Flowserve NRS 1-50 For TWO Electrodes - Manual (Page 20)

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Operation
Activity Indication Function
Level electrode(s) submerged.
Green LEDs for level
electrode  /  illuminated.
Output contacts are closed.
Signal outputs  /  open.
Alarm
Level electrode(s) exposed,
level below low water level
(LW).
Red LEDs
for level electrode  /  are
flashing.
De-energizing delay is running.
Signal outputs  /  are closed instantaneously.
Red LEDs
for level electrode  / 
illuminated.
Delay time has elapsed, output contacts open.
Signal outputs  /  are closed.
Test channel 1 and 2
During operation:
Press key  or  and hold it
down until the end of the test,
level switch must react as if
there was an alarm.
Red LEDs
for level electrode  /  are
flashing.
Alarm simulated in channel  or .
De-energizing delay is running.
Signal outputs  /  are closed instantaneously.
Red LEDs
for level electrode  / 
illuminated.
Delay time has elapsed, output contacts open.
Signal outputs  /  are closed.
Test finished.
Operation, Alarm and Test
Indicators and adjustors
Fig. 14
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?
Configuration: Are the code switch settings
4 and 5 correct for the number of level
electrodes used?
LED alarm  /
operating mode
Level electrode 1
Test & diagnosis
button
LED alarm  /
operating mode
Level electrode 2
Test & diagnosis
button
Diagnosis LED
Troubleshooting
Indication, diagnosis and remedy