Technical Documentation

Power Supply LEDs in an EX 8200 series Switch

An AC power supply has three LEDs on its faceplate. See Figure 1. These LEDs display information about the status of a power supply.

Table 1 describes the LEDs on an AC power supply in EX 8200 series switches.

Figure 1: AC Power Supply LEDs in an EX 8200 series Switch

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Table 1: Power Supply LEDs in EX 8200 series Switches

LED StateDescription

INPUT OK

Unlit

Indicates one of the following:

  • Power supply is disconnected from AC power feed.
  • AC power input voltage is not within normal operating range.
  • No AC power input.

Green

  • AC power input voltage is high line (200–240 VAC).

Yellow

  • AC power input voltage is low line (100–180 VAC).

OUTPUT OK

Unlit

Indicates one of the following:

  • DC output voltage is not within normal operating range.
  • Power supply is not supplying DC power correctly.

Green

  • DC power output is within normal operating range.

Yellow

  • Power supply has been disabled internally by the system.

FAIL

Unlit

  • Power supply is functioning normally.

Yellow

  • On steadily—Power supply has failed.
  • Blinking—Demand for output power exceeds the supply.

Note: If the INPUT OK LED and the OUTPUT OK LED are unlit, the AC power cord is not installed properly or the power supply fuse has failed.

If the INPUT OK LED is lit and the OUTPUT OK LED is unlit, the AC power supply is not installed properly or the power supply has an internal failure.

If the FAIL LED is lit, the power supply has failed and must be replaced. If the FAIL LED is blinking, add a power supply to balance the power demand and supply.