108Chapter 11 In-service field maintenance for 5Uenclosures
d. Exerting even pressure to the center, gently press it against the midplane until the latch closes and locks
in place.
3. After verifying the connectors are all undamaged, reconnect all cables as they were connected before.
4. Verify that the
Hardware normal
LED is lit green on the replaced CM after properly inserting and seating it in
the empty slot.
5. Facing the front of the storage enclosure, verify that the
Power On
LED is green and there are no fault
conditions.
Replace a 5U fan cooling module
Fan cooling modules (FCMs) provide cooling to storage enclosure modules and components. Each fan
cooling module (FCM) has a green and an amber fault LED to identify various states. The asterisk (*) indicates
a fault condition.
LED Type Color State Status
FCM OK Green
On FCM hardware functioning properly
Off* FCM hardware fault
FCM fault Amber
On*
Fan speed is out of tolerance
Communication with AP controller module (CM) lost
Off FCM hardware functioning properly
Figure 86 Fan cooling module fault LEDs
An important feature of the storage enclosure design is redundancy. The storage enclosure will maintain
continuous operation during the replacement of a single FCM, if it is within the time limit of 7 minutes, since
removal of an FCM significantly reduces airflow in the enclosure.
CAUTION If you remove any FRU while the storage enclosure is powered up, you must replace it with a
tested, good spare within the allotted time for that FRU. If you do not replace the FRU and, when applicable,
fully close the related drawer within the identified time limit, you void the product warranty and the storage
enclosure might overheat, causing equipment failure and possible data loss.
CAUTION Do not remove covers from any FRU. There is a danger of electric shock inside. Return the
FRU to your supplier for repair.
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