Flowserve NRGS 16-2 - Manual (Page 15)

15
Annex
Warning
The terminal strip of the NRGS 16-2 is live during operation.
This presents the danger of electric shock.
Cut off power supply before removing or replacing housing cover.
Fault finding list
Switchpoint “Pump ON” has been exceeded – no function
Fault:
Mains voltage has not been applied.
Remedy: Apply mains voltage. Wire equipment according to the wiring diagram.
Fault: The thermal fuse has failed.
Remedy: In case of defective thermal fuse the mains voltage has not been
connected to terminal : Replace defective thermal fuse
(Order No. 051629).
The ambient temperature must not exceed 70 °C.
Switchpoint “Pump OFF” has been exceeded – no function
Fault:
The electric conductivity is too low.
Remedy: Switch DIP switch to
≥
0.5 µS/cm.
Fault: The electrode housing does not have earth connection to the boiler.
Remedy: Clean seating surfaces and insert metal joint ring (of stainless steel 1.4301)
33 x 39 to DIN 7603.
Do not insulate compact system with hemp or PTFE tape!
Fault: Electronic board is defective.
Remedy: Replace board (Order No. 391423).
Level has fallen below switchpoint “Low water” – no function
Fault: The electrode rods have earth contact.
Remedy: Change installation position.
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.
Fault: The isolating valves of the external measuring pot (optional) are closed.
Remedy: Open isolating valves.
Switchpoint has been reached – incorrect function
Fault: The switching function has not been correctly allocated. Electrode rods
have been cut to the wrong size.
Remedy: Identify electrode supply wire and reconnect accordingly.
N N N N N
J J J J J