AC trips breaker

[GZMandalay]

Front AC unit (15K btu Dometic)trips breaker after continuous use while running on generator power (8kw Oman). Breaker is combo 30/20 inverter/AC. Does not trip breaker on shore power. Rear AC unit (same) does not have same issue. Anybody have an idea what might be causing this problem. Also AC unit is new but had same issue with old unit.

[Petro]

I am not an electrician but I have solved several problems like yours over the past years. I would check for any loose connections starting with your ATS (automatic transfer switch) thru to your breaker panel. Loose connections drop voltage and cause excessive heat which will cause a breaker to trip. I recently read in a thread in this site where several of our members have found loose connections in their ATS. They believe vibration causes the loose connections if the connections were not torqued properly at installation.

Another thing you can do yourself is check the output voltage of the breaker when the generator and A/C are running only if you believe you can do so safely. You should see about 120V or a little less.

Good luck with you problem.

Don

[twinboat]

Confirm the the generator is running at the proper voltage. A bit lower voltage then shore power could elevate the amp draw.

You may also want to clean the coils on the roof with a garden hose. It made a few amp difference on mine.

[MSHappyCampers]

Hi ! Welcome to IRV2! We're sure glad you joined the gang!

I too would check the output voltage of the genny.

Good luck, happy trails, and God bless!