Siemens SENTRON 3WL10 Series Manual page 168

Operation
6.2 Alarms
Warning displays
Warning display 1
On
166
Warning display 2
Flashing fast
(2 Hz)
Alarm / status
Pre-alarm L, power flow is
greater than 90 % of the
setting value I
r
Temperature alarm
Contact erosion > 80 %
Line frequency outside the
tolerance
I warning
n_pal
A warning is pending
Measure / comment
Lower the ambient temperature
or reduce the continuous
operating current.
Prompt maintenance and
replacement of the circuit breaker
required
Check possible interference fac-
tors.
Pre-alarm threshold has been
exceeded.
Press the control key "i Test" to
display a list of warning
messages on the display.
You can read what action to take
in response to which alarm in
the table "LED displays of the
protection releases" (ETUs of
the 3-series).
Air circuit breaker 3WL10
Manual, 11/2017, L1V30499596002-01