  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
OUTDOOR UNIT  
REQUIRED SPACE  
Basically open 100mm or more  
without any obstruction in front  
and on both sides of the unit.  
400  
Air in  
Drain hole [42  
Air in  
(MUH-GA25  
/GA35VB)  
Open two sides of left,  
right, or rear side.  
40  
2 holes 10X21  
Service panel  
Air out  
23  
22.3  
Liquid refrigerant pipe joint  
Refrigerant pipe (flared) [6.35  
Handle  
Gas refrigerant pipe joint  
Refrigerant pipe (flared) [9.52  
150  
69  
170.5  
302.5  
Service port  
500 Bolt pitch for installation  
800  
8
6
WIRING DIAGRAM  
E1  
E1  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
MODELS WIRING DIAGRAM  
OUTDOOR UNIT  
21S4  
RT61  
TB2  
3
RED  
BLK  
CN661  
CN721  
CN711  
WHT  
BLK  
N
CIRCUIT  
MF  
BREAKER  
RED  
SR61  
BRN  
BLU  
TB1  
L
T61  
4
N
TAB20  
52C  
3
BRN  
WHT  
PE  
C
BLU  
RED  
BLK  
S
MC  
R
C1  
SYMBOL  
NAME  
SYMBOL  
MF  
NAME  
SYMBOL  
T61  
NAME  
TRANS FORMER  
TERMINAL BLOCK  
R.V. COIL  
C1  
COMPRESSOR CAPACITOR  
OUTDOOR FAN CAPACITOR  
OUTDOOR FAN MOTOR  
(INNER FUSE)  
C65  
TB1,TB2  
21S4  
DSAR SURGE ABSORBER  
NR61 VARISTOR  
F61  
MC  
FUSE(2A)  
RT61 DEFROST THERMISTOR  
SR61,SR62 SOLID STATE RELAY  
52C  
COMPRESSOR CONTACTOR  
COMPRESSOR(INNER PROTECTOR)  
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  
9
7
REFRIGERANT SYSTEM DIAGRAM  
Unit:mm  
E1  
E1  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
OUTDOOR UNIT  
Refrigerant pipe [ 9.52  
4-way valve  
(with heat insulator)  
Stop valve  
(with service  
port)  
Outdoor  
heat  
exchanger  
Defrost  
thermistor  
RT61  
Flared connection  
Muffler  
Compressor  
Capillary tube  
[3.0x[1.4x700 (MUH-GA20VB)  
[3.0x[1.4x1000(MUH-GA25VB)  
[3.0x[1.4x500 (MUH-GA35VB)  
Check valve  
Flared connection  
R.V. coil  
heating ON  
cooling OFF  
Strainer  
#100  
Capillary tube  
Stop valve  
[3.0x[1.4x500 (MUH-GA20VB)  
[3.0x[1.4x600 (MUH-GA25VB)  
[3.0x[1.4x300 (MUH-GA35VB)  
Refrigerant pipe [6.35  
(with heat insulator)  
Refrigerant flow in cooling  
Refrigerant flow in heating  
10  
MAX. REFRIGERANT PIPING LENGTH  
Refrigerant piping  
Piping size O.D : mm  
Length of connecting pipe : m  
Model  
Max. length : m  
A
Outdoor unit  
Gas  
Liquid  
Indoor unit  
MUH-GA20VB - E1  
MUH-GA25VB - E1  
Gas 0  
Gas 0.43  
Liquid 0.5  
20  
9.52  
6.35  
Liquid 0  
MUH-GA35VB - E1  
25  
MAX. HEIGHT DIFFERENCE  
Indoor  
unit  
Height difference should be within  
10m regardless of which unit,  
indoor or outdoor position is high.  
Refrigerant Piping  
Max.length  
A
w Max. Height  
difference 10m  
Outdoor unit  
ADDITIONAL REFRIGERANT CHARGE(R410A : g)  
Refrigerant piping length (one way)  
Model  
Outdoor unit precharged  
650  
7m  
10m  
15m  
20m  
25m  
MUH-GA20VB - E1  
MUH-GA25VB - E1  
MUH-GA35VB - E1  
0
60  
160  
260  
800  
360  
Calculation : Xg = 20g/m x (A-7)m  
8
PERFORMANCE CURVES  
E1  
E1  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
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 pro-  
vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.  
(1) GUARANTEED VOLTAGE  
198~264V  
(2) AIR FLOW  
Air flow should be set at MAX.  
(3) MAIN READINGS  
(1) Indoor intake air wet-bulb temperature :  
(2) Indoor outlet air wet-bulb temperature :  
(3) Outdoor intake air dry-bulb temperature :  
(4) Total input:  
(5) Indoor intake air dry-bulb temperature :  
(6) Outdoor intake air wet-bulb temperature :  
(7) Total input :  
°CWB  
°CWB  
°CDB  
W
°CDB  
°CWB  
W
Cooling  
Heating  
}
}
Indoor air wet/dry-bulb temperature difference on the left side of the chart on page 10 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.  
11  
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  
thermometers  
Wet-and dry-bulb  
thermometers  
8-1.CAPACITY AND THE INPUT CURVES  
8.5  
7.8  
7.1  
6.4  
5.8  
5.1  
10.011.0  
9.2 10.0  
8.3 9.1  
7.5 8.2  
6.8 7.4  
6.0 6.5  
24.0  
22.1  
19.2  
20.0  
18.5  
17.8  
16.3  
14.8  
20.3  
18.4  
16.6  
14.7  
16.9  
15.4  
13.9  
12.3  
13.3  
11.8  
10.4  
8.9  
12.9  
11.1  
10.8  
9.2  
NOTE:The above curves are for the heating operation without any frost.  
12  
8-2.OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT  
COOL operation  
Both indoor and outdoor unit are under the same temperature/humidity condition.  
Relative humidity(%)  
Dry-bulb temperature  
20  
50  
60  
70  
25  
30  
Air flow should be set at MAX.  
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] )  
E1  
E1  
(kgf/F[Gauge])(MPa[Gauge])  
MUH-GA20VB -  
MUH-GA20VB -  
4
3
2
1
1.3  
1.2  
1.1  
1.0  
0.9  
0.8  
0.7  
13  
12  
11  
10  
9
230V  
230V  
8
7
15  
18 20  
50  
25  
60  
30 32 35(:)  
70(%)  
Ambient temperature(˚C)  
Ambient humidity(%)  
18  
32  
35(:)  
15  
20  
50  
25  
60  
30  
70(%)  
Ambient temperature(˚C)  
Ambient humidity(%)  
E1  
(kgf/F[Gauge])(MPa[Gauge])  
MUH-GA25VB -  
E1  
MUH-GA25VB -  
1.3  
4
13  
230V  
230V  
1.2  
12  
1.1  
11  
3
2
1
1.0  
10  
0.9  
9
0.8  
8
0.7  
7
15 18 20  
50  
25  
60  
30 32 35(:)  
70(%)  
15  
18 20  
50  
25  
60  
30 32 35(:)  
70(%)  
Ambient temperature(˚C)  
Ambient humidity(%)  
Ambient temperature(˚C)  
Ambient humidity(%)  
(kgf/F[Gauge])(MPa[Gauge])  
E1  
MUH-GA35VB -  
E1  
MUH-GA35VB -  
6
5
4
3
1.3  
1.2  
1.1  
1.0  
0.9  
0.8  
0.7  
13  
12  
11  
10  
9
230V  
230V  
8
7
18  
32  
70(%)  
15  
20  
50  
25  
60  
30  
35(:)  
15 18 20  
50  
25  
60  
30 32  
70(%)  
35(:)  
Ambient temperature(˚C)  
Ambient humidity(%)  
Ambient temperature(˚C)  
Ambient humidity(%)  
13  
HEAT operation  
Condition indoor:Dry bulb temperature 20.0°C  
Outdoor:Dry bulb temperature 7,15,20°C  
Wet bulb temperature 6,12,14.5°C  
Wet bulb temperature 14.5°C  
E1  
E1  
MUH-GA25VB -  
MUH-GA20VB -  
5
5
4
230V  
4
230V  
3
3
2
5
2
10  
15  
20 21  
25(:)  
7
(:)  
25  
21  
5
7
10  
15  
20  
Ambient temperature(˚C)  
Ambient temperature(˚C)  
E1  
MUH-GA35VB -  
6
5
4
3
230V  
(:)  
25  
5
10  
15  
20 21  
7
Ambient temperature(˚C)  
14  
