Here you can find answers to the most common error codes about our systems by clicking on the links below. If you do not find the answers you are looking for, you are of course welcome to send us an email. We will reply to you as soon as possible.
| Roth Minishunt Wireless | Error code | Description | Action |
| Single Zone Main Controller | Power LED flashing | No connection with thermostat > 20 mins. | Replace batteries or move thermostat closer to main controller. |
| Roth Touchline® SL Plus room thermostat | "UnA" | When the temperature cannot be set | Register the thermostat |
| "Err" | When registration failed | Try to register again | |
| "err" | When an error occurred during calibration | Try to calibrate again – don’t touch the front of the thermostat while calibrating | |
| "--.-%" | When the humidity sensor is damaged | Thermostat must be replaced | |
| "--.-*" | When the temperature sensor is damaged | Thermostat must be replaced |
| Roth Minishunt Plus Wireless | Error code | Description | Action |
| Single Zone Main Controller | Power LED flashing | No connection with thermostat > 20 mins. | Replace batteries or move thermostat closer to main controller. |
| Touchline PL® thermostat | "---" | When the temperature cannot be set | Register the thermostat |
| "Err" | When registration failed | Try to register again | |
| "Lo " | When low battery | Change battery within shortly | |
| Roth advanced wireless room thermostat | "UnA" | When the temperature cannot be set | Register the thermostat |
| "Err" | When registration failed | Try to register again | |
| "E00" | KTY is not attachted to the main device, or the connected sensor is broken. | Attach/replace KTY sensor |
| Roth RTL return valve, wireless room thermostat head | Error code | Description | Action |
| Single Zone Main Controller | Power LED flashing | No connection with thermostat > 20 mins. | Replace batteries or move thermostat closer to main controller. |
| Roth Touchline® SL Plus room thermostat | "UnA" | When the temperature cannot be set | Register the thermostat |
| "Err" | When registration failed | Try to register again | |
| "err" | When an error occurred during calibration | Try to calibrate again – don’t touch the front of the thermostat while calibrating | |
| "--.-%" | When the humidity sensor is damaged | Thermostat must be replaced | |
| "--.-*" | When the temperature sensor is damaged | Thermostat must be replaced |
| Roth Touchline® PL | Error code | Description | Action |
| Roth Touchline® PL thermostat | "---" | When the temperature cannot be set | Register the thermostat |
| "Err" | When registration failed | Try to register again | |
| "Lo " | When low battery | Change battery within shortly | |
| Roth Touchline® PL - 2 ch. | Error code | Description | Action |
| 2 Ch. Main Controller | Power LED flashing | No connection with thermostat > 20 mins. | Replace batteries or move thermostat closer to main controller. |
| Roth Touchline® PL thermostat | "---" | When the temperature cannot be set | Register the thermostat |
| Roth Touchline® BL | Error code | Description | Action |
| Roth Touchline® BL 24V display thermostat | " --.-*" | When the temperature sensor is faulty | Replace thermostat |
| Roth Touchline® SL | Error code | Description | Action |
| Roth Touchline® SL Plus room thermostat | "UnA" | When the temperature cannot be set | Register the thermostat |
| "Err" | When registration failed | Try to register again | |
| "err" | When an error occurred during calibration | Try to calibrate again – don’t touch the front of the thermostat while calibrating | |
| "--.-%" | When the humidity sensor is damaged | Thermostat must be replaced | |
| "--.-*" | When the temperature sensor is damaged | Thermostat must be replaced | |
| Roth Touchline® SL standard thermostat | "UnA" | When the temperature cannot be set | Register the thermostat |
| "Err" | When registration failed | Try to register again | |
| "err" | When an error occurred during calibration | Try to calibrate again – don’t touch the front of the thermostat while calibrating | |
| "--.-%" | When the humidity sensor is damaged | Thermostat must be replaced | |
| "--.-*" | When the temperature sensor is damaged | Thermostat must be replaced | |
| "lo" + “bAt” | The battery level is below 10% | Change battery within shortly | |
| Roth Touchline® SL Radiator actuator | EO1 | Calibration error 1 Piston retraction to mounting position took too long | Locked/damaged actuator piston. Check the assembly and recalibrate the actuator |
| (Errors are displayed on the Master controller) These errors are displayed with other information: - Error number - Actuator number, zone number, - Time of occurrence Example: Error 2 Actuator 3 - Zone 6 Time for occurrence: 26 min. | EO2 | Calibration error 2 Piston max. extended as it did not meet any resistance during calibration | - Actuator is not properly/fully screwed onto the valve - Actuator movement was excessive, or a non-proprietary valve was found - Motor load measurement failure occurred. Check the assembly and recalibrate the actuator |
| EO3 | Calibration error 3 Piston extension to short. The piston meet resistance too early during the calibration | - Actuator movement was too small, or a non-proprietary valve was found - Motor load measurement failure occurred. - Motor load measurement inaccurate due to low battery level (check level on controller) Check the assembly and recalibrate the actuator | |
