Cisco Systems SN 5428 manual Identifying Startup Problems

Chapter 3 Troubleshooting

Identifying Startup Problems

•The chassis fan assembly operates when the system power is on. The fan may continue to operate even when the power supply shuts down the SN 5428 Storage Router because of an overtemperature or overvoltage condition (although it does shut down for a power supply shutdown).

The following are simple checks you can make to determine if there is a fan problem:

–Listen to the fan assembly to determine if it is operating.

–Check for any obstructions restricting airflow through the storage router.

If you determine that the fan assembly is not operating properly, contact a customer service representative.

Identifying Startup Problems

Observe the operation of the SN 5428 Storage Router and its front-panel LEDs to determine startup problems. LEDs indicate storage router states in the startup sequence. By checking the LEDs, you can determine when and where the storage router failed in the startup sequence.

Perform the following steps when you power up the SN 5428 Storage Router:

Step 1 Listen for the chassis fan assembly operation. If it does not operate, see the “Troubleshooting the Power Supply” section on page 3-3. If you determine that the power supply is functioning normally and that the fan assembly is faulty, contact a customer service representative. If the fan assembly does not function properly at initial startup (there are no installation adjustments that you can make), contact a customer service representative.

Step 2 Check the POWER LED on the front panel. The POWER LED turns on immediately when power is on. The LED remains on during normal SN 5428 Storage Router operation. If the LED is not on, see the “Troubleshooting the Power Supply” section on page 3-3.

Step 3 Check the STATUS and FAULT LEDs on the front panel. See the “Front-Panel LEDs” section on page 1-5for LED descriptions.

	Cisco SN 5428 Storage Router Hardware Installation Guide
3-2	OL-4796-01