oletrapper
I am new here. I have an Generac Centurion (2013) Mod. G006485-0. 20KW. The clock on the control panel is gaining time. Unit operates properly otherwise. Starts once a week at scheduled time but that has also changed as clock is not displaying correct time. It starts when the power goes off. I did maintenance on it yesterday and noticed the incorrect time. At 2:00pm it was displaying 1800 hrs which is 6:00pm.  The unit was purchased from Lowes and installed by a qualified licensed electrician.  I have searched the forums and can't find any other posts that have had this problem. Any ideas?
Thanks, Oletrapper, N KY
I have orbited the sun 76 times.
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Peddler
They don't keep great time, nor do they adjust for daylight savings time.  Just go into the edit screen and when you get to time hit enter and then updat it to the current time.
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Goofy4TheWorld
All of my clocks, including household clocks and the generator's internal clock, run fast when operating on generator power.  Practically all clocks use the expected 60.0000000 Hz utility power frequency to keep time, and most generators run closer to 61-62 Hz unless they are fully loaded, and this makes the clocks run fast.  Over time the difference can add up to a significant gap.  Only way to solve it is to make a point of running the clock back down every once in a while.
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MacL
The biggest problem with quartz crystal timekeeping is that the vibration rate of the crystal is mostly affected by temperature, and this clock is sitting outside.  Some high end quartz clocks made for accuracy have miniature ovens wrapped around the miniature crystal to maintain the crystal at a constant temperature.  But for the most part quartz clocks do not keep perfect time.

If you reset it only on an annual maintenance, it should never be more than 4 minutes off.
State your problem, not your diagnosis.
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oletrapper
Thanks to all. I have never reset the time. I have noticed that the auto run ,once a week, every Wednesday at 2pm has changed. I guess this is because the clock is incorrect.  Now all I have to do is figure out how to change it to the correct time. I can't locate my manual. Geeesh!  Oh well.  Thanks to all again.  Oletrapper, N KY
I have orbited the sun 76 times.
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george6488
Go to Zillers site and/or Generac's and download the manuals. Problem solved.
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MacL
Press ESC, use either arrow (up or down) to make SUBMENUS start flashing, press enter, arrow  until EDIT starts flashing, press ENTER to select the flashing choice, use the either arrow to scroll through the edit choices until is says "Current Time", press ENTER, use the arrows to select hour, minutes, and date, hitting ENTER after scrolling to the correct number for each field.  Be sure you use military time format.
State your problem, not your diagnosis.
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DanS26
I understand that grid utilities will adjust the frequency minutely to keep clocks on correct time.  So it's a problem everyone deals with.

https://en.wikipedia.org/wiki/Utility_frequency#Time_error_correction_.28TEC.29
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MacL
Quartz clocks run on DC voltage, your bedside clock, if digital, rectifies the ac.  Only older style clocks with synchronous motors are affected by frequency variations.  These in the generator will run just fine with no utility voltage connected to the generator.  
State your problem, not your diagnosis.
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