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NE Series (20-30kVA)
User Manual
Chapter 4 Operation Guide
Before disconnecting the output switch, please ensure that the output load is not in use, or,
once the output is disconnected, there will be no electric power output, which will cause the
power outage for use loads.
Step 3 Close the inverter system.
Press the OFF combination buttons on the panels for 1S, the inverter will be closed. The
operation also can be performed through touch screen.
Step 4 Disconnect the battery input switch, including the UPS’s input switch (BATTERY), battery
cabinet input switch and other external battery input switches.
Step 5 Disconnect the rectifier input switch (MAINS).
Disconnect the rectifier input switch, the rectifier will not transfer DC power from mains to
DC BUS, DC BUS will release electric power slowly, about 5 minutes later, the voltage will
drop to a safe voltage. To ensure safety, only start maintenance to the UPS after 10 minutes.
Step 6 Disconnect the bypass input switch (BYPASS).
Disconnect the bypass input switch, after the touch and LED off, the UPS will be shut down
completely.
----End
4.4 Operation for Manual Maintenance
To perform maintenance without any power interruption, follow the instructions.
The following operations should be done by professionals. Manufacturer doesn
’
t take the
responsibility for problems caused by unauthorized or untrained persons.
Step 1 Press the OFF button on the panel to close the inverter.
Step 2 After the BYPASS indicator on the panel lighting on, close the switches of rectifier mains and
battery (the battery switch of the UPS (if equipped) and battery cabinet switch are all off).
Take out the hanging lock of maintenance switch, place the switch of manual maintenance to
“ON”, then turn off the switch of bypass power (BYPASS) and output switch (OUTPUT), and
then start maintenance.
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