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merc1100sc's avatar
merc1100sc
Explorer
May 18, 2017

A/C Tripping Breaker Question

All,

I have a FR Work and Play with a rooftop AC. Not sure of the model off the top of my head but I don't think it's relevant at this point as I just want to confirm a few things.

Here goes. Last night, being 80 something degrees, I turned on the AC unit for the first time since I purchased this camper used. Kicked on right away and cooled very quickly. I then adjusted the thermostat up to make sure that works and turns the unit off. It did. Then, when I slid the thermostat back down, I could hear something in the unit spinning slowly for a few seconds. I assume the compressor. Then the A/C breaker inside the camper trips. If I reset the breaker, the unit fires back up and runs like normal.

After doing some reading, I think my issue is that the camper, in my driveway, is plugged into a standard receptacle, with an adapter cord, connected to the 50amp cable. I am guessing my issue is not with the a/c unit but with the corded and adapter being the bottle neck and causing the breaker to trip. Does this make sense?

And if so, will the unit run ok using my two Yamaha 2000W genny's paralleled together?

Thanks
  • You also dont cycle it off then right back on. You must give the refrigerant time to equalize or else the compressor is trying to start against higher pressure...coupled with the sub par power supply. Let your unit sit for a few min before attempting to restart
  • I believe you discovered the problem. You do not want to run the A/C from a circuit and cord that are too light for the job. The A/C was probably struggling for power. It was probably overheating and tripped the breaker. DO NOT run the A/C in this manner, it can do permanent damage to it. Your shore power cord plugged into a 30 amp outlet is the minimum supply you want to use.

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