PERFORMANCE DATA  
COOL operation (230V)  
E1  
E1  
MSC-GA20VB -  
: MUH-GA20VB -  
CAPACITY : 2.3(kW) SHF : 0.74 INPUT : 715(W)  
OUTDOOR DB(:)  
INDOOR INDOOR  
21  
25  
27  
30  
DB(:) WB(:)  
Q
SHC SHF INPUT  
Q
SHC SHF INPUT  
Q
SHC SHF INPUT  
Q
SHC SHF INPUT  
21  
21  
22  
22  
22  
23  
23  
23  
24  
24  
24  
24  
25  
25  
25  
25  
26  
26  
26  
26  
26  
27  
27  
27  
27  
27  
28  
28  
28  
28  
28  
29  
29  
29  
29  
29  
30  
30  
30  
30  
30  
31  
31  
31  
31  
31  
32  
32  
32  
32  
32  
18  
20  
18  
20  
22  
18  
20  
22  
18  
20  
22  
24  
18  
20  
22  
24  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
2.70 1.51 0.56 572 2.59 1.45 0.56 601 2.48 1.39 0.56 629 2.39 1.34 0.56 658  
2.82 1.24 0.44 601 2.70 1.19 0.44 636 2.62 1.15 0.44 651 2.53 1.11 0.44 679  
2.70 1.62 0.60 572 2.59 1.55 0.60 601 2.48 1.49 0.60 629 2.39 1.44 0.60 658  
2.82 1.35 0.48 601 2.70 1.30 0.48 636 2.62 1.26 0.48 651 2.53 1.21 0.48 679  
2.93 1.06 0.36 622 2.83 1.02 0.36 661 2.76 0.99 0.36 679 2.65 0.95 0.36 708  
2.70 1.73 0.64 572 2.59 1.66 0.64 601 2.48 1.59 0.64 629 2.39 1.53 0.64 658  
2.82 1.47 0.52 601 2.70 1.41 0.52 636 2.62 1.36 0.52 651 2.53 1.32 0.52 679  
2.93 1.17 0.40 622 2.83 1.13 0.40 661 2.76 1.10 0.40 679 2.65 1.06 0.40 708  
2.70 1.84 0.68 572 2.59 1.76 0.68 601 2.48 1.69 0.68 629 2.39 1.63 0.68 658  
2.82 1.58 0.56 601 2.70 1.51 0.56 636 2.62 1.47 0.56 651 2.53 1.42 0.56 679  
2.93 1.29 0.44 622 2.83 1.24 0.44 661 2.76 1.21 0.44 679 2.65 1.16 0.44 708  
3.08 0.99 0.32 651 2.97 0.95 0.32 686 2.90 0.93 0.32 708 2.81 0.90 0.32 744  
2.70 1.95 0.72 572 2.59 1.86 0.72 601 2.48 1.79 0.72 629 2.39 1.72 0.72 658  
2.82 1.69 0.60 601 2.70 1.62 0.60 636 2.62 1.57 0.60 651 2.53 1.52 0.60 679  
2.93 1.41 0.48 622 2.83 1.36 0.48 661 2.76 1.32 0.48 679 2.65 1.27 0.48 708  
3.08 1.11 0.36 651 2.97 1.07 0.36 686 2.90 1.04 0.36 708 2.81 1.01 0.36 744  
2.70 2.05 0.76 572 2.59 1.97 0.76 601 2.48 1.89 0.76 629 2.39 1.82 0.76 658  
2.82 1.80 0.64 601 2.70 1.73 0.64 636 2.62 1.68 0.64 651 2.53 1.62 0.64 679  
2.93 1.52 0.52 622 2.83 1.47 0.52 661 2.76 1.44 0.52 679 2.65 1.38 0.52 708  
3.08 1.23 0.40 651 2.97 1.19 0.40 686 2.90 1.16 0.40 708 2.81 1.12 0.40 744  
3.17 0.89 0.28 686 3.08 0.86 0.28 722 3.04 0.85 0.28 744 2.94 0.82 0.28 765  
2.70 2.16 0.80 572 2.59 2.07 0.80 601 2.48 1.99 0.80 629 2.39 1.91 0.80 658  
2.82 1.92 0.68 601 2.70 1.84 0.68 636 2.62 1.78 0.68 651 2.53 1.72 0.68 679  
2.93 1.64 0.56 622 2.83 1.58 0.56 661 2.76 1.55 0.56 679 2.65 1.48 0.56 708  
3.08 1.36 0.44 651 2.97 1.31 0.44 686 2.90 1.28 0.44 708 2.81 1.23 0.44 744  
3.17 1.02 0.32 686 3.08 0.99 0.32 722 3.04 0.97 0.32 744 2.94 0.94 0.32 765  
2.70 2.27 0.84 572 2.59 2.17 0.84 601 2.48 2.09 0.84 629 2.39 2.01 0.84 658  
2.82 2.03 0.72 601 2.70 1.95 0.72 636 2.62 1.89 0.72 651 2.53 1.82 0.72 679  
2.93 1.76 0.60 622 2.83 1.70 0.60 661 2.76 1.66 0.60 679 2.65 1.59 0.60 708  
3.08 1.48 0.48 651 2.97 1.42 0.48 686 2.90 1.39 0.48 708 2.81 1.35 0.48 744  
3.17 1.14 0.36 686 3.08 1.11 0.36 722 3.04 1.09 0.36 744 2.94 1.06 0.36 765  
2.70 2.38 0.88 572 2.59 2.28 0.88 601 2.48 2.19 0.88 629 2.39 2.10 0.88 658  
2.82 2.14 0.76 601 2.70 2.05 0.76 636 2.62 1.99 0.76 651 2.53 1.92 0.76 679  
2.93 1.88 0.64 622 2.83 1.81 0.64 661 2.76 1.77 0.64 679 2.65 1.69 0.64 708  
3.08 1.60 0.52 651 2.97 1.54 0.52 686 2.90 1.51 0.52 708 2.81 1.46 0.52 744  
3.17 1.27 0.40 686 3.08 1.23 0.40 722 3.04 1.21 0.40 744 2.94 1.18 0.40 765  
2.70 2.49 0.92 572 2.59 2.38 0.92 601 2.48 2.29 0.92 629 2.39 2.20 0.92 658  
2.82 2.25 0.80 601 2.70 2.16 0.80 636 2.62 2.10 0.80 651 2.53 2.02 0.80 679  
2.93 1.99 0.68 622 2.83 1.92 0.68 661 2.76 1.88 0.68 679 2.65 1.80 0.68 708  
3.08 1.73 0.56 651 2.97 1.66 0.56 686 2.90 1.62 0.56 708 2.81 1.57 0.56 744  
3.17 1.40 0.44 686 3.08 1.36 0.44 722 3.04 1.34 0.44 744 2.94 1.30 0.44 765  
2.70 2.59 0.96 572 2.59 2.48 0.96 601 2.48 2.38 0.96 629 2.39 2.30 0.96 658  
2.82 2.37 0.84 601 2.70 2.27 0.84 636 2.62 2.20 0.84 651 2.53 2.13 0.84 679  
2.93 2.11 0.72 622 2.83 2.04 0.72 661 2.76 1.99 0.72 679 2.65 1.90 0.72 708  
3.08 1.85 0.60 651 2.97 1.78 0.60 686 2.90 1.74 0.60 708 2.81 1.68 0.60 744  
3.17 1.52 0.48 686 3.08 1.48 0.48 722 3.04 1.46 0.48 744 2.94 1.41 0.48 765  
2.70 2.70 1.00 572 2.59 2.59 1.00 601 2.48 2.48 1.00 629 2.39 2.39 1.00 658  
2.82 2.48 0.88 601 2.70 2.38 0.88 636 2.62 2.31 0.88 651 2.53 2.23 0.88 679  
2.93 2.23 0.76 622 2.83 2.15 0.76 661 2.76 2.10 0.76 679 2.65 2.01 0.76 708  
3.08 1.97 0.64 651 2.97 1.90 0.64 686 2.90 1.85 0.64 708 2.81 1.80 0.64 744  
3.17 1.65 0.52 686 3.08 1.60 0.52 722 3.04 1.58 0.52 744 2.94 1.53 0.52 765  
NOTE  
Q :Total capacity (kW)  
SHC :Sensible heat capacity (kW)  
SHF :Sensible heat factor  
INPUT :Total power input (W)  
DB :Dry-bulb temperature  
WB :Wet-bulb temperature  
15  
PERFORMANCE DATA  
COOL operation (230V)  
E1  
E1  
MSC-GA20VB -  
: MUH-GA20VB -  
CAPACITY : 2.3(kW) SHF : 0.74 INPUT : 715(W)  
OUTDOOR DB(:)  
INDOOR INDOOR  
35  
40  
43  
DB(:) WB(:)  
Q
SHC SHF INPUT  
Q
SHC SHF INPUT  
Q
SHC SHF INPUT  
21  
21  
22  
22  
22  
23  
23  
23  
24  
24  
24  
24  
25  
25  
25  
25  
26  
26  
26  
26  
26  
27  
27  
27  
27  
27  
28  
28  
28  
28  
28  
29  
29  
29  
29  
29  
30  
30  
30  
30  
30  
31  
31  
31  
31  
31  
32  
32  
32  
32  
32  
NOTE  
18  
20  
18  
20  
22  
18  
20  
22  
18  
20  
22  
24  
18  
20  
22  
24  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
2.25 1.26 0.56 701 2.07 1.16 0.56 744 1.99 1.11 0.56 758  
2.37 1.04 0.44 729 2.21 0.97 0.44 765 2.13 0.94 0.44 787  
2.25 1.35 0.60 701 2.07 1.24 0.60 744 1.99 1.19 0.60 758  
2.37 1.14 0.48 729 2.21 1.06 0.48 765 2.13 1.02 0.48 787  
2.51 0.90 0.36 758 2.35 0.84 0.36 801 2.27 0.82 0.36 815  
2.25 1.44 0.64 701 2.07 1.32 0.64 744 1.99 1.27 0.64 758  
2.37 1.23 0.52 729 2.21 1.15 0.52 765 2.13 1.11 0.52 787  
2.51 1.00 0.40 758 2.35 0.94 0.40 801 2.27 0.91 0.40 815  
2.25 1.53 0.68 701 2.07 1.41 0.68 744 1.99 1.35 0.68 758  
2.37 1.33 0.56 729 2.21 1.24 0.56 765 2.13 1.19 0.56 787  
