--- title: How standard SCS Controller modes work description: Find out how the SCS Controller uses modes to automate changes for touchless control of asset settings such as temperature and power use. --- [Skip to content](https://support.aofrio.com/how-standard-scs-controller-modes-work#main-content) - [English](https://support.aofrio.com/how-standard-scs-controller-modes-work) - [Español - México](https://support.aofrio.com/es-mx/cómo-funcionan-los-modos-estándar-del-controlador-scs) - [Português - Brasil](https://support.aofrio.com/pt-br/como-funcionam-os-modos-padrão-do-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/how-standard-scs-controller-modes-work) - [Español - México](https://support.aofrio.com/es-mx/cómo-funcionan-los-modos-estándar-del-controlador-scs) - [Português - Brasil](https://support.aofrio.com/pt-br/como-funcionam-os-modos-padrão-do-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) July 28, 2025 # How standard SCS Controller modes work ## Find out how the SCS Controller uses modes to automate changes for touchless control of asset settings such as temperature and power use. The SCS Controller has a number of standard modes as follows: --- #### **Normal Mode** When running in Normal Mode, the SCS controller primarily operates to maintain the Set Point Temperature. The range for operational set point is -10.0 to 15.0 °C with a default of 3.5°C. This can be changed in 0.1 °C increments. Normal mode also has parameter settings for the Evaporator fan, Inactivity time (eg when the cooler can move to reduce energy use), Lighting and Display, and temperature alarms. See details for each Normal Mode parameter [here](https://support.aofrio.com/normal-mode-parameters-for-the-scs-controller?hsLang=en). --- #### **Transition Modes** There are three Transition Modes in the SCS Controller. These are used to minimize 'Pull down' times and are most useful if the retail outlet opening hours vary, or if customer demand varies (eg seasonal demand for cool drinks, ice cream etc), such that a regular Pulldown time is uncertain. See details for Transition Mode parameters [here](https://support.aofrio.com/parameters-for-the-scs-controller-in-transition-mode?hsLang=en). 'Pull down' time is how long it takes to reduce the temperature of a product being stored outside a cooler to the final 'chilled' temperature. eg a cold drink being moved from ambient or room temperature storage to a cooler. --- #### **Standby Modes** Standby is an intelligent method to save power when a cooler is not being accessed by customers, e.g. outside of normal business hours. The SCS can manage when the cooler moves to standby mode to minimize the pull down time. Within Standby Mode, AoFrio also offers a specific mode for perishables for certain food stuffs and medicines, such as those under HACCP regulations that require a set temperature at all times. See details for each Standby Mode parameter [here](https://support.aofrio.com/parameters-for-the-scs-controller-in-standby-mode?hsLang=en). See also: - [How the SCS Controller can be programmed to save power overnight](https://support.aofrio.com/infographic-how-the-daily-cycle-works-for-the-scs-controller?hsLang=en) - [How the SCS Controller can save power when the outlet is closed for several days](https://support.aofrio.com/infographic-how-the-scs-controller-can-save-power-when-the-outlet-is-closed-for-several-days?hsLang=en) --- #### **Defrost Modes** A Defrost Cycle can be initiated or terminated by either time or temperature. During the Defrost Cycle the Normal Operational Mode is overridden to control the Compressor, Evaporator Fan, Lights, and if used, any valves or heater elements connected to the Relay. Supported Defrost Cycle methods are: - hot gas defrost (reverse cycle) - ambient defrost (with the compressor turned off) - forced defrost (with an electric heater element). These parameters provide the options to control and configure the Defrost Cycle. AoFrio also offers a number of advanced Defrost parameters. See details for each Defrost Mode parameter [here](https://support.aofrio.com/parameters-for-the-scs-controller-in-defrost-mode?hsLang=en). --- - [Support for your role](https://support.aofrio.com/support-for-your-role?hsLang=en#main-content) - [Service technician](https://support.aofrio.com/support-for-your-role?hsLang=en#service-technician) - [Hardware installer](https://support.aofrio.com/support-for-your-role?hsLang=en#hardware-installer) - [OEM buyer or engineer](https://support.aofrio.com/support-for-your-role?hsLang=en#oem-buyer-or-engineer) - [Fleet manager](https://support.aofrio.com/support-for-your-role?hsLang=en#fleet-manager) - [Food Safety manager](https://support.aofrio.com/support-for-your-role?hsLang=en#food-safety-manager) - [Optimise energy use](https://support.aofrio.com/support-for-your-role?hsLang=en#optimise-energy-use) - [Software & Firmware releases](https://support.aofrio.com/software-firmware-releases?hsLang=en#main-content) - [Release notifications](https://support.aofrio.com/software-firmware-releases?hsLang=en#release-notifications) - 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