Siemens SIRIUS 3RW55 - Page 181

Messages and diagnostics
8.4 Faults and remedial actions of the 3RW55 soft starter
SIRIUS 3RW55 soft starter
Manual, 08/2018, A5E35630887002A/RS-AB/002
181
Faults
Cause
Remedy
Bypass overload
In bypass operation the current was too high.
Fault resetting is only possible after cooling
down.
• Check motor.
• Check dimensioning of the soft
starter.
• Acknowledgment after cooling
down
Phase control failure
1. Error appears without motor start:
– Motor incorrectly connected
– Inside-delta circuit incorrectly realized
– Ground fault
2. Error appears while motor is starting:
– Kick start voltage too high
– Breakaway pulse incorrectly set
1. Check and correct the wiring.
2. Adjust parameters or extend pause
time.
Current measuring range
exceeded
• For sensors: The measured value
exceeds the measuring range.
• For actuators: The output value exceeds
a high limit value.
• Check the interaction between the
module and the sensor or actuator.
Invalid / inconsistent firmware
present
The firmware is incomplete and / or the
firmware expansions are incomplete or
incompatible.
• Run a complete firmware update.
• Check any occurring error
messages.
• Check to see whether or not the
firmware update was aborted.
Number of starting operations
exceeded
The maximum number of starting operations
in the monitoring period has been exceeded.
The next starting operation should take
place only after the interlock time has
expired.
Error rotating field The direction of rotation field is not correct. -
Above threshold P The active power of the motor has exceeded
a limit.
Check the application driven by the
motor.
Below threshold P The active power of the motor has fallen
below a limit.
Active power error limit shutoff Additional tripping in the event of an active
power fault limit overshoot or undershoot.
-
Test mode current flow Current is flowing in the motor feeder even
though it is in test mode or in the test
position. Possible causes:
• The main circuit is not interrupted in test
mode.
-
Overtemperature of electronic
components
The temperature in the components has
exceeded the maximum limit.
Check the ambient temperature or the
control cabinet cooling.
Actuator disconnection The module has disconnected the actuator.
An additional diagnostic message will be
displayed to provide you with more detailed
information about the cause.