Siemens SIRIUS 3RW55 Equipment Manual page 255

Error
Bypass protective shutoff
Switching element L1 failed
Switching element L2 failed
Switching element L3 failed
Phase control failure
Current measuring range exceeded
Device error
FW update faulty
Switching frequency time not kept
Main power rotation faulty
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006
9.4 Errors and remedial actions of the 3RW55 and 3RW55 Failsafe soft starters
Cause
In bypass operation the current was
too high. Fault resetting is only possi‐
ble after cooling down.
Switching element defective
1. Error appears without motor
start:
– Motor incorrectly connected
– Inside-delta circuit incorrectly
realized
– Ground fault
2. Error appears while motor is start‐
ing:
– Kick start voltage too high
– Breakaway pulse incorrectly
set
• With sensors: The measured val‐
ue has exceeded the range limits.
• With actuators: The output value
has exceeded an upper limit.
Unrecoverable error detected after
internal diagnostics (self-test, contac‐
tor contacts, switching element,
etc.).
The firmware is incomplete and / or
the firmware expansions are incom‐
plete or incompatible.
The maximum number of starting op‐
erations in the monitoring period has
been exceeded.
The direction of rotation field is not
correct.
Messages and diagnostics
Remedy
• Check motor.
• Check dimensioning of the soft starter.
• Acknowledgment after cooling down. The
acknowledgment depends on the "Re‐
sponse to overload switching element" pa‐
rameter that has been set.
Switch off the power supply (control supply
voltage) for at least 5 seconds and switch it on
again. If the fault is still present proceed as fol‐
lows:
• Please contact Technical Support (Support
Request (Page 11)).
• Check the switching elements for L1, L2,
and L3 and replace any that are defective.
1. Check and correct the wiring.
2. Adjust parameters or extend pause time.
Check the interaction between the module and
the sensor or actuator.
Switch off the power supply (control supply
voltage) for at least 5 seconds and switch it on
again. If the device error is still present proceed
as follows:
• Please contact Technical Support (Support
Request (Page 11)).
• Replace the device.
• Run a complete firmware update.
• Check any occurring error messages.
• Check to see whether or not the firmware
update was aborted.
The next starting operation should take place
only after the interlock time has expired.
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