Quote:
Originally Posted by MickLittle
Sounds like you are having voltage drop at the contactors in the transfer switch. I'm sure it would work fine with just the generator, but you are putting a load on the circuit causing voltage drop on the circuit and transfer switch. (Same power operating the transfer switch) One way to check is to put a volt meter on the circuit during "start-up" of the A/C. This will tell you how much voltage drop there is. Low voltage will cause contactors to chatter!
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Yep, that or there's enough of a surge with the AC to cause the contacts to chatter because the generator cant handle it well. I have the same issue with the contactors in my hardwired Progressive Ind EMS and my Yamaha. Doesn't happen with a Honda but the V1 Yamaha does not have enough surge capacity when running through the EMS.