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Please note that if you change the DIP switch setting, the
output voltage range that your UPS provides to your equipment
is wider as well. To change the DIP switch setting, follow
these steps:
1. Find the DIP switches on the back of the UPS. (See the
drawings below.) Then, find DIP switch 3.
2. Use a nonmetal object such as a toothpick to move DIP
switch 3 from one side to the other; if the UPS is on, it will
beep. Make sure you do not accidentally change the posi-
tion of another DIP switch.
LI 1020 and 1420
LI 520 and 720
Sensitivity to “Glitches” in Input Power
The UPS is designed to protect your equipment from problems or “glitches” in input power.
If the glitches are very severe, the UPS may need to run on battery once in a while to protect
your equipment.
If the UPS must run on battery power often because of problems in your input power, you
may want to lower the UPS’ sensitivity to these problems to save battery power. To do this,
follow these steps:
1. Find the DIP switches on the back of the UPS. Then, find DIP
switch 2. (See the drawings above.)
2. Use a nonmetal object such as a toothpick to move DIP switch 2
from one side to the other; if the UPS is on, it will beep. Make
sure you do not accidentally change the
position of another DIP switch.
DIP Switches
DIP Switches
4
3
2
1
4
3
2
1
Normal
Range
Wider
Range
