Mitsubishi Electric MXZ-2B20NA Manual de servicio

ModelsSERVICE MANUALCONTENTS1. TECHNICAL CHANGES· ·································· 22. PART NAMES AND FUNCTIONS ····················· 23. SPECIFICAT

10(2) OPERATION FunctionCoolingHeating"A" Cooling steady stateat rated compressor speed "B-2" Cooling steady state at rated compre

11MXZ-2B20NA MXZ-2B20NA -1The standard specifications apply only to the operation of the air conditioner under normal conditions.Since operating cond

1209 class(47Hz)12 class(59Hz)15 class(78Hz)Indoor unit class(Inverter output frequency)Indoor air DB temperaturedifference (degree)22.120.518.717.115

130 50 1000.51.01.52.00 50 1000.51.01.52.00501000.51.01.52.00501000.51.01.52.00501000.51.01.52.00501000.51.01.52.00501000.51.01.52.00 50 1000.51.01.52

148-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT1. 09-class unit in single operation (OUTDOOR UNIT: MXZ-2B20NA MXZ-2B20NA -1)(1) COOL operation D

152. 12-class unit in single operation (OUTDOOR UNIT: MXZ-2B20NA MXZ-2B20NA -1)(1) COOL operation65 70 75 80 85 90 95 100 105 110 1151201401501601701

163. 15-class unit in single operation (OUTDOOR UNIT: MXZ-2B20NA MXZ-2B20NA -1)(1) COOL operation65 70 75 80 85 90 95 100 105 110 1151201301401501601

17SERVICE FUNCTIONS10ACTUATOR CONTROL9Relation between main sensor and actuatorMXZ-2B20NA MXZ-2B20NA -1Discharge temperature thermistorIndoor coil th

18113. Troubleshooting procedure1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality.

19The left lamp of OPERATION INDICATORlamp (Indoor unit)OFF2-time flash3-time flash4-time flash5-time flash6-time flash7-time flash8-time flashLightin

TECHNICAL CHANGES21PART NAMES AND FUNCTIONS2MXZ-2B20NA MXZ-2B20NA -1Air outletDrain outletAir inlet(Back and side)Revision A:• MXZ-2B20NA- 1 has been

20Operation startCheck the outdoor unit LED indicator.Refer to 11-6. "Check of power supply".• Indoor unit serial signal errorRefer to 11-

21LED2LED1Outdoor electronic control P.C. board (Parts side)LightingLED1(Red) LED2(Yellow)Lighting Twice Outdoor power systemLighting 3 timesDischarge

22Primary current protectionSecondary current protectionHigh-pressure protectionDefrosting in cooling3 timesLightingDischarge temperatureprotection• C

2311-5. TROUBLE CRITERION OF MAIN PARTS MXZ-2B20NA MXZ-2B20NA -1NormalDischarge temperaturethermistor (RT62)Fin temperaturethermistor (RT64)Measure t

24 Check of power supplyOutdoor unit does not operate. Turn ON the power supply.NoYesYesNoYesNoYesNoReplace the power board.Check the connecting of

25Is there rated voltage in the power supply ?Is there any mis-wiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire ? 1

26 Check of R.V. coilNoYesNoYesNoYesNoYesNoYes1. Disconnect the lead wire leading to the compressor.2. 3 minutes after turning ON the power supply,

27 Check of LEVNoYesNoYesTurn ON the power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely.Is "click - c

28 How to check inverter/compressor• When heating, room does not get warm.• When cooling, room does not get cool.NoNoYesYesYesNoYesNoDisconnect the

29 Check of outdoor thermistors• When thermistor is abnormal. ThermistorDefrostDischarge temperatureOutdoor heat exchanger temperature Ambient tempe

3SPECIFICATION3ItemOutdoor modelIndoor type Wall (09+09) Duct (09+12)CapacityPowerconsumptionEERSEERHSPF IV (V)COPExternal finishPower supplyMax. fuse

30 The other casesIndoor unit does not operate. (different operating models in multi system)• When you try to run two indoor units simultaneously,

317006005004003002001000Resistance (kΩ)Temperature (°F)Discharge temperature thermistor (RT62)3250 68 86 104 122 140 158 176 194 212 230 248-4 14 32 5

322. Noise filter P.C. board208/230 V ACOutputF64 FUSET2AL250V{{CN901To electroniccontrol P.C. boardCN912R.V. coil208/230 V AC{CN902To powerboardCN903

33MXZ-2B20NAMXZ-2B20NA -13. Outdoor Power board(Red)(White)Connect to the compressorVoltage among phases: 5 V to 180 VConnect to the earthCN5Primary c

34DISASSEMBLY INSTRUCTIONS12(1) Slide the sleeve and check if there is a locking lever or not.(2) The terminal with this connector has the loc

35OPERATING PROCEDUREPHOTOS3. Removing the fan motor(1) Remove the top panel, the service panel, and the cabinet (Photo 1, 2).(2) Disconnect the con

OPERATING PROCEDURE PHOTOS6. Removing the reactor(1) Remove the top panel (Photo 1).(2) Remove the service panel, cabinet, back panel, and the e

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HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2009 MITSUBISHI ELECTRIC ENGINEERING CO., LTDDistributed in D

ombination09121566++09+0909+1209+1512+12ndoor units ndoor typeIICooling capacity(BTU/h) Power consumptionCurrent(A)cABUnit A Unit B Total (W)208V 230V

490807060504030201063 125 250 500 1000 2000 4000 8000APPROXIMATETHRESHOLD OFHEARING FORCONTINUOUSNOISENC-60NC-50NC-40NC-30NC-20NC-70OCTAVE BAND SOUND

Indoor units Indoor typeHeating capacity(BTU/h) Power consumptionCurrent(A)combination A BUnit A Unit B Total (W)208V 230V06 Wall 7400 7400 610 3.09 2

5OUTLINES AND DIMENSIONS5MXZ-2B20NA MXZ-2B20NA -1Unit: inchLIQ 1/4"FLAREGAS 3/8"FLAREUnit BUnit ALIQGASGASLIQ1-3/16" 1/2"13&

6WIRING DIAGRAM6MXZ-2B20NAMXZ-2B20NA -1

7Stop valve withservice portStop valveStrainer#100PowerreceiverLEV ALEV BOil separatorCompressorDefrostthermistorRT61DistributorMuffler4-way valveLEV

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

9DATA8ModelMXZ-2B20NA MXZ-2B20NA -1Indoor type Wall (09+09) Duct (09+12)Item Unit Cooling Heating Cooling HeatingTotalCapacity But/h 18,000 22,000 20