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Always “On” UPS Systems Inc.
17
Troubleshooting
Please follow the guidelines below for solutions to common problems:
Check UPS input plug and wiring.
Check UPS input voltage.
Please prepare the information as follows for service personnel:
UPS model number and serial number
Description of problem(s) in detail.
General Problems
Problems Possible causes Solution
UPS has no reaction
while AC power is
connected
Fuse/Breaker at back panel open
No AC input
UPS fault
Battery failure
Replace Fuse/Switch breaker on
Check AC power
Call for service
Call service center to replace batteries
UPS no reaction while
AC power is connected,
yet starts after pushing
power on/off switch
Breaker at back panel blown
No AC input
UPS AC detecting circuit fail
Switch breaker
Check AC power
Call for service
UPS goes into back-up
mode while connected to
AC power
Utility voltage or frequency
abnormal
UPS AC detecting circuit failure
Check AC power
Call for service
Fault LED lit
Inverter fault.
Over temperature
Battery over voltage.
DC bus fault.
Overload fault.
Call for service
Check load situation
Battery can not provide
normal back-up power in
the event of a blackout
Battery deteriorated
Batteries not fully charged
Battery charger damaged
Charge batteries and reset
If that doesn’t work call for service
After AC connected to
UPS, alarm sounds short
and fast beeps and UPS
shuts down
Abnormal utility power Check input power