MEP 802A Not Closing Circuit

[Hunter.423]

The generator is making power it reads 60 Hertz 220 volts but when I try to flip the momentary switch to close the circuit the light quickly flashes green and then goes out? Has anyone had this problem?

 

[Light in the Dark]

Try cycling that switch a few more times (like a dozen more times at least). Does the problem go away? It sounds like your K1 contactor is hanging up (not an uncommon thing).

802a no power at lugs

Noob here. Just bought a 802a from a private seller. Got it home, started testing and found that it runs great, looks well cared for. Convenience outlets are pushing 118v but could not get power at terminal lugs. Close circuit light does not illuminate. Did look at several threads to see if...

steelsoldiers.com

 

[Hunter.423]

Try cycling that switch a few more times (like a dozen more times at least). Does the problem go away? It sounds like your K1 contactor is hanging up (not an uncommon thing).

802a no power at lugs

Noob here. Just bought a 802a from a private seller. Got it home, started testing and found that it runs great, looks well cared for. Convenience outlets are pushing 118v but could not get power at terminal lugs. Close circuit light does not illuminate. Did look at several threads to see if...

steelsoldiers.com

I did try a few times and it did not work, I cant say it was a couple of dozen. Thanks I am going to see about the K1 contactor. Unit has been working fine.

 

[Light in the Dark]

One of the biggest PITA qualities of sets with open contact switches and relays is corrossion. The more times you can cycle something, the more that any small bit of corrosion can be disturbed and the part freed. As part of this exercise of diagnosing the K1, I recommend finding a high quality spray deoxidizer (I use Deoxit D5, there are others on the market) and plan on spraying every single switch, terminal screw, relay contact point, etc. You will have the roof off to test the K1, so its the perfect time to deoxidize all contacts (and with a quality spray, actually inhibit future corrosion issues).

 

[kloppk]

Do you have power at the lugs if you hold the switch UP?
Do you have any fault lights illuminated?

 

[Hunter.423]

Do you have power at the lugs if you hold the switch UP?
Do you have any fault lights illuminated?

No fault lights at all, I have not tried to hold the switch up and check lugs. The switch light immediately goes off so I am assuming power is interrupted. I have it hooked to my camp and it will not energize.

 

[Hunter.423]

Do you have power at the lugs if you hold the switch UP?
Do you have any fault lights illuminated?

If I hold switch in up position I do have power at lugs.. maybe switch it bad?

 

[kloppk]

OK, getting power to lugs indicates the contactor is not stuck and is closing.
The switch usually don't go bad. Likely something else.

Was this generator previously working OK and providing power to the lugs for you?

Does S5 have the Diode installed on it like this in this orientation?

 

[Hunter.423]

OK, getting power to lugs indicates the contactor is not stuck and is closing.
The switch usually don't go bad. Likely something else.

Was this generator previously working OK and providing power to the lugs for you?

Does S5 have the Diode installed on it like this in this orientation?
View attachment 893912

Generator was working, I use it frequently at my hunt camp. Yes there is a diode on the switch.

 

[kloppk]

With the set stopped unplug P6 from under the control cube and then plug it back it.
To unplug P6 you'll need to turn its locking collar to unlock it from J6 and help back it out of J6.
Reverse for plugging back it. Be sure locking collar is all the way locked when done.
The signals to/from the contactor to control it go thru P6/J6. Possibly a poor connection.
Then try the generator again.

 

[DieselAddict]

Wonder if that diode is broken. They sometimes fracture from vibration.

 

[kloppk]

A real possibility.

 

[DieselAddict]

Might be a good idea to test the diode and make sure it still works.

 

[Hunter.423]

Might be a good idea to test the diode and make sure it still works.

Is there a way to jump the switch so I can have power and use generator?

 

[kloppk]

Jumpering terminals 5 & 6 on S5 will cause the contactor to stay closed.
*** Caution *** Doing so bypasses the Overload and Short Circuit protections *** Caution ***

 

[Light in the Dark]

Is there a way to jump the switch so I can have power and use generator?

Have you removed and tested the diode? I would do this well before jumping it.

 

[Guyfang]

After testing the Diode, replace it on the set. start the set up. Flip the S7, (Battle Short switch) up. The light should come on. Then try and close the CB1 with the S5, (AC output circuit breaker switch). Will the CB1 stay closed now?

 

[kloppk]

...Then try and close the K1 with the S5, (AC output circuit breaker switch). Will the K1 stay closed now?

 

[Guyfang]

OK, OK. K1. My whole life it was a CB1.

 

[dwade154]

This forum helped diagnose my 802 unit. I was missing the diode on the interrupter switch and was not getting power at the lugs. Thanks KloppK!

Also the CB1 breaker was tripping as well. That was due to someone wiring the DC alternator wrong.

Here is a YouTube video I made that might help someone diagnose the CB1 breaker.

Fixing the Mep-802a CB1, No fuel and No power at lugs.