Section VI Troubleshooting
Checklist
Unit will not start
Check the position of the optional circuit breaker on the rear of the unit.
Check the line cord; make sure it is plugged in.
Check that the Power Switch/Circuit Breaker has not tripped.
Check the setting on the optional High Temperature Cutout.
Check the voltage of the power source. Make sure it is within the rated
voltage of the unit, ±10%.
CFT-300s and some CFT-150s units are equipped with high and low pres-
sure switches. If either switch activates the unit will shut down. Once the
cause has been determined you have to manually reset the switch. The
switches are located behind the rear panel, see Section IV, Operation.
Unit will not circulate fluid
Check the reservoir level. Fill, if necessary.
Make sure the pump has been purged.
Check the pressure gauge (units with PD pumps). If the reading is 60
psig, check the instrument being cooled for restrictions in the cooling line.
Check the pump strainer (units with PD pumps). A clogged strainer can
starve the pump.
Inadequate temperature control
If the temperature continues to rise, make sure the heat load of the
instrument being cooled does not exceed the rated specification, see
Section II, Specifications.
Make sure the air intake and discharge are not impeded and the ambient
temperature does not exceed +35°C.
Make sure the condenser is free of dust and debris, see Section V,
Cleaning.
If the compressor short-cycles (a clicking sound), check the line voltage.
It should be within the 10% of the specified voltage. Wait 5 minutes
before restarting the unit.
Service Assistance
If, after following these troubleshooting steps, your unit fails to operate
properly, contact our Service Department for assistance (see Preface, After-
sale Support). Before calling, please refer to the serial number label on the
rear of the unit to obtain the following information:
- unit BOM number
- unit serial number
- voltage of unit
- voltage of power source
- software version
To Next Page
Loading...
