Sun Microsystems 817-4054-15, Руководство по обслуживанию

Страница: 115 / 204

Chapter 7 Cooling Subsystem 7-7
7.2 Main Fan Tray
Caution – The fan tray is not hot-pluggable. Attempting to hot-plug the fan tray
while the system is powered on may result in damage. When an overtemperature is
detected, the system shuts down.
Caution –
Use proper ESD grounding techniques when handling components. Wear
an antistatic wrist strap and use an ESD-protected mat. Store ESD-sensitive
components in its ESD safe packaging box before placing them on any surface.
The main fan tray has three LEDs: power, fault, and removal OK. The LEDs are
located on the panel between the two columns of fans.
TABLE 7-4
lists the main fan
tray LED functions.
7.2.1 Removing the Main Fan Tray
1. Take the system to Standby mode.
See Section 4.2, “Taking the System to Standby Mode” on page 4-2 .
2. Remove power to the system by removing the four input power cables, AC0
through AC4 (
FIGURE 1-3
).
3. Open the front doors of the system.
4. Attach a wrist strap. Place a grounded ESD mat close to the system.
See Section 2.8, “Antistatic Precautions” on page 2-6 .
TABLE 7-4
Main Fan Tray LED Functions
LED Name On Off
Activated LED
(green) Device is activated. Device is deactivated.
Fault LED
(amber) Internal fault or failure. No internal fault or failure.
OK to remove
(blue or amber) Fan assembly can be
removed. Fan assembly cannot be
removed.