Mitsubishi Electric MSC-A09YV Service manual

OB331-1.qxp
03.12.3 1:20 PM
Page 1
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
HFC
No. OB331
utilized
SERVICE MANUAL
R410A
Wireless type
Models
MUH-A07YV MUH-A09YV MUH-A12YV -
E1
E1
E1
CONTENTS
Indication of
model name
MUH-A07YV MUH-A09YV MUH-A12YV -
E1
E1
E1
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 ············································7
7. REFRIGERANT SYSTEM DIAGRAM ················8
8. PERFORMANCE CURVES ································9
9. MICROPROCESSOR CONTROL ····················20
10. SERVICE FUNCTIONS·····································22
11. TROUBLESHOOTING ······································22
12. DISASSEMBLY INSTRUCTIONS·····················29
13. PARTS LIST······················································32
NOTE:
•This manual describes technical data of outdoor units.
•As for indoor units MSC-A07/A09/A12YV - E1 , refer to the service manual OB329.
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Page 2
TECHNICAL CHANGES
MUH-A07WV- E1 ➔MUH-A07YV- E1
1. Outdoor heat exchanger has changed.
2. Outdoor fan motor has changed. (RA6V23-FB➔RC6V20-AB)
MUH-A09WV- E1 ➔MUH-A09YV- E1
MUH-A12WV- E1 ➔MUH-A12YV- E1
1. Outdoor heat exchanger has changed.
2. Outdoor fan motor has changed. (RA6V33-DB➔RA6V33-FB)
INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT
• This room air conditioner adopts an 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 R410A refrigerant 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.
New refrigerant
R410A
R22
Composition (Ratio)
HFC-32: HFC-125 (50%:50%)
R22 (100%)
Refrigerant handling
Pseudo-azeotropic refrigerant
Single refrigerant
Not included
Included
Refrigerant
Chlorine
A1/A1
A1
72.6
86.5
Boiling point (:)
-51.4
-40.8
Steam pressure [25:](Mpa)
1.557
0.94
Refrigerant
Safety group (ASHRAE)
Molecular weight
64
44.4
Non combustible
Non combustible
0
0.055
Saturated steam density [25:](Kg/K)
Combustibility
ODP w1
GWP w2
Refrigerant charge method
1730
1700
From liquid phase in cylinder
Gas phase
Possible
Possible
Kind
Incompatible oil
Compatible oil
Color
Non
Light yellow
Non
Non
oil
Refrigerating
Additional charge on leakage
Smell
w1 :Ozone Destruction Parameter : based on CFC-11
w2 :Global Warmth Parameter
: based on CO2
New Specification
Compressor
Previous refrigerant
Current Specification
The incompatible refrigerating oil easily separates from
Since refrigerant and refrigerating oil are compatible each,
refrigerant and is in the upper layer inside the suction muffler. refrigerating oil backs to the compressor through the lower
Raising position of the oil back hole enables to back the
position oil back hole.
refrigerating oil of the upper layer to flow back to the
compressor.
Suction muffler
Suction muffler
Compressor
Oil back hole
Refrigerating oil
Refrigerant
Compressor
Oil back hole
Refrigerating oil /Refrigerant
NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).
f [Gauge])
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/f
2
03.12.3 1:20 PM
Page 3
Conversion chart of refrigerant temperature and pressure
(MPa [Gauge])
4.0
3.5
Saturated liquid pressure
OB331-1.qxp
R410A
3.0
R22
2.5
2.0
NOTE : The unit of pressure has been changed to MPa on the
international system of units(SI unit system).
1.5
1.0
f [Gauge])
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/f
0.5
0.0
-0.5
-30 -20 -10
0
10
20
30
40
50
60
(:)
1.Tools dedicated for the air conditioner with R410A refrigerant
The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.
The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being
charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.
R410A tools
Description
Can R22 tools be used?
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
No
Charge hose
No
Gas leak detector
No
Hose material and cap size have been changed to improve the pressure
resistance.
Dedicated for HFC refrigerant.
Yes
6.35 mm and 9.52 mm
No
12.7 mm
Flare tool
Yes
Clamp bar hole has been enlarged to reinforce the spring strength in the tool.
Flare gauge
Vacuum pump
adapter
Electronic scale for
refrigerant charging
New
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
Torque wrench
New
New
No : Not Substitutable for R410A
Yes : Substitutable for R410A
2.Refrigerant piping
1 Specifications
Use the refrigerant pipes that meet the following specifications.
Pipe
For liquid
For gas
Outside diameter
mm
Wall
thickness
6.35
0.8 mm
9.52
0.8 mm
12.7
0.8 mm
Insulation material
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.
3
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Page 4
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”.
Dimension of flare nut
Pipe diameter
mm
R410A
R22
6.35
17
17
9.52
22
22
12.7
26
24
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 refrigerating 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
4
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2
Page 5
PART NAMES AND FUNCTIONS
OUTDOOR UNIT
ACCESSORIES
MUH-A07YV- E1
MUH-A09YV- E1
MUH-A12YV- E1
MUH-A07YV - E1
MUH-A09YV - E1
MUH-A12YV - E1
<Outdoor unit: MUH type>
Air inlet
(back and side)
Piping
1 Drain socket
1
2 Drain cap
2
Drain hose
Air outlet
Drain outlet
3
SPECIFICATION
Outdoor model
Outdoor unit power supply
Fan
Compressor
motor
Electrical
data
Capacity
Capacity
kW
Dehumidification
R/h
Outdoor air flow
K /h
Power outlet
A
Running current
A
Power input
W
Auxiliary heater
A(kW)
Power factor
%
Starting current
A
Compressor motor current
A
Fan motor current
A
Coefficient of performance (C.O.P)
Model
Output
W
Winding
"
resistance (at 20:)
Model
Winding
"
resistance (at 20:)
Dimensions WOHOD
mm
Weight
kg
Sound level
dB
Fan speed
rpm
Fan speed regulator
Refrigerant filling
kg
capacity (R410A)
Refrigerating oil (Model)
cc
Thermistor RT61 (at 0:)
k"
Special
remarks
OB331-1.qxp
MUH-A07YV - E1
Single phase
230V,50Hz
2.3
2.5
0.9
—
1,686
10
3.00
2.86
680
655
—
98
99
23
2.78
2.64
0.22
3.22
3.62
RN092VHSHT
600
C-R 3.87
C-S 6.14
RC6V20-AB
WHT-BLK 410
BLK-RED 433
780o540o255
35
47
735
1
MUH-A09YV - E1
Single phase
230V,50Hz
2.55
3.05
1.1
—
1,710
10
3.32
3.52
760
805
—
99
99
24
3.01
3.21
0.31
3.21
3.69
RN104VHSHT
700
C-R 3.40
C-S 4.56
RA6V33-FB
WHT-BLK 223
BLK-RED 228
780o540o255
38
49
825
1
MUH-A12YV - E1
Single phase
230V,50Hz
3.5
3.9
1.7
—
1,710
10
4.65
4.60
1,050
1,040
—
98
98
29
4.34
4.29
0.31
3.21
3.61
RN135VHSHT
900
C-R 2.79
C-S 3.36
RA6V33-FB
WHT-BLK 223
BLK-RED 228
780o540o255
40
49
825
1
0.62
1.00
1.00
350 (NEO22)
33.18
350 (NEO22)
33.18
620 (NEO22)
33.18
NOTE: Test conditions are based on ISO 5151.
Cooling : Indoor DB27°C WB19°C
Outdoor DB35°C WB24°C
Indoor-Outdoor piping length 5m
Heating : Indoor
Outdoor
5
DB20°C
DB 7°C/WB 6°C
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Page 6
NOISE CRITERIA CURVES
4
MUH-A07YV-
E1
FUNCTION
SPL(dB(A))
MUH-A09YVMUH-A12YV-
LINE
COOL
HEAT
Test conditions,
Cooling :DB35:
Heating :DB 7:
90
FUNCTION
COOL
E1
SPL(dB(A))
LINE
49
HEAT
Test conditions,
Cooling :DB35:
Heating :DB 7:
WB24:
WB 6:
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
E1
WB24:
WB 6:
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
47
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
NC-20
10
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-20
10
63
125
250
500
1000
2000
4000
8000
63
BAND CENTER FREQUENCIES, Hz
125
250
500
1000
2000
BAND CENTER FREQUENCIES, Hz
OUTDOORUNIT
1m
MICROPHONE
6
4000
8000
03.12.3 1:20 PM
5
Page 7
OUTLINES AND DIMENSIONS
OUTDOOR UNIT
MUH-A09YV - E1
MUH-A12YV - E1
Unit: mm
100mm or more
MUH-A07YV - E1
REQUIRED SPACE
Air in
32
320
ore
1
100
mm
or m
ore
255
285
320
109
or m
m
00m
Air in
Drainage
3holes [33
147
110
Air out
25
ore
rm
mo
m
400
35
0m
Service panel
m
mo
43- 35-
540
155
90
260
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [9.52 (MUH-A07/A09YV)
[12.7 (MUH-A12YV)
104
74
WIRING DIAGRAM
MODELS WIRING DIAGRAM
MUH-A07YV - E1
MUH-A09YV - E1
MUH-A12YV - E1
POWER SUPPLY
~/N
BLK
TB1
L
BRN
N
BRN
CN661
T61
BLU
C65
52C
PE
GRN/YLW
4
BLU
3
C1
DEICER P.C.BOARD
C
WHT
RED
BLK
NAME
SYMBOL
C1
COMPRESSOR CAPACITOR
C65
OUTDOOR FAN CAPACITOR
CN711
1 WHT
2 BLK
3 RED
SR61
TAB20
230V 50Hz
CN721
SR62
N
1
2
3
NR61
CIRCUIT BREAKER
MF
RED
CN730
TB2
3
TO
INDOOR UNIT
CONNECTING
12V
F61
OUTDOOR UNIT
21S4
RT61
DSAR
6
40
122
500
780
or
re
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) [6.35
10
OB331-1.qxp
SYMBOL
MF
NAME
S
MC
SYMBOL
R
NAME
TRANS FORMER
T61
OUTDOOR FAN MOTOR
(INNER FUSE/INNER PROTECTOR) TB1,TB2 TERMINAL BLOCK
SURGE ABSORBER
NR61
VARISTOR
21S4
R.V. COIL
F61
FUSE(2A)
RT61
DEFROST THERMISTOR
52C
COMPRESSOR CONTACTOR
MC
COMPRESSOR(INNER PROTECTOR) SR61,SR62 SOLID STATE RELAY
DSAR
NOTE:1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.
