Mitsubishi Electric MXZ-18TV Wartungshandbuch

SERVICE MANUALCONTENTS1. TECHNICAL CHANGES ····································22. PART NAMES AND FUNCTIONS······················23. INDOOR/OUTDOOR CO

1010-2. Capacity and input correction by inverter output frequency (OUTDOOR UNIT:MXZ-18TV)NOTE 1 : Inverter output frequency : COOL 55Hz,HEAT 80HzNOT

1110-3. Outdoor low pressure and outdoor unit current 1. 07-class unit in single operation (OUTDOOR UNIT : MXZ-18TV)NOTE:The unit of pressure has been

122. 09-class unit in single operation (OUTDOOR UNIT : MXZ-18TV)NOTE:The unit of pressure has been changed to MPa on the international system of units

133. 12-class unit in single operation (OUTDOOR UNIT : MXZ-18TV)NOTE:The unit of pressure has been changed to MPa on the international system of units

MICROPROCESSOR CONTROL1411CompressorpowerfactorIndoor unitmicroprocessorSSR61DrivecircuitTransistormoduleIndoor UnitBIndoor UnitBComp.Dischargetempera

15Linear expansion valve (LEV) is controlled by "Thermostat ON" commands given from each unit.• The standard opening is on the straight line

16(1) LEV opening correction by suction super heat (COOL, DRY)(Suction super heat) = (Minimum gas pipe temperature) - (Evaporation temperature)When CO

1711-2.Operational frequency range(3) LEV opening correction by discharge temperatureWhen LEV correction output is 0 pulse by the suction super heat a

18This protection controls the compressor ON/OFF and operation frequency according to temperature of the discharge temp. thermistor.(1) Compressor ON/

1912 TROUBLESHOOTING3. Troubleshooting procedure1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate

PART NAMES AND FUNCTIONS2OUTDOOR UNITAir inletAir outlet(back and side)Model indicationMXZ-18TV-MXZ-18TV-E2E12TECHNICAL CHANGES1MXZ-18RV - ➔ MXZ-18TV

20Outdoor power system When the compressor operation has been interrupted by overcurrentprotection continuously three times within 1 minute after star

21Current protection When the outdoor unit input current exceeds 15.5A.These symptoms do not mean any abnor-mality of the product, but check the follo

22BBCheck of outdoor unit serial signalNoYesStart1. Check the indoor unit with referring to the indoor unit service manual.2. Turn off the power suppl

23CCCheck of R. V. coilNoYesNoYesNoYesNoYesNoYesStart1. Disconnect the lead wire leading to the compressor.2. Turn on power supply to the indoor and

24DDCheck of LEVNoYesNoYesStartTurn on power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely.Is "click - c

25GGCheck of outdoor fan motorAbnormalNormalYesNoNoYesNoYesStartCheck the connection of connector (CN851) in the fan motor relay connector and outdoor

26HHThe other casesIndoor unit dose not operate. (difference modes)• When you try to run two indoor unit simultaneously, one for cooling and the other

27-20 -10 0 10 20 30 400102030405060708090100Temperature(:)Gas pipe temperature thermistor (RT65,66)Evaporation temperature thermistor (RT63)Temperatu

28Noise filter P.C.boardMXZ-18TV-E1230V AC 50Hz InputOutdoor FanFan speed “Hi”230V ACOutdoor FanFan speed “Lo”230V AC230V AC 50Hz OutputReversing valv

29DISASSEMBLY INSTRUCTIONS13OPERATING PROCEDUREPHOTOS1. Removing the top panel ~ back panel(1) Remove the screws fixing the top panel and remove it.(P

33INDOOR / OUTDOOR CORRESPONDENCE TABLE❈There is no combination other than this table.MXZ-18TV- E1OUTDOOR UNITCombination of the connectable indoor un

30OPERATING PROCEDUREPHOTOS5. Removing the 4-way coil(1) Remove the top panel, front cover and service panel.(2) Remove the inside and outside connect

31OPERATING PROCEDURE PHOTOS9. Remove the compressor(1) Remove the top panel, front cover, service panel.(2) Remove the inside and outside connection

14-1. OUTDOOR UNIT FUNCTIONAL PARTSMXZ-18TV -MXZ-18TV -E2E1PARTS LIST321412345678910111213141516FIN TEMPERATURE THERMISTORDIODE STACKREACTORCONNECTOR

3314-2. OUTDOOR UNIT STRUCTURAL PARTSMXZ-18TV -MXZ-18TV -E2E11234567891011121314151617181920FRONT PANEL ASSEMBLYGRILLE BASE ASSEMBLYCOMPRESSOREXPANSIO

3415-1. Different-diameter pipeUnit : mm (inch)For different-diameterpipesMXZ-18TVMAC-454JPModel name51H-454Model codeConnected pipesdiameter (mm)Leng

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HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPANCCCopyright 2001 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD.Distri

45SPECIFICATIONOutdoor modelIndoor units numberIndoor units total capacity (Connectable)indoor units total capacity (Simultaneous operation)Piping tot

5NOISE CRITERIA CURVES690807060504030201063 125 250 500 1000 2000 4000 8000APPROXIMATETERESHOLD OFHEARING FORCONTINUOUSNOISENC-60NC-50NC-40NC-30NC-20N

6OUTLINES AND DIMENSIONS7MXZ-18TV -MXZ-18TV -E2E1Unit: mmOUTDOOR UNIT23166980050040045.440165347.5Air inAir outAir inDrainage hole {33Drainagehole {33

7WIRING DIAGRAM8R61IPMFUSE(1A)T801CT62WVUTAB61TAB65C65SSR61CN664 CN663 CN66166MF61CN912CN91121S4CN61R62TAB62VWUMCBLKWHTRED REDWHTBLKPEF911(1A)BLUORNYL

8REFRIGERANT SYSTEM DIAGRAM9Unit:mmMXZ-18TV -MXZ-18TV -E2E1CompressorDischargetemperaturethermistorR.V. coilheating ONcooling OFFRefrigerant flow in c

910The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions,since operating cond