It looks like this has not updated since posted, correct?
I would remove the device, factory reset, then re-enroll into the panel.
Factory reset instructions for the S40-T:
- Remove the battery door, tap the tamper switch three times in a row, press and hold the tamper switch for 10 seconds until the LED starts flashing. Then, release to reset to default.
- After the tamper switch is released, the LED will blink quickly and then turn solid for 3 seconds indicating that the device is resetting.