3Com 3C17700 - SuperStack 3 Switch 4900 Getting Started Manual page 56

56 C 4: P
HAPTER ROBLEM
S
OLVING
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. If the unit has no AC main supply, remove and reconnect the DC
RPS supply.
4 If another fan failure warning message is generated via the Command
Line Interface or the Web interface, return the unit.
Unit fails, no SNMP fan failure message is received
1 Power cycle the unit. To do this, remove and reconnect the AC mains
supply. If the unit has no AC mains supply, remove and reconnect the DC
RPS 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
4 Power cycle the unit. If a further thermal shutdown occurs, and all
environmental conditions are satisfactory, return the unit to 3Com.
Error message indicating that the GBIC transceiver is invalid
The Switch has identified that the GBIC does not meet the minimum
requirements for the Switch and has disabled the port. To correct this
problem, completely remove the GBIC and replace it with a 3Com
approved GBIC. See
Error message indicating that the GBIC transceiver is faulty
To correct this problem, completely remove the GBIC and then reinsert it.
If the problem persists, contact 3Com Technical Support.
C.
"Approved GBIC Transceivers"on page 29.