2.51 1.10 0.44 758 2.35 1.03 0.44 801 2.27 1.00 0.44 815  
2.65 0.85 0.32 787 2.48 0.79 0.32 822 2.42 0.77 0.32 840  
2.25 1.62 0.72 701 2.07 1.49 0.72 744 1.99 1.43 0.72 758  
2.37 1.42 0.60 729 2.21 1.32 0.60 765 2.13 1.28 0.60 787  
2.51 1.20 0.48 758 2.35 1.13 0.48 801 2.27 1.09 0.48 815  
2.65 0.95 0.36 787 2.48 0.89 0.36 822 2.42 0.87 0.36 840  
2.25 1.71 0.76 701 2.07 1.57 0.76 744 1.99 1.51 0.76 758  
2.37 1.52 0.64 729 2.21 1.41 0.64 765 2.13 1.36 0.64 787  
2.51 1.30 0.52 758 2.35 1.22 0.52 801 2.27 1.18 0.52 815  
2.65 1.06 0.40 787 2.48 0.99 0.40 822 2.42 0.97 0.40 840  
2.78 0.78 0.28 815 2.62 0.73 0.28 851 2.54 0.71 0.28 869  
2.25 1.80 0.80 701 2.07 1.66 0.80 744 1.99 1.59 0.80 758  
2.37 1.61 0.68 729 2.21 1.50 0.68 765 2.13 1.45 0.68 787  
2.51 1.40 0.56 758 2.35 1.31 0.56 801 2.27 1.27 0.56 815  
2.65 1.16 0.44 787 2.48 1.09 0.44 822 2.42 1.06 0.44 840  
2.78 0.89 0.32 815 2.62 0.84 0.32 851 2.54 0.81 0.32 869  
2.25 1.89 0.84 701 2.07 1.74 0.84 744 1.99 1.67 0.84 758  
2.37 1.71 0.72 729 2.21 1.59 0.72 765 2.13 1.53 0.72 787  
2.51 1.50 0.60 758 2.35 1.41 0.60 801 2.27 1.36 0.60 815  
2.65 1.27 0.48 787 2.48 1.19 0.48 822 2.42 1.16 0.48 840  
2.78 1.00 0.36 815 2.62 0.94 0.36 851 2.54 0.91 0.36 869  
2.25 1.98 0.88 701 2.07 1.82 0.88 744 1.99 1.75 0.88 758  
2.37 1.80 0.76 729 2.21 1.68 0.76 765 2.13 1.62 0.76 787  
2.51 1.60 0.64 758 2.35 1.50 0.64 801 2.27 1.45 0.64 815  
2.65 1.38 0.52 787 2.48 1.29 0.52 822 2.42 1.26 0.52 840  
2.78 1.11 0.40 815 2.62 1.05 0.40 851 2.54 1.02 0.40 869  
2.25 2.07 0.92 701 2.07 1.90 0.92 744 1.99 1.83 0.92 758  
2.37 1.90 0.80 729 2.21 1.77 0.80 765 2.13 1.70 0.80 787  
2.51 1.70 0.68 758 2.35 1.60 0.68 801 2.27 1.54 0.68 815  
2.65 1.48 0.56 787 2.48 1.39 0.56 822 2.42 1.35 0.56 840  
2.78 1.22 0.44 815 2.62 1.15 0.44 851 2.54 1.12 0.44 869  
2.25 2.16 0.96 701 2.07 1.99 0.96 744 1.99 1.91 0.96 758  
2.37 1.99 0.84 729 2.21 1.85 0.84 765 2.13 1.79 0.84 787  
2.51 1.81 0.72 758 2.35 1.69 0.72 801 2.27 1.63 0.72 815  
2.65 1.59 0.60 787 2.48 1.49 0.60 822 2.42 1.45 0.60 840  
2.78 1.34 0.48 815 2.62 1.26 0.48 851 2.54 1.22 0.48 869  
2.25 2.25 1.00 701 2.07 2.07 1.00 744 1.99 1.99 1.00 758  
2.37 2.08 0.88 729 2.21 1.94 0.88 765 2.13 1.87 0.88 787  
2.51 1.91 0.76 758 2.35 1.78 0.76 801 2.27 1.72 0.76 815  
2.65 1.69 0.64 787 2.48 1.59 0.64 822 2.42 1.55 0.64 840  
2.78 1.45 0.52 815 2.62 1.36 0.52 851 2.54 1.32 0.52 869  
Q :Total capacity (kW)  
SHC :Sensible heat capacity (kW)  
SHF :Sensible heat factor  
DB :Dry-bulb temperature  
WB :Wet-bulb temperature  
INPUT :Total power input (W)  
16  
PERFORMANCE DATA  
COOL operation (230V)  
E1  
E1  
MSC-GA25VB -  
: MUH-GA25VB -  
CAPACITY : 2.65(kW) SHF : 0.70 INPUT : 820(W)  
OUTDOOR DB(:)  
INDOOR INDOOR  
DB(:) WB(:)  
21  
25  
SHC SHF INPUT  
27  
30  
Q
SHC SHF INPUT  
Q
Q
SHC SHF INPUT  
Q
SHC SHF INPUT  
21  
21  
22  
22  
22  
23  
23  
23  
24  
24  
24  
24  
25  
25  
25  
25  
26  
26  
26  
26  
26  
27  
27  
27  
27  
27  
28  
28  
28  
28  
28  
29  
29  
29  
29  
29  
30  
30  
30  
30  
30  
31  
31  
31  
31  
31  
32  
32  
32  
32  
32  
NOTE  
18  
20  
18  
20  
22  
18  
20  
22  
18  
20  
22  
24  
18  
20  
22  
24  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
3.11 1.62 0.52 656 2.98 1.55 0.52 689 2.86 1.49 0.52 722 2.76 1.43 0.52 754  
3.25 1.30 0.40 689 3.11 1.25 0.40 730 3.02 1.21 0.40 746 2.92 1.17 0.40 779  
3.11 1.74 0.56 656 2.98 1.67 0.56 689 2.86 1.60 0.56 722 2.76 1.54 0.56 754  
3.25 1.43 0.44 689 3.11 1.37 0.44 730 3.02 1.33 0.44 746 2.92 1.28 0.44 779  
3.38 1.08 0.32 713 3.26 1.04 0.32 759 3.18 1.02 0.32 779 3.05 0.98 0.32 812  
3.11 1.87 0.60 656 2.98 1.79 0.60 689 2.86 1.72 0.60 722 2.76 1.65 0.60 754  
3.25 1.56 0.48 689 3.11 1.49 0.48 730 3.02 1.45 0.48 746 2.92 1.40 0.48 779  
3.38 1.22 0.36 713 3.26 1.17 0.36 759 3.18 1.14 0.36 779 3.05 1.10 0.36 812  
3.11 1.99 0.64 656 2.98 1.91 0.64 689 2.86 1.83 0.64 722 2.76 1.76 0.64 754  
3.25 1.69 0.52 689 3.11 1.62 0.52 730 3.02 1.57 0.52 746 2.92 1.52 0.52 779  
3.38 1.35 0.40 713 3.26 1.30 0.40 759 3.18 1.27 0.40 779 3.05 1.22 0.40 812  
3.55 0.99 0.28 746 3.42 0.96 0.28 787 3.34 0.93 0.28 812 3.23 0.91 0.28 853  
3.11 2.12 0.68 656 2.98 2.03 0.68 689 2.86 1.95 0.68 722 2.76 1.87 0.68 754  
3.25 1.82 0.56 689 3.11 1.74 0.56 730 3.02 1.69 0.56 746 2.92 1.63 0.56 779  
3.38 1.49 0.44 713 3.26 1.43 0.44 759 3.18 1.40 0.44 779 3.05 1.34 0.44 812  
3.55 1.14 0.32 746 3.42 1.09 0.32 787 3.34 1.07 0.32 812 3.23 1.03 0.32 853  
3.11 2.24 0.72 656 2.98 2.15 0.72 689 2.86 2.06 0.72 722 2.76 1.98 0.72 754  
3.25 1.95 0.60 689 3.11 1.87 0.60 730 3.02 1.81 0.60 746 2.92 1.75 0.60 779  
3.38 1.62 0.48 713 3.26 1.56 0.48 759 3.18 1.53 0.48 779 3.05 1.46 0.48 812  
3.55 1.28 0.36 746 3.42 1.23 0.36 787 3.34 1.20 0.36 812 3.23 1.16 0.36 853  
3.66 0.88 0.24 787 3.55 0.85 0.24 828 3.50 0.84 0.24 853 3.39 0.81 0.24 877  
3.11 2.37 0.76 656 2.98 2.27 0.76 689 2.86 2.18 0.76 722 2.76 2.09 0.76 754  
3.25 2.08 0.64 689 3.11 1.99 0.64 730 3.02 1.93 0.64 746 2.92 1.87 0.64 779  
3.38 1.76 0.52 713 3.26 1.69 0.52 759 3.18 1.65 0.52 779 3.05 1.58 0.52 812  
3.55 1.42 0.40 746 3.42 1.37 0.40 787 3.34 1.34 0.40 812 3.23 1.29 0.40 853  
3.66 1.02 0.28 787 3.55 0.99 0.28 828 3.50 0.98 0.28 853 3.39 0.95 0.28 877  
3.11 2.49 0.80 656 2.98 2.39 0.80 689 2.86 2.29 0.80 722 2.76 2.20 0.80 754  
3.25 2.21 0.68 689 3.11 2.12 0.68 730 3.02 2.05 0.68 746 2.92 1.98 0.68 779  
3.38 1.89 0.56 713 3.26 1.83 0.56 759 3.18 1.78 0.56 779 3.05 1.71 0.56 812  
3.55 1.56 0.44 746 3.42 1.50 0.44 787 3.34 1.47 0.44 812 3.23 1.42 0.44 853  
3.66 1.17 0.32 787 3.55 1.14 0.32 828 3.50 1.12 0.32 853 3.39 1.09 0.32 877  
3.11 2.62 0.84 656 2.98 2.50 0.84 689 2.86 2.40 0.84 722 2.76 2.32 0.84 754  
3.25 2.34 0.72 689 3.11 2.24 0.72 730 3.02 2.18 0.72 746 2.92 2.10 0.72 779  
3.38 2.03 0.60 713 3.26 1.96 0.60 759 3.18 1.91 0.60 779 3.05 1.83 0.60 812  
3.55 1.70 0.48 746 3.42 1.64 0.48 787 3.34 1.60 0.48 812 3.23 1.55 0.48 853  
3.66 1.32 0.36 787 3.55 1.28 0.36 828 3.50 1.26 0.36 853 3.39 1.22 0.36 877  
