Troubleshooting The Cooling Fan - Safran SecureSync 2400 User Manual

tings of the terminal emulator should be configured as 115200, N, 8, 1 (flow con-
trol setting does not matter).
If the terminal emulator program does not display any data when the keyboard
<Enter> key is pressed, either SecureSync is not powered up or there is a prob-
lem with the connection between SecureSync and the PC.
Using a multimeter, ring out the pins from one end of the serial cable to the other.
Verify the cable is pinned as a straight-thru serial cable (pin 2 to 2, pin 3 to 3 and
pin 5 to 5) and not as a null-modem or other pin-out configuration.
Disconnect the serial cable from SecureSync. Then, jumper (using a wire, paper-
clip or car key, etc.) pins 2 and 3 of the serial cable together while pressing any
character on the PC's keyboard. The character typed should be displayed on the
monitor. If the typed character is not displayed, there is a problem with either the
serial cable or with the serial COM port of the PC.
Refer to "Setting up a Terminal Emulator" on page 554
using a terminal emulator software to communicate with SecureSync via serial
port.
5.1.8

Troubleshooting the Cooling Fan

The cooling fan (located on the front panel, to the right of the LED time display)
is a temperature controlled cooling fan. Temperature sensor(s) determine when
the cooling fan needs to turn on and off. It is normal operation for the cooling fan
to not operate the entire time SecureSync is running. It may be turned off for long
periods at a time, depending on the ambient and internal temperatures.
To verify the cooling fan is still operational, power cycle SecureSync unit .
See also: "Temperature Management" on page 323
SecureSync 2400 User Manual
Note: If the internal temperature in the unit is below 30 degrees
Celsius, the fan may not turn on as part of the power-up sequence. In
this case, it is recommended to let the unit "warm up" for approx-
imately 30 minutes, in order to allow the unit to get to the appro-
priate temperature.
APPENDIX
for more information on
359