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Old 09-20-2011, 08:47 AM   #1
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1972 23' Safari
NSB , Florida
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Generac and AC issues

The Generac in our '75 Argosy MH is running fine and can power outlets, microwave and the fan side of the AC but I lose power when I turn on the cool side of the AC. It stays off for a short period then the clock on the microwave comes back on. The generator has a new spark plug, air filter and carburetor.

It runs well but maybe a little slow? It doesn't seem to change RPM when put it under a load.

Is there a way to measure the output of the generator? Would a faster RPM make a difference?

thanks
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Old 09-20-2011, 09:29 AM   #2
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Originally Posted by projector View Post
The Generac in our '75 Argosy MH is running fine and can power outlets, microwave and the fan side of the AC but I lose power when I turn on the cool side of the AC. It stays off for a short period then the clock on the microwave comes back on. The generator has a new spark plug, air filter and carburetor.

It runs well but maybe a little slow? It doesn't seem to change RPM when put it under a load.

Is there a way to measure the output of the generator? Would a faster RPM make a difference?

thanks
AC generators must run at a certain speed range in order to have the proper frequency output, which must be 58 to 62 cycles per second.

That in itself, dictates the output voltage.

The slower the speed, the lower the frequency, and, the lower the voltage. The higher the speed, the higher the frequency and the higher the voltage.

BUT, the compressor and fan motor are designed to operate at 60 cycles per second.

Any substancial deviation from that can cause motor failure.

So, the thing to measure, most importantly, is the output frequency.

Andy
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