Siemens 3RW44 - Page 142

Diagnostics and messages
8.1 Diagnostics and messages
3RW44 soft starters
142 Manual, 03/2017, NEB535219502000/RS-AB/008
Message
①
②
③
Cause/solution
Phase failure L1 x
Option 1:
Phase L1 is missing or fails or drops while the motor is
running.
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.
Remedy:
Connect L1 or rectify the voltage dip.
Option 2:
The motor that is connected is too small and the fault occurs
as soon as it is switched to bypass mode.
Remedy:
Set the correct rated operational current for the connected
motor or set it to the minimum value (if the motor current is less than
10 % of the set I
e
, the motor cannot be operated with this starter).
Option 3
: Starter used in IT system with ground-fault monitoring:
3RW44, product version < *E06* and the PROFIBUS DP
communication module must not be used in this network configuration.
Remedy:
Replace starter with 3RW44, product version ≥ *E07*. Here,
use in combination with the PROFIBUS DP communication module is
admissible. However, the phase voltage values (UL-N) and phase-to-
phase voltage values (UL-L) may be displayed incorrectly on the
measured value display of the 3RW44.
Phase failure L2 x
Option 1:
Phase L2 is missing or fails or drops while the motor is
running.
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.
Remedy:
Connect L2 or rectify the voltage dip.
Option 2:
A motor that is not powerful enough is connected and the
fault occurs as soon as a switchover is made to bypass mode.
Remedy:
Set the correct rated operational current for the connected
motor or set it to the minimum value (if the motor current is less than
10 % of the set Ie, the motor cannot be operated with this starter).
Option 3
: Starter used in IT system with ground-fault monitoring
3RW44, product version < *E06* and the PROFIBUS DP
communication module must not be used in this network configuration.
Remedy:
Replace starter with 3RW44, product version ≥ *E07*. Here,
use in combination with the PROFIBUS DP communication module is
admissible. However, the phase voltage values (UL-N) and phase-to-
phase voltage values (UL-L) may be displayed incorrectly on the
measured value display of the 3RW44.