H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 64)

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• The serial port to which the console cable is connected is not the one configured in the emulation
program.
• Terminal settings are incorrect. The required settings are as follows: 9600 bits per second, 8 data
bits, no parity check, 1 stop bit, no flow control, and VT100 for terminal emulation type.
• The console cable is not in good condition.
Illegible characters on the terminal screen
• Check whether the connection of the console cable is loose.
Troubleshooting the power system
Troubleshooting the PSUs
Each PSU (PSR650-A/PSR650-D) has one LED.
• When the LED is solid green, the PSU is working properly.
• When the LED is solid red, the PSU is faulty.
• When the LED is off, the power source is abnormal.
If a PSU does not work normally, possible causes are as follows:
• The power input is abnormal.
• The PSU is overheated.
• The PSU fan is abnormal.
Check the following items:
• The power source switch is on.
• The power cord or power cables are correctly connected.
• The voltage of the power input is correct.
Troubleshooting the fan tray
If the FAN LEDs on the main control board indicate an abnormal condition of the fan tray, check the
following items:
• Whether any fan unit is abnormal.
• Whether the air intake or exhaust is blocked.
• Whether any slot is empty without a blank filler panel installed.
Table 27 Description of the FAN LEDs
LED Status Meaning
Steady on The fans are operating properly. OK
(Green)
Off At least one fan is faulty or out of position.
Steady on At least one fan is faulty or out of position.
FAN
FAIL
(Red)
Off The fans are operating properly.