7
Operational Malfunctions
Fault finding list for troubleshooting
After applying mains voltage LEDs
B
and
C
do not light up
Fault:
The mains voltage is not applied across the equipment.
Remedy:
Apply mains voltage. Check installation of the 9" slide-in unit.
Fault:
The internal fuse is defective.
Remedy:
Remove the 9" slide-in unit and replace the internal fuse.
Incorrect measuring current between electrode terminal 2 and NRS terminal 5 or A22 defective
Fault:
The level transmitter NRGT 26-S is defective.
Remedy:
Check level transmitter (see installation instructions NRGT 26-S).
Level switch does not work properly despite correct measuring current
Fault:
The level switch NRS 2-3 is defective.
Remedy:
Replace level switch.
Danger
The terminal strip of the NRS 2-3 is live during operation. This presents the danger of
electric shock.
Cut off power supply before inserting or removing the 9" slide-in unit and before carrying
out any installation or maintenance work.