LG LMU360CE CH33 mystery

[bonjovi]

LG (aka Load of Garbage) throws error code CH33 high head temp which usually means low on *****. Added some r410a till air temp dropped to mid 50s. Worked for 12 hours then threw CH33 again. Pressures look good. Drawing about 25 amps at the breaker box. Ideas?

[The Viking]

Clean Condenser?
Non condensables in the system?
Faulty Discharge temp sensor?

:cool:

[install monkey]

living on a prayer, unless u degas it and weigh in the correct charge

[Tayters]

living on a prayer, unless u degas it and weigh in the correct charge

Wise words. Reminds me of the chemisty GCSE question, what's the softest know metal to man?







Yep, Bon Jovi.:p

Anyway, 25A, is that a bit high? Service manual here: http://www.coastalwinair.com/lg%20manuals/LMU360CE.pdf 5.9-16.6A in specs.
Probes can be problematic but you might want to check the basics first.

Cheers,
Andy.

[Keza]

I had That fault once on an LG 9kw split a/c
Turned out to be a $18 faulty Discharge pipe sensor