FRU replacement
Attention: Read Safety notices and labels before removing or installing
any components. Follow ESD precautions (see ESD precautions whenever
handling FRUs.
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The field replaceable units (FRUs) in the can be removed and replaced without special tools. The switch can continue operating during the FRU replacement if the conditions specified in the procedures are followed.
SFP+ transceiver FRU removal and replacement procedures are described in Installing SFP+ transceivers and connecting cables, as part of the initial switch installation and configuration. Power supply and fan FRU removal and replacement steps are described in the following procedures. The chassis replacement procedure is to be completed by IBM Service personnel only, and cannot be completed while the switch is operating.
Before beginning replacement
The two different models of the have different air flow patterns. The model has port side exhaust (intake on the fan and power supply side), while the model has non-port side exhaust airflow (exhaust on the fan and power supply side) to accommodate specific installation and configuration requirements.
The I symbol indicates an intake unit. This unit pulls air in from the non-port side of the switch and exhausts it out the port side. This is also called back-to-front airflow or reverse airflow. This symbol should appear on FRUs for the model.
The E symbol indicates an exhaust unit. This unit pulls air in from the port side of the switch and exhausts it out the non-port side. This is also called front-to-back airflow or forward airflow. This symbol should appear on FRUs for the model.
The chassisShow command will indicate either "forward" or "reverse" airflow. If one fan fails, the remaining fans go to high speed to maintain proper cooling until the failed fan is replaced.
CRITICAL HIL-1611 MISMATCH in PSU/FAN Air Flow direction.
Replace PSU with fan air flows in same direction.
System will be shut down in 2 minutes.