Tandberg Data Storage Library T128, User Manual

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Tandberg StorageLibrary T128 User’s Guide 161
Power Supply LEDs
RAS tickets typically report all problems related to power supplies. You can also observe the blinking pattern
of LEDs on power supplies to see if the they are functioning appropriately.
Power supply LEDs indicate status by the rate at which they blink. The color of the LED identifies the area
of the component being reported.
Use Table 14 to interpret power supply activity.
In the RAS tickets associated with the defective power supply, record both the number of the module and
the number of the power supply connected to that module.
The 9U expansion modules are numbered according to their position in relation to the 5U control module.
The 5U control module is assigned the number 0. A 9U expansion module stacked beneath the control
module is assigned a negative number, while a 9U expansion module stacked above the control module is
assigned a positive number. For example, 9U expansion module -1 is beneath the control module, while 9U
expansion 1 is above the control module.
Each module can have up to two power supplies. The power supply on the left is #1, while the power supply
on the right is #2.
Table 14 Power Supply LEDs
LED Color Represents Power Supply Status
Green AC OK
(top) • Solid on — The power supply’s AC input is above the minimum
requirements to operate.
• Solid off — The power supply’s AC input is below the minimum
requirements to operate.
Green DC OK
(middle) • Solid on — The power supply’s output voltage is within regulation.
• Solid off — The power supply’s output voltage is not within regulation.
Blue Standby
(bottom) • Solid on — Swap mode: Ready to be removed or replaced.
• Solid off — Normal.