JULABO F1000 Recirculating Cooler - Manual (Page 28)

Troubleshooting guide / Error messages
28 1.951.4806-V1
10. Troubleshooting guide / Error messages
+

Whenever the microprocessor electronics registers a failure, a
complete shutdown of the compressor and circulating pump is
performed. The alarm light " " illuminates and a continuous
signal tone sounds.
The LED temperature display indicates the cause for the alarm in
form of a code.
Press enter to quit the audible signal.
• The recirculating cooler is operated without bath fluid, or the
liquid level is insufficient.
Replenish the bath tank with the bath fluid.
• Tube breakage has occured (insufficient filling level due to
excessive bath fluid pumped out). Replace the tubing and
replenish the bath tank with the bath fluid.
Cable of the working temperature sensor interrupted or short-
circuited.
Sensor difference alarm.
Working temperature and safety sensors report a temperature
difference of more than 25 K.
Error in A/D converter.
The return temperature is above the switch-off value of the high
temperature protection (85°C). Check dimensioning of application.
Use a stronger recirculating cooler if necessary.
The leads to the high temperature protection are broken.