1. Introdução
The Jung AUT238DWW is an LCD display cover designed for the Jung UT 238 E programmable thermostat mechanism. This unit provides a user interface for precise control over your heating system, featuring a clear display and intuitive buttons for programming and adjustments. It integrates a weekly timer to manage heating schedules efficiently, ensuring comfort and energy savings.
Os principais recursos incluem:
- Three adjustable temperature settings: Comfort, Setback (night/economy), and Frost Protection.
- Automatic summer/winter time switching.
- Temperature detection via internal and/or external sensor.
- Additional energy-saving button for reduced temperature mode.
- "Party" mode to extend comfort temperature for selected periods.
- Power reserve for settings retention during power outage.
- Cooling function for passive cooling systems.
2. Instruções de segurança
Please read these instructions carefully before installation and operation. Keep this manual for future reference.
- Installation should only be performed by a qualified electrician in accordance with local regulations.
- Certifique-se de que a fonte de alimentação esteja desconectada antes de qualquer trabalho de instalação ou manutenção.
- Não exponha o dispositivo à umidade, temperaturas extremas ou luz solar direta.
- Não abra nem tente reparar o dispositivo por conta própria. Encaminhe todos os serviços de manutenção a pessoal qualificado.
3. Componentes do produto e maisview
The Jung AUT238DWW display cover consists of an LCD screen and several control buttons. Refer to the image below for a visual guide to the main components.

Controles principais:
- Tela LCD: Shows current temperature, time, day of the week, and active mode icons.
- Botões '+' e '-': Used to adjust values such as time or temperature.
- Botão de configuração: Confirms set values. If not pressed within 1 minute after adjustment, the display returns to normal mode without saving changes.
- Botão PROG: Allows access to programming functions and returns to the normal time program.
- Star/Snowflake Button: (Left button) Likely for quick access to Comfort or Frost Protection modes.
- Moon Button: (Right button) Likely for quick access to Setback (night) mode.
4. Instalação e configuração inicial
This AUT238DWW unit is a display cover designed to be mounted onto the Jung UT 238 E programmable thermostat mechanism. Ensure the UT 238 E mechanism is correctly installed and wired according to its specific instructions before attaching this display cover.
4.1 Attaching the Display Cover
- Ensure the power supply to the thermostat mechanism is completely disconnected at the main circuit breaker.
- Carefully align the AUT238DWW display cover with the UT 238 E thermostat mechanism.
- Gently press the cover into place until it clicks securely. Do not force it.
- Restore power to the thermostat mechanism. The display should illuminate.
4.2 Configuração inicial de data e hora
Ao ligar pela primeira vez ou após um período prolongado sem energiatage (beyond the power reserve), you may need to set the current time and date. Refer to the "Operating Instructions" section for detailed steps on using the +, -, e DEFINIR buttons to adjust these values.
5. Instruções de operação
5.1 Operação básica
To adjust values such as time or temperature, use the + or - buttons. Confirm your settings by pressing the DEFINIR botão. Se o DEFINIR button is not pressed within 1 minute after the last button press, the display will automatically revert to the normal display mode, and any unsaved changes will be lost.
Pressionando o PROG. button allows you to navigate through programming menus or return to the normal time program.
5.2 Understanding Thermostat Modes
The thermostat operates by controlling the heating system based on three adjustable temperature settings at specific times:
- Temperatura de conforto: Typically used during the day or periods of presence.
- Setback Temperature (Economy/Night): Usually applied during the night or periods of absence to save energy.
- Frost Protection Temperature: Used during extended periods of absence (e.g., holidays) to prevent the heating system from freezing. This temperature is set just high enough to protect the system.
5.3 Programação de temporizador semanal
The integrated weekly timer allows for time-controlled temperature management for a single room or floor heating. You can set up to 32 individual switching times throughout the week. For each switching time, you define the start time, end time, and the desired temperature mode (Comfort, Setback, or Frost Protection).
- Pressione o PROG. botão para entrar no menu de programação.
- Use o + or - buttons to navigate through the program slots (e.g., P1, P2, etc.).
