Hello forum Members,
2nd post here and looking for some help. Just finished storing my snow blowers and pulled out my Toro Lawnmower - got it all cleaned up and true to form, started on the first pull.
I picked up a Coleman Generator 5000 running (6250) peak. A friend gave it to me because he was getting a new one. I got it knowing it starts up but does run plugged in items. I did some continuity tests on the stator and all wires and connectors were fine. I did have solder a wire back on the rotor that was broken off. With all that said - I still cannot get the generator to produce electrical power. I am including a couple of photos of what I perceive to be a problem on the AVR board but am not sure what the part is called and whether it can be fixed or is even the problem.
So quick question - if the avr board is the problem, can that effect the production of electricity on the generator?
Please look at the 2 photos and if you can let me know if that is my problem. I'm trying to learn more about diodes and capacitators, so this is kind of new to me.
Turns out that number comes back to an MOV (Metal Oxide Varister) Simplest terms they work as sort of a surge suppressor. I wonder if that wire you found broken off might have caused a voltage spike which then took out the parts on the control board. :Thinking:
I'll look a bit later and see if I can find a wiring diagram for that unit which might have resistance reading checks for the armature and rotor windings and other components. Probably your best bet would be to replace the module complete rather then try to troubleshoot the parts further. Looks to be around $90-100 for it. Still a cheap generator if that is all you need now to get it back generating. :tango_face_smile:
Mark, thanks for your detailed reply. Looking at the spreadsheet data I found that MOV with my generator's information Part # CNA10D431K. I checked out ebay and found some but the Series information "CNA" was different. I found some with ZOV on them, ZOV10D431K - would these work or do I need the CNA prefix?
Thanks for taking the time to help me out, hopefully, I might be able to get it going.
Tim
You might click the support link and try calling or emailing them to see if they could send more troubleshooting information as far as anything else you could check given what you you have found so far, don't want to burn up the new board is there if still a shorted winding. My guess though would be replacing the AVR board would take care of it if the engine seems to be running fine at 3600 rpm, not over revving or showing any other signs of problems. After repairs you will want to measure your voltage out put and frequency to make sure if is correct.
I use a Kill A Watt meter to check frequency and voltage output on my Honda from time to time.
Not positive but think the prefix might be a manufacture code. CeNtRa (CNR)
You see Metal Oxide Varistor and Zink Oxide Varister kind of used interchangeably. Looks like the data sheet matches for each letter number combination so probably the same. But I would still try to get an exact match to the prefix and number you see on there in the circuit just to be safe.
I have another question for you. I just received the ZOV parts for the Coleman Generator. I was able to remove the soldering on the bottom of the board, unfortunately the top of the board has a thick "conformant" material on it. Can you see from the photo I sent you, what is this material is and how may I get it off. It is quite hard.
Tim
There is probably some sort of a chemical wash the board re-builders use to cut it. Or maybe they bake and melt them off. I don't know. But I usually melt it with my soldering iron until I can get the part loose I'm replacing. Makes for a real pain when replacing parts.
Soldering Iron it is, I will give it a try!
Thanks again,
Tim
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