8 Troubleshooting
S8BA-24D24D
□□□
LF
90
8 Troubleshooting
Perform the checks shown below if the unit is operating abnormally.
Problem
Check and remedy
The unit does not start
operation.
The LED does not appear
when the AC input is
connected to commercial
power and the “Power” switch
is turned ON.
Make sure the AC input is securely connected to commercial power.
If the status indicator does not display properly after you perform the above operation, there is a
problem with the unit.
See “4-3 Interpreting beeps and displays”.
Backup is not possible.
The computer stops when a
power failure occurs.
The battery may not be fully charged.
Perform the test after charging the battery for at least 4hours.
The battery can be charged just by connecting the AC input to a wall outlet.
The “Power” switch can be either ON or OFF.
When input power supply is connected to the unit and the power is turned ON, battery charging
operation starts.
When the “Power” switch is turned OFF, the battery charging operation does not start.
Backup is performed too
frequently.
Frequent switching is
performed although a power
failure does not occur.
You hear the sound of
switching.
Variations (decrease) in the input power occur frequently. Or, noise may be included that
significantly distorts the voltage waveform of the input power.
▪
Try and check what happens when connecting the unit to a different wall outlet (commercial
power) located some distance away from the device consuming a large amount of power.
▪
This problem may occur also when you connect many devices to a plug strip or extension cord
connected to the UPS if it is a long or thin cable.
The power is not turned ON
even when the “Power” switch
is pressed.
If the status indicator displays “ ” or “ ”, check the voltage of the input power supply.
The battery replacement alert
“ ” is displayed.
▪
Battery replacement alert “
” blinks: The battery is judged to be deteriorated in the
self-diagnosis test. Backup operation lasts only for a short period of time. Replace the battery.
See “5-1 Checking the battery”.
▪
Battery replacement alert “ ” turned ON: The battery life counter has counted up to the limit.
The battery has been used up to its end-of-life. Replace the battery.
See “5-2-1 Notification that the battery needs to be replaced”.
The UPS life alert “ ” is
displayed.
The UPS has been used up to its end-of-life. Replace the UPS with a new one as soon as
possible.
The status indicator shows
“
”
, and the beeper sounds
at 0.5-second intervals.
There are too many connected devices. Reduce the number of connected devices until “
”
is
displayed on the status indicator.
The status indicator blinks
“
”
, and the beeper sounds
continuously.
Output stopped due to exceeded connection capacity.
Turn OFF all power to the unit and connected devices, and reduce the number of connected
devices. Then, turn the power to the unit and connected devices back ON and check whether
“ ” is displayed on the status indicator.
