Siemens SIRIUS 3RW40, Manual

Page: 49 / 212

Functions
5.7 Diagnostics and fault signals
SIRIUS 3RW30 / 3RW40
Manual, 01/2010, 535 1995-02 DS01
49
Missing load voltage, phase failure
/ missing load: Cause 1: Phase L1 / L2 / L3 is missing or
fails / collapses when the motor is
operating.
Tripped as a result of a dip in the
permissible rated operational voltage >
15 % for > 100 ms during the startup
process or > 200 ms in bypass mode. Connect L1 / L2 / L3 or correct the voltage
dip.
Cause 2: The motor that is connected is
too small and the fault occurs as soon as
it is switched to bypass mode. Set the correct rated operational current
for the connected motor or set it to the
minimum value (if the motor current is
less than 10 % of the set I
e
, the motor
cannot be operated with this starter).
Cause 3: Motor phase T1 / T2 / T3 is not
connected. Connect the motor properly (e.g. jumpers
in the motor terminal box, repair switch
closed etc.)
Device fault Soft starter defective. Contact your SIEMENS partner or
Technical Assistance.
Fault Cause Remedy