HP ProLiant DL380 Server - Manual (Page 18)

Component identification 18
Status
On = AC power is connected.
Off = AC power is disconnected.
Missing = Riser cage is not installed, or power might not be
connected.
FBWC module LEDs (P222, P420, P421)
The FBWC module has three single-color LEDs (one amber and two green). The LEDs are duplicated on the
reverse side of the cache module to facilitate status viewing.
1 - Amber 2 - Green 3 - Green Interpretation
Off Off Off The cache module is not powered.
Off
Flashing 0.5 Hz Flashing 0.5 Hz The cache microcontroller is executing from within its
boot loader and receiving new flash code from the host
controller.
Off Flashing 1 Hz Flashing 1 Hz The cache module is powering up, and the capacitor
pack is charging.