Xtreme Power Conversion Corporation
T90 User’s Manual
Page 28
Uninterruptible Power Supply
Troubleshooting
Displayed on LCD
Audible Alarm
Alarm Description
What You Should Do
Output Overload
Two Beeps
per second
The UPS is overloaded (in Line
Mode). Your equipment needs
more power than the UPS can
provide. The UPS operates in
bypass.
Shut off the least important equip
-
ment connected to the UPS. If this
solves the overload problem, the
UPS will switch from bypass back to
normal operation.
Battery Test
No Beeps
The UPS is doing a battery test.
No action needed. The UPS will
return to normal operation when it
successfully completes the battery
test.
Over-Charge
Constant beep
Batteries are overcharged.
Turn off protected loads. Turn off
UPS and call your local dealer
Low Battery
2 beeps every 5
seconds
The unit is operating on Battery
Power and will shut down soon
due to very low battery voltage
The unit will restart Automatically
when acceptable power returns.
On-Battery
Once every 5
seconds
The unit is operating on Battery
Power.
Save your data and perform a con
-
trolled shutdown.
Charger Failure
Constant beep
Charger has failed.
Phone the local dealer
Over-Temperature
Constant beep
High ambient Temperature.
Make sure the unit’s fans and vent
holes are not blocked, and make
sure the ambient surrounding tem
-
perature is not above 40 degree C.
If these conditions did not solve the
problem, call your service represen
-
tative.
Output Short
Constant beep
Output short circuit
Call the Local dealer
High output Voltage Constant beep
High output voltage
Call the Local dealer
Low Output Voltage Constant beep
Low output voltage
Call the Local dealer
Bus Fault
2 Beeps per
second
High internal DC bus Voltage.
Turn off protected loads. Turn off
UPS and call your local dealer
Site wiring Fault
1 Beep per
second
Voltage detected Between Neu
-
tral and Ground
UPS mains connector polar-
ity Wrong. Rotate the connector
(Schuko). UPS installed to mains
supply without ground. See page
15 on how to disable the Site wiring
alarm
Line abnormal
1 Beep per
second
Wrong AC Line backed up
during auto restart