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48 CHAPTER 4: PROBLEM SOLVING
If a fan failure warning message is generated:
1 Power off the unit.
2 Check that the air vents are not obstructed.
3 Power cycle the unit. To do this, remove and reconnect the AC mains
supply.
4 If a fan fail trap is still received, return the unit.
An SNMP thermal shutdown trap and email is received
1 Power off the unit.
2 Check that the air vents are not obstructed.
3 Check that the ambient temperatures and environmental conditions meet
those specified in Appendix C
.
4 Power cycle the unit. If a further thermal shutdown trap is received,
return the unit.
Unit fails or SNMP thermal shutdown trap is received
1 Power cycle the unit. To do this, remove and reconnect the AC mains
supply.
2 Check the command line interface (system summary command) to
determine whether a thermal shutdown has occurred.
3 If no, return the unit:
If yes, check that:
■ The air vents are not obstructed.
■ The ambient temperatures and environmental conditions meet those
specified in Appendix C
.
4 Power cycle the unit. If a further thermal shutdown occurs, and all
environmental conditions are satisfactory, return the unit to 3Com.
dua1740-0aaa03.book Page 48 Thursday, December 23, 2004 9:23 PM