Psu Faults; Thermal Monitoring And Control - Quantum QXS G2 Series Hardware Installation And Maintenance Manual

PSU Faults

Table 25 provides PSU faults and the recommended actions.
Table 25 PSU Faults
Symptom
Ops panel Module Fault LED is amber
Fan Fail LED is illuminated on PSU

Thermal Monitoring and Control

The storage system uses extensive thermal monitoring and takes a number of actions to ensure
component temperatures are kept low, and to also minimize acoustic noise. Air flow is from the front
to back of the chassis.
Table 26 provides thermal faults and the recommended actions.
Table 26 Thermal Faults
Symptom
If the ambient air is below
25ºC (77ºF), 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.
Cause
Any power
2
fault
Fan failure
2
Cause
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.
Recommended Action
Verify AC mains connection to PSU are live
Replace PSU
Recommended Action
1 Check the installation for any airflow
restrictions at either the front or back of
the chassis. A minimum gap of 25 mm (1")
at the front and 50 mm (2") 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 front. Use of the chassis in
a fully enclosed rack is not recommended.
4 Verify that all blank modules are in place.
5 Reduce the ambient temperature.
Troubleshoot/Problem Solving 133