2. Use copper conductors only. (For field wiring)
3. Symbols below indicate.
/: Terminal block,
: Connector
7
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Page 8
REFRIGERANT SYSTEM DIAGRAM
MUH-A07YV - E1
MUH-A09YV - E1
OUTDOOR UNIT
Unit:mm
Refrigerant pipe [ 9.52
(with heat insulator)
Flared connection
4-way valve
Defrost
thermistor
RT61
Stop valve
(with service
port)
Muffler
Compressor
Capillary tube
[3.0x[1.4x500(MUH-A07YV)
[3.0x[1.4x600(MUH-A09YV)
Check valve
Flared connection
Strainer
#100
Outdoor
heat
exchanger
Capillary tube
[3.0x[1.4x800(2 pcs)
(MUH-A07YV)
[3.0x[1.4x500(2 pcs)
(MUH-A09YV)
R.V. coil
heating ON
cooling OFF
Capillary tube
[3.0x[1.4x600(MUH-A07YV)
[3.0x[1.4x1000(MUH-A09YV)
Refrigerant flow in cooling
Stop valve
Refrigerant pipe [6.35
(with heat insulator)
Refrigerant flow in heating
MUH-A12YV - E1
OUTDOOR UNIT
Unit:mm
Refrigerant pipe [12.7
(with heat insulator)
4-way valve
Stop valve
(with service port)
Flared connection
Muffler
Defrost
thermistor
RT61
Outdoor
heat
exchanger
Capillary tube
[3.0x[1.4x500(2pcs)
Compressor
Capillary tube
[3.0x[1.6x600
Flared connection
Strainer
#100
Capillary tube
[3.0x[1.6x1050
R.V. coil
heating ON
cooling OFF
Stop valve
Refrigerant flow in cooling
Refrigerant pipe [6.35
(with heat insulator)
Check
valve
8
Refrigerant flow in heating
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Page 9
MAX. REFRIGERANT PIPING LENGTH
Refrigerant piping
Piping size O.D : mm
Max. length : m
Model
MUH-A07YV -
E1
MUH-A09YV -
E1
A
Gas
20
9.52
Length of connecting pipe : m
Liquid
Indoor unit
Outdoor unit
Gas 0.43
Gas 0
Liquid 0.5
Liquid 0
6.35
MUH-A12YV -
12.7
25
E1
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
MUH-A07YV -
E1
MUH-A09YV -
E1
MUH-A12YV -
E1
7m
10m
15m
20m
0
60
160
260
25m
620
1000
360
Calculation : Xg=20g/m 5 x(A-7)m
8
PERFORMANCE CURVES
MUH-A07YV - E1
MUH-A09YV - E1
MUH-A12YV - E1
The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions,
since operating conditions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.
(1) GUARANTEED VOLTAGE
198~264V
(2) AIR FLOW
Air flow should be set at MAX.
(3) MAIN READINGS
}
(1) Indoor intake air wet-bulb temperature :
°CWB
(2) Indoor outlet air wet-bulb temperature :
°CWB
Cooling
(3) Outdoor intake air dry-bulb temperature :
°CDB
(4) Total input:
W
(5) Indoor intake air dry-bulb temperature :
°CDB
Heating
(6) Outdoor intake air wet-bulb temperature :
°CWB
(7) Total input :
W
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.
}
9
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Page 10
How to measure the indoor air wet-bulb/dry-bulb temperature difference
1.
2.
3.
4.
5.
6.
7.
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.
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.
Check that the air filter is cleaned.
Open windows and doors of room.
Press the EMERGENCY OPERATION switch once(twice) to start the EMERGENCY COOL
(HEAT) MODE.
When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.
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
7.1
8.0 9.1
6.4
7.2 8.2
5.8
6.5 7.4
5.1
5.7 6.5
MSC-A12YV - E1
MUH-A12YV - E1
8.8 10.0
MSC-A09YV - E1
MUH-A09YV - E1
9.6 11.0
7.8
MSC-A07YV - E1
MUH-A07YV - E1
8.5
18.8 23.3
16.3
17.2 21.4
14.8
15.7 19.4
13.3
14.1 17.5
11.8
12.5 15.5
10.4
11.0 13.6
8.9
9.4 11.7
MSC-A12YV - E1
MUH-A12YV - E1
17.8
MSC-A09YV - E1
MUH-A09YV - E1
20.4 25.2
MSC-A07YV - E1
MUH-A07YV - E1
19.2
NOTE:The above curves are for the heating operation without any frost.
10
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Page 11
8-2.OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT
COOL operation
Dry-bulb temperature
Relative humidity(%)
20
50
25
60
30
70
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).
f[Gauge] )
The conversion factor is : 1(MPa[Gauge]) =10.2(kgf/f
13
1.3
12
1.2
MUH-A07YV - E1
230V
11
1.1
10
1.0
9
0.9
8
0.8
7
0.7
15
18 20
50
25
60
30 32
70(%)
230V
3
2
1
15
35(:)
MUH-A09YV - E1
12
1.2
11
1.1
10
1.0
9
0.9
8
0.8
7
0.7
15
Outdoor unit current (A)
13
230V
18 20
50
25
60
30 32
70(%)
2
MUH-A12YV - E1
230V
11
1.1
10
1.0
9
0.9
8
0.8
7
0.7
15
18 20
50
25
60
25
60
30 32
70(%)
35(:)
MUH-A12YV - E1
5
1.2
18 20
50
Ambient temperature(˚C)
Ambient humidity(%)
1.3
12
35(:)
3
1
15
35(:)
Outdoor unit current (A)
13
30 32
70(%)
230V
Ambient temperature(˚C)
Ambient humidity(%)
(kgf/F[Gauge])(MPa[Gauge])
25
60
MUH-A09YV - E1
4
1.3
18 20
50
Ambient temperature(˚C)
Ambient humidity(%)
Ambient temperature(˚C)
Ambient humidity(%)
(kgf/F[Gauge])(MPa[Gauge])
MUH-A07YV - E1
4
Outdoor unit current (A)
Outdoor low pressure
(kgf/F[Gauge])(MPa[Gauge])
Outdoor low pressure
➁
③
Both indoor and outdoor unit are under the same temperature/humidity condition.
