Thermal Care Accuchiller EQ Series, Руководство по установке и эксплуатации

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General Troubleshooting
Problem Possible Cause Remedy
Compressor will not
start Compressor overload Check supply voltage, amperage of each leg,
contactor and wiring, and overload set point
Compressor contactor Replace if faulty
Compressor failure Contact Customer Service for assistance
Pump will not start Pump overload Check supply voltage, amperage of each leg,
contactor and wiring, and overload set point
Pump contactor Replace if faulty
Pump failure Replace if faulty
Low refrigerant
pressure Low refrigerant charge Contact refrigeration service technician
Refrigerant leak Contact refrigeration service technician
Low refrigeration pressure sensor Check for proper range, replace if faulty
High refrigerant
pressure Dirty air filters (air-cooled units only) Clean filters
Air flow obstruction (air-cooled units only) Make sure chiller is installed in accordance with
recommendations in this manual
High ambient air temperature (air-cooled units only) Ambient temperature must be reduced below 110°F
Condenser fan motor (air-cooled units only) Replace if faulty
Condenser fan cycling control (air-cooled units only) Confirm proper operation, replace if faulty
Plugged condenser (water-cooled units only) Clean out tubes
Insufficient condenser water flow (water-cooled units only) Make sure chiller is installed in accordance with the
recommendations of this manual
High condenser water temperature (water-cooled units
only) Condenser water temperature must be reduced
below 100°F
Condenser water regulating valve Check setting, replace if faulty
Refrigerant circuit overcharged Contact refrigeration service technician
High refrigerant pressure sensor Replace if faulty
Freezestat Low flow through evaporator Adjust flow to proper level
Freezestat control module Check for proper setting (Protected Setting)
Freezestat sensor Replace if faulty
Low pump discharge
pressure Pump running backwards Switch 2 legs of the incoming power
Pump pressure gauge Replace if faulty
Pump failure Replace if faulty
Excessive flow Reduce flow
High pump discharge
pressure Closed valves in process piping Open valves
Obstruction in piping or process Remove obstruction
Clogged Y-strainer Clean strainer
Pressure gauge Replace if faulty
Erratic temperature
control Low coolant flow through evaporator Adjust flow to proper level
Intermittent overloading of chiller capacity Check to make sure chiller is properly sized for
process load
Hot gas bypass valve Contact refrigeration service technician
Temperature sensor Replace if faulty
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 through evaporator too high or low Adjust flow to proper level
Insufficient condenser cooling See “High Refrigerant Pressure”
Hot gas bypass valve stuck open Contact refrigeration service technician
Refrigeration circuit problem Contact refrigeration service technician
Temperature sensor Replace if faulty
Drawings
We have prepared a custom set of drawings for your
unit and placed them inside the control panel prior
to shipment. Please refer to these drawings when
troubleshooting, servicing, and installing the unit. If
you cannot find these drawings or wish to have
additional copies, please contact our Customer
Service Department and reference the serial number
of your unit.