3.11 2.74 0.88 656 2.98 2.62 0.88 689 2.86 2.52 0.88 722 2.76 2.43 0.88 754  
3.25 2.47 0.76 689 3.11 2.37 0.76 730 3.02 2.30 0.76 746 2.92 2.22 0.76 779  
3.38 2.16 0.64 713 3.26 2.09 0.64 759 3.18 2.04 0.64 779 3.05 1.95 0.64 812  
3.55 1.85 0.52 746 3.42 1.78 0.52 787 3.34 1.74 0.52 812 3.23 1.68 0.52 853  
3.66 1.46 0.40 787 3.55 1.42 0.40 828 3.50 1.40 0.40 853 3.39 1.36 0.40 877  
3.11 2.86 0.92 656 2.98 2.74 0.92 689 2.86 2.63 0.92 722 2.76 2.54 0.92 754  
3.25 2.60 0.80 689 3.11 2.49 0.80 730 3.02 2.42 0.80 746 2.92 2.33 0.80 779  
3.38 2.30 0.68 713 3.26 2.22 0.68 759 3.18 2.16 0.68 779 3.05 2.07 0.68 812  
3.55 1.99 0.56 746 3.42 1.91 0.56 787 3.34 1.87 0.56 812 3.23 1.81 0.56 853  
3.66 1.61 0.44 787 3.55 1.56 0.44 828 3.50 1.54 0.44 853 3.39 1.49 0.44 877  
3.11 2.99 0.96 656 2.98 2.86 0.96 689 2.86 2.75 0.96 722 2.76 2.65 0.96 754  
3.25 2.73 0.84 689 3.11 2.62 0.84 730 3.02 2.54 0.84 746 2.92 2.45 0.84 779  
3.38 2.43 0.72 713 3.26 2.35 0.72 759 3.18 2.29 0.72 779 3.05 2.19 0.72 812  
3.55 2.13 0.60 746 3.42 2.05 0.60 787 3.34 2.00 0.60 812 3.23 1.94 0.60 853  
3.66 1.76 0.48 787 3.55 1.70 0.48 828 3.50 1.68 0.48 853 3.39 1.63 0.48 877  
Q :Total capacity (kW)  
SHC :Sensible heat capacity (kW)  
SHF :Sensible heat factor  
DB :Dry-bulb temperature  
WB :Wet-bulb temperature  
INPUT :Total power input (W)  
17  
PERFORMANCE DATA  
COOL operation (230V)  
E1  
E1  
MSC-GA25VB -  
: MUH-GA25VB -  
CAPACITY : 2.65(kW) SHF : 0.70 INPUT : 820(W)  
OUTDOOR DB(:)  
40  
INDOOR INDOOR  
35  
43  
DB(:) WB(:)  
Q
SHC SHF INPUT  
Q
SHC SHF INPUT  
Q
SHC SHF INPUT  
21  
21  
22  
22  
22  
23  
23  
23  
24  
24  
24  
24  
25  
25  
25  
25  
26  
26  
26  
26  
26  
27  
27  
27  
27  
27  
28  
28  
28  
28  
28  
29  
29  
29  
29  
29  
30  
30  
30  
30  
30  
31  
31  
31  
31  
31  
32  
32  
32  
32  
32  
NOTE  
18  
20  
18  
20  
22  
18  
20  
22  
18  
20  
22  
24  
18  
20  
22  
24  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
2.60 1.35 0.52 804 2.39 1.24 0.52 853 2.29 1.19 0.52 869  
2.73 1.09 0.40 836 2.54 1.02 0.40 877 2.45 0.98 0.40 902  
2.60 1.45 0.56 804 2.39 1.34 0.56 853 2.29 1.28 0.56 869  
2.73 1.20 0.44 836 2.54 1.12 0.44 877 2.45 1.08 0.44 902  
2.89 0.92 0.32 869 2.70 0.86 0.32 918 2.61 0.84 0.32 935  
2.60 1.56 0.60 804 2.39 1.43 0.60 853 2.29 1.38 0.60 869  
2.73 1.31 0.48 836 2.54 1.22 0.48 877 2.45 1.18 0.48 902  
2.89 1.04 0.36 869 2.70 0.97 0.36 918 2.61 0.94 0.36 935  
2.60 1.66 0.64 804 2.39 1.53 0.64 853 2.29 1.47 0.64 869  
2.73 1.42 0.52 836 2.54 1.32 0.52 877 2.45 1.27 0.52 902  
2.89 1.16 0.40 869 2.70 1.08 0.40 918 2.61 1.04 0.40 935  
3.05 0.85 0.28 902 2.86 0.80 0.28 943 2.78 0.78 0.28 964  
2.60 1.77 0.68 804 2.39 1.62 0.68 853 2.29 1.56 0.68 869  
2.73 1.53 0.56 836 2.54 1.42 0.56 877 2.45 1.37 0.56 902  
2.89 1.27 0.44 869 2.70 1.19 0.44 918 2.61 1.15 0.44 935  
3.05 0.98 0.32 902 2.86 0.92 0.32 943 2.78 0.89 0.32 964  
2.60 1.87 0.72 804 2.39 1.72 0.72 853 2.29 1.65 0.72 869  
2.73 1.64 0.60 836 2.54 1.53 0.60 877 2.45 1.47 0.60 902  
2.89 1.39 0.48 869 2.70 1.30 0.48 918 2.61 1.25 0.48 935  
3.05 1.10 0.36 902 2.86 1.03 0.36 943 2.78 1.00 0.36 964  
3.21 0.77 0.24 935 3.02 0.73 0.24 976 2.93 0.70 0.24 996  
2.60 1.97 0.76 804 2.39 1.81 0.76 853 2.29 1.74 0.76 869  
2.73 1.75 0.64 836 2.54 1.63 0.64 877 2.45 1.57 0.64 902  
2.89 1.50 0.52 869 2.70 1.41 0.52 918 2.61 1.36 0.52 935  
3.05 1.22 0.40 902 2.86 1.14 0.40 943 2.78 1.11 0.40 964  
3.21 0.90 0.28 935 3.02 0.85 0.28 976 2.93 0.82 0.28 996  
2.60 2.08 0.80 804 2.39 1.91 0.80 853 2.29 1.83 0.80 869  
2.73 1.86 0.68 836 2.54 1.73 0.68 877 2.45 1.67 0.68 902  
2.89 1.62 0.56 869 2.70 1.51 0.56 918 2.61 1.46 0.56 935  
3.05 1.34 0.44 902 2.86 1.26 0.44 943 2.78 1.22 0.44 964  
3.21 1.03 0.32 935 3.02 0.97 0.32 976 2.93 0.94 0.32 996  
2.60 2.18 0.84 804 2.39 2.00 0.84 853 2.29 1.93 0.84 869  
2.73 1.97 0.72 836 2.54 1.83 0.72 877 2.45 1.76 0.72 902  
2.89 1.73 0.60 869 2.70 1.62 0.60 918 2.61 1.57 0.60 935  
3.05 1.46 0.48 902 2.86 1.37 0.48 943 2.78 1.34 0.48 964  
3.21 1.15 0.36 935 3.02 1.09 0.36 976 2.93 1.05 0.36 996  
2.60 2.29 0.88 804 2.39 2.10 0.88 853 2.29 2.02 0.88 869  
2.73 2.07 0.76 836 2.54 1.93 0.76 877 2.45 1.86 0.76 902  
2.89 1.85 0.64 869 2.70 1.73 0.64 918 2.61 1.67 0.64 935  
3.05 1.58 0.52 902 2.86 1.49 0.52 943 2.78 1.45 0.52 964  
3.21 1.28 0.40 935 3.02 1.21 0.40 976 2.93 1.17 0.40 996  
2.60 2.39 0.92 804 2.39 2.19 0.92 853 2.29 2.11 0.92 869  
2.73 2.18 0.80 836 2.54 2.04 0.80 877 2.45 1.96 0.80 902  
2.89 1.96 0.68 869 2.70 1.84 0.68 918 2.61 1.77 0.68 935  
3.05 1.71 0.56 902 2.86 1.60 0.56 943 2.78 1.56 0.56 964  
3.21 1.41 0.44 935 3.02 1.33 0.44 976 2.93 1.29 0.44 996  
2.60 2.49 0.96 804 2.39 2.29 0.96 853 2.29 2.20 0.96 869  
2.73 2.29 0.84 836 2.54 2.14 0.84 877 2.45 2.06 0.84 902  
2.89 2.08 0.72 869 2.70 1.95 0.72 918 2.61 1.88 0.72 935  
3.05 1.83 0.60 902 2.86 1.72 0.60 943 2.78 1.67 0.60 964  
3.21 1.54 0.48 935 3.02 1.45 0.48 976 2.93 1.41 0.48 996  
Q :Total capacity (kW)  
SHC :Sensible heat capacity (kW)  
SHF :Sensible heat factor  
DB :Dry-bulb temperature  
WB :Wet-bulb temperature  
INPUT :Total power input (W)  
18  
PERFORMANCE DATA  
COOL operation (230V)  
E1  
E1  
MSC-GA35VB -  
: MUH-GA35VB -  
CAPACITY : 3.5(kW) SHF : 0.66 INPUT : 1090(W)  
OUTDOOR DB(:)  
INDOOR INDOOR  
21  
25  
27  
30  
DB(:) WB(:)  
Q
SHC SHF INPUT  
Q
SHC SHF INPUT  
Q
SHC SHF INPUT  
Q
SHC SHF INPUT  
21  
21  
22  
22  
22  
23  
23  
23  
24  
24  
24  
24  
25  
25  
25  
25  
26  
26  
26  
26  
26  
27  
27  
27  
27  
27  
28  
28  
28  
28  
28  
29  
29  
29  
29  
29  
30  
30  
30  
30  
30  
31  
31  
31  
31  
31  
32  
32  
32  
32  
32  
18  
20  
18  
20  
22  
18  
20  
22  
18  
20  
22  
24  
18  
20  
22  
24  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
4.11 1.97 0.48 872 3.94 1.89 0.48 916 3.78 1.81 0.48 959 3.64 1.75 0.48 1003  
4.29 1.54 0.36 916 4.11 1.48 0.36 970 3.99 1.44 0.36 992 3.85 1.39 0.36 1036  
4.11 2.14 0.52 872 3.94 2.05 0.52 916 3.78 1.97 0.52 959 3.64 1.89 0.52 1003  
