Chapter 3 Servicing and upgrading a PFC 500/E
42
PFC 500/E Instruction Manual
2 December 1999
Handling CRUs
This section describes the precautions that you must take and the general procedures
you must follow when removing, installing, and storing CRUs.
Power issues and CRUs
The PFC500/E is designed for continuous operation and to be hot repairable. It should
always be powered up. You should replace any disk module, redundant RC,
redundant power supply, or the fan pack while the PFC 500/E is running.
Its front door should be closed and each of its compartments should contain a CRU or
filler panel to ensure EMI compliance and proper air flow over the CRUs.
While the PFC500/E is powered up, you can service or replace any CRU. You should
not remove a faulty CRU until you have a replacement available.
IMPORTANT: You can remove the drive fan pack while the PFC500/E is powered
up. While the pack is removed, the Cooling check light on the power supply flashes.
If the pack is removed for more than 2 minutes, the disk modules power down and
the each RC goes into standby mode. When you reinstall the drive fan pack, the disk
modules power up and each RC goes into active mode.
Since you can replace or add any CRU without sliding the PFC500/E out of the
cabinet, you do not have to use cabinet anti-tip devices when you upgrade or service
an PFC 500/E.
If you need to power down an PFC 500/E, refer to the power down procedure on
page 38.
Avoiding electrostatic discharge (ESD) damage
When you replace or install CRUs, you can inadvertently damage the sensitive
electronic circuits in the equipment by simply touching them. Electrostatic charge that
has accumulated on your body discharges through the circuits. If the air in the work
area is very dry, running a humidifier in the work area will help decrease the risk of
ESD damage. You must follow the procedures below to prevent damage to the
equipment.
IMPORTANT: Read and understand the following instructions.
• Provide enough room to work on the equipment. Clear the work site of any
unnecessary materials or materials that naturally build up electrostatic charge, such
as foam packaging, foam cups, cellophane wrappers, and similar items.
• Do not remove replacement or upgrade CRUs from their antistatic packaging until
you are ready to install them.
• Gather together the ESD kit and all other materials you will need before you
service an PFC500/E. Once servicing begins, you should avoid moving away from
the work site; otherwise, you may build up an electrostatic charge.
• Use the ESD kit when handling any CRU. If an emergency arises and the ESD kit
is not available, follow the procedures in the “Emergency procedures (without an
ESD kit)” section.
