Lost partial power - 2015 Momentum 350m

[TXkmpr]

Hey Tim and Connie, sounds like an issue with the pedestal. Have the park check it out for you.

If you have a multimeter it is easy to check.

https://www.rvtravel.com/rv-electric...amp-measuring/

[Jerryr]

Or it could be a bad surge protector where it plugs into the pedestal. Try plugging into the pedestal without the surge protector.

[WhittleBurner]

We just had our 2nd progressive malfunction. Reads normal and no power.

It could be the EMS. Have you tried plugging directly to the pedastal without the EMS to see if both legs works?

[el Rojo]

Use a volt meter to test the pedestal. I have however seen the voltage good with no load and then bad under load. This is usually a loose connection.

[xrated]

We lost power to the main AC, part of the living room outlets, and microwave. The bedroom AC and outlets, and the fridge are still working.

The surge protector/voltage monitor at the pedestal shows normal voltage and a draw of 5 amps on one leg and 0 amps on the second leg. Blue light on power cord is illuminated where it plugs into trailer. No breakers are tripped. All fuses appear to be OK, at least no red lights next to any. When I fire up the generator, everything works.

Suggestions?

The statement of the highlighted sentence above, automatically eliminates about 1/2 of the electrical stuff to check. With it working just fine using the generator, you can safely eliminate the 120V breaker panel and the associated wiring from the panel to the transfer switch. So what is left is.....the transfer switch itself, the wiring between the transfer switch and the shore power plug on the side of the trailer, the plug itself, the power cord from the trailer to the shore power connection, the surge protector, and the shore power itself.

In order to cut those possibilities in half, start at the end of the shore power cord....the end that plugs into the trailer and see if you have all the correct voltages there.
Hot 1 to neutral = 120VAC
Hot 2 to neutral = 120VAC
Hot 1 to Hot 2 = 240VAC
Hot 1 to ground = 120VAC
Hot 2 to ground = 120VAC

If all the proper voltages are at the end of that cord, the problem is either the RV plug on the side of the trailer, or the wiring from there to the transfer switch, or the transfer switch itself.......continue narrowing it down.

If there ISN'T the proper voltages at the end of the shore power cord from the shore power box, then the issue is...the shore power cord itself, the surge protector, or the shore power receptacle in the shore power box....or possibly the actual power coming into that receptacle.....continue narrowing it down. Hope this helps

[Hoopy Frood]

If you're using an extra connector for your shore power cord, i.e. a 90º dogbone or the like, remove it and recheck your connection. I sounds like the power cord is wonky, or the connection at the trailer itself.

[WhittleBurner]

2 identical Threads merged into one, please only post one thread per issue. Crossposting only confuses things and is not allowed.

[Tim & Connie]

Or it could be a bad surge protector where it plugs into the pedestal. Try plugging into the pedestal without the surge protector.

Thanks, will be doing power checks today, happened late last night, so we just went to bed. I made the assumption the pedistal power was ok as the surge protector digital readout showed proper voltage, but easy to check.

[Tim & Connie]

Thank you for suggesting a number of possibilities. Going to start tracking it down this morning. On the transfer switch, we were on shore power for several hours when this happened, would the transfer switch just fail or would it typically fail when switching between generator and shore power? And chance this could be a converter issue?

[Redapple63]

Since it runs fine on the Jenny, in my opinion that moves the focus to the pedestal.

Bill