3
Figure 2
7.
Disconnect the negative cable. (See Figure 2 for the cable’s location.)
NOTE:
Disconnect the gray cable
attached to the negative cable also.
Put a piece of electrical tape over the metal ends of the black and gray cables so they cannot accidentally
touch another metal part.
Bend the black and gray cables upwards; then, temporarily tape them to the cabinet near the receptacles.
8.
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 not longer lit.)
9.
Slide both batteries towards the back of the UPS until the jumper cable between the two batteries is outside
of the UPS cabinet. (See Figure 2 to find the jumper cable’s location.)
10.
Disconnect the jumper cable between the two batteries.
11.
The first battery should now be out of the cabinet.
CAUTION
Make sure that the 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.
12.
Remove and save the separator (thin cardboard or white foam) that is between the two batteries. Slide the
second battery towards the back of the UPS until the positive (red) cable is outside of the cabinet.
13.
Disconnect the positive (red) cable from the second battery. (See Figure 2 for cable locations.)
Read the caution below; then, lift out the old batteries.
