A01-00159 Rev B
29
4.0 TROUBLESHOOTING
If the UPS system does not operate correctly, please solve the
problem by using the table below.
Symptom
Possible cause
Remedy
No indication and alarm
even though the mains is
normal.
The AC input power is
not connected well.
Check if input power
cord firmly connected
to the mains.
The AC input is
connected to the UPS
output.
Plug AC input power
cord to AC input
correctly.
The icon
and the
warning code
flash on
LCD display and alarm is
sounding every 2 seconds.
EPO function is
activated.
Set the circuit in
closed position to
disable EPO function.
The icons of
and
and the warning code
flash on LCD display.
Alarm is sounding every 2
seconds.
Line and neutral
conductors of UPS
input are reversed.
Rotate mains power
socket by 180° and
then connect to UPS
system.
The icons of
and
and the warning code
flash on LCD display.
Alarm is sounding every 2
seconds.
The external or
internal battery is
incorrectly connected.
Check if all batteries
are connected well.
Fault code is shown as 27
on LCD display and alarm is
continuously sounding.
Battery voltage is too
high or the charger is
fault.
Contact your dealer.
Fault code is shown as 28
on LCD display and alarm is
continuously sounding.
Battery voltage is too
low or the charger is
fault.
Contact your dealer.