Cisco Systems Cisco 12406, Cisco 12006 manual OL-11497-03

Chapter 4 Troubleshooting the Installation

Problem Solving with Subsystems

–For installations in North America, the AC input power range is between 100 and 240 VAC, with a 20A service. For international environments, the AC input power range is between 185 and 264 VAC, with a 16A service.

–Power supplies are providing –48 VDC to internal components.

–All internal DC voltages are within tolerance.

If the AC power source or any of the power supply internal DC voltages exceed allowable tolerances, the DC LED will not go on, or will go off shortly after you turn on the power standby switch.

The power supplies are monitored by the MBus module and the RP for over- or undervoltage and over- or undercurrent conditions.

To help isolate a problem with an AC-input power supply, follow these steps:

Step 1 If the AC LED is off, verify that the power supply is fully seated in its bay, the ejector levers are flush with the power supply faceplate, and the captive screws are secured.

•If the AC LED goes on, go to Step 6.

•If the AC LED remains off, go to Step 2

Step 2 Check the AC power source.

a.Check the AC power cord from the power source to the router.

–Verify that the power cord is seated securely in the PDU and the AC outlet.

–Verify that the power cord is not worn or damaged. If the insulation appears cracked or broken, or the plugs appear loose, replace the power cord with a new power cord.

b.Verify that the AC power source circuit breaker is on and has not tripped, and that the circuit breaker has the proper current rating.

c.Verify that each power supply in the router is attached to a separate AC power source.

d.If the router is connected to an uninterruptable power supply (UPS), verify that the UPS is functioning correctly. Note that there might be a UPS for each power supply in the system.

	Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
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