Cisco 5508 Installation Guide - Page 7

Controller Overview Table 1 LED Indicators (continued) LED System (SYS) Alarm (ALM) Description During system power-up: • SYS blinks amber. • ALM is continuous amber. During system boot: • SYS blinks green. • ALM is continuous amber. After bootup: • SYS is continuous green. • ALM is off. During controller image upgrade: • SYS is continuous green. • ALM blinks green. System crash: • SYS is continuous amber. • ALM is off. Firmware Error: • SYS is continuous amber. • ALM is continuous amber. Note Power cycle the controller to clear the firmware error. Internal Voltage Error: • SYS blinks amber. • ALM is continuous amber. Temperature Error: • SYS is off. • ALM blinks amber. Note Check for blocked air vents and fans on the controller, and make sure that ambient room temperature is below 104° F (40° C). 78-18998-01 Cisco 5500 Series Wireless Controller Installation Guide 7