28
Troubleshooting (continued)
Symptom
Possible Cause
Action Required
Drive
temperature
too high
No motor cooling
Check motor cooling solenoid valve
Insufficient sub-cooling
Check refrigerant charge
Faulty temperature sensor
Check sensor
Winding
temperature
too high
Faulty power bolt
Check power bolt continuity
Compressor
does not start
No cooling demand signal
Check temperature set points
Faulty chilled water temperature sensors
Check chilled water temperature sensors
No main power
Check power at terminal block
Low water flow
Check water flow
Drawings
We have prepared a customer set of drawings for your equipment and placed them inside the control panel prior
to shipment. Please refer to these drawings when troubleshooting, servicing, and installing the equipment. If you
cannot find these drawings or wish to have additional copies sent, please contact our Customer Service
Department and reference the serial number of your equipment.