Table of Contents
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SPLIT-TYPE, AIR CONDITIONERS
OUTDOOR UNIT
SERVICE MANUAL
Wireless type
Models
MU-A08ND-
MU-A08ND-
MU-A10ND-
MU-A10ND-
MU-A12ND-
MU-A15ND-
MU-A15ND-
NOTE:
This service manual describes technical data of outdoor units.
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS Parts List.
C1
C2
C1
C2
C1
C1
C2
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································4
4. OUTLINES AND DIMENSIONS ·························5
5. WIRING DIAGRAM ············································8
6. REFRIGERANT SYSTEM DIAGRAM ················9
7. PERFORMANCE CURVES ······························12
8. TROUBLESHOOTING······································15
9. DISASSEMBLY INSTRUCTIONS ····················17
MU-A10ND
MU-A12ND
10. PARTS LIST······················································25
11. RoHS PARTS LIST···········································29
12. OPTIONAL PARTS···········································33
Revision:B
• MU-A10ND -
has been added.
C2
• RoHS PARTS LIST has been added.
Please void OB403 REVISED EDITION-A.
No. OB403
REVISED EDITION-B
Indoor unit service manual
MS-A•ND Series (OB402)
TM
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Table of Contents
Related Manuals for Mitsubishi Electric MU-A08ND-c1
Summary of Contents for Mitsubishi Electric MU-A08ND-c1
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Page 1: Table Of Contents
Revision:B SPLIT-TYPE, AIR CONDITIONERS • MU-A10ND - has been added. • RoHS PARTS LIST has been added. Please void OB403 REVISED EDITION-A. OUTDOOR UNIT No. OB403 REVISED EDITION-B SERVICE MANUAL Wireless type Models MU-A08ND- MU-A08ND- MU-A10ND- MU-A10ND- MU-A12ND- MU-A15ND- MU-A15ND- Indoor unit service manual MS-A•ND Series (OB402) CONTENTS... -
Page 2: Technical Changes
Revision A: • MU-A08ND - and MU-A15ND - have been added. Revision B: • MU-A10ND - has been added. • RoHS PARTS LIST has been added. TECHNICAL CHANGES MU-09SN - MU-A08ND - 1. Compressor has been changed. (RH-130NGDT 2R10S3R236A-6B) 2. Outdoor fan motor has been changed. (RA6N23-AA RA6N33-AA) 3. -
Page 3: Part Names And Functions
PART NAMES AND FUNCTIONS OUTDOOR UNIT MU-A10ND MU-A08ND MU-A12ND Air inlet Air inlet back and side : MU-A10ND (back and side) back : MU-A12ND Piping Piping Drain hose Drain hose Air outlet Air outlet Drain outlet Drain outlet MU-A15ND Air inlet (back and side) Piping Drain hose... -
Page 4: Specification
SPECIFICATION Outdoor model MU-A08ND MU-A10ND MU-A12ND MU-A15ND Function Cooling Single phase Power supply 220-230V, 60Hz Capacity Dehumidification Air flow K /h 1656 1896 1884 2280 Starting current Compressor motor current 2.39 3.86 4.95 5.62 Fan motor current 0.36 0.26 0.35 3.44 3.12 3.08... -
Page 5: Outlines And Dimensions
OUTLINES AND DIMENSIONS Unit : mm MU-A08ND - REQUIRED SPACE Air in OUTDOOR UNIT Air in Drainage 3 holes [33 Airout Service panel Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.35 Gas refrigerant pipe joint Refrigerant pipe (flared) [9.52 Service port Unit : mm MU-A08ND - OUTDOOR UNIT... - Page 6 Unit : mm MU-A10ND Basically open 100mm REQUIRED SPACE MU-A12ND or more without any obstruction in front and on both sides of the unit. OUTDOOR UNIT Drain hole [42 Air in Air in (MU-A 10ND) Open two sides of left, 2 holes 10X21 right, or rear side.
- Page 7 Unit : mm MU-A15ND - OUTDOOR UNIT REQUIRED SPACE Drainage hole [16.2 Air in Air in Drainage Air out 3 holes [33 Service panel Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.35 Gas refrigerant pipe joint Refrigerant pipe (flared) [12.7 Service port...
