Overview - Danfoss Icon2™ App and Firmware Versions

Danfoss Icon2™ App software

ReleaseVersionsDateImprovements
1.01.1.1Application 7,10,17 and 20 actuators used for changeover are not shown as available for rooms
1.1.2Bug fixes and performance improvements
1.1.3Fixes an issue with the wrong conversion factor of ZigBee signal in the network test.
1.1.4Fixes a bug in some translations and links to Privacy Policy. Adds updated functionality in Demo mode.
1.1.5Implement Czech language; Privacy Policy in Polish fixed; Added Uninstall Repeater functionality
1.1.6Fixed uninstall repeater functionality if there is more than one repeater
1.1.7Updated Privacy Policy URL. Added new image for Wired RT in Configure Room screen. Fixed app does not reconnect to MC after OTA, pairing alert is shown constantly now.
1.1.8Bug fixes. Serial number and HP optimizer status added to handover report. Updated handling of Danfoss Identity Profile logon.
1.1.9Temperature setpoint refresh for room overview. Minor updates to graphical layout. Minor bug fixes and improvements. Update for demo mode.
1.1.10Minor UI related updates. Stability improvements. Improved QR scanner.
1.21.2.0QR code scanner optimization. Support for 3rd party repeaters. Join repeaters and RTs without QR code.
1.2.1Added Spanish language support.
1.31.3.0Multi controller system support. Installation steps optimisation. Network test improvements.
Improvement to flow of adding RTs: if installer leaves Main MC and Bluetooth connection is lost, and he returns within range, then connection will auto-connect. Improvement to commissioning of a new building: clearer description of difference between Single vs Multi MC.
1.3.1Improvements to MMC configuration. Network test improvement. Technical drawings with legends.
1.3.3Change to the format of the installation report which is stored locally on the Main Controller. Bug fix to the network test related to when the installation uses multiple ZigBee repeaters. Various other smaller improvements. Android specifically: Bug fix related to when the user wants to connect a ZigBee Repeater to the Main Controller.
1.3.42025-06-23Improvements to the network test: A progress bar informs about the test status for each device. Possibility to retest a single device by pressing it when the result icon is visible. When all results are green, a new summary page is shown with the overall test result. Test result icons have been updated. Explanation of the Main Controllers Blinking Patterns is now available from the main app page under the (i) button. Included a warning of the importance for specific firmware updates. Included reminder not to restart the main controller during firmware updates. Included new animations to better explain user actions and behavior of the main controller. Bug fixes to avoid situations where a room thermostat is not connected to an output/room. General bug fixes.
1.3.52025-07-03Included animations to the firmware update flow: Transfer of update file, Installation of the new firmware, Controller is restarting. Activate Bluetooth if controller did not do it after firmware update. During Multi MC firmware update, recommend to factory reset controller after the update. When user opens Icon2 App, it will check automatically if there is a new app version available and if so, recommend updating. Various bug fixes. Compatibility for Android 15.
1.3.62025-08-06Stability improvements. New visual presentation of blinking patterns. Updated technical drawings for the applications. If user has a problem adopting secondary MCs, app will suggest "common issues". When network test results were not all green, app will after 2nd test suggest adding ZigBee repeater. Bug fix related to network test result. Visual improvements to menu bar, related to Android 15. (Internal note only!) When a Danfoss employee is logged into the app, it will be possible to see network test results in % also for Repeaters and Secondary Controllers. Latest available public Main controller firmware will be included in the app. New visual presentation of blinking patterns. Updated technical drawings for the applications. If user has a problem adopting secondary MCs, app will suggest "common issues". When network test results were not all green, app will after 2nd test suggest adding ZigBee repeater. On the room overview page, display also secondary MCs under the Repeater section, as they are in fact acting also as repeaters. (Internal note only!) When a Danfoss employee is logged into the app, it will be possible to see network test results in % also for Repeaters and Secondary Controllers.

Firmware versions

ReleaseVersionsDateImprovements
1.141.14Danfoss Icon2 release.
Danfoss Icon2 Main Controller (MC): Added support for naming the Danfoss ZigBee repeater.
Danfoss Icon2 Room Thermostat (RT): Icon 2 RT will display 'Net Err' if a repeater is connected to the system and Icon 2 MC is offline. The default state for Icon 2 RT cooling enabled is set to ON. Before the change, the default state was OFF.
1.221.22 (0.2.6)20/09/2023Danfoss Icon2 Main Controller (MC): Fixed issue with wrong error codes being sent to Ally (fix in Ally still pending). Improved pairing range on ZigBee. Improved stability detection of TWA. Improved handling of power loss to ensure proper storing of system settings. Fixed issue with unwanted offset when using mixing shunt forward line temperature control. Fixed issues where RTs would have a hard time joining the MC (Master Controller) during pairing. Danfoss Icon2 Room Thermostat (RT): Improved RTZ user experience – more responsive user interface with less "busy" moments. Improved RTZ Temperature measurement – more consistency. Fixed Battery drain issue when updating the RTZ firmware (fixed after update). Fixed issue where RT24V would not join MC.
1.461.46 (0.2.8)13/11/2024Danfoss Icon2 Main Controller (MC): Long Join Feature to allow MMC UX flow. Improved Stability (fixed re-starts that were not so visible to the user, but happened anyway). Improved logging for easier support in case of crash. Fixed issue where the RT24V could change room name at Join. Workaround for issue where the network loses its NW ID when a conflict is detected by a repeater. Temperature reporting at rejoin (preventing Ally to show units offline when they are not). Improved stability of temperature reporting in MMC Systems.
1.501.50 (0.2.10)04/12/2024Danfoss Icon2 Main Controller (MC): Fix to avoid that a Secondary MC in a MMC system could enter Idle mode when changing from installation to run mode. Fix of the device ping, which makes that the RT and the MC output blinks at the same time during a ping test. Danfoss Icon2 Room Thermostat (RT): Fix to avoid that the RT reported a wrong setpoint when the panel was activated by a user, which in some cases was sent to Ally instead of the right one (sent few seconds after but maybe lost or coming earlier than the wrong one). The wired RT 24V can now set Child lock locally (the feature was not enabled before).
1.601.60(0.2.12)22/04/2025Danfoss Icon2 Main Controller (MC): Fix to solve a challenge with firmware update of Danfoss ZigBee Repeaters connected to the main controller, to version 1.17. Various other bug fixes.
1.701.70 0.3.12025/08/11Improvements related to cyber security. Stability improvement to prevent unresponsive Icon2™ Main Controller. Stability improvements to Icon2™ ZigBee network. Bug fix to avoid situations where Icon2™ Main Controller would cool down the home during Away mode. Bug fix to the PWM+ heating logic. New blinking patterns: LED1 Black (off) & LED2 blinking Red for 3 sec "Action not allowed". New possible causes: Main Controller cannot try to join Ally Gateway before room thermostats are connected to MC. Main Controller is configured as Single MC, cannot be added as Secondary MC in Multi MC. It should instead be factory reset first. Controller is restarting. LED1 Black (off) & LED2 blinking White. Update of the core software layer. IMPORTANT; MC should not be restarted now!

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