Generac Electrical Supplies - Recent Questions, Troubleshooting & Support


There isn't much you can do with servicing the generator set or transfer switch unless you've got lots of experience in diagnoising semi-conductors and electronic components.

Depending on the age of the system, it would be benificial to have a qualified service tech take a look at it.

As an electrician, I've installed several back up generator sets in homes for customers and have had a few of these automatic transfer switches with intermittent operation issues. Sometimes it's the switch and other times it's the Generator that is causing the problems.

Hope this helps, and best regards!

Generac 100 Amp... | Answered on May 23, 2020


Connection between ATS and generator:
220V signal line is connected to generator control cabinet terminal (D2 and D3)
https://www.dieselgeneratortech.com/generator-sets/conversion-between-diesel-generator-and-mains-through-ats.html
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Generac 100 Amp... | Answered on May 23, 2020


Regarding the advice about "Flashing" a generator.
Do you people even know what that means?

What you are doing is messing with the capacitor that is part of the voltage conversion. Likely you are burning any shorts out of the capacitor. Has noting to do with the fields or coils or rectifier.

So if you are having issues then test the capacitor and replace it.
Try your flashing and see if you don't fry the rectifier.

It amazes me that people will blindly follow something they don't understand "hoping" that something good will happen.

But if a new generator is what you want then give your old one away instead of trashing it.

Generac... | Answered on May 13, 2020


During engine cranking and operation the controller receives AC
voltage and frequency signals from the ignition magneto via Wire
18. Should the speed exceed approximately 72 Hz (4320 RPM),
the controller's logic will de-energize the "run relay" (internal to
the controller). The relay contacts will open terminating engine
ignition and closing the fuel shutoff solenoid; the engine will
then shut down. This feature protects the engine and alternator
against damaging over speeds. During cranking the RPM signal
generated by the magnetos is used to terminate engine cranking.

Generac... | Answered on May 09, 2020


If you have a Generac Generator which fails to start during a power outage and gives an Error Code 1518 - RPM Sense Loss you can try and manually get the generator restarted very simply. ... The generator should wait 5 seconds and then try and auto-start up to 3 times.
https://www.justanswer.com/small-engine/bwmwi-working-generator-generac-protector-qs-38kw.html

Generac... | Answered on Mar 25, 2020


it is not producing voltage...

Generac Air Cooled Generators - Ziller Electric Inc ' Interactive Generac Generator Forum

https://www.google.com/search?q=generac+overspeed+fault&rlz=1C1OKWM_enUS816US816&oq=generac+overspeed+fault&aqs=chrome..69i57j0l6.5183j0j8&sourceid=chrome&ie=UTF-8

Generac... | Answered on Mar 11, 2020


i suspect you need a new controller. try asking here. read the rules before posting https://www.zillerstore.com/?forum=705132

Generac... | Answered on Dec 18, 2019


If you want to have a new diesel generator set in future, please visit the website for your reference: https://starlightgenerator.en.made-in-china.com/

Generac... | Answered on Dec 10, 2019


You can ask your supplier or check according to the maintenance manual.

Generac... | Answered on Nov 30, 2019


If you need to have a new diesel generator set in future, maybe you can contact [email protected] They are a manufacturer of diesel generator set for more than 43 years.

Generac... | Answered on Nov 05, 2019


If you need to have new diesel generator set, maybe you can contact [email protected]

Generac... | Answered on Nov 05, 2019


I has this problem after performing Schedule A maintenance. Called Generac. They advise this a trip caused by removing the fuse before work to prevent engine start up, The fix is to turn unit in off position and then press ENTER key.

Generac 20 Kw... | Answered on Nov 01, 2019


Do you have maintenance manual? When you buy the generator, it must have manual. If the manual do not say about it, you are better to contact your supplier, then you tell details with them. Because different situation, will use different solutions. If you need to purchase new diesel generator set infuture, maybe you can visit : wwww.dieselgeneratortech.com, they have focused on high quality generator for 40 years. Or by email: [email protected]

Generac... | Answered on Oct 30, 2019


Check "F1" fuse.

If fuse is good, check voltage at battery.

With either utility power present or generating running, the voltage at the battery should be >13VDC. Any reading less than 12.7VDC is battery voltage and indicates a failed charging circuit.

Generac... | Answered on Oct 23, 2019


If it is new, you should contact the seller and/or manufacturer for warranty - before you attempt to service yourself. Follow their instructions to troubleshoot / diagnose

Generac... | Answered on Oct 21, 2019

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