If you have a poor / low water flow then the control circuit could overshoot and one of the resultant issues can be LP. You could always isolate the comp / suction line and reclaim into the evap /...
Oil pump was guys.It went to 4.5 bar diff.But the next problem is that the controller loads the compressor but no change in amperage,and sound.What could be the problem?
If you're referring to #9 oil pump gauge access, no. That port is only used for checking compressor oil pressure (which is rare) definitely pressures are low. Were you able to find a leak in...
Will treat with caution! If in doubt out comes the gas!



Good to know and glad you are getting somewhere. Thanks for the update. Interesting info! Grizzly
McQuay ALS260C screw chiller...