JULABO LC 6 Programmable Controller - Manual (Page 40)

Troubleshooting guide / Error messages
40
9. Troubleshooting guide / Error messages
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Whenever the microprocessor electronics registers a failure, a complete
shutdown of the heating device is performed.
The alarm light " " illuminates and a continuous signal tone sounds.
 Cable of the working temperature sensor interrupted or short-
circuited.
 Other errors
 Error in A/D converter.
 Safety sensor defect.
 The safety temperature value lies below the working temperature
setpoint.
Set the safety temperature to a higher value.
 External control selected, but external Pt100 sensor „EXT“ not
connected.
 Heating circuit interrupted.
 Heating circuit short-circuited or interrupted.
 Defective alarm relay.

60
30
15 45
4 s
 Press enter
to quit the audible signal.
 After eliminating the malfunction, press the mains power switch off
and on again to cancel the alarm state.
If the unit cannot be returned to operation, contact an authorized
JULABO service station.
Fuses
 The mains fuses on the rear of the unit may easily be exchanged as
shown on the left.
 Fine fuses
230 V, T16 A, dia. 5 x 20 mm
115 V, T12.5 A, dia. 6.3 x 32 mm
T1.25 A, dia. 5 x 20 mm
Warning:
Before exchanging the fuses, turn off the mains power switch and disconnect the
power plug from the mains socket!
Use only fine fuses with the specified nominal value.