Problem
Cause
Solution
Cooling liquid is not
circulated.
Cooling liquid filter is blocked.
Air is trapped in the pump.
Clean the filter – See the Maintenance and
Servicing section for details.
Briefly remove the drain stopper.
until all trapped air has been removed.
Flow pressure is
reduced.
Tubing is trapped.
Pressure loss due to excessive
tubing length.
The circulator is too low compared
to the device it is cooling.
Check the tubing isn’t pinched, twisted or trapped
Try to reduce the overall length of the tubing.
Adjust the position of the recirculating cooler.
No refrigeration of
cooling medium.
Refrigeration unit is broken.
The cooling medium isn’t sufficiently
covering the cooling coil.
Overload of refrigeration unit
(alarm led illuminates)
Contact your local service representative.
Top up the cooling medium.
Lower ambient temperature below
35ºC, or raise set temperature.
Display does not
illuminate when
power is on.
No mains power.
Circuit breaker has tripped.
Fuse has blown.
Temperature controller is broken.
Check mains power supply.
Unscrew maintenance panel and check
switchable circuit breaker is in the on position. If
problem persists there could be an electrical
leakage and you should contact your local service
representative.
Follow procedure to change fuse in the
Maintenance and services section
Contact local service representative
Cooling power is
poor.
Refrigeration unit does not work.
The ambient temperature exceeds 35ºC
Exhaust is blocked.
Refrigeration air filter is blocked
Contact local service representative.
Try to lower the ambient temperature.
Check necessary clearance around the unit has
been allowed.
Follow the procedure detailed in the Maintenance
and Servicing section to clean the filter.
Water freezes in the
circulation tank at
+7ºC
Loss of flow pressure
Check flow pressure, see above
Use anti freeze for cooling medium.
Blinks on the display
Temperature sensor malfunction
Measured temperature is lower
than the units lower limit (-50ºC)
Contact local service representative.
Blinks on the display,
refrigeration stops
Temperature sensor short circuit
Measured temperature exceeds the
upper limit of the unit (more than
+40ºC)
The heating load exceeds capacity, reduce load.
Display is abnormal or
unstable:
Electrical noise causes abnormal
display on temperature controller
Temperature controller is reset by
electrical noise
Ambient temperature exceeds 35ºC
Turn off mains power, wait 5 seconds then switch
back on.
Move unit to a new location.
Lower ambient temperature below 35ºC.
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Instructions for use
Note: Alarm is cleared by turning off the power switch
