LG Hydro Kit - Troubleshooting

Test Run
74 Hydro Kit
If Hydro Kit operates not properly or it does not start operation, please check following list.
Troubleshooting
Error No.
Error Type Main Reasons
01 Air temperature sensor error
Air temperature sensor disconnection or short
circuit
02 Gas side temperature sensor error
Gas side temperature sensor disconnection or
short circuit
03
No communication between wired
remote controller & indoor unit
The remote controller does not receive the signal
from indoor unit during specific time
05
Indoor unit & outdoor unit
communication error
No signal communication between indoor unit &
outdoor unit
06 Liquid side temperature sensor error
Liquid side temperature sensor disconnection or
short circuit
08 Water tank temperature sensor error
Water tank temperature sensor disconnection or
short circuit
09 Indoor unit EEPROM error
Communication between the micro-processor &
the EEPROM / Error due to EEPROM damage
11
Indoor unit & inverter PCB
communication error
No signal communication between indoor unit &
inverter PCB
12 Inverter PCB error Error occurrence in inverter PCB
13
Solar thermal temperature sensor
error
Solar thermal temperature sensor disconnection
or short circuit
14 Flow switch error Abnormal working of flow switch
15 Water pipe overheated Water outlet temperature is above 85 ℃ (185 °F)
16
Water inlet & outlet temperature
sensor error
Water inlet & outlet temperature sensor
disconnection or short circuit simultaneously
17 Water inlet temperature sensor error
Water inlet temperature sensor disconnection or
short circuit
18
Water outlet temperature sensor
error
Water outlet temperature sensor disconnection or
short circuit
187 Hydro-Kit P.HEX bursting error
Inlet water temperature is below 5 degree or
water temperature error during defrosting
operation.