Please tell me this isn't going to cost me my first born. I've got an Oman 7500 quiet diesel generator the other night the output dropped to 2-4 volts or whatever it is from 14 I believe it normally does. The generator itself seems fine, well it sounds fine, apparently something isn't fine. I honestly don't even think it's generator I'm thinking it's the inverter. My batteries aren't charging either.I'm not by any stretch of the word a mechanic, however I'm pretty good at following directions. If anyone has any suggestions I'd be eternally greatful. If not I'm going to have to find me a mobile tech around here everyone that services these things are telling me there's like a 4-6 week wait just to get me in to see what the problem is. Thank you,Cody & JodiThe Cooper's

Do the 110 volt outlets work when the genny is running?If so it is not the generator.Probably your inverter/chargerDo you know where it is located?Model?what you can do first is check the wires for loose ones.

Actually, here is what I would do:Turn on a roof A/C. Turn on the other roof A/C. If both work, you know that both legs of the generator output are working. Checking just an outlet gets into "is the inverter powering it or is the generator".If answer to above is no, turn OFF and back ON, both on-generator breakers.If answer to above is yes, turn off and back on the breaker in your main 120 VAC breaker box for the inverter/charger. If no joy, check voltage at the inverter charger (or if you are not safe working around 120 VAC, have someone qualified do it).

I checked all the wires I could see on both the genny and the inverter nothing seemed loose, cracked, broke or unplugged. Oh and yes the plugs work fine when the genny's running as long as you only have one little thing plugged in

Just once, I would like to read someone has the same things as we do, and have had it 50 years, change the oil and filter regularily and it runs better today than when new. :)I guess we can blame the China syndrome. Buy something and guess if it will still work when you get it home or for how long when you do, and always buy two to start out.

What does "Oh and yes the plugs work fine when the genny's running as long as you only have one little thing plugged in" mean

Oman 7500 Diesel Generator Issues | Good Sam Community

14 Replies

down_home
Explorer II
Sep 09, 2017
Just once, I would like to read someone has the same things as we do, and have had it 50 years, change the oil and filter regularily and it runs better today than when new. :)
I guess we can blame the China syndrome. Buy something and guess if it will still work when you get it home or for how long when you do, and always buy two to start out.
The_Coopers
Explorer
Sep 09, 2017
I checked all the wires I could see on both the genny and the inverter nothing seemed loose, cracked, broke or unplugged. Oh and yes the plugs work fine when the genny's running as long as you only have one little thing plugged in
wolfe10
Explorer
Sep 09, 2017
Actually, here is what I would do:

Turn on a roof A/C. Turn on the other roof A/C. If both work, you know that both legs of the generator output are working. Checking just an outlet gets into "is the inverter powering it or is the generator".

If answer to above is no, turn OFF and back ON, both on-generator breakers.

If answer to above is yes, turn off and back on the breaker in your main 120 VAC breaker box for the inverter/charger. If no joy, check voltage at the inverter charger (or if you are not safe working around 120 VAC, have someone qualified do it).
darsben1
Explorer
Sep 09, 2017
Do the 110 volt outlets work when the genny is running?
If so it is not the generator.
Probably your inverter/charger
Do you know where it is located?
Model?
what you can do first is check the wires for loose ones.

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Oman 7500 Diesel Generator Issues

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