User`s guide

Reading Power Supply Status LEDs
007-4701-003 129
Reading Power Supply Status LEDs
Use the LED located on the front (towards the top) of the power supply to read the
condition of the power supply. Table 5-4 shows the LED status and the power supply
condition that LED status indicates. See “Removing and Replacing Power Supplies” on
page 103 for information on removing and replacing a power supply.
Table 5-4 LED Status and Power Supply Condition
LED Status Power Supply Condition Indicated
Off If your system has one power supply, it indicates that the power supply is not
receiving AC power. If your system has two power supplies, the LED on both
power supplies would be Off, and it would indicate that both power supplies
are not receiving AC power. Power supplies will not be receiving AC power
because either the module is not plugged into power, or an electrical fuse has
blown.
Amber Indicates a fault condition for one of the following reasons:
- In a system where you have two power supplies, one of the power supplies is
not receiving AC power.
- The voltage limit has been exceeded.
- The temperature limit has been exceeded.
- The current limit has been exceeded.
Blinking Green The power supply is receiving AC power, but the main primary DC power has
not yet activated.
Green The power supply is operating properly.