Siemens SIRIUS 3RW55 - 8.3 Warnings and Remedial Measures

Messages and diagnostics
8.3 Warnings and remedial measures of the 3RW55 soft starter
SIRIUS 3RW55 soft starter
Manual, 08/2018, A5E35630887002A/RS-AB/002
177
8.3
Warnings and remedial measures of the 3RW55 soft starter
Warning
Cause
Remedy
Generator operation The motor is in ramp-down mode. The
motor connection cables may be
energized.
Parameterize the ramp-down mode to
minimize or avoid the generator
operation.
Connection break in manual mode Connection to operator device (e.g.
3RW5 HMI) is interrupted.
• Check the communication between
the 3RW5 HMI and the device.
• Check the connection between PC
and the local device interface.
Temperature sensor overload The temperature of the motor is too high.
•
Check the motor and the application
that is driven by the motor.
• After triggering, the motor can only
be switched on again if the
temperature has reached the
release position of the temperature
sensor.
Temperature sensor wire break A wire break has occurred in the sensor
line of the temperature sensor.
Check the sensor line and the
temperature sensor.
Temperature sensor short-circuit A short-circuit has occurred in the sensor
line of the temperature sensor.
Module slot wrong or configuration
faulty
Real and configured slot of module is
different.
Ensure consistency between plugged
and configured module position or or
possibly the referenced module has a
wiring fault.
Switching element overload Switching element (switch contact, power
semiconductors) too hot.
• Check the ambient conditions
associated with cooling. You may
want to consider lowering the
operating characteristics.
• Check the number of switching
operations.
Time reserve before tripping
underrun
The time to overload trip of the thermal
motor model is shorter than the
configured time for the tripping reserve.
• Let the motor cool down.
• For heavy starting and settings for
tripping CLASS 20, deactivate this
monitoring.
Therm. motor model overload
• The motor feeder is overloaded.
• The motor temperature has exceeded
a limit.
• Check the motor and the
applications driven by the motor.
• You can switch on the motor again
after the cooling-off period has
expired or after deleting the thermal
motor model.
Above threshold I
The current has exceeded a limit.
Check the application driven by the
motor.
Below threshold I
The current has undershot a limit.