Power Supply/Fan - Honeywell LC13-510 Manual

3.3.1 Power Supply/Fan

No LEDs are on.
• Check that the power cord is plugged in and that the power switch is on. If they are,
unplug the power cord and replace the power supply.
The red LED in the Power Status panel is on but the
• Unplug the power cord and replace the power supply.
LED is on.
FAN ALARM
Keep fingers and other objects clear of fans. They have rotating parts and sharp fan blades.
The Fan Assembly in the Dual Node Module is wired to both power supply connectors. It
will operate if either (or both) of the power supplies are turned on. Therefore, if the
module contains two power supplies, you must turn both power supplies off in order to
turn the Fan Assembly off.
• With power applied to the node, loosen the two quarter-turn bail-headed fasteners
holding the fan assembly, and quickly slide the assembly out of the module. If the fans
are functioning properly, they will remain turning for a few seconds. After the fans
have stopped, check for bearing drag by attempting to rotate the blades with your
fingers. In order to prevent overheating of the node, do not leave the fan assembly out
of the module for than two minutes while performing this diagnosis.
• If either or both fans are not turning, or if the bearings are dragging (if there is any
noticeable resistance to turning), replace the fan assembly. If you do not have a
replacement fan assembly with you, put the faulty unit back in while obtaining a
replacement (assuming that the faulty unit is partially functional). This will provide
some cooling.
• If the problem is still not corrected, check the fan power connector at the backplane. If
no problems are observed, replace the power supply.
Dual Node Module Service
FAN ALARM
W A R N I N G
3-5
3.3.1
LED is off.
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