PolyScience F25N0A101B, Operator'S Manual, Page: 10 / 14

110-064 9
Troubleshooting
CAUTION:
Always turn the Power Switch / Circuit Breaker OFF and disconnect the electrical
cord from the power source before servicing the unit.
Problem Cause Corrective Action
Unit does not run
(all models)
No power to unit
Power Switch / Circuit
Breaker in OFF position
Compressor overload
switch has tripped Check that electrical cord is plugged into an operating
electrical outlet.
Place Power Switch / Circuit Breaker in ON position.
Allow approximately 10 minutes for unit to restart.
Check refrigeration condenser fins and air vents for
blockages.
Check that airflow around unit is not restricted and that
room temperature does not exceed 95°F / 35°C
Check compressor fan for operation (listen for fan noise,
check for airflow through unit)
No cooling or
insufficient cooling
(FT-25)
No power to unit
Blocked airflow
Fluid too hot for Cooler to
continuously cool
Insufficient flow rate
Fluid viscosity too high
Freezing at desired
temperature
Compressor overload
Insufficient electrical power
Compressor fan not
operating
Refrigerant leak
Compressor failure Check that Power Switch / Circuit Breaker is ON
Check refrigeration condenser fins and air vents for
blockages.
Check heat removal specifications. At less than 0°C, heat
loss to room may be excessive.
External reservoirs and tubing should be insulated where
condensation or frost occur. High power pumps can
introduce excessive heating.
Check tubing connections. Quick-connect fittings or tubing
less than 3/8 inch diameter may restrict flow. Flow should
be 3 to 15 liters/minute.
Use lower viscosity fluid.
Fluid freeze point should be 10° to 20°C lower than
desired temperature.
Shut off power for 10 minutes and then restart.
Check for proper voltage and frequency at power source
during startup. Voltage must be within 10% of rated
voltage. Use of extension cords may cause voltage drops.
Check compressor fan for operation (listen for fan noise,
check for airflow through unit)
Have licensed refrigerating service technician recover
refrigerant, locate and repair leak, evacuate and recharge
system.
Contact factory.
www. .com
information@itm.com 1.800.561.8187