Replace a Power Supply

The controller will support two power supplies, supplying hot-pluggable power redundancy. The system distributes the power load across both power supplies to maximize efficiency. When a power supply is removed with the system powered on, the full power load is picked up by the remaining power supply.

Each power supply has a single bi-color LED to indicate power supply status, as described in power supply status LED indicator patterns.

Table 1. Power supply status LED indicator patterns

Power supply condition	Description
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 blinking green
AC power cord unplugged or AC power lost. With a 2nd PS in parallel still with AC input power	Amber
Power supply warning events where PS continues to operate - high temp, high power, high current, and slow fan	1Hz blinking amber
Power supply critical event causing a shutdown, failure, OCP, OVP, fan fail	Amber
Power supply firmware updating	2Hz blinking green