Centurion R3 User Manual page 14

To release the manual override, proceed as follows:
Unlock and remove the operator cover.
Swing open the manual release dust cover.
Lift the controller housing fitted to a MASTER motor.
This is not necessary when releasing a SLAVE motor.
Insert the allen key provided into the manual release
mechanism and rotate it clockwise to release the
gearbox (approximately 12 turns)
Page 14