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Error messages appear when the fan tray is removed and when the temperature approaches the threshold.

• When a fan tray is removed, the system displays the following message:

00:00:37: %STKUNIT0-M:CP %CHMGR-2-FAN_TRAY_BAD: Major alarm: fan tray 0 in unit 0

is missing or down

• When the temperature reaches the maximum threshold (3), the system displays the following warning

message:

00:00:38: %STKUNIT0-M:CP %CHMGR-2-TEMP_SHUTDOWN_WARN: WARNING! Unit

temperature is current temp;

To replace a fan module, follow these steps:

Step

Task

Loosen the securing screw at the top of the fan module.

CAUTION:

module is not installed in each slot (either as part of the PSU or as an independent fan module), the system powers

down when it exceeds an internal temperature threshold.

Use the grab handle to slide the fan module out of the bay.

Use the grab handle on the replacement fan module to slide it into the bay.

Tighten the captive screws on the replacement fan module. Ensure the fan module is secure.

Install a Fan Filter

Use the fan filters with the reverse (R) flow fan modules and PSU/fan modules only. You can replace

them individually on each fan within the module without powering down a PSU module or disrupting

traffic.

The fan filters and retainers pop into the fan guards on the module. There is no need to unscrew the filter

guard.

To install a fan filter, follow these steps:

Step

Task

Using your fingernail, gently pry the filter retainer off the filter guard.

Remove the filter.

Replace the filter and ensure it is pressed firmly into place. Gently press the filter retainer into the filter guard

until it snaps in.

Repeat for all the fan filters, if necessary.

You must complete steps 2 and 3 within five minutes or the system powers down. If a fan

Fans and Filters