I n s t a l l a t i o n & P r o g r a m m i n g M a n u a l
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5. Remove the cover of the battery back up unit and proceed to install the batteries. Place the
batteries on their side with the terminals facing the side of the case, as shown in Figure 4-8.
6. Using the short red cable with two spade connectors, connect the positive terminal (+) of the
left-hand battery to the negative (-) terminal of the right hand battery.
7. Connect the spade connector on the red wire of the long lead to the remaining positive battery
terminal and the spade connector on the black wire to the negative battery terminal. The other
end of this lead with the 2-pin socket with red and black wires should be connected to plug J3
on the BBU.
8. Connect the 2-pin socket with the single wire to the matching 4-pin plug marked SK27 on the
main board. Ensure that the single wire is connected to pin 2 of the connector, as shown in
Figure 4-8.
9. Thread the external cable from the battery unit through the cable entry at the rear of the
telephone system case, where the 220-240 volt cable was removed.
10. Connect the 3-pin socket to the matching connector pins marked BBU (SK22) on the
telephone system main board.
11. Close the lid of the system and Battery unit and plug the battery unit into the 220-240 volt
mains outlet.
Note if a 25Hz ringer card is fitted, it must be removed completely when a BBU is connected.
The green led on the front case of the telephone system will light to indicate it is receiving power.
After the batteries are charged (approx. 4 to 5 hours) then the system will run without mains power
for between 1 and 3 hours depending on the usage of the system and the number and duration of
extensions ringing.
When the system is running on battery the internal red led only is lit and when the 220-240 volt
power is operating then both the red and green LED’s on the battery back up unit are lit.
To turn off the power feed to the telephone system while the system is running on battery it is
necessary to disconnect the batteries at connector J3.
N.B.
While the system is running on battery if, for some reason, the battery leads are
disconnected and then re-connected the system will not run unless the installation
technician shorts the two solder pads marked X1 and X2. This is also necessary if the unit
is started up using battery power only.
Important!
