User Manual
Back-UPS Pro BX850/1000/1350/1500M6
Alarms and System Errors
Audible Indicators
Status Icons
Replace Battery: The battery is nearing the end of its useful life. Replace the 
battery as early as possible.
On Battery: The Back-UPS is supplying battery backup power to the 
connected equipment, it will beep four times every 30 seconds.
Four Beeps Every 30 Seconds
Back-UPS is running on battery. You should consider saving 
any work in progress.
Continuous Beeping 
Low battery condition and battery run-time is very low. 
Promptly save any work in progress, exit all open 
applications, and shut down the operating system.
Continuous tone Battery Backup outputs are overloaded. 
Chirps every 2 Seconds with the Load 
Capacity Bar flashing
Battery is disconnected. 
Continuous chirping with the Load 
Capacity Bar and Replace Battery icon 
alternately flashing
Battery did not pass the automatic diagnostic test and should 
be replaced as early as possible. Pressing the 
MUTE button 
pauses the chirping.
If these icons are 
illuminated... This may be the problem.
The Back-UPS is operating on AC power, but is overloaded. Disconnect one 
of the items connected to the Back-UPS. If the Overload icon stops flashing, 
the Back-UPS is no longer overloaded and will continue to operate 
normally.
The Back-UPS is operating on battery power, but is overloaded. Disconnect 
one of the items connected to the Back-UPS. If the Overload icon stops 
flashing, the Back-UPS is no longer overloaded and will continue to operate 
normally.
The Back-UPS is operating on AC power, but the battery is not functioning 
properly. Contact Schneider Electric IT (SEIT) Customer Service to order a 
replacement battery. See “Replacement Battery” on page 9.
The Back-UPS is operating on battery power and the battery power is 
getting low. Shut down all connected equipment to avoid losing an unsaved 
data. When possible, connect the Back-UPS to AC power to recharge the 
battery.










