Programmable see : 31.18 Residual current detection type

The drive has detected an unbalance typically due to a residual
current in the motor or the motor cables. Sum of IL1, IL2, IL3 ≠ zero.
See also A2B3.
Check:
− The settings of 31.17 Residual current detection source, 31.18
Residual current detection type, 31.19 Residual current
detection level and 31.20 Residual current detection delay.
− The sum current transformer, if necessary change transformer
or connected drive hardware.
− The insulation resistances of motor and motor cables.
Disconnect the mains, verify safe isolation from supply in
armature and field circuits and make insulation tests for the
complete installation.
− The auxiliary code (format XXXY YYZZ).
Y YY identifies the power unit. In case of a hardparallel
configuration.