- Imprensa DEFINIR to select a program slot.
- Usar + or - to set the start time, then press DEFINIR.
- Usar + or - to set the end time, then press DEFINIR.
- Usar + or - to select the desired temperature mode (Comfort, Setback, Frost Protection) for this period, then press DEFINIR.
- Repeat for all desired switching times. Press PROG. to exit the programming menu.
The system includes heating optimization, which means it will activate heating in advance to ensure the desired temperature is reached precisely at the programmed time.
5.4 Funções especiais
- Botão de economia de energia: An additional button allows for quick switching to the reduced (setback) temperature.
- "Party" Mode: Activates the comfort temperature for a selectable period of 1 to 4 hours, overriding the current program. This is useful for temporary extensions of comfort.
- Função de resfriamento: The thermostat supports a simple cooling function for passive cooling systems (e.g., via geothermal exchangers). Refer to the UT 238 E mechanism manual for activation details.
6. Manutenção e Cuidados
The Jung AUT238DWW display cover requires minimal maintenance.
- Limpeza: Wipe the display and buttons with a soft, dry, or slightly damp pano. Não utilize produtos de limpeza abrasivos, solventes ou sprays químicos, pois estes podem danificar a superfície.
- Battery (Power Reserve): The device features a power reserve (capacitor, not a battery) that retains settings for up to 4 hours during power interruptions and programming for up to 10 years. No user maintenance is required for this feature.
7. Solução De Problemas
If you encounter issues with your Jung AUT238DWW display cover or the connected thermostat mechanism, consider the following:
- O display está em branco: Check the power supply to the thermostat mechanism. Ensure it is correctly installed and receiving power.
- Configurações não estão sendo salvas: Certifique-se de pressionar o DEFINIR button to confirm changes after adjusting values. If you wait too long (over 1 minute), changes will not be saved.
- Leituras de temperatura incorretas: Verify that the temperature sensor (internal or external, depending on configuration) is not obstructed and is functioning correctly.
- Heating not responding: Check the programming schedule to ensure the thermostat is set to a heating mode and desired temperature. Verify the UT 238 E mechanism is correctly wired to your heating system.
For persistent issues, consult the full manual for the Jung UT 238 E thermostat mechanism or contact Jung customer support.
8. Especificações técnicas
| Recurso | Especificação |
|---|---|
| Marca | Jovem |
| Número do modelo | AUT238DWW |
| Cor | Alpine White |
| Volumetage | 230 Volts |
| Fonte de energia | Powered by mechanism (UT 238 E) |
| Luz de fundo | Sim |
| Dimensões (Pacote) | 23.4 x 15.6 x 6 cm |
| Peso do item | 240 gramas |
| Material | Termoplástico |
| Tipo de temporizador | Electronic with weekly program, automatic summer/winter time switching |
| Diferencial de temperatura | ± 0.1 ... ± 1.3 K, adjustable (0.1 K steps) |
| Program Slots | 32, assignable over the week (10-minute steps) |
| Reserva de energia | Minimum 4 hours (capacitor), settings retained up to 10 years |
| Tempo mínimo de comutação | 20 seconds to 500 seconds (10-second steps) |
| Blockade Protection | After 7 days of no relay actuation, activates at 10:00 AM the next day |
| Conexão | Terminais de parafuso |
| Modo de ação | 1.C (no limiting operation) |
| Vida elétrica | At least 5 x 104 ciclos de comutação |
| Faixas de temperatura |
|
9. Garantia e Suporte
9.1 Informações de garantia
Specific warranty details for the Jung AUT238DWW are typically provided with the product packaging or can be found on the official Jung website. Guarde o comprovante de compra para solicitações de garantia.
9.2 Suporte ao cliente
For technical assistance, troubleshooting, or further information regarding your Jung AUT238DWW display cover or the UT 238 E thermostat mechanism, please contact Jung customer support through their official website ou os detalhes de contato fornecidos na documentação do seu produto.
You can typically find support information on the Jung official website.





