Dell R820 owner manual Fan number RPM is less than the lower warning threshold

Error Code	Message Information
		5.	If the issue persists, see Getting Help.
FAN0000	Message	Fan <number> RPM is less than the lower warning threshold.
	Details	Fan operating speed is out of range.
	Action	Remove and reinstall the fan. If the issue persists, see Getting Help.
FAN0001	Message	Fan <number> RPM is less than the lower critical threshold.
	LCD Message	Fan <number> RPM is outside of range. Check fan.
	Details	Fan operating speed is out of range.
	Action	Remove and reinstall the fan. If the issue persists, see Getting Help.
FAN1201	Message	Fan redundancy is lost.
	LCD Message	Fan redundancy is lost. Check fans.
	Details	Fan has failed.
	Action	Remove and reinstall failed fans or install additional fans.
HWC1001	Message	The <name> is absent.
	LCD Message	The <name> is absent. Check hardware.
	Details	The absent device may be necessary for proper operation. System
		functionality may be degraded.
	Action	Reinstall or reconnect the hardware.
HWC2003	Message	The storage <name> cable is not connected, or is improperly
		connected.
	LCD Message	Storage <name> cable or interconnect failure. Check connection.
	Details	The cable may be necessary for proper operation. System
		functionality may be degraded.
	Action	Check if the cable is present, then reinstall or reconnect.
HWC2005	Message	The system board <name> cable is not connected, or is improperly
		connected.
	LCD Message	System board <name> cable connection failure. Check connection.
	Details	The cable may be necessary for proper operation. System
		functionality may be degraded.

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