referigeration screw compressor tripping on low oil pressure during startup

[svkd]

Hi Guys, we have referigeration screw compressor getting tripped on low oil pressure during startup.Its new installation , vendor is searching for the reasons for this.We have done some troubleshooting checked the oil injections lines to the rotors ,calibration oil control valves,strainers,pump clearances but the problems exhibits.

Any ideas???

 

[jari001]

My thoughts are:
Confirm right type of oil is in place
Flush and change the oil if possible
Confirm operating temperature is correct to ensure proper viscosity
Re-calibrate/replace oil pressure sensor/switch
Bypass oil pressure control to make sure something else isn't causing the issue(a wildcard)

Hopefully the vendor can comeback with something for you...