Intel Server System R1000BB Family

Intel
®
Server System R1000BB Product Family TPS
Revision 2.0 23
When AC voltage is too low, a fast AC loss detection circuit inside each installed power supply asserts an
SMBALERT# signal to initiate a throttle condition in the system. System throttling reduces the bandwidth to
both system memory and CPUs, which in turn reduces the power load during the AC line drop out event.
3.11 Power Supply Status LED
There is a single bi-color LED to indicate power supply status. The LED operation is defined in the following
table.
Table 18. LED Indicators
Power Supply Condition
LED State
Output ON and OK
GREEN
No AC power to all power supplies
OFF
AC present / Only 12VSB on (PS off) or PS in Cold
redundant state
1Hz Blink GREEN
AC cord unplugged or AC power lost; with a second
power supply in parallel still with AC input power.
AMBER
Power supply warning events where the power supply
continues to operate; high temp, high power, high current,
slow fan.
1Hz Blink Amber
Power supply critical event causing a shutdown; failure,
OCP, OVP, Fan Fail
AMBER
Power supply FW updating
2Hz Blink GREEN