Each fan module has a status indicator (LED). If the LED is off, the fan is operational. If the LED is lit amber, the fan has faulted. The LEDs are located on the chassis mid-wall, adjacent to and aligned with the fan modules.
Figure 1: Fan module status indicator

| 1 Fan module | 
| 2 Fan module tab | 
| 3 Fan module status indicator | 
| 4 Fan door | 
Figure 2: Pilot fan module removal

| 1 Fan module tab | 
| 2 Fan modules | 
| 3 Fan door |