18
Attention
Before carrying out the fault diagnosis please check:
Supply voltage:
Is the level electrode supplied with the voltage specified on the name plate?
Wiring:
Is the wiring in accordance with the wiring diagram?
Troubleshooting
Indication, diagnosis and remedy
Malfunctions
Equipment does not work accurately
Error
Remedy
The level electrode was installed without a protection
tube. The protection tube is required because it serves
as reference electrode.
Install a protection tube.
The vent hole in the protection tube does not exist,
is obstructed or flooded.
Check protection tube and, if necessary, provide vent hole.
The isolating valves of the external level pot (optional)
are closed.
Open isolating valve.
The desired lower measuring point is outside the
measuring range of the level electrode.
The level electrode is too short.
Install a sufficiently long level electrode.
The adjustment of the measuring range is wrong.
Correct code switch
h
settings.
See
Basic Settings
The electrode rod is covered with dirt deposits.
Remove level electrode and clean the electrode tip with a
wet cloth.
The level electrode is submerged and
UM = 0 V or > 7 V DC.
Replace level electrode.
Equipment fails to work
Error
Remedy
Power failure.
Switch on supply voltage. Check all electrical connections.
The earth connection to the vessel is interrupted.
Clean seating surfaces and screw in the level electrode
together with the joint ring 27 x 32, form D, DIN 7603
(made from 2.4068), bright annealed. Do
not
insulate the
electrode with hemp or PTFE tape!
