redman
RPM sensor fail.
Put in auto {multiple times}run less than 3 minutes shut down 1501 rpm sensor fail, put in manual been running about an hour no failure,
What's the downside on this, been on manual instead of auto, any damage?
know when utility comes back on, will have to put back in auto to shut down.
Thanks, Mike
Quote
Skip Douglas SkipD
What generator, Mike?
Skip Douglas
Quote
redman
sorry, in a hurry to get to next job.
model 62448 / serial 8210001 / 20 kW Generac
Quote
nrp3
Have 11kw with same fault waiting for me to return. Mobile link says verify fuel supply and I don't have my book with me. Started, tested ran fine at install. First exercise, ran into this.
Quote
Peddler
The evolution panel gets its rpm sense from the 18 wire coming from the coils. The signal is an AC voltage and I think should be about 7 volts as I recall, this also controls the stepper motor so if you loose a coil the unit will try to run at double speed for a few seconds and then fault on overspeed. I know this from painful experience as I had to replace the coils on a brand new unit and after I got it all back together I found that one of the kill wires got pulled off hence the overspeed. If it is running OK in manual but won't run in auto I would think the controller is the culprit. When the weather improves you could double check the 18 wire to the coils but it doesn't know the difference between manual and auto. The only thing you will have to do is manually shut the power down when the utility returns, it should transfer back automatically. Good Luck, Peddler
Quote
nrp3
When you have time to share what you found please share. I won't be onsite with mine till next Saturday at the earliest.
Quote
redman
Thanks Peddler,
looking in the Diagnostic repair manual page 131, it talks about it, as Evolution E-code 1501 / 1505 / 1511 / 1515, but doesn't really tell you how to fix it. just says, this could be a faulty crank circuit or a faulty starter.
Its a "latch alarm" and found on flow chart, page 162.
I have seen this on dealer network, need to go back and do more research.
Thanks, Mike

footnote: wish we had gotten snow, this ice is no fun
haven't seen this many trees down since hurricane Fran.
Quote
nrp3
Looking at the log on the mobil link, it looks like mine tried a couple of times to start and run, the first time for about a minute, the second time for a few seconds and then latched out. If it ran for a period of time, wouldn't think crank circuit.
Quote
Peddler
Also keep in mind that RPM sensor loss can simply mean the generator quit running or failed to start. It can be a substitute for overcrank. When it is a true rpm sensor loss the latching fault wil only be a few seconds after the start command. Good Luck
Quote
redman
nrp3, not sure, just typed in what was in diagnostic manual.
only reference to it I could find in dealer network, was 1 person asked about it, but no one ever replied to him about it.
just wondering if installing the new firmware up-date would help, since it would put a longer period of time during cranking, before it would shut down in alarm, but that's the under voltage alarm problem, not sure?
Mike
Quote
nrp3
This one came off the line with the most up to date software. Can only guess until I get there.
Quote
MEC
Saw your post.
I'm sure Mike B will get back to you on that. They broke the mold with him, not many people that will go out of their way to help you anymore. A true asset to Generac.
Quote
redman
yes, he is a Good Guy.
Do you know if Rodney is still there?
Mike
Quote
MEC
Haven't talked with Rodney yet.
Seems like they have quite a turnover with sales reps, hopefully that's not the same with tech.
I've easily been through a few reps each year.
Quote
redman
Rodney, was the head of technical for a long time, but haven't talked to him for awhile. Sales turns over way to much for me, bet I have had 15+ sales people over the years, very frustrating.

Mike B sent me an e-mail this morning, and I talked to tech. services too, they are saying to up-date the Evolution controller and see if the 1501 alarm goes away, if not let them know.

Generator as of 7 pm tonight is still running in manual, utility power has not been restored yet, going into 96 hrs. run time tomorrow afternoon.
Homeowner tells me he is turning off every 8 hrs. and checking oil, and let rest for 30 minutes, then starts back up.

Still have not been on-site to actually see generator yet, this has been communication between homeowner and installing electrician.
Thanks Mike
Quote
MEC
Wow, so it's not just me. Has to be frustrating for the other dealers as well.

I'd be curious to see how much oil was used after that amount of time.
Have a 10kW unit that I took over that was only a couple of years old which has close to 800 hours on it. I thought it was a mistake at first, then I found out they used it to build a couple houses in the subdivision....
Quote
nrp3
Came to check on mine. Starts and runs well both manually and on auto during simulated power outage. 70 percent of 1000gal tank with no other appliances. Keep watching on mobile link. Both regulators have clean vents that I can see.
Quote