LG GHP SUPER Installation Manual page 66

SELF-DIAGNOSIS FUNCTION
66
Display
Fan operation failure error
79
Main PCB EEPROM error
86
Fan PCB EEPROM error
87
Communication Error Between Master
104
Outdoor Unit and Other Outdoor Unit
Fan board communication error
105
Fan PCB IPM Fault error
106
Fan DC Link low-voltage error
107
Fan PCB communication error
108
Liquid pipe temperature sensor error
113
Supercooling outlet temperature sen-
115
sor error
External PCB communication error
145
4Way valve transfer failure
151
Operation failure
152
Engine RPM low error
153
Engine RPM high error
154
Coolant temperature high error
155
Hydraulic pressure switch error during
156
operation
Engine oil change warning
157
Coolant pump electric current error
158
Starter Motor electric current error
159
Coolant temperature low error
160
RPM difference error
161
Error types Cause of error
Fan operation error
Main PCB EEPROM Access error
Fan PCB EEPROM Access error
Failing to receive Slave Unit signal at main
PCB of Master Outdoor Unit
Communication error with the Fan PCB in the
Inv PCB
H/W excess current of Fan PCB
Fan PCB detects the DC Link voltage drops
below the limit voltage
Communication error with the Main PCB in
the Fan PCB
Liquid pipe temperature sensor disconnection
or short circuit
Supercooling outlet temperature sensor dis-
connection or short circuit
Communication error between the Main and
the External PCB
4Way valve transfer failure
It occurs in case of fuel gas error/starter
error/ignition plug error/inlet air blocked
It occurs in case of fuel gas error/starter
error/ignition plug error/inlet air blocked
ECU/throttle fuel control valve error
Coolant flow error (coolant pump/engine 3-
phase valve/plate 3-phase valve error)
Insufficient engine oil
1. It indicates the need for regular mainte-
nance (warning before 10,000 hours)
2. after 10,500 hours from the warning, the
engine will go out of operation
Bubbles in coolant/sludge in the pump and fire
damage
Sludge built up in the engine or combustion
damage on the motor
Temperature sensor error
ECU data error/engine tracking error