Flowserve NRGS 11-2 - Manual (Page 18)

8
Troubleshooting
Fault finding list
Level has exceeded switchpoint “High Water” – 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 been triggered.
Remedy: In case of defective thermal fuse the mains voltage has not been connected to terminal L:
Replace defective thermal fuse (Order No. 05629)
The ambient temperature must not exceed 70 °C.
Fault: The electric conductivity is too low.
Remedy: Set code switch 4 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 .430) 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. 39556 (5/230 V a.c.), 39636 (24 V a.c.).
Level has fallen below switchpoint “Low Water” – no function
Fault: The electrode tips 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 extra) are closed.
Remedy: Open isolating valves.
Switchpoint has been reached – incorrect function
Fault: The switching function has not been correctly allocated. Electrode tips have been cut to
the wrong size.
Remedy: Identify electrode supply wire and reconnect accordingly.
If faults occour that are not listed above, please contact our subsidiary or agency in your country.