Q . Reader Interface show 'Communication Down'.
Q . Green & Yellow LED not blinking or either one of the LED always light ON.
Q . EM Lock always release.
Q . EM Lock always lock even after valid access or pressing push button.
Q . Reader fail to read / range drop whenever there is an exit reader nearby.
Q . Unable to login to controller, always shown 'Invalid Password'.
Q . Controller / Reader Interface always auto reset once in a while.
Q . System often down whenever there is lightning storm or blackout.
