Black & Decker service manual MUZ-FD09NA MUZ-FD09NA- U1 MUZ-FD12NA MUZ-FD12NA- U1

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OUTDOOR UNIT

SERVICE MANUAL

HFC

utilized

No. OBH498

R410A

Wireless type

Models

MUZ-FD09NA

MUZ-FD09NA- U1

MUZ-FD12NA

MUZ-FD12NA- U1

Indoor unit service manual

MSZ-FD•NA Series (OBH497)

CONTENTS

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

2. PART NAMES AND FUNCTIONS····················· 3

3. SPECIFICATION················································ 4

4. OUTLINES AND DIMENSIONS ························ 6

5. WIRING DIAGRAM············································ 7

6. REFRIGERANT SYSTEM DIAGRAM ··············· 8

7. DATA·································································· 9

8. ACTUATOR CONTROL··································· 15

9. SERVICE FUNCTIONS ··································· 16

10. TROUBLESHOOTING····································· 16

11. DISASSEMBLY INSTRUCTIONS···················· 32

PARTS CATALOG (OBB498)

NOTE:

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

TM

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Contents MUZ-FD09NA MUZ-FD09NA- U1 MUZ-FD12NA MUZ-FD12NA- U1 Page Part Names and Functions Technical ChangesMUZ-FD09NA MUZ-FD12NA SpecificationOperating Range Test conditionRequired Space Outlines and DimensionsWiring Diagram MAX. Refrigerant Piping Length and MAX. Height Difference Refrigerant System DiagramData MUZ-FD09NA MUZ-FD12NA Performance Curve CoolingHeating MUZ-FD09NACondensing pressure Condensing Pressure Cooling65 70F MSZ-FD09NA MSZ-FD12NA Standard Operation DataCorrection of Heating capacity Test RUN Operation How to operate fixed-frequency operationOutdoor FAN Motor Control Actuator ControlR.V. Coil Control Relation Between Main Sensor and ActuatorTroubleshooting Service FunctionsChange in Defrost Setting PRE-HEAT Control SettingOFF Failure Mode Recall FunctionOperational procedure Outdoor unit failure mode table Troubleshooting Check Table Page WHT RED Trouble Criterion of Main Parts MUZ-FD09NAMUZ-FD12NACheck of open phase How to check inverter/ compressorTroubleshooting Flow Check of compressorCheck of compressor operation time Check of compressor windingCheck of compressor start failure Unit operates Heat mode even if it is set to Cool mode Unit operates Cool mode even if it is set to Heat modeCheck of outdoor thermistors Check of R.V. coilCheck of outdoor fan motor Check of power supplyCheck of LEV Expansion valve Emergency Operation Check of inverter P.C. boardPage Outdoor unit Electromagnetic noise enters into TV sets or radiosInverter P.C. board Test Point Diagram and VoltageRemoving the cabinet Photo Disassembly InstructionsPhoto 4 inverter assembly Removing the inverter assembly, inverter P.C. board PhotoPhoto Removing the discharge temperature thermistor Removing R.V. coilRemoving the compressor and 4-way valve Removing outdoor fan motor PhotoPage New publication, effective Jan