| Symptom |
Possible Cause |
What to do |
| No lights/menu, no alarm (UPS not ON) |
Front panel switch in off
position. Rear panel circuit breaker tripped.
No incoming utility. |
Turn on switch. Reset circuit breaker.
Check utility input power. |
| Low AC is
indicated, and UPS is not supplying power |
Incoming AC is
< 75% of nominal and >72% of nominal |
On LED front
panel, press TEST/ALARM SILENCE switch. On LCD front
panel, press any button to go to the battery mode. |
| No output, some LEDs are
on, or the LCD shows error message. |
This is an error code, and there
are many different causes. |
Look up the message or error
code, and take the appropriate action and/or call for service. |
| Backup time is
less than the rating |
Battery not
fully charged. 1 or more dead batteries.
Load is greater than estimated.
Charger failure. |
Recharge
batteries for at least 8 hours. If problem persists, call for service. Verify load is
correct. |
| The UPS appears to be working,
but has no output voltage |
Output turned off by computer or
external control. |
Select STATUS menu, and search
for OUTPUT OFF message. Turn on with SETUP menu or cycle Power Switch. Verify remote OFF
contact / switch is off. |
| UPS beeps
continuously |
Imminent
shutdown pending. Error code will be displayed. |
Look up the
message or error code, and take the appropriate action and/or call for service. |