User guide

Enclosure User Guide
54
4.5.2 Power Supply Faults
Symptom Cause Action
1 Ops Panel SYSTEM
FAULT LED AMBER
2 An AMBER LED on
one or more Power
Supply modules.
3 Audible Alarm
sounding.
1 Any power fault.
2 A fan failure.
3 A thermal
condition which
could cause PSU
overheating.
4 Fault: on one of
the following
modules:
– PSU
– Cooling
– FC60SS RAID
5 Removal of 1
PSU
1 Check AC power connections to Power
Supply module are live.
2 Disconnect the Power Supply module from
AC power and remove the module from the
system, Re-install: if problem persists,
replace Power Supply Module.
3 Reduce the ambient temperature.
4 Replace faulty module as appropriate:
– PSU
– Cooling
– FC60SS RAID
4.5.3 Thermal Control
FC60SS enclosures use extensive thermal monitoring and take 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
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 modules are in
place.
5 Reduce the ambient temperature.