User guide

ME
55
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 VFD COMFORT-
DISPLAY.
Alarm without shutdown:
The code for the cause of alarm is indicated on the VFD COMFORT-
DISPLAY. The warning signal sounds in regular intervals. The messages
appear every 10 seconds.
Press the key
to stop the signal
Error message with ticker: >LOW LEVEL ALARM-FILL MEDIUM <
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.
Error message with ticker:
> REFRIGERATOR ALARM-CHECK CONNECTION <
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.
Error message with ticker:
> EXCESS TEMPERATURE WARNING-CHECK LIMITS <
Excess temperature warning
or
Excess temperature alarm
Type of warning: set to >warning< or >alarm< (refer to page 30)
Error message with ticker:
> LOW TEMPERATURE WARNING-CHECK LIMITS <
Low temperature warning
or
Low temperature alarm.
Typ of warning: set to >warning< or >alarm< (refer to page 30)
Error message with ticker:
> WORKING SENSOR ALARM-CALL SERVICE <
Cable of working temperature sensor is disconnected or short-circuited.