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Operation
LED Locations
The Symbio controllers have the following LEDs located on the front (refer to the following illustration):
• Marquee LED
• Communication Status LEDs and IMC Status LEDs
• Service Button LED
• Binary Output Relay (3)/TRIAC (9) Status LEDs
Figure 17. Symbio 500 LED locations
LED Descriptions, Activities, and Troubleshooting
The following table provides a description of LED activity, an indication or troubleshooting tip for each,
and any relative notes.