Compressor trips it's own breaker when it tries to autofill.

by Nicole
(Vancouver BC Canada)

So... I bought this thing on Craig's list. I swear, the number of times I buy stuff on there and have to spend more money when I get it home and try to use it.... Anyhow. The twin tank (unknown horsepower) air compressor that I bought fills the first time, however, it seems like it does struggle a bit to get the oomph to start going. Fine, it fills. Then I use it and the pressure goes down. It trips it's own breaker when it tries to auto fill.


What is the problem and what do I have to do to fix this so that I can use it normally?

I also would like to know what other kinds of maintenance I can perform on the machine so that it runs more smoothly. ie: so that it doesn't seem to draw as much power upon start up.

Much gratitude.

Nicole
Vancouver BC.

-----------------
Bill says...

You cannot affect the amount of electrical inrush your compressor needs to start. That is predicated by the motor.

What helps give your motor the oomph to start is the start capacitor. If yours is failing, that needs to be checked. It's located on the motor as a norm.

Before you do that, open the tank drain and drain the tank down to 0 PSI. Close the drain, and turn the compressor on again. You say it should start and run up to cut out pressure. As it approaches the cut out pressure level, watch the unloader valve when the pressure switch shuts the compressor off. Does air blow out of the unloader valve at shut off? If not, the unloader valve might be your problem.

As to maintenance, don't run beyond it's Duty Cycle, and make sure the oil is filled properly.

Cheers,

Bill

Click here to post comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Troubleshooting.

Setting up the hoses for 5000 PSI

I have a compressor regulated at 5000 psi for the use of filling a paintball tanks and not seem to get the hoses to regulate any pressure. Is there any way of setting a up a wiring diagram for a gas driven air compressor.






Bill answers...

Hi Dave, and thanks for writing in.

I'm sorry, but I don't have any idea what you mean by getting the "hoses to regulate any pressure".

When you say you want a wiring diagram for a gas driven air compressor, sorry, once again, I'm in the dark.

Can you provide a bit more information, please?

Thanks,

Bill



Click here to post comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Troubleshooting.

overheating at the first stage.

by john wansa
(edmonton, Ab)

On a two stage compressor the first stage cylinder is overheating, what can be causing that?






Bill says...

Hello John.

The cylinder heads on all reciprocating air cylinders get very hot. That's why the air line into the tank from the head must be of a heat resistant material.

In your case, I'm understanding that the head is getting hotter than normal, yes?

Overheating can be caused by insufficient lubrication, mechanical wear that's increasing friction, maybe even a partially blocked transfer line generating more heat as the air flows through the reduced orifice... many issues.

I wish I could be more specific, but I don't know enough about your compressor installation to do so.

Regards,

Bill

Click here to post comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Troubleshooting.

Regulator will not shut off the compressor !

by David

I have a old compressor M/D 32396 stage CCW, the regulator will not shut off the compressor it keeps running until the pop off vale go's off what part do I need to buy thank D Bond






Bill answers...

Hi David, and thanks for writing in.

Just to make sure we are both "on the same page", the regulator on an air compressor is used to set a specific pressure level for air tools downstream from it. It has nothing to do with turning on or shutting off your air compressor.

It is the pressure switch that has the job of turning your air compressor on when the pressure in the tank falls to the cut-in pressure level, and it's the pressure switch that shuts the compressor off when the pressure in the tank reaches the high pressure cut-out level.

Inside the pressure switch there are contactors that open and close in response to the pressure in the system.

When the pressure falls to the cut-in level, the pressure switch shifts, and the contacts close, allowing electricity to flow to the motor so it will start.

When high pressure is reached, the contactors open, and the electricity to the motor is stopped, as does the motor and the compressor.

What I think is happening with your compressor system is that the pressure switch has malfunctioned, and even though the pressure in the system reaches the cut-out pressure, the pressure switch doesn't shift, and the motor keeps running.

The PRV (pressure relief valve) is there for just this circumstance, and thank goodness it is, as otherwise, the pressure in the system would reach unsafe levels.

In your shoes, I wouldn't use my compressor again until I got the switch replaced. It's not too hard to do, but even if you aren't up to doing it, get it fixed.

Cheers,

Bill

Comments for Regulator will not shut off the compressor !

Click here to add your own comments

Mar 31, 2011
Compressor won't shut off
by: Anonymous

I have husky compressor 32 gal WL660800AJ oil free.Compressor buil up pressure around 120 - 125 psi and run.Pressure don't go up but compressor will run and not shut off.What can be wrong????

_______________
Go to the Troubleshooting page, and click the link to the pages on why compressors won't build pressure. After doing the checks, if you still have an issue, post another comment here, OK?

Click here to add your own comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Troubleshooting.