SERVICE MANUAL MU-A09WA MU-A12WA MU-A12WA- 1
Contents
1. FUSE We oy C TT MF TEN COMEN NRE 52C Fron INDOOR w N IF FUSE COMPRESSOR CONTACTOR NOTES TB1 About the indoor side electric wiring I refer to the indoor unit electric wiring POWER SUPPLY Li diagram for servicing 1 phase 60Hz 2 Use copper conductors only for field wiring 3 Symbols below indicate Q Terminal block LTTJ Connector MU A12WA TO INDOOR UNIT ONES WIRES 1 phase 60Hz From INDOOR UNIT CONNECTING WRES TV 1 phase 60Hz From MDOOR INT 7 S CONNECTING WRES c FUSE BOARD 1 NOTES About the indoor side electric wiring COMPRESSOR CAPACITOR refer to the indoor unit electric wiring diagram for servicing SURGE ABSORBER 2 Use co ductors only For field wiri OOC 3 Symbols below indicate F21 F22 FUSE AC250V 20A Terminal block COL Connector TE2 TERMINALBLOCK Cd MU A12WA ET TO INDOOR UNIT CONNECTING WIRES 115 1 phase 60Hz From INDOOR UNIT CONNECTING WRES 1 phase 60Hz From INDOOR UNT e COMPRESSOR INNER PROTECTOR CONNECTING WIRES Mc COMPRESSOR INNER PROTECTOR NOTES 1 About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 8 3 Symbols below indicate Terminal block CTTT Connector POWER SUPPLY 115V 1 phase 60Hz um O 6 REFRIGERANT SYSTEM DI2. G G G G G G G G G G G G IG G 383 SURGE ABSORBER 25 1 1 1 1 1 1 3 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 26 27 SLUM a MITSUBISHI ELECTRIC CORPORATION Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in May 2006 No OB449 REVISED EDITION A 7 Distributed in Mar 2006 No OB449 7 New publication effective May 2006 Specifications subject to change without notice MITSUBISHI ELECTRIC HVAC Advanced Products Division 3400 Lawrenceville Suwanee Road e Suwanee Georgia 30024 Toll Free 800 433 4822 e Toll Free Fax 800 889 9904 www mrslim com Specifications are subject to change without notice
3. cause the compressor to be locked Thus charge the refrigerant slowly Indoor unit Refrigerant gas cylinder operating valve Union Stop valve Liquid pipe Outdoor unit Service port N Gauge manifold valve for R410A Refrigerant gas cylinder for R410A with siphon Refrigerant liquid Electronic scale for refrigerant charging 2 PART NAMES AND FUNCTIONS MU A09WA MU A12WA Air inlet back and side Air inlet back and side OF Air outlet S CD m 38 Dan RT Drain outlet Drain outlet Item MS A09WA 3 SPECIFICATION MS A12WA Capacity Rated Minimum Maximum Cooling i 9 500 12 000 Power consumption Rated Minimum Maximum Cooling 870 1 070 EER 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 Power supply 115 1 60 V phase Hz A Max fuse size time delay 15 20 Min circuit ampacity A 14 16 Fan motor F L A 0 63 0 926 Model RNO92WHDHT RN110WHDHT Winding resistance at 68 F C R 0 81 C S 1 49 C R 0 66 C S 1 23 Compressor RLA 9 30 10 82 L R A 47 56 Refrigerant control Capillary tube Sound level
4. temperature 67 67 57 59 Discharge air temperature 56 58 Fan speed High 1160 1220 Airflow High 300 Wet 363 Wet 95 95 Intake air temperature Outdoor unit Fan speed Airflow 14 7 5 OPERATING RANGE 1 POWER SUPPLY ecce Rating Guaranteed Voltage Outdoor unit 115V 60Hz 19 Min 103V TTU 127V 2 OPERATION Intake od erat re Indoor Outdoor Function p Condition Standard temperature Maximum temperature Cooling Minimum temperature Maximum humidity 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 2 Be sure to turn OFF the power supply before removing the front panel the cabinet the top panel and the electronic control P C board 3 When removing the electronic control P C board hold the edge of the board with care NOT to apply stress on the components X 4 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead w