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Page 8: Wiring Diagram
WIRING DIAGRAM MU-A08ND 4 51C 220-230V 220-230V GRN/YLW SYMBOL NAME SYMBOL NAME SYMBOL NAME COMPRESSOR CAPACITOR FUSE (20A) TERMINAL BLOCK TB1,TB2 OUTDOOR FAN CAPACITOR COMPRESSOR (OUTER PROTECTOR) OVERCURRENT RELAY FUSE (3.15A) OUTDOOR FAN MOTOR (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. -
Page 9: Refrigerant System Diagram
MU-A15ND 220-230V~ 220-230V~ GRN/YLW SYMBOL NAME SYMBOL NAME SYMBOL NAME COMPRESSOR CAPACITOR FUSE (3.15A) OUTDOOR FAN MOTOR (INNER PROTECTOR) OUTDOOR FAN CAPACITOR COMPRESSOR (INNER PROTECTOR) TERMINAL BLOCK TB1,TB2 NOTE:1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing. 2.Use copper conductors only. - Page 10 MU-A10ND Unit: mm Refrigerant pipe (Option){9.52 Stop valve (with service port) (with heat insulator) Outdoor Flared heat connection exchanger Compressor Strainer #100 Flared connection Capillary tube Stop valve {3.0 x { 1.6 x 500 (MU-A10ND - Refrigerant pipe {3.0 x { 1.6 x 850 (MU-A10ND - (Option){6.35 (with heat insulator) Refrigerant flow in cooling...
- Page 11 MU-A15ND Unit: mm Refrigerant pipe Stop valve (Option) [12.7 (with service port) (with heat insulator) Outdoor heat Flared connection exchanger Compressor Strainer #100 Flared connection Stop valve Muffler Capillary tube [3.0x[1.8x700 Refrigerant pipe (Option) [6.35 (with heat insulator) Refrigerant flow in cooling...
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Page 12: Performance Curves
MAX.REFRIGERANT PIPING LENGTH Refrigerant piping : m Piping size O.D : mm Model Max. length Max. height Liquid MU-A08ND {9.52 MU-A10ND {6.35 MU-A12ND {12.7 MU-A15ND MAX.HEIGHT DIFFERENCE Indoor unit Max. Height Refrigerant Piping Max. Length Outdoor unit ADDITIONAL REFRIGERANT CHARGE(R22 : g) Refrigerant piping length (one way) Outdoor unit precharged Model... - Page 13 How to measure the indoor air wet/dry-bulb temperature difference 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.
- Page 14 MU-A08ND MU-A08ND (kgf/F[Gauge])(MPa[Gauge]) 220V 220V 18 20 35(:) 18 20 35(:) Ambient temperature(˚C) Ambient humidity(%) Ambient temperature(˚C) Ambient humidity(%) MU-A10ND MU-A10ND (kgf/F[Gauge])(MPa[Gauge]) 220V 220V 35(:) 35(:) Ambient temperature(˚C) Ambient humidity(%) Ambient temperature(˚C) Ambient humidity(%) MU-A12ND MU-A12ND (kgf/F[Gauge])(MPa[Gauge]) 220V 220V 35(:) 35(:) Ambient temperature(˚C) Ambient humidity(%) Ambient temperature(˚C) Ambient humidity(%)
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Page 15: Troubleshooting
TROUBLESHOOTING MU-A08ND MU-A10ND MU-A12ND MU-A15ND 8-1. 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. - Page 16 8-3. Trouble criterion of main parts MU-A08ND MU-A10ND MU-A12ND MU-A15ND Part name Check method and criterion Figure Compressor (MC) OVERCURRENT MU-A08ND RELAY MU-A08ND Measure the resistance between the terminals with a tester. 150i 5: OPEN AUX. MAIN (Coil wiring temperature -10°C ~ 40°C) 78i 9: CLOSE INNER Normal...
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Page 17: Disassembly Instructions
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. - Page 18 OPERATING PROCEDURE PHOTOS Outdoor fan Compressor Photo 4 2. Removing the electrical parts capacitor (C2) capacitor (C1) (1) Remove the service panel and the cabinet.(Refer to 1.) (2) Remove the following parts. •Compressor capacitor (C1) •Outdoor fan capacitor (C2) •Terminal block (TB) Lead clamp Terminal block...
- Page 19 9-2. MU-A10ND OUTDOOR UNIT OPERATING PROCEDURE PHOTOS Photo 1 1. Removing the cabinet (1) Remove the screws fixing the top panel. Screws of the front panel and motor support (2) Remove the top panel. (3) Remove the screw fixing the service panel. (4) Pull down the service panel and remove it.
