Xtreme Power Conversion Corporation
E91 User’s Manual
Page 49
Uninterruptible Power Supply
4. Trouble Shooting
Symptom
Possible cause
Remedy
No indication and alarm in the
front display panel even though the
mains is normal.
The AC input power is not con
-
nected well.
Check if input cable firmly connect
-
ed to the mains.
The warning code 0B.
EPO function is activated. At this
time, the EPO switch is in “OFF”
status or the jumper is open.
Set the circuit in closed position to
disable the EPO function.
The warning code 01.
The external or internal battery is
incorrectly connected.
Check if all batteries are connected
well.
The warning code 09.
UPS is overload.
Remove excess loads from UPS
output.
UPS is overloaded. Devices con
-
nected to the UPS are fed directly
by the electrical network via the
Bypass.
Remove excess loads from UPS
output.
After repetitive overloads, the UPS
is locked in the Bypass mode. Con
-
nected devices are fed directly by
the mains.
Remove excess loads from UPS out
-
put first. Then shut down the UPS
and restart it.
Fault code is shown as 43.
UPS is overload too long and be
-
comes fault. Then UPS shut down
automatically.
Remove excess loads from UPS
output and restart it.
Fault code is shown as 14, 15, 16,
17, 18 or 19,
The UPS shut down automatically
because short circuit occurs on the
UPS output.
Check output wiring and if con
-
nected devices are in short circuit
status.
Other fault codes are shown on
LCD display and alarm beeps con
-
tinuously.
A UPS internal fault has occurred.
Contact your dealer
Battery backup time is shorter than
nominal value.
Batteries are not fully charged.
Charge the batteries for at least 7
hours and then check capacity. If
the problem still persists, consult
your dealer.
Batteries defect
Contact your dealer to replace the
battery.
The warning code 0A.
Fan is locked or not working. Or the
UPS temperature is too high.
Check fans and notify dealer.
The warning code 02.
The input neutral wire is discon
-
nected.
Check and correct the input neutral
connection. If the connection is ok
and the warning is still displaying,
please check input fuses of S and T.
The S or T input fuse is broken.
Replace the fuse.
