Microwave doesn't work on the genny....

Dutch_12078 wrote:
Microwave ovens are quite frequency sensitive since the magnetron used in the US is designed to operate on 60 hertz with only a small variation allowed. The turntable turning, etc, with no heating, is a common problem when folks take a US microwave oven to a foreign country where 50 hertz is the standard. I would say the OP's problem vary strongly suggest the frequency is off a bit too far. I've used a microwave to test for frequency accuracy when tuning up a generator when my freq meter wasn't available. It's not a perfect test, but it's pretty close.

I think you nailed it....Thanks

Bill

Microwave ovens are quite frequency sensitive since the magnetron used in the US is designed to operate on 60 hertz with only a small variation allowed. The turntable turning, etc, with no heating, is a common problem when folks take a US microwave oven to a foreign country where 50 hertz is the standard. I would say the OP's problem vary strongly suggest the frequency is off a bit too far. I've used a microwave to test for frequency accuracy when tuning up a generator when my freq meter wasn't available. It's not a perfect test, but it's pretty close.

I had this happen last year. Checked my EMS and the power frequency was out of spec. I don't remember what the numbers were, but it was still close enough that everything else worked. Generator had to be serviced.

In my last MH, the microwave would not operate on the generator even though the clock, lights on the mw would work fine. What I found was that the gen was putting out too much or not enough voltage (I forget which). Adjusted it, and the MW started working as expected.

Matt_Colie wrote:
Blutoyz,

What are the model and manufacturer of both the microwave and the APU?

In the past, I have run into some incompatibilities. One did defy understanding.

Matt

I believe I have the factory microwave and genset but I will research that if my power checks out....Thanks for the tip

Bill

Blutoyz,

What are the model and manufacturer of both the microwave and the APU?

In the past, I have run into some incompatibilities. One did defy understanding.

Matt

try your roof top A/C. just to check blower speed and IF the compressor will run

like it has been said, voltage and frequency issues

rgatijnet1 wrote:
One thing I recommend for everyone is to buy an inexpensive Kill-A-Watt meter. Kill-A-Watt
Plugging this in to any outlet on your RV, when the generator is running, will tell you if the voltage is correct, the 60 cycle frequency is correct, and what happens to everything when a load is applied. When plugged in to shore power, this same meter will tell you if the shore power is high or low power, etc.
Basically it is an inexpensive piece of equipment that can help with troubleshooting any electrical problem.

I have one of those. It's fabulous, especially for the price.

One thing I recommend for everyone is to buy an inexpensive Kill-A-Watt meter. Kill-A-Watt
Plugging this in to any outlet on your RV, when the generator is running, will tell you if the voltage is correct, the 60 cycle frequency is correct, and what happens to everything when a load is applied. When plugged in to shore power, this same meter will tell you if the shore power is high or low power, etc.
Basically it is an inexpensive piece of equipment that can help with troubleshooting any electrical problem.

All good advice....Thanks

It does run TVs and such but nothing that really puts a load on it. I will do a full maintenance including an output check and update when I do. Now that I know it isn't a "design flaw" I can take the time to diagnose it.