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Old 06-27-2017, 10:30 PM   #1
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Generator Under Frequency Message

I'm dry camping at Bear Lake state park right now and my generator just died. When I tried to restart it an "under frequency" message appeared on the control panel. The generator started anyway and, obviously, nothing would power up but I also couldn't shut off the generator via the control panel. I opened the cover on the generator and the red light on the manual start switch was flashing. I manually shut down the generator. Checked propane level and have plenty.

Any ideas?
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Old 06-28-2017, 02:32 AM   #2
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Does the flashing light on the switch match the code for low frequency? Are you able to confirm low frequency with a meter? As you may know, low frequency corresponds to engine speed which is less than 3600 rpm. Propane tanks full? Just a few of the things to check. BTW, the flashing light code van be found towards the back of your operator's manual.
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Old 06-28-2017, 03:00 AM   #3
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Unfortunately I don't have a frequency meter and I left the manual at home. I'll search up the manual online. BUT even though I have plenty of propane, I switched tanks and after a two hour wait I fired it back up and it seems to operate normally. There quite a bit of ice on the tank and I think there just wasn't enough pressure to supply fuel.
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2017 Ram Longhorn 3500 Cummings/Aisin DRW LB CC and a cute little aftermarket fuel cap
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Old 06-28-2017, 04:51 AM   #4
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Quote:
Originally Posted by MuddFlap View Post
Unfortunately I don't have a frequency meter and I left the manual at home. I'll search up the manual online. BUT even though I have plenty of propane, I switched tanks and after a two hour wait I fired it back up and it seems to operate normally. There quite a bit of ice on the tank and I think there just wasn't enough pressure to supply fuel.
My Fisher Pakyel dishwasher would not operate one day. After waiting for a few days for the FP technician he replaced all the electronics, motor/pump and heater with no luck. He left with a "will need to replace the dishwasher" comment. As an old retired EE I was curious as to the power coming in. On the "post" I was at 55 HZ, 120 VAC. On the gen, I was at 56 HZ. The tech wanted to stay on the gen as he stated "park power is not good stuff". He was correct - the park power was at 55 HZ. When he left I got out the Onan Gold 6.5 KW manual and found how to adjust the frequency. It was a very simple adjustment which, when I set it at 60 HZ on my digital voltmeter/AC/DC ammeter/frequency meter the dishwasher worked fine. The meter cost about $75 at Home Depot or Lowes (not sure which one). The DC clamp-on side of the meter is also handy for checking DC and AC amperage of motors/pumps and battery loading.
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Old 07-02-2017, 03:45 AM   #5
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So I "think" I figured out my problem. I ran the generator on street side tank and when that tank ran out of propane the switch over valve switched to the other tank but the other tank apparently has a bad valve and wouldn't let enough propane through to run the generator.
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Old 07-02-2017, 04:30 AM   #6
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So I "think" I figured out my problem. I ran the generator on street side tank and when that tank ran out of propane the switch over valve switched to the other tank but the other tank apparently has a bad valve and wouldn't let enough propane through to run the generator.
Probably the small regulator on the curb side bottle (known problem) has messed up & not the bottle valve. BTW when opening the bottle valves slowly or the safety device could shut the flow down.
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