FTS 609
November 17, 1993
4
Figure 3
Check the figure for your UPS and continue with step 6.
6. Using the needle nose pliers, disconnect the negative (black) cable from the battery by
gently pulling the connector down, away from the battery terminal. (See the figure that
shows your UPS for terminal locations.)
Note:
The gray cable attached to the negative
cable is not connected.
Put a piece of black electrical tape over the end of the black cable so it cannot
accidentally touch another metal part.
7.
Now, turn the On/Off switch on the back of the Fortress on (to 1) for about four seconds
to discharge the capacitor. (The capacitor is discharged when the display and lights are
no longer lit.)
Then, turn the switch off again.
WARNING!
Make sure you turn the switch off before you continue. When you connect the new
batteries, there will be dangerous voltage inside the UPS if the On/Off switch is on.
This is true because the UPS battery supplies power even if the UPS is not connected
to its AC input source.
8. Use the needle nose pliers to remove the short jumper cable connecting the batteries
together (see the figure that shows your UPS).
9. Disconnect the positive (red) cable using the needle nose pliers (see your figure for the
cable’s location).
Put a piece of black electrical tape over the end of the red cable so it cannot
accidentally touch another metal part.
10.
If your UPS looks like
Figure 2
, follow the steps in the
first column
below.
If your UPS looks like
Figure 3
, follow the steps in the
second column
below.
Read the caution below before you remove the batteries from the UPS.
Caution: Make sure that the battery terminals do not touch the cabinet or any metal
part. Assume that the old batteries are fully charged, and use the same precautions you would
use when handling new batteries. Batteries contain lead. Dispose of the old batteries properly.
Do not dispose of a battery or batteries in a fire; the battery may explode. Do not open or
mutilate batteries. Released electrolyte is harmful to the skin and eyes. It may be toxic.
