Problem
Causes
Solutions
No AC input
Check AC power
UPS fault
Call for service
UPS no reaction while AC
is connected
Battery damaged
Call service to replace batteries
Input / output sensor fault
Call for service
No AC input
Check AC power
UPS no reaction while AC
is connected, yet DC starts
after pushing power on/off
switch
UPS fault
Call for service
AC voltage or frequency
abnormal
Check AC power
UPS goes into DC mode
connected to AC
UPS AC detecting circuit
fails
Call for service
UPS still in bypass mode
after de-green mode
function
UPS still in POWER OFF
status
Press power on/off key,
Buzzer sound once and the UPS
Become normal
UPS is proceeding
controlling process
Wait for a while to operate the UPS
Keys on front panel don
’
t
work
Key damaged
Call for service
Press FUNCTION key in
AC mode, but the UPS goes
back to AC mode within
less than 10 seconds
Internal battery
deteriorated
Call service to replace batteries
UPS abnormal
Call for service
Fault LED lit
Output load abnormal or
short circuited
Check load
Internal battery
deteriorated
Call service to replace batteries
Batteries not fully charged
Charge the battery
Battery cannot provide
normal back up power
when there is no AC input
Battery charger damaged
Replace charger and charge the
battery if necessary
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Содержание ALS Series
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