Cru Replacement For 2U Chassis; Replacing A Power Cooling Module; Removing A Pcm - Lenovo ThinkSystem DS Series Hardware Installation And Maintenance Manual

• Use a portable field service kit with a folding static-dissipating work mat.
If you do not have any of the suggested equipment for proper grounding, have an authorized technician install the
part. For more information about static electricity or assistance with product installation, contact
support.lenovo.com, select Product Support and navigate to Storage Products.

CRU replacement for 2U chassis

NOTE: Unless noted otherwise within a passage pertaining to a particular CRU, the replacement procedure
should be completed within two minutes of the removal of the defective module.

Replacing a power cooling module

This section provides procedures for replacing a failed power cooling module (PCM). Illustrations in PCM
replacement procedures show rear panel views of the enclosure, with the PCM properly oriented for insertion into
the rear panel of the enclosure.
A single PCM is sufficient to maintain operation of the enclosure. You need not halt operations and completely
power-off the enclosure when replacing only one PCM; however, a complete orderly shutdown is required if
replacing both units simultaneously.
CAUTION: Do not remove the cover from the PCM due to danger from electric shock inside. Return the PCM
to your supplier for repair.
See CAUTION bullets regarding electrostatic discharge and anti-static protection on
TIP: The illustrations show PCM module replacement within the right slot as you view the enclosure rear panel.
To replace a PCM in the left slot, you would first rotate the module 180º about its longitudinal axis, so that it
properly aligns with its connectors on the back of the midplane. See also

Removing a PCM

CAUTION: Removing a power supply unit significantly disrupts the enclosure's airflow. Do not remove the
PCM until you have received the replacement module. It is important that all slots are filled when the enclosure is
in operation.
Before removing the PCM, disconnect the power from the PCM by either the mains switch (where present) or by
physically removing the power source in order to ensure your system has warning of imminent power shutdown. A
faulty PCM must be replaced by a fully operational PCM within 24 hours. Ensure that you correctly identify the
faulty PCM before beginning the step procedure.
1. Stop all I/O from hosts to the enclosure. See also
TIP: This step is not required for hot-swapping. However, it is required when replacing both PCMs at
once.
2. Use management software to shut down any other system components necessary.
Figure 16 (page
"Stopping I/O" (page 128).
page 116.
27).
CRU replacement for 2U chassis 117