22
Operation, Alarm and Test
Level switch NRS 1-54: Indicators and adjustors
TEST button
MAX LED red/green.
Fig. 18
Pump LED red/green
LED “Power”
Fill control
Activity
Display
Function
Level below switchpoint
“Pump ON”
Pump LED illuminated green.
Pump output contact 17/18 closed, 16/18 open.
Level above switchpoint
“Pump OFF”
Pump LED is not illuminated.
Pump output contact 16/18 closed, 17/18 open.
Test MIN alarm
During operation:
Level below switchpoint
MAX water level, MAX LED
illuminated green.
Press and hold down button
“Test”.
MAX LED flashes red.
De-energizing delay is running.
MAX LED is illuminated red for
3 sec.
MAX output contact 21/23 closed, 22/23 open.
The test is finished. Release
button “Test”. Equipment
returns to operating mode.
Note: If you continue to hold down the Test button, a new test is started. You can
abort the test any moment by releasing the Test button.
Discharge control
Switchpoint “Water level -
pump ON” exceeded
Pump LED illuminated green.
Pump output contact 17/18 closed, 16/18 open.
Level below switchpoint
“Water level - pump OFF”
Pump LED is not illuminated.
Pump output contact 16/18 closed, 17/18 open.
MAX alarm
Water level above MAX
switchpoint.
MAX LED flashes red.
De-energizing delay is running.
MAX LED illuminated red
Time delay has elapsed. MAX output contact
21/23 closed, 22/23 open.
