Symbio™ 700 Unit Controller Leds; Led Description Notes - Trane SYMBIO 700 Troubleshooting Manual

Symbio™ 700 Unit Controller LEDS

LED Description Notes

The LEDs for the internal relays along the right-hand side of the Symbio 700 board illuminate
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a solid green color when the relay is energized. The description in the illustration has which
output is active.
LED 3 – Bluetooth is on when Bluetooth is connected and flashes during pairing, otherwise,
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it is off.
LED 7 – Ethernet Activity light is for the Ethernet Port. The light will flash green whenever
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there is network traffic.
LED 8 – Ethernet Link light is also for the Ethernet Port. The light will be solid yellow
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whenever the Symbio 700 board is connected to a router or network switch.
LED 9 – System light is normally a solid light when power is applied and after the boot
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sequence
LED 10 – Alarm Status is normally off unless there is an active alarm then it will flash a red
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light
MODBUS TX/RX – Normally off unless the AHU is configured for SZVAV or multispeed.
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When normally communicating with the VFD, both lights will pulse at the same time with
about a second in between flashes and a couple quick pulses every now and then.
IMC TX/RX – Normally has very fast pulsing almost making the lights look just dim
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