canoeman
I have a 15kw 4772 propane, that has a starter solenoid that keeps engaging.
it makes a loud DING noise and the engine pulls out of sync.
the solinoid engages every 10 seconds or so like it thinks it is trying to start.
I ordere a new pcb conrol board, and see if thsat was it.
The unit also runs for a minute or so and turns off.
oil is full, coolant as well.
any ideas.
(waiting for the pcb in the mail)
canoeman
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bronco
I have to assume this is a liquid cooled unit. I think that the voltage regulator is bad not the control board. the starter is engageing due to the controller not seeing ac voltage.
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bronco
I think that the voltage regulator is bad not the control board. the starter is engageing due to the controller not seeing ac voltage.
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GEI3137
check res to rotor through brushes. I have found dirty slip rings causing high res through brushes and slip rings. Remove brushes and clean with brake cleaner, should have 15 ohms.
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ohmslaw
The grease from the bearing seems to be contaminating the slip rings.
We have repaired 6 units in the last two months with this problem.
Tim
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Sam
I had same problem?

Canoeman,
Are you sure your unit is a 4772? Just asking as that number does not look right. I have a 47220 which is the 15kw 1.6 litre Mits. water cooled, 1800 rpm, running on LP. I experienced the same exact thing. Your post stated you were waiting for the pcb to be shipped to you. I got mine fixed on 10.26.10. It was not the pcb,(thank god, LOL). Have you gotten yours fixed as of this writing? Let me know.
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hoghead
Sam , what was wrong with yours
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Sam
Hoghead, Sorry, I mis-spoke. My unit is a 1.5 litre Mits, not a 1.6 as previously written. Sorry, my bad. All other info. is correct. As it turns out when I started my unit I checked it at the main leads and there was no line voltage output. My starter engaged every so often while unit was running. I began reading through the 47220 diagnostic manual and followed Bronco's lead (9.6.10) as it made the most sense with the symptoms. I also noticed there was no LED. light output at the regulator as required for a properly operating regulator. I got another regulator and just unhooked the wiring in place and hooked up the new unit as I held it in place. (diagnostic elimination) and BANG, I had LED. lightup, the starter stopped it's engagement while running and line voltage was 238.00 at the breaker. I am running 88' of #2 copper to our Generac ATS and I knew I had about a 1.50 to 2.00 volt drop over that distance so I adjusted the voltage regulator at the outside breaker to give right at 242.5 give or take, and I checked at the box and it had right at 240 to 241. I then let the unit run about 30 minutes under heavy load (water heater and several appliances) and it ran great. I then ran about a 15 min. cool down and then shut off. I did also remove the rear screen cover off the generator to expose the pick-up brushs and I removed them and cleaned the slip rings and the brushes themselves with the non-chlorinated cleaner. After 150 hours they had some wicked thick black like sooty carbon on them, almost greasy like. It took me about 10 minutes to get the rag to come off of them clean. Thats it, it runs great now. Hope this helps someone.
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canoeman
replaced board no change

I replaced the main board, no change, starter still engaging momentarily.
I will try the regulator board next. thats the black resin encased board correct.

you were right about the number it is actually a SG0047220 SERIAL NUMBER 3646976.
NOW I HAVE A SPARE BOARD :-)
:D
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canoeman
regulator

I checked the regulator, and the led was not lit on the board, well running, so definatly ordering one.
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canoeman
Mine has about 500 hours on it, what is the life time of the 15kw model.
( I'm going to check out the brushes as well)
does anyone run theirs as a stand alone generator, with out the automatic transfer switch connected?
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jmct
Canoeman,
It probably doesn't help much, but I *plan* to run my 15kW as a stand-alone if I can ever get it to produce voltage. I am starting to think I have similar problem as y'all, though, since none of the LED's light up on my voltage regulator. What voltage regulator part is in your unit? My VR is a Generac Part 67680, which seems to be fairly common in 1990's era Generacs.
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canoeman
Solenoid keeps engaging

Well replaced the regulator, the pcb, and nothing changed.
No led lit, solenoid still engages, plus new battery.
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canoeman
Regulator

I replaced the regulator board with the newer model.

0f97190srv
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HKFever
ohmslaw;7244 wrote:
The grease from the bearing seems to be contaminating the slip rings.
We have repaired 6 units in the last two months with this problem.
Tim


canoeman;10986 wrote:
I replaced the regulator board with the newer model.

0f97190srv



Did you try what was recommended here?
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genme
HKFever;10987 wrote:
Did you try what was recommended here?
Also, did you have a trained Generac tech try to repair the unit?
Model 5875, Nexus controller, 999cc Engine, 20kW LP, 2011
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canoeman
Yes
I'll post pics of the generator murder and cremation
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canoeman
Trained generac tech, thats a good one, of the seven listed I called, one did repairs and he quoted me a 300.00 minimum to show up.
The rest had nice appliance sales business,s air conditioning, and my favourite, a refridgerator repairman.
The only guy to show up fiddled with it for a couple of hours and left with the 150.00 show up fee, and said, "those generators have too many compuers in em, I have no idea whats wrong with it.
Now thats impressive.
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DanB
canoeman;10990 wrote:
Trained generac tech, thats a good one, of the seven listed I called, one did repairs and he quoted me a 300.00 minimum to show up.
The rest had nice appliance sales business,s air conditioning, and my favourite, a refridgerator repairman.
The only guy to show up fiddled with it for a couple of hours and left with the 150.00 show up fee, and said, "those generators have too many compuers in em, I have no idea whats wrong with it.
Now thats impressive.


sounds about like the experience I had trying to find a good repair tech about 10 years ago for my Generac. Either folks wouldnt return calls, wanted what I considered excessive $$$$$ for a trip fee, or after talking with them it was obvious that I knew more about the genset than they did.
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bronco
Diagnostic manual #0F7698, sorry no link. test 1 should lead you to your problem. Sounds like you might have a stator gone bad.
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Skip Douglas SkipD
Click on [url=http://www.guardiangenerators.com/PublicPDFs/0F7698.pdf][COLOR=blue][U]this link for the 0F7698 Diagnostic Repair Manual[/U][/COLOR][/url].
Skip Douglas
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canoeman
Another example why not to buy generac crap

Just to prove a point, I contacted the only generac service compny who would return my calls.
They are 40 miles away, they wanted $575.00 minimum to come out.
That was LT generators, in Tarzana California.
I tell everyone, I meet, daily.
DON'T BUY--- generac generators, the service network is non existant, or made of thieves.
Once you buy it, your on your own, and you just blew $6000.00
DONT BUY GENERAC GUARDIAN GENERATORS!!!
Im going to start a facebook page today, about generac generators, and their service network, and the NON existant service program.
THEN ITS OFF TO ANGIES LIST WITH ALL THE SAME INFO.
MAYBE EVEN A WIKIPEDIA PAGE AS WELL, JUST FOR GOOD LUCK.
Screw generac.
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