36
7 Troubleshooting
Faults
Possible cause
Solution
Fault/Warning
code
Fault icon
Alarm
A02
Blink once
every
second
Beep once
every second
Battery voltage
low
The UPS output will
be cut off, please
switch to the backup
power.
A03
Blink once
every
second
Beep once
every second
UPS power on
abnormal
Check the battery of
the UPS connected
properly.
A04
Blink once
every
second
Beep
continuously
Battery
overcharging
Please
contact the
distributor or Service
center
A05
Blink once
every
second
Beep once
every second
Fan failure
Ensure that the fan is
not locked
A06
Blink once
every
second
Beep once
every two
minutes
Maybe reversed
polarity (L, N)
of site wiring
(make sure the
ground connect
right). Or the
voltage between
neutral
wiring
to
protective
ground is to
high
Please
check
the
polarity of the neutral
wiring and the line
wiring, ensure that The
green/yellow
wire
connect
protective
ground
properly,
or
make sure the voltage
between neutral wiring
to protective ground is
less than 36VAC
Table 7-2 UPS troubleshooting of LCD panel indicator
When you contact the service center, please provide the following information:
● Model No and Serial No of the UPS.
● The date when the problem arose.
● Complete description of the problem, including the panel display, alarm
warning, and power condition and the load capacity. If the UPS is a long
backup time model, you may also provide the battery information.