Allied Telesis XS900MX Series - Page 142

Chapter 10: Troubleshooting
142
Problem 8: The Switch ID LED on the front of the switch is flashing the
letter “F.”
Solutions: One or more of the following problems has occurred:
 A cooling fan has failed.
 The input voltage on the power supply is outside the normal
operating range.
 The internal temperature of the switch has exceeded the normal
operating range, and the switch might shut down.
Contact your Allied Telesis sales representative for assistance.