Troubleshooting
Use the chart below to solve minor UPS installation problems. Contact APC Technical Support Staff for assistance with complex UPS problems. See APC Contact Information, page 15, for a location near you.
Problem and Possible Cause | Solution |
UPS will not turn on. | Press the ON button once to power the UPS and the load. |
• ON button not pushed. | |
• UPS not connected to AC power supply. | Check that the power cable from the UPS to the power |
| supply is securely connected at both ends. |
• UPS input circuit breaker tripped. | Reduce the load on the UPS by unplugging equipment and |
| reset the circuit breaker (on back of UPS) by pressing the |
| plunger back in. |
• Very low or no utility voltage. | Check the AC power supply to the UPS with a table lamp. |
| If very dim, have the utility voltage checked. |
• Battery not connected properly. | Confirm the battery connections. |
UPS will not turn off. | Do not attempt to use the UPS. Unplug the UPS and have it |
• Internal UPS fault. | |
| serviced immediately. |
UPS operates | |
• UPS’s input circuit breaker tripped. | Reduce the load on the UPS by unplugging equipment and |
| reset the circuit breaker (on back of UPS) by pressing the |
| plunger back in. |
• Very high, low, or distorted line voltage. | Move the UPS to a different outlet on a different circuit. |
Inexpensive fuel powered generators can distort | Test the input voltage with the utility voltage display. If |
the voltage. | acceptable to the load, reduce the UPS’s sensitivity. Refer |
| to Voltage Sensitivity, page 6, for procedures. |
UPS beeps occasionally. | None. The UPS is protecting the load. |
• Normal UPS operation. | |
UPS does not provide expected backup time. | Charge the battery. Batteries require recharging after |
• The UPS’s battery is weak due to recent outage or | |
is near the end of its service life. | extended outages. Also, they wear faster when put into |
| service often or when operated at elevated temperatures. |
| If the battery is near the end of its service life, consider |
| replacing the battery even if the replace battery indicator is |
| not yet lit. |
• The UPS is overloaded. | Check the UPS’s load display. Unplug less needed |
| equipment, such as printers. |
Front panel indicators flash sequentially. | None. The UPS will restart automatically when utility |
• The UPS has been shut down by remote control. | |
| power returns. |
All indicators are lit and UPS emits a constant beeping. | |
• Internal UPS fault. | Do not attempt to use the UPS. Turn the UPS off and have |
| it serviced immediately. |
All indicators are off and UPS is plugged into wall | outlet. |
• The UPS is shut down and the battery is | None. The UPS will return to normal operation when the |
discharged from an extended outage. | power is restored and the battery has a sufficient charge. |
The replace battery light is lit. | Do another self test to see if it clears. |
• Weak batteries. | |
• Replacement batteries not connected properly. | Confirm the battery connections. |
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