4.29 1.72 0.40 916 4.11 1.65 0.40 970 3.99 1.60 0.40 992 3.85 1.54 0.40 1036  
4.46 1.25 0.28 948 4.31 1.21 0.28 1008 4.20 1.18 0.28 1036 4.03 1.13 0.28 1079  
4.11 2.30 0.56 872 3.94 2.21 0.56 916 3.78 2.12 0.56 959 3.64 2.04 0.56 1003  
4.29 1.89 0.44 916 4.11 1.81 0.44 970 3.99 1.76 0.44 992 3.85 1.69 0.44 1036  
4.46 1.43 0.32 948 4.31 1.38 0.32 1008 4.20 1.34 0.32 1036 4.03 1.29 0.32 1079  
4.11 2.47 0.60 872 3.94 2.36 0.60 916 3.78 2.27 0.60 959 3.64 2.18 0.60 1003  
4.29 2.06 0.48 916 4.11 1.97 0.48 970 3.99 1.92 0.48 992 3.85 1.85 0.48 1036  
4.46 1.61 0.36 948 4.31 1.55 0.36 1008 4.20 1.51 0.36 1036 4.03 1.45 0.36 1079  
4.69 1.13 0.24 992 4.52 1.08 0.24 1046 4.41 1.06 0.24 1079 4.27 1.02 0.24 1134  
4.11 2.63 0.64 872 3.94 2.52 0.64 916 3.78 2.42 0.64 959 3.64 2.33 0.64 1003  
4.29 2.23 0.52 916 4.11 2.14 0.52 970 3.99 2.07 0.52 992 3.85 2.00 0.52 1036  
4.46 1.79 0.40 948 4.31 1.72 0.40 1008 4.20 1.68 0.40 1036 4.03 1.61 0.40 1079  
4.69 1.31 0.28 992 4.52 1.26 0.28 1046 4.41 1.23 0.28 1079 4.27 1.20 0.28 1134  
4.11 2.80 0.68 872 3.94 2.68 0.68 916 3.78 2.57 0.68 959 3.64 2.48 0.68 1003  
4.29 2.40 0.56 916 4.11 2.30 0.56 970 3.99 2.23 0.56 992 3.85 2.16 0.56 1036  
4.46 1.96 0.44 948 4.31 1.89 0.44 1008 4.20 1.85 0.44 1036 4.03 1.77 0.44 1079  
4.69 1.50 0.32 992 4.52 1.44 0.32 1046 4.41 1.41 0.32 1079 4.27 1.37 0.32 1134  
4.83 0.97 0.20 1046 4.69 0.94 0.20 1101 4.62 0.92 0.20 1134 4.48 0.90 0.20 1166  
4.11 2.96 0.72 872 3.94 2.84 0.72 916 3.78 2.72 0.72 959 3.64 2.62 0.72 1003  
4.29 2.57 0.60 916 4.11 2.47 0.60 970 3.99 2.39 0.60 992 3.85 2.31 0.60 1036  
4.46 2.14 0.48 948 4.31 2.07 0.48 1008 4.20 2.02 0.48 1036 4.03 1.93 0.48 1079  
4.69 1.69 0.36 992 4.52 1.63 0.36 1046 4.41 1.59 0.36 1079 4.27 1.54 0.36 1134  
4.83 1.16 0.24 1046 4.69 1.13 0.24 1101 4.62 1.11 0.24 1134 4.48 1.08 0.24 1166  
4.11 3.13 0.76 872 3.94 2.99 0.76 916 3.78 2.87 0.76 959 3.64 2.77 0.76 1003  
4.29 2.74 0.64 916 4.11 2.63 0.64 970 3.99 2.55 0.64 992 3.85 2.46 0.64 1036  
4.46 2.32 0.52 948 4.31 2.24 0.52 1008 4.20 2.18 0.52 1036 4.03 2.09 0.52 1079  
4.69 1.88 0.40 992 4.52 1.81 0.40 1046 4.41 1.76 0.40 1079 4.27 1.71 0.40 1134  
4.83 1.35 0.28 1046 4.69 1.31 0.28 1101 4.62 1.29 0.28 1134 4.48 1.25 0.28 1166  
4.11 3.29 0.80 872 3.94 3.15 0.80 916 3.78 3.02 0.80 959 3.64 2.91 0.80 1003  
4.29 2.92 0.68 916 4.11 2.80 0.68 970 3.99 2.71 0.68 992 3.85 2.62 0.68 1036  
4.46 2.50 0.56 948 4.31 2.41 0.56 1008 4.20 2.35 0.56 1036 4.03 2.25 0.56 1079  
4.69 2.06 0.44 992 4.52 1.99 0.44 1046 4.41 1.94 0.44 1079 4.27 1.88 0.44 1134  
4.83 1.55 0.32 1046 4.69 1.50 0.32 1101 4.62 1.48 0.32 1134 4.48 1.43 0.32 1166  
4.11 3.45 0.84 872 3.94 3.31 0.84 916 3.78 3.18 0.84 959 3.64 3.06 0.84 1003  
4.29 3.09 0.72 916 4.11 2.96 0.72 970 3.99 2.87 0.72 992 3.85 2.77 0.72 1036  
4.46 2.68 0.60 948 4.31 2.58 0.60 1008 4.20 2.52 0.60 1036 4.03 2.42 0.60 1079  
4.69 2.25 0.48 992 4.52 2.17 0.48 1046 4.41 2.12 0.48 1079 4.27 2.05 0.48 1134  
4.83 1.74 0.36 1046 4.69 1.69 0.36 1101 4.62 1.66 0.36 1134 4.48 1.61 0.36 1166  
4.11 3.62 0.88 872 3.94 3.47 0.88 916 3.78 3.33 0.88 959 3.64 3.20 0.88 1003  
4.29 3.26 0.76 916 4.11 3.13 0.76 970 3.99 3.03 0.76 992 3.85 2.93 0.76 1036  
4.46 2.86 0.64 948 4.31 2.76 0.64 1008 4.20 2.69 0.64 1036 4.03 2.58 0.64 1079  
4.69 2.44 0.52 992 4.52 2.35 0.52 1046 4.41 2.29 0.52 1079 4.27 2.22 0.52 1134  
4.83 1.93 0.40 1046 4.69 1.88 0.40 1101 4.62 1.85 0.40 1134 4.48 1.79 0.40 1166  
4.11 3.78 0.92 872 3.94 3.62 0.92 916 3.78 3.48 0.92 959 3.64 3.35 0.92 1003  
4.29 3.43 0.80 916 4.11 3.29 0.80 970 3.99 3.19 0.80 992 3.85 3.08 0.80 1036  
4.46 3.03 0.68 948 4.31 2.93 0.68 1008 4.20 2.86 0.68 1036 4.03 2.74 0.68 1079  
4.69 2.63 0.56 992 4.52 2.53 0.56 1046 4.41 2.47 0.56 1079 4.27 2.39 0.56 1134  
4.83 2.13 0.44 1046 4.69 2.06 0.44 1101 4.62 2.03 0.44 1134 4.48 1.97 0.44 1166  
NOTE  
Q :Total capacity (kW)  
SHC :Sensible heat capacity (kW)  
SHF :Sensible heat factor  
INPUT :Total power input (W)  
DB :Dry-bulb temperature  
WB :Wet-bulb temperature  
19  
PERFORMANCE DATA  
COOL operation (230V)  
E1  
E1  
MSC-GA35VB -  
: MUH-GA35VB -  
CAPACITY : 3.5(kW) SHF : 0.66 INPUT : 1090(W)  
OUTDOOR DB(:)  
INDOOR INDOOR  
35  
40  
43  
DB(:) WB(:)  
Q
SHC SHF INPUT  
Q
SHC SHF INPUT  
Q
SHC SHF INPUT  
21  
21  
22  
22  
22  
23  
23  
23  
24  
24  
24  
24  
25  
25  
25  
25  
26  
26  
26  
26  
26  
27  
27  
27  
27  
27  
28  
28  
28  
28  
28  
29  
29  
29  
29  
29  
30  
30  
30  
30  
30  
31  
31  
31  
31  
31  
32  
32  
32  
32  
32  
NOTE  
18  
20  
18  
20  
22  
18  
20  
22  
18  
20  
22  
24  
18  
20  
22  
24  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
18  
20  
22  
24  
26  
3.43 1.65 0.48 1068 3.15 1.51 0.48 1134 3.03 1.45 0.48 1155  
3.61 1.30 0.36 1112 3.36 1.21 0.36 1166 3.24 1.17 0.36 1199  
3.43 1.78 0.52 1068 3.15 1.64 0.52 1134 3.03 1.57 0.52 1155  
3.61 1.44 0.40 1112 3.36 1.34 0.40 1166 3.24 1.30 0.40 1199  
3.82 1.07 0.28 1155 3.57 1.00 0.28 1221 3.45 0.97 0.28 1243  
3.43 1.92 0.56 1068 3.15 1.76 0.56 1134 3.03 1.70 0.56 1155  
3.61 1.59 0.44 1112 3.36 1.48 0.44 1166 3.24 1.42 0.44 1199  
3.82 1.22 0.32 1155 3.57 1.14 0.32 1221 3.45 1.10 0.32 1243  
3.43 2.06 0.60 1068 3.15 1.89 0.60 1134 3.03 1.82 0.60 1155  
3.61 1.73 0.48 1112 3.36 1.61 0.48 1166 3.24 1.55 0.48 1199  
3.82 1.37 0.36 1155 3.57 1.29 0.36 1221 3.45 1.24 0.36 1243  
4.03 0.97 0.24 1199 3.78 0.91 0.24 1254 3.68 0.88 0.24 1281  
3.43 2.20 0.64 1068 3.15 2.02 0.64 1134 3.03 1.94 0.64 1155  
3.61 1.87 0.52 1112 3.36 1.75 0.52 1166 3.24 1.68 0.52 1199  
3.82 1.53 0.40 1155 3.57 1.43 0.40 1221 3.45 1.38 0.40 1243  
4.03 1.13 0.28 1199 3.78 1.06 0.28 1254 3.68 1.03 0.28 1281  
3.43 2.33 0.68 1068 3.15 2.14 0.68 1134 3.03 2.06 0.68 1155  
3.61 2.02 0.56 1112 3.36 1.88 0.56 1166 3.24 1.81 0.56 1199  
3.82 1.68 0.44 1155 3.57 1.57 0.44 1221 3.45 1.52 0.44 1243  
4.03 1.29 0.32 1199 3.78 1.21 0.32 1254 3.68 1.18 0.32 1281  
4.24 0.85 0.20 1243 3.99 0.80 0.20 1297 3.87 0.77 0.20 1324  
3.43 2.47 0.72 1068 3.15 2.27 0.72 1134 3.03 2.18 0.72 1155  
3.61 2.16 0.60 1112 3.36 2.02 0.60 1166 3.24 1.94 0.60 1199  
3.82 1.83 0.48 1155 3.57 1.71 0.48 1221 3.45 1.65 0.48 1243  
4.03 1.45 0.36 1199 3.78 1.36 0.36 1254 3.68 1.32 0.36 1281  
4.24 1.02 0.24 1243 3.99 0.96 0.24 1297 3.87 0.93 0.24 1324  
3.43 2.61 0.76 1068 3.15 2.39 0.76 1134 3.03 2.30 0.76 1155  
3.61 2.31 0.64 1112 3.36 2.15 0.64 1166 3.24 2.07 0.64 1199  
3.82 1.98 0.52 1155 3.57 1.86 0.52 1221 3.45 1.79 0.52 1243  
4.03 1.61 0.40 1199 3.78 1.51 0.40 1254 3.68 1.47 0.40 1281  
4.24 1.19 0.28 1243 3.99 1.12 0.28 1297 3.87 1.08 0.28 1324  
3.43 2.74 0.80 1068 3.15 2.52 0.80 1134 3.03 2.42 0.80 1155  
3.61 2.45 0.68 1112 3.36 2.28 0.68 1166 3.24 2.20 0.68 1199  
3.82 2.14 0.56 1155 3.57 2.00 0.56 1221 3.45 1.93 0.56 1243  
4.03 1.77 0.44 1199 3.78 1.66 0.44 1254 3.68 1.62 0.44 1281  
4.24 1.36 0.32 1243 3.99 1.28 0.32 1297 3.87 1.24 0.32 1324  
3.43 2.88 0.84 1068 3.15 2.65 0.84 1134 3.03 2.54 0.84 1155  
3.61 2.60 0.72 1112 3.36 2.42 0.72 1166 3.24 2.33 0.72 1199  
3.82 2.29 0.60 1155 3.57 2.14 0.60 1221 3.45 2.07 0.60 1243  
4.03 1.93 0.48 1199 3.78 1.81 0.48 1254 3.68 1.76 0.48 1281  
4.24 1.52 0.36 1243 3.99 1.44 0.36 1297 3.87 1.39 0.36 1324  
3.43 3.02 0.88 1068 3.15 2.77 0.88 1134 3.03 2.66 0.88 1155  
3.61 2.74 0.76 1112 3.36 2.55 0.76 1166 3.24 2.46 0.76 1199  
3.82 2.44 0.64 1155 3.57 2.28 0.64 1221 3.45 2.21 0.64 1243  
4.03 2.09 0.52 1199 3.78 1.97 0.52 1254 3.68 1.91 0.52 1281  
4.24 1.69 0.40 1243 3.99 1.60 0.40 1297 3.87 1.55 0.40 1324  
3.43 3.16 0.92 1068 3.15 2.90 0.92 1134 3.03 2.79 0.92 1155  
3.61 2.88 0.80 1112 3.36 2.69 0.80 1166 3.24 2.59 0.80 1199  
3.82 2.59 0.68 1155 3.57 2.43 0.68 1221 3.45 2.34 0.68 1243  
4.03 2.25 0.56 1199 3.78 2.12 0.56 1254 3.68 2.06 0.56 1281  
4.24 1.86 0.44 1243 3.99 1.76 0.44 1297 3.87 1.70 0.44 1324  
Q :Total capacity (kW)  
SHC :Sensible heat capacity (kW)  
SHF :Sensible heat factor  
DB :Dry-bulb temperature  
WB :Wet-bulb temperature  
INPUT :Total power input (W)  
20  
PERFORMANCE DATA  
HEAT operation (230V)  
E1  
E1  
MSC-GA20VB -  
: MUH-GA20VB -  
CAPACITY : 2.5(kW)  
INPUT : 690(W)  
OUTDOOR WB(:)  
INDOOR  
DB(:)  
15  
-10  
INPUT  
1.58 449 1.90 538  
1.50 483 1.80 573  
1.35 518 1.68 607  
-5  
INPUT  
0
5
10  
INPUT  
2.88 697 3.18 718  
2.75 718 3.05 738  
2.63 752 2.93 773  
15  
INPUT  
20  
INPUT  
3.50 731  
3.36 766  
3.25 794  
Q
Q
Q
INPUT  
Q
INPUT  
Q
Q
Q
2.23 607 2.55 656  
2.13 635 2.43 683  
1.98 669 2.30 718  
21  
26  
E1  
E1  
MSC-GA25VB -  
: MUH-GA25VB -  
CAPACITY : 3.0(kW)  
INPUT : 820(W)  
OUTDOOR WB(:)  
INDOOR  
DB(:)  
15  
-10  
INPUT  
1.89 533 2.28 640  
1.80 574 2.16 681  
1.62 615 2.01 722  
-5  
INPUT  
0
5
10  
INPUT  
3.45 828 3.81 853  
3.30 853 3.66 877  
3.15 894 3.51 918  
15  
INPUT  
20  
INPUT  
4.20 869  
4.04 910  
3.90 943  
Q
Q
Q
INPUT  
Q
INPUT  
Q
Q
Q
2.67 722 3.06 779  
2.55 754 2.91 812  
2.37 795 2.76 853  
21  
26  
E1  
E1  
MSC-GA35VB -  
: MUH-GA35VB -  
INPUT : 1020(W)  
CAPACITY : 3.7(kW)  
OUTDOOR WB(:)  
INDOOR  
DB(:)  
15  
-10  
INPUT  
2.33 663 2.81 796  
2.22 714 2.66 847  
2.00 765 2.48 898  
-5  
INPUT  
0
5
10  
INPUT  
4.26 1030 4.70 1061 5.18 1081  
15  
INPUT  
20  
INPUT  
Q
Q
Q
INPUT  
3.29 898 3.77 969  
3.15 938 3.59 1010 4.07 1061 4.51 1091 4.98 1132  
2.92 989 3.40 1061 3.89 1112 4.33 1142 4.81 1173  
Q
INPUT  
Q
Q
Q
21  
26  
NOTE Q:Total capacity (kW) INPUT:Total power input (W) DB:Dry-bulb temperature WB:Wet-bulb temperature  
21  
9
SERVICE FUNCTIONS  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
E1  
E1  
9-1. COMPULSORY DEFROSTING MODE FOR SERVICE  
By short circuit of the connector JPDS and JPSG on the outdoor deicer P.C. board, defrosting mode can be accom-  
plished regardless of the defrost interval restriction. (Refer to 10-5.)  
Defrost thermistor RT61 must read below -3°C.  
9-2. CHANGE IN DEFROST SETTING  
<JRF> When the JRF wire of the deicer P.C. board is cut, the defrost interval time will be changed.  
<JRG> When the JRG wire of the deicer P.C. board is cut, the defrost temperature will be changed.(Refer to 10-5.)  
MODEL  
Jumper wire  
JRF  
Change point  
E1  
E1  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
Defrost interval time changes from 40 minutes to 15 minutes.  
JRG  
Deforst start temperature changes from -3: to 0:.  
10  
TROUBLESHOOTING  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
E1  
E1  
10-1. Cautions on troubleshooting  
1. Before troubleshooting, check the following:  
1) Check the power supply voltage.  
2) Check the indoor/outdoor connecting wire for mis-wiring.  
2. Take care the following during servicing.  
1) Before servicing the air conditioner, be sure to turn off the main unit first with the remote controller, and then after con-  
firming the horizontal vane is closed, turn off the breaker and/or disconnect the power plug.  
2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic  
control P.C. board.  
3) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the  
components.  
4) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.  
Housing point  
Lead wiring  
3. Troubleshooting procedure  
1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality.  
To make sure, check how many times the abnormality indication is flashing on and off before starting service work.  
2) If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the  
components for bursting and discoloration.  
3) When troubleshooting, refer to 10-2. “Instruction of troubleshooting”.  
22  
10-2. Instruction of troubleshooting  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
E1  
E1  
Start  
Indoor unit  
operates.  
Outdoor unit  
doesn't operate  
normally.  
OPERATION  
INDICATOR  
lamp on the  
indoor unit is  
flashing on  
and off.  
Indoor unit  
operates.  
Outdoor unit  
doesn't  
Indoor unit  
doesn't receive  
the signal from  
remote controller.  
operate.  
Indoor unit  
doesn't operate,  
when the  
EMERGENCY  
OPERATION  
switch is  
Outdoor unit  
operates in  
only Test Run  
operation.  
