10kray
I have a 10k, air cooled LP Generac Generator, it has 900 hrs on it. It was service apprx. 200 hours ago. Recently we began to get "no sense RPM" code from the led screen, the Gen doesn't even crank.

I charged up the battery, cleared the code, but it just kept coming back. All you hear is after a 3 second delay the "No Sense RPM" code come up.

I checked the cable to the stater motor, it checks ok, after hours of sitting idle the generator will start up when I try it. I'm thinking could it be the fuel choke solenoid? Any ideas on what to look for? I have a GT530 , Model 5502.
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douglas123
10kray, I have been out of town the past few days. Would love to assist. Can you post complete model and serial number? Serial numbers will give you a faster response. That is how I can access your unit without seeing it. There are so many different models and revisions.
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ohmslaw
10KRay,
If the unit does not crank the choke is not the issue. Focus on the battery/starter circuit.
Tim
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10kray
Thanks guys for your answering my question. I will be going up to the cabin, where the gen. is soon. As you probably know it's hot as heck up here in NY not the best time to be in the woods working on a gen. in the midst of being swarmed by mosqitoes etc. I will remenber to get all the serial numbers etc. I will go back and re check the bat/starter circuit again as we do have a problem with the battery charger not charging the battery. This is probaby not the right generator to use as we are off the grid by three miles, we use it in manual mode because there is no utility. Te only use we have for the transfer switch is to go from propane gen. to a gasoline gen. to the breaker panel. I just purchased a 20 watt solar panel which I will hook up to the battery for a constant charge, of course useing a controller so as not to overcharge and hope that keeps the battery charged enough to resolve that issue. I can't thank you guys enough for this site, it's a God send. 10kray
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ohmslaw
Where in NY is it? A eco gen would be a great alternitve.
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10kray
We are in Forestburg,NY What is an ECO gen? We have a gasoline generator but it's a hunting and fishing club and several members use it. The problem with the gasoline is nobody ever remembers to bring in gas when they arrive, so the propane gen,(Generac 10k) is so convienent as we have a remote toggle switch wired into the cabin, just trow it on and you have lights, pump water etc.

For whatever reason we cannot rely on the battery charger that came with the gen to keep it charged enough. As we don't have constant electricity we can't trickle charge the battery, hence the solar panel decision.We have 900+ hours on it already, we do get it serviced as recommended but we're trying to assume those responsibilities ourselves as it is costly.

So I thank you for your knowledge and imput and if you don't mind explaining what is a eco gen? Thanks, 10kray
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Skip Douglas SkipD
Are you checking the electrolyte (fluid) level in the battery fairly frequently? It's very possible that a solar charger with no regulation or control circuitry could overcharge the battery. That makes the electrolyte boil out, eventually exposing the plates and that makes for a potentially bad problem.

My suggestion would be to use a solar panel with a proper control circuit to control the current into the battery while monitoring the battery voltage and cutting back on the charge current when the voltage gets to a little over 13 volts.
Skip Douglas
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techntrek
He mentioned above that he'll be using a charge controller.

10k, good idea to add a solar panel to keep the battery topped off. Just make sure the panel can get full sun at least between the hours of 9 and 3, and angle it properly for your latitude.
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Skip Douglas SkipD
techntrek;9654 wrote:
He mentioned above that he'll be using a charge controller.
I guess there are times my old eyes don't quite pick up on something. :rolleyes:
Skip Douglas
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techntrek
I figured you had just missed it, the mention is buried in the post. No big thing! :)
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VHF
My 5502 has a charger in the ATS that is powered by either utility or generator power; there is no "on board" charging circuit in the generator itself. The charger is a small trickle-charge style charger; in an off-grid situation, the battery would not be adequatly recharged while running.

Also, unless the toggle switch in the cabin interupts all 12V power to the control board, the control circuitry will drain a battery in a matter of days. If the generator was reconfigured for "two-wire start" I would guess the control board still consumes battery power continuously.

A solar pannel should take care of keeping the battery topped off and making up for the power consumed by the control board.
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10kray
Thanks for the tips guys on the battery charger. I am using a two-wire start toggle switch. I purpously blew the 7 amp control panal fuse and wired that to another 7 amp fuse in the circuit going to the cabin toggle switch, I kept the blown fuse in the control panal slot to complete the ckt. is there another way I should have done this to save the battery from drain?

Also, I found the positive battery clamp had a break in the connector which caused the unit not to start due to a poor connection, I replaced the connector and the unit started ! I thank all those who kept me on the right path with the starter circuit.

I now see when the generator is cranking, with the top cover open on the left welded hinge sparks! The generator is grounded with a 7 foot rod driven into the earth with a copper connector, any ideas on the cause of this?

Thanks, 10kray
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Skip Douglas SkipD
10kray;9882 wrote:
I now see when the generator is cranking, with the top cover open on the left welded hinge sparks! The generator is grounded with a 7 foot rod driven into the earth with a copper connector, any ideas on the cause of this?
It sounds to me like you need a technically competent troubleshooter to check out your unit fairly soon. That sparking could be a really bad thing if you have even the slightest gas leak in the generator's cabinet.
Skip Douglas
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johnc
If you are getting the sparks while the gen is cranking, could be caused by starter cable touching the cabinet. If sparks while gen is running follow Skips advice.
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10kray
Johnc, I only get the sparking while cranking. Skip D, thankyou for your post I thought of that possibility also but now I'm glad you noted that concern. This started after we got the generator starting again, (cranking), I'm wondering now if that was or is a reason for the drain on the battery as well a shorted positive battery cable to the unit itself? I did notice the positive cable is very taught, not much slack at all, I'll go back and try to see if this is the problem thanks again guys. Ray
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Skip Douglas SkipD
10kray;9929 wrote:
I did notice the positive cable is very taught, not much slack at all, I'll go back and try to see if this is the problem thanks again guys.
Ray, pay particular attention to every place that the positive cable goes around something. If the cable does not have slack in it, it's entirely possible that the insulation has been re-shaped (thinned out where it goes around a corner, for example) to the point where it is no longer insulating the wire at that location.
Skip Douglas
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Jack Hottel
I'm not familiar with your unit, but sparking at a hinge while cranking sounds like the sheet metal is conducting starting current. I would check the negative battery cable connection to the frame or engine block and any bonding cables between them.
Jack Hottel
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10kray
Hello gentlemen, it's been awhile. I had downloaded some trobleshooting tests to perform and began to follow those instructions to discover we had a shorted starter motor. I then called the generac technician in and we had it swapped out still under warranty, thank God, then we got things cranking again to discover another problem, the negative battery terminal was shorting out to the frame, hence the sparking, thanks "Jack Hottel" right on the money! We got everything running great, then another problem turned up with the choke, that to is under warranty and will be replaced. All in all the gen starts up nicely runs well, we had the maintainance performed so going foward we hope to be happy campers and hunters. Thanks to everyone on this site for all yourr knowledge and support on this process. I expect we will be corresponding again, hopefully not too soon, happy holidays to all. Thanks again, 10ray
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