6-1
6
Maintenance and Troubleshooting
Software Loading Failure
If software loading fails, the system still runs the original version. In this case, check whether the
physical interfaces are properly connected:
z
If not, reconnect them correctly and restart the loading procedure.
z
If so, view the loading information displayed on the HyperTerminal to check for input errors. If there
is any input error, restart the loading procedure and ensure the input correctness.
Common input errors include:
z
Fail to set the baud rate of the HyperTerminal to 9,600 bps when loading the software at a baud
rate of 9,600 bps through XMODEM.
z
Enter an incorrect IP address, software name, or path of the TFTP server when using TFTP.
z
Enter an incorrect IP address, software name, username, or password when using FTP.
If software loading fails when there are neither physical connection problems nor input errors, please
contact your agent for help.
Power Supply Failure
You can check whether the AC power system works normally by observing the PWR LED on the front
panel. The PWR LED is ON when the power system works normally. When the PWR LED is OFF, check
whether:
z
The AC power cord is properly connected.
z
The AC power supply meets the requirement.
Configuration System Failure
After the AC is powered on and the system is normal, the booting information will be displayed on the
console terminal. If the configuration system has any faults, illegible characters or nothing will be
displayed on the console terminal.
Troubleshooting when nothing is displayed
If nothing is displayed on the terminal after the AC is powered on, please check whether:
z
The power supply is normal.
z
The console cable is properly connected.
If the above-mentioned items ruled out, the problem may lie in the console cable or the settings of the
terminal (such as HyperTerminal) parameters. Please perform the corresponding check.
Troubleshooting when illegible characters are displayed on the terminal
If illegible characters are displayed at the console terminal, the problem probably lies in the parameter
settings on the terminal (such as HyperTerminal). Verify the following terminal parameter (such as
HyperTerminal) settings:
