Mitsubishi Electric MXZ-18NV Manual de servicio

SERVICE MANUALSPLIT-TYPE,HEAT PUMP AIR CONDITIONERSCONTENTS1. TECHNICAL CHANGES ····································22. PART NAMES AND FUNCTIONS······

10Indoor units numberPiping total lengthConnecting pipe lengthHeight difference (indoor ~ outdoor)Height difference (indoor ~ indoor)CoolingHeatingPow

116 OUTLINES AND DIMENSIONSNecessary surrounding clearanceNecessary surrounding clear-ance for concentrated installa-tion.Leave overhead clearance ful

12MXZ-32NV - MXZ-32NV -E2E1Unit:mm1.Installation space2.Service spaceMore than100More than200More than100More than500More than500More than10More than1

13WIRING DIAGRAM7NOTE:1. For the outdoor electric wining refer to the outdoor unit electric wining diagram for servicing.2. Use copper conductors only

14POWER SUPPLY~/N 220-240V 50HzINDOORUNIT (A)12VDCCIRCUIT BRAKERTB2TB3BLUREDTB4X64GRN/YLWGRN/YLWCN720CN60104X64LD62CN913CN791CN901642CN902CN851 CN

15REFRIGERANT SYSTEM DIAGRAM89.526.359.529.522.0X 0.6X500Charge portCapillarytube 4.0X 2.4X400Capillarytube 4.0X 2.4X300Expansionvalve(LEV)E

16MXZ-32NV - MXZ-32NV -E2E1Piping length each indoor unit (a, b, c, d) 25m Total piping length (a+b+c+d) 60m Height difference between units (H) 10m B

17●Refrigerant pipe diameter is different according to indoor unit to be connected. When using extention pipes,refer to the tables below. ●When diame

188.4 EVACUATION PROCEDURESMXZ-18NV - MXZ-18NV -E2E1CAUTION : If you run this unit with air in its refrigerant pipe before air purge, the compressor w

19❶. Make sure the pipes are connected securely.❷. Connect the projected side (on which the setting pin is pressed) of the gauge manifold valve´s char

2Air outAir inAir outletModel indicationAir intakeLocated on the backand the left side.PART NAMES AND FUNCTION21TECHNICAL CHANGESMXZ-18LV- →MXZ-18NV-

20PERFORMANCE CURVESThe standard data contained in these specifications apply only to the operation of the air conditioner, that is one indoor unitwit

219.1.Capacity and input correction by inverter output frequency (OUTDOOR UNIIT:MXZ-18NV)NOTE 1 : Inverter output frequency : COOL 58Hz,HEAT 58HzNOTE

229.2.Capacity and input correction by inverter output frequency (OUTDOOR UNIIT:MXZ-18NV)NOTE 1 : Inverter output frequency : COOL 58Hz,HEAT 40HzNOTE

239.3.Outdoor low pressure and outdoor unit current 9.3.1.07-class unit in single operation(OUTDOOR UNIT : MXZ-18NV) NOTO:The unit of pressure has bee

249.3.2.09-class unit in single operation (OUTDOOR UNIT : MXZ-18NV)NOTO:The unit of pressure has been changed to MPa on the international system of un

259.3 .3. 12-class unit in single operation (OUTDOOR UNIT : MXZ-18NV)NOTO:The unit of pressure has been changed to MPa on the international system of

269.4.Outdoor low pressure and outdoor unit current 9.4.1.07-class unit in single operation (OUTDOOR UNIT : MXZ-32NV)NOTO:The unit of pressure has bee

279.4.2.09-class unit in single operation (OUTDOOR UNIT : MXZ-32NV)NOTO:The unit of pressure has been changed to MPa on the international system of un

289.4.3. 12(13)-class unit in single operation (OUTDOOR UNIT : MXZ-32NV)NOTO:The unit of pressure has been changed to MPa on the international system

299.4.4. 18-class unit in single operationNOTO:The unit of pressure has been changed to MPa on the international system of units(SI unit system).The c

33INDOOR / OUTDOOR CORRESPONDENCE TABLE❈There is no combination other than this table.MXZ-32NV- E2MXZ-18NV- E2OUTDOOR UNITCombination of the connectab

30MICROPROCESSOR CONTROL10CompressorsecondarycurrentCompressorprimarycurrentOutdoor unitmicroprocessorDrivecircuitCompressorTransistormoduleFit temper

31PowerfactorIndoor unitmicroprocessorSSR SSRSSRDrivecircuitTransistormoduleIndoor UnitAIndoor UnitDIndoor UnitCIndoor UnitBGas pipetemperaturethermis

32No. Item Details1 LEV control Linear expansion valve (LEV) is controlled by "Thermostat ON" commands given from each unit.❈ For the differ

33No. Item Details① LEV opening correction by suction superheat(Suction superheat) = (Suction temperature) - (Evaporation temperature)The LEV opening

34The outdoor fan turns ON according to "Compressor ON" commands given from each indoor unit.❈ The outdoor fan is controlled at Highspeed fo

35No. Item Details5 Operationalfrequency rangeCompressor operational frequency range① COOLINGNumber ofoperating unitMinimumDRY modeMaximumRatingTotal

36No. Item DetailsCompressor operational frequency range➁ HEATING6 Defrosting inheating<Conditions to start defrosting>The system starts defrost

37No. Item Details<Protection details>a) In COOL or DRY mode• The 2 - way valve opens.• The compressor operational frequency decreases at a rate

38No. Item Details8 Dischargetemperatureprotection• The compressor ON/OFF and operational frequency are controlled according to the dischargetemperatu

