P r e f a c e
Figure P-3 PSU/Cooling Module Caution Label:
Do not operate with modules missing. A faulty power supply/cooling module must be replaced with a fully operational module within 24 hours.
To ensure your system has warning of a power failure,
!disconnect the power from the PSU by either the switch (where present) or by physically removing the power source,
Warning prior to removing the PSU from the enclosure.
Do not remove a faulty power supply/cooling module unless you have a correct replacement product ready for insertion.
Figure P-4 PSU Warning Label (Power Hazards)
Always disconnect power to the product prior to removal of the power supply/cooling module from the product chassis.
Provide a safe electrical earth (ground) connection for the power cord.
Provide a suitable power source with electrical overload protection to meet the requirements detailed in the product’s technical specifications.
Do not remove covers from the Power Supply Unit (PSU). The ! is the Danger of electric shock. Return the damaged PSU to
Warning your supplier for repair.
iv | IBM System Storage DCS9550 1S1 Storage Expansion Unit Installation, Service, and User Guide |