Why does the CM or CL lock get twelve red flashes before unlocking?

Resolution: The CM  or CL lock will flash twelve red LED flashes before unlocking, to act as an annoying alert of the batteries becoming too low to function correctly.

LOW BATTERY INDICATIONS:
- Battery powered lock products have built-in low battery indications.
- A lock with low batteries will act differently than a normally functioning lock, allowing the appropriate support personnel to be notified of the locks differing behavior.
- Changing batteries does not affect any programmed data.
- Battery voltage can be checked with a meter on the metal iButton ports (6.2 volts=full new battery power, 4.5 volts=low power, replace batteries)

There are two phases of low battery indications:
A.  When a valid credential is used on a lock with weak batteries (4.5v or less), the red LED will flash twelve times before the green LED flashes and the lock is released. 
This is an annoyance feature and an indication to replace the batteries at this time.  The lock will operate in this manner for about 500 cycles.

B. After approximately 500 cycles of the lock operating as described in Phase A, when a valid credential is used, the red LED will flash twelve times and the lock will not release - the lock automatically goes into a Freeze / Lockout Mode. 
A Freeze / Lockout credential must be used to reset the lock to an accessible state and then a Normal credential must be used to gain access.  The lock will operate in this dual credential manner for approximately 200 cycles, until the batteries are too weak for this process to function. 
Then the mechanical override key must be used to gain access (if the lock is so equipped).

Low batteries are recommended to be replaced by new matching Alkaline AA batteries as soon as the first reports of Phase A low battery indication are received.
Note, after changing low batteries, it will take a few cycles of the lock before it registers the new batteries and stops flashing the Phase A low battery indication.