39TROUBLESHOOTING1111.1 Cautions on troubleshooting11.1.1 Before troubleshooting, check the followings :1) Check the power supply voltage.2) Check the

4INDOOR UNITS COMBINATION4Outdoor unitpower consumption(kW)07091207+1209+09Indoor unitscombinationUnit BUnit ACooling capacity (kW)Total220V 240VCurre

40Outdoor power systemabnormalityWhen the compressor operation has been interrupted by overcurrentprotection continuously three times within 1 minute

41Frequency drop by currentprotectionWhen the outdoor unit input current exceeds 22.5 A, the compressoroperates at reduced frequency.These symptoms do

42(2) Checking the mis-wiring and serial signal error (Only MXZ-32NV)<The outdoor unit does not operate.>Single or repeated blinks appears on th

43Part name Check method and criterionMeasure the resistance using a tester.(Part temperature -10°C ~ 40°C)(3) Troubleshooting the components (Simple

44Be sure to use the analog tester for measurement.• With the lead wire disconnected, activate the inverter and check the balance of voltage between t

45Disconnect the lead wires and check the resistance between the compressor terminals.<Measuring points>Measure the AC voltages at the following

46Outdoor thermistor abnormalityMXZ-32NVDisconnect the connectors CN661, CN662 and CN663 from the outdoor controller.(Check the characteristic of ther

47The outdoor fan motor remains stopped.<MXZ-32NV>Disconnect the relay connector. Disconnect the connector (lead wire)between the compressorand

48No heating/coolingOpen statusTurn on power to the outdoor unit andpress the emergency switch for coolingor heating operation.•Three minutes after th

49MXZ-18NV - MXZ-18NV -Ourdoor unit electronic control P.C. boardE2E1Electronexpansionvalve12V DC pulseshapeEvaporationtemperaturetemperaturethermisto

5070912(13)1807+0707+0907+12(13)07+1809+0909+12(13)09+1812(13)+12(13)12(13)+1818+1807+07+0707+07+0907+07+12(13)07+07+1807+09+0907+09+12(13)07+09+1807+

50MXZ-18NV - MXZ-18NV -Relay P.C. boardE2E1{Short : NormalOpen : Abnomal{220-240V ACFuse 3.15A

51TEST POINT DIAGRAM AND VOLTAGEMXZ-32NV - MXZ-32NV -Electronic control P.C.boardE2E1Fin temperature thirmistorGas pipe temperature thirmistorEvaporat

52Noise filter P.C.boardI.P.M. P.C.boardRelay P.C.board{{{{Short12V DCHigh pressure switch12V DC{12V DC{12V DC{320V DC{230V ACOUTPUT{230V AC INPUT{OUT

53OPERATING PROCEDURE PHOTOSRemoving the compressor(1) Remove the top panel.(2) Remove the service panel and release the gas.(3) Remove the rear panel

54OPERATING PROCEDURE PHOTOSRemoving the outdoor fan motor(1) Remove the top panel, service panel, and front panel.(2) Disconnect the connector CN63,T

55OPERATING PROCEDURE PHOTOS1.Removing the compressor(1)Remove the screws fo the service panel, and remove it.Release refrigerant gas.(2)Remove the sc

56OPERATING PROCEDURE PHOTOS3.Removing the 4-way valve(1)Remove the screws of the top panel , and remove it.(SeePhoto 1.)(2)Remove the service panel,r

57OUTDOOR UNITSTRUCTURAL PARTSMXZ-18NV - MXZ-18NV -E2E11234567891011121314M21 LL4 232M21 LL4 521M21 LL4 297M21 LL4 245R01 A00 662M21 LL4 24

58OUTDOOR UNITFUNCTURAL PARTSMXZ-18NV - MXZ-18NV -E2E1Part number that are circed is not shown in the illustration.1234567891011121314M21 LL4 501T2W

59OUTDOOR UNITELECTRICAL PARTSMXZ-18NV - MXZ-18NV -E2E1151619Part number that are circed is not shown in the illustration.1234567891011121314151617181

6Indoor unitscombinationUnit A Unit B Unit C Unit DHeating capacity (kw)TotalOutdoor unitpower consumption(kw)Current(A)Powerfactor(%)220V 240V9090909

60Part of circled number is not shown in the figure.1234567891011121314151617181920M21 17A 501T2W E40 301T2W E40 452M21 17A 447M21 17A 443M2

61OUTDOOR UNIT FUNCTIONAL PARTSMXZ-32NV - MXZ-32NV -E2E11234567891011121314151617181920M21 17A 232M21 17A 245M21 17A 249M21 17A 297T2W E40

14 OPTIONAL PARTS14.1. Different-diameter pipeUnit : mm (inch)For different-diameterpipesMXZ-32NVMAC-454JPMAC-455JPMAC-456JPModel name51H-45451H-45551

7NOTE: Electrical data is for outdoor unit only.070912(13)1807+0707+0907+12(13)07+1809+0909+12(13)09+1812(13)+12(13)12(13)+1818+1807+07+0707+07+0907+0

8Indoor unitscombinationUnit A Unit B Unit C Unit DHeating capacity (kw)TotalOutdoor unitpower consumption(kw)Current(A)Powerfactor(%)220V 240V9090909

9SPECIFICATION5TEST CONDITIONS COOLING INDOOR DB27.0°C WB19.0°COUTDOOR DB35.0°C WB24.0°CHEATING INDOOR DB20.0°C OUTDOOR DB 7.0°C WB 6.0°C✽