OUT Inputfail Power | Cisco Systems CHAS-7K, MAS-7507, MAS-7K

Verifying the Installation

In systems with a single DC-input power supply, and in systems with redundant power when both power supplies are shutting down, the out fail LED goes on momentarily as the system ramps down, but goes out when the power supply has completely shut down. In systems with redundant power and one power supply still active, the out fail LED on the failed power supply will remain on (powered by the active supply).

The DC-input power supply LEDs include the input power LED and the out fail LED.

(See Figure 13.) The green input power LED is on when the input power is applied. The yellow out fail LED is normally off, but ﬂashes at power on for a lamp test.

The out fail LED goes on if the power supply shuts down for either of the following reasons:

•Power supply DC-output failure, which could be caused by loss of DC-input power (input line failure or operator turned off system power) or an actual failure in the DC-input power supply

•Power supply shutdown, initiated by the power supply because it detected an out-of-tolerance temperature or voltage condition in the power supply

Figure 13 DC-Input Power Supply LEDs (Similar Location to the AC-Input Power Supply)

OUT

INPUTFAIL

POWER

H2498

Caution Always ensure that each power supply is fully seated in the bay and that the captive installation screw is tightened before restarting the system. The captive installation screw provides proper grounding and prevents the power supply from sliding out of the bay and dislodging from the backplane power connectors.

When you turn the power supply on to power up the system, the green AC power LED on the power supply should go on and remain on, and the DC fail LED should remain off. The AC power LED will not go on if the power supply switch is not fully in the on () position, or if the power supply is not properly seated in the bay, and the connectors are not making proper contact, or if the supply is not receiving AC input power.

The yellow DC fail LED is normally off, but goes on if the power supply shuts down for either of the following reasons:

•Power supply DC section failure, which could be caused by loss of AC power (input line failure or operator turned off system power), or an actual failure in the power supply

•Power supply shutdown, which is initiated by the power supply because it detected an

out-of-tolerance temperature or voltage condition in the power supply

Cisco 7000 and Cisco 7507 Chassis Replacement Instructions 27