Error messages/Troubleshooting
43
Further information
Error
Possible causes
Remedies
Current interface functions incorrectly
- Incorrect measured value at the output or
no power supplied
Replace fuse F7
Replace the interface circuit board
Unit is not functioning, even though it is
switched on
No display
-
Fuse F9, F5 or F2 (240 V: F1) defective
- Power switch defective
- Ribbon cable at display circuit board or
base circuit board is loose
- Error at display circuit board or base
circuit board
Replace fuses
Replace power switch
Reconnect ribbon cable
Replace display or base circuit board
Tripping of a protective circuit
After a protective circuit (fuse) has been tripped, attempt to eliminate
the cause of malfunctioning (e.g. replace a defective valve) before
reactivating the protective circuit. Frequent triggering is always due to
power overload which, in certain circumstances, may also damage to
the instrument.
Malfunctioning/Repairing a defective instrument
The repair of a defective instrument
– irrespective of the warranty
period
– is only possible when the instrument is dismantled and
returned to us with a description of the error. Furthermore, please
inform us of the reagent type being used and the measured medium.
Before you return the instrument for repair work, remove the bottles
and ensure that the measuring chamber has been flushed out and is
empty.
The display shows 00.0
When the display shows 00.0, check if the dosing of the reagents is
correct (no over- or under-dosage). Check if the dosing pump is
dosing the reagents properly.
