Service Manual

Power supply unit indicator codes
AC power supply units (PSUs) have an illuminated translucent handle that serves as an indicator. The indicator shows if power is
present or if a power fault has occurred.
Figure 102. AC PSU status indicator
1. AC PSU status indicator/handle
Figure 103. AC PSU status indicator
1. AC PSU status indicator/handle
Figure 104. AC PSU status indicator
1. AC PSU handle
2. Socket
3. Release latch
Table 90. AC PSU status indicator codes
Power indicator codes Condition
Green Indicates that a valid power source is connected to the PSU and the PSU is operational.
Blinking amber Indicates an issue with the PSU.
Not powered on Indicates that the power is not connected to the PSU.
Blinking green Indicates that the firmware of the PSU is being updated.
CAUTION: Do not disconnect the power cord or unplug the PSU when updating
firmware. If firmware update is interrupted, the PSUs do not function.
144 System diagnostics and indicator codes