Mitsubishi Electric MU-GE50VB- E1 User manual

CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 3
3. SPECIFICATION················································ 3
4. NOISE CRITERIA CURVES······························ 4
5. OUTLINES AND DIMENSIONS ························ 5
6. WIRING DIAGRAM············································ 6
7. REFRIGERANT SYSTEM DIAGRAM··············· 7
8. PERFORMANCE CURVES······························· 8
9. ACTUATOR CONTROL··································· 16
10. SERVICE FUNCTIONS···································· 17
11. TROUBLESHOOTING····································· 17
12. DISASSEMBLY INSTRUCTIONS···················· 23
HFC
utilized
R410A
SPLIT-TYPE AIR CONDITIONERS
Models
MU-GE50VB- E1
MUH-GE50VB- E1
SERVICE MANUAL
OUTDOOR UNIT
Indoor unit service manual
MS/MSH-GE•VB Series (OBH529)
No. OBH530
NOTE:
• This service manual describes technical data of outdoor units.
PARTS CATALOG (OBB530)

2
TECHNICAL CHANGES
1
MU-GA50VB- E1 MU-GE50VB- E1
1. Unit size has been changed.
(W 850 mm × H 605 mm × D 290 mm W 800 mm × H 550 mm × D 285 mm)
2. Outdoor fan motor has been changed. (RA6V50-PA RA6V33-KA)
MUH-GA50VB- E1 MUH-GE50VB- E1
1. Unit size has been changed.
(W 850 mm × H 605 mm × D 290 mm W 800 mm × H 550 mm × D 285 mm)
2. Outdoor fan motor has been changed. (RA6V60-MA RA6V33-KB)

3
PART NAMES AND FUNCTIONS
2
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
back and side
MU-GE50VB
MUH-GE50VB ACCESSORIES
MUH-GE50VB
Drain socket 1
<Outdoor unit: MUH type>
SPECIFICATION
3
Outdoor model MU-GE50VB MUH-GE50VB
Function Cooling Cooling Heating
Power supply Single phase
230 V, 50 Hz Single phase 230 V, 50 Hz
Capacity kW 5.0 5.0 5.2
Electrical
data
Breaker capacity A 15 15
Running current (Total) A 8.20 8.23 7.53
Power input (Total) W 1,810 1,780 1,610
Power factor (Total) % 96 94
Starting current (Total) A37 37
Coefficient of performance (C.O.P) (Total) 2.76 2.81 3.23
Compressor
Model RN196VHSHT RN196VHSHT
Output W 1,300 1,300
Compressor motor current A 7.57 7.60 6.90
Fan
motor
Model RA6V33-KA RA6V33-KB
Fan motor current A 0.33 0.33
Dimensions W H D mm 800 550 285 800 550 285
Weight kg 38 40
Special
remarks
Dehumidification /h 2.5 2.5 -
Air flow /h 1,902 1,902
Sound level dB 52 52
Fan speed rpm 855 855
Fan speed regulator 1 1
Refrigerant filling
capacity (R410A) kg 1.35 1.45
Refrigeration oil (Model) cc 520 (NEO 22) 520 (NEO 22)
NOTE: Test conditions are based on ISO 5151.
Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Outdoor Dry-bulb temperature 35°C Wet-bulb temperature 24°C
Heating: Indoor Dry-bulb temperature 20°C Wet-bulb temperature -°C
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C
Indoor-Outdoor piping length: 5 m

4
NOISE CRITERIA CURVES
4
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-10 NC-10
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling :Dry-bulb temperature35°C Wet-bulb temperature24°C
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling :Dry-bulb temperature35°C Wet-bulb temperature24°C
Heating :Dry-bulb temperature 7°C Wet-bulb temperature 6°C
MU-GE50VB
COOL
FUNCTION
52
SPL(dB(A))LINE MUH-GE50VB COOLING
FUNCTION
52
HEATING
SPL(dB(A))LINE
OUTDOOR UNIT
MICROPHONE
1m

5
OUTLINES AND DIMENSIONS
5
10
69
800
302.5
500 Bolt pitch for installation
150
22.3
Handle
550
280
164.5
99.5
170.5
23 Service panel
Service port
285
344.5
44
400
Air in
Air out
Air in
17.5
Bolt pitch for
installation
304~325
40
Liquid refrigerant pipe joint
Refrigerant pipe (flared) ø6.35
Gas refrigerant pipe joint
Refrigerant pipe (flared) ø12.7
43°
35°
2 holes 10×21
REQUIRED SPACE Basically open 100mm or more
without any obstruction in front
and on both sides of the unit.
350mm or more
200mm or more
100mm or more
100mm or more
Open two sides of left,
right, or rear side.
Drain hole ø42
Unit: mm
OUTDOOR UNIT
MU-GE50VB MUH-GE50VB

