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MEP 804B
- Thread starter Jackal63
- Start date
- 7,712
- 19,755
- 113
- Location
- Charlotte NC
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Welcome to the Outfit!
There are quite a few really sharp guys here who work on and repair generators. Several of them offer repair parts too. Troubleshooting guides are in the Technical Manuals (TM's) and it might help if you have those free books downloaded to your computer or phone or tablet.
Undervoltage light... Is the machine making power?
I adjusted the hertz to 50 and the volts to 204, so it shows power, but I checked the 120 outlet and have no power.
- 16,716
- 23,970
- 113
- Location
- Burgkunstadt, Germany
I have an under voltage light on and the ac interrupter light and the battle short stay on. (All the time? Or as soon as you place the S1, (start switch) in the run position?) Or do they come on when you let the S1 go, during start up?
I adjusted the hertz to 50, (will the hertz go higher?) and the volts to 204, (Will volts go higher?) so it shows power, but I checked the 120 outlet and have no power. (Have you reset the GFI, AND the J1, (120 volt outlet?) The reset for the J1 is on the inside of the control panel, on the side of the GFI)
Is the S12, (50/60 hertz switch) in the proper position?
Have you ever seen this gen set run correctly?
Have you down loaded the TM?
I adjusted the hertz to 50, (will the hertz go higher?) and the volts to 204, (Will volts go higher?) so it shows power, but I checked the 120 outlet and have no power. (Have you reset the GFI, AND the J1, (120 volt outlet?) The reset for the J1 is on the inside of the control panel, on the side of the GFI)
Is the S12, (50/60 hertz switch) in the proper position?
Have you ever seen this gen set run correctly?
Have you down loaded the TM?
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The hertz will adjust up and down, as well as the voltage. The s12 is in the 50 hertz position. I have tried to reset the GFI. I have down loaded the TM, but have not seen this unit run correctly.
- 16,716
- 23,970
- 113
- Location
- Burgkunstadt, Germany
Why are you running in 50 Hertz? I have not lived in the States for a very long time. Has there been a change from 60 Hertz, to 50 Hertz?
They have not changed the electrical requirements, yet. I had ran it on 60 hertz,but wanted to check out the operations on 50hertz. They both show show that they are working, but still show under voltage.
- 16,716
- 23,970
- 113
- Location
- Burgkunstadt, Germany
Put the set in 60 hertz, and leave it there.
If you have no ACV at the J1, go to TB4-15 and K5-1. Measure there for 120 VAC. What you got?
If you have no ACV at the J1, go to TB4-15 and K5-1. Measure there for 120 VAC. What you got?
Sorry,I have been down for a while, with doctors. I have checked, and there is no power at J-1 or at TB4-15. K5-1 shows 124 volts. And I want to say thank you for your help.
- 16,716
- 23,970
- 113
- Location
- Burgkunstadt, Germany
Measure between TB4-15 and K5-1. You should get 120 volts AC. If you do, then you need to reset the circuit breaker CB3. Or replace it. That's why I posted the schematic above.
Back from holidays, I hope you had a good Christmas. I checked voltage at TB4-15 and K5-1 it shows 128 volts, and CB3 will not reset. I noticed the hertz seems to fluctuates,a little. Maybe the gauge?
- 16,716
- 23,970
- 113
- Location
- Burgkunstadt, Germany
- 16,716
- 23,970
- 113
- Location
- Burgkunstadt, Germany
I would look up the NSN and plug it into Ebay. If no joy there, post a want add in the forum. Someone may have a take out on hand. Is yours with, or without in line fuse.
- 16,716
- 23,970
- 113
- Location
- Burgkunstadt, Germany
Can you post a film of the gauge during start up?
I don't know how to do that, and I went back out and checked, it fluctuates from about 58.5 and 60.1
- 16,716
- 23,970
- 113
- Location
- Burgkunstadt, Germany
How often? How fast?
Use the ATTACH FILES button down on the left side of the dialog box.
Use the ATTACH FILES button down on the left side of the dialog box.
Withou fuse.