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33
Troubleshooting
Error Codes
Error Description
Action
E6
Compressor lock/start-up
error
1. Check with inverter checker.
2. Check the EXV.
E7
Outdoor DC fan motor lock
1. Check the fan motor connection.
2. Check if foreign matters exist around or in the fan.
E8
Ac input over current
1. Measure the input current.
2. Check the main circuit electrolytic capacitor.
3. Check with inverter checker.
4. Check discharge pressure.
5. Check the installation condition.
EA
4-way valve error
1. Check 4WV coil connection.
2. Check the continuity of the 4WV coil and harness.
3. Check the 4WV switching output.
4. Check sensor connection.
5. Check sensor resistance value.
6. Check the refrigerant line on blockage or shortage.
F3
Discharge pipe overheat
1. Check the discharge pipe sensor.
2. Check the EXV.
3. Check the refrigerant line on blockage or shortage.
F6
Heat exchanger overheat
1. Check the installation space.
2. Check the outdoor fan.
3. Check the EXV.
4. Check the coil sensor.
H0
Compressor sensor
system abnormality
1. Check the reactor connection.
2. Check the compressor connection.
3. Measure the resistance value between the reactor
terminals.
4. Measure the resistance value between the compressor
terminals.
H6
Position sensor
abnormality
1. Check for short circuit.
2. Check the electrolytic capacitor voltage.
3. Check compressor harness wire.
4. Check with inverter checker.
H8
AC current sensor error
1. Restart the system.
2. Check capacitor voltage.
3. Measure the rectifier input voltage.
4. Check compressor harness wire.
5. Check with inverter checker.
H9
Outdoor air thermistor
short/open
1. Check the sensor connection.
2. Check the sensor resistance value.
J3
Compressor discharge
pipe thermistor short/open/
misplaced
1. Check the sensor connection.
2. Check the sensor resistance value.
3. Check indoor coil sensor resistance value.