| EO4 | Actuator feedback communication error For the last “X” minutes, the actuator did not receive a data package via wireless communication After this error is triggered, the actuator will set itself to 0% open The error will be reset when a data package is received | - Master controller switched off - Poor or no signal originating from controller - Defective radio communication module in the actuator | |
| EO5 | Battery low The actuator will detect battery replacement after voltage rises and launch calibration | - Change all batteries | |
| EO6 | Not in use | ||
| EO7 | Actuator blocked | - While changing the opening of the valve, excessive load was encountered. Recalibrate the actuator | |
| Roth Touchline® SL Window contact (Errors are displayed on the Master controller) | No communication Window sen. “X” - Zone “X” Time for occurrence: “X” | Example: “No communication Window sen. 1 - Zone 2 Time of occurrence 2 min.” This information will indicate which window-opening sensor (1 to 6) in which zone (1 to 48) has reported a communication error, and how long this error has been active. | Possible two reasons: 1 -run out of battery -> change the battery 2 -poor radio connection to controller. To improve this, use a 5 m antenna extender cable (sold separately), and place the antenna closer to the sensor, which is having communication problems. If the main device is mounted in a metal cabinet, then place the antenna outside this cabinet. Optionally, use a signal repeater (Roth Touchline® SL repeater). |
| Roth Touchline® SL Outdoor sensor (Errors are displayed on the Master controller) | No communication External sensor Time for occurrence: “X” | This information will indicate that Outdoor temperature sensor has reported a communication error, and how long this error has been active. | Possible two reasons: 1 -run out of battery -> change the battery 2 -poor radio connection to controller. To improve this, use a 5 m antenna extender cable (sold separately), and place the antenna closer to the sensor, which is having communication problems. If the main device is mounted in a metal cabinet, then place the antenna outside this cabinet. Optionally, use a signal repeater (Roth Touchline® SL repeater). |
| Sensor damaged External sensor Time for occurrence: “X” | This information will indicate that Outdoor temperature sensor is damaged, and how long this error has been active. | Outdoor sensor must be replaced | |
| Roth Touchline® SL 8ch Master Controller 8ch and SL 8ch Extension Controller (other errors which are displayed on the Master and Extension controller) | No communication Actuator “X” - Zone “X” Time for occurrence: “X” | This information will indicate which radiator actuator (1 to 6) in a given zone (1 to 48) has reported a communication error, and how long this error has been active. | Possible two reasons: 1 -run out of battery -> change the battery 2 -poor radio connection to controller. To improve this, use a 5 m antenna extender cable (sold separately), and place the antenna closer to the sensor, which is having communication problems. If the main device is mounted in a metal cabinet, then place the antenna outside this cabinet. Optionally, use a signal repeater (Roth Touchline® SL repeater). |
| No communication Room sensor - Zone “X” Time for occurrence: “X” | This information will indicate that a room thermosatat or temperature sensor in a given zone (1 to 48) has reported a communication error, and how long this error has been active. | Possible two reasons: 1 -run out of battery -> change the battery 2 -poor radio connection to controller. To improve this, use a 5 m antenna extender cable (sold separately), and place the antenna closer to the sensor, which is having communication problems. If the main device is mounted in a metal cabinet, then place the antenna outside this cabinet. Optionally, use a signal repeater (Roth Touchline® SL repeater). | |
| No communication Floor sensor - Zone “X” Time for occurrence: “X” | This information will indicate that a floor temperature sensor in a given zone (1 to 48) has reported a communication error, and how long this error has been active. | Possible three reasons: 1 -run out of battery -> change the battery 2 -poor radio connection to controller. To improve this, use a 5 m antenna extender cable (sold separately), and place the antenna closer to the sensor, which is having communication problems. If the main device is mounted in a metal cabinet, then place the antenna outside this cabinet. Optionally, use a signal repeater (Roth Touchline® SL repeater). 3 - Place sensor/room thermostat in a different place – closer to the controller. | |
| No communication Additional c. - Master mo. / “X”. Extens. Time for occurrence: “X” | This information will indicate lost connection between Master module and Extension modules, and how long this error has been active | If it is wireless connection (radio connection) – to improve communication if it is long distance between devices use 5 m antenna extender cable (sold separately). Optionally, use a signal repeater (Roth Touchline® SL repeater). If it is cable connection: - Check cable and connectors - Check mains 230V power connection cable | |
| Sensor damaged Floor sensor - Zone “X” Time for occurrence: “X” | Floor temperature sensor broken or disconnected a given in zone (1 to 48) has reported a communication error, and how long this error has been active. | Check the connection cable / replace the sensor | |
| Sensor damaged Room sensor - Zone “X” Time for occurrence: “X” | Room temperature sensor/room thermostat is damaged in a given zone (1 to 48) has reported a communication error, and how long this error has been active. | Replace sensor/room thermostat | |
