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Old 05-03-2015, 09:13 PM   #1
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New generator oscillating current

Hi, need help. I'm new to this .
I got a yamaha2400ishc generator 6 months ago.

Problem. The current is oscillating on and off. This means for example, the AC quickly cycles on-off-on-off.
the green pilot light flickers, and when I plug a light into a camper wall socket it violently flickers like a Halloween light. It will do this if I plug a light straight into the generator.

Long story short-- boon docking in RV, running AC, the kids turned on tv. After a while the generator revs hi and the power in the camper cuts out, but gen keeps running
- guess overloaded.

Got home n figured out the camper electrics is NOT the problem as I plugged it into the mains.

When I started it on return it was revving a lot, but now it sounds fine, it's just the unworkable ac that I bought this thing for

It's new- oil, plugs- fresh gas.

What did I do? Please help
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Old 05-03-2015, 09:37 PM   #2
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Does it do it when the auto throttle is off and the engine is running full on?

Not sure this will help as it sounds like the control board for the inverter
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Old 05-03-2015, 09:41 PM   #3
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It's one generator. 2400. It will power up a 13000 AC unit (w start capacitator)

I don't need to pair it, like 2 2000w Hondas.

It will oscillate anything I plug into it starting yesterday. Like a drill, or a light.
I see nothing on the internet or manual about this.

The fan will puff on-off in rapid succession, but just tried the cold air and it seems as if it going to overload.
I would blame the hard start capacitator on the act but the Gen does it even w smallest appliance

I'm stumped -
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Old 05-03-2015, 09:55 PM   #4
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Sounds like to overload sensing circuit is opening and closing very quickly. Find a dealer
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Old 05-04-2015, 09:26 AM   #5
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Is the engine also revving, or is it running smooth and just the output is cycling? If the engine is also revving, don't forget to turn off the choke.

Don't wish to insult your intelligence; just trying to cover all the bases.
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Old 05-04-2015, 09:41 AM   #6
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Sounds like its a generator issue and I would take it and have somebody look at it as it should run a light or a drill and not oscillate on and off take it back and have it looked at before you hurt something in your trailer.
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Old 05-04-2015, 03:45 PM   #7
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It only revs when I plugged the camper in.
It runs smooth w choke in - but AC pilot flickers and small ikea light flickers like Halloween when I plug it straight into the gen.

ALSO
I thought My gfi breaker switch was damaged in the overload, but when I unplugged/plugged back in microwave the reset free'd

It's under warranty, and there's a dealer 10milea away (not like 100 mile away jayco dealer) gonna hit them up
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