2021 Solitude 2 of 3 Air Conditioners Not Working

[Iamsparta]

I had some low voltage warnings on my Surge Guard from my Generator, then everything stopped working on shore power. I checked my house 15amp direct and was also getting low voltage. I removed the Surge Guard and everything came back except the front 2 air Mach 3 conditioners.

I get no fan and no compressor, I do get a click from the AC unit controller but that's it. I tried pulling all the connectors from the controller to reseat them but still nothing. I suspect now I don't have 120v to the AC unit, where is the source of the AC 120v supply? Is it direct from the distribution panel? Why is one unit still running and why are there only 2 breakers in the distribution panel (Is the rear one on a separate panel that I don't know about?)

Questions/Questions...

Don

 

[Hoopy Frood]

Just curious why you removed the Surge Guard. Sounds like it was working like it should.

 

[Iamsparta]

Because the house gave the same low voltage error and I know it's 120v

Also, the breakers in the panel have not tripped. I with check power to them tomorrow.

 

[Jomani]

It sounds like one of the two legs of the 50a service is dead. One a three air conditioner rig, one leg will feed two air conditioners while the other leg feeds one. If you are comfortable working around AC power, you can pull the face off the panel and test the voltage coming out of each of the 50 amp circuit breakers.

The air conditioners each have their own circuit breaker in the panel. The click you are hearing is the control (thermostat) that operates off 12v.

 

[Iamsparta]

It sounds like one of the two legs of the 50a service is dead. One a three air conditioner rig, one leg will feed two air conditioners while the other leg feeds one. If you are comfortable working around AC power, you can pull the face off the panel and test the voltage coming out of each of the 50 amp circuit breakers.

The air conditioners each have their own circuit breaker in the panel. The click you are hearing is the control (thermostat) that operates off 12v.

To anybody that reads this thread [MENTION=49453]Jomani[/MENTION] is someone who is very smart, because that is exactly what happened. On a 50amp rig, using a 30 to 50 amp dogbone from a 30amp generator should produce 120v to L1 AND L2 to the distribution panel (there are 2 MAIN breakers in the trailer (unlabeled but one is L1 the other is L2). I found 120v on L1 (black) and 0v on L2 (Red) at the distribution panel... not good. I went to the transfer switch and checked... again, 120v on black L1 and 0v on red L2(OK, now I know it's not a transfer box issue or internal trailer power issue). Turns out that one of my twist caps from after bypassing the Surge Guard was not good (Sh!t, my bad).

I learned a lot going through this but acknowledge twist cap connectors are a terrible long or short term solution (especially with 6 gauge wire). I'm looking for a terminal block to properly bypass my hardwired Surge Guard (because I still think it failed) and I'm camping this weekend so needed a quick solution. I'm going to reconnect the Surge Guard on my last day of camping to see if it shows the same low voltage error which may confirm it has failed.

Thanks for the responses I really appreciate the support.
Cheers,
Don