Mitsubishi Electronics Complete Service Manual for MSZ-FD25VA and MSZ-FD35VA Air Conditioners

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

INDOOR UNIT

SERVICE MANUAL

Wireless type

Models

MSZ-FD25VA - E1 MSZ-FD25VAS - E1 MSZ-FD35VA - E1 MSZ-FD35VAS - E1

No. OBH488

Outdoor unit service manual

MUZ-FD·VA Series(OBH489)

MXZ-A·VA Series (OB377)

MXZ-8A140A (OC316)

CONTENTS

1. TECHNICAL CHANGES ····································3

2. PART NAMES AND FUNCTIONS······················4

3. SPECIFICATION·················································5

4. NOISE CRITERIA CURVES ·······························6

5. OUTLINES AND DIMENSIONS ·························7

6. WIRING DIAGRAM ············································7

7. REFRIGERANT SYSTEM DIAGRAM ················8

8. SERVICE FUNCTIONS ······································9

9. MICROPROCESSOR CONTROL ····················11

10. TROUBLESHOOTING······································20

11. DISASSEMBLY INSTRUCTIONS·····················36

PARTS CATALOG (OBB488)

NOTE:

RoHS compliant products have <G> mark on the spec name plate.

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Contents MSZ-FD25VA E1 MSZ-FD25VAS E1 MSZ-FD35VA E1 MSZ-FD35VAS E1 Page Technical Changes See control operation Part Names and FunctionsSpecifications and rating conditions of main electric parts SpecificationIndoor model MSZ-FD25VA MSZ-FD25VAS Noise Criteria CurvesWiring Diagram Outlines and DimensionsUnit mm Unit mm Refrigerant System DiagramTimer Short Mode Service FunctionsP.C. Board Modification for Individual Operation J1 J2Auto Restart Function Remote ControllerOperation OPERATE/STOP Microprocessor ControlCool Operation Auto Change Over ··· Auto Mode OperationDRY Operation Heat OperationOutdoor Unit MXZ series Auto Vane OperationHorizontal vane COOL/DRY Heat Vertical vaneSee Control Operation Area SettingSee Sensor Daytime Operation and operating range Plasma OperationTimer Operation Clean OperationProgram Timer Emergency Operation switch E.O.SW Minute Time Delay OperationEMERGENCY/TEST Operation Troubleshooting OFF Failure Mode Recall FunctionPlasma operation check Flow chart of Plasma operation failure mode recall functionPlasma operation failure mode table Indoor unit failure mode tableStart Instruction of TroubleshootingAn abnormality other than above mentioned is detected Troubleshooting Check TablePlasma Trouble Criterion of Main Parts Power lamp flashes 3-time Indoor fan does not operate Troubleshooting FlowYes Check of indoor P.C. board and indoor fan motor How to check miswiring and serial signal error Check of installation of the horizontal vane Electromagnetic noise enters into TV sets or radios Indoor electronic control P.C. board Test Point Diagram and VoltageSW P.C. Board CN1 Removing the panel Photo Disassembly InstructionsPower monitor receiver Removing the electrical box Photo Removing the nozzle assembly PhotoRemoving the vertical vane motor unit Photo Removing the indoor fan motor and the line flow fan Photo Removing the horizontal vane motor PhotoSpecifications subject to change without notice