Vermont Casting service manual MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA

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INDOOR UNIT

SERVICE MANUAL	No. OBH501

Wireless type

Models

MSZ-D30NA

MSZ-D36NA

MSY-D30NA

MSY-D36NA

Outdoor unit service manual

MUZ-D•NA Series (OBH502)

MUY-D•NA Series (OBH502)

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····································· 19

10. DISASSEMBLY INSTRUCTIONS···················· 31

PARTS CATALOG (OBB501)

NOTE:

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

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Contents MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA Page Technical Changes Part Names and Functions AccessoriesSpecification Outlet AIR Speed and Coverage Range Operating RangeMSZ-D36NA MSY-D30NA MSY-D36NA Outlines and DimensionsWiring Diagram Unitinch Refrigerant System DiagramTimer Short Mode Service FunctionsHow to modify the remote controller P.C. board P.C. Board Modification for Individual OperationOperation Auto Restart FunctionMicroprocessor Control Operation Indicator lampHeat Operation MSZ Cool OperationFAN Operation MSY Feel Control Operation MSYMode selection Auto Change Over ··· Auto Mode Operation MSZFuzzy control Auto Vane Operation 3 4 Swing 5 Vertical vaneProgram Timer Changing Temperature Indication F /C Minute Time Delay OperationEMERGENCY/TEST Operation Before troubleshooting, check the following TroubleshootingTroubleshooting procedure How to replace batteriesOFF Failure Mode Recall FunctionEration Indica Indoor unit failure mode tableStart Instruction of TroubleshootingLighted Blinking Not lighted Troubleshooting Check TableTrouble Criterion of Main Parts Check of indoor fan motor Troubleshooting FlowCheck of remote controller and receiver P.C. board Indoor electronic control P.C. board How to check miswiring and serial signal error Electromagnetic noise enters into TV sets or radios Power monitor receiver P.C. board Test Point Diagram and VoltageSW P.C. board Board, the power monitor receiver P.C. board and the SW Disassembly InstructionsRemoving the panel Removing the electrical box, the electronic control P.CRemoving the vertical vane motor Removing the nozzle assemblyRemoving the horizontal vane motor Removing the line flow fan and the indoor fan motor Page Page Distributed in Feb . No. OBH501 New publication, effective FebMade in Japan