LG Electronics AS-W126URH1/UBH1/UWH1/UMH1 Air Conditioner User Manual


 
74 Room Air Conditioner
Turn off main power
Check the wire connection of PTC Heater (Refer to Wiring Diagram)
Check the connecting condition of CN-PTC connector on the indor DC P.C.B Ass'y.
Check the soldering condition of CN-PTC connector on the indoor DC P.C.B Ass'y.
Check the Heater driving Circuit.
Check the pattern between MICOM Pin No.
48
IC02M Pin No.
7
IC02M Pin No.
10
CN-PTC
The heater does not operate at all.
Trouble 6
If there is no problem result of all above check.
Inner side disconnection of PTC Heater unit or restriced operating condition of PTC Heater
(pipe temp. is over 45°C, defrosting operation, compressor off, indoor fan off).
Troubleshooting Guide