A/C breaker trips

[Chuck Wheeler]

John,

Maybe I missed something, but which BB do you have? If it has the older Duo-therm units they pull more current, but at least one should be able to run on a 7kw generator. I have run our whole coach on a 7.5kw generator when I was working on the Perkins/Kohlar generator. I would start with the start and run capacitors. If you have a clamp on ammeter check the running load. If it is more than what is stated on the name plate there is a problem. Also check the output of the generator under load. If the voltage drops excessively the current will go up. Our front unit kept tripping breakers and I finally replaced it.

When we got our FC31 one of the AC switches by the driver was bad and would not let the front unit run.

Where are you located?

- Chuck Wheeler-

FC 31SB Fort Worth TX

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From: WanderlodgeForum@yahoogroups.com [mailto:WanderlodgeForum@yahoogroups.com] On Behalf Of John Churchill
Sent: Sunday, June 29, 2008 2:16 PM
To: WanderlodgeForum@yahoogroups.com
Subject: [WanderlodgeForum] A/C breaker trips

Well, I just got my generator started for the first time ever. Onan
7kW with a 20 amp and 30 amp breaker. When I turn on the forward A/C,
it runs for a while (a couple of minutes), then trips the 20 amp
breaker, even with everything else switched off. When the AC is off,
the breaker does not trip. I have only used shorepower on a 15 amp
circuit (with a long skinny cord to boot) and it trips that too,
although I am not sure that is a good test. The owner's manual says
that unit ought to draw 14 amps. I understand there is a much bigger
transient load as it cycles, but shouldn't it be able to handle that?
The rear A/C unit does not seem to run, so nothing to report there.
Any ideas of what to do or check? Thanks.