| No communication “X” Extension 8ch / Master module Time for occurrence: “X” | This information will indicate lost connection between a specific extension controller (nr 1 to nr 3) and the master controller, and how long this error has been active. | If it is wireless connection (radio connection) – to improve communication if it is long distance between devices use 5 m antenna extender cable (sold separately). Optionally, use a signal repeater (Roth Touchline® SL repeater). If it is cable connection: - Check cable and connectors - Check mains 230V power connection cable | |
| No communication Extension 4 c. - Master mo. / “X”. Extens. Time for occurrence: “X” | This message occurs when there is a communication error between the Master 8ch controller and connected 4ch module or extension 8ch controller number 1, 2 or 3 with connected 4 ch module, and how long this error has been active. | - Check connection cable between 8 ch controller and 4 ch module - Check mains 230V power cable in 4 ch module - Connect again and register again 4 ch module | |
| No communication Internet mod. - Master mo. Time for occurrence: “X” | Communication with master controller has been lost due to damaged cable / power loss. | - Check connection cable - Connect again with different cable and check | |
| System version out of date “X” Extension 8ch / Master module Time for occurrence: “X” | This information will show which device (Master 8 ch controller or 8 ch Extension controller nr 1 to nr 3) has a firmware version out of date, and how long this error has been active. | The error occurs when one of the devices in the entire system has an older firmware version. When such an error occurs, some new features of the system may not work. To fix it - upload the latest firmware to all devices in the kit: 8 ch master controller, 8 ch extension controller and 4 ch module. Same file with the latest firmware is used to update all the above-mentioned devices. | |
| Software version incorrect “X” Extension 8ch / Master module Time for occurrence: “X” | This information will show which device (Master 8ch controller or 8 ch Extension controller nr 1 to nr 3) has incompatible firmware version, and how long this error has been active. | The error occurs when one of the devices in the entire system has an older firmware version. The system will not work properly - the latest firmware should be uploaded to all devices straight away. A device with an old firmware version in this case will not register to the Master controller - all devices must be updated to the same firmware version before registration. | |
| No communication OpenTherm - Master module Time for occurrence: “X” | OpenTherm communication has been lost due to damaged cable / power loss. | - Check mains 230V power / connection cable. - OpenTherm communication is enabled and nothing is connected. - OpenTherm device is switched off or is faulty. | |
| Roth Touchline® SL Controller 4 ch WiFi | No communication Actuator “X” - Zone “X” Time for occurrence: “X” | This information will indicate which radiator actuator (1 to 6) in a given zone has reported a communication error, and how long this error has been active. | Possible two reasons: 1 -run out of battery -> change the battery 2 -poor radio connection to controller. To improve this, use a 5 m antenna extender cable (sold separately), and place the antenna closer to the sensor, which is having communication problems. If the main device is mounted in a metal cabinet, then place the antenna outside this cabinet. Optionally, use a signal repeater (Roth Touchline® SL repeater). |
| No communication Room sensor - Zone “X” Time for occurrence: “X” | This information will indicate that a room thermostat or temperature sensor in a given zone has reported a communication error, and how long this error has been active. | Possible two reasons: 1 -run out of battery -> change the battery 2 -poor radio connection to controller. To improve this, use a 5 m antenna extender cable (sold separately), and place the antenna closer to the sensor, which is having communication problems. If the main device is mounted in a metal cabinet, then place the antenna outside this cabinet. Optionally, use a signal repeater (Roth Touchline® SL repeater). | |
| No communication Floor sensor - Zone “X” Time for occurrence: “X” | This information will indicate that a floor temperature sensor in a given zone has reported a communication error, and how long this error has been active. | Possible three reasons: 1 -run out of battery -> change the battery 2 -poor radio connection to controller. To improve this, use a 5 m antenna extender cable (sold separately), and place the antenna closer to the sensor, which is having communication problems. If the main device is mounted in a metal cabinet, then place the antenna outside this cabinet. Optionally, use a signal repeater (Roth Touchline® SL repeater). 3 - Place sensor/room thermostat in a different place – closer to the controller. | |
| Sensor damaged Floor sensor - Zone “X” Time for occurrence: “X” | Floor temperature sensor broken or disconnected a given in zone has reported a communication error, and how long this error has been active. | Check the connection cable / replace the sensor | |
| Sensor damaged Room sensor - Zone “X” Time for occurrence: “X” | Room temperature sensor/room thermostat is damaged in a given zone has reported a communication error, and how long this error has been active. | Replace sensor/room thermostat |