User guide

Galaxy 55 User Guide
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4.5.2 Power Supply/Cooling Faults
4.5.3 Thermal Control
The Galaxy 55 Enclosure uses extensive thermal monitoring and takes a number of actions to ensure component
temperatures are kept low and also to minimize acoustic noise.Air flow is from front to rear of the enclosure.
Symptom Cause Action
1 Operator Panel Power
Supply/Cooling LED
AMBER (~ and Fan
Symbol).
2 An AMBER LED on one
or more Power Supply/
Cooling Modules.
3 Audible Alarm Sounding.
1 Any power fault.
2 A fan failure.
3 A thermal condition
which could cause PSU
overheating.
1 Check Power On/Off Switch on rear of
Power Supply/Cooling module is
switched ON.(not accessible on later
models)
2 Check AC Mains Connections to Power
Supply/Cooling module is live.
3 Check PSU Voltage Range Selector
switch is correctly set.
4 Disconnect the Power Supply/Cooling
module from mains power and remove
the module from the system, Re-install: if
problem persists, replace Power Supply/
Cooling Module.
5 Reduce the ambient temperature.
Symptom Cause Action
If the ambient air is cool (below
25 °C) and the fans are
observed to increase in speed
then some restriction on airflow
may be causing additional
internal temperature rise.
Note: This is not a fault
condition.
The first stage in the thermal
control process is for the fans to
automatically increase in speed
when a thermal threshold is
reached. This may be caused by
higher ambient temperatures in
the local environment and may
be perfectly normal.
Note: This threshold changes
according to the number of
drives and power supplies fitted.
1 Check the installation for any airflow
restrictions at either the front or rear of
the enclosure. A minimum gap of 25mm
at the front and 50mm at the rear is
recommended.
2 Check for restrictions due to dust build-
up, clean as appropriate.
3 Check for excessive re-circulation of
heated air from rear to the front, use in a
fully enclosed rack installation is not
recommended.
4 Check that all Blank plates/modules are
in place.
5 Reduce the ambient temperature.