Jsampo85
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Ohhhh ok i gotcha, i had read somewhere that you were supposed to read voltage across those 2 pins. Safe travels while you are on the road!
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Did you ever figure out your issue?Sorry for the hijack but I am having a similar issue. When I start the generator I am only getting 6v from each leg, and 12v across two lugs. The voltage gauge on the panel reads the same low voltage. Turning the voltage adjust knob doesn't make a difference. This is with the ac connector open or closed. Also the hz is very low. The freq gauge hovers around the lowest reading. The engine rpm does change slightly when the hz knob is adjusted.
unlike buttonUnfortunately I never found out what was wrong. Guyfang was a huge help but in the end I didn't have the time to dig deeper and I sold the unit. The guy who bought it reworks them for the concrete cutting industry and his diagnosis was the gen head was bad.
i got power to one side of the AC contactor but not the back side. I got about 210 volts Ac on the front side and not much of anything on the back side.. Ive been having **** finding the correct trouble shoot in the manual..What "Breaker" are you talking about? Do you mean the Ground fault interrupter, (GFI). TM 9-61115-643-24P, Figure 7, item 22. Is that what you are talking about?. On the side of the GFI, there is a small switch or reset when the GFI gets tripped. The GFI only trips when you have a ground fault problem. Or do you mean CB-1 breaker? Behind the control panel door.
To find the A.C. contactor,take a look at Figure 16, (output box assembly, in the TM. It shows you the contactor as item 36. There is a cover on both sides of the contactor, to prevent anything from making contact between the AC output cables. Like your hand, or a wrench. Two screws hold the cover on. Remove both covers. Start the set. Measure between all three cables on one side. Between any two cables you should get about 220 volts, as you are measuring between two phases. Any voltage? If not, Measure between the cables on the other side. Any voltage? If not, perform the same test while someone like your best friend, holds the start switch up while you do the test. Remember, this thing produces electricity! So be careful. Do not drop anything metal into the works. Might light up your life!! If you have voltage on one side and not the other, the contactor is not working. May not be bad, something maybe not letting it close. Like a relay. If you have no voltage on both sides, then the Main Generator is not being excited, or not "lighting off" when it gets excition. But lets first start by testing the main AC contactor. AND FIRST, like MtnSnow wrote above, GET THE TM's!!!!!!!!!!!!!! The troubleshooting diagram in the back of the book is not bad. Are you getting any idiot lights, (Fault indicator lights) coming on at any time? We need more info.
I disconnected 16 and 17 got 3.8. Now i need to know what that magnetic pick up looks like so i can adjust it.. do you have a pic? when i google it tons of stuff comes up but nothing that looks like what youre describing and when i search it in the manual i turn up nothing?The voltage produced and measured from the Mag Pickup should NOT exced 3 volts. Adjust the mag pick up as described above. If for some reason you can not adjust it down to 2.5-3.0 volts, the pickup is bad.
I assume by 3A limitron fast acting KTK-3 bus fuse, you mean the Quad circuit fuse, to protect the excitor windings. If your Volt regulator is defective, and sends to much voltage to the exciter windings, they burn up. Hence the fuse. You can measure how much voltage is going to the windings, by removing the fuse and measure from ground to the input side of the fuse holder.
Back up. One problem at a time.I may be having similar issue with MEP 804a
Mine produces power sometimes while testing but now ready to hook to load and its not. Sometimes getting power at start up sometimes not so thought maybe it was the circuit interrupter/contactor. Checked the magnetic pickup and put it back in but haven't done voltage testing. I didn't see the previous post with the detailed instructions til now. Engine will not start now. Help? Guyfang?
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