MEP-802a, premature overload fault trip.

[Digger556]

So I got another non-runner going again. I bought this one as a parts pile for my main unit, but I got the engine going and thought with some repairs, this unit could be a completed runner. It's been a struggle with missing and broken bits, but today I was able to throw a load on this unit and it was able to pull 6000 watts without issue. However anything above 3500 watts and within a few minutes, the overload fault trips and opens the main contactor.

I'm been through the TM and it just says if the overload module doesn't test as expected, replace it. Okay great, but this one functions, but incorrectly. Does anyone have suggestions of other things I should check or measure before writing off the fault module?

 

[Light in the Dark]

Have you deoxidized all contacts in this set yet? Corrosion can cause faulty overloads.

 

[Guyfang]

This is what you need to start with. Very common problem.

 

[kloppk]

As LITD said, use Deoxit in S6 and S8 and exercise those switches with the set off.

 

[Digger556]

Thanks guys! I did exercise the switches, but didn't Deoxit.