User Manual

Understanding LEDs
IP-RN 8000 Installation & Commissioning Guide 37
Understanding LEDs
LEDs (light emitting diodes) on the faceplates of modules and units provide status information.
LEDs can take three states:
• Unlit — Indicates the LED or corresponding component is turned off
• Green — Indicates normal operation (or TRUE)
• Red — Indicates a condition that may require attention (or FALSE).
The states of LEDs are documented in relevant sections of this chapter.
The current status of LEDs is remotely available through the AirVista network management system.
Understanding cabinet air flow
Temperature is maintained in the cabinet using a heat exchanger in the front door and a fan unit in the
cabinet. There are two loops of air flow:
• The ambient loop provides air to the heat exchanger at ambient (external) temperature.
• The closed internal loop moves air through the inside of the cabinet.
The heat exchanger controls the temperature of the closed internal loop.
The heat exchanger is pre-installed. The heat exchanger is field-replaceable. Replacing the heat exchanger is
not service disrupting.
See Figure 19
.