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Old 06-09-2010, 10:36 AM   #1
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HELP on electrical problem

Here’s the issue:

Both A/Cs work when on shore power. When using generator, rear A/C works BUT not front A/C.

Refrigerator works when on shore power or when on LP setting sitting still with no gen power. However, when on highway and generator is running, refrigerator temp climbs to 48-50 degrees. Lost food twice on last trip.

All electrical outlets work when on shore power. However, when on gen power, only bedroom outlets work; all front outlets are dead.

I tripped and reset GFI and still no power on front outlets.

I checked breakers and fuses under washer/dryer cabinet and all was OK.

Am I possibly missing another fuse box somewhere? Is it possibly a 12 volt issue?

Please, any suggestions will be appreciated.
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Old 06-09-2010, 10:56 AM   #2
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Without knowing what trailer, or what generator, built in or add on, adapters, ect., I can only guess that your generator is not putting out 240 volts. Having 2 Air units, that would mean 50 Amp service, this requiring 240 volts AC out of the generator. Sounds like one leg is dead, or in other words, generator is putting out half voltage.

Run the generator and test each leg for 120 volts to ground, then test for 240 bolts across both legs.

Good Luck
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Old 06-09-2010, 11:49 AM   #3
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Unit is a Georgetown MH 378TS
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Old 06-09-2010, 12:14 PM   #4
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Check the breakers on the generator. Sounds like one is tripped.
Check diagram in owner's manual for exact location of breakers. In my case the breakers are located on the front panel to the left.
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Old 06-09-2010, 12:27 PM   #5
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A few questions for you.
Did everything work properly on generator power alone when you bought the coach or is this a new problem?
Do you have power to your coach 12 volt interior lighting system and water pump when on generator power alone? How about when going to down the road without the generator running?
Are you trying to run your refrigerator on electricity, gas or automatic selection when the generator is running?
Do you have a unit similar to this in your coach? Lifestyles If so, how many watts is your generator rated for and does it it actually put out that many watts under full load?
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Old 06-10-2010, 06:33 PM   #6
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Thanks for the input. One of the breakers on the generator had tripped.
You all are a great resource and help on this site.
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