2U Enclosures Only
• Replace a defective PCM with a fully operational PCM within 24 hours. Refer to “Environment” on page
113. Do not remove a defective PCM unless you have a replacement model of the correct type ready for
insertion.
• Before removal/replacement of a PCM disconnect supply power from the PCM to be replaced. Refer to
“Replacing a Cooling Module” on page 89
Figure 2. PCM Warning Label
5U Enclosures Only
CAUTION:
To prevent overturning, drawer interlocks stop users from opening both drawers at the same time. Do
not attempt to force open a drawer when the other drawer in the enclosure is already open. In a rack
containing more than one enclosure, do not open more than one drawer per rack at a time.
Important: All rear modules are part of the fire enclosure and must only be removed when a replacement
can be immediately inserted.
Important: The enclosure could not receive sufficient airflow or cooling if it is operated with any of the rear
modules missing. It is essential that every module bay is filled either with a module or a blank module.
Figure 3. Module Bay Caution Label (2)
Replace any defective module with a fully operational unit as soon as possible. Do not remove cooling
modules, PSUs, or ESMs unless you have a replacement model of the correct type ready for insertion.
CAUTION:
To prevent overturning, drawer interlocks stop users from opening both drawers at the same time. Do
not attempt to force open a drawer when the other drawer in the enclosure is already open. In a rack
containing more than one enclosure, do not open more than one drawer per rack at a time.
CAUTION:
2
Lenovo Storage D1212/D1224/D3284Hardware Installation and Maintenance Guide
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