Outdoor low pressure
①
30 32
70(%)
35(:)
230V
4
3
2
15
18 20
50
25
60
30 32
70(%)
Ambient temperature(˚C)
Ambient humidity(%)
Ambient temperature(˚C)
Ambient humidity(%)
11
35(:)
OB331-1.qxp
03.12.3 1:20 PM
Page 12
HEAT operation
Outdoor:Dry bulb temperature 7,15,20°C
Wet bulb temperature 6,12,14.5°C
Condition indoor:Dry bulb temperature 20.0°C
Wet bulb temperature 14.5°C
MUH-A07YV - E1
Outdoor unit current (A)
Outdoor unit current (A)
4
230V
3
2
5
7
10
15
20 21
25 (:)
Ambient temperature(˚C)
Outdoor unit current (A)
6
MUH-A12YV - E1
5
4
7
10
15
20 21
230V
4
3
2
5
7
10
15
20 21
Ambient temperature(˚C)
230V
3
5
MUH-A09YV - E1
5
5
25 (:)
Ambient temperature(˚C)
12
25 (:)
OB331-1.qxp
03.12.3 1:20 PM
Page 13
PERFORMANCE DATA
COOL operation (230V)
MSC-A07YV - E1 : MUH-A07YV - E1
CAPACITY : 2.3(KW) SHF : 0.74
INPUT : 715(W)
21
INDOOR INDOOR
DB(:) WB(:) Q SHC SHF INPUT
21
18
2.70 1.51 0.56 572
21
20
2.82 1.24 0.44 601
22
18
2.70 1.62 0.60 572
22
20
2.82 1.35 0.48 601
22
22
2.93 1.06 0.36 622
23
18
2.70 1.73 0.64 572
23
20
2.82 1.47 0.52 601
23
22
2.93 1.17 0.40 622
24
18
2.70 1.84 0.68 572
24
20
2.82 1.58 0.56 601
24
22
2.93 1.29 0.44 622
24
24
3.08 0.99 0.32 651
25
18
2.70 1.95 0.72 572
25
20
2.82 1.69 0.60 601
25
22
2.93 1.41 0.48 622
25
24
3.08 1.11 0.36 651
26
18
2.70 2.05 0.76 572
26
20
2.82 1.80 0.64 601
26
22
2.93 1.52 0.52 622
26
24
3.08 1.23 0.40 651
26
26
3.17 0.89 0.28 686
27
18
2.70 2.16 0.80 572
27
20
2.82 1.92 0.68 601
27
22
2.93 1.64 0.56 622
27
24
3.08 1.36 0.44 651
27
26
3.17 1.02 0.32 686
28
18
2.70 2.27 0.84 572
28
20
2.82 2.03 0.72 601
28
22
2.93 1.76 0.60 622
28
24
3.08 1.48 0.48 651
28
26
3.17 1.14 0.36 686
29
18
2.70 2.38 0.88 572
29
20
2.82 2.14 0.76 601
29
22
2.93 1.88 0.64 622
29
24
3.08 1.60 0.52 651
29
26
3.17 1.27 0.40 686
30
18
2.70 2.49 0.92 572
30
20
2.82 2.25 0.80 601
30
22
2.93 1.99 0.68 622
30
24
3.08 1.73 0.56 651
30
26
3.17 1.40 0.44 686
31
18
2.70 2.59 0.96 572
31
20
2.82 2.37 0.84 601
31
22
2.93 2.11 0.72 622
31
24
3.08 1.85 0.60 651
31
26
3.17 1.52 0.48 686
32
18
2.70 2.70 1.00 572
32
20
2.82 2.48 0.88 601
32
22
2.93 2.23 0.76 622
32
24
3.08 1.97 0.64 651
32
26
3.17 1.65 0.52 686
NOTE
Q :Total capacity (kW)
SHC :Sensible heat capacity (kW)
OUTDOOR DB(:)
25
27
30
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT
2.59 1.45 0.56 601 2.48 1.39 0.56 629 2.39 1.34 0.56 658
2.70 1.19 0.44 636 2.62 1.15 0.44 651 2.53 1.11 0.44 679
2.59 1.55 0.60 601 2.48 1.49 0.60 629 2.39 1.44 0.60 658
2.70 1.30 0.48 636 2.62 1.26 0.48 651 2.53 1.21 0.48 679
2.83 1.02 0.36 661 2.76 0.99 0.36 679 2.65 0.95 0.36 708
2.59 1.66 0.64 601 2.48 1.59 0.64 629 2.39 1.53 0.64 658
2.70 1.41 0.52 636 2.62 1.36 0.52 651 2.53 1.32 0.52 679
2.83 1.13 0.40 661 2.76 1.10 0.40 679 2.65 1.06 0.40 708
2.59 1.76 0.68 601 2.48 1.69 0.68 629 2.39 1.63 0.68 658
2.70 1.51 0.56 636 2.62 1.47 0.56 651 2.53 1.42 0.56 679
2.83 1.24 0.44 661 2.76 1.21 0.44 679 2.65 1.16 0.44 708
2.97 0.95 0.32 686 2.90 0.93 0.32 708 2.81 0.90 0.32 744
2.59 1.86 0.72 601 2.48 1.79 0.72 629 2.39 1.72 0.72 658
2.70 1.62 0.60 636 2.62 1.57 0.60 651 2.53 1.52 0.60 679
2.83 1.36 0.48 661 2.76 1.32 0.48 679 2.65 1.27 0.48 708
2.97 1.07 0.36 686 2.90 1.04 0.36 708 2.81 1.01 0.36 744
2.59 1.97 0.76 601 2.48 1.89 0.76 629 2.39 1.82 0.76 658
2.70 1.73 0.64 636 2.62 1.68 0.64 651 2.53 1.62 0.64 679
2.83 1.47 0.52 661 2.76 1.44 0.52 679 2.65 1.38 0.52 708
2.97 1.19 0.40 686 2.90 1.16 0.40 708 2.81 1.12 0.40 744
3.08 0.86 0.28 722 3.04 0.85 0.28 744 2.94 0.82 0.28 765
2.59 2.07 0.80 601 2.48 1.99 0.80 629 2.39 1.91 0.80 658
2.70 1.84 0.68 636 2.62 1.78 0.68 651 2.53 1.72 0.68 679
2.83 1.58 0.56 661 2.76 1.55 0.56 679 2.65 1.48 0.56 708
2.97 1.31 0.44 686 2.90 1.28 0.44 708 2.81 1.23 0.44 744
3.08 0.99 0.32 722 3.04 0.97 0.32 744 2.94 0.94 0.32 765
2.59 2.17 0.84 601 2.48 2.09 0.84 629 2.39 2.01 0.84 658
2.70 1.95 0.72 636 2.62 1.89 0.72 651 2.53 1.82 0.72 679
2.83 1.70 0.60 661 2.76 1.66 0.60 679 2.65 1.59 0.60 708
2.97 1.42 0.48 686 2.90 1.39 0.48 708 2.81 1.35 0.48 744
3.08 1.11 0.36 722 3.04 1.09 0.36 744 2.94 1.06 0.36 765
2.59 2.28 0.88 601 2.48 2.19 0.88 629 2.39 2.10 0.88 658
2.70 2.05 0.76 636 2.62 1.99 0.76 651 2.53 1.92 0.76 679
2.83 1.81 0.64 661 2.76 1.77 0.64 679 2.65 1.69 0.64 708
2.97 1.54 0.52 686 2.90 1.51 0.52 708 2.81 1.46 0.52 744
3.08 1.23 0.40 722 3.04 1.21 0.40 744 2.94 1.18 0.40 765
2.59 2.38 0.92 601 2.48 2.29 0.92 629 2.39 2.20 0.92 658
2.70 2.16 0.80 636 2.62 2.10 0.80 651 2.53 2.02 0.80 679
2.83 1.92 0.68 661 2.76 1.88 0.68 679 2.65 1.80 0.68 708
2.97 1.66 0.56 686 2.90 1.62 0.56 708 2.81 1.57 0.56 744
3.08 1.36 0.44 722 3.04 1.34 0.44 744 2.94 1.30 0.44 765
2.59 2.48 0.96 601 2.48 2.38 0.96 629 2.39 2.30 0.96 658
2.70 2.27 0.84 636 2.62 2.20 0.84 651 2.53 2.13 0.84 679
2.83 2.04 0.72 661 2.76 1.99 0.72 679 2.65 1.90 0.72 708
2.97 1.78 0.60 686 2.90 1.74 0.60 708 2.81 1.68 0.60 744
3.08 1.48 0.48 722 3.04 1.46 0.48 744 2.94 1.41 0.48 765
2.59 2.59 1.00 601 2.48 2.48 1.00 629 2.39 2.39 1.00 658
2.70 2.38 0.88 636 2.62 2.31 0.88 651 2.53 2.23 0.88 679
2.83 2.15 0.76 661 2.76 2.10 0.76 679 2.65 2.01 0.76 708
2.97 1.90 0.64 686 2.90 1.85 0.64 708 2.81 1.80 0.64 744
3.08 1.60 0.52 722 3.04 1.58 0.52 744 2.94 1.53 0.52 765
SHF :Sensible heat factor
DB :Dry-bulb temperature
INPUT :Total power input (W)
WB :Wet-bulb temperature
13
OB331-1.qxp
03.12.3 1:20 PM
Page 14
PERFORMANCE DATA
COOL operation (230V)
MSC-A07YV - E1 : MUH-A07YV - E1
CAPACITY : 2.3(KW) SHF : 0.74
INPUT : 715(W)
OUTDOOR DB(:)
35
40
INDOOR INDOOR
DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q
21
18
2.25 1.26 0.56 701 2.07 1.16 0.56 744 1.99
21
20
2.37 1.04 0.44 729 2.21 0.97 0.44 765 2.13
22
18
2.25 1.35 0.60 701 2.07 1.24 0.60 744 1.99
22
20
2.37 1.14 0.48 729 2.21 1.06 0.48 765 2.13
22
22
2.51 0.90 0.36 758 2.35 0.84 0.36 801 2.27
23
18
2.25 1.44 0.64 701 2.07 1.32 0.64 744 1.99
23
20
2.37 1.23 0.52 729 2.21 1.15 0.52 765 2.13
23
22
