nomeea2
27-08-2013, 05:41 AM
Problem:
On temperature achievment the unit shuts down, the oil differential pressure reads
b to -1.04 and this condition appears on both the chillers for circuit A only. Action:Removed the transducers and inter-changed from other circuit known to be O.Kresults are same. Checked all hard wiring, cables and receptacles and terminating jacks, all O.K.Installed gauge with the transducers in question, to monitor actual pressure during fault conditions, gauge pressure is at positive, readings for the Diff. Oil Pressure at shut down on the display parameters goes to 0.04 to -1.04, at 0.04 it is still normal as the readings come down to -0.04 to -1.04 an alarm is generated and will have to be reset before the demand is called for cooling.
On temperature achievment the unit shuts down, the oil differential pressure reads
b to -1.04 and this condition appears on both the chillers for circuit A only. Action:Removed the transducers and inter-changed from other circuit known to be O.Kresults are same. Checked all hard wiring, cables and receptacles and terminating jacks, all O.K.Installed gauge with the transducers in question, to monitor actual pressure during fault conditions, gauge pressure is at positive, readings for the Diff. Oil Pressure at shut down on the display parameters goes to 0.04 to -1.04, at 0.04 it is still normal as the readings come down to -0.04 to -1.04 an alarm is generated and will have to be reset before the demand is called for cooling.