Code

Name

Causes

Possible Solutions

boL

BrakingTransistor Overload Fault

The duty cycle of the braking transistor is high (the regeneration power or repetition frequency is high).

  • Install a braking unit (CDBR-series).

  • Install a regenerative converter.

  • Increase the deceleration time.

You enabled the protective function for the braking transistor when you have a regenerative converter.

Set L8-55 = 0 [Internal DB TransistorProtection = Disable].

The braking transistor in the drive is broken.

Replace the entire drive.
Note:

Do a Fault Reset to clear the fault.