Outdoor unit  
doesn't  
operate  
even in  
Test Run  
operation.  
Outdoor unit  
doesn't  
stop even  
if indoor unit  
stops.  
Unit doesn't  
operate  
normal  
operation in  
COOL or  
HEAT mode.  
Indoor unit  
operates,  
when the  
EMERGENCY  
OPERATION  
switch is  
pressed.  
pressed.  
As for indoor unit  
MSC type,  
refer to service  
manual OB385  
or OB393.  
1. Check indoor /  
outdoor  
connecting wire.  
2. Refer to  
"Check of indoor  
electronic control  
P.C. board".  
Check room  
temperature  
thermistor.  
Refer to 10-5  
"Test point  
diagram and  
voltage".  
Refer to 10-4.  
C"Check of  
R.V. coil".  
Refer to  
"Check of  
remote  
controller  
and receiver  
P.C. board".  
Refer to 10-4.  
A"Check of  
outdoor unit".  
Refer to 10-4.  
B"Check of  
outdoor unit".  
Flash on and off at  
0.5-second intervals  
Cause:  
Indoor/Outdoor unit  
• Mis-wiring or  
trouble of serial  
signal  
2-time flash  
Cause:  
4-time flash  
Cause:  
Indoor unit  
• Trouble of  
indoor unit  
control  
3-time flash  
Cause:  
Indoor unit  
• Trouble of  
indoor fan  
motor  
6-time flash  
Cause:  
7-time flash  
Cause:  
Outdoor unit  
• Trouble of  
outdoor  
Indoor unit  
• Trouble of  
room temp-  
erature/  
indoor coil  
thermistor  
Outdoor unit  
• Trouble of  
thermistor  
in outdoor  
unit  
control  
system  
system  
Check room  
temperature  
thermistor  
and indoor  
coil thermis-  
tor.  
Refer to 10-5  
"Test point  
diagram and  
voltage".  
Replace the  
indoor  
electronic  
control  
Refer to  
"Check of  
indoor fan  
motor".  
Refer to 10-4. D  
"How to check  
mis-wiring and  
serial signal  
error (When  
outdoor unit  
doesn't work)".  
W1  
Refer to 10-4. Replace the  
E"Check of  
outdoor  
deicer  
P.C. board.  
thermistor".  
P.C. board.  
W1.<The case of the trouble of the serial signal>  
When the power is turned off and then turned on again, the indication shows “the trouble of mis-wiring”.  
23  
10-3. Trouble criterion of main parts  
E1  
E1  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
Figure  
Part name  
Check method and criterion  
Measure the resistance with a tester.  
(Part temperature –10°C ~ 40°C)  
Normal  
Defrost  
thermistor  
(RT63)  
Abnormal  
Open or short-circuit  
5k~ 60kΩ  
Compressor  
(MC)  
Measure the resistance between the terminals with a tester.  
(Coil wiring temperature –10°C ~ 40°C)  
WHT  
C
INNER  
P
PROTECTOR  
MUH-GA20/GA25VB  
150i 5°C OPEN  
90i10°C CLOSE  
MUH-GA35VB  
155i 5°C OPEN  
90i10°C CLOSE  
Normal  
AUX. MAIN  
Abnormal  
MUH-GA20VB  
MUH-GA35VB  
MUH-GA25VB  
2.99~3.67  
4.02~4.92Ω  
S
R
BLK  
RED  
C-R 3.41~4.18Ω  
2.46~3.01Ω  
Open or short-circuit  
C-S  
5.41~6.63Ω  
2.96~3.63Ω  
Measure the resistance between the terminals with a tester.  
(Coil wiring temperature –10°C ~ 40°C)  
Outdoor fan  
motor  
(MF)  
MAIN  
AUX.  
Normal  
Color of  
lead wire  
Abnormal  
MUH-GA20VB MUH-GA25/GA35VB  
FUSE  
INNER FUSE  
145i 2°C  
CUT OFF  
189 ~ 233 Ω  
WHT-BLK  
BLK-RED  
323 ~ 396 Ω  
Open or short-circuit  
241 ~ 296 Ω  
270 ~ 332 Ω  
BLK  
REDWHT  
P INNER PROTECTOR  
10-4. Troubleshooting flow  
Compressor and/or outdoor fan motor doesn’t operate.  
A
Check of outdoor unit  
Start  
Is the switch SW2-2 on the  
indoor electronic control  
P.C. board set to MUH type?  
Change the switch SW-2-2  
on the indoor electronic control  
P.C. board to MUH type.  
No  
Yes  
Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch.  
3-minute time delay works.  
Test run operation operates for 30 minutes.  
Compressor  
doesn't operate.  
Rectify the indoor and  
outdoor connecting wire.  
No  
No  
Is there 230V AC between 4 on the  
compressor contactor (52C) and  
TAB20 on the deicer P.C. board?  
Yes  
No  
+
Is there 5V DC between J205 –J101  
the deicer P.C. board?  
on  
Is there 230V AC between LN  
on the outdoor terminal block (TB1)?  
Yes  
Yes  
Replace the  
deicer P.C.  
board.  
Is there 230V AC between 3 on the  
compressor contactor (52C) and N  
on the outdoor terminal block (TB1)?  
Yes  
No  
Replace the  
deicer P.C. board.  
Rectify the connecting wire.  
Check the compressor and compressor  
capacitor, and rectify the connecting wire.  
Rectify the indoor and  
outdoor connecting wire.  
Outdoor fan motor  
doesn't operate.  
No  
Is there 230V AC between 4 on the  
compressor contactor (52C) and  
TAB 20 on the deicer P.C. board?  
Yes  
No  
No  
+
Is there 5V DC between J205 –J101 on  
the deicer P.C. board?  
Is there 230V AC between LN on  
the outdoor terminal block (TB1)?  
Yes  
Yes  
Check the outdoor fan motor  
and rectify the connecting  
wire.  
Replace the  
deicer P.C. board.  
Rectify the connecting wire.  
24  
Compressor and/or outdoor fan motor doesn’t stop.  
B
Check of outdoor unit  
Start  
Turn OFF the power supply.  
After 1 minute, turn ON  
power supply again.  
Is there 230V AC between 3 on the  
compressor contactor (52C) and N on the  
No  
No  
Does compressor stop?  
Rectify the connecting wire.  
outdoor terminal block (TB1)?  
Yes  
OK  
Yes  
Replace the  
deicer P.C. board.  
No  
Replace the  
deicer P.C. board.  
Does outdoor fan motor stop?  
Yes  
OK  
Unit operates COOL mode even if it is set to HEAT mode.  
w First, measure the resistance of R.V. coil to confirm it is disconnected or is not short-circuit.  
C
Check of R.V. coil  
Turn ON the power supply and operate  
the indoor unit in HEAT mode by pressing  
the EMERGENCY OPERATION switch.  
No  
After 3 minutes, does the unit  
OK  
operate in COOL mode?  
Yes  
Is there 230V AC between  
CN72112on the deicer P.C.  
board?  
No  
Replace the  
deicer P.C. board  
Yes  
Replace the R.V. coil.  
Unit operates HEAT mode even if it is set to COOL mode.  
w First, measure the resistance of R.V. coil to confirm it is disconnected or is not short-circuit.  
C
Check of R.V. coil  
Turn ON the power supply and operate  
the indoor unit in COOL mode by pressing  
the EMERGENCY OPERATION switch.  
Yes  
No  
After 3 minutes, does the unit  
operate in HEAT mode?  
Ok  
Yes  
Is there 230V AC between  
CN72112on the deicer  
P.C. board?  
No  
Replace the R.V. coil.  
Yes  
Replace the  
deicer P.C. board.  
25  
When OPERATION INDICATOR lamp flashes 0.5-second intervals or 1-time.  
Outdoor unit does not operate.  
D
How to check mis-wiring and serial signal error  
w1 Set the switch(SW2-2) on indoor electronic control P.C. board to  
MU or MUX type, when the outdoor unit is MU or MUX type.  
If the setting is MUH or MXZ type, the unit does not work.  
Start  
w2 Short circuit of JPG and JPS on the indoor electronic control  
P.C. board enables self-check to be displayed in 3 seconds.  
Turn OFF the power supply(indoor/outdoor unit).  
Set the switch(SW2-2) on the indoor electronic  
control P.C. board to MU or MUX type. w1  
No  
Is the outdoor unit "MUH" type?  
Yes  
•Turn ON the power supply(indoor/outdoor unit).  
•Press once EMERGENCY OPERATION switch.  
•3 min. later, check the self-check result  
displayed on OPERATION INDICATOR  
lamp on indoor unit. w 2  
Yes  
OK  
Does the unit operate?  
No  
Refer to the  
"Instruction of  
troubleshooting."  
Serial signal error is indicated.  
(0.5-sec. ON, 0.5-sec. OFF)  
Yes  
Is this mis-wiring, poor contact,  
Make them sure.  
or disconnection of wire?  
No  
1. Turn OFF the power supply(indoor/outdoor unit) and disconnect indoor and outdoor connecting wire on indoor side.  
2. Short-circuit between indoor terminal block N and 3.  
3. Turn ON the power supply(indoor unit) and press once EMERGENCY OPERATION switch.  
Is there 20V DC between both ends of  
No  
R132 on indoor electronic control P.C.  
board ?  
Replace the indoor electronic  
control P.C. board.  
( By tester, the stylus is between 0 ~ 20V. )  
Yes  
•Turn OFF the power supply(indoor unit).  
•Connect ON indoor and outdoor connecting wire.  
Turn ON the power supply(outdoor unit).  
Check the outdoor power supply,  
power supply cord and  
connection.  
No  
Is there 230V AC between outdoor terminal  
block L-N (TB1)?  
Yes  
No  
Is there 5V DC between J205 + –J101 - on the deicer P.C. board?  
