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Troubleshooting
4-3
Table 4-2
Troubleshooting Guide (After Start)
continued
Symptom Possible Cause Suggested Action
Utility LED and On Battery LED are
flashing red
The utility frequency is out of
tolerance.
Contact a qualified electrician to
ensure that utility power is
suitable for the UPS.
Utility LED is flashing red The utility input voltage is outside
the ±12% nominal range.
If this happens repeatedly, check
the input voltage and reconfigure
the unit.
Contact a qualified electrician to
ensure that utility power is
suitable for the UPS.
Utility LED is flashing green The utility power is within the
acceptable range, but the output
is off.
Press the ON button.
UPS frequently switches between
utility and battery power
There are utility power variations. The utility voltage is frequently
outside the UPS operating range.
Update the configuration.
Contact a qualified electrician to
ensure that utility power is
suitable for the UPS.
Overload LED is red Protected devices are exceeding
the UPS power rating.
Remove one or more devices to
reduce the power requirements.
(UPS may switch from utility to
Auto-Bypass.)
Make sure that the devices are
not defective.
On Battery LED is flashing red There is low battery voltage. If the UPS is supplying battery
power, save current work and
shut down the system. Allow the
batteries to charge.
If the UPS is supplying utility
power, no intervention is required.
Allow the batteries to charge.
Insufficient warning of low
batteries
Battery service is required. Allow the batteries to charge for
24 hours, then initiate a self-test.
If the LED is red, replace the
batteries.
The Shutdown Delay configuration
is inappropriate.
Use the Compaq power
management software to specify
a suitable delay.
continued