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Old 08-21-2014, 04:19 PM   #1
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Generator Tests

I have a Champion 3500-4000 Watt Generator, I have used it to run the A/C old Trailer with no problems. We bought a New Keystone and went dry camping, started the Generator ran great, till we turned on ether the A/C or Micro Wave. It just stops running, ran it on every thing else in the Trailer and it works fine. Could this be Low AMPS, and how do you test for Amps? I have meters to test with, just need to know how.
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Old 08-21-2014, 04:51 PM   #2
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You could rig up something like this with the proper cord ends of course.

Edit: Don't forget the draw from the converter/charger to replenish the batteries. Maybe have the generator running for at least 15 - 30 minutes before you start the AC and have it's fan running before you turn on the unit to lighten the load.
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Old 08-21-2014, 06:20 PM   #3
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Quote:
Originally Posted by kekker View Post
I have a Champion 3500-4000 Watt Generator, I have used it to run the A/C old Trailer with no problems. We bought a New Keystone and went dry camping, started the Generator ran great, till we turned on ether the A/C or Micro Wave. It just stops running, ran it on every thing else in the Trailer and it works fine. Could this be Low AMPS, and how do you test for Amps? I have meters to test with, just need to know how.

Does the AC run okay on shore power?
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Old 08-21-2014, 08:53 PM   #4
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Did you have your electric water heater turned on.
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Old 08-22-2014, 04:18 PM   #5
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Not unusual for these cheap gensets to be able to barely
pull a resistive load, but can not do very much on an inductive load, (motor load).
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Old 08-23-2014, 09:55 AM   #6
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Well, watts are watts, and 3500 should be enough to run one a/c or microwave. Both of those devices have fairly high initial surge, though, and it sounds as though the genset is seeing them as an excess load and shutting down.

Is this the Champion that has the TT30 30A outlet for an RV shore power cord? If not, you can't actually get 30A from the 120v socket (it's a 20A outlet). 20A would limit you to 2400 watts and that's likely to trip with the start load on an inductive device like an a/c or micro.
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Old 09-01-2014, 06:01 PM   #7
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Thanks to all, it wound up been a Bad Non Adjustable CARB.
put on a new one and its working great.
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Old 09-02-2014, 10:32 AM   #8
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Standard generator test panel is a wall of light blubs 100 or 200 or larger,, With switches, ammeter (Clamp on or inline if you can an inline big enough) and volt and frequency meter (Kill-a-watt can handle those)

Start turning on lights and watch the readings... When the voltage or frequency starts dropping, turn off the last light or enough 100 watters to bring it back up to spec and read the amps.

NOTE you can use an electric space heater to "Jump start" that panel if you like, they pull around 12 amps (make sure all load runs through the meter.

Page 2: NOTE that if your RV is 50 amps so you set the generator in the 240 volt position so as to get two legs out of phase like its supposed to be........ You only get half the power to each leg.
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