The lock has three LEDs. They support an optical scheme with red, yellow and green. The indication scheme is described by the figures below:
Lock normal operation LED indication
Anm: When the lock mechanism is blocked (lock jammed) the knob must be turned to release
it.
Anm: The “Error in lock” indication is also shown instead of the POST flashes if the battery is
not accepted as new after a power-on-reset.