Three-Phase UPS (10kVA-160kVA) Series
User Manual
7 Troubleshooting
93
No. Abnormal
phenomena
Fault diagnosis and checking items
Solution
3
When
mains
powers
down,
UPS halts and
has no output.
Check if battery input switch is switched
on and battery circuit is abnormal.
Switch on battery switch.
4
Touch screen and
LED are off.
Check whether bypass/ mains switch is
switched on and power board failure.
Maintain by professionals.
Whether the power switches are on ON
status.
Switch on the power switches.
5
red
indicator is on,
and buzzer beeps
continuously.
Check if load is short-circuit.
Find the short-circuit point, turn
off inverter, and then restart
inverter.
Check if the input mains is power down
and battery has under-voltage protection.
When mains is normal, self-start
UPS.
6
indicator
is on.
Output is overload.
Reduce load.
7
When
UPS
powers
on
normally, it can't
output normally.
Check if the SCR drive board of
bypass/inverter failure.
Maintain by professionals.
8
Communication
abnormal
The
connection
position
of
communication wire is wrong.
Connect the communication wire
correctly.
The
communication
software
isn't
successful installed.
Install communication software
correctly.
The computer communication window
setting is wrong.
Properly set the communication
port.
Above problems are all eliminated, but it
still cannot communicate normally.
Maintain by professionals.