2.51 1.00 0.40 758 2.35 0.94 0.40 801 2.27
24
18
2.25 1.53 0.68 701 2.07 1.41 0.68 744 1.99
24
20
2.37 1.33 0.56 729 2.21 1.24 0.56 765 2.13
24
22
2.51 1.10 0.44 758 2.35 1.03 0.44 801 2.27
24
24
2.65 0.85 0.32 787 2.48 0.79 0.32 822 2.42
25
18
2.25 1.62 0.72 701 2.07 1.49 0.72 744 1.99
25
20
2.37 1.42 0.60 729 2.21 1.32 0.60 765 2.13
25
22
2.51 1.20 0.48 758 2.35 1.13 0.48 801 2.27
25
24
2.65 0.95 0.36 787 2.48 0.89 0.36 822 2.42
26
18
2.25 1.71 0.76 701 2.07 1.57 0.76 744 1.99
26
20
2.37 1.52 0.64 729 2.21 1.41 0.64 765 2.13
26
22
2.51 1.30 0.52 758 2.35 1.22 0.52 801 2.27
26
24
2.65 1.06 0.40 787 2.48 0.99 0.40 822 2.42
26
26
2.78 0.78 0.28 815 2.62 0.73 0.28 851 2.54
27
18
2.25 1.80 0.80 701 2.07 1.66 0.80 744 1.99
27
20
2.37 1.61 0.68 729 2.21 1.50 0.68 765 2.13
27
22
2.51 1.40 0.56 758 2.35 1.31 0.56 801 2.27
27
24
2.65 1.16 0.44 787 2.48 1.09 0.44 822 2.42
27
26
2.78 0.89 0.32 815 2.62 0.84 0.32 851 2.54
28
18
2.25 1.89 0.84 701 2.07 1.74 0.84 744 1.99
28
20
2.37 1.71 0.72 729 2.21 1.59 0.72 765 2.13
28
22
2.51 1.50 0.60 758 2.35 1.41 0.60 801 2.27
28
24
2.65 1.27 0.48 787 2.48 1.19 0.48 822 2.42
28
26
2.78 1.00 0.36 815 2.62 0.94 0.36 851 2.54
29
18
2.25 1.98 0.88 701 2.07 1.82 0.88 744 1.99
29
20
2.37 1.80 0.76 729 2.21 1.68 0.76 765 2.13
29
22
2.51 1.60 0.64 758 2.35 1.50 0.64 801 2.27
29
24
2.65 1.38 0.52 787 2.48 1.29 0.52 822 2.42
29
26
2.78 1.11 0.40 815 2.62 1.05 0.40 851 2.54
30
18
2.25 2.07 0.92 701 2.07 1.90 0.92 744 1.99
30
20
2.37 1.90 0.80 729 2.21 1.77 0.80 765 2.13
30
22
2.51 1.70 0.68 758 2.35 1.60 0.68 801 2.27
30
24
2.65 1.48 0.56 787 2.48 1.39 0.56 822 2.42
30
26
2.78 1.22 0.44 815 2.62 1.15 0.44 851 2.54
31
18
2.25 2.16 0.96 701 2.07 1.99 0.96 744 1.99
31
20
2.37 1.99 0.84 729 2.21 1.85 0.84 765 2.13
31
22
2.51 1.81 0.72 758 2.35 1.69 0.72 801 2.27
31
24
2.65 1.59 0.60 787 2.48 1.49 0.60 822 2.42
31
26
2.78 1.34 0.48 815 2.62 1.26 0.48 851 2.54
32
18
2.25 2.25 1.00 701 2.07 2.07 1.00 744 1.99
32
20
2.37 2.08 0.88 729 2.21 1.94 0.88 765 2.13
32
22
2.51 1.91 0.76 758 2.35 1.78 0.76 801 2.27
32
24
2.65 1.69 0.64 787 2.48 1.59 0.64 822 2.42
32
26
2.78 1.45 0.52 815 2.62 1.36 0.52 851 2.54
NOTE
Q :Total capacity (kW)
SHF :Sensible heat factor
SHC :Sensible heat capacity (kW)
INPUT :Total power input (W)
14
43
SHC SHF INPUT
1.11 0.56 758
0.94 0.44 787
1.19 0.60 758
1.02 0.48 787
0.82 0.36 815
1.27 0.64 758
1.11 0.52 787
0.91 0.40 815
1.35 0.68 758
1.19 0.56 787
1.00 0.44 815
0.77 0.32 840
1.43 0.72 758
1.28 0.60 787
1.09 0.48 815
0.87 0.36 840
1.51 0.76 758
1.36 0.64 787
1.18 0.52 815
0.97 0.40 840
0.71 0.28 869
1.59 0.80 758
1.45 0.68 787
1.27 0.56 815
1.06 0.44 840
0.81 0.32 869
1.67 0.84 758
1.53 0.72 787
1.36 0.60 815
1.16 0.48 840
0.91 0.36 869
1.75 0.88 758
1.62 0.76 787
1.45 0.64 815
1.26 0.52 840
1.02 0.40 869
1.83 0.92 758
1.70 0.80 787
1.54 0.68 815
1.35 0.56 840
1.12 0.44 869
1.91 0.96 758
1.79 0.84 787
1.63 0.72 815
1.45 0.60 840
1.22 0.48 869
1.99 1.00 758
1.87 0.88 787
1.72 0.76 815
1.55 0.64 840
1.32 0.52 869
DB :Dry-bulb temperature
WB :Wet-bulb temperature
OB331-1.qxp
03.12.3 1:20 PM
Page 15
PERFORMANCE DATA
COOL operation (230V)
MSC-A09YV - E1 : MUH-A09YV - E1
CAPACITY : 2.55(KW) SHF : 0.70
INPUT : 795(W)
21
INDOOR INDOOR
DB(:) WB(:) Q SHC SHF INPUT
21
18
3.00 1.56 0.52 636
21
20
3.12 1.25 0.40 668
22
18
3.00 1.68 0.56 636
22
20
3.12 1.37 0.44 668
22
22
3.25 1.04 0.32 692
23
18
3.00 1.80 0.60 636
23
20
3.12 1.50 0.48 668
23
22
3.25 1.17 0.36 692
24
18
3.00 1.92 0.64 636
24
20
3.12 1.62 0.52 668
24
22
3.25 1.30 0.40 692
24
24
3.42 0.96 0.28 723
25
18
3.00 2.04 0.68 636
25
20
3.12 1.75 0.56 668
25
22
3.25 1.43 0.44 692
25
24
3.42 1.09 0.32 723
26
18
3.00 2.16 0.72 636
26
20
3.12 1.87 0.60 668
26
22
3.25 1.56 0.48 692
26
24
3.42 1.23 0.36 723
26
26
3.52 0.84 0.24 763
27
18
3.00 2.28 0.76 636
27
20
3.12 2.00 0.64 668
27
22
3.25 1.69 0.52 692
27
24
3.42 1.37 0.40 723
27
26
3.52 0.99 0.28 763
28
18
3.00 2.40 0.80 636
28
20
3.12 2.12 0.68 668
28
22
3.25 1.82 0.56 692
28
24
3.42 1.50 0.44 723
28
26
3.52 1.13 0.32 763
29
18
3.00 2.52 0.84 636
29
20
3.12 2.25 0.72 668
29
22
3.25 1.95 0.60 692
29
24
3.42 1.64 0.48 723
29
26
3.52 1.27 0.36 763
30
18
3.00 2.64 0.88 636
30
20
3.12 2.37 0.76 668
30
22
3.25 2.08 0.64 692
30
24
3.42 1.78 0.52 723
30
26
3.52 1.41 0.40 763
31
18
3.00 2.76 0.92 636
31
20
3.12 2.50 0.80 668
31
22
3.25 2.21 0.68 692
31
24
3.42 1.91 0.56 723
31
26
3.52 1.55 0.44 763
32
18
3.00 2.88 0.96 636
32
20
3.12 2.62 0.84 668
32
22
3.25 2.34 0.72 692
32
24
3.42 2.05 0.60 723
32
26
3.52 1.69 0.48 763
NOTE
Q :Total capacity (kW)
SHC :Sensible heat capacity (kW)
OUTDOOR DB(:)
25
27
30
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT
2.87 1.49 0.52 668 2.75 1.43 0.52 700 2.65 1.38 0.52 731
3.00 1.20 0.40 708 2.91 1.16 0.40 723 2.81 1.12 0.40 755
2.87 1.61 0.56 668 2.75 1.54 0.56 700 2.65 1.49 0.56 731
3.00 1.32 0.44 708 2.91 1.28 0.44 723 2.81 1.23 0.44 755
3.14 1.00 0.32 735 3.06 0.98 0.32 755 2.93 0.94 0.32 787
2.87 1.72 0.60 668 2.75 1.65 0.60 700 2.65 1.59 0.60 731
3.00 1.44 0.48 708 2.91 1.40 0.48 723 2.81 1.35 0.48 755
3.14 1.13 0.36 735 3.06 1.10 0.36 755 2.93 1.06 0.36 787
2.87 1.84 0.64 668 2.75 1.76 0.64 700 2.65 1.70 0.64 731
3.00 1.56 0.52 708 2.91 1.51 0.52 723 2.81 1.46 0.52 755
3.14 1.25 0.40 735 3.06 1.22 0.40 755 2.93 1.17 0.40 787
3.29 0.92 0.28 763 3.21 0.90 0.28 787 3.11 0.87 0.28 827
2.87 1.95 0.68 668 2.75 1.87 0.68 700 2.65 1.80 0.68 731
3.00 1.68 0.56 708 2.91 1.63 0.56 723 2.81 1.57 0.56 755
3.14 1.38 0.44 735 3.06 1.35 0.44 755 2.93 1.29 0.44 787
3.29 1.05 0.32 763 3.21 1.03 0.32 787 3.11 1.00 0.32 827
2.87 2.07 0.72 668 2.75 1.98 0.72 700 2.65 1.91 0.72 731
3.00 1.80 0.60 708 2.91 1.74 0.60 723 2.81 1.68 0.60 755
3.14 1.51 0.48 735 3.06 1.47 0.48 755 2.93 1.41 0.48 787
3.29 1.18 0.36 763 3.21 1.16 0.36 787 3.11 1.12 0.36 827
3.42 0.82 0.24 803 3.37 0.81 0.24 827 3.26 0.78 0.24 851
2.87 2.18 0.76 668 2.75 2.09 0.76 700 2.65 2.02 0.76 731
