Instruction Manual

D Cus tomer repl aceabl e units
This appendix describes the procedures for replacing CRUs. Information about initial enclosure
installation, ESD protection, and common replacement procedures is also presented.
ESD protectio
n
When you repla
ce a CRU, you must take precautions to prevent the possibility of electrostatic discharge
(ESD) damaging sensitive electronic items.
1. Always transport and store CRUs in an ESD protective enclosure.
2. Do not remove
the CRU from the ESD protective enclosure until you are ready to install it.
3. Always use ESD precautions, such as a wrist strap, heel straps on conductive flooring, and an
ESD protective smock when handling ESD sensitive equipment.
4. Avoid touch
ing the CRU connector pins, leads, or circuitry.
NOTE:
Do not place
ESD generating material such as paper or non anti-static (pink) plastic in an ESD
protective enclosure with ESD sensitive equipment.
Common replacement procedures
The following procedure is common to all CRU replacement procedures.
CAUTION:
The hotpluggable power supplies, blowers, and drives DO NOT require halting Fibre Channel data
transfers.
Replacing a pluggable I/O module, transceiver, or a fiber cable always interrupts data transfers
on the Fibre Channel loop.
Review the controller documentation to determine if replacing an I/O module, transceiver or fiber
cable requires removing power.
1. Always im
plement all the ESD protection procedures.
2. Disconnect external cables from the CRU and make note of the connection.
3. Remove the defective CRU from the enclosure.
4. Remove t
he replacement CRU from the ESD protective enclosure. Check the label to ensure that the
CRU is a compatible replacement (see Figure 67).
5. AligntheCRUwiththeenclosureguideslots.
6. Reconn
ect external cables to restore external connections.
7. Slide the CRU into the enclosure until the CRU is against the backplane connector.
8. Fully seat the CRU in the enclosure and verify that the CRU is operating properly.
9. Place the defective CRU in the ESD protective enclosure for shipment.
Enterprise Virtual Array 3000/5000 user guide (VCS 3.110)
159