Commissioning Mode for UC400 & Symbio 400/500 in TU April 17, 2026 14:13 Updated In the commissioning mode you can override the fan and other end devices: Articles in this section How to Configure field installed Symbio 400/500 Low Airflow or LOCH Symbio™ 400–B/500 Programmable Controllers IOM For Blower Coil, Fan Coil, and Unit Ventilator? A2L FAQ - R454B A2L Sensor for Terminal Products - R454B Adjusting Fan speed - fan balance - Terminal Products with ECM board Air/ Fan balance for ECM controlled direct drive units Autoflow Valves - Test and balance Belimo actuator CQB24-3 - Wired as 3-wire 2 position Belimo Valve and Actuator Parts- Terminal Products See more Related articles LOCH- Fancoil - ECM Troubleshooting Guide LOCH - Blower coil Troubleshooting guide Low Airflow or LOCH Adjusting Fan speed - fan balance - Terminal Products with ECM board Air/ Fan balance for ECM controlled direct drive units