Owners manual

27Smart-UPS On-Line SRT5K/6K Tower/Rack-Mount 3U/4U
Troubleshooting
Use the table below to solve minor installation and operation problems.
Refer to the APC web site, www.apc.com for assistance with complex UPS problems.
The UPS features firmware that can be upgraded.
Go to the APC web site, www.apc.com/Support, or contact your local Customer Care Center for more
information.
Problem and Possible Cause Solution
UPS will not turn on or there is no output
The UPS is not connected to mains
power.
Be sure the power cable is securely connected to the UPS and to the mains power
supply.
The UPS display interface screen shows
very low or no mains power.
Check the mains power supply to verify acceptable power quality.
There is an internal UPS alert or warning. The UPS Display Interface screen will show a message to identify the alert or
warning and corrective action.
UPS emits an audible alarm
Normal UPS operation when running on
battery power.
The UPS is operating on battery power.
Refer to the status of the UPS as shown on the UPS Display Interface screen.
Press any key to mute all alarms.
The UPS emits an audible alarm and has
a red or amber back light on the UPS
Display Interface screen.
An Alarm or Warning condition exists.
Refer to the display interface screen for information.
UPS does not provide expected backup time
The UPS batteries are weak due to a
recent power outage or they are near the
end of service life.
Charge the batteries. Batteries require recharging after extended outages and wear
out faster when put into service often or when operated at elevated temperatures. If
the batteries are near the end of service life, consider replacing the batteries even if
the Replace Battery message is not displayed.
The UPS is experiencing an overload
condition.
The connected equipment exceeds the specified maximum load. Refer to the APC
web site, www.apc.com for product specifications.
The UPS will emit a sustained audible alarm until the overload condition is
corrected.
Disconnect nonessential equipment from the UPS to correct the overload
condition.