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The door does not open and the green LED does not turn on when a
contactless smart card is presented:
1.
Verify that the door strike and the green LED are wired correctly.
2.
Verify that the card and reader are properly entered into the system.
The green LED does not turn on, but the door strike unlocks the door
when a valid contactless smart card is presented:
1.
Verify that the door DO is wired correctly. Refer to the appropriate
wiring diagram.
2.
Disconnect the wire from JP2 pin 3 (green LED) and connect JP2 pin 3
to JP2 pin 2 (ground). If the green LED is now on, the reader is good
and the connection to the reader is defective. If the green LED does
not turn on, replace the reader.
Green LED turns on but the door does not open: Verify correct door
strike wiring and operation. The reader is functioning properly.
Reader sounds a short triple beep every 30 seconds and the red LED
flashes slowly (every 2 seconds): The reader has lost communication
with the microcontroller.
1.
Check the reader-to-microcontroller wiring. Refer to the appropriate
installation drawing. Verify that the AUX DO is jumpered to the
reader data 1 on the microcontroller.
2.
Verify that the correct pull-up resistor is installed on the
microcontroller.
3.
Verify that the microcontroller has the correct firmware for a
supervised reader. Refer to the manual that came with your
microcontroller for instructions.
4.
Try the reader on a different reader input at the microcontroller. If
this corrects the problem, then the microcontroller is probably
causing the problem.
5.
Replace the reader with one you know is working correctly. If this
corrects the problem, then the reader is probably faulty and should
be replaced.
6.
If none of the above steps have identified the problem, there may be a
significant noise source present in the installation which is interfering
with the reader-to-microcontroller communications. If this is the case,
use shielded wire for reader-to-microcontroller connections.
24
Model 840/845 Contactless Smart Card Reader
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