MEP 803 A tripping CB3

[jaybird67k]

So after all the work I have done to this generator and I have it all buttoned up and ready for use the CB3 keeps tripping. It never did this before through the entire process. It's not a big deal because I reset it and it works fine I just want to know why.

Any help is greatly appreciated.

Thanks, Jason

 

[Jeepadict]

First step of troubleshooting: duplicate the discrepancy. Since you have that done, don't reset that CB more than once for things like to melt and catch fire if you do. There's some fault logic troubleshooting guides in the TM that may prove useful.

Sent from my SM-G970U using Tapatalk

 

[kloppk]

The GFCI in one of my sets is flakey. It doesn't trip, but much of the time after starting I need to "flick" the reset button to get power to the outlet.
Does yours trip and pop out?

 

[jaybird67k]

The GFCI in one of my sets is flakey. It doesn't trip, but much of the time after starting I need to "flick" the reset button to get power to the outlet.
Does yours trip and pop out?

I don't know. I run it and shut it down then next time i go to start its tripped and I reset and starts normally.

 

[kloppk]

I'd suggest disconnecting the GFCIs output to the outlet and see if the tripping stops. If it does the outlet may be bad. If it still trips then I'd say the GFCI is toast.

 

[jaybird67k]

Disconnect outlet still CB1 tripps.
Disconnect gfci at TB5 terminal 4 & 6 still tripps.

 

[jaybird67k]

It wasn't CB3 that was tripping it was CB1 the whole time.

 

[jaybird67k]

So checking out CB1 I have a open connection across V5 varistor.
Any suggestions? Can I put a resistor there if not does someone know the value of V5 so I can order one?

Thanks

 

[Guyfang]

Well, you could look in the Schematic or look the part number up. But Kurt has posted it several times in the forum.

Part #: V68MA3B

 

[jaybird67k]

Well, you could look in the Schematic or look the part number up. But Kurt has posted it several times in the forum.

Part #: V68MA3B

Thanks my friend. The Veristor looks good and is red in color so I guess it just gave up the ghost.
My luck I'll replace it and CB1 will keep popping

 

[jaybird67k]

Well, you could look in the Schematic or look the part number up. But Kurt has posted it several times in the forum.

Part #: V68MA3B

The schematic in the door of the genset or in the TM and which TM is the part #'s listed?

Thanks

 

[Guyfang]

OK. Have you downloaded all the TM's for the set? They are in the link below.

All the TM's needed for the MEP-803A 10 KW Generator Set & Additional Information.

Here are all the TM's needed for the MEP-803A and additional Information.

www.steelsoldiers.com

The -24P TM is the parts TM. Take a look see and if its gibberish to you, we can help you decode it.

 

[jaybird67k]

Yes I have downloaded them. I think I have some duplicates so I attached a picture.
I just never know which one to look at.

Also I just read that a Varistor will check open with no current running through it so I guess I'm back at square one with CB1 popping when I hit start. I have checked all the wires from it for continuity and they checked good accept across the Varistor at the bottom that checked open.

Thanks so much for the help.

 

[jaybird67k]

Or maybe CB1 is just bad?
Can I just tie them four wires together off the two terminals and see if it starts?
Hopefully I can buy CB1 if its bad.

 

[kloppk]

I don't know. I run it and shut it down then next time i go to start its tripped and I reset and starts normally.

Does it trip when you shut it down or does it trip when you attempt to start it?

 

[jaybird67k]

Does it trip when you shut it down or does it trip when you attempt to start it?

It tripps when I hit start position.
It started 3 times this morning no problem and didnt trip but I have had it trip on shutdown.
You think it's weak?

 

[Guyfang]

You wrote:
Or maybe CB1 is just bad?
Can I just tie them four wires together off the two terminals and see if it starts?
Hopefully I can buy CB1 if its bad.

This is a really bad idea. Unless you want to burn something up.

 

[Guyfang]

Could you have someone film you, as you try to start the set?

 

[Guyfang]

It tripps when I hit start position.
It started 3 times this morning no problem and didnt trip but I have had it trip on shutdown.
You think it's weak?

This is the first time you have written this. We need ALL the facts.

 

[jaybird67k]

Thanks for the warning on tying the wires together. When I first got the unit and did the necessary wiring because of a mouse house it was tripped when I went to start it. Reset CB1 and started it probably 20-30 times with no problem. Now it just seems flakey. I started it this morning with no problems then later when I tried fuel pumps come on relay engages but as soon as I hit start the last position it trips CB1.
Yes I can have someone video me starting it.