Siemens SIRIUS 3RW30 Manual page 49

Fault
Missing load voltage, phase failure
/ missing load:
Device fault
SIRIUS 3RW30 / 3RW40
Manual, 01/2010, 535 1995-02 DS01
Cause
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.
Cause 2: The motor that is connected is
too small and the fault occurs as soon as
it is switched to bypass mode.
Cause 3: Motor phase T1 / T2 / T3 is not
connected.
Soft starter defective.
5.7 Diagnostics and fault signals
Remedy
Connect L1 / L2 / L3 or correct the voltage
dip.
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
cannot be operated with this starter).
Connect the motor properly (e.g. jumpers
in the motor terminal box, repair switch
closed etc.)
Contact your SIEMENS partner or
Technical Assistance.
Functions
, the motor
49