Table of Contents
Advertisement
5.4.1 Power Module (PM) Fan Tray
The inverter electronics are convection cooled. The primary equipment used for
this function consists of a fan tray located in a plenum within the inverter power
module. The PM electronics are isolated, and heat is transferred to the plenum
airflow via a large heatsink.
The PM fan tray is modular and holds four smart fans that that operate together
and also provide redundancy; the inverter will operate to full power with two fans
operating and will enter a power derating mode under failure of a second fan.
These fans are protected by air filters at the plenum air inlet and outlet.
5.4.1.1 PM Fan Tray removal procedure
Refer to Figure 5-12 and follow the steps outlined below:
1. Remove the outlet filter assemblies on the left and right side of the PM by
removing four screws on each. If filter maintenance is the goal, the two filter
elements can be cleaned at this time and reassembled.
2. On the right side, unplug the fan power wiring from their terminals.
3. On the right side, loosen the four knurled screws and remove the two screw
assemblies.
4. Grasp the handle at the top of the fan tray and pull straight out from PM chassis.
To reassemble reverse the order of the above procedure and tighten screws to
torque values indicated in Figure 5-12.
81
Maintenance
Advertisement
Table of Contents
