TROUBLESHOOTING
Use the chart below to solve minor UPS installation problems. Refer to the APC web site www.apc.com for assistance with complex UPS problems.
PROBLEM AND POSSIBLE CAUSE | SOLUTION |
UPS WILL NOT TURN ON |
|
ON button not pushed. | Press the ON button once to power the UPS and the equipment. |
UPS not connected to power supply. | Check that the power cable from the UPS to the utility power supply is |
| securely connected. |
UPS input circuit breaker tripped. | Reduce the load on the UPS by unplugging equipment and resetting the |
| circuit breaker (on the back of UPS) by pressing the plunger in. |
Very low or no utility voltage. | Check the AC power supply to the UPS by plugging in a table lamp. If the |
| light is very dim, have the utility voltage checked. |
External battery not connected properly. | Check that the battery connector is fully engaged. |
|
|
UPS OPERATES ON BATTERY ALTHOUGH NORMAL LINE VOLTAGE EXISTS | |
UPS input circuit breaker tripped. | Reduce the load on the UPS by unplugging equipment and resetting the |
| circuit breaker (on the back of UPS) by pressing the plunger in. |
Very high, low, or distorted line voltage. | Move the UPS to a different outlet on a different circuit. Test the input |
Inexpensive fuel powered generators can | voltage with the utility voltage display. |
distort the voltage. |
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|
BYPASS LED IS LIT, THE OVERLOAD LED IS LIT, AND THE FAULT LED IS LIT | |
Too many loads have been connected to the | Remove all nonessential loads. Push the ON button to restore power. |
UPS. |
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|
External overload condition. | Wait until overload condition passes. You may need to push the ON button |
| to reset the UPS. |
|
|
FAULT LED IS LIT, THE OVERLOAD LED IS LIT, AND THE BYPASS LED IS NOT LIT | |
Overload condition. | Remove all nonessential loads. Push the OFF button, then the ON button to |
| restore power. |
|
|
FAULT LED IS LIT AND THE OVERLOAD LED IS NOT LIT | |
Internal UPS fault. | Do not attempt to use the UPS. Turn the UPS off and have it serviced im- |
| mediately. |
|
|
REPLACE BATTERY LED IS LIT |
|
Weak battery. | Allow the battery to recharge for at least |
| |
Battery not connected properly. | Check that the battery connector is fully engaged. |
|
|
UPS BEEPS OCCASIONALLY |
|
Normal UPS operation. | None. The UPS is protecting the connected equipment. |
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|
UPS DOES NOT PROVIDE EXPECTED BACKUP TIME | |
Batteries are weak due to recent outage or | Charge the batteries. Batteries require recharging after extended outages. |
are near end of service life. | They wear faster when put into service often or when operated at elevated |
| temperatures. If the battery pack is near the end of its service life, consider |
| replacing it even if the Replace Battery LED is not yet lit. |
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|
FRONT PANEL INDICATORS FLASH SEQUENTIALLY | |
UPS was shut down remotely. | None. The UPS will restart automatically when utility power returns. |
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