Flowserve NRGS 16-4 - Manual (Page 16)

16
Malfunctions
Fault finding list for troubleshooting
Level electrode immersed - no function
Fault: Mains voltage is not applied to the level switch.
Remedy: Switch on mains voltage. Connect electrode according to wiring diagram.
Fault: The electrode body does not have earth connection to the boiler.
Remedy: Clean seating surfaces and screw in the equipment together with the supplied joint ring
17x 21, form D to DIN 7603 (made from 1.4301), bright annealed. Do not insulate level elec-
trode with hemp or PTFE tape!
Level electrode exposed - no function
Fault: The internal insulation of the electrode rod is damaged.
Remedy: Replace level electrode.
Fault: The electrode tip has earth contact.
Remedy: Check and, if necessary, change position of installation.
Fault: The vent hole in the protection tube does not exist, is obstructed or flooded.
Remedy: Check protection tube and, if necessary, provide vent hole.
For more information see the Installation Instructions of the level switch.
If faults occur that are not listed above or cannot be corrected, please contact our service centre or
authorized agency in your country.