Common problem
SOURCE: Error C5 LG Art Cool Split System Air Conditioner
Probably a capacitor in the either the compressor or outdoor fan. Don't know if they are dual capacitor or each has it's own. This is just according to the other posts on this site. I would call in a tech to have a look at it. Should be able to diagnose this in about 10 minutes.
SOURCE: LG Inverter Air Conditioner showing CH 02 what can I do?
The model number would be on the right hand side of the outdoor unit and same on the indoor unit if it is a midwall split. If it is a flat cassette cieling type you may need to open the grill, which is simply two little levers either side of the grill, and the grill will swing open. Without the model number it is difficult to give accurate info. However, I can offer the following. One, check the condensate drain. You can just blow into the drain pipe from the outside and this sometimes clears clogged mud in the drainpan. Or two, error reading can also come from phase failure (in the case of a three phase unit) or power related problem. This can be solved by switching off the mains and then switching on again to reset. If you have a phase failure you would need an electrician to confirm that the power supply is good. Unless you have a volt meter.
SOURCE: LG air conditioner 24awn error code message Ch 6
CH-06 REFERS Indoor unit coil sensor fault. Disconnect from PCB measure resistance. 10 kOhm at 10C and 4 kOhm at 30C. if not replace sensor. THANKS.
SOURCE: LG air condotioner with a CH5 error code
CH-05-Comms Error, check your wiring, remove external pumps. Split/Multi - check volts from terminal N to 3 = 0 - 65 Vdc, Multi V - 4 Vdc terminals 3 and 4
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