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Old 08-11-2015, 08:51 PM   #1
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Location: Boise
Posts: 201
Generator Issues

I have an Onan 5500 in my fifth wheel. Everything works fine off my Generator except the Air Conditioning. After a few minutes the 20A breaker pops on the generator, sensing the open leg the surge guard blocks all generator power. It was suggested to me that the AC may be drawing too much power, but I don't know how to test the AC unit.

TV: 2013 F350, Lariat, 4x4, CC, LB, 6.7L Powerstroke
FW: 2013 Jayco Eagle Premier 361 REQS
Additions: Onan 5500W LP Generator, Surge Guard TS,
.......Roof Satellite Dish, Vent Covers, Bedroom Vent Fan,
.......Rear Reciever, 12V DC Outlets (6), 320W Solar & Controller,
.......4 Lifeline AGM Batteries (600 Ah @ 12V),
.......Stereo Upgraded, Interior Speaker Upgrade, Amp
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Old 08-12-2015, 12:57 PM   #2
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It's strange that a 5500 would not run the air 20 amps x 120 volts is only 2400 watts even adding another 2400 watts for starting surge it should handle the air unless you have something else pulling a big load !

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Old 08-12-2015, 05:45 PM   #3
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Your a/c should be running off a circuit larger than a 20 amp, when my trailer is plugged in to only a 20 amp plug shoreline, my a/c will pop the circuit too. If your generator has a 30 amp plug your a/c should be connected to the 30 amp

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Old 08-12-2015, 05:51 PM   #4
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Location: Dickinson
Posts: 436
Your Onan 5500 genset doesn't have (2) 30a breakers? You mentioned a 20a on it.
My Onan 5500 has (2) 30a, so did my old 5500.
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