MEP 831 FAQ for owners or potential buyers

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I have a friend who has a 831, he has power at the convenient receptacles but none on the main power lugs ( in any configuration), we did find one burnt relay behind the control panel, replaced it no glory... anybody run into this or have any ideas??
 
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DieselAddict

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You'll want to grab the Technical Manual from the manual section of the forum and do a bit of quick reading to get up to speed on how these things work.

If you have power at the receptacle but not the lugs (assuming you flipped the switch) you need to troubleshoot the circuit that energizes the power contactor and troubleshoot the contactor itself.

There are several troubleshooting guides that will help immensely.

https://www.steelsoldiers.com/showthread.php?155865-Manuals-for-the-MEP-831A
 

Guyfang

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I have a friend who has a 831, he has power at the convenient receptacles but none on the main power lugs ( in any configuration), we did find one burnt relay behind the control panel, replaced it no glory... anybody run into this or have any ideas??
Have you downloaded the TM?
Have you ever seen this gen set work right? Is it new to you?
What relay did you find burnt.
Are you sure that you replaced it with the right relay? K12, K14 and K15 are not all the same relay.
Do you know how to use a multimeter?
Can you read a schematic?
 

Guyfang

Well-known member
8,988
3,316
113
Location
Burgkunstadt, Germany
Have you downloaded the TM?
Have you ever seen this gen set work right? Is it new to you?
What relay did you find burnt.
Are you sure that you replaced it with the right relay? K12, K14 and K15 are not all the same relay.
Do you know how to use a multimeter?
Can you read a schematic?
You really need to start your own thread on this problem.
 

Mogman

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What a piece of JUNK!! even after you get all the controller issues fixed all you end up with is a generator you cannot run inside (as with all generators) and despite the fact it has a solar panel to charge the batteries you cannot leave it outside because the slightest amount of moisture and the thing will shut down on "overload/short circuit" (I have read MANY accounts of this, not just me) what a POS......
 

CallMeColt

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What a piece of JUNK!! even after you get all the controller issues fixed all you end up with is a generator you cannot run inside (as with all generators) and despite the fact it has a solar panel to charge the batteries you cannot leave it outside because the slightest amount of moisture and the thing will shut down on "overload/short circuit" (I have read MANY accounts of this, not just me) what a POS......
I had let mine run in the rain overnight & didn't have that issue. Also had a return fuel line blow & it ran all night coated in diesel another time. Sounds like there is an actual short that is showing itself when it gets wet. Maybe a common area that shorts?
 

Mogman

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I had let mine run in the rain overnight & didn't have that issue. Also had a return fuel line blow & it ran all night coated in diesel another time. Sounds like there is an actual short that is showing itself when it gets wet. Maybe a common area that shorts?
After doing some searches it appears the inverter does not like moisture, I now have three of these and if it rains one will have issues, if it rains hard enough two will have issues, I assume they stay warm enough while running moisture is not a problem, all of them will work if run for a while and warmed up then restarted, if I ever get the time I will tear the worst one down and coat the insides of the inverter with dope and see if that helps.
 

CallMeColt

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Location
Wilson County, Texas
After doing some searches it appears the inverter does not like moisture, I now have three of these and if it rains one will have issues, if it rains hard enough two will have issues, I assume they stay warm enough while running moisture is not a problem, all of them will work if run for a while and warmed up then restarted, if I ever get the time I will tear the worst one down and coat the insides of the inverter with dope and see if that helps.
That makes sense since mine was running that the heat kept it from building up moisture.
 
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