Cause : Connection mode fault comes when the setting of connection mode selection switch (common bus regeneration mode or power regeneration mode (1 or 2)) does not match the actual wiring of the main circuit terminals, the protective function is activated to stop the operation of the multifunction regeneration converter.

1. Check that the setting of Pr.415 SW2 setting status is correct.
2. Check the wiring
3. Set the Pr.415 appropriately.