Contents
Fault List. . . . . . . . . . . . . . . . . . . . . . . . 3
Outdoor Unit Clearing . . . . . . . . . . . . . . . . . 5
Failures with Error Code . . . . . . . . . . . . 5
Failures With No Error Code . . . . . . . . . 26
Sensor Values . . . . . . . . . . . . . . . . . . . . 30
Outdoor Unit Temperature Sensors. . . . . . 30
Compressor Operating Checks . . . . . . . . . . . 36
Refrigeration Circuit Leak Test . . . . . . . . . . . 36
Troubleshooting . . . . . . . . . . . . . . . . . . . 36
Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Service parts information . . . . . . . . . . . . . . 30
Information 1 : Compressor. . . . . . . . . . 30
Information 2 : Inverter compressor . . . . . 31
Information 3 : Electronic expansion valve [EEV,
EEV(INJ)] . . . . . . . . . . . . . . . . . . . 32
Information 4 : Solenoid valve (SV). . . . . . 33
Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Electrical System . . . . . . . . . . . . . . . . . . 34
Outdoor Unit Overvoltage. . . . . . . . . . . 34
Inspection of the Power Transistor
Module (Main board) . . . . . . . . . . . . . 34
Refrigeration System . . . . . . . . . . . . . . . . 34
Unit produces no heat . . . . . . . . . . . . 34
Outdoor unit does not defrost. . . . . . . . . 35
Crankcase heater. . . . . . . . . . . . . . . 36
Annual Maintenance Services. . . . . . . . . . . . . . . . . . . . . . . . . 36
Outdoor unit . . . . . . . . . . . . . . . . . . . . . 36
Electrical. . . . . . . . . . . . . . . . . . . . . . . 36
Operating checks . . . . . . . . . . . . . . . . . . 36
Disassembly Process of Outdoor Unit . . . . . . . . . . . . . . . . . . . . 37
Single phase type . . . . . . . . . . . . . . . . . . 37
Appearance. . . . . . . . . . . . . . . . . . 37
Service panel removal . . . . . . . . . . . . 37
Top panel removal . . . . . . . . . . . . . . 37
MAIN PCB, FILTER PCB, and INDICATOR PCB
removal . . . . . . . . . . . . . . . . . . . . 38
FAN MOTOR removal . . . . . . . . . . . . 40
VALVE COVER removal . . . . . . . . . . . 40
RIGHT PANEL removal . . . . . . . . . . . . 41
THERMISTOR removal. . . . . . . . . . . . 41
SOLENOID COIL removal . . . . . . . . . . 42
EEV COIL removal . . . . . . . . . . . . . . 43
PRESSURE SENSOR removal. . . . . . . . 43
COMPRESSOR removal . . . . . . . . . . . 44
3-phase type. . . . . . . . . . . . . . . . . . . . . 46
Appearance. . . . . . . . . . . . . . . . . . 46
Service panel removal . . . . . . . . . . . . 46
Insulation sheet removal . . . . . . . . . . . 46
Main PCB removal . . . . . . . . . . . . . . 47
INVERTER, PFC, FILTER, and CAPACITOR
PCB removal . . . . . . . . . . . . . . . . . 47
FAN MOTOR removal . . . . . . . . . . . . 50
TOP PANEL removal . . . . . . . . . . . . . 50
PIPE COVER FRONT removal . . . . . . . . 50
RIGHT PANEL removal . . . . . . . . . . . . 51
REACTOR removal . . . . . . . . . . . . . . 51
THERMISTOR removal. . . . . . . . . . . . 51
SOLENOID COIL removal . . . . . . . . . . 52
EEV COIL removal . . . . . . . . . . . . . . 53
PRESSURE SENSOR removal. . . . . . . . 53
COMPRESSOR removal . . . . . . . . . . . 54
Precautions for exchange of refrigerant-cycle-parts. 56
Maintenance document "1546 - EN"
Outoor unit - excellia (duo) WOYGxxxLCT_WOYKxxxLCT
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