X47
X48
X49
X4E
X4F
X50
X51
X52
X54
xsc
Mains is abnormal
The phase
Check if the power grid blackout occurs and
make sure that the power grid is normal.
Check if the power distribution breaker is trip
or damaged and make sure that the breaker
is normal and closed.
sequence of bypass Check if the wiring and front-end power
and mains is not
consistent
Bypass phase
sequence error
Bypass default
phase
Bypass frequency is
abnormal
Bypass zero line is
not connected
distribution of the UPS are normal.
The bypass phase sequence is connected
incorrectly, it needs to exchange any two
phases or ensure that the phase difference
is 120
°
.
Check if the bypass wiring, bypass voltage
and bypass power distribution breaker are
abnormal.
Check if each phase frequency of the UPS
bypass voltage is within the set range with a
multimeter.
Check if the bypass wiring, bypass voltage
and bypass power distribution breaker are
abnormal.
Check if the bypass wiring, bypass voltage
Bypass is abnormal and bypass power distribution breaker are
abnormal.
Disconnect the non-critical loads to extend
the power supply time of other critical loads.
Low voltage battery If the mains power distribution is abnormal,
please restore the mains power supply as
soon as possible.
Battery is not
connected
Overload alarm
Check if the battery wiring and battery power
distribution breaker are normal; check if the
battery is damaged.
Disconnect the non-critical loads.
~45~
