Adjustment and maintenance operations |
51
R.5
Changing the Internal Battery in the controller
Caution
This procedure requires knowledge of proper ESD protection; i.e. an earthed wristband must be used!
When the alarm ”Internal Battery” is on the screen of the control panel, the battery for backup of program memory and
real-time clock has become too weak. The battery is replaced as described below. A backup capacitor saves the memo-
ry and keeps the clock running for at least 10 minutes after the power supply is removed. Therefore, if the battery re-
placement takes less than 10 minutes, there will be no need to reload the program, and the clock will continue to run
normally.
The replacement battery must be of the type CR2032.
1 Remove all the cables from the Access controller. All
cables are in plugs that easily and fast can be pulled
up. Release the Access controller from the mounting
frame through pushing on one of the long sides of the
controller. This is shown on the illustration below.
2 Remove the white cover from the black bottom by
pressing on each of the six locking hooks at the two
long edges of the cover using a small screwdriver,
and at the same time pulling the cover outwards.
3 Use a small screwdriver to press this hook on the cov-
er away from the edge of the black bottom
4 Each of the six hooks must be released from the block
on the black bottom by a small screwdriver, and at
the same time pulling the cover outwards.
output |
