Siemens SENTRON Manual page 180

Service and maintenance
10.1 Fault rectification
Fault state
The "Ready" LED flashes.
The "Auto" LED flashes.
The warning LED on the motor operator lights up.
The fault indicator on the electronic module lights up
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Procedure for fault rectification
The "Ready" LED flashes if the saved settings are not iden-
tical to those displayed on the electronic module. Possible
reasons for this
The settings are not saved.
•
The potentiometer settings have been changed without
•
saving.
To correct this fault, either reset the 3KC8 to the changed
settings or save the new settings. For this purpose, switch
the transfer switching equipment to the "Manual" position
and briefly press the "OK-Prog" pushbutton. The transfer
switching equipment can then be switched back to the "Au-
to" position.
The "Auto" LED lights up green continuously when the 3KC8
transfer switching equipment is in automatic mode. The
"Auto" LED flashes green when the timer is running.
In the case of the 3KC8 transfer switching equipment, the
warning LED on the motor operator lights up when the
transfer switching equipment is in manual operation. If the
LED lights up even though the transfer switching equipment
is in automatic mode, an internal fault is active. To reset the
state, switch the transfer switching equipment from automat-
ic mode to manual operation and back again to automatic
mode. Alternatively, the transfer switching equipment can be
reset on the hardware by switching off the power supply to
the transfer switching equipment for more than 3 minutes. If
the LED continues to light up, you must locate and correct
the fault:
The warning LED lights up if contacts 313 (priority com-
•
mand for the OFF position) and 317 are closed. This is a
normal state.
Check whether the power supply for the transfer switch-
•
ing equipment is within the limits.
If the LED lights up for other reasons, contact Technical
•
Support (http://www.siemens.com/lowvoltage/technical-
support).
To reset the state, switch the transfer switching equipment
from automatic mode to manual operation. Then switch
back again to automatic mode.
If the fault persists, contact Technical Support
(http://www.siemens.com/lowvoltage/technical-support).
Manual, 08/2017, L1V30368969104A-02