5. 009 HANDLE 134 936 CAPILLARY TUBE 890 SURGE ABSORBER RN110WHDHT 3RUBBERS SET RN 112 81 4 1PCE SET 2P 3P 75yF 220V AC 9 5uF 250V AC RA6W504 O D 0 118 X I D 0 063 X 27 9 16 23 Oe 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 Part No Part name Symbol in Wiring Diagram Q ty unit MU A09WA Remarks E12 A49 630 OUTDOOR HEAT EXCHANGER E12 OUTDOOR FAN MOTOR MF RA6W26 E12 PROPELLER E12 CABINET E12 GRILLE OUT E12 BASE E12 COMPRESSOR RUBBER SET 3RUBBERS SET COMPRESSOR RNO92WHDHT o 4A STOP VALVE GAS 63 8 STOP VALVE LIQUID 21 4 BACK PANEL SERVICE PANEL TERMINAL BLOCK 3P TERMINAL BLOCK 2P OUTDOOR FAN CAPACITOR 7 0uF 250VAC COMPRESSOR CAPACITOR 70uF 220VAC COMPRESSOR CONTACTOR SERVICE PORT 1PCE SET SEPARATOR CONDENSER NET MOTOR SUPPORT TOP PANEL CAPILLARY TUBE O D 0 118 x I D 0 055x21 21 32 e I e G G G G G G G G G G G G G G G G G G G G G G G SURGE ABSORBE
6. 47 52 31 1 2 33 7 16 Dimensions 11 1 4 11 7 16 21 5 8 23 13 16 Weight 78 96 REMOTE CONTROLLER Wireless type REFRIGERANT PIPING Not supplied Refrigerant pipe size Liquid 1 4 0 0315 Min wall thickness Gas 3 8 0 0315 1 2 0 0315 Connection method doen Flared Outdoor Between the indoor Height difference amp outdoor units Piping length Refrigerant charge R410A 3lb 10z Refrigerating oil Model NOTE Test conditions are based on ARI 210 240 350 NE022 3 amp 1 Rating conditions cooling Indoor 80 FDB 67 FWB Outdoor 95 FDB 75 FWB 2 Unit F Indoor air condition Outdoor air condition Dry bulb Wet bulb Dry bulb Wet bulb Test SEER A Cooling Steady State Cooling at rated compressor Speed 80 67 95 75 B 2 Cooling Steady State at rated compressor Speed 80 67 82 65 B 1 Cooling Steady State at minimum compressor Speed 80 67 82 65 Low ambient Cooling Steady State at minimum compressor Speed 80 67 67 53 5 Intermediate Cooling Steady State At Intermediate compressor Speed 80 67 87 69 Operating Range Indoor intake air temperature Outdoor intake air temperature Maximum 95 FDB 71 FWB 115 FDB Cooling Minimum 67 FDB 57FWB 67 FDB 4 OUTLINES AN
7. AGRAM MU A09WA Unit inch mm Refrigerant pipe 23 8 Stop valve with heat insulator with service port ll Flared gt Outdoor Service port Service port heat connection exchanger Compressor Flared connection N zH Stop valve Capillary tube Refrigerant pipe O D 0 118 x I D 0 055 x 21 21 32 Option g1 4 3 0 x 1 4 x 550 with heat insulator Refrigerant flow in cooling 10 O MU A12WA Refrigerant pipe 1 2 Stop valve with heat insulator with service port zi Outdoor heat Flared exchanger connection Muffler Compressor Flared connection Al Stop valve Capillary tube Refrigerant pipe O D 0 118 x I D 0 063 x 27 9 16 Option g1 4 3 0 x 1 6 x 700 with heat insulator Refrigerant flow in cooling MAX REFRIGERANT PIPING LENGTH amp MAX HEIGHT DIFFERENCE Refrigerant piping ft Piping size in Additional piping Additional piping Gas Liquid Max length Max length Outside Minimum Outside Minimum A B diameter Wall diameter thickness thickness 0 0315 1 4 0 0315 MU A09WA Bb 3 8 MU A12WA 1 2 MAX HEIGHT DIFFERENCE Indoor unit Max Height Additional Piping diferenoe Max length Outdoor unit ADDITIONAL REFRIGERANT CHARGE R410 oz Refrigerant piping length one way 35ft 40ft 45ft 50ft 55ft Mode
