Appendices
84 S-4000 Digital Snake Owner’s Manual
S-4000S and S-4000H Units: System Status Indicators
Indicator Status Definition Troubleshooting Action
REAC Lit Communication is
established
• None (normal operation)
Dark System power-up • None (normal operation)
Flashing No REAC
communication
• Make sure all REAC devices are turned on
• Check Cat5e cable connections
• Check the Cat5e cable(s) for damage
• Is the proper cable type being used? (See Page
51)
• If a switching hub is used, is it working?
• If a switching hub is used, is it properly
connected? (See Page 53, 76)
• If a switching hub is used, does it have the proper
specification? (See Appendix C)
CTRL Lit RS-232C
communication
established
• None (normal operation)
Dark No device is
connected to
REMOTE jack
• None (normal operation)
Flashing No RS-232C
communication
• Check the RS-232C cable for damage
• Are you using an RS-232C cable with the proper
wiring? (See Appendix B)
• If connected to a computer, is the computer on?
• Is the computer’s RS-232C port functioning
properly?
S-4000S and S-4000H Units: ALARM Indicator
Indicator Status Definition Troubleshooting Action
ALARM Lit Abnormal (high)
temperature
detected
• Make sure the intake and/or exhaust vents on the
unit are not blocked.
• Shut down the unit to prevent overheating and
damage
An exhaust fan (or
fans) has stopped
working
• Shut down the unit to prevent overheating and
damage
NOTE: If ALARM lights, see the S-4000R error indicators for more specific information
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