There are two LEDs on each power supply. These LEDs are visible from the back of the Pilot. 
Table 1 Pilot Drive LED status and description | LED | Icon | LED color | Status | 
|---|
| AC OK/DC OK |    | Green | OFF – No AC power is present.SLOW BLINK – Normal operation. Input power is within specification. DC output voltage is not enabled.STEADY ON – Normal operation. Input AC power and DC output voltage are within specification.
 | 
| Service Required |    | Amber | OFF – Normal operation; no service required.STEADY ON – The power supply (PS) has detected a PS fan failure, PS over-temperature, PS over current, or PS over or under voltage.
 |