Operation malfunctions, Operation – Flowserve NRG 111-11 User Manual
Page 18
18
Operation Malfunctions
Fault finding list for troubleshooting
Level electrode immersed – low level alarm
Fault:
Mains voltage not applied.
Remedy:
Apply 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 insert metal joint ring (of stainless steel 1.4301)
D 33 x 39 to DIN 7603.
Do not insulate level electrode with hemp or PTFE tape!
Fault:
The internal insulation of the electrode rod is damaged.
Remedy:
Replace level electrode.
Level below “low level limit” – no function
Fault:
The electrode rods have earth contact.
Remedy:
Check and change installation position if necessary.
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.
Operation
Application in conjunction with level switch NRS 1-7 in steam and pressurised hot water plants in
accordance with TRD 401, TRD 602, TRD 604, EN 12952, EN 12953 or according to other national
regulations.
Water level limiter
Note
■
To analyse and eliminate malfunctions use “Fault finding list for troubleshooting” on
page 18!
If faults occur that are not listed above or cannot be corrected, please contact our service centre or
authorized agency in your country.