General Description
3
Maintenance Mode
For maintenance or repair, the NX may be operated in maintenance mode. To place the NX in mainte-
nance mode, the load must be transferred to bypass and the inverter must be turned off. When those
conditions are met, the rotary switch may be turned to MAINT and the UPS may be shut down, per-
mitting disconnecting the batteries for maintenance.
!
CAUTION
The internal maintenance bypass must not be used when the UPS system is in 1+1 parallel.
!
WARNING
The UPS input and output must be protected with external overcurrent protection devices. In
maintenance mode, the input and output busbars remain energized.
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