LG Therma V AHBW Series - Error Code List; Main PCB Assembly

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2.2 Error Code List
CAUTION
Precaution in service or check
Even after stopping the operation of product, it takes some time to discharge the remaining electricity of the elec-
trolytic capacitor that was charged early. Before conducting a checking or repairing job, pull out the plug out of the out-
let and make sure that the lamp on the control board outdoor unit is off.
• Notice of error code
-
Slight / Heavy / Option Troubles : lowercases ‘ch’ + code no.
- Errors : capital letters ‘CH’ + code no.
- Slight Trouble: *
- Heavy Trouble: **
- Option Trouble: ***
- Error: ****
Main PCB assembly(Heater)
Error
Code
Description Main Reasons
01 * Problem in Remote Room Air sensor Remote room air sensor disconnection or short circuit
02 ** Problem in Refrigerant (Inlet side) sensor Refrigerant Inlet side sensor disconnection or short circuit
03 ****
Bad communication between control panel and unit Connector connection error or connection wire break
05 ****
Bad communication between Indoor unit and
PCB(Heater) Unit does not receive signal from PCB(Inverter)
Main PCB assembly(Inverter) and Main PCB assembly(Heater)
06 ** Problem in Refrigerant (Outlet side) sensor Refrigerant Outlet side sensor disconnection or short circuit
08 *** Problem in Water Tank sensor Water tank sensor disconnection or short circuit
09 **** PCB Program (EEPROM) Fault Electrical or mechanical damage at the EEPROM
13 *** Problem in Solar-thermal sensor Solar-thermal sensor disconnection or short circuit
14 **** Problem in Flow Switch Folw switch is open while internal water pump is working
15 **** Water pipe overheated Leaving water temperature is above 57℃
16 **** Problems in sensors An error cord 17,18,19 error has occurred at the same time.
17 * Problem in Water-inlet sensor Water-Inlet sensor disconnection or short circuit
18 * Problem in Water-outlet sensor Water-outlet sensor disconnection or short circuit
19 * Problem in Water-interlim sensor Water-interlim sensor disconnection or short circuit
20 **** Electric heater overheated Leaving water temperature is above 80℃