3.00 1.92 0.64 708 2.91 1.86 0.64 723 2.81 1.80 0.64 755
3.14 1.63 0.52 735 3.06 1.59 0.52 755 2.93 1.52 0.52 787
3.29 1.32 0.40 763 3.21 1.29 0.40 787 3.11 1.24 0.40 827
3.42 0.96 0.28 803 3.37 0.94 0.28 827 3.26 0.91 0.28 851
2.87 2.30 0.80 668 2.75 2.20 0.80 700 2.65 2.12 0.80 731
3.00 2.04 0.68 708 2.91 1.98 0.68 723 2.81 1.91 0.68 755
3.14 1.76 0.56 735 3.06 1.71 0.56 755 2.93 1.64 0.56 787
3.29 1.45 0.44 763 3.21 1.41 0.44 787 3.11 1.37 0.44 827
3.42 1.09 0.32 803 3.37 1.08 0.32 827 3.26 1.04 0.32 851
2.87 2.41 0.84 668 2.75 2.31 0.84 700 2.65 2.23 0.84 731
3.00 2.16 0.72 708 2.91 2.09 0.72 723 2.81 2.02 0.72 755
3.14 1.88 0.60 735 3.06 1.84 0.60 755 2.93 1.76 0.60 787
3.29 1.58 0.48 763 3.21 1.54 0.48 787 3.11 1.49 0.48 827
3.42 1.23 0.36 803 3.37 1.21 0.36 827 3.26 1.18 0.36 851
2.87 2.52 0.88 668 2.75 2.42 0.88 700 2.65 2.33 0.88 731
3.00 2.28 0.76 708 2.91 2.21 0.76 723 2.81 2.13 0.76 755
3.14 2.01 0.64 735 3.06 1.96 0.64 755 2.93 1.88 0.64 787
3.29 1.71 0.52 763 3.21 1.67 0.52 787 3.11 1.62 0.52 827
3.42 1.37 0.40 803 3.37 1.35 0.40 827 3.26 1.31 0.40 851
2.87 2.64 0.92 668 2.75 2.53 0.92 700 2.65 2.44 0.92 731
3.00 2.40 0.80 708 2.91 2.33 0.80 723 2.81 2.24 0.80 755
3.14 2.13 0.68 735 3.06 2.08 0.68 755 2.93 1.99 0.68 787
3.29 1.84 0.56 763 3.21 1.80 0.56 787 3.11 1.74 0.56 827
3.42 1.50 0.44 803 3.37 1.48 0.44 827 3.26 1.44 0.44 851
2.87 2.75 0.96 668 2.75 2.64 0.96 700 2.65 2.55 0.96 731
3.00 2.52 0.84 708 2.91 2.44 0.84 723 2.81 2.36 0.84 755
3.14 2.26 0.72 735 3.06 2.20 0.72 755 2.93 2.11 0.72 787
3.29 1.97 0.60 763 3.21 1.93 0.60 787 3.11 1.87 0.60 827
3.42 1.64 0.48 803 3.37 1.62 0.48 827 3.26 1.57 0.48 851
SHF :Sensible heat factor
DB :Dry-bulb temperature
INPUT :Total power input (W)
WB :Wet-bulb temperature
15
OB331-1.qxp
03.12.3 1:20 PM
Page 16
PERFORMANCE DATA
COOL operation (230V)
MSC-A09YV - E1 : MUH-A09YV - E1
CAPACITY : 2.55(KW) SHF : 0.70
INPUT : 795(W)
OUTDOOR DB(:)
35
40
INDOOR INDOOR
DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q
21
18
2.50 1.30 0.52 779 2.30 1.19 0.52 827 2.21
21
20
2.63 1.05 0.40 811 2.45 0.98 0.40 851 2.36
22
18
2.50 1.40 0.56 779 2.30 1.29 0.56 827 2.21
22
20
2.63 1.16 0.44 811 2.45 1.08 0.44 851 2.36
22
22
2.78 0.89 0.32 843 2.60 0.83 0.32 890 2.51
23
18
2.50 1.50 0.60 779 2.30 1.38 0.60 827 2.21
23
20
2.63 1.26 0.48 811 2.45 1.18 0.48 851 2.36
23
22
2.78 1.00 0.36 843 2.60 0.94 0.36 890 2.51
24
18
2.50 1.60 0.64 779 2.30 1.47 0.64 827 2.21
24
20
2.63 1.37 0.52 811 2.45 1.27 0.52 851 2.36
24
22
2.78 1.11 0.40 843 2.60 1.04 0.40 890 2.51
24
24
2.93 0.82 0.28 875 2.75 0.77 0.28 914 2.68
25
18
2.50 1.70 0.68 779 2.30 1.56 0.68 827 2.21
25
20
2.63 1.47 0.56 811 2.45 1.37 0.56 851 2.36
25
22
2.78 1.22 0.44 843 2.60 1.14 0.44 890 2.51
25
24
2.93 0.94 0.32 875 2.75 0.88 0.32 914 2.68
26
18
2.50 1.80 0.72 779 2.30 1.65 0.72 827 2.21
26
20
2.63 1.58 0.60 811 2.45 1.47 0.60 851 2.36
26
22
2.78 1.33 0.48 843 2.60 1.25 0.48 890 2.51
26
24
2.93 1.06 0.36 875 2.75 0.99 0.36 914 2.68
26
26
3.09 0.74 0.24 906 2.91 0.70 0.24 946 2.82
27
18
2.50 1.90 0.76 779 2.30 1.74 0.76 827 2.21
27
20
2.63 1.68 0.64 811 2.45 1.57 0.64 851 2.36
27
22
2.78 1.45 0.52 843 2.60 1.35 0.52 890 2.51
27
24
2.93 1.17 0.40 875 2.75 1.10 0.40 914 2.68
27
26
3.09 0.86 0.28 906 2.91 0.81 0.28 946 2.82
28
18
2.50 2.00 0.80 779 2.30 1.84 0.80 827 2.21
28
20
2.63 1.79 0.68 811 2.45 1.66 0.68 851 2.36
28
22
2.78 1.56 0.56 843 2.60 1.46 0.56 890 2.51
28
24
2.93 1.29 0.44 875 2.75 1.21 0.44 914 2.68
28
26
3.09 0.99 0.32 906 2.91 0.93 0.32 946 2.82
29
18
2.50 2.10 0.84 779 2.30 1.93 0.84 827 2.21
29
20
2.63 1.89 0.72 811 2.45 1.76 0.72 851 2.36
29
22
2.78 1.67 0.60 843 2.60 1.56 0.60 890 2.51
29
24
2.93 1.41 0.48 875 2.75 1.32 0.48 914 2.68
29
26
3.09 1.11 0.36 906 2.91 1.05 0.36 946 2.82
30
18
2.50 2.20 0.88 779 2.30 2.02 0.88 827 2.21
30
20
2.63 2.00 0.76 811 2.45 1.86 0.76 851 2.36
30
22
2.78 1.78 0.64 843 2.60 1.66 0.64 890 2.51
30
24
2.93 1.52 0.52 875 2.75 1.43 0.52 914 2.68
30
26
3.09 1.23 0.40 906 2.91 1.16 0.40 946 2.82
31
18
2.50 2.30 0.92 779 2.30 2.11 0.92 827 2.21
31
20
2.63 2.10 0.80 811 2.45 1.96 0.80 851 2.36
31
22
2.78 1.89 0.68 843 2.60 1.77 0.68 890 2.51
31
24
2.93 1.64 0.56 875 2.75 1.54 0.56 914 2.68
31
26
3.09 1.36 0.44 906 2.91 1.28 0.44 946 2.82
32
18
2.50 2.40 0.96 779 2.30 2.20 0.96 827 2.21
32
20
2.63 2.21 0.84 811 2.45 2.06 0.84 851 2.36
32
22
2.78 2.00 0.72 843 2.60 1.87 0.72 890 2.51
32
24
2.93 1.76 0.60 875 2.75 1.65 0.60 914 2.68
32
26
3.09 1.48 0.48 906 2.91 1.40 0.48 946 2.82
NOTE
Q :Total capacity (kW)
SHF :Sensible heat factor
SHC :Sensible heat capacity (kW)
INPUT :Total power input (W)
16
43
SHC SHF INPUT
1.15 0.52 843
0.94 0.40 875
1.24 0.56 843
1.04 0.44 875
0.80 0.32 906
1.32 0.60 843
1.13 0.48 875
0.90 0.36 906
1.41 0.64 843
1.23 0.52 875
1.00 0.40 906
0.75 0.28 934
1.50 0.68 843
1.32 0.56 875
1.11 0.44 906
0.86 0.32 934
1.59 0.72 843
1.42 0.60 875
1.21 0.48 906
0.96 0.36 934
0.68 0.24 966
1.68 0.76 843
1.51 0.64 875
1.31 0.52 906
1.07 0.40 934
0.79 0.28 966
1.76 0.80 843
1.60 0.68 875
1.41 0.56 906
1.18 0.44 934
0.90 0.32 966
1.85 0.84 843
1.70 0.72 875
1.51 0.60 906
1.29 0.48 934
1.01 0.36 966
1.94 0.88 843
1.79 0.76 875
1.61 0.64 906
1.39 0.52 934
1.13 0.40 966
2.03 0.92 843
1.89 0.80 875
1.71 0.68 906
1.50 0.56 934
1.24 0.44 966
2.12 0.96 843
1.98 0.84 875
1.81 0.72 906
1.61 0.60 934
1.35 0.48 966
DB :Dry-bulb temperature
WB :Wet-bulb temperature
OB331-1.qxp
03.12.3 1:20 PM
Page 17
PERFORMANCE DATA
COOL operation (230V)
MSC-A12YV - E1 : MUH-A12YV - E1
CAPACITY : 3.5(KW) SHF : 0.66
INDOOR INDOOR
DB(:) WB(:)
21
18
21
20
22
18
22
20
22
22
23
18
23
20
23
22
24
18
24
20
24
22
24
24
25
18
25
20
25
22
25
24
26
18
26
20
26
22
26
24
26
26
27
18
27
20
27
22
27
24
27
26
28
18
28
20
28
22
28
24
28
26
29
18
29
20
29
22
29
24
29
26
30
18
30
20
30
22
30
24
30
26
31
18
31
20
31
22
31
24
31
26
32
18
32
20
32
22
32
24
32
26
NOTE
Q
4.11
4.29
4.11
4.29
4.46
4.11
