SERVICE MANUALCONTENTS1. TECHNICAL CHANGES ····································22. PART NAMES AND FUNCTIONS······················53. SPECIFICATION····
10MUZ-GA71VA -E1BLKCN90212CN90312TAB4X64 3R64A R64BRED2314LYLWYLWRED230V~12-24VCN912CN663WHTBLUNOISEFILTERP.C.BOARDBRNTO INDOORUNITCONNECTINGREDS3RT65
11REFRIGERANT SYSTEM DIAGRAM7MUZ-GA50VA -MUZ-GA60VA -E1E1OUTDOOR UNITUnit:mmOutdoorheatexchangerFlared connectionDefrostthermistorRT61Dischargetempera
12Refrigerant PipingMax. length Aw Height difference should be within 15m regardless of which unit, indoor or outdoor position is high.w Ma
13PERFORMANCE CURVES8The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions.Si
14MUZ-GA71VA -E1MUZ-GA71VA -E1MUZ-GA71VA -E1MUZ-GA71VA -E1Capacity correction factorsInput correction factorsInput correction factorsCapacity corr
15<How to operate fixed-frequency operation (Test run operation)> 1. Press EMERGENCY OPERATION switch to COOL or HEAT mode (COOL : Press once, H
16HEAT operationCondition indoor: Dry bulb temperature 20.0°CWet bulb temperature 14.5°CCondition outdoor: Dry bulb temperature 2,7,15,20.0°CWet bulb
17MSZ-GA50VA - : MUZ-GA50VA -E1E121 18 5.88 3.23 0.55 1168 5.63 3.09 0.55 1226 5.40 2.97 0.55 1285 5.20 2.86 0.55 134321 20 6.13 2.63 0.43 1226 5.88 2
1821 18 4.90 2.70 0.55 1431 4.50 2.48 0.55 1518 4.33 2.38 0.55 154821 20 5.15 2.21 0.43 1489 4.80 2.06 0.43 1562 4.63 1.99 0.43 160622 18 4.90 2.89 0.
1921 18 7.05 4.30 0.61 1544 6.75 4.12 0.61 1621 6.48 3.95 0.61 1698 6.24 3.81 0.61 177621 20 7.35 3.60 0.49 1621 7.05 3.45 0.49 1718 6.84 3.35 0.49 17
21TECHNICAL CHANGESRefrigerationoilRefrigerantNew refrigerantR410AHFC-32: HFC-125 (50%:50%)Pseudo-azeotropic refrigerantNot includedA1/A172.6-51.41.55
2021 18 5.88 3.59 0.61 1891 5.40 3.29 0.61 2007 5.19 3.17 0.61 204621 20 6.18 3.03 0.49 1969 5.76 2.82 0.49 2065 5.55 2.72 0.49 212322 18 5.88 3.82 0.
2121 18 8.34 4.42 0.53 1936 7.99 4.23 0.53 2033 7.67 4.06 0.53 2130 7.38 3.91 0.53 222621 20 8.70 3.57 0.41 2033 8.34 3.42 0.41 2154 8.09 3.32 0.41 22
2221 18 6.96 3.69 0.53 2372 6.39 3.39 0.53 2517 6.14 3.25 0.53 256521 20 7.31 3.00 0.41 2468 6.82 2.79 0.41 2589 6.57 2.69 0.41 266222 18 6.96 3.97 0.
23PERFORMANCE DATA HEAT operationCAPACITY:5.9(kW)INPUT:1630(W)OUTDOOR WB(:)INDOOR-10 -5 0 5 10 15 20DB(:)Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q
249ACTUATOR CONTROLMUZ-GA50VA -MUZ-GA60VA -MUZ-GA71VA -E1E1E1Relation between main sensor and actuator.9-3. Relation between main sensor and actuator9
25TROUBLESHOOTING103. Troubleshooting procedure1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate a
26Outline of the functionThis air conditioner can memorize the abnormal condition which has occurred once.Even though LED indication listed on the tro
272. Flow chart of the detailed outdoor unit failure mode recall functionOperational procedureNote 1. Make sure to release the failure mode recall fun
283. Failure mode tableLED1 LED2OFF Normal2-time flash Outdoor power system Outdoor power system Lighting Lighting When IPM protection stop or lockpro
29LED1 LED2OFF Normal11-time flashConverter Communication errorbetween P.C. boardsLighting 6 times When the communication betweenboards protection sto
3-30 -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
30StartIndoor unit operates.Outdoor unit doesn't operate.Indoor unit doesn't receive the signal from remote controller.OPERATION INDICATORl
3110-4. Troubleshooting check table LED1(Red) LED2(Yellow)Lightning Twice Outdoor power system• Check the connection of the compressor connecting wir
32LED1 LED2Primary current protectionSecondary current protectionHigh-pressure protectionDefrosting in cooling3 times LightingDischarge temperaturepro
33Part name Check method and criterionMeasure the resistance using a tester.(Part temperature : -10°C ~ 40°C)Defrost thermistor/ Ambient temperature t
34AACheck of power supplyOutdoor unit does not operate. (LED display: display OFF)Turn on power supply.NoYesYesNoNoYesNoYesYesNoReplace the power boar
35BBHow to check mis-wiring and serial signal error (when outdoor unit does not work)• When unit cannot operate neither by the remote controller nor b
36CCCheck of R.V. coilNoYesNoYesNoYesNoYesNoYesStart1. Disconnect the lead wire leading to the compressor.2. 3 minutes after turning on the power supp
37EEHow to check inverter/ compressorWhen OPERATION INDICATOR lamp flashes 5-time.• When heating, room does not get warm.• When cooling, room does not
38FFCheck of outdoor thermistors• When OPERATION INDICATOR lamp flashes 6-time.• When thermistor is abnormal. (When the LED display is a table below.)
