User Manual
Back-UPS Pro BX850/1000/1350/1500M8
Troubleshooting
Sensitivity 6Off
The Load Capacity icon will blink, indicating that the 
Back-UPS is in programming mode. Use the P
OWER 
button to scroll through Low, Medium, and High, stop 
at selected sensitivity. The Back-UPS will beep to 
confirm selection. See "Unit sensitivity" for details.
Self-Test 
(manual)
6On
The Back-UPS will perform a test of the internal 
battery. Note: This will happen automatically when the 
Back-UPS is turned ON or when the Back-UPS 
previously detected a bad battery.
Event 
Reset
0.2 On
When the Event screen is visible, press and hold 
D
ISPLAY, then press POWER, to clear the detected error 
event counter.
Error 
Reset
2Error
After an error has been identified, press P
OWER to 
remove the visual indication and return to standby 
status.
Problem Possible Cause Corrective Action
Back-UPS will not 
switch on.
The Back-UPS is not connected to AC 
power.
Ensure that the Back-UPS is securely 
connected to an AC outlet.
The circuit breaker has been tripped. Disconnect non-essential equipment 
from the Back-UPS. Reset the circuit 
breaker. Re-connect equipment one 
item at a time. If the circuit breaker is 
tripped again, disconnect the device that 
caused the trip.
The internal battery is not connected. Connect the battery.
The AC input voltage is out of range. Adjust the transfer voltage and 
sensitivity range.
The Back-UPS does 
not provide power 
during a AC power 
outage.
Ensure that essential equipment is not 
plugged into a S
URGE ONLY outlet.
Disconnect equipment from the SURGE 
ONLY outlet and re-connect to a Battery 
Backup outlet.
The Back-UPS is 
operating on battery 
power, while 
connected to AC 
power.
The plug has partially pulled out of 
the wall outlet, the wall outlet is no 
longer receiving AC power, or the 
circuit breaker has been tripped.
Ensure that the plug is fully inserted 
into the wall outlet. Ensure that the wall 
outlet is receiving AC power by 
checking it with another device.
The Back-UPS is performing an 
automatic self test.
No action is necessary.
The AC input voltage is out of range, 
the frequency is out of range, or the 
waveform is distorted.
Adjust the transfer voltage and 
sensitivity range.
The Back-UPS does 
not provide the 
expected amount of 
backup time.
Battery Backup outlets may be fully 
or improperly loaded.
Disconnect non-essential equipment 
from the Battery Backup outlets and 
connect the equipment to S
URGE 
outlets.
The battery was recently discharged 
due to a power outage and has not 
fully recharged.
Charge the battery cartridge for 16 
hours.
The battery has reached the end of its 
useful life.
Replace the battery.
Function Button
Timing 
(seconds)
UPS 
Status Description










