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Only fans work on split system model ls-k2463hl earth breaker trips when compresor tries to start I own a Panasonic Heat pump model A18CKP6G with the same problem. The compressor was replaced last June and the breaker has been tripping eversince when it's raining or when it's humid outside. My repairman can't figure out the problem and my electrician confirmed it's not the breaker!

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  • Ninjazx12r_r Feb 04, 2009

    Unfortunately, I can't access the outdoor unit; my condo is on the third floor and I don't have a ladder... I have to rely on the repairmen expertise... The company sent 2 different guys so far and neither one of them found anything wrong with the heat pump. The unit worked perfectly for 3 years and the problem started when the compressor was replaced last June... The breaker is a GFI

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Sounds like a wiring problem between the outdoor unit and the house. You would be surprised what I have come across in 30+ years of A/C work.
But it could also be the compressor.

I will need to know answers to the following -

Does the compressor have a soft start (2 wire capacitor looking device that attaches to the run capacitor), hard start (relay and capacitor), or just the run capacitor?

Were the run capacitors and start components replaced when the compressor was replaced?

Is the breaker a GFI breaker, or just a standard breaker?

Rain or humidity is not usually a factor, but it may be something.

Reply back what you find.

Posted on Feb 01, 2009

  • Mark Egan Feb 04, 2009

    Well,

    Being on GFI is an issue. I am not aware of any code that requires the outdoor unit to be on GFI, although local codes may require it.

    So, if it has to be on GFI, then the techs that are coming out need to understand how a GFI works. Otherwise, they won't know what to look for. Wiring terminations is much more critical, to the point that all wire nut like connections need to be taped and waterproofed.
    All electrical panels need to be properly in place and screws tight, using the correct screws.
    All conduit based wiring needs to be properly routed through bushings and fittings, with no bare wire exposed to any chassis ground.

    Too bad you can't get up there to see for yourself. Sometimes tech's can't see the forest for the trees, and their desire to repair isn't as great as yours. They can go to a nice warm home everynight.

    Let me know what you find.



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