Sun Microsystems Sun StorEdge T3, Installation, Operation And Service Manual

Page: 112 / 148

5-8 Sun StorEdge T3 Disk Tray Installation, Operation, and Service Manual • July 2000
5.2.2.1 Power and Cooling Unit LEDs
Each power and cooling unit has an AC LED and a power-supply (PS) LED. For
information about the power and cooling unit LEDs and how to interpret them to
diagnose a failure, see Section 4.1.4.2 “Power and Cooling Unit LEDs” on page 4-5.
Note –
Even if the LED indicates a power and cooling unit failure, you should
always verify the FRU status using either the CLI or Component Manager before
replacing the unit. Refer to the Sun StorEdge T3 Disk Tray Administrator’s Guide or Sun
StorEdge Component Manager User’s Guide for more information.
5.2.2.2 Removing and Replacing a Power and Cooling Unit
Caution –
To ensure correct airflow for system cooling, both power and cooling
units must be in the installed position for normal operation. A failed power and
cooling unit should be removed only when a replacement power and cooling unit is
available to be inserted.
Caution –
Replace only one power and cooling unit at a time to prevent system
interruption.
To replace a power and cooling unit:
1. Power off the power and cooling unit by pressing the power switch (
FIGURE 5-5
).
Make sure that the AC LED is amber and the PS LED is off.
2. Disconnect the power cord from the AC outlet.
3. Disconnect the power cord from the power and cooling unit connector by
squeezing both sides of the connector and pulling straight out (
FIGURE 5-5
).
4. Unlock the power and cooling unit by using a coin or small screwdriver to push
in and release the two latch handles (
FIGURE 5-6
).
5. Pull the power and cooling unit out of the disk tray.
Put one index finger through each of the latch handles. With your thumbs on the top
of the chassis for support, pry the power and cooling unit out of its connectors with
an upward rotation. Once it is out approximately .5 inches (2 cm), it will be free to
slide out of the frame on its rails.