overload trips once evry morning before we open.

by Dan Welch
(Roseville, CA, USA)

We had a 3phase 208v compressor that the tank developed a leak. We replaced it with a smaller single phase 208v unit.


The compressor runs great all day has no problem keeping up with demand.

Every morning for the last month the overload on the back of the motor has been tripped. We push the reset and the compressor will run great all day, next morning same thing. We though the first compressor might have an issue so this is the second same type unit and it has done the same thing for the past week.

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Bill says...

Dan, I think I'm going to rely of some experts out in visitor land to try to help you with this one. Anyone have any ideas?

One this that is not clear, are you shutting the compressor off before you close down for the night, or, is the compressor left on? Reason I ask is that the reset is often motor-heat related, and if for some reason the compressor would be running too long at night...?

Cheers

Bill


Comments for overload trips once evry morning before we open.

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Apr 16, 2014
TOO COLD
by: Anonymous

ITS BECAUSE OF COLD OIL IN MOTOR, PUT A HEATER NEXT TO IT ONE NIGHT

Dec 09, 2011
follow-up info
by: Dan W

The compressor is left on since this compressor runs a self serve air station as well as running the tool's in our repair shop. The weather for the last month has not got above 75degrees and the mornings have been in the low 40's. We do not have many customers that come in late at night or early morning to use the services. I know that the overload would trip due to heat or if the unit had power issues. However during business hours after we have reset the overload the compressor turns on and off all day long no matter how many tools we have running at the same time. And I have checked the compressor about an hour after the repair shop closed and the compressor was still online the voltage was still at 208v and I watched as the compressor went through two more cycles on and off.

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Thanks for the update. Sounds like something happens to the power supply during the night, but aside from sort of spike while the compressor is running, I don't know why you have to reset it every morning.

Anyone else have any ideas?

Thanks,

Bill


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air compressor running off genorater power blowing start copacitors

I run my compressor off of genorater power but it keeps blowing thestart copacitor!!
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Is the power supply adequate for the demands of the air compressor?

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Compressor motor trips after 7 seconds with no load

by Kevin
(Australia)

I replaced the run capacitor on my (older) compressor motor. Now it only runs normally for 7 seconds before tripping out?

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Jul 07, 2014
motor cap
by: Doug in s.d.ca

What was it doing before you replaced the cap?

Are you sure it is the correct cap for your motor?

By no load, you mean it's belt drive with no belt(s), or?

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Valley twin pot compressor runs for 5 to10 secs then blows fuse

by Arthur Lewis
(Shrewsbury. England)

Valley air compressor

Valley air compressor

I have a valley twin pot 3hp 50litre compressor in my garage for general d.i.y jobs,just lately I had terrible trouble trying to get it to start, it would take two or three fuses before it would continue to run after it had started it would run fine for the duration of the job you were doing, so on sat I tried to investigate I took both pots off cleaned everything up there was no damage or any excessive wear so I put everything back now it starts up first time every time but only runs for 5 to 10 secs before it blows the fuse. Can you help please. Arthur Lewis
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Arthur, by cleaning everything up on your Valley air compressor, I suspect that you reduced the start up load, allowing the air compressor to start. I also suspect that the root cause of the problem is the run start/run capacitor.

See the page on the this site about checking the caps to see if that is the issue.

Cheers,

Bill

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