--- title: Standard operation for the SCS 600 Controller description: How the SCS Controller works under normal conditions. --- [Skip to content](https://support.aofrio.com/standard-operation-for-the-scs-controller#main-content) - [English](https://support.aofrio.com/standard-operation-for-the-scs-controller) - [Español - México](https://support.aofrio.com/es-mx/operación-estándar-para-el-controlador-scs) - [Português - Brasil](https://support.aofrio.com/pt-br/operação-padrão-para-controlador-scs) English Show submenu for translations ![](https://support.aofrio.com/hs-fs/hubfs/e7b764c0-c89a-4e26-92a2-ab6256f23c6a_medium.png?width=100&height=75&name=e7b764c0-c89a-4e26-92a2-ab6256f23c6a_medium.png) Open main navigation Close main navigation - - [English](https://support.aofrio.com/standard-operation-for-the-scs-controller) - [Español - México](https://support.aofrio.com/es-mx/operación-estándar-para-el-controlador-scs) - [Português - Brasil](https://support.aofrio.com/pt-br/operação-padrão-para-controlador-scs) English Show submenu for translations - Contact us Contact us How can we help you? - There are no suggestions because the search field is empty. 1. [Help Center](https://support.aofrio.com/?hsLang=en) 2. [IoT hardware operation & behavior](https://support.aofrio.com/iot-hardware-operation-behavior?hsLang=en) 3. [SCS Controller](https://support.aofrio.com/iot-hardware-operation-behavior?hsLang=en#scs-controller) February 18, 2026 # Standard operation for the SCS 600 Controller ## How the SCS 600 Refrigeration Controller works under normal conditions. The SCS 600 Refrigeration Controller offers a variety of asset control options through its front display panel and connected AoFrio software such as [Field](https://support.aofrio.com/field-app-software-overview?hsLang=en) and [Track](https://support.aofrio.com/track-app-software-overview?hsLang=en) app. Options can be assigned according to role type through AoFrio's [User Manager](https://support.aofrio.com/user-manager-software-overview?hsLang=en) software (e.g. energy performance measurements for service technicians). The front display panel (*pictured below*) has a number of LED indicator signals: - (1) Night mode activated - (5) Bluetooth connection activated (e.g. via a verified connection to a nearby mobile device with AoFrio software) - (2) [Current controller mode](https://support.aofrio.com/how-standard-scs-controller-modes-work?hsLang=en) displayed as three letters. - (8) Alarm activated - (9) Compressor connected - (10) Defrost Mode indicator - (11) Fan connected You can use the arrow buttons to [manually change modes and activate, or cancel, settings](https://support.aofrio.com/update-settings-manually-on-your-scs-controller?hsLang=en): - (3) Back, Abort & Night Mode - (4) Scroll up - (6) Next, Enter & Defrost Mode - (7) Scroll down ![frontdisplay](https://support.aofrio.com/hs-fs/hubfs/frontdisplay.jpg?width=670&height=385&name=frontdisplay.jpg) Find out more: - [Update settings manually on your SCS 600 controller](https://support.aofrio.com/update-settings-manually-on-your-scs-controller?hsLang=en) - 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