4.29
4.46
4.11
4.29
4.46
4.69
4.11
4.29
4.46
4.69
4.11
4.29
4.46
4.69
4.83
4.11
4.29
4.46
4.69
4.83
4.11
4.29
4.46
4.69
4.83
4.11
4.29
4.46
4.69
4.83
4.11
4.29
4.46
4.69
4.83
4.11
4.29
4.46
4.69
4.83
4.11
4.29
4.46
4.69
4.83
INPUT : 1090(W)
OUTDOOR DB(:)
21
25
27
30
SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Q :Total capacity (kW)
SHC :Sensible heat capacity (kW)
SHF :Sensible heat factor
INPUT :Total power input (W)
17
DB :Dry-bulb temperature
WB :Wet-bulb temperature
OB331-1.qxp
03.12.3 1:20 PM
Page 18
PERFORMANCE DATA
COOL operation (230V)
MSC-A12YV - E1 : MUH-A12YV - E1
CAPACITY : 3.5(KW) SHF : 0.66
INPUT : 1090(W)
OUTDOOR DB(:)
35
40
INDOOR INDOOR
DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q
21
18
3.43 1.65 0.48 1068 3.15 1.51 0.48 1134 3.03
21
20
3.61 1.30 0.36 1112 3.36 1.21 0.36 1166 3.24
22
18
3.43 1.78 0.52 1068 3.15 1.64 0.52 1134 3.03
22
20
3.61 1.44 0.40 1112 3.36 1.34 0.40 1166 3.24
22
22
3.82 1.07 0.28 1155 3.57 1.00 0.28 1221 3.45
23
18
3.43 1.92 0.56 1068 3.15 1.76 0.56 1134 3.03
23
20
3.61 1.59 0.44 1112 3.36 1.48 0.44 1166 3.24
23
22
3.82 1.22 0.32 1155 3.57 1.14 0.32 1221 3.45
24
18
3.43 2.06 0.60 1068 3.15 1.89 0.60 1134 3.03
24
20
3.61 1.73 0.48 1112 3.36 1.61 0.48 1166 3.24
24
22
3.82 1.37 0.36 1155 3.57 1.29 0.36 1221 3.45
24
24
4.03 0.97 0.24 1199 3.78 0.91 0.24 1254 3.68
25
18
3.43 2.20 0.64 1068 3.15 2.02 0.64 1134 3.03
25
20
3.61 1.87 0.52 1112 3.36 1.75 0.52 1166 3.24
25
22
3.82 1.53 0.40 1155 3.57 1.43 0.40 1221 3.45
25
24
4.03 1.13 0.28 1199 3.78 1.06 0.28 1254 3.68
26
18
3.43 2.33 0.68 1068 3.15 2.14 0.68 1134 3.03
26
20
3.61 2.02 0.56 1112 3.36 1.88 0.56 1166 3.24
26
22
3.82 1.68 0.44 1155 3.57 1.57 0.44 1221 3.45
26
24
4.03 1.29 0.32 1199 3.78 1.21 0.32 1254 3.68
26
26
4.24 0.85 0.20 1243 3.99 0.80 0.20 1297 3.87
27
18
3.43 2.47 0.72 1068 3.15 2.27 0.72 1134 3.03
27
20
3.61 2.16 0.60 1112 3.36 2.02 0.60 1166 3.24
27
22
3.82 1.83 0.48 1155 3.57 1.71 0.48 1221 3.45
27
24
4.03 1.45 0.36 1199 3.78 1.36 0.36 1254 3.68
27
26
4.24 1.02 0.24 1243 3.99 0.96 0.24 1297 3.87
28
18
3.43 2.61 0.76 1068 3.15 2.39 0.76 1134 3.03
28
20
3.61 2.31 0.64 1112 3.36 2.15 0.64 1166 3.24
28
22
3.82 1.98 0.52 1155 3.57 1.86 0.52 1221 3.45
28
24
4.03 1.61 0.40 1199 3.78 1.51 0.40 1254 3.68
28
26
4.24 1.19 0.28 1243 3.99 1.12 0.28 1297 3.87
29
18
3.43 2.74 0.80 1068 3.15 2.52 0.80 1134 3.03
29
20
3.61 2.45 0.68 1112 3.36 2.28 0.68 1166 3.24
29
22
3.82 2.14 0.56 1155 3.57 2.00 0.56 1221 3.45
29
24
4.03 1.77 0.44 1199 3.78 1.66 0.44 1254 3.68
29
26
4.24 1.36 0.32 1243 3.99 1.28 0.32 1297 3.87
30
18
3.43 2.88 0.84 1068 3.15 2.65 0.84 1134 3.03
30
20
3.61 2.60 0.72 1112 3.36 2.42 0.72 1166 3.24
30
22
3.82 2.29 0.60 1155 3.57 2.14 0.60 1221 3.45
30
24
4.03 1.93 0.48 1199 3.78 1.81 0.48 1254 3.68
30
26
4.24 1.52 0.36 1243 3.99 1.44 0.36 1297 3.87
31
18
3.43 3.02 0.88 1068 3.15 2.77 0.88 1134 3.03
31
20
3.61 2.74 0.76 1112 3.36 2.55 0.76 1166 3.24
31
22
3.82 2.44 0.64 1155 3.57 2.28 0.64 1221 3.45
31
24
4.03 2.09 0.52 1199 3.78 1.97 0.52 1254 3.68
31
26
4.24 1.69 0.40 1243 3.99 1.60 0.40 1297 3.87
32
18
3.43 3.16 0.92 1068 3.15 2.90 0.92 1134 3.03
32
20
3.61 2.88 0.80 1112 3.36 2.69 0.80 1166 3.24
32
22
3.82 2.59 0.68 1155 3.57 2.43 0.68 1221 3.45
32
24
4.03 2.25 0.56 1199 3.78 2.12 0.56 1254 3.68
32
26
4.24 1.86 0.44 1243 3.99 1.76 0.44 1297 3.87
NOTE
Q :Total capacity (kW)
SHF :Sensible heat factor
SHC :Sensible heat capacity (kW)
INPUT :Total power input (W)
18
43
SHC SHF INPUT
1.45 0.48 1155
1.17 0.36 1199
1.57 0.52 1155
1.30 0.40 1199
0.97 0.28 1243
1.70 0.56 1155
1.42 0.44 1199
1.10 0.32 1243
1.82 0.60 1155
1.55 0.48 1199
1.24 0.36 1243
0.88 0.24 1281
1.94 0.64 1155
1.68 0.52 1199
1.38 0.40 1243
1.03 0.28 1281
2.06 0.68 1155
1.81 0.56 1199
1.52 0.44 1243
1.18 0.32 1281
0.77 0.20 1324
2.18 0.72 1155
1.94 0.60 1199
1.65 0.48 1243
1.32 0.36 1281
0.93 0.24 1324
2.30 0.76 1155
2.07 0.64 1199
1.79 0.52 1243
1.47 0.40 1281
1.08 0.28 1324
2.42 0.80 1155
2.20 0.68 1199
1.93 0.56 1243
1.62 0.44 1281
1.24 0.32 1324
2.54 0.84 1155
2.33 0.72 1199
2.07 0.60 1243
1.76 0.48 1281
1.39 0.36 1324
2.66 0.88 1155
2.46 0.76 1199
2.21 0.64 1243
1.91 0.52 1281
1.55 0.40 1324
2.79 0.92 1155
2.59 0.80 1199
2.34 0.68 1243
2.06 0.56 1281
1.70 0.44 1324
DB :Dry-bulb temperature
WB :Wet-bulb temperature
OB331-1.qxp
03.12.3 1:20 PM
Page 19
PERFORMANCE DATA
HEAT operation (230V)
MSC-A07YV - E1 : MUH-A07YV - E1
CAPACITY : 2.5(KW) INPUT : 690(W)
OUTDOOR WB(:)
INDOOR
-10
-5
0
5
10
15
20
DB(:)
Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT
3.50 731
2.88 697 3.18 718
2.23 607 2.55 656
1.58 449 1.90 538
15
3.36 766
2.75 718 3.05 738
2.13 635 2.43 683
1.50 483 1.80 573
21
3.25 794
2.63 752 2.93 773
1.98 669 2.30 718
1.35 518 1.68 607
26
MSC-A09YV - E1 : MUH-A09YV - E1
CAPACITY : 3.05(KW) INPUT : 840(W)
OUTDOOR WB(:)
INDOOR
-10
-5
0
5
10
15
20
DB(:)
Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT
4.27 890
3.51 848 3.87 874
2.71 739 3.11 798
1.92 546 2.32 655
15
4.10 932
3.36 874 3.72 899
2.59 773 2.96 832
1.83 588 2.20 697
21
3.97 966
3.20 916 3.57 941
2.41 815 2.81 874
1.65 630 2.04 739
26
MSC-A12YV - E1 : MUH-A12YV - E1
CAPACITY : 3.9(KW) INPUT : 1080(W)
OUTDOOR WB(:)
INDOOR
-10
-5
0
5
10
15
20
DB(:)
Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT
3.47 950 3.98 1026 4.49 1091 4.95 1123 5.46 1145
2.46 702 2.96 842
15
3.32 994 3.78 1069 4.29 1123 4.76 1156 5.25 1199
2.34 756 2.81 896
21
3.08 1048 3.59 1123 4.10 1177 4.56 1210 5.07 1242
2.11 810 2.61 950
26
NOTE
Q:Total capacity (kW)
INPUT:Total power input (W)
19
DB:Dry-bulb temperature
WB:Wet-bulb temperature
OB331-1.qxp
9
03.12.3 1:20 PM
Page 20
MICROPROCESSOR CONTROL
MUH-A07YV - E1
MUH-A09YV - E1
MUH-A12YV - E1
9-1. HEAT (
) OPERATION
1. High pressure protection
During heating operation, the outdoor fan motor is controlled by the temperature of indoor coil thermistor RT12 for excess
rise protection of compressor discharge pressure.
