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NE Series (20-30kVA)
User Manual
Chapter 6 Troubleshooting
No.
Phenomenon
Possible reason
5
After starting, the UPS works
normally, but some time later,
the UPS shuts down
automatically.
In the status of battery supply power, the battery is
protected for low-voltage caused by discharging, the
system shuts down automatically. The phenomenon is
normal. Once the mains recover, the system will start
automatically and charge for the battery.
Warning: if the battery stays in low-voltage for a long
time, it will influence the life span of battery. After
low-voltage protection for battery, if the mains cannot
recover for long time, it is necessary to disconnect the
battery switch to protect the battery, and restart the
UPS when mains normal, and charge
for the battery.
6
After the UPS starts to work for a
while,
the
buzzer
beeps
intermittently.
The voltage of grid is too low, and the UPS works in
battery inverting status, finally, it put the battery into
low-voltage protection.
7
When mains normal, the UPS
outputs normally, when mains
failure, the UPS is without
output.
Battery fault or the battery group is damaged.
Charger fault. The charging for battery fails, leading to
no battery power capability.
Battery wire connection is bad or the connection of
terminal is bad.
The battery switch is not closed.
After serious overload, the UPS is not restarted,
which causes the UPS always stay in bypass output
status.
8
The buzzer beeps continuously,
inverter fault and the UPS turn to
bypass status to supply power.
Overload or output is short-circuiting, the UPS shuts
down to protect automatically.
Drive or power tube is fault.
Main controlling board is fault.
DC fuse is open-circuit.
