Siemens SIRIUS 3RW30 Manual page 45

Fault
Impermissible electronics supply
voltage
Bypass overload
Missing load voltage, phase failure
/ missing load
Device fault
SIRIUS 3RW30 / 3RW40
Manual, 01/2010, 535 1995-02 DS01
Cause
The control supply voltage does not
correspond to the soft starter's rated
voltage.
A current > 3.5 x I of the soft starter
e
occurs for > 60 ms in bypass mode (e.g.
because the motor is blocked).
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
Check the control supply voltage; an
incorrect control supply voltage could be
caused by a power failure or a voltage
dip.
Check the motor and load, and check the
soft starter's dimensions.
Connect L1 / L2 / L3 or correct the voltage
dip.
If less than 10 % of the soft starter's rated
current is flowing, the motor cannot be
operated with soft starter. Use another
soft 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
45