Table of Contents
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SPLIT-TYPE AIR CONDITIONERS
OUTDOOR UNIT
SERVICE MANUAL
Wireless type
Models
MU-A09WA
MU-A12WA
MU-A12WA-
NOTE:
This service manual describes technical data of the 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 (RoHS compliant).
1
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················5
3. SPECIFICATION·················································6
4. OUTLINES AND DIMENSIONS ·························8
5. WIRING DIAGRAM ············································9
MU-A09WA
6. REFRIGERANT SYSTEM DIAGRAM ··············10
7. DATA·································································12
8. TROUBLESHOOTING······································16
9. DISASSEMBLY INSTRUCTIONS ····················17
10. PARTS LIST······················································22
MU-A12WA
Revision : A
MU-A12WA-
Please void OB449.
HFC
REVISED EDITION-A
utilized
R410A
Indoor unit service manual
MS-A•WA Series (OB448)
10-1. PARTS LIST·············································22
10-2. RoHS PARTS LIST ··································24
has been added.
1
No. OB449
TM
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Related Manuals for Mitsubishi Electric MU-A09WA
Summary of Contents for Mitsubishi Electric MU-A09WA
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Page 1: Table Of Contents
Please void OB449. OUTDOOR UNIT No. OB449 SERVICE MANUAL REVISED EDITION-A utilized R410A Wireless type Models MU-A09WA MU-A12WA MU-A12WA- Indoor unit service manual MS-A•WA Series (OB448) CONTENTS 1. TECHNICAL CHANGES ····································2 2. PART NAMES AND FUNCTIONS······················5 3. SPECIFICATION·················································6 4. OUTLINES AND DIMENSIONS ·························8 5. -
Page 2: Technical Changes
Revision : A • MU-A12WA- has been added. TECHNICAL CHANGES MU09TW MU-A09WA MU12TN MU-A12WA 1.Outdoor unit model has been changed. 2.Refrigerant has been changed. (R22 R410A) 3.Compressor has been changed. MUA12WA MU-A12WA- 1.WIRING DIAGRAM has been changed. INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT •... - Page 3 New Specification Current Specification The incompatible refrigeration oil easily separates from Since refrigerant and refrigeration oil are compatible each, refrigerant and is in the upper layer inside the suction muffler. refrigeration oil goes back to the compressor through the Raising position of the oil back hole enables to back the lower position oil back hole.
- Page 4 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. Description R410A tools Can R22 tools be used? R410A has high pressures beyond the measurement range of existing Gauge manifold gauges.
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Page 5: Part Names And Functions
Gauge manifold valve (for R410A) Charge hose (for R410A) Refrigerant gas cylinder for R410A with siphon Refrigerant (liquid) Electronic scale for refrigerant charging PART NAMES AND FUNCTIONS MU-A09WA MU-A12WA Air inlet Air inlet (back and side) (back and side) Piping Piping... -
Page 6: Specification
Rated(Minimum~Maximum) Power consumption Cooling 1,070 Rated(Minimum~Maximum) [SEER] Cooling 10.9 [13.0] 11.2 [13.0] OUTDOOR UNIT MODEL MU-A09WA MU-A12WA External finish Munsell 3Y 7.8/1.1 115, 1, 60 Power supply V, phase, Hz Max. fuse size (time delay) Min. circuit ampacity F.L.A Fan motor 0.63... -
Page 7: Operating Range
(Unit : [˚F]) Indoor air condition Outdoor air condition Mode Test Wet bulb Wet bulb Dry bulb Dry bulb SEER "A" Cooling Steady State (75) (Cooling) at rated compressor Speed "B-2" Cooling Steady State (65) at rated compressor Speed "B-1" Cooling Steady State (65) at minimum compressor Speed Low ambient Cooling Steady State... -
Page 8: Outlines And Dimensions
OUTLINES AND DIMENSIONS MU-A09WA Unit : inch REQUIRED SPACE Basically open 4inch or more without any obstruction in front 15-3/4 Drainage hole 1-5/8 and on both sides of the unit. Air in Air in 1-9/16 Air out 2- 3/8o13/16 Oval hole... -
Page 9: Wiring Diagram
WIRING DIAGRAM MU-A09WA MU-A12WA... -
Page 10: Refrigerant System Diagram
MU-A12WA- REFRIGERANT SYSTEM DIAGRAM MU-A09WA Unit : inch (mm) Refrigerant pipe Stop valve {3/8 (with heat insulator) (with service port) Muffler Outdoor Flared Service port Service port heat connection exchanger Compressor Strainer #100 Flared connection Capillary tube Stop valve O.D. 0.118 I.D. - Page 11 Model Minimum Minimum Outside Max. length Max. length Outside Wall Wall diameter diameter thickness thickness [ 3/8 MU-A09WA 0.0315 [ 1/4 0.0315 [ 1/2 MU-A12WA MAX. HEIGHT DIFFERENCE Indoor unit Additional Piping Max. Height Max. length difference Outdoor unit ADDITIONAL REFRIGERANT CHARGE(R410 : oz.)
