LG AC CH05 Error: Meaning and Fix
Quick answer
CH05 means the indoor and outdoor units of your LG AC are not communicating. A common cause is a tripped circuit breaker for the outdoor unit. Resetting both breakers together often clears it.
| Problem | Indoor and outdoor units not communicating |
|---|---|
| Fix it yourself? | Try a reset first |
| If it keeps coming | Connecting cable or PCB (technician) |
| Also shown as | CH 05 · CH5 |
Safety: Do not open the outdoor unit or touch its wiring yourself.
Common causes
- Outdoor unit circuit breaker tripped
- Unstable power supply
- Loose or damaged cable between indoor and outdoor units
- Fault on the indoor or outdoor control board
Fix it step by step
- Check whether the circuit breaker for the outdoor unit has tripped.
- If it has, switch off the indoor unit's breaker as well.
- Leave both breakers off for 5 minutes.
- Switch both breakers on at the same time and start the AC again.
Still showing CH05?
- LG says service is required if CH05 stays after the reset.
- If CH05 appears right after a new installation or shifting, the connecting cable is the first thing the technician should check.
हिंदी में
CH05 का मतलब है AC की अंदर और बाहर वाली यूनिट आपस में बात नहीं कर पा रहीं। अक्सर बाहर वाली यूनिट का MCB ट्रिप होता है।
- देखें बाहर वाली यूनिट का MCB गिरा तो नहीं।
- अंदर वाली यूनिट का MCB भी बंद करें।
- 5 मिनट रुकें।
- दोनों MCB एक साथ चालू करें।
Questions people ask
Is CH05 the same as CH 05 or CH5?
Yes. LG ACs show it as CH05 on the display, or as five blinks of the first LED on models without a display.
Why did CH05 come right after installation?
LG notes that CH05 right after installing or shifting points to the indoor-outdoor connection. Ask the installer to check the cable.
Can low voltage cause CH05?
LG says error codes can appear from unstable power. Reset the breakers, and use a suitable stabiliser if voltage fluctuates in your area.
Sources
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