Mitsubishi Electric MUX-A20WV Service Manual

SERVICE MANUALCONTENTS1. TECHNICAL CHANGES ····································22. PART NAMES AND FUNCTIONS······················63. INDOOR / OUTDOOR

10 Outdoor model FunctionCapacityDehumidificationOutdoor air flowPower outletRunning currentPower inputAuxiliary heaterPower factorStar

11 Outdoor model FunctionCapacityDehumidificationOutdoor air flowPower outletRunning currentPower inputAuxiliary heaterPower factorStar

12NOISE CRITERIA CURVES590807060504030201063 125 250 500 1000 2000 4000 8000APPROXIMATETERESHOLD OFHEARING FORCONTINUOUSNOISENC-60NC-50NC-40NC-30NC-20

13OUTLINES AND DIMENSIONS63202510-12676120562601078050012240540320285255Service panelGas refrigerant pipe jointRefrigerant pipe(flared) [9.52

14MUX-3A60VB-MUX-3A63VB-E1E1OUTDOOR UNIT500840 6126410°10°Service panelOpen as a rule500mm or more ifthe front and bothsides are open100mm or more 200

15Service panelD UnitC UnitB UnitA Unit{33Drainage 3 holesAir outAir inAir in1253305001002734384030360344308508401218061657650505050 50505026010°10°Li

16WIRING DIAGRAM7OUTDOOR UNITPEBLUBRNF62DSARCIRCUIT BREAKERWHT 1 2TB31BLKREDC22143X1X1X2X243BLUBRN BRN BRNF61BRNBRNWHTWHTWHTWHTBRN52CNO52CCOM31REDBL

17123123213REDREDNR61T61124343C61LD1WHTWHTOUTDOOR CONTROLP.C. BOARDBRNBLUBRNBLUBRNX522X521BLKSR861LD2REDBLKWHT652 3 41BRNBLUBLUTB4CN90TB2X521X522F61CN

181231231232131 2 31 2 31 2 321R421R3NR61T61124343C61LD1WHTWHTOUTDOOR CONTROL P.C. BOARDBRNBLUBRNBLUBRNBLUBLUX522X521BLKSR865SR866SR863SR861LD2REDREDR

191231231232131 2 31 2 31 2 321R421R3NR61T61124343C61LD1WHTWHTOUTDOOR CONTROL P.C. BOARDBRNBLUBRNBLUBRNBLUBLUX522X521BLKSR865SR866SR863SR861LD2REDREDR

TECHNICAL CHANGES21MUX-A10WV- ➔MUX-2A28VB-MUX-A20WV- ➔MUX-3A60VB-1. Indication of capacity has been changed. (BTU➔kW)MUX-A19WV- ➔MUX-2A59VB-MUX-A22WV-

20DSARCIRCUIT BREAKERLN21211212BLKREDMF6121R1BLUBLUREDREDOUTDOOR CONTROL P.C. BOARDT613 443X521X522MC1SR CMC2SR CC1C2BLKREDWHTREDBLKWHTX522 X521133131

21REFRIGERANT SYSTEM DIAGRAM8Indoor unit AOutdoor unitMUX-2A28VB- E1Additional piping max. length 15mMax. lengthdifference10mIndoor unit BUNIT AIndoor

22OUTDOOR UNITINDOOR UNITUNIT AIndoorheatexchangerIndoor coilthermistorRT12RoomtemperaturethermistorRT11UNIT BIndoorheatexchangerOutdoorheatexchangerI

23LAIndoor unit AH LB HIndoor unit BOutdoor unit MUX-2A59VB - E1Outdoor unitprecharged1000gRefrigerant piping length (one way)unit BOutdoor unitprecha

24MUX-3A60VB-E1Unit : mmOUTDOOR UNITINDOOR UNITUNIT AIndoorheatexchangerIndoor coilthermistorRT12RoomtemperaturethermistorRT11UNIT BIndoorheatexchange

