Power Supplies And Power Supply Fan Assemblies - IBM H Series Installation And Service Manual

Power Supplies and Power Supply Fan Assemblies

Notes:
1. The CPU Drawer can have up to two power supplies. You can replace each
power supply separately. The removal and replacement procedures are the
same for each power supply.
2. If the CPU Drawer has two power supplies, each is hot-swappable. If only one
needs to be removed, you do not have to power down the system.
3. Each power supply has a test switch. See "Power Supply Test Switch
Procedure" on page 7-24.
4. If your system has only one power supply, the unused power supply position
must be filled with a power supply blank which must have a power supply fan
assembly attached to it.
5. Do not hot-swap a power supply if the ambient room temperature is greater than
32°C (90°F), as it can cause loss of data or data corruption.
6. Be sure that the replacement power supply is ready to install, as the CPU
Drawer can encounter problems if the power supply is removed for longer than
five minutes.
7. Power supply fans 1 and 2 are located on the primary power supply. Power
supply fans 3 and 4 are located on the secondary power supply. If only one fan
in a fan assembly is bad, the fan assembly must be replaced.
8. You need a 6mm nutdriver to perform this procedure.
Chapter 7. Removal and Replacement Procedures
7-21