Functions
5.7 Diagnostics and fault signals
SIRIUS 3RW30 / 3RW40
Manual, 01/2010, 535 1995-02 DS01
45
Fault
Cause
Remedy
Impermissible electronics supply
voltage
The control supply voltage does not
correspond to the soft starter's rated
voltage.
Check the control supply voltage; an
incorrect control supply voltage could be
caused by a power failure or a voltage
dip.
Bypass overload
A current > 3.5 x I
e
of the soft starter
occurs for > 60 ms in bypass mode (e.g.
because the motor is blocked).
Check the motor and load, and check the
soft starter's dimensions.
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.
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.
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.
Summary of Contents for SIRIUS 3RW40
Page 1: ...Soft starters SIRIUS 3RW30 3RW40 Manual 01 2010 Industrial Controls Answers for industry ...
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Page 68: ...Connecting 9 1 Electrical connection SIRIUS 3RW30 3RW40 68 Manual 01 2010 535 1995 02 DS01 ...
Page 210: ...Index SIRIUS 3RW30 3RW40 210 Manual 01 2010 535 1995 02 DS01 ...
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