39HHCheck of HPSInfinity0"YesNoStart1. Disconnect the connector CN681 in the electronic control P.C. board.2. Check the resistance of HPS after 1
4Electronic scale for refrigerant chargingOutdoor unitRefrigerant gas cylinderoperating valveRefrigerant gas cylinderfor R410A with siphonRefrigerant
40Electromagnetic noise enters into TV sets or radiosIReplace the antennas.Replace the coaxial cable.NoNoNoYesYesNoNoYesYesYesIs the distance between
4110-7. Test point diagram and voltage1. Outdoor electronic control P.C. boardMUZ-GA50VA - MUZ-GA60VA - MUZ-GA71VA -E1E1E1LED 1LED 2CN801325V DC~370V
42{CN912R.V. coil 230V AC230V AC50HzInput230V AC50Hz Output{{CN901To electroniccontrol P.C. boardMUZ-GA50VA -MUZ-GA60VA -MUZ-GA71VA -E1E1E1F64 FUSE2A/
4313325-370V DCOutput(Red)(White)Connect to the compressorVoltage among phases: 5V to 180VConnect tothe earthCN5Primary current detection(Connect to t
4411DISASSEMBLY INSTRUCTIONS(1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the loc
45OPERATING PROCEDUREPHOTOS2. Removing the inverter assembly, inverter P.C. boardand power board (1) Remove the top panel, cabinet and service panel.(
465. Removing outdoor fan motor(1) Remove the top panel, cabinet and service panel. (Refer to 1.)(2) Remove the back panel. (Refer to 1.)(3) Remove th
47OPERATING PROCEDUREPHOTOSPhoto 8Welded parts of 4-way valve6. Removing the compressor and 4-way valve(1) Remove the top panel, cabinet and service p
48419911310 122567816142022232425293031312PARTS LISTMUZ-GA50VA - MUZ-GA60VA - MUZ-GA71VA -12-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FU
49MUZ-GA50VA - MUZ-GA60VA - MUZ-GA71VA -12-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTSE1E1E1Symbolin WiringDiagramQ't
5PART NAMES AND FUNCTIONS2OUTDOOR UNITAir inletPipingAir outlet(back and side)Drain hoseDrain outletACCESSORIES12Drain socketDrain cap [33 12MUZ-GA50V
50MUZ-GA50VA -MUZ-GA60VA -MUZ-GA71VA -12-2. ACCESSORYE1E1E1Symbolin WiringDiagramQ'ty/unitRemarksPart No.No.Part NameMUZ-GA50 VA -E1MUZ-GA60 VA
51OB389 --2qxp 05.1.26 18:15 Page 51
HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPANCCCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTDDistri
6OUTDOOR UNITModelItemSmoothing capacitorCurrent transformer Current transformerFuse Fuse Fuse
7NOISE CRITERIA CURVES4COOLINGFUNCTIONSPL(dB(A)) LINEHighFAN SPEEDHEATING535590807060504030201063 125 250 500 1000 2000 4000 8000NC-60NC-50NC-40NC-30N
85OUTLINES AND DIMENSIONSUnit: mmOUTDOOR UNITMUZ-GA50VA -MUZ-GA60VA -MUZ-GA71VA -E1E1E130-35-155901984051529966345133036085043050080121840Open as a ru
9WIRING DIAGRAM6MUZ-GA50VA -MUZ-GA60VA -E1E1R64BYLW230V~12-24VCN912CN663WHTBLUNOISEFILTERP.C.BOARDBRNTO INDOORUNITCONNECTINGREDS3RT6521CN6113GRN/YLW5P
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