• When using the drive in common DC bus applications and the internal braking chopper is not installed.
Enabling L8-55 under such conditions can incorrectly trigger a braking transistor fault (rF).
Setting 1: Enabled
Enable L8-55 when connecting a braking resistor or a braking resistor unit to the drive built-in braking transistor.
5.8 L: Protection Functions
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YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual