Lenovo 8332 manual Cooling fan faults, Thermal cooling, Symptom, Cause, Action

Cooling fan faults

Table 14. Cooling fan faults

Symptom		Cause		Action
1.	Front panel fault LED amber	1.	Any power fault	1.	Check to ensure DC power to
2.	Audible alarm sounding	2.	A fan failure		cooling fans is correct and that
3.	Fan LED is illuminated				the LED is not illuminated
				2.	Disconnect the PSU from main
					power and remove the faulty fan
					from the system. Re-install. If
					problem persists, replace PSU.
				3.	Reduce the ambient temperature

Thermal cooling

The Secure Managed Client (SMC) - Storage Array uses extensive thermal monitoring to ensure component temperatures are kept low and acoustic noise is minimized. Airflow is from front to rear of the enclosure.

Table 15. Thermal cooling

Symptom	Cause	Action
If the ambient air is cool	The first stage in the thermal	1.	Check the installation for any
(below 25°C or 77°F) and the	control process is for the fans		airflow restrictions at either the
fans are observed to increase	to automatically increase in
			front or rear of the enclosure. A
in speed then some restriction	speed when a thermal threshold
			minimum gap of 2.5 cm (1 inch)
on airflow may be causing an	is reached. This may be caused
			at the front and 5 cm (2 inches) at
additional internal temperature	by higher ambient temperatures
			the rear is recommended.
rise.	in the local environment and may
		2.	Check for restrictions due to dust
Note: This is not a fault condition.	be perfectly normal.
			build up; clean as appropriate.
	Note: This threshold changes
		3.	Check for excessive re-circulation
	according to the number of drives
	and power supplies installed.		of heated air from rear to 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.

Chapter 5. Troubleshooting and problem solving 29