Mitsubishi Electronics service manual MSZ-FD09NA MSZ-FD12NA

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Revision A:

•3. SPECIFICATION has been corrected. Please void OBH497.

INDOOR UNIT

SERVICE MANUAL

No. OBH497

REVISED EDITION-A

Wireless type

Models

MSZ-FD09NA

MSZ-FD12NA

Outdoor unit service manual

MUZ-FD•NA Series (OBH498)

MXZ-A·NA Series (OB444)

CONTENTS

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

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

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

4. OUTLINES AND DIMENSIONS ························ 7

5. WIRING DIAGRAM············································ 8

6. REFRIGERANT SYSTEM DIAGRAM ··············· 9

7. SERVICE FUNCTIONS ··································· 10

8. MICROPROCESSOR CONTROL ··················· 12

9. TROUBLESHOOTING····································· 22

10. DISASSEMBLY INSTRUCTIONS···················· 36

PARTS CATALOG (OBB497)

NOTE:

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

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Contents MSZ-FD09NA MSZ-FD12NA Specification has been corrected New model Part Names and Functions AccessoriesWeight External ﬁnish Power supply Phase, Hz 208/230Remote controller Indoor modelOutlet AIR Speed and Coverage Range Operating RangeUnit inch Outlines and DimensionsAir Air outWiring Diagram Unitinch Refrigerant System DiagramRefrigerant flow in cooling Refrigerant flow in heating Timer Short Mode Service FunctionsHow to modify the remote controller P.C. board P.C. Board Modification for Individual OperationAuto Restart Function How to release Auto Restart FunctionOperation Refer to Microprocessor ControlLamp lights during operation Lamp blinks in abnormal conditionDRY Operation Cool OperationHeat Operation Mode selection Auto Change Over ··· Auto Mode OperationAuto Vane Operation Outdoor Unit MXZ seriesFeet, set the horizontal DirectionVertical vane See Control Operation Area SettingSee Sensor Enlarged view of i-see SensorNighttime Cold area DaytimeLighted Not lighted Center ····· Operation and operating rangeProgram Timer Changing temperature indication F/C Minute Time Delay OperationEMERGENCY/TEST Operation Before troubleshooting, check the following TroubleshootingLead wiring Housing point Troubleshooting procedure How to replace batteriesOFF Failure Mode Recall FunctionPower Indoor unit failure mode tableInstruction of Troubleshooting Lighted Blinking Troubleshooting Check TableArea R Power Trouble Criterion of Main Parts MSZ-FD09NAMSZ-FD12NA Check of indoor fan motor Troubleshooting FlowPage Replace the horizontal vane motor, How to check miswiring and serial signal error Electromagnetic noise enters into TV sets or radios Indoor electronic control P.C. board Test Point Diagram and VoltageSW P.C. Board Power monitor receiver P.C. board Monitor P.C. board Removing the panel Photo Disassembly InstructionsOpen the rear cover of the power monitor receiver P.C Operating Procedure PhotosRemoving the electrical box Photo Removing the nozzle assemblyPhoto Removing the vertical vane motor unit Correct positionRemoving the indoor fan motor and the line flow fan Photo Removing the horizontal vane motor PhotoMade in Japan