25LAIndoor unit AH LB H LCHIndoor unit BIndoor unit COutdoor unit MUX-3A60VB - E1UNIT No.InsulationthicknessPipeFor liquidFor gasOutside diametermm6.3

26MUX-3A63VB-E1Unit : mmOUTDOOR UNITINDOOR UNITUNIT AIndoorheatexchangerIndoor coilthermistorRT12RoomtemperaturethermistorRT11UNIT BIndoorheatexchange

27Outdoor unitprecharged850gRefrigerant piping length (one way)Unit B + Unit COutdoor unitprecharged850gRefrigerant piping length (one way, 2 unit tot

28OUTDOOR UNITINDOOR UNITUNIT AIndoorheatexchangerIndoor coilthermistorRT12RoomtemperaturethermistorRT11UNIT BIndoorheatexchangerOutdoorheatexchangerI

29LAIndoor unit AH LB HIndoor unit BOutdoor unit MUX-2A70VB - E1UNIT No.InsulationthicknessPipeFor liquidFor gasOutside diametermm6.359.528mm8mmand u

3RefrigerationoilRefrigerantNew refrigerantR410AHFC-32: HFC-125 (50%:50%)Pseudo-azeotropic refrigerantNot includedA1/A172.6-51.41.55764Non combustible

30MUX-4A73VB-E1Unit : mmUNIT AIndoorheatexchangerIndoor coilthermistorRT12RoomtemperaturethermistorRT11UNIT BIndoorheatexchangerOutdoorheatexchangerIn

31UNIT No.InsulationthicknessPipeFor liquidFor gasFor liquidFor gasOutside diametermm6.359.526.359.528mm8mm8mm8mmInsulation materialHeat resisting foa

PERFORMANCE CURVES329The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions,si

331.31.11.00.90.80.7(kgf/F[Gauge])(MPa[Gauge])Outdoor low pressure (kgf/F[Gauge])1110987131.212Outdoor unit current (A)Single operation (Unit A or B)1

341.21.00.90.80.70.6(kgf/F[Gauge])(MPa[Gauge])Outdoor low pressure (kgf/F[Gauge])109876121.111Outdoor unit current (A)Single operation (Unit A)2.03.04

35MSC-CA20VB - MSC-GA20VB - (Single) : MUX-2A28VB -E1E1E1PERFORMANCE DATACOOL operation (230V)21 18 2.82 1.58 0.56 608 2.70 1.51 0.56 638 2.59 1.45

36MSC-CA20VB - MSC-GA20VB - (Single) : MUX-2A28VB -E1E1E1PERFORMANCE DATACOOL operation (230V)NOTE Q :Total capacity (kW) SHF :Sensible heat factor

37MSC-CA20VB - MSC-GA20VB - (Single : Room B) : MUX-2A59VB -E1E1E1PERFORMANCE DATACOOL operation (230V)21 18 2.82 1.58 0.56 656 2.70 1.51 0.56 689

38MSC-CA20VB - MSC-GA20VB - (Single : Room B) : MUX-2A59VB -E1E1E1PERFORMANCE DATACOOL operation (230V)21 18 2.35 1.32 0.56 804 2.16 1.21 0.56 853

39MSC-CA35VB - MSC-GA35VB - (Single : Room A) : MUX-2A59VB -E1E1E1PERFORMANCE DATACOOL operation (230V)21 18 4.11 2.25 0.55 1056 3.94 2.15 0.55 110

4-30 -20 -10 0 10 203040 50 60-0.50.00.51.01.52.02.53.03.54.0(MPa [Gauge])R410AR22Conversion chart of refrigerant temperature and pressureSaturated li

40MSC-CA35VB - MSC-GA35VB - (Single : Room A) : MUX-2A59VB -E1E1E1PERFORMANCE DATACOOL operation (230V)21 18 3.43 1.88 0.55 1294 3.15 1.72 0.55 137

