Operation, System malfunctions – Flowserve NRS 2-40 User Manual
Page 20
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Hold down button .
LED 4 goes out.
A low-level alarm is simulated for
switchpoint 4.
Press button briefly.
The test mode is active for 5 seconds.
Hold down button .
LED 1 goes out.
A high-level alarm is simulated for
switchpoint 1.
Relay test high/low level alarm (
MIN
/
MAX
)
Operation
– continued –
System Malfunctions
There are four types of system malfunctions that might occur in the level electrode and
the level switch:
■
Max. admissible temperature in electrode terminal box exceeded
■
No or faulty communication between switching controller and electrode
■
Fault in CAN bus
■
Failure of 24 V power supply unit built in level controller NRS 2-40
The terminal strip of the NRS 2-40 is live during operation.
This presents the danger of electric shock.
Cut off power supply before mounting or removing the equipment.
Danger
LEDs illuminated
briefly
LED 4 goes out
LED 1 goes out