Issues:
There are many possible scenarios in which a Back-UPS product might drop or reboot the attached equipment. Below are potential problems ordered by commonness.

Product Line:
All APC Back-UPS and Conext related products.

Environment:
N/A

Cause / Resolution:

Problem #1: Equipment connected to the wrong outlets
Investigation: Follow the input power cord of the equipment that shut off back to the outlet that it is plugged into on the Back-UPS product, if the outlet’s label does not have the words “battery backup” this is why it has dropped the load.
Solution: Not all the outlets on a Back-UPS product provide backup power in the case of a power disturbance. Unplug the equipment and make sure your vital equipment gets plugged into the outlets labeled Battery Backup. Any thing that does not require backup power should be plugged into the surge protection only outlets.


Problem #2: Capacity overload
Investigation: In the technical specification section of the user’s manual that came with the Back-UPS product there is a watt rating listed. That is the maximum wattage that can be attached to the Battery Backup outlets and still have a decent runtime in the event of a power problem. If there is too much attached it will not be able to be supported by the battery. Make a list of all the equipment that is being plugged into the Back-UPS product.
Solution: Determine what equipment would be required to stay on in the event power failed for an extended period of time. These are the things that will need to be plugged into the battery backup outlets. The rest should be plugged into the surge only outlets that do not provide battery backup. If the total Wattage of the equipment that is being plugged into the battery outlets is more than the wattage of the battery outlets then the Back-UPS product will NOT be able to support that equipment in the case of a power disturbance.
You can confirm at https://www.apc.com/shop/us/en/tools/ups_selector if your Back-ups product is to small or not.

APC NEVER RECOMMENDS BATTERY BACKING UP A LASER PRINTER.

Problem #3:The Circuit Breaker tripped:
Investigation: Check the circuit breaker located on the rear of the UPS or near the input cord. The circuit breaker is labeled ""Press to Reset"". The circuit breaker will ""trip"" or pop out if there is a severe overload on the output side of the UPS (i.e., too much equipment is plugged into the UPS).
Solution: Reducing the load, then press the ""Reset"" button in. If the circuit breaker is tripped if it protrudes approximately 1/4"" out from the unit. Once pushed back in, try to power the unit up again. If breaker will NOT stay in, contact APC at Technical Support and have the Model and serial number available.


Problem #4: The UPS exhausted its available battery power
Investigation: Back-UPS products can only supply battery power for a limited time before the unit must shutdown to protect itself