6
WIRING DIAGRAM
6
MU-GE50VB
MUH-GE50VB

7
REFRIGERANT SYSTEM DIAGRAM
7
OUTDOOR UNIT
Unit :mm
MU-GE50VB
MUH-GE50VB
OUTDOOR UNIT
(with heat insulator)
Refrigerant pipe ø12.7 4-way valve
Defrost
thermistor
RT61
Muffler
Outdoor
heat
exchanger
Capillary tube
ø3.0 × ø1.6 × 500
Capillary tube
ø3.0 × ø1.6 × 300
Check valve
Strainer
#100
Refrigerant pipe ø6.35
(with heat insulator)
Stop valve
(with service
port)
R.V. coil
heating ON
cooling OFF
Flared connection
Flared connection
Compressor
Stop valve
Capillary tube
ø3.0 × ø1.8 × 600
(2 pcs)
Refrigerant flow in cooling
Refrigerant flow in heating
Outdoor
heat
exchanger
Capillary tube
3.0 x 1.6 x 450
Strainer
#100
Refrigerant pipe 6.35
(with heat insulator)
Stop valve
(with service port)
Compressor
Flared connection
Flared connection
Muffler
Refrigerant pipe 12.7
(with heat insulator)
Stop valve

8
The standard specifications apply only to the operation of the air conditioner under normal conditions, since operating condi-
tions 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
198~264 V
(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
(3) Outdoor intake air dry-bulb temperature: °CDB
(4) Total input: W
(5) Indoor intake air dry-bulb temperature: °CDB
(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 following chart 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.
}
}
Cooling
Heating (MUH-GE50VB)
Length of connecting pipe: m
Indoor unit
Piping size O.D: mm
Liquid
6.35
Gas
12.7
Outdoor unit
Gas 0.43
Liquid 0.5 Gas 0
Liquid 0
Model
MU-GE50VB
MUH-GE50VB 10
25
Refrigerant piping: m
Max. length
AMax. height B
Indoor
unit
Max. height
B Outdoor unit
Refrigerant Piping
Max. length
A
7 m
0
10 m
60
15 m
160
20 m
260
Calculation : Xg = 20 g/m × (A-7)m
25 m
360
MUH-GE50VB 1350
1450
MU-GE50VB
Outdoor unit precharged
Model Refrigerant piping length (one way)
MAX. HEIGHT DIFFERENCE
ADDITIONAL REFRIGERANT CHARGE (R410A: g)
MAX. REFRIGERANT PIPING LENGTH
PERFORMANCE CURVES
8
MU-GE50VB MUH-GE50VB

9
MUH-GE50VB
MU-GE50VB
11.6
10.6
9.6
8.6
7.7
6.9
Outdoor intake air Dry-bulb temperature
Indoor air Wet-bulb temperature
difference(degree)
Indoor intake air Wet-bulb temperature
Outdoor intake air Dry-bulb temperature
Indoor intake air Wet-bulb temperature
MUH-GE50VB
26.6
24.5
22.5
20.4
18.4
16.3
14.3
12.3
Outdoor intake air Wet-bulb temperature
Indoor air Dry-bulb temperature
difference(degree)
Indoor intake air Dry-bulb temperature
Indoor intake air Dry-bulb temperature
Outdoor intake air Wet-bulb temperature
NOTE: The above curves are for the heating operation without any frost.
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 (MUH-GE50VB)] 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

10
8-2. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT
COOL operation
Both indoor and outdoor unit are under the same temperature/humidity condition.
Air flow should be set at MAX.
Dry-bulb temperature Relative humidity(%)
20 50
25 60
30 70
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/cm2 [Gauge] )
18 32
230 V
15 20
50 25 60 30 70(%) 35(°C)
0.3
0.4
0.5
0.6
0.7
0.8
0.9
3
4
5
6
7
8
9
Outdoor low pressure
Ambient temperature (˚C)
Ambient humidity (%)
18 32
230V
15 20
50 25 60 30 70(%) 35(°C)
6
7
8
9
10
Ambient temperature (˚C)
Ambient humidity (%)
Outdoor unit current (A)
(kgf/ cm
2[Gauge])(MPa[Gauge]) MUH-GE50VB MUH-GE50VB
18 32
230V
15 20
50 25 60 30 70(%) 35(°C)
6
7
8
9
10
18 32
230V
15 20
50 25 60 30 70(%) 35(°C)
0.3
0.4
0.5
0.6
0.7
0.8
0.9
3
4
5
6
7
8
9
Outdoor low pressure
Outdoor unit current (A)
(kgf/cm2[Gauge])(MPa[Gauge])
Ambient temperature (˚C)
Ambient humidity(%) Ambient temperature (˚C) Ambient humidity(%)
MU-GE50VB MU-GE50VB