An AC power supply has one bicolored power supply status LED on its faceplate. This LED displays information about the status of the power supply. See Figure 1.
Figure 1: AC Power Supply LEDs on a QFX3100 Director Device

Table 1 describes the power supply status LED on an AC power supply in a QFX3100 Director device.
Table 1: Power Supply LED on a QFX3100 Director Device
LED | Color | State | Description |
|---|---|---|---|
Power | Unlit | Off | There is no power to the power supply, or the input voltage is not within the normal operating range. |
Green | On steadily | Power supply is functioning normally, and is powering the system. | |
Yellow | On steadily | Power supply is in standby mode. The power supply is powered on but is not providing power to the system. |