Mitsubishi Electric MU-GD15ND User manual
SERVICE MANUAL
Wireless type
Models
No. TBH017
OUTDOOR UNIT
Indoor unit service manual
MS-GD•ND Series (TBH015)
MU-GD15ND- C1
MU-GD18ND- C1
MU-GD24ND- C1
MU-GD15ND- C1
MU-GD18ND- C1
TECHNICAL CHANGES.....................................
PART NAMES AND FUNCTIONS......................
SPECIFICATION................................................
OUTLINES AND DIMENSIONS.........................
WIRING DIAGRAM............................................
REFRIGERANT SYSTEM DIAGRAM................
PERFORMANCE CURVES...............................
TROUBLESHOOTING.......................................
DISASSEMBLY INSTRUCTIONS.....................
2
3
3
4
5
7
9
12
16
1.
2.
3.
4.
5.
6.
7.
8.
9.
CONTENTS
PARTS CATALOG (TBB017)
NOTE:
• RoHS compliant products have <G> mark on the spec name plate.
2
TECHNICAL CHANGES
1
MU-A15ND- C1 ➔ MU-GD15ND- C1
MU-A18ND- S1 ➔ MU-GD18ND- C1
1. Outdoor unit model has been changed.
• Dimension has been changed. (850Wx605Hx290D 800Wx550Hx285D)
2. Compressor has been changed. (RH207NRAT RH189NRAT)
3. Outdoor fan motor has been changed. (RA6V60-MA RA6V33-MC)
4. Compressor capacitor has been changed.
5. Fan motor capacitor has been changed.
6. Condenser has been changed.
1. Outdoor unit model has been changed.
• Dimension has been changed. (850Wx605Hx290D 800Wx550Hx285D)
2. Outdoor fan motor has been changed. (RA6V60-MA RA6V33-MC)
3. Compressor capacitor has been changed.
4. Condenser has been changed.
MU-A24ND- S1 ➔ MU-GD24ND- C1
1. Compressor has been changed. (PH33NPBT PH36NPBT)
2. Outdoor fan motor has been changed. (RA6N75-BA RA6V85-CA)
3. Fan motor capacitor has been changed.
4. Condenser has been changed.
3
Outdoor model MU-GD15ND- C1 MU-GD18ND- C1 MU-GD24ND- C1
Funtion Cooling
Power supply Single phase
220-230V, 60Hz
Capacity
Capacity kW 4.1-4.1 5.0-5.0 6.6-6.6
Dehumidification R/h 0.43 1.2 2.4
Air flow K/h 2,106-2,124 2,772-2,892
Electrical data
Power outlet A 15 15 20
Running current (total) A 6.0-6.0 8.3-8.3 11.1-11.1
Power input (total) W 1,280-1,280 1,765-1,770 2,375-2,375
Power factor (total) % 97-93 97-93 97-93
Starting current A 40.0 45.0 67.0
Compressor motor current A 5.26-5.25 7.56-7.55 10.17-10.15
Fan motor current A 0.37-0.38 0.37-0.38 0.56-0.58
Coefficient of performance (C.O.P) 3.20-3.20 2.83-2.82 2.78-2.78
Compressor
Model RH189NRAT RH247NRAT PH36NPBT
Output W 900 1,200 1,600
Winding
resistance (at 20°C) "C-R 1.50
C-S 2.33
C-R 1.43
C-S 2.06
C-R 0.76
C-S 1.88
Fan
motor
Model RA6V33-MC RA6V85-CA
Winding
resistance (at 20°C) "WHT-BLK 141
BLK-RED 175
WHT-BLK 86
BLK-RED 92
Dimensions WxHxD mm 800 x 550 x 285 840 x 850 x 330
Weight kg 35 34 61
Special
remarks
Sound level dB 52-52 54-54 54-54
Fan speed rpm 980-990 750-780
Fan speed regulator 1
Refrigerant filling
capacity (R22) kg 1.25 1.40 1.65
Refrigeration oil (Model) cc 520 (NM56) 900 (NM56)
2
MU-GD15ND
MU-GD18ND
MU-GD24ND
SPECIFICATION
3
OUTDOOR UNIT
PART NAMES AND FUNCTIONS
NOTE: Test conditions are based on CNS 14464
Cooling : Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Outdoor Dry-bulb temperature 35°C Wet-bulb temperature 24°C
Refrigerant piping length(one way) 7.5 m
4
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4
MU-GD15ND
MU-GD18ND
MU-GD24ND
OUTDOOR UNIT
OUTDOOR UNIT
OUTLINES AND DIMENSIONS
( MU-GD15ND- C1
)
( MU-GD18ND- C1
)
Unit : mm
Unit : mm
5
5
MU-GD15ND
