GeneratorAC weird problem... stumped
Hey guys long time lurker, still somewhat new to motorhomes, first post, go easy on me. :)
Here's my issue, bear with me, Well first, RV is 2000 Gulfstream SunSport, diesel pusher on Spartan chassis.
Onan diesel 7500 generator. Runs fine, and had it checked and was told it was "100% perfect", he put it on a load bank and ran 50 amps for 10 minutes, worked flawlessly. I wasn't there, but he's a reputable generator repair place as far as I understand. Now, it'll run the water heater fine, I don't know what kind of load those pull, but I'm sure it's not too light.
Here's the problem... when I try to run an AC unit, either one, it runs at first, then you can hear the compressor kick on, then after a short period of time, could be 15 seconds, could be 45, you hear the compressor "kick out" and then the generator revs high for a short period then returns to idle. Repeat this cycle as many times as you like. It will just keep doing this.
Here's the kicker... both units, both separately and together, run fine on shore power, whether it be Georgia Power or my Honda EU6500 quiet generator. All weekend long.
Thinking it could be the switch, I first cleaned the contacts, no help, then swapped the inputs. So the generator was actually feeding in where the shore power would normally be feeding into the switch. No help.
Then I ran a totally separate wire set(stole from my 220 welder extension cord) direct from junction box in front of drivers feet, back through cabin, into input to switch in back. I had 121-123 volts into switch and out of switch. Also had this with coach wiring, forgot to mention that earlier. It does drop a second when compressor kicks on, I figured that was normal and expected.
I also tried the Supco hard start capacitor on one of the units with no help. The units are old, but appear to work fine on shore power, so I've somewhat ruled them out, but not totally.
I'm no electrical guru, especially RV systems, but I'm not your average dummy either. I may have left something out and hope it's something totally simple I'm not aware of with RV's, so give me your thoughts and/or questions and I'll answer them as best I can. Any help is appreciated. I will take it to someone if I have to eventually, but I'm afraid to take it just anywhere and hear the horror stories of people just shotgunning on the customers dime. I can't afford that.
Thank you in advance.
Here's my issue, bear with me, Well first, RV is 2000 Gulfstream SunSport, diesel pusher on Spartan chassis.
Onan diesel 7500 generator. Runs fine, and had it checked and was told it was "100% perfect", he put it on a load bank and ran 50 amps for 10 minutes, worked flawlessly. I wasn't there, but he's a reputable generator repair place as far as I understand. Now, it'll run the water heater fine, I don't know what kind of load those pull, but I'm sure it's not too light.
Here's the problem... when I try to run an AC unit, either one, it runs at first, then you can hear the compressor kick on, then after a short period of time, could be 15 seconds, could be 45, you hear the compressor "kick out" and then the generator revs high for a short period then returns to idle. Repeat this cycle as many times as you like. It will just keep doing this.
Here's the kicker... both units, both separately and together, run fine on shore power, whether it be Georgia Power or my Honda EU6500 quiet generator. All weekend long.
Thinking it could be the switch, I first cleaned the contacts, no help, then swapped the inputs. So the generator was actually feeding in where the shore power would normally be feeding into the switch. No help.
Then I ran a totally separate wire set(stole from my 220 welder extension cord) direct from junction box in front of drivers feet, back through cabin, into input to switch in back. I had 121-123 volts into switch and out of switch. Also had this with coach wiring, forgot to mention that earlier. It does drop a second when compressor kicks on, I figured that was normal and expected.
I also tried the Supco hard start capacitor on one of the units with no help. The units are old, but appear to work fine on shore power, so I've somewhat ruled them out, but not totally.
I'm no electrical guru, especially RV systems, but I'm not your average dummy either. I may have left something out and hope it's something totally simple I'm not aware of with RV's, so give me your thoughts and/or questions and I'll answer them as best I can. Any help is appreciated. I will take it to someone if I have to eventually, but I'm afraid to take it just anywhere and hear the horror stories of people just shotgunning on the customers dime. I can't afford that.
Thank you in advance.