41MSC-CA25VB - MSC-GA25VB - (Single : Room A) : MUX-3A60VB -E1E1E1PERFORMANCE DATACOOL operation (230V)21 18 3.06 1.74 0.57 680 2.93 1.67 0.57 714

42MSC-CA25VB - MSC-GA25VB - (Single : Room A) : MUX-3A60VB -E1E1E1PERFORMANCE DATACOOL operation (230V)21 18 2.55 1.45 0.57 833 2.34 1.33 0.57 884

43MSC-CA25VB - MSC-GA25VB - (Single : Room B) : MUX-3A60VB -E1E1E1PERFORMANCE DATACOOL operation (230V)NOTE Q :Total capacity (kW) SHF :Sensible he

44MSC-CA25VB - MSC-GA25VB - (Single : Room B) : MUX-3A60VB -E1E1E1PERFORMANCE DATACOOL operation (230V)NOTE Q :Total capacity (kW) SHF :Sensible he

45MSC-CA35VB - MSC-GA35VB - (Single : Room A) : MUX-3A63VB -E1E1E1PERFORMANCE DATACOOL operation (230V)NOTE Q :Total capacity (kW) SHF :Sensible he

46MSC-CA35VB - MSC-GA35VB - (Single : Room A) : MUX-3A63VB -E1E1E1PERFORMANCE DATACOOL operation (230V)NOTE Q :Total capacity (kW) SHF :Sensible he

47MSC-CA20VB - MSC-GA20VB - (Single : Room B or C) : MUX-3A63VB -E1E1E1PERFORMANCE DATACOOL operation (230V)NOTE Q :Total capacity (kW) SHF :Sensib

48MSC-CA20VB - MSC-GA20VB - (Single : Room B or C) : MUX-3A63VB -E1E1E1PERFORMANCE DATACOOL operation (230V)NOTE Q :Total capacity (kW) SHF :Sensib

49MSC-CA35VB - MSC-GA35VB - (Single) : MUX-2A70VB -E1E1E1PERFORMANCE DATACOOL operation (230V)21 18 4.11 2.25 0.55 1072 3.94 2.15 0.55 1126 3.78 2.

5Electronic scale for refrigerant chargingOutdoor unitRefrigerant gas cylinderoperating valveRefrigerant gas cylinderfor R410A with siphonRefrigerant

50MSC-CA35VB - MSC-GA35VB - (Single) : MUX-2A70VB -E1E1E1PERFORMANCE DATACOOL operation (230V)21 18 3.43 1.88 0.55 1313 3.15 1.72 0.55 1394 3.03 1.

51MSC-CA25VB - MSC-GA25VB - (Single : Room C ) : MUX-4A73VB -E1E1E1PERFORMANCE DATACOOL operation (230V)21 18 3.23 1.76 0.55 840 3.09 1.69 0.55 882

52PERFORMANCE DATACOOL operation (230V)21 18 2.70 1.47 0.55 1029 2.48 1.35 0.55 1092 2.38 1.30 0.55 111321 20 2.83 1.20 0.43 1071 2.64 1.12 0.43 1124

53MSC-CA35VB - MSC-GA35VB - (Single : Room A) : MUX-4A73VB -E1E1E1PERFORMANCE DATACOOL operation (230V)21 18 4.00 2.37 0.59 976 3.83 2.27 0.59 1025

54MSC-CA35VB - MSC-GA35VB - (Single : Room A) : MUX-4A73VB -E1E1E1PERFORMANCE DATACOOL operation (230V)21 18 3.33 1.98 0.59 1196 3.06 1.81 0.59 126

55ACTUATOR CONTROL10OUTDOOR UNIT ACTUATOR CONTROLACTUATORONOFFONOFFONOFFON (OPEN)OFF (CLOSE)ON (OPEN)OFF (CLOSE)ON (OPEN)OFF (CLOSE)ON (OPEN)OFF (CLOS

