S3740F Hardware Installation Manual
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Power and cooling systems
—power and fan
Port, cable and connection
—ports on the front template of the switch and the cables
connecting 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 fan does not work well, check the fan.
The working temperature of the switch is from 0 to 40 Celsius degrees. 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”.
If the switch cannot be started and the PWR indicator 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 port is set to a baud rate of 9600 bps, eight data bits, no sum check bit, one
stop bit and no traffic control.
5.2 Indicator Description
The LED indicator shows that the switch is running. The following table shows the
indicators of the S3740F switch and their description:
No. Abbrev.
Name
Description
1
PWR
Power indicator
When the switch is powered on, the
indicator is on.
2
SYS
System indicator
When the indicator is always on, the
system is being started up.
When the indicator flickers, the
system works well.
