Flowserve NRS 1-50 For ONE Electrode - Manual (Page 20)

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Operation
Activity Indication Function
Level electrode submerged. Green LED
for level electrode  is illuminated
Output contacts are closed.
Signal outputs  /  open.
Alarm
Level electrode exposed,
level below low water level
(LW).
Red LED
for level electrode  is flashing
De-energizing delay is running.
Signal outputs  /  are closed instantaneously.
Red LED
for level electrode  is illuminated
Delay time has elapsed, output contacts open.
Signal outputs  /  are closed.
Test channel 1 and 2
During operation:
Press and hold down key
 until the end of the test,
level switch must function
as if there were an alarm.
Red LED
for level electrode  is flashing
Alarm simulated in channel  or .
De-energizing delay is running.
Signal outputs  /  are closed instantaneously.
Red LED
for level electrode  is illuminated
Delay time has elapsed, output contacts open.
Signal outputs  /  are closed.
Test finished.
Operation, Alarm and Test
Indicators and adjustors
Fig. 12
Attention
Before carrying out the fault diagnosis please check:
Mains supply:
Is the level switch supplied with the mains voltage specified on the name plate?
Wiring:
Is the wiring in accordance with the wiring diagram and the relevant schematic
representation of arrangement?
LED alarm  /
operating mode
Level electrode 1
Test & diagnosis
button
LED alarm  /
operating mode
Test & diagnosis
button
Diagnosis LED
Troubleshooting
Indication, diagnosis and remedy