User Service Guide, Fourth Edition - Server Expansion Unit

Chapter 4
Troubleshooting
Common Installation Problems
26
PCI Power Supply LEDs
There are three LEDs on the PCI power supply. The green power LED reports overall power status for the
PCI power supply. The yellow attention LED is not currently used for status. The multi-colored fault LED
reports faults and warnings.
Figure 4-3 PCI Power Supply LED Locations
Table 4-3 PCI Power Supply LEDs
LED Driven By State Description
Power Each supply On Green All output voltages generated by the power
supply are within limits.
Off Power to entire system has been removed.
Attention MP through PCI
LPM
a
a. LPM stands for local power monitor.
Yellow Not currently used for status.
Fault Each supply Flash Yellow The temperature within the power supply is
above the lower threshold.
On Yellow The temperature of the power supply is
approaching the thermal limit.
Flash Red Power supply has shut down because of an over
temperature condition, a failure to regulate the
power within expected limits, or a
current-limit condition.
Off Normal operation.
Power Attention Fault