JULABO MA Heating Immersion Circulator - Manual (Page 42)

Troubleshooting guide / error messages
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10. Troubleshooting guide / error messages
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Alarm with complete shutdown:
If one of the following failures occur a complete, all-pole shutdown of the
heater and circulating pump is effected.
„ “ lights up and a continuous signal sounds.
The code for the cause of alarm is indicated on the MULTI-DISPLAY
(LED).
Warning without a complete shutdown of the unit
The MULTI-DISPLAY (LED) indicates the cause for the warning in form
of a code and an acoustic signal sounds in regular intervals.
These messages appear every 10 seconds.
Press the key to stop the signal
Low level alarm
The circulator is operated without or insufficient bath fluid.
Switch the unit off with the mains switch, refill bath fluid and switch on!
Tube breakage has occurred (insufficient filling level of bath fluid caused
by pumping-out)
Replace the tubing and refill bath liquid.
The float is defect (e.g. transport damage).
Repair by authorized JULABO service personnel.
During the self-test after switch-on a short –circuit is detected between
pin 2 and pin 4 of the control line or the control line was disconnected
during operation.
Reconnect the control line or repair short-circuit.
Excess temperature warning
or
Excess temperature alarm
Type of warning: set to >0 = warning< or >1 = alarm<
Low temperature warning
or
Low temperature alarm.
Typ of warning: set to >0 = warning< or >1 = alarm<
 Cable of working temperature sensor is disconnected or short-
circuited.
Defect of working or excess temperature protector.
Working temperature sensor and excess temperature protector report a
temperature difference of more than 35 K.
Other errors
Internal hardware error – call service