ADT high and tripping on ESD-442 / 12 bar

by javed Khan
(Pakistan )

We have ESD-442/ 12 bar sigma2 controller. we are facing troubleshooting on it.

Compressor run and 3 to 5 minute, temperature rise to 109 c and tripped.

We have changed Oil filter, Check the Pressure Switch, clean the Oil cooler, Top Up oil, check the Oil regulating valve, check the oil Separator Cartridge, but the problem is same.

Kindly some one suggest some action to take.

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Aug 20, 2015
Couple of other things
by: Carl

You say this is an ESD, these machines are relatively new, are you sure its not still under warranty?

Also you say you have checked the pressure switch? This is controlled by the controller so how did you check it and why did you check it as the compressor is over heating?

How did you check the separator cartridge?

Answering these questions would really help.

Kind Regards


Aug 20, 2015
by: Carl

Hi, you say you have cleaned the cooler, when you run the machine, does the cooler get hot?

Is the thermo valve (thermostat) operating?

If the cooler remains cool (or from cold, look at the temperature, does it go up then down again?)

Secondly, is the temperature reading going up slowly or does it "dance" up and down erratically?

Let me know, we'll get to the bottom of this.

Aug 19, 2015
Scavenger tube
by: Doug in

Did you check it is in correct position and not clogged?

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