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Have a split unit a/c, outside unit starts, runs for about 5 mins then shuts off, electrician looked at it and said compressor drawing high amps and it's shutting it down due to overheating? could it be air in system or dirty condenser or evaporator?

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It could be. It could also be a problem with the capacitor or a restriction in the refrigerant lines or a low charge due to a leak in the system.

Posted on Apr 28, 2010

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Posted on Jan 02, 2017

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That code means that the compressor is drawing too much current when it is trying to start. It is highly unlikely that the main board is bad.

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Hi i have a roof top LG LS- k1830 HL 18000/19000btu heat & cool mini split air conditioner. my ? is the condenser fan wont run and the after the unit is on for a while the high pressure line does...


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For the past two days I have had to reset the main circuit breaker for the outside unit. It appears to be running fine now. I'm just wondering is this an indication of the compressor about to go bad,...


Bill, first thing, make sure the outdoor coil isn't stopped up with dirt. This will cause the compressor to overheat and possibly trip the breaker. If you you can check the amp draw that would be good. Look on the data tag on the outside unit and look for RLA or "running load amps". Running amp draw should never exceed this number, it should actually normally run 10% under RLA. If its real hot where you are like it is here (109) it will be running close to RLA.
If you coil is stopped up with dirt, etc., turn off the breakers, use you water hose and sprayer and carefully wash out the coil.
If all this fails, and your amp draw is good, change your breakers. Hope this helps , stay cool.. Mark

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My unit was working fine until 3 days ago when the breaker tripped, I reset the breaker and worked fine for a day then tripped again when it tripped both the ac breaker andthe main in the trailer as well...


High amp draw can be caused by a few different things, so first check that incoming voltage to trailer is sufficient. (115 volts) Not unusual for some parks to install more hydro hook-ups on a feed line, and when all are up and running, your incoming voltage could be decreased. If your o.k. that way, then I'd start looking at the compressor circuit of your ac, in particular, the compressor start-up capacitor. The capacitor basically stores electricity and boosts it to higher voltage for compressor and fan start-ups to reduce current draw that will trip the breaker. Please have a knowledgeable electrician, or RV tech check this for you, as a capacitor can give a real good high voltage (possible fatal) shock, even when power is off to unit. I also suspect that the start relay has shorted (welded) itself due to high amp draw situation, and that is reason it comes on by itself.

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If the out door fan keeps running and the compressor cycles off that would be the overload in the compressor.
What keeps the windings cool is the refrigerant back to the compressor.
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You are going to have to install a disconnect box next to the unit, with the proper sized fused disconnect inside, and have a new breaker installed at the panel, when the unit comes on, its the compressor that takes the most energy to run, the compressor at start up draws alot of amps, You will need to talk to an Electrician to do your breaker and disconnect work,

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