Maintaining The Power System; Types Of Power System Problems; Recover From A Power Supply Shutdown - IBM F10 Service Manual

Maintaining the Power System

The power supply FRUs have "hot swap" capability. They do not require preventive
maintenance.

Types of Power System Problems

Power problems include any malfunctions that delay or interrupt power distribution
to the drive module and its components. This includes both external and internal
power problems such as power outages or a failure of the power connections to the
drive module's midplane. All power system failures are caused by some type of
hardware problem, either in the incoming power lines, the building's wiring, the
cabinet's electrical system, or in the drive module circuitry. Some electrical
problems are difficult to trace, especially if it involves complex site wiring in a large
facility.
You can use several tools to help determine the source of a power problem,
including:
v Drive module LEDs
v Software error messages
v Troubleshooting chart (see "Drive Module Troubleshooting Chart" on page 198 for
Hardware-Related Problems
Problems involving the hardware components in the drive module's power system
might include:
v Loose or damaged connectors or power cords
v Overheated or defective power supply
v Midplane failure
v Failure of electrical circuits inside the cabinet
v Power failure in the building or other external electrical source

Recover from a Power Supply Shutdown

Problem Indicators
There may be a problem with one or both power supplies due to overheating,
incorrect voltages, or other electrical failures when one or both of the following
occurs:
v One or both power supply LEDs are off
v There is power to the other devices in the cabinet, but not to the drive module
Instructions
Use this procedure to regain normal system operation after a power supply
shutdown. For more information on the power supplies, refer to "Power Supply
FRUs" on page 149.
1. Read the information in "Power Supply Recovery Notes" on page 179.
2. If applicable, remove the panels (or open the doors) on the cabinet to gain
180
IBM 2102 Model F10 and Model D00 Service Guide
detailed troubleshooting information)
access to the drive module.