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Swapped out the voltage regulator fixed the issue. Tightened every wire as well. Its back up and running.

I'll get someone to measure at the CIMs, but.... We've had them balanced and we have not added anything that would change this dramatically. Plus the other machines run fine - as well as rentals we've used recently. So, I don't think it's unbalanced. But I'll check. I did change out the...

During the summer, with everything on, we exceed 30kw. So, we occasionally need two. This being the case, the third one is our spare/backup.

I'm powering my shop which draws between 18kw and 30kw. I have three generators. One is running fine. This one is the only that has the low voltage error. The three are in parallel and connected with the army cables. We have looked at the power draw and they were similar last we checked...

Not sure what you mean. It's 30kw and when I get the undervoltage error, the generator runs, but does not produce electricity. Like someone opened the circuit.

I have mechanical experience, but limited electrical.

Three phase load. A is 208, B is 105, C is 105. It varies. Sometimes B and C are 195ish. And sometimes when I start it, they are all 208. It's random.

Load on each phase varies. This morning phase 1 was 216, 2 = 110, 3 = 108. Typically, phase 1 is 216, 2&3 are 195. I get a low voltage error and it runs but produces no electricity. It's 4pm now. I fired it up and all three phases are 208.

On a whim, I fired it up. Now it healed itself. It must be a short in something. Suns out and warmed it up. Any ideas?

No. Where/how do I do that?

My other generators register 216 on all three legs.

B & C are both well below A. We need all three phases operational if that's what you are asking. It shuts itself down if phases B&C are too low, like below 200.

Started using exact procedure on display cover. Held to start for 5 seconds. All legs registered, but two legs were at 200 and the one was 215. Held down start and reset switches, but no changed. Closed the circuit in parallel with another working generator. It shared the load, but didn't...

Only one leg is registering now.

MEP-805B ?