8. D DIMENSIONS MU A09WA Unit inch REQUIRED SPACE Basically open 4inch or more 15 3 4 7 without any obstruction in front Drainage hole 1 5 8 and on both sides of the unit 1 3 4 gy Air in Air in gt 2 3 8x13 16 Oval hole 7 8 29 32 11 1 4 gt 3 I Open two sides of left right or rear side uo AY F Liquid pipe 1 4 flared Gas pipe 3 8 flared Y i 11 29 32 6 23 32 2 5 15 16 19 11 16 k 31 1 2 2 23 32 MU A12WA REQUIRED SPACE Drainage 13 31 32 co hole 5 8 _ 19 3 4 Air T m 4 5 60 to in orp Ore o 22 9 2 9 Air in s Drainage Air out 1 15 16 14 in A Sholes 1 5 16 1 3 16 K Service panel Liquid refrigerant pipe joint Refrigerant pipe z flared 1 4 N Gas refrigerant pipe joint Rfrigerant pipe flared 1 2 19 11 16 33 7 16 5 WIRING DIAGRAM MU A09WA TR SYMBOL NAME dutta is e BL E den COMPRESSOR CAPACITOR BLK F74 BLK C2 FAN MOTOR CAPACITOR nas 0 DSAR SURGE ABSORBER
9. IQUID 21 4 E02 BACK PANEL SERVICE PANEL TERMINAL BLOCK 3P TERMINAL BLOCK 2P OUTDOOR FAN CAPACITOR 7 0uF 250VAC COMPRESSOR CAPACITOR 70uF 220VAC COMPRESSOR CONTACTOR SERVICE PORT 1PCE SET SEPARATOR CONDENSER NET MOTOR SUPPORT TOP PANEL CAPILLARY TUBE O D 0 118 x I D 0 055x21 21 32 SURGE ABSORBER pT MU A12WA 2 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS 22 DD DTE OOOO NSSSSSSSSSSSSSS Sy Te ZJ 59 SS gt N pe wo Part number that is circled is not shown in the illustration Symbol Q ty unit Part No Part name in Wiring Remarks Diagram MU A12WA E02 A50 233 BACK PANEL E02 817 232 CABINET E02 817 521 GRILLE E02 141 501 PROPELLER E02 139 515 MOTOR SUPPORT E02 A50 900 COMPRESSOR E02 075 506 COMPRESSOR RUBBER SET E02 A27 290 BASE E02 A50 661 STOP VALVE GAS E02 A50 662 STOP VALVE LIQUID E02 819 650 VALVE COVER E02 A49 641 SERVICE PORT E02 A50 245 SERVICE PANEL E02 A49 374 TERMINAL BLOCK E02 A50 374 TERMINAL BLOCK A50 353 COMPRESSOR CAPACITOR A49 340 COMPRESSOR CONTACTOR A50 350 OUTDOOR FAN CAPACITOR A50 293 SEPARATOR A50 630 OUTDOOR HEAT EXCHANGER A50 301 OUTDOOR FAN MOTOR 817
10. MITSUBISHI ELECTRIC SPLIT TYPE AIR CONDITIONERS OUTDOOR UNIT SERVICE MANUAL Wireless type Models MU A09WA MU A12WA MU A12WA MU A09WA 888894848890 888885858558 MU A12WA Changes for the Better Revision A MU A12WA 3 has been added Please void OB449 No OB449 REVISED EDITION A HFC utilized R410A Indoor unit service manual MS A WA Series OB448 CONTENTS 1 TECHNICAL CHANGES een 2 2 PART NAMES AND FUNCTIONS 5 3 SPECIFICATION neee eneneenenenenen 6 4 OUTLINES AND DIMENSIONS 8 5 WIRING DIAGRAM 9 6 REFRIGERANT SYSTEM DIAGRAM 10 TODAT A SARI e 12 8 TROUBLESHOOTING 16 9 DISASSEMBLY INSTRUCTIONS 17 Ao PARTS LISTS nn eee 22 10 1 PARTS LIST 22 10 2 RoHS PARTS LIST 24 NOTE LIST RoHS compliant 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 S CMT Revision A e MU A12WA 11 has been added 1 TECHNICAL CHANGES MUO9TW gt MU A09WA MU12TN gt MU A12WA 1 Outdoor unit model has been changed 2 Refrigerant has be
11. R 24 O S S MU A12WA 2 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS 22 DUE TD VETE ETE NSSSSSSSSSSSSS eK Part number that is circled is not shown in the illustration z Part No Part name Q ty unit Symbol in Wiring Diagram MU A12WA MU A12WA41 Remarks E12 A50 233 BACK PANEL E12 817 232 CABINET E12 817 521 GRILLE E12 141 501 PROPELLER E12 139 515 MOTOR SUPPORT E12 A50 900 COMPRESSOR RN110WHDHT E12 075 506 COMPRESSOR RUBBER SET 3RUBBERS SET E12 A27 290 BASE RIN 12 50 661 STOP VALVE GAS 21 2 E12 A50 662 STOP VALVE LIQUID 21 4 E12 819 650 VALVE COVER E12 A49 641 SERVICE PORT 1PCE SET E12 A50 245 SERVICE PANEL E12 A49 374 TERMINAL BLOCK 2P E12 A50 374 TERMINAL BLOCK E12 50 353 COMPRESSOR CAPACITOR 75uF 220V AC A49 340 COMPRESSOR CONTACTOR A50 350 OUTDOOR FAN CAPACITOR 9 5uF 250V AC A50 293 SEPARATOR A50 630 OUTDOOR HEAT EXCHANGER A50 301 OUTDOOR FAN MOTOR RA6W504 817 009 HANDLE 936 CAPILLARY TUBE O D 0 118 X I D 0 063 X27 9 26 G G G G G G G G G G
