McQuay Chiller oil diff problems

[craigdyer]

Hi All,

I have a Mcquay air cooled chiller with 2 x HSA3221QY11YB-S compressors.

One compressor is faulting on high oil diff pressure fault.

We have changed the oil filters on both compressors but this compressor still faults.

Does anyone have an exploded drawing of this compressor and maybe theory of operation ect.

Any technical advise regarding this chiller would be much appreciated.

Kind Regards

Craig dyer

[moideen]

hi,crig, welcome to re.what is your chiller model umber

[craigdyer]

Hi Moideen,

Model is ENP142.2 XE-ST

Cheers

Craig.

[moideen]

have you check your oil pressure transducer,and provide the running parameters

[GHAZ]

Hi your discharge pressure might be too high or as moideen says the transducer needs calibrating

[craigdyer]

Thanks for you your quick answers )

How do you calibrate the transducer, I do not have lap top access to the controller or pass codes for controller key pad programming.

Any assistance would be greatly appreciated.

Kind Regards

Craig Dyer

[mohvendredi2011]

Any one have experience with excess oil consiquences on flloded oil screw compressor agr 212 mc quay

[mohvendredi2011]

Oil pump pressure -crank case pressure. Must be minimum of 01 bar. Called ney pressure