Outdoor fan OFF: 52:
Outdoor fan
Outdoor fan ON: 48:
High pressure protection
OFF
Released
Operation chart
Example
Indoor coil thermistor
RT12 temperature
48: 52:
ON
52˚C
Outdoor fan motor
turn OFF
48˚C
Outdoor fan motor
turn ON
ON
ON
Outdoor fan motor
OFF
OFF
NOTE : During high pressure protection and for 4 min. and 15 sec. after high pressure protection, defrosting of outdoor heat
exchanger is not detected by the defrost thermistor RT61.(Refer to 9-1.2. Defrosting.)
2. Defrosting
Defrosting of outdoor heat exchanger is controlled by DEICER P.C. board, with detection by the defrost thermistor RT61.
(1) Starting conditions of defrost
When all conditions of a) ~ c) are satisfied, the defrosting operation starts.
a) The compressor cumulative operation time exceeds 40 minutes without the defrosting operation working.
b) RT61 reads - 3°C or less.
c) After releasing the high pressure protection 4 minutes and 15 seconds have elapsed.
(2) Releasing conditions of defrost
When the condition d) or e) is satisfied, the defrosting operation stops.
d) RT61 reads 10.1°C or more.
e) The defrosting time exceeds 10 minutes.
20
OB331-1.qxp
03.12.3 1:20 PM
Page 21
Operation time chart
Example
Defrost thermistor RT61
10.1: or more
-3: or less
Outdoor 52C
contactor
(Compressor)
ON
OFF
X62
(R.V. coil)
15 sec.
ON
OFF
SR61
Outdoor fan
ON
Defrost
counter
ON
30 sec.
5 sec.
OFF
OFF
Max 10 min.
❈
Indoor fan
30 sec.
NOTE
ON
Very Low
OFF
Indoor
Horizontal
Horizontal vane
Set position
NOTE ● When the indoor coil thermistor RT12 reads above 0°C, indoor fan operates at Very Low for 30 seconds.
● When the indoor coil thermistor RT12 reads 0°C or less, the indoor fan stops.
3. R.V. coil control
Heating · · · · · ON
Cooling · · · · · OFF
Dry · · · · · · · · OFF
When operation starts, the 4-way valve reverses for 5 seconds right before start-up of the compressor.
Operation time chart
(HEAT)
(COOL/DRY)
5 sec.
5 sec.
ON
OFF
R.V. coil
ON
OFF
ON
OFF
Outdoor fan
ON
OFF
ON
OFF
Compressor
9-2. “I FEEL CONTROL” (
) OPERATION
9-2-1. HEAT mode of “I FEEL CONTROL”
1. High pressure protection
High pressure protection is as same as HEAT OPERATION.(9-1.1.)
2. Defrosting
Defrosting is as same as HEAT OPERATION.(9-1.2.)
3. R.V. coil control
R.V. coil control is as same as HEAT OPERATION.(9-1.3.)
21
ON
OFF
OB331-1.qxp
10
03.12.3 1:20 PM
Page 22
SERVICE FUNCTIONS
MUH-A07YV - E1
MUH-A09YV - E1
MUH-A12YV - E1
10-1. 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 accomplished regardless of the defrost interval restriction. (Refer to page 28.)
Defrost thermistor RT61 must read below -3°C.
10-2. 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 page 28.)
MODEL
Jumper wire
MUH-A07YV -
E1
MUH-A09YV -
E1
MUH-A12YV -
E1
11
Change point
JRF
Defrost interval time changes from 40 minutes to 15 minutes.
JRG
Deforst start temperature changes from -3: to 0:.
TROUBLESHOOTING
MUH-A07YV - E1
MUH-A09YV - E1
MUH-A12YV - E1
11-1. 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 first turn off the remote controller to stop the unit, and then after confirming 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.
Lead wiring
Housing point
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 the flow chart on page 23 and the check table on page 24.
22
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03.12.3 1:20 PM
Page 23
11-2. Instruction of troubleshooting
MUH-A07YV - E1
MUH-A09YV - E1
MUH-A12YV - E1
Start
Indoor unit
operates.
Outdoor unit
doesn't
operate.
Outdoor unit
operates in
only Test Run
operation.
Check room
temperature
thermistor.
Refer to
"Test point
diagram and
voltage".
Outdoor unit
doesn't
operate
even in
Test Run
operation.
Refer to A
"Check of
outdoor unit"
on page 24.
Indoor unit
operates.
Outdoor unit
doesn't operate
normally.
Outdoor unit
doesn't
stop even
if indoor unit
stops.
Refer to B
"Check of
outdoor unit"
on page 25.
Indoor unit
doesn't receive
the signal from
remote controller.
Unit doesn't
operate
normal
operation in
COOL or
HEAT mode.
Refer to C
"Check of
R.V. coil"
on page 25.
1-time flash
Cause:
Outdoor /
Indoor unit
• Trouble of
serial signal
2-time flash
Cause:
Indoor unit
• Trouble of
room temperature/
indoor coil
thermistor
3-time flash
Cause:
Indoor unit
• Trouble of
indoor fan
motor
Refer to D "How to check
mis-wiring and serial signal
error (When outdoor unit
doesn't work)" on page 26.
W1
Check room
temperature
thermistor
and indoor
coil thermistor.
Refer to
"Test point
diagram and
voltage".
Refer to
"Check of
indoor fan
motor".
Flash on and
off at 0.5second
intervals
Cause:
Indoor/
Outdoor unit
• Mis-wiring
OPERATION
INDICATOR
lamp on the
indoor unit is
flashing on
and off.
Indoor unit
operates,
when the
EMERGENCY
OPERATION
switch is
pressed.
Indoor unit
doesn't operate,
when the
EMERGENCY
OPERATION
switch is
pressed.
Refer to
"Check of
remote
controller
and receiver
P.C. board".
1. Check indoor /
outdoor
connecting wire.
2. Refer to
"Check of indoor
electronic control
P.C. board".
7-time flash
6-time flash
Cause:
Cause:
Outdoor unit
Outdoor unit
• Trouble of
• Trouble of
outdoor
thermistor
control
in outdoor
system
unit
Refer to E
"Check of
outdoor
thermistor"
on page 27.
As for indoor unit,
refer to service
manual OB329.
Replace the
deicer
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
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03.12.3 1:20 PM
Page 24
11-3. Trouble criterion of main parts
MUH-A07YV - E1
MUH-A09YV - E1
MUH-A12YV - E1
Figure
Check method and criterion
Part name
Measure the resistance with a tester.
(Part temperature –10°C ~ 40°C)
Defrost
thermistor
(RT63)
Compressor
(MC)
INNER
PROTECTOR
Normal
Abnormal
5kΩ ~ 60kΩ
Open or short-circuit
Measure the resistance between the terminals with a tester.
(Coil wiring temperature –10°C ~ 40°C)
WHT C
P
MUH-A07/A09YV
Normal
150i 5°C OPEN
90i10°C CLOSE
MUH-A07YV MUH-A09YV MUH-A12YV
MUH-A12YV
C-R 3.41~4.18Ω
2.99~3.67Ω
2.46~3.01Ω
155i 5°C OPEN
90i10°C CLOSE
C-S 5.41~6.63Ω
4.02~4.92Ω
2.96~3.63Ω
AUX. MAIN
Abnormal
S
R
RED
BLK
Open or short-circuit
MUH-A07YV
Outdoor fan
motor
(MF)
INNER
PROTECTOR
MAIN
AUX.
Measure the resistance between the terminals with a tester.
(Coil wiring temperature –10°C ~ 40°C)
MUH-A07YV
130i 5°C OPEN
83i15°C CLOSE
INNER FUSE
MUH-A09/A12YV
Normal
Color of
lead wire
MUH-A07YV
WHT-BLK
361 ~ 443Ω
196 ~ 241Ω
BLK-RED
381 ~ 468Ω
201 ~ 246Ω
P
BLK
Abnormal
MUH-A09/A12YV
RED WHT
MUH-A09/A12YV
MAIN
Open or short-circuit
AUX.
FUSE
145i 2°C
CUT OFF
BLK
RED WHT
P INNER PROTECTOR
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?
Yes
No
Change the switch SW-2-2
on the indoor electronic control
P.C. board to MUH type.
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
Is there 5V DC between J205 + –J101 – on
the deicer P.C. board?
Yes
Is there 230V AC between 3 on the
compressor contactor (52C) and N
on the outdoor terminal block (TB1)?
Yes
No
Is there 230V AC between 4 on the
compressor contactor (52C) and
TAB20 on the deicer P.C. board?
Yes
Replace the
Replace the
deicer P.C.
deicer P.C. board.
board.
No
No
Is there 230V AC between L–N
on the outdoor terminal block (TB1)?
Yes
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 5V DC between J205 + –J101 – on
the deicer P.C. board?
Yes
Check the outdoor fan motor
and rectify the connecting
wire.
No
Is there 230V AC between 4 on the
compressor contactor (52C) and
TAB 20 on the deicer P.C. board?
Yes
Replace the
deicer P.C. board.
24
No
Is there 230V AC between L–N on
the outdoor terminal block (TB1)?
Yes
Rectify the connecting wire.
OB331-1.qxp
03.12.3 1:20 PM
Page 25
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.
No
Does compressor stop?
Yes
OK
No
Rectify the connecting wire.
Replace the
deicer P.C. board.
No
Does outdoor fan motor stop?
Is there 230V AC between 3 on the
compressor contactor (52C) and N on the
outdoor terminal block (TB1)?
Yes
Replace the
deicer P.C. board.
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
operate in COOL mode?
OK
Yes
Is there 230V AC between
CN7211 – 2 on 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
After 3 minutes, does the unit
operate in HEAT mode?
