3Com 7000 manual Power Supply, Troubleshooting, family ATM switch power supply

94CHAPTER 8: TROUBLESHOOTING

Table 13 Recommended Action for Common Problems (continued)
Problem	Recommended Action
Interface Card fails	If one of the interface cards fails, use the Initialize Interface (INI) option in the System (SYS)
	menu, Interface (IFC) option to reinitialize the interface. If this fails, you can try to restart
	the whole unit again. If neither of these actions correct the problem you should contact a
	3Com service person.
	When handling modules, always use a wrist strap that is connected to a proper ground.
	This prevents the module from being damaged by electrostatic discharge.
Fans do not rotate	If the fans do not work when the unit is powered up, the fan tray may not be inserted
	properly. Unplug the power cord and reinsert the fan tray properly against the enclosure.

Power Supply		This section discusses common problems related to the CoreBuilder 7000
Troubleshooting		family ATM switch power supply.
Table 14 Problems Related to the Power Supply
Problem	Possible Cause		Recommended Action
CoreBuilder 7000 family	■	The CoreBuilder 7000	1	Check that the power cord is firmly plugged into both
ATM switch not receiving		family ATM switch is		the system and the building’s power outlet.
power		not connected	2	Check that the power cable meets the requirements
		to/receiving external
				described in the Safety Rules section of Chapter 3.
		power.
			3	Restart the system by replugging the power cord.
	■	The power supply
			4	If the problem persists, consider replacing the power
		malfunctioned.
	■	A fuse is blown.		cable, replacing the power supply and checking the
				power supply fuse; the fuse resides within the power
				supply. You have to extract the power supply in order
				to check and replace a fuse.
			5	If the system is still not operating, contact 3Com
				Technical Support or your service person.

Circuit breaker has tripped ■

■

External wiring problem

Power supply failure

1Unplug the power cord of the system.

2Verify that the system is properly connected to AC power with the correct voltage. See Appendix A: CoreBuilder 7000 Family ATM Switch Specifications.

3If the power connection is the problem, replace the cable. If the problem remains, contact 3Com Technical Support.