Mitsubishi Electric MUH-GD80VB User manual

CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 2
3. SPECIFICATION················································ 3
4. NOISE CRITERIA CURVES······························ 3
5. OUTLINES AND DIMENSIONS ························ 4
6. WIRING DIAGRAM············································ 4
7. REFRIGERANT SYSTEM DIAGRAM··············· 5
8. PERFORMANCE CURVES······························· 6
9. ACTUATOR CONTROL··································· 10
10. SERVICE FUNCTIONS·····································11
11. TROUBLESHOOTING······································11
12. DISASSEMBLY INSTRUCTIONS···················· 18
SERVICE MANUAL
Wireless type
Model
MUH-GD80VB - E1
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
HFC
utilized
R410A
OUTDOOR UNIT No. OBH514
Indoor unit service manual
MSH-GD•VB Series (OBH513)
PARTS CATALOG (OBB514)

2
TECHNICAL CHANGES
1
MUH-GD80VB - E1
1. New model
PART NAMES AND FUNCTIONS
2
Air inlet
Air outlet
(back and side)
ACCESSORIES
Drain socket
Drain cap 33
Drain cap 16
1
2
—
MUH-GD80VB
MUH-GD80VB

3
SPECIFICATION
3
Outdoor model MUH-GD80VB
Function Cooling Heating
Power supply Single phase
230 V, 50 Hz
Capacity kW 8.0 9.4
Electrical
data
Breaker capacity A 25
Running current (Total) A 14.76 15.90
Power input (Total) W 3,320 3,580
Power factor (Total) % 98
Starting current (Total) A90
Coefficient of performance (C.O.P) (Total) 2.41 2.63
Compressor
Model NN37VAAHT
Output W 2,500
Compressor motor current A 13.85 14.62
Fan
motor
Model RA6V75-AD
Fan motor current A 0.57
Dimensions W H D mm 840 850 330
Weight kg 77
Special
remarks
Dehumidification /h 4.6 -
Air flow (High/Low) /h 2,940/1,470
Sound level (High/Low) dB 55/53
Fan speed (High/Low) rpm 805/435
Fan speed regulator 2
Refrigerant filling
capacity (R410A) kg 2.40
Refrigeration oil (Model) 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 15.5°C
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C
Indoor-Outdoor piping length: 5 m
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
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
55
SPL(dB(A)) LINE
High
FAN SPEED
Test conditions,
Cooling : Dry-bulb temperature 35 Wet-bulb temperature 24
Heating : Dry-bulb temperature 7 Wet-bulb temperature 6
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
NOISE CRITERIA CURVES
4
MUH-GD80VB
OUTDOOR UNIT
MICROPHONE
1m

4
30º
35º
155
90
198
40
515
299
66
34
51
330
360
850
430
500
80
121
840
Open as a rule
500 mm or more if
the front and both
sides are open
100 mm or more
200 mm or more if
there are obstacles
to both sides
Open as a rule
500 mm or more if the back,
both sides and top are open 350 mm or more
100 mm or more
Service panel
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) 15.88
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) 9.52
REQUIRED SPACE
MUH-GD80VB
OUTLINES AND DIMENSIONS
5
Unit: mm
WIRING DIAGRAM
6
MUH-GD80VB

5
REFRIGERANT SYSTEM DIAGRAM
7
Unit: mm
MUH-GD80VB
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe 15.88
(with heat insulator)
Capillary tube
3.6 2.4 50
Refrigerant pipe 9.52
(with heat insulator)
LEV
R.V. coil
heating ON
cooling OFF
Muffler
#100
Strainer
#100
Receiver
Muffler
Ambient
temperature
thermistor
RT63
Strainer
#100
MAX. REFRIGERANT PIPING LENGTH
Piping size O.D: mm
Refrigerant piping: m
Max. length
A
Max. height
BGas Liquid
30
MUH-GD80VB 9.52
15 15.88
Model
Indoor
unit
Outdoor unit
Max. length
A
Max. Height
difference
B
MAX. HEIGHT DIFFERENCE
ADDITIONAL REFRIGERANT CHARGE (R410A: g)
Outdoor unit
precharged
2,400
0 165 440 715 990 1,265
Refrigerant piping length (one way)
15 m10 m7 m
Model
MUH-GD80VB
20 m 25 m 30 m
Calculation: Xg = 55 g/m (Refrigerant piping length (m) - 7)