Soltech SFC4254T, Руководство по установке оборудования

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Chapter 5 Hardware Fault Analysis
The part describes how to remove the fault from the switch.
5.1 Fault Separation
The key for resolving the systematic faults is to separate the fault from the system. You can com
pare what the system is doing with what the system should do to detect the fault. You need to ch
eck the following subsystems:
• Power and cooling systems—power and fan
• Port, cable and connection—ports on the front template of the switch and the cables connecti
ng these ports
5.1.1 Faults Relative with Power and Cooling System
Do the following checkups to help remove the fault:
• When the power on-off is at the “ON” location, check whether the fan works normally. If the fa
n does not work well, check the fan.
• If the switch is too hot, check whether the air outlet and air inlet are clean and then do relative
operations in section 2.3 “Requirements for Common Locations”. The working temperature of
the switch is from 0 to 40 Celsius degrees.
• If the switch cannot be started and the PWR LED is off, check the power.
5.1.2 Faults Relative with Port, Cable and Connection
Do the following checkups to help remove the fault:
• If the port of the switch cannot be linked, check whether the cable is correctly connected and
whether the peer connection is normal.
• If the power on-off is at the “ON” location, check the power source and the power cable.
• If the console port does not work after the system is started up, check whether the console po
rt is set to a baud rate of 9600 bps, eight data bits, no sum check bit and one stop bit.
5.2 LED Description
The LED indicator shows that the switch is running. The following table shows the indicators of t
he SFC4254T switch and their description:
No. Abbrev. Name Remarks
1 PWR Power LED
If the switch is powered on, the indicator is on.
2 SYS System LED
If the indicator is always on, the system is being
started.
If the LED flickers, the system works normally.
3 LINKACT
Indicator at the top
of each port
If the LED is always on, the link on the port is normal.
If the LED is off, the port is not connected.
SFC4254T Hardware Installation Manual