
15
Symptom
Possible cause
Remedy
Battery backup time is shorter
than nominal value
Batteries are not fully
charged
Charge the batteries for at
least 5 hours and then
check capacity. If the
problem still persists,
consult your dealer.
Batteries defect
Contact your dealer to
replace the battery.
Fault code is shown as 05 on LCD
display. At the same time, alarm is
continuously sounding and output
is cut off.
A UPS internal fault has
occurred and BUS is short
circuited.
Consult your dealer. If the
UPS power is on again
before repair, the DC/DC
mosfet will damage.