Service manual

Always On UPS Systems
M0704_NX_Series_Service_Manual V2.17 2012-06-12 61
22. INVERTER PHASE CONTROL (3T PCB)
This PCB acts as the interface between the Main Control PCB and each phase of the Inverter Module.
It relays the control signals and inverter drive waveforms from the Main Control PCB to the Inverter Driver (3G PCB)
within each phase of the Inverter Module.
It also monitors all aspects of the Inverter Module. This information is then forwarded to the Main Control PCB as part of
the control loop.
Figure 22.1
Location of 3T PCB in the PCB Module