32 Installation Guide (AA-RVULC-TE, January 2005)

Installing field-replaceable units86

CAUTION: Disassembling any part of the fan assembly voids the part warranty and

regulatory certifications. There are no user-serviceable parts inside the fan assembly.

Because the cooling system relies on pressurized air, do not leave any of the fan assembly

slots empty longer than two minutes while the switch is operating. If a fan assembly fails, leave

it installed in the switch until it can be replaced.

Maintain all three fan assemblies in operational condition to provide redundancy.

Table 24 describes the fan status LED meanings, and corrective actions.

Table 24 Fan status LED behavior

LED Behavior Meaning Corrective action

No light Fan assembly is not receiving power. No action required.

Steady green Fan assembly is operating normally. No action required.

Steady amber for more

than five seconds

Fan fault for one of the following

reasons:

• One or more of the fans in the fan

assembly has failed.

• The fan FRU was disabled by the

user.

Verify that the fan FRU is enabled. If the

fan FRU is enabled, the FRU is faulty and

should be replaced.