- Page 20 OPERATING PROCEDURE PHOTOS 3. Removing the propeller and the outdoor fan motor Photo 5 (1) Remove the cabinet. (Refer to 1.) Outdoor fan motor lead wires Set screws of the (2) Remove the propeller nut and the propeller. outdoor fan motor Hook NOTE : Loose the propeller in the rotating direction for removal.
- Page 21 9-3. MU-A12ND OUTDOOR UNIT OPERATING PROCEDURE PHOTOS Photo 1 1. Removing the cabinet (1) Remove the screws fixing the top panel. Screws of the front panel and motor support (2) Remove the top panel. (3) Remove the screw fixing the service panel. (4) Pull down the service panel and remove it.
- Page 22 OPERATING PROCEDURE PHOTOS 3. Removing propeller and the outdoor fan motor Photo 5 Outdoor fan motor lead wires (1) Remove the cabinet. (Refer to 1.) Set screws of the (2) Remove the propeller nut and remove the propeller. outdoor fan motor NOTE : Loose the propeller in the rotating direction for Hook Relay panel...
- Page 23 9-4. MU-A15ND OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screws of the cabinet. Screws (2) Hold the bottom of the cabinet on both sides and remove of the the cabinet. cabinet (3) Remove the screws of the service panel and remove the service panel.
- Page 24 OPERATING PROCEDURE PHOTOS 4. Removing the compressor Photo 5 (1) Remove the cabinet. (Refer to 1.) (2) Remove the terminal cover on the compressor. (3) Remove the electrical assembly. (Refer to 2.) (4) Remove the soundproof felt. (5) Recover gas from the refrigerant circuit. NOTE : Recover gas from the pipes until the pressure gauge shows 0 kg/cm...
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Page 25: Parts List
PARTS LIST (non-RoHS compliant) MU-A08ND 10-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol Part No. Part name in Wiring Remarks MU-A08ND- MU-A08ND- Diagram E02 815 297 TOP PANEL E02 336 515 MOTOR SUPPORT... - Page 26 PARTS LIST (non-RoHS compliant) MU-A10ND MU-A12ND 10-2. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS This figure shows MU-A12ND.
- Page 27 PARTS LIST (non-RoHS compliant) MU-A10ND MU-A12ND 10-2. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol Part Name Remarks Part No. in Wiring MU-A10ND- MU-A12ND- Diagram E02 903 232 CABINET E02 899 232 CABINET...
- Page 28 PARTS LIST (non-RoHS compliant) MU-A15ND 10-3. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty / unit Symbol Remarks in Wiring Part No. Part Name MU-A15ND- MU-A15ND- Diagram E02 817 233 BACK PANEL E02 A27 233...
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Page 29: Rohs Parts List
RoHS PARTS LIST (RoHS compliant) MU-A08ND 11-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol Part name Part No. in Wiring Remarks MU-A08ND- MU-A08ND- Diagram E12 815 297 TOP PANEL E12 336 515 MOTOR SUPPORT... - Page 30 RoHS PARTS LIST (RoHS compliant) MU-A10ND MU-A12ND 11-2. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS This figure shows MU-A12ND.
- Page 31 RoHS PARTS LIST (RoHS compliant) MU-A10ND MU-A12ND 11-2. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol Part Name Remarks Part No. in Wiring MU-A10 MU-A10 MU-A12 Diagram E12 903 232 CABINET...
- Page 32 RoHS PARTS LIST (RoHS compliant) MU-A15ND 11-3. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty / unit Symbol Part No. Remarks in Wiring Part Name MU-A15ND- MU-A15ND- Diagram E12 817 233 BACK PANEL...
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Page 33: Optional Parts
OPTIONAL PARTS REFRIGERANT PIPES The air conditioner has flared connections its indoor and outdoor sides. Please use the optional extension pipe as follows. Pipe size O.D mm (in.) Model Part No. Pipe length Cross-section Insulation A-Gas B-Liquid MU-A08ND- MU-A08ND- MAC-MS0905F 9.52 (3/8) MU-A10ND- MU-A10ND-... - Page 36 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD. Distributed in Jul. 2007. No.OB403 REVISED EDITION-B 7 Distributed in Oct. 2005. No.OB403 REVISED EDITION-A 6 Reprinted in Apr. 2005. No.OB403 100 Distributed in Apr.