12. ach 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 refrigeration oil of the upper layer to flow back to the Compressor Suction muffler Suction muffler Compressor Compressor Oil back hole Compressor refrigeration oil Refrigerant refrigeration oil Refrigerant Conversion chart of refrigerant temperature and pressure R410A R22 Saturated liquid pressure 3 22 4 14 32 50 68 86 104 122 140 F j 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 R410A tools Can R22 tools be used Description Gauge manifold en high pressures beyond the measurement range of existing Charge hose Hose material have been changed to improve the pressure resistance Gas leak detector Dedicated for refrigerant 1 2in and 5 8in Flare tool Clamp bar hole has been enlarged to reinforce the spring strength in the tool Flare gauge Provided for flaring work to be used with R22 flare tool Vacuum pump New Provided to prevent the back flow of oil This adapter enables you to use adapter vacuum pumps Electronic scale for N It is difficult to measure R410A with a charging cylinder because the ew DN refrigerant char
13. compressor Compressor Compressor nuts ___ __ 9 2 MU A12WA OPERATING PROCEDURE PHOTOS 1 Removing the cabinet 1 Remove the screws of the cabinet 2 Hold the bottom of the cabinet on the both side to remove the cabinet 3 Remove the the cabinet Photo 1 Y EE of the cabinet TM A Photo 2 A 2 Service panel 2 L SW cover E p n 2 Removing the electrical parts 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 Photo 3 Outdoor fan capacitor C2 CN block TB1 Compressor capacitor C1 Terminal block TB2 20 OPERATING PROCEDURE PHOTOS 3 Removing propeller and the outdoor fan motor Photo 4 Hook Lead clamp 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 a When attaching the propeller align the mark 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 outd
14. en changed R22 gt R410A 3 Compressor has been changed MUA12WA gt MU A12WA 1 WIRING DIAGRAM has been changed _ INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT This room air conditioner adopts refrigerant R410A which never destroys the ozone layer Pay particular attention to the following points though the basic installation procedure is same as that for R22 air conditioners As R410A has working pressure approximate 1 6 times as high as that of R22 some special tools and piping parts materials are required Refer to the table below Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during storage and installation since it is more susceptible to contaminations than R22 9 For refrigerant piping use clean pressure proof parts materials specifically designed for R410A Refer to 2 Refrigerant piping Composition change may occur in R410A since it is a mixed refrigerant When charging charge liquid refrigerant to prevent composition change Leeg Previous refrigerant Refrigerant HFC 32 HFC 125 50 50 R22 100 Steam pressure 77FIPSIG ODP x1 Ozone Destruction Parameter based on CFC 11 x2 Global Warmth Parameter based on CO2 Refrigerant l New Specification Current Specification The incompatible refrigeration oil easily separates from Since refrigerant and refrigeration oil are compatible e
15. ging refrigerant bubbles due to high pressure and high speed vaporization No Not Substitutable for RA10A Yes Substitutable for R410A 2 Refrigerant piping O Specifications Use the copper or copper alloy seamless pipes for refrigerant that meet the following specifications Outside diameter in Wall thickness in Insulation material Heat resisting foam plastic Specific gravity 0 045 Thickness 0 315 in Flaring work and flare nut Flaring work for R410A pipe differs from that for R22 pipe For details of flaring work refer to Installation manual FLARING WORK Pipe diameter Dimension of flare nut 4 