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Troubleshooting 34
Condition
Power
On LED
(green)
On
Battery
LED
(yellow)
Overloa
d LED
(red)
General
Alarm LED
(red)
Audible alarm
Can
alarm be
silenced
("Silencin
g an
audible
alarm"
on page
24)?
On battery—Output
voltage is out of
range
Off Flashing Off Flashing On—Continuous No
On battery—Output
wave is abnormal
Flashing Flashing Off Flashing On—Continuous No
For the location of individual LEDs, see "UPS front panel LED indicators (on page 8)."
UPS does not start
Action:
1. Be sure that the power cord is plugged in to a utility power receptacle.
2. Check the power source at the utility power receptacle.
3. Allow the UPS batteries to charge for 24 hours.
UPS operates on battery only
Action:
1. Save your work.
2. Power down the load devices connected to the UPS output receptacles.
3. Remove one or more load devices to reduce the power requirements.
4. Be sure the UPS configuration matches the utility voltage. Refer to "Selecting the UPS voltage
configuration (on page 19)."
UPS frequently switches between utility and battery
power
Action:
1. Check the input voltage and reconfigure the UPS ("Selecting the UPS voltage configuration" on page
19).
2. Contact a qualified electrician to verify that the utility power is suitable for the UPS.
UPS does not provide the expected backup time
Action: