LG ARWN038GA2, Руководство по обслуживанию, Страница: 44 / 81

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Self-diagnosis function
Display Error item Root cause of error
Outside unit
2 6 1
Outside unit inverter compressor opera-
tion failure error Initial operation failure due to outside unit inverter com-
pressor error
2 8 1
Outside unit inverter DC link over-voltage
error Compressor turned off due to outside unit inverter DC volt-
age over-charge
2 9 1
Outside unit inverter compressor over-cur-
rent Outside unit inverter compressor error or operating com-
ponent (IPM) error operation
3 1 1
Outside unit inverter CT under-current
error Compressor turned off due to outside unit inverter CT
under-Current
3 2 1
Outside unit inverter compressor dis-
chrage temperature ove-rise
Compressor turned off due to outside unit inverter comp-
pressor discharge temperature over-rise
Flow rate insufficiency or flow switch trouble of outside unit
3 4 1 Outside unit high pressure over-rise
Compressor turned off due to outside unit high pressure
over-rise
Flow rate insufficiency or flow switch trouble of outside unit
3 5 1 Outside unit low pressure over-drop
Compressor turned off due to outside unit low pressure
over-drop
3 6 1 Low pressure ratio Pressure ratio is under limit
3 9 1
Communication error between Outside
unit PFC and inverter board Outside unit inverter compressor current detection (CT)
sensor disconnection or short circuit
4 0 1
Outside unit inverter compressor CT sen-
sor error Outside unit inverter compressor current detection (CT)
sensor disconnection or short circuit
4 1 1
Outside unit inverter compressor dis-
charge temperature sensor error Outside unit inverter compressor discharge temperature
sensor disconnection or short circuit
4 2 1 Outside unit under-voltage sensor error
Outside unit under-vlotage sensor disconnection or short
circuit
4 3 1 Outside unit over-voltage sensor error
Outside unit over-vlotage sensor disconnection or short
circuit
4 4 1 Outside unit air temperature sensor error
Outside unit air temperature sensor disconnection or short
circuit
4 5 1
Outside Unit Heat Exchanger
Temperature Sensor (A) Fault Outside Unit Heat Exchanger Temperature Sensor (A)
Open or Short
4 6 1
Outside unit suction temperature sensor
error Outside unit suction temperature sensor disconnection or
short circuit
5 1 1
Over-capacity
(Indoor unit capacity sum is excessive)
connection
Excessive connection of indoor unit connection display
value (Different from outside unit)
5 2 1
Communication error with outside unit
inverter contrller When the inverter controller signal is not received from the
outside unit inverter controller
5 3 1
Communication error with outside unit
contrller and indoor unit When the indoor uint control signal is not received from
the outside unit inverter controller