OUTDOOR UNIT
MU-GD18ND
OUTDOOR UNIT
WIRING DIAGRAM
6
MU-GD24ND
OUTDOOR UNIT
7
6REFRIGERANT SYSTEM DIAGRAM
MU-GD15ND
MU-GD18ND
OUTDOOR UNIT
MU-GD24ND
OUTDOOR UNIT
( MU-GD15ND- C1
)
( MU-GD18ND- C1
)
MU-GD15ND- C1
({3.0x{1.8x700)
MU-GD18ND- C1
({3.0x{1.8x450)
({3.0x{2.0x300)
8
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MU-GD15ND-
C1
MU-GD18ND-
C1
MU-GD24ND-
C1
MU-GD15ND-
C1
MU-GD18ND-
C1
MU-GD24ND-
C1
9
7PERFORMANCE CURVES
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MU-GD15ND MU-GD18ND MU-GD24ND
MS-GD15ND-
C1
MU-GD15ND-
C1
MS-GD18ND-
C1
MU-GD18ND-
C1
MS-GD24ND-
C1
MU-GD24ND-
C1
10
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MU-GD15ND
MU-GD18ND
MU-GD15ND
MU-GD18ND
11
MU-GD24ND MU-GD24ND
12
TROUBLESHOOTING
8
MU-GD15ND MU-GD18ND MU-GD24ND
13
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8-2. Instruction of troubleshooting
14
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MU-GD15ND MU-GD18ND MU-GD24ND
8-3. Trouble criterion of main parts
MU-GD15/
GD18ND- C1
126i2°C OPEN
Color of
lead wire
Normal
MU-GD15ND- C1 MU-GD18ND- C1 MU-GD24ND- C1
C – R
1.32 " ~ 1.62 " 1.26 " ~ 1.55 " 0.67 " ~ 0.82 "
C – S
2.05 " ~ 2.52 " 1.81 " ~ 2.23 " 1.65 " ~ 2.03 "
Color of
lead wire
Normal
MU-GD15/GD18ND- C1
WHT-BLK
124 " ~ 153 "
BLK-RED
154 " ~ 189 "
Color of
lead wire
Normal
MU-GD24ND- C1
WHT-BLK
75 " ~ 93 "
BLK-RED
81 " ~ 100 "
15
Compressor and / or outdoor fan motor doesn’t stop.
8-4. Troubleshooting flow
16
DISASSEMBLY INSTRUCTIONS
9
OPERATING PROCEDURE PHOTOS
1. Removing the cabinet
(1) Remove the screws fixing the top panel. (See Photo 2 and
3.)
(2) Remove the top panel. (See Photo 3.)
(3) Remove the screw fixing the service panel. (See Photo 3.)
(4) Pull down the service panel and remove it. (See Photo 3.)
(5) Remove the screws fixing the cabinet.
(6) Remove the cabinet.
(7) Disconnect the indoor/outdoor connecting wire.
(8) Remove the screws fixing the back panel.
(9) Remove the back panel.
Photo 1
Screws of the cabinet
Screws of the front panel and motor support
Photo 3 Screws of the
top panel
Service
panel
Screw of the
cabinet
Direction
to remove
Hooks
Screw of the
service panel
Screws of
the cabinet
Photo 2
Screws of the
top panel
MU-GD15ND
MU-GD18ND
9-1.
OUTDOOR UNIT
17
PHOTOS
Photo 6
Photo 5
OPERATING PROCEDURE
3. Removing propeller and the outdoor fan motor
(1) Remove the cabinet. (Refer to 1.)
(2) Remove the propeller nut and 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.
(3) Disconnect the connector and remove the lead clamps and
outdoor fan motor lead wires.
(4) Remove the screws fixing the outdoor fan motor.
(5) Remove the outdoor fan motor.
4. Removing the compressor
(1) Remove the cabinet. (Refer to 1.)
(2) Remove the relay panel.
(3) Remove the soundproof felt.
(4) Remove the terminal cover.
(5) Pull out the 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(0MPa).
(7) Disconnect the welded part of the suction pipe and dis-
charge pipe.
(8) Remove the nuts fixing the compressor and the compres-
sor.
Glass
terminal Discharge
pipe
Suction
pipe
Compressor nuts
(3 places)
Compressor
Propeller
Propeller
nut
Outdoor
fan motor
Set screws of the
outdoor fan motor Hook Relay panel
Outdoor fan motor lead wires
Set screws of the
outdoor fan motor
18
19
MU-GD24ND
9-2.
OUTDOOR UNIT
20
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2
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