Troubleshooting For Error Code - LG THERMA V AHBW036H0 Installation Manual

Troubleshooting for Error Code

Code
Description
No.
1 Problem in remote room air sensor
2 Problem in refrigerant (inlet side) sensor
6 Problem in refrigerant (outlet side) sensor
8 Problem in water tank sensor
16 Problems in sensors
17 Problem in water-inlet sensor
18 Problem in water-outlet sensor
Bad communication between remote
3
controller and unit.
5
Bad communication between Main PCB and
Inverter Main PCB of the unit.
53
9 PCB program (EEPROM) fault
14 Problem inlet water flow rate
15 Water pipe overheated
Check Points, Maintenance and Troubleshooting
Cause
• Incorrect connection between
sensor and Main PCB.
• Main PCB fault
• Sensor fault
• Incorrect connection between
sensor and Main PCB
• Main PCB fault
• Sensor fault
• The connector for transmission is
disconnected
• The connecting wires are
misconnected
• The communication line is broken
• Inverter Main PCB is abnormal
• Main PCB assembly is abnormal
• Electrical or mechanical damage a
the EEPROM
• Water has stopped flowing into
unit or not enough water
flowing(Min 5LPM) while unit is
working.
• Water pipe system is overheated
by external devices.
• Leaving water temperature is
above 67 ℃
Normal Condition
• Resistance: 10 kΩ at 25
centigrade (unplugged) → for
Remote room air sensor
• Resistance: 5 kΩ at 25 centigrade
(unplugged) → for all sensors
EXCEPT remote room air sensor
• Voltage: 2.5 V DC at 25 centigrade
(plugged) (for all sensors)
• Refer resistance-temperature table
to check in different temperature
• Wire connection between remote
controller and Main PCB should be
tight
• Output voltage of PCB should be
12 V DC
• Wire connection between remote
control panel and Main PCB
should be tight.
• This error can not be permitted
• Water pump is interfaced normally
with unit and water flow rate
keeps level
• Leaving water temperature is
under 55 °C
Installation Manual 67