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3-26 Sun StorEdge 5310 NAS Troubleshooting Guide • December 2004
3.2.2 Recovering from an Overheated Power Supply
All modules contain two power supplies, each containing a built-in temperature
sensor designed to prevent the power supplies from overheating. Under normal
operating conditions, with an ambient air temperature range of 5º C to 40º C (40º F to
104º F), the fans in the module maintain a proper operating temperature inside the
module.
If the internal temperature exceeds 70° C (158° F), the power supplies shut down
automatically. If both power supplies shut down because of overheating, the module
has no power and all indicator lights are off.
The following factors can cause the power supplies to overheat:
■ An unusually high room temperature
■ A fan failures
■ Defective circuitry in the power supply
■ A blocked air vent
■ A failure in another device in the command module cabinet
If a fan failure has caused the overheating, the fan Fault lights and the power supply
Fault lights turn on.
If the module temperature exceeds 45° C (113° F), the storage management software
displays a Needs Attention icon in the Array Management Window.
12 Fan Fault Amber Off On “Replacing
a Fan” on
page 7-39
Power Supply
13 Power Green On Off “Replacing
a Power
Supply” on
page 7-41
14 Fault Amber Off On
Link Rate
15 2 Gb/s
Link Rate
Green On Not
Applicable
Not
Applicable
16 Tray ID
Conflict
Amber Off On - Tray
IDs
incorrect
“Setting
the Tray ID
Switch” on
page 3-29
TABLE 3-3 Lights on the Back of a Command Module
Location
Component
Light Color Normal Status
Problem
Status Procedure