Mitsubishi Electronics MUZ-GB50VA service manual Operating Procedure Photos, Removing R.V. coil

Page 35

OPERATING PROCEDURE

 

PHOTOS

2. Removing the inverter assembly, inverter P.C. board

Photo 4

and power board

 

Screws of the power board assembly

(1) Remove the top panel, cabinet and service panel.

 

 

(Refer to 1.)

 

 

(2) Remove the back panel.(Refer to 1.)

 

 

(3) Disconnect the following connectors;

 

 

<Electronic control P.C. board>

 

 

CN931 and CN932 (Fan motor)

 

 

CN795 (LEV)

 

 

CN661 (Discharge temperature thermistor, defrost

 

 

thermistor and outdoor heat exchanger

 

 

temperature thermistor)

 

 

CN663 (Ambient temperature thermistor)

 

 

<Noise filter P.C. board>

 

 

CN912 (4-way valve)

 

 

(4)Remove the compressor connector.

(5)Remove the screws fixing the relay panel.

(6)Remove the inverter assembly.

(7)Disconnect all connectors and lead wires on the electronic

control P.C. board.

Screws of the relay panel

(8)Remove the electronic control P.C. board from the inverter assembly.

(9)Remove the screws fixing the power board assembly.

(10)Disconnect all connectors and lead wires on the power board.

(11)Remove the power board from the inverter assembly.

(12)Disconnect all connectors and lead wires on the noise filter P.C. board.

(13)Remove the noise filter P.C. board from the inverter assembly.

3.Removing R.V. coil

(1)Remove the top panel, cabinet and service panel.

(2)Remove the back panel. (Refer to 1.)

(3)Remove the inverter assembly. (Refer to 2.)

(4)Remove the R.V. coil. (Photo 9)

35

Image 35
Contents Revised EDITION-A R410A Refrigerant OBR01 ContentsSNB130FLDH1 Technical ChangesMUZ-GA50VA E1 SNB130FLDHMUZ-GB50VA SpecificationAccessories Part Names and FunctionsSpecifications and rating conditions of main electric parts Band Octave Noise Criteria CurvesMUZ-GB50VA Outdoor Unit Outlines and DimensionsOutdoor Unit MUZ-GB50VA Wiring DiagramUnitmm Refrigerant System DiagramCapacity and input curves Performance CurvesIndoor Unit Outdoor Unit MUZ-GB50VA Test RUN Operation How to operate fixed-frequency operationCool operation SHC SHF Input MSZ-GB50VA MUZ-GB50VAPerformance Data Cool operation Rated frequency 79Hz OutdoorOutdoor DB R.V. coil control Actuator ControlPerformance Data Heat operation Outdoor fan motor controlRelation between main sensor and actuator MUZ-GB50 TroubleshootingOFF Failure mode recall functionOperational procedure Outdoor unit failure mode table Time flash Communication error Lighting Emergency Instruction of troubleshootingIndicator OperationOperate Lightning Twice Outdoor power system Troubleshooting check table MUZ-GB50VAOnce Lighting RED ORN Trouble criterion of main parts MUZ-GB50VARED BLK BLK WHT WHT REDTroubleshooting flow How to check inverter/ compressorCheck of outdoor thermistors Check of R.V. coil When heating operation does not workCheck of outdoor fan motor Check of power supplyCheck of LEV Check of current-limiting resistorParts side Electromagnetic noise enters into TV sets or radios Discharge temperature thermistor RT62 Noise filter P.C. board CN5 Outdoor power boardCN2 CN3Removing the cabinet Photo Disassembly InstructionsMUZ-GB50VA Outdoor Unit Operating Procedure Photos Removing R.V. coil Operating Procedure PhotosRemoving outdoor fan motor Photo Ture thermistor and ambient temperature thermistorRemoving the reactor Removing the compressor and 4-way valve PhotoRoHS Parts List RoHS compliant MUZ-GB MUZ-GB50 MUZ-GB50VA Accessory