HP 8/20q HP StorageWorks 8/20q Fibre Channel Switch installation and reference - Page 12
Input power LED green, Heartbeat LED green, System fault LED amber
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Switch LEDs and controls The switch LEDs provide information about the switch's operational status. These LEDS include the Input Power LED (green), Heartbeat LED (green), and the System Fault LED (amber) (Figure 2). For information about port LEDs, see "Port LEDs" on page 14. The Maintenance button (Figure 2) is the only switch control. It is used to reset a switch or to recover a disabled switch. To apply power to the switch, plug the power cord into the switch AC power receptacle, located on the back of the switch, and into a 100-240 VAC power source. 1 2 34 1 Input Power LED (green) 3 System Fault LED (amber) Figure 2 Switch LEDs and controls 2 Heartbeat LED (green) 4 Maintenance button Input power LED (green) The Input Power LED indicates the voltage status at the switch logic circuitry. During normal operation, this LED illuminates to indicate that the switch logic circuitry is receiving the proper DC voltages. When the switch is in maintenance mode, this LED is extinguished. Heartbeat LED (green) The Heartbeat LED indicates the status of the internal switch processor and the results of the POST. Following a normal power-up, the Heartbeat LED blinks about once per second to indicate that the switch passed the POST and that the internal switch processor is running. In maintenance mode, the Heartbeat LED illuminates continuously. For more information, see "Heartbeat LED blink patterns" on page 42. System fault LED (amber) The System Fault LED illuminates to indicate that a fault exists in the switch firmware or hardware. Fault conditions include POST errors, over-temperature conditions, and power supply malfunctions. The Heartbeat LED shows a blink code for POST errors and over-temperature conditions. For more information, see "Heartbeat LED blink patterns" on page 42. 12