4 Check and start operation
4-3 Interpreting beeps and displays
S8BA-24D24D
□□□
LF
60
No.
Status
indicator
UPS
outpu
t
Beep
Charge/
Dischar
ge
“
Power”
switch
Input
power
supply
Description
Procedures
17
OFF
Continuous Discharge
ON
OFF
Overcurrent (115% or
higher) and output
voltage drop detected
because connections
exceeded capacity
limit.
Turn OFF all the
"Power" switches on the
UPS and connected
devices, reduce the
connected devices, and
turn ON the "Power"
switches on the UPS
and remaining
connected devices.
18
OFF
Continuous
---
ON
ON
Stopped due to
short-circuit on
connected device
side or due to
connections
exceeding capacity
limit significantly.
Check that the DC input
of any of the connected
devices is not
short-circuited and that
connections did not
exceed the rated
capacity.
19
ON
Continuous
---
ON
ON/
OFF
Output voltage error
(Up).
Turn OFF all the
"Power" switches on the
UPS and connected
devices, and turn ON
the "Power" switch on
the UPS only again.
20
ON
Continuous
---
ON
ON/
OFF
Output voltage error
(Down).
21
ON
Continuous
Charging
stopped
ON
ON
Charging stopped
due to battery
charging voltage error
(Up).
22
ON
Continuous
Charging
stopped
ON
ON
Charging stopped
due to battery
charging voltage error
(Down).
23
ON
Continuous
---
ON
ON/
OFF
Internal temperature
error (overheat).
24
ON
Continuous
---
ON
ON/
OFF
Error detected by
inverter circuit check
of self diagnosis test.
25
ON
Continuous
---
ON
ON
Charging current
error (overcurrent).
26
ON
Continuous
---
ON
ON/
OFF
Unable to
communicate with
battery through
SMbus.
indicates blinking
indicates the display is ON
indicates the display is OFF