No
Ok
Yes
Is there 230V AC between
CN7211 – 2 on the deicer
P.C. board?
Yes
Replace the
deicer P.C. board.
25
No
Replace the R.V. coil.
OB331-1.qxp
03.12.3 1:20 PM
Page 26
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
w 1 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
w 2 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.
Yes
Serial signal error is indicated.
(0.5-sec. ON, 2.5-sec. OFF)
3 min. later, what self-check result is
displayed on OPERATION INDICATOR
lamp on indoor unit? w 2
Does the unit operate?
Mis-wiring is indicated.
(0.5-sec. ON, 0.5-sec. OFF)
Yes
Make them sure.
No
Refer to the
"Instruction of
troubleshooting."
Is this mis-wiring, poor contact,
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
R132 on indoor electronic control P.C.
board ?
( By tester, the stylus is between 0 ~ 20V. )
No
Replace the indoor electronic
control P.C. board.
Yes
•Turn OFF the power supply(indoor unit).
•Connect ON indoor and outdoor connecting wire.
Turn ON the power supply(outdoor unit).
Is there 230V AC between outdoor terminal
block L-N (TB1)?
No
Yes
Is there 5V DC between J205 + –J101 - on the deicer P.C. board?
Check the outdoor power supply,
power supply cord and
connection.
No
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?
(By tester, the stylus is between 5 ~10V)
Yes
Replace the deicer P.C. board.
As for indoor unit, refer to service manual OB329.
26
No
Make the wiring between CN730
on the deicer P.C. board and
outdoor terminal block correct.
OK
OB331-1.qxp
03.12.3 1:20 PM
Page 27
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)
Turn OFF the
power supply.
Measure
resistance
between CN 661
1 and 2.
Is the resistance of
thermistor normal?
Yes
No
Reconnect CN661.
Turn ON the power
supply and press
the EMERGENCY
OPERATION
switch.
No
Does the unit operate
10 minutes or more?
Yes
OK ❈
Replace the
thermistor.
❈ Defective contact of the connector is considered.
27
OB331-1.qxp
03.12.3 1:21 PM
Page 28
Power supply input
230V AC
}
}
CN711
CN721
Outdoor fan motor R.V. coil
230V AC
230V AC
}
MUH-A07YV - E1
MUH-A09YV - E1
MUH-A12YV - E1
Outdoor deicer P.C. board
NR61
Varistor
F61
Fuse
2A/250V
+
--
}
CN661 1-2
Defrost thermistor RT61
12V DC
J204 +
J101 --
28
R601
5~10VDC
Defrost interval time
short pin
(JPDS, JPSG)
(Refer to page 22.)
Jumper wire for
change in
defrost setting
(JRF,JRG)
(Refer to page
22.)
}
5V DC
J205 +
J101 --
}
OB331-1.qxp
03.12.3 1:21 PM
12
Page 29
DISASSEMBLY INSTRUCTIONS
<"Terminal with lock mechanism" Detaching points>
In case of terminal with lock mechanism, detach the terminal as shown below.
There are two types ( Refer to (1) and (2)) of the terminal with lock mechanism.
The terminal with no lock mechanism can be removed by pulling it out.
Check the shape of the terminal and work.
(1) Slide the sleeve and check if there is a locking lever or not.
(2) The terminal with this connector is a terminal
with lock mechanism
Sleeve
1Slide the sleeve.
2Pull the terminal while
pushing the locking
lever.
Locking lever
MUH-A07YV - E1 MUH-A09YV OUTDOOR UNIT
E1
MUH-A12YV -
1Hold the sleeve, and
pull out the terminal
slowly.
Connector
E1
OPERATING PROCEDURE
PHOTOS
1. Removing the cabinet
(1)
(2)
(3)
(4)
(5)
Remove the
Remove the
Remove the
Remove the
Remove the
the insides.
(6) Remove the
(7) Remove the
screws of the top panel.
screw of the service panel.
screws of the cabinet.
screws of the front panel and motor support.
service panel, and remove the screw from
Photo 1
Screws of the front panel and motor support
top panel.
cabinet.
Screws
of the
cabinet
Photo 3
Screws of the
service panel
Screws of the cabinet
Screws of
the top panel
Photo 2
Service
panel
Screw of the
top panel
Screws of the
cabinet
29
OB331-1.qxp
03.12.3 1:21 PM
Page 30
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.
(3) Remove the deicer P.C. board.
Deicer
P.C. board
Relay panel
Screw
3. Removing the propeller and the outdoor fan motor
(1) Remove the cabinet. (Refer to 1.)
(2) Remove the propeller nut.
(3) Remove the propeller.
NOTE : Loose the propeller in the rotating direction for
removal.
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.
(4) Remove lead clamps and disconnect the outdoor fan motor
connector.
(5) Remove screws fixing the fan motor.
(6) Remove the outdoor fan motor.
Screws
Photo 5
Lead clamps
Screws of the
outdoor fan motor Hook
Propeller Propeller
nut
Screws of the
outdoor fan motor
30
Terminal
block
Outdoor
fan motor
connector
OB331-2.qxp
03.12.3 1:22 PM
Page 31
OPERATING PROCEDURE
PHOTOS
4. Removing the compressor
(1)
(2)
(3)
(4)
(5)
Remove the cabinet. (Refer to 1.)
Remove the relay panel.
Remove the soundproof felt.
Remove the terminal cover on the compressor.
Disconnect lead wires from the glass terminal of the compressor.
(6) Recover gas from the refrigerant circuit.
(7) Disconnect the welded part of the discharge pipe.
(8) Disconnect the welded part of the suction pipe.
(9) Remove nuts fixing the compressor.
(10) Remove the compressor.
Photo 6
Discharge pipe
Suction pipe
Glass
terminal
Compressor
NOTE
● Before using a burner, reclaim gas from the pipes until the
pressure gauge shows 0 kg/cm2 (0 MPa).
● Use the burner under the condition that gas can be recovered
even when the inner pressure rises by heat.
Compressor
set nuts
31
Terminal cover
OB331-2.qxp
03.12.3 1:22 PM
Page 32
PARTS LIST
13
MUH-A07YV - E1 MUH-A09YV - E1 MUH-A12YV - E1
13-1. OUTDOOR UNIT STRUCTURAL PARTS
1
13
12
11
2
3
10
4
5
6
7
8
9
Part numbers that are circled are not shown in the illustration.
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Part No.
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
835
836
837
815
815
742
753
754
075
832
742
747
745
745
815
836
336
442
815
159
156
339
024
726
837
154
630
630
630
232
521
900
900
900
506
290
661
661
662
961
245
233
515
515
297
936
936
936
936
936
936
642
Part name
OUTDOOR HEAT EXCHANGER
OUTDOOR HEAT EXCHANGER
OUTDOOR HEAT EXCHANGER
CABINET
GRILLE(OUT)
COMPRESSOR
COMPRESSOR
COMPRESSOR
COMPRESSOR RUBBER SET
BASE
STOP VALVE(GAS)
STOP VALVE(GAS)
STOP VALVE(LIQUID)
4-WAY VALVE
SERVICE PANEL
BACK PANEL
MOTOR SUPPORT
MOTOR SUPPORT
TOP PANEL
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CHECK VALVE
Symbol
in Wiring
Diagram MUH-A07YV-
Q'ty/unit
E1
MUH-A09YV-
E1
MUH-A12YV-
Remarks
E1
1
1
1
1
1
MC
MC
MC
1
1
1
1
1
1
3
1
1
1
1
1
1
1
1
2
1
1
1
32
3
1
1
1
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
2
1
1
1
1
RN092VHSHT
RN104VHSHT
RN135VHSHT
3RUBBERS/SET
{9.52
{12.7
{6.35
{3.0x{1.4x800
{3.0x{1.4x500
{3.0x{1.4x600
{3.0x{1.4x1000
{3.0x{1.6x600
{3.0x{1.6x1050
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MUH-A07YV - E1
MUH-A09YV - E1
MUH-A12YV - E1
13-3. ACCESSORY
13-2. OUTDOOR UNIT
ELECTRICAL PARTS AND
FUNCTIONAL PARTS
7
8
2
1
3
13
12
6
5
4
13-2. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS
Part numbers that are circled are not shown in the illustration.
No.
1
2
3
4
5
6
7
8
9
10
11
Part name
Part No.
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
E02
665
835
672
752
694
696
835
836
128
817
836
699
440
095
820
501
301
301
353
353
353
451
451
383
374
374
310
490
382
385
Symbol
in Wiring
Diagram MUH-A07YV1
1
PROPELLER
OUTDOOR FAN MOTOR
MF
OUTDOOR FAN MOTOR
MF
COMPRESSOR CAPACITOR
C1
COMPRESSOR CAPACITOR
C1
COMPRESSOR CAPACITOR
C1
DEICER P.C. BOARD
DEICER P.C. BOARD
SURGE ABSORBER
DSAR
TERMINAL BLOCK
TB1
TERMINAL BLOCK
TB2
DEFROST THERMISTOR
RT61
R. V. COIL
21S4
FUSE
F61
VARISTOR
NR61
Q'ty/unit
E1
MUH-A09YV-
E1
MUH-A12YV-
1
1
1
1
1
1
1
Remarks
E1
RC6V20RA6V3320+ /440V AC
25+ /440V AC
30+ /440V AC
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
2
1
2
3P
2P
250V 2A
13-3. ACCESSORY
12 E02 817 704
13 E02 440 705
DRAIN SOCKET
DRAIN CAP
33
2PCS/SET
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HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN
C Copyright 2003 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD
Distributed in Dec. 2003. No.OB331 6
Made in Japan
New publication, effective Dec. 2003
Specifications subject to change without notice.