Generator fried microwave after gen shut down several times
I have a 2014 coachmen Leprechaun Class C with a 4000 Onan, in fact I have 3 because I own a small RV Rental business. A customer returned one yesterday and told me that they tried to use the microwave and the gen shut off (no breakers kicked, the gen physically shut off). I tried this morning, and the micro shut the gen off in the first 5 seconds. I then ran the A/C and everything else for a bit, and tried to run the micro again and it ran for a bit, then shut the gen off again. I tried again, it worked for a minute. The microwave etc worked fine on shore power.
I then took the exact same micro out of another of the exact same RV's, and put the micro from the RV that was shutting down the gen into another RV, exactly the same. I basically swapped microwaves between RV's, which the RV's and microwaves are exactly the same. The RV that was good to go ran fine with the Microwave out of the RV that had the gen shutting down, but the RV that had the Gen shutting down fried the microwave from the good RV. So it's definitely not the microwave. The Onan code that I pulled from the troubleshooting guide and the indicator light was 12, which says to contact authorized onan dealer…Any advice or recommendations on what I can troubleshoot? perhaps the outlet that the microwave is plugged into? I'm not sure what to check here, my guess is that there is too much amps or volts getting pushed through the outlet to fry the microwave, but why on earth would is the generator shutting off? there is a 20 amp breaker on going from the fuse box to the microwave, and a 30 amp breaker on the generator and Main breaker inside the RV. What would cause an appliance to shut the generator down vice kicking the breaker?
I then took the exact same micro out of another of the exact same RV's, and put the micro from the RV that was shutting down the gen into another RV, exactly the same. I basically swapped microwaves between RV's, which the RV's and microwaves are exactly the same. The RV that was good to go ran fine with the Microwave out of the RV that had the gen shutting down, but the RV that had the Gen shutting down fried the microwave from the good RV. So it's definitely not the microwave. The Onan code that I pulled from the troubleshooting guide and the indicator light was 12, which says to contact authorized onan dealer…Any advice or recommendations on what I can troubleshoot? perhaps the outlet that the microwave is plugged into? I'm not sure what to check here, my guess is that there is too much amps or volts getting pushed through the outlet to fry the microwave, but why on earth would is the generator shutting off? there is a 20 amp breaker on going from the fuse box to the microwave, and a 30 amp breaker on the generator and Main breaker inside the RV. What would cause an appliance to shut the generator down vice kicking the breaker?
