Error Code List; Main Pcb Assembly - LG Therma V AHBW Series Service Manual

2.2 Error Code List

Main PCB assembly(Heater)
Error
Code
01 * Problem in Remote Room Air sensor
02 ** Problem in Refrigerant (Inlet side) sensor
03 **** Bad communication between control panel and unit
Bad communication between Indoor unit and
05 ****
Main PCB assembly(Inverter) and Main PCB assembly(Heater)
06 ** Problem in Refrigerant (Outlet side) sensor
08 *** Problem in Water Tank sensor
09 **** PCB Program (EEPROM) Fault
13 *** Problem in Solar-thermal sensor
14 **** Problem in Flow Switch
15 **** Water pipe overheated
16 **** Problems in sensors
17 * Problem in Water-inlet sensor
18 * Problem in Water-outlet sensor
19 * Problem in Water-interlim sensor
20 **** Electric heater overheated
• 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: ****
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.
Description Main Reasons
Remote room air sensor disconnection or short circuit
Refrigerant Inlet side sensor disconnection or short circuit
Connector connection error or connection wire break
PCB(Heater) Unit does not receive signal from PCB(Inverter)
Refrigerant Outlet side sensor disconnection or short circuit
Water tank sensor disconnection or short circuit
Electrical or mechanical damage at the EEPROM
Solar-thermal sensor disconnection or short circuit
Folw switch is open while internal water pump is working
Leaving water temperature is above 57℃
An error cord 17,18,19 error has occurred at the same time.
Water-Inlet sensor disconnection or short circuit
Water-outlet sensor disconnection or short circuit
Water-interlim sensor disconnection or short circuit
Leaving water temperature is above 80℃
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