DoorKing 9310 - Manual (Page 43)

4.3.3 Fail-Secure Manual Operation
The FAIL-SECURE option locks the gate when primary (AC) power is removed and requires a keyed
release to place the gate in manual operation. The FAIL-SECURE option is typically used in CLASS
III and CLASS IV applications.
Be sure that primary (AC) and backup (DC) power is removed or shut-off prior to placing the gate
operator in manual operation.
Insert the manual release key into the keyed release on the side of the gate operator, and turn it
clockwise 1/4 turn. The gate can now be manually operated.
1/4 TURN
9310-065-H-8-08 Page 43