mm in pT 3 Refrigerant oil Apply the special refrigeration oil accessories packed with indoor unit to the flare and the union seat surfaces 4 Air purge Do not discharge the refrigerant into the atmosphere Take care not to discharge refrigerant into the atmosphere during installation reinstallation or repairs to the refrigerant circuit Use the vacuum pump for air purging for the purpose of environmental protection 5 Additional charge For additional charging charge the refrigerant from liquid phase of the gas cylinder If the refrigerant is charged from the gas phase composition change may occur in the refrigerant inside the cylinder and the outdoor unit In this case ability of the refrigeration cycle decreases or normal operation can be impossible However charging the liquid refrigerant all at once may
16. ires 8 2 Instruction of trouble shooting Lead wiring If indoor unit and outdoor unit doesn t operate please check of outdoor unit fuse F 8 3 Trouble criterion of main parts MU A09WA MU A12WA 8 TROUBLESHOOTING gv Housing point Part name Check method and criterion Compressor MC INNER PROTECTOR MU A09WA 302 9 F OPEN 194 18 F CLOSE MU A12WA 338 9 F OPEN 194 18 F CLOSE MU A12WA 1 311 9 F OPEN 194 18 F CLOSE Outdoor fan motor MF INNER PROTECTOR MU A09WA 248 9 F OPEN INNER PROTECTOR MU A12WA 248 9 F OPEN Measure the resistance between the terminals with a tester Coil wiring temperature 14 F 104 F Color of the Normal lead wire MU AO09WA MU A12WA C R 0 71 0 87Q 0 58 0 710 C S 1 311 610 1 091 330 Measure the resistance between the terminals with a tester Coil wiring temperature 14 F 104 F MU A09WA Color of the Normal lead wire MU A09WA MU A12WA WHT BLK 51 630 27 330 BLK RED 62 760 34 410 00 JU BLK RED ORN WHT INNER PROTECTOR lt 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
17. l Outdoor unit precharged MU A09WA 2lb 5oz MU A12WA 3lb 10z 2 16 3 24 4 32 5 40 6 48 NOTE Calculation Xoz 1 08 5oz ft X Refrigerant piping length ft 25 11 7 DATA MS A09WA MS A12WA 7 1 PERFORMANCE DATA 1 COOLING CAPACITY Indoor air Outdoor intake air DB temperature F IWB 95 CF TPC TC SHC TPC TC 71 E 8 s 0 85 5 6 I 9 5 MS A09WA 67 0 80 9 5 6 5 8 8 63 s 0 77 8 9 7 3 8 1 71 1 04 7 3 MS A12WA 67 i 0 99 i 8 4 63 I i 0 95 9 4 Notes 1 IWB Intake air wet bulb temperature TC Total Capacity x10 Btu h SHC Sensible Heat Capacity x10 Btu h TPC Total Power Consumption kW 2 SHC is based on 80 F of indoor intake air DB temperature 2 COOLING CAPACITY CORRECTIONS Refrigerant piping length one way 25ft std 40ft 65ft MS A09WA 1 0 0 954 0 878 MS A12WA 7 2 PERFORMANCE CURVE NOTE A point on the curve shows the reference point MS A09WA MS A12WA Cooling Coolin SHF at rating condition 0 68 SHF at rating condition 0 70 Airflow 300CFM Airflow 363CFM x10 Btu h Total capacity Total capacity x10 Btu h Total power consumption KW Total power consumption KW 67 75 85 95 105 115 Outdoor intake air DB temperature F Outdoor intake air DB
18. ompressor contactor 52C Photo 3 Compressor capacitor C1 Compressor contactor 52C Outdoor fan capacitor C2 Surge absorber DSAR Terminal block TB2 3 Removing the propeller and the outdoor fan motor 1 Remove the cabinet Refer to 1 2 Remove the propeller nut and 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 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 Photo 4 Propeller Screws of the outdoor fan motor Sound proof felt Outdoor fan motor connector 18 Rw ws OPERATING PROCEDURE PHOTOS 4 Removing the compressor 1 Remove the cabinet Refer to 1 Photos 2 Remove the relay panel Suction pipe 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 6 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSIG 7 Disconnect the welded part of the suction pipe and dis charge pipe 8 Remove the nuts fixing the compressor 9 Remove the
