Xtreme Power Conversion Corporation
P90g User’s Manual
Page 30
Uninterruptible Power Supply
Troubleshooting
If the UPS does not operate correctly, please use the table below to troubleshoot the problems.
Symptom
Possible cause
Remedy
No indication and alarm even
though the utility is normal.
The AC input power is not con
-
nected well.
Check that the input power cord is
firmly connected to the utility.
The AC input is connected to the
UPS output.
Plug the AC input power cord into
the AC input utility correctly.
The icon and the warning code
are flashing on LCD display and
alarm is sounding every second.
EPO function is enabled.
Set the circuit to the closed posi
-
tion to disable EPO function.
The icon
and
are flashing on
LCD display and alarm is sounding
every second.
Line and neutral conductors of UPS
input are reversed.
Have a qualified electrician correct
the input receptacle wiring.
The icon
and
are flashing on
LCD display and alarm is sounding
every second
The internal battery is incorrectly
connected.
Check to make sure all batteries are
properly connected.
Fault code is shown as 27 and the
icon
is showing on LCD display
and alarm is continuously sound
-
ing.
Battery voltage is too high or the
charger is in fault condition.
Contact your dealer for support.
Fault code is shown as 28 and the
icon
is showing on LCD display
and alarm is continuously sound
-
ing.
Battery voltage is too low or the
charger is in fault condition.
Contact your dealer for support.
The icon
and
are
flashing on LCD display and alarm is
sounding twice every second.
UPS is in overload.
Remove excess loads from
UPS output.
UPS is in overload. Devices con-
nected to the UPS are being fed
directly from the electrical utility
via the Bypass
Remove excess loads from UPS
output.
After repetitive overloads, the UPS
is locked in the Bypass mode.
Connected devices are being fed
directly by the electrical utility.
Remove excess loads from UPS
output, then shut down the UPS
and restart.
Fault code is shown as 43 and the
icon
is showing on LCD
display and alarm is sounding con
-
tinuously.
The UPS shut down automatically
because of the overload condition
on the UPS output.
Remove excess loads from the UPS
output and restart the UPS.
Fault code is shown as 14 and
alarm is sounding continuously.
The UPS shut down automatically
because short circuit condition oc
-
curred on the UPS output.
Disconnect loads and check to see
if output wiring or connected devic
-
es are in short circuit status.
