APC 15000 RAID manual Dealing with Hardware Faults, Thermal Alarm, Thermal Shutdown

				Drive Enclosure Troubleshooting
8.5.2 Thermal Alarm
	Symptom	Cause		Action
	• Display Panel PCM/	If the internal temperature	1	Check local ambient environment
	Cooling Fault LED.	measured in the airflow		temperature is below the upper 40°C
		through the enclosure exceeds		specification.
	• An AMBER LED on	a pre-set threshold, a thermal	2
	one or more PCMs.	alarm will sound.		Check the installation for any
				airflow restrictions at either the
	• Audible Alarm			front or rear of the enclosure. A
	Sounding.			minimum gap of 25mm at the front
				and 50mm at the rear is
	• Air temperature			recommended.
	exiting PCM above		3
	35°C.			Check for restrictions due to dust
				build-up. Clean as appropriate.
			4	Check for excessive re-circulation
				of heated air from rear to the front.
				Use in a fully enclosed rack
				installation is not recommended.
			5	If possible, shutdown the enclosure
				and investigate the problem before
				continuing.

8.5.3Thermal Shutdown

Important An enclosure will shut down when a critical temperature threshold is exceeded in order to prevent permanent damage to the disk drives.

8.6 Dealing with Hardware Faults

Ensure that you have obtained a replacement module of the same type before removing any faulty module.

Warning If the drive enclosure subsystem is powered up and you remove any module, replace it immediately. If the subsystem is used with modules or module blanks missing for more than a few minutes, the enclosure can overheat, causing power failure and data loss. Such use will invalidate the warranty.

•Replace a faulty drive with a drive of the same type and equal or greater capacity.

•All the supplied plug-in PCMs, electronics modules, and blank modules must be in place for the air to flow correctly around the cabinet.

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