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switch.
Enter the setting interface by pressing
for 0.5s.
Select the nbp interface by pressing
or
for 0.5s. Press
key for
confirmation.
Select “nbp ON” by pressing
or
for 0.5s again. Press
key for confirmation.
UPS enters the forced bypass mode afterwards.
After closing the maintenance switch, UPS provides power supply for the loads through
bypass and maintenance bypass.
Turn off the inverter by pressing
+
for 0.5s.
After disconnecting the mains, bypass and output switches as well as the external battery
switch, UPS provides power supply for the loads through maintenance bypass.
UPS output has been switched to maintenance bypass so far. The loads have been powered by
maintenance bypass mode. The draught fan of the complete unit has stopped running. UPS has
been completely shut down. Wait until the bus voltage is lower than 36V, the maintenance personnel
can conduct routine maintenance to the UPS. However the load equipment does not have AC power
supply fault protection.
4.3.3.2 Exiting the maintenance bypass mode (Single unit)
Perform the following operating steps after the maintenance, so as to switch the loads without AC
power supply fault protection to the ones with UPS power supply protection.
Carefully confirm that there are no objects left inside the UPS cabinet, and the UPS internal
connecting wires are recovered to the status before the maintenance.
Close the bypass switch. After the LCD display screen becomes normal, check the setting
interface, and confirm that the manual bypass is turned on. At this moment, the loads are
powered by bypass mode and maintenance bypass mode together.
Close the mains switch. UPS starts up after pressing
+
for more than 0.5s.
Carefully observe whether the UPS rectifier and inverter are under normal operation. If they
are, keep performing the following steps; if they are not, please shut down the UPS,
disconnect the mains and bypass switches, and continue the maintenance.
Close the output switch after the inverter is under normal operation. UPS is powered by
bypass mode and maintenance bypass mode together.
After disconnecting the maintenance bypass switch, UPS is powered by the bypass mode.
Close the external battery switch, and set the “manual bypass” on the panel at “OFF”. At this
moment, the operation of exiting the maintenance mode has been accomplished, and the
loads without AC power supply fault protection have been switched to the ones with UPS
power supply protection.
4.3.4 Battery cold start
If it is necessary to use the battery for startup, the operating steps are as follows:
Close the battery switch, and press
to light up the display screen;
After the LCD display screen becomes normal, press
+
for more than 0.5s to start
up the UPS.
Summary of Contents for 6KVA
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