244. Fasten the captive screw on the fan tray with a Philips screwdriver until the fan tray is securelyseated in the chassis (see callout 2 in Figure 31).If the captive screw cannot be tightly fastened, examine the installation of the fan tray.Figure 31 Installing an LSPM1FAN fan trayIMPORTANT:• At the first login to the switch, use the fan prefer-direction command to set the airflow direction of theswitch to be the same as the airflow direction of the fan tray. If the fan tray has a different airflowdirection than the switch, the system outputs traps and logs to notify you to replace the fan tray.• By default, the switch uses the same airflow direction (power-to-port) as the LSPM1FAN fan tray.Removing a fan trayWARNING!• Take out the fan tray after the fans completely stop rotating.• To avoid an unbalanced fan causing loud noise, do not touch the fans, even if they are not rotating.To remove a fan tray:1. Wear an ESD wrist strap and make sure it makes good skin contact and is well grounded.2. Loosen the captive screw of the fan tray with a Philips screwdriver until it is fully disengaged fromthe switch chassis.3. Grasp the handle of the fan tray with one hand and pull the fan tray part way out the slot. Supportthe fan tray bottom with the other hand, and pull the fan tray slowly along the guide rails out of theslot.4. Put away the removed fan tray in an antistatic bag for future use.Installing/removing a power moduleWARNING!In power redundancy mode, you can replace a power module without powering off the switch but muststrictly follow the installation and procedures in Figure 32 and Figure 33 to avoid any bodily injury ordamage to the switch.