19. oor fan motor us Souhdproof felt Propeller Propeller nut 4 Removing the compressor Photo 5 1 Remove the cabinet Refer to 1 2 Remove the relay panel 8 Remove the soundproof felt Discharge 4 Remove the terminal cover pipe 5 Pull out the lead wires from the glass terminal of the com pressor 6 Recover gas from the refrigerant circuit 7 Disconnect the welded part of the suction pipe and dis charge pipe 8 Remove the nuts fixing the compressor the compres J Relay sor Y LEN _ Glass Before using a burner reclaim gas from the pipes until the 3 4 terminal o pressure gauge shows 0 PSIG Use the burner under the condition that gas can be recovered even when the inner pressure rises by heat Compressor set nuts 21 MU A09WA 1 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS Part No Part name Symbol in Wiring Diagram Q ty unit MU A09WA 10 PARTS LIST 10 1 PARTS LIST non RoHS compliant Remarks E02 A49 OUTDOOR HEAT EXCHANGER E02 A49 OUTDOOR FAN MOTOR MF RA6W26 E02 665 PROPELLER E02 903 CABINET E02 GRILLE OUT E02 BASE E02 COMPRESSOR RUBBER SET SRUBBERS SET E02 COMPRESSOR RNO92WHDHT E02 STOP VALVE GAS 23 8 E02 STOP VALVE L
20. pulling it out Check the shape of the terminal before detaching 1 Slide the sleeve and check if there is a locking lever or not Slide the sleeve Pull the terminal while 2 The terminal with this connector has the locking mechanism Hold the sleeve and pull out the terminal DISASSEMBLY INSTRUCTIONS pushing the locking slowly lever De Connector 9 1 MU A09WA OPERATING PROCEDURE PHOTOS 1 Removing the cabinet Photo 1 1 Remove the screw fixing the service panel 2 Pull down the service panel and remove it Screws 3 Remove the conduit cover ofthe Screw of NT 4 Disconnect the power supply wire and indoor outdoor con top panel me the top panel necting wire A Remove the screws fixing the top panel Remove the top panel Remove the screws fixing the cabinet Remove the cabinet Remove the screws fixing the back panel 10 Remove the back panel Photo 2 5 6 7 8 9 Screw of the conduit cover Conduit plate _ 4 n 1 Pd Iy T x Screws of the cabinet Service panel Back panel 39 Screw of 4 the service panel OPERATING PROCEDURE PHOTOS 2 Removing the electrical parts 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 TB1 TB2 Surge absorber DSAR C
21. temperature F 12 __ S 5 O 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 Condensing pressure Suction pressure 280 Z TI 68 70 75 100 105 F 68 70 75 80 85 90 95 100 105 F He ambient QR Outdoor ambient temperature MU A12WA indoor DB temperature F Condensing pressure Suction pressure TT T _ 1 68 70 75 80 85 90 95 100 105 F 68 70 75 80 85 90 95 100 105 F Outdoor ambient temperature Outdoor ambient temperature 13 7 4 STANDARD OPERATION DATA Model MS A09WA MS A12WA Item Cooling Cooling Capacity 9500 12000 SHF 0 68 0 70 Input 0 87 1 07 INDOOR UNIT MODEL MS A09WA MS A12WA Power supply V phase Hz 115 1 60 115 1 60 Input 0 019 0 035 Fan motor current 0 27 0 51 OUTDOOR UNIT MODEL MU AOQWA MU A12WA Power supply V phase Hz 115 1 60 115 1 60 Input 0 851 1 035 Comp current 6 74 7 96 Fan motor current 0 63 0 93 Condensing pressure 372 375 Suction pressure 144 150 Discharge temperature E 154 149 Condensing temperature E 110 111 Refrigerant circui Suction temperature i 48 50 Comp shell bottom temp Ref pipe length 25 25 Refrigerant charge R22 2lb 502 3lb 1oz 80 80 Intake air
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