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Flowserve NRGS 11-1 Manual de usuario Pagina 16

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16
Annex
Warning
The terminal strip of the NRGS 11-1, NRGS 16-1, NRGS 16-1 S is live
during operation.
This presents the danger of electric shock.
Cut off power supply before fixing or removing the housing cover.
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 : Replace defective thermal fuse
(stock code 051 629).
The ambient temperature must not exceed 70 °C.
Fault:
The electric conductivity is too low.
Remedy:
Set code 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 x39 to DIN 7603.
Do not insulate compact system with hemp or PTFE tape!
Fault:
Electronic board is defective.
Remedy:
Replace board (stock code 391 422).
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) 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 occur that are not listed above or cannot be corrected, please contact our
service centre or authorized agency in your country.
J
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