Njoy Ranger 60KR User Manual page 22

3. Remove units from the parallel system
There are two methods to remove units from the parallel system:
First method:
1) Press the "OFF" key twice and each press should be last for more
than 0.5s. Then, the UPS will enter into Bypass mode or No Output mode
without output.
2) Turn off the external output breaker of this unit, and then turn off
the input breaker of this unit.
3) After this UPS shuts down, turn off the battery breaker (for long-
run model) and remove the parallel and share current cables. And then
remove the unit from the parallel system.
Second method:
1) If the bypass is abnormal, you can not remove the UPS without
interruption. You must cut off the load and shut down the system.
2) Make sure the bypass setting is enabled in each UPS and then
turn off the system. All UPSs will transfer to Bypass mode. Remove all the
maintenance bypass covers and set the maintenance switches from "UPS"
to "BPS" position. Turn off all the input breakers and battery breakers in
parallel system.
3) Turn off the output breaker and remove the parallel cable and share
current cable of the UPS which you want to remove. Now, you can remove
the UPS from parallel system.
4) Turn on the input breaker of the remaining UPS and the system
will transfer to Bypass mode. Set the maintenance switches from "BPS" to
"UPS position and put the maintenance bypass covers back on.
5) Turn on the remaining UPS according to the previous section.
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