JULABO FPW50-HL Refrigerated Circulators - Manual (Page 80)

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 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

Press to indicate the help text in the LCD DIALOG-DISPLAY when
alarm messages appear.
The circulator is operated without bath fluid, or the liquid level is insufficient.
Replenish the bath tank with the bath fluid.
Tube breakage has occurred (insufficient filling level due to excessive bath
fluid pumped out). Replace the tubing and replenish the bath tank with the
bath fluid.
The float is defect (e. g., because damaged in transit). Repair by authorized
JULABO service personnel.
During the self-test after switch-on a short-circuit is registered between pin 2
and pin 4 of the control cable or the control cable is interrupted during
operation.
Reconnect the cable or eliminate the short-circuit.
 Excess temperature warning
or
Excess temperature alarm
Warn-Type:
Set to
>Warning< or >Alarm<
 Low temperature warning
or
Low temperature alarm.
Warn-Type: Set to
>Warning< or >Alarm<
The cable of the working temperature sensor is disconnected or short-
circuited.