Maintenance CK721-A Installation and Operation
5-2 24-10349-8 Rev. B
This document contains confidential and proprietary information of Johnson Controls, Inc.
© 2012 Johnson Controls, Inc.
TESTING PROCEDURE
 Check for proper operation of the CK721-A as follows:
1. Verify POWER LED on the CK721-A.
2. Verify that the FAULT LED on the CK721-A is not on.
3. Verify the RS485B LED is flashin
g to show activity on the bus.
4. Present a valid c
ard to a reader, and then verify that access is granted (green
lamp lights).
5. Present an inv
alid card to a reader, and then verify that access is denied (red
lamp lights).
Check Backup Battery Operation
 If the optional backup battery is installed:
1. Disable primary AC input voltage to th
e enclosure.
2. Verify that the CK721-A continues to operate.
3. Reapply primary AC voltage to the enclosure.
Lithium Battery Replacement
 To replace the lithium battery:
1. Ensure that AC power is supplied to the panel.
2. With a narrow blade (1/8 in. blade) carefully pry up the battery until a portion
of th
e battery is out of the plastic holder.
3. With your free hand gently move the battery out of the holder while keeping
the battery pried up.
4. Dispose of the old battery according to lo
cal requirements.
5. Insert the new battery into holder.
IMPORTANT
The lithium battery is polarized. Ensure the side marked ‘+’ faces out or
towards you.
CAUTION: Risk of Explosion.
Replace the battery with a lithium battery of the same type and voltage
rating. Dispose of the used battery in accordance with local, national, and
regional regulations. Failure to replace the battery with one of the same
type and voltage rating may result in an explosion causing personal injury
and property damage.
To Next Page
Loading...
Need help?
General
