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Old 02-22-2015, 03:35 PM   #1
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A/C's & Heat pumps

Please bear with me--

Two combination A/C's & H.P's (Colman's)

I ran the generator (Onan-7000 watt) about a month ago and the front H.P kicks one, of the two, 30 amp circuit breakers off. I thought it might be a bad breaker. I replaced the breaker with a brand new one.

I ran the generator again today- I could run both heat and a/c to check things out- 75 degrees (of course, not at the time). The front A/C is fine. The H.P. (same front unit) kicks that same circuit breaker (on the generator) out again. No other loads on the ac circuit (electric water heater, microwave, etc, all off). The rear unit works fine- both modes.

My question is- Doesn't the H.P. and A/C use the same amount of power?

On shore power no problems at all.

The last time I exercised the generator, about 3 monts ago, I did it in the same manner and no problems.

Low freon?----- another issue?

Thanks for listening--

Max
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Old 02-22-2015, 04:02 PM   #2
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Yes they do. A heat pump both heats and cools - it is not two separate appliances.

What may be happening is that the reversing valve that shifts it from cooling to heating is stuck and causes an overload when trying to change modes.
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Old 02-22-2015, 04:43 PM   #3
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Quote:
Originally Posted by Gary RVRoamer View Post
Yes they do. A heat pump both heats and cools - it is not two separate appliances.

What may be happening is that the reversing valve that shifts it from cooling to heating is stuck and causes an overload when trying to change modes.
I have had WAY too much experience with this issue in the last year. LOL 4 replacement of the same Dometic unit. SIGH!

I am not specifically aware of the configuration for Colman brand but it is possible that the reverser valve could do this. I've seen that.
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