Replace the deicer P.C. board.  
Yes  
Turn ON the power supply(indoor unit).  
During EMERGENCY OPERATION,  
is there 10V DC between both ends  
of R601?  
Make the wiring between CN730  
on the deicer P.C. board and  
outdoor terminal block correct.  
No  
(By tester, the stylus is between 5 ~10V)  
Yes  
Replace the deicer P.C. board.  
As for indoor unit MSC type, refer to service manual OB385 or OB393.  
26  
When OPERATION INDICATOR lamp flashes 6-time.  
Thermistors in the outdoor unit are abnormal.  
E
Check of outdoor thermistor  
Start  
Replace the deicer P.C.  
board.  
Defrost thermistor (RT61)  
Measure  
resistance  
between CN 661  
1and 2.  
Reconnect CN661.  
Turn ON the power  
supply and press  
the EMERGENCY  
OPERATION  
No  
Yes  
Turn OFF the  
power supply.  
Is the resistance of  
thermistor normal?  
Does the unit operate  
10 minutes or more?  
Yes  
No  
switch.  
OK ❈  
Replace the  
thermistor.  
Defective contact of the connector is considered.  
27  
10-5. Test point diagram and voltage  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
E1  
E1  
Outdoor deicer P.C. board  
CN711  
Outdoor fan motor  
230V AC  
CN721  
R.V. coil  
230V AC  
Power supply input  
230V AC  
NR61  
Varistor  
F61  
Fuse  
2A/250V  
R601  
5~10VDC  
+
--  
}
Defrost interval time  
short pin  
(JPDS, JPSG)  
(Refer to 9-1.)  
Jumper wire for  
change in  
defrost setting  
(JRF,JRG)  
(Refer to 9-2.)  
}
CN661 1-2  
Defrost thermistor RT61  
5V DC  
J205 +  
J101  
--  
12V DC  
J204  
J101  
+
--  
28  
11  
DISASSEMBLY INSTRUCTIONS  
<"Terminal with locking mechanism" Detaching points>  
The terminal which has the locking mechanism can be detached as shown below.  
There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism.  
The terminal without locking mechanism can be detached by pulling it out.  
Check the shape of the terminal before detaching.  
(1) Slide the sleeve and check if there is a locking lever or not.  
(2) The terminal with this connector has the locking  
mechanism.  
Sleeve  
1Slide the sleeve.  
2Pull the terminal while  
pushing the locking  
1Hold the sleeve, and  
pull out the terminal  
slowly.  
Locking lever  
lever.  
Connector  
E1  
E1  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
OUTDOOR UNIT  
OPERATING PROCEDURE  
PHOTOS  
1. Removing the cabinet  
Photo 1  
(1) Remove the screws of the top panel.  
(2) Remove the screw of the service panel.  
(3) Remove the screws of the cabinet.  
(4) Remove the screws of the front panel and motor support.  
(5) Remove the service panel, and remove the screw from  
the insides.  
Screw of the front panel and motor support  
(6) Remove the top panel.  
(7) Remove the cabinet.  
Photo 3  
Screws of the  
top panel  
Screws of the cabinet  
Photo 2  
Screws of the  
top panel  
Screw of the  
Service panel  
Screw of the cabinet  
Screws of the  
cabinet  
(W) This photo shows MUH-GA20VB.  
29  
OPERATING PROCEDURE  
PHOTOS  
2. Removing the deicer P.C. board  
Photo 4  
(1) Remove the service panel and the cabinet.  
(2) Disconnect all the connectors and the terminals on the  
deicer P.C. board.  
Screw of the  
relay panel  
Deicer  
P.C. board  
Relay panel  
(3) Remove the deicer P.C. board.  
Terminal  
block  
Surge absorber  
3. Removing the propeller and the outdoor fan motor  
(1) Remove the cabinet. (Refer to 1.)  
(2) Remove the propeller nut.  
Photo 5  
(3) Remove the propeller.  
NOTE : Loose the propeller in the rotating direction for  
removal.  
Terminal  
cover  
Screws of  
the relay  
panel  
When attaching the propeller, align the mark on the  
propeller and the motor shaft cut section.  
Set the propeller in position by using the cut on the  
shaft and the mark on the propeller.  
Screw of the  
outdoor fan motor  
Propeller  
(4) Disconnect the outdoor fan motor connector.  
(5) Remove screws fixing the fan motor.  
(6) Remove the outdoor fan motor.  
R.V. coil  
Propeller Sound proof felt  
nut  
(W) This photo shows MUH-GA20VB.  
30  
OPERATING PROCEDURE  
PHOTOS  
4. Removing the compressor  
Photo 6  
(1) Remove the cabinet. (Refer to 1.)  
Discharge pipe  
(2) Remove the relay panel.  
(3) Remove the soundproof felt.  
4-Way valve  
(4) Remove the terminal cover on the compressor.  
(5) Disconnect lead wires from the glass terminal of the com-  
pressor.  
(6) Recover gas from the refrigerant circuit.  
NOTE : Recover gas from the pipes until the pressure gauge  
shows 0 kg/cm2 (0 MPa).  
(7) Disconnect the welded part of the discharge pipe.  
(8) Disconnect the welded part of the suction pipe.  
(9) Remove nuts fixing the compressor.  
Glass  
terminal  
Suction  
pipe  
Compressor  
( )  
10 Remove the compressor.  
Compressor nuts  
31  
12  
PARTS LIST  
E1  
E1  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
12-1. OUTDOOR UNIT STRUCTURAL PARTS  
22  
20  
19  
21  
18  
17  
15  
14  
16  
1(W)  
2
24  
23  
3
13  
4
5
6
7
12  
8
10  
11  
9
(W) This figure shows MUH-GA20VB.  
32  
E1  
E1  
E1  
MUH-GA20VB -  
MUH-GA25VB -  
MUH-GA35VB -  
12-1. OUTDOOR UNIT STRUCTURAL PARTS  
Part numbers that are circled are not shown in the illustration.  
Q'ty/unit  
Symbol  
in Wiring  
Diagram  
MUH-GA20VB  
MUH-GA25VB  
MUH-GA35VB  
Remarks  
No.  
1
Part name  
Part No.  
E1  
-
E1  
-
E1  
-
1
E02 904 630  
E02 905 630  
E02 906 630  
OUTDOOR HEAT EXCHANGER  
OUTDOOR HEAT EXCHANGER  
OUTDOOR HEAT EXCHANGER  
1
1
1
1
1
1
E02 904 301 OUTDOOR FAN MOTOR  
E02 905 301 OUTDOOR FAN MOTOR  
E02 899 232 CABINET  
E02 903 232 CABINET  
E02 927 521 GRILLE  
RA6V21-  
RA6V33-  
MF  
MF  
2
3
1
1
1
1
1
1
1
1
1
4
5
E02 665 501 PROPELLER  
E02 899 290 BASE  
E02 905 290 BASE  
6
7
1
3
1
3
3
1
E02 075 506 COMPRESSSOR RUBBER SET  
E02 742 900 COMPRESSOR  
E02 753 900 COMPRESSOR  
E02 754 900 COMPRESSOR  
E02 904 661 STOP VALVE (GAS)  
E02 904 662 STOP VALVE (LIQUID)  
E02 901 233 BACK PANEL  
3RUBBERS/SET  
RN092VHSHT  
RN104VHSHT  
RN135VHSHT  
[9.52  
MC  
MC  
MC  
1
8
1
1
1
1
1
1
1
1
9
10  
[6.35  
11  
E02 927 233 BACK PANEL  
1
1
1
1
1
1
1
1
1
1
1
12  
13  
14  
15  
1
1
1
1
1
E02 927 245 SERVICE PANEL  
E02 838 704 DRAIN SOCKET  
E02 817 374 TERMINAL BLOCK  
E02 836 374 TERMINAL BLOCK  
E02 927 961 4-WAY VALVE  
3P  
2P  
TB1  
TB2  
16  
E02 931 961 4-WAY VALVE  
1
1
E02 742 353 COMPRESSOR CAPACITOR  
E02 665 353 COMPRESSOR CAPACITOR  
E02 900 353 COMPRESSOR CAPACITOR  
E02 895 383 SURGE ABSORBER  
E02 904 451 DEICER P.C. BOARD  
E02 905 451 DEICER P.C. BOARD  
E02 906 310 DEFROST THERMISTOR  
E02 899 523 CONDENSER NET  
E02 838 523 CONDENSER NET  
E02 927 297 TOP PANEL  
E02 899 293 SEPARATOR  
E02 899 515 MOTOR SUPPORT  
E02 904 490 R. V. COIL  
E02 906 490 R. V. COIL  
E02 095 382 FUSE  
20+ /440V AC  
25+ /440V AC  
30+ /440V AC  
C1  
C1  
C1  
1
1
17  
1
1
1
1
18  
19  
DSAR  
1
1
1
1
1
1
20  
21  
RT61  
1
1
1
1
1
1
1
1
1
1
1
1
1
22  
23  
24  
21S4  
21S4  
F61  
25  
1
1
1
1
1
1
1
1
1
1
1
1
250V 2A  
26  
27  
28  
29  
30  
31  
32  
33  
E02 820 385 VARISTOR  
NR61  
E02 891 642 CHECK VALVE  
E02 408 936 CAPILLARY TUBE  
E02 156 936 CAPILLARY TUBE  
E02 024 936 CAPILLARY TUBE  
E02 339 936 CAPILLARY TUBE  
E02 282 936 CAPILLARY TUBE  
[3.0O[1.4O700  
[3.0O[1.4O500  
[3.0O[1.4O1000  
[3.0O[1.4O600  
[3.0O[1.4O300  
1
1
1
1
33  
34  
35  
HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN  
C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD  
New publication, effective Feb. 2005  
Distributed in Feb. 2005. No.OB387 6  
Specifications subject to change without notice.  
Made in Japan  

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