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PLC input card
Replace if faulty
Evaporator Y-strainer clogged or dirty
Clean Y-strainer
Insufficient cooling
(temperature
continues to rise
above set point)
Process load too high
Check to make sure chiller is properly sized for
process load
Coolant flow outside of normal operating range
Adjust flow to proper level
Insufficient condenser cooling
See high refrigerant pressure
Refrigeration circuit problem
Contact refrigeration service technician
Temperature sensor
Replace if faulty
PLC input card
Replace if faulty
Erratic temperature
control
Low coolant flow through evaporators
Adjust flow to proper level
Overloading of chiller capacity
Check to make sure chiller is properly sized for
process load
Temperature sensor
Replace if faulty
PLC input card
Replace if faulty