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Page 12: Data
DATA MS-A09WA MS-A12WA 7-1. PERFORMANCE DATA 1) COOLING CAPACITY Outdoor intake air DB temperature ( ˚F ) Indoor air Model ( ˚F ) 11.6 0.77 10.9 0.85 10.2 0.91 0.96 1.00 MS-A09WA 11.0 0.73 10.3 0.80 0.87 0.92 0.97 10.4 0.70 0.77 0.83... - Page 13 7-3. Condensing pressure Data is based on the condition of indoor humidity 50%. Air flow should be set at High. A point on the curve shows the reference point. MU-A09WA (PSIG) (PSIG) 105( F) 105( F) Outdoor ambient temperature Outdoor ambient temperature...
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Page 14: Standard Operation Data
Power supply (V, phase, Hz) 115, 1, 60 Input 0.019 0.035 0.51 Fan motor current 0.27 Electrical OUTDOOR UNIT MODEL MU-A09WA MU-A12WA circuit Power supply (V, phase, Hz) 115, 1, 60 115, 1, 60 Input 0.851 1.035 Comp. current 7.96 6.74... - Page 15 7-5. OPERATING RANGE (1) POWER SUPPLY Rating Guaranteed Voltage Min. 103V 115V Max. 127V Outdoor unit 115V 60Hz 1[ (2) OPERATION Intake air Indoor Outdoor temperature Function DB (˚F) WB (˚F) DB (˚F) WB (˚F) Condition Standard temperature — Maximum temperature —...
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Page 16: Troubleshooting
TROUBLESHOOTING MU-A09WA MU-A12WA 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 confirming the horizontal vane is closed, turn OFF the breaker and / or disconnect the power plug. -
Page 17: Disassembly Instructions
Locking lever lever. Connector 9-1. MU-A09WA OPERATING PROCEDURE PHOTOS Photo 1 1. Removing the cabinet. (1) Remove the screw fixing the service panel. (2) Pull down the service panel and remove it. - Page 18 OPERATING PROCEDURE PHOTOS Photo 3 2. Removing the electrical parts (1) Remove the service panel and the cabinet.(Refer to 1.) Compressor capacitor (C1) (2) Remove the following parts. Compressor contactor (52C) •Compressor capacitor (C1) •Outdoor fan capacitor (C2) •Terminal block (TB1,TB2) •Surge absorber (DSAR) •Compressor contactor (52C) Terminal...
- Page 19 OPERATING PROCEDURE PHOTOS 4. Removing the compressor Photo 5 (1) Remove the cabinet. (Refer to 1.) Suction pipe (2) Remove the relay panel. (3) Remove the soundproof felt. Discharge pipe (4) Remove the terminal cover on compressor. (5) Disconnect lead wires from the glass terminal of the com- pressor.
- Page 20 9-2. MU-A12WA OPERATING PROCEDURE PHOTOS 1. Removing the cabinet (1) Remove the screws of the cabinet. Photo 1 (2) Hold the bottom of the cabinet on the both side to remove the cabinet. (3) Remove the the cabinet. Screws of the cabinet Photo 2 Conduit plate...
- Page 21 OPERATING PROCEDURE PHOTOS Hook Lead clamp 3. Removing propeller and the outdoor fan motor Photo 4 (1) Remove the cabinet. (Refer to 1) Connector (2) Remove the propeller nut and remove the propeller. NOTE : Loose the propeller in the rotating direction for removal.
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Page 22: Parts List
PARTS LIST 10-1. PARTS LIST (non-RoHS compliant) MU-A09WA 1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part number that is circled is not shown in the illustration. Q'ty/unit Symbol Part No. in Wiring Part name Remarks MU-A09WA Diagram... - Page 23 MU-A12WA 2. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part number that is circled is not shown in the illustration. Q'ty/unit Symbol Part No. Part name Remarks in Wiring MU-A12WA Diagram BACK PANEL E02 A50 233 E02 817 232 CABINET E02 817 521 GRILLE...
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Page 24: Rohs Parts List
10-2. RoHS PARTS LIST (RoHS compliant) MU-A09WA 1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part number that is circled is not shown in the illustration. Q'ty/unit Symbol Part No. in Wiring Part name Remarks MU-A09WA Diagram E12 A49 630... - Page 25 MU-A12WA 2. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part number that is circled is not shown in the illustration. Q'ty/unit Symbol Part No. Part name Remarks in Wiring MU-A12WA MU-A12WA- Diagram E12 A50 233 BACK PANEL E12 817 232 CABINET E12 817 521 GRILLE...
- Page 28 C C Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD. New publication, effective May 2006 Distributed in May 2006. No.OB449 REVISED EDITION-A 7 Specifications subject to change without notice. Distributed in Mar. 2006. No.OB449 7...
- Page 29 3400 Lawrenceville Suwanee Road ● Suwanee, Georgia 30024 ● Toll Free: 800-433-4822 Toll Free Fax: 800-889-9904 www.mrslim.com Specifications are subject to change without notice.
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