Flowserve NRGS15-1 - Manual (Page 24)

24
Malfunctions / Troubleshooting
Fault finding list
Switchpoint "Pump OFF" exceeded - no function
Fault: Mains voltage is not applied.
Remedy: Switch on mains voltage. Connect level switch according to wiring diagram
(Fig. 5).
Fault: The electrical conductivity is too low.
Remedy: Set code switch to 0.5 µS/cm.
Fault: The earth connection to the vessel is interrupted.
Remedy: Clean seating surfaces (see Fig. 3) and insert metal joint ring Ø 33 x 39
DIN 7603 (made from s. s. 1.4301). Do not insulate the level switch with
hemp or PTFE tape!
Fault: Electronic circuit board defective.
Remedy: Replace electronic circuit board.
Level below switchpoint "Low level" - no function
Fault: The electrode tips have earth contact.
Remedy: Check and, if necessary, change position of installation.
Fault: If the equipment is installed inside the boiler: The vent hole in the protection
tube does not exist or is obstructed.
Remedy: Check installation of level switch. Make sure that the level in the protection
tube corresponds to the actual water level (see Examples of Installation).
Switchpoint has been reached - incorrect function
Fault: The switching function has not been assigned correctly. The electrode tips
have been cut to the wrong length.
Remedy: Assign the electrode tips correctly and change connections on the electronic
circuit board correspondingly.
Fault: The switching function does not correspond to the selected function. The
code switch has been set to the wrong value.
Remedy: Set code switch according to the selected function.
6
D
N
6