Air compressor has no power to breaker or capacitor.

by Ryan Bob
(Bellingham, WA, USA)

I just took my Emglo in for repair because it has having a terrible time starting.


They replaced the capacitor, with what looks like a used one, and it seemed to run fine.

I ran it on an extension cord, then it tripped the breaker.

I reset it, then plugged it straight into the wall. It made a humming noise, like typical overload, then I heard a small "HISSING" (1-2 seconds) release from what I can only assume to be the pressure switch or something near there.

Now I have no power to the breaker or capacitor it seems, I checked both AC/DC on my meter just to be sure since I didn't know what current was being run.

I can only assume that it could be the breaker, pressure switch or the least likely of all, the capacitor (as it looked used)...

Any and all help will be greatly appreciated!!!

Thanks,

Ryan Bob

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Bill says...
The capacitor offers a quick power boost to help get the motor going, and to stop it from pulling too many amps on startup and popping the breaker in the electrical panel. It is possible that using a too-small in gauge extension cord chocked the current flow enough that even with the capacitor, there wasn't enough juice to get the motor going.

Plugging it into a wall should have solved that, provided that the same circuit didn't have a bunch of other stuff pulling amps at the same time the compressor was going to start.

The humming noise you heard sounds similar to the sound a motor will make when it's trying to start, and cannot.

When you say you have no power to the breaker, what breaker is that please?

Before you try to start your compressor again, bleed the air in the tank to zero PSI. Close the tank drain, and try again. What happens?

Please post your response as a comment to this thread so I can track the original and the new one.

Cheers,

Bill

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Feb 11, 2011
I fixed it
by: Ryan

Not sure why to blowoff was so quiet, after talking to a specialist he says some have 2nd valve that releases air(maybe that was the noise). The pressure had been reset, so this unit turned off early. Also, that extension cord draw causing the noise that it did right before plugging directly into the wall and having no power was all too coincidental.

So, as soon as I drained the air it worked fine.

Thanks for you time,

Ryan Hansen

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single ph,230v, 5hp, motor - capacitors and resistors are connected

by Nick Smith
(russia )

How capacitors and resistors are connected to the this type of motor ????

________________________
Bill says...

Any electricians out there want to help out Nick?

Thanks,

Bill


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