User`s guide

DE5450U 19
9. MAINTENANCE
9.1 Replacing the Backup Battery
The PowerMax operates from the regular electrical supply
of the protected site, but incorporates an internal 9-Volt
battery that keeps it working during power failures. It is
extremely important to maintain this battery in good
condition, namely to replace it immediately upon getting
the following trouble message when reviewing system
troubles (see Para. 5.2B):
CPU LOW BATTERY
Replacing the battery is a relatively simple process, so you
do not have to bother your installer. Proceed as follows:
A. Prepare 6 AA-size alkaline battery cells (option 1) or 6
size AA, 650 mA/h Nickel-Cadmium cells (option 2) -
purchased in any hardware or electrical supply store.
B. Make sure that the keypad cover is open.
C. Insert a wide bladed screwdriver into the slot shown in
Figure 9, and turn the handle slightly to force the right
edge of the left-hand cover up. This should dislodge the
two catches and free the right edge of the cover.
Warning! Do not try to dislodge the left side of the
cover first! This will break the angled legs at the left.
Figure 9. Prying the Cover Loose
D. Swing the cover up as shown in Figure 10, then pull
free the angled legs at the left and put the cover away.
The inner lid will now be in full view (see Figure 11).
Figure 10. Removing the Left Hand Cover
Figure 11. Battery Compartment Lid
E. Remove the screw that secures the battery compartment
lid (Fig. 11), swing the lid up and pull it away. You have
thus gained access to the battery holder (see Fig. 12).
ATTENTION! Removal of the lid will start a “tamper”
alarm - the trouble indicator will light and both
“memory” and “trouble” will flash in the display window.
If you interrogate the system at this stage by clicking
the <OK> button, “CPU TAMPER ALARM” and “CPU
TAMPER OPEN” will be displayed, in addition to “CPU
LOW BATTERY”.
Figure 12. Battery Compartment and Battery Holder
F. If a battery pack is used (optional), replace it with the
new Visonic 7.2 V battery pack (if a non-Visonic battery
pack is used, its battery snap should have proper
polarity). If 6 batteries are used, pull the battery holder
out and replace all the 6 battery cells - 3 at the top and 3
at the bottom of the battery holder.
Make sure that the flat (negative) end of each cell is
pressed against a circular spring and the capped
(positive) end of each cell is pressed against a flat
contact.
CAUTION! If you replace rechargeable cells
with alkaline (dry) cells or vice versa, mount
the battery-type selector in the correct
position (CHRG for rechargeable cells and
DRY for alkaline cells - see Figure 13).