TROUBLESHOOTING5611Lead wiringHousing pointMUX-2A28VB - MUX-3A63VB -MUX-2A59VB - MUX-2A70VB -MUX-3A60VB - MUX-4A73VB -E1E1E1E1E1E111-1. Cautions on tr

5711-2. Instruction of troubleshootingStartIndoor unit operates.Outdoor unit doesn't operate.Indoor unit doesn't receive the signal from re

58FUSEBLKREDWHTOutdoor fanmotor(MF, MF61)INNER FUSEMUX-2A28VB145°C OPENINNERPROTECTORMUX-2A59/3A60/3A63/2A70/4A73VB145i8°C OPENMeasure the resistance

59AACheck of outdoor unitNoStartPress the EMERGENCY OPERATION switch of all indoor units. YesIs there 230V AC between L - N on the TB1 of outdoor uni

PART NAMES AND FUNCTIONS62Air inletPipingDrain hoseAir outletDrain outlet(back and side)OUTDOOR UNITMUX-2A28VB-E1Air inletPipingDrainage hose(Back and

60Does compressor or outdoor fan motor stop?Replace the outdoor control P.C. board.YesOKNoReplace the indoor electoronic control P.C. board.StartTurn

61DDCheck of indoor/outdoor units’ connection and outdoor unitCool air does not blow out although indoor unit is operating.Turn ON the power supply,

6211-5. Test point diagram and voltageMUX-2A59VB -MUX-3A60VB -MUX-3A63VB -MUX-2A70VB -MUX-4A73VB -Outdoor control P.C. boardE1E1E1E1E1Fuse 250V AC3.15

63DISASSEMBLY INSTRUCTIONS12(1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the loc

642. Removing the relay panel(1) Remove the service panel and the cabinet.(Refer to 1.)(2) Remove the following connectors.• Outdoor fan motor• Soleno

6512-2. MUX-2A59VB - MUX-3A60VB - MUX-3A63VB - MUX-2A70VB -MUX-4A73VB -OUTDOOR UNIT E1E1E1E1E1NOTE : These photos are MUX-3A60VB.Other models are al

66OPERATING PROCEDURE PHOTOS2. Removing the relay panel(1) Remove the cabinet. (Refer to 1.)(2) Disconnect the following connectors..Outdoor fan motor

67OPERATING PROCEDURE PHOTOS5. Removing the compressor (A, B)(1) Remove the cabinet. (Refer to 1.)(2) Remove the relay panel.(3) Remove the soundproof

PARTS LIST681312346752811191013-1. OUTDOOR UNIT STRUCTURAL PARTSMUX-2A28VB -E1No.Part No.Part nameRemarksSymbolin WiringDiagramQ'ty/unit12345678

691234567891011E02 665 501E02 677 301E07 056 374E02 900 351E02 755 341E02 755 340E02 637 374E02 755 374E02 890 383E02 742 353E02

SPECIFICATION74 Outdoor model FunctionCapacityDehumidificationOutdoor air flowPower outletRunning currentPower inputAuxiliary heat

701234567 8 9 10 111213141516617MUX-2A59VB - MUX-3A60VB - MUX-2A70VB - MUX-4A73VB -13-3. OUTDOOR UNIT STRUCTURAL PARTSE1E1E1E118These figures show MUX

71No.Part No.Part NameRemarksSymbolin WiringDiagramQ'ty / unit1234567891011121314151617181920212223242526272829TOP PANELMOTOR SUPPORTMOTOR SUPPOR

1235678910AB11412CCCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTDDistributed in Jan. 2005. No.OB384 6Made in JapanNew publication, effective J

8 Outdoor model FunctionCapacityDehumidificationOutdoor air flowPower outletRunning currentPower inputAuxiliary heaterPower fac

9CapacityDehumidificationOutdoor air flowPower outletRunning currentPower inputAuxiliary heaterPower factorStarting currentCompressor motor currentFan