Issue
When a valid card is presented at a reader connected to an AC1 module, the reader’s LED will blink green for a fraction of a second then go solid red.
Environment
AC1
AC1Plus
CX9702
ACX5740/20
ACX701
ACX781
Cause
Incorrect wiring of card reader LED line.
Resolution
If card reader has two led lines make sure the right one is wired to the AC1/Controller.
Typically when the undesired LED behavior is observed, swapping the LED line takes care of the problem.