What to do if the Vaillant VRT 350 Controller display is dark?
If the Vaillant Controller's display is dark, it might be due to an appliance fault. Try switching off the mains switch on all heat generators for about 1 minute, then switch them back on. If the display remains dark, inform a qualified technician.
Classifies action-related warnings by danger severity using symbols and signal words like Danger, Warning, and Caution.
Outlines qualifications for operators and required training topics from a skilled tradesman.
Provides general safety guidelines for installation, operation, and precautions against hazards.
Describes how the controller manages the heating system and hot water generation for a connected cylinder.
Details the controller's function as a room-temperature controller for heating installations.
Explains the controller's frost protection mechanism that protects the heating system from damage.
Describes the controller's two superordinate operating levels: operator and skilled tradesman.
Outlines the controller's menu structure with three levels: two selection levels and one setting level.
Describes the permanently visible display on the controller screen showing current settings.
Details how the controller is operated using two selector buttons and a rotary knob.
Explains how to change the desired day temperature directly from the basic display using the rotary knob.
Provides a step-by-step example of how to change the date on the controller.
Presents a visual overview of the controller's menu structure, including second heating circuit functions.
Provides an overview of adjustable and readable settings for the controller, explained in table format.
Lists and describes available operating modes for the controller, including Auto, Summer, and Set-back modes.
Covers functions for setting desired temperatures, timer programs, and basic settings like language and date.
Details setting the desired temperature for hot water generation.
Guides on setting time periods for heating circuits and hot water generation, including factory settings.
Explains setting time periods for individual days or blocks of days, with up to three time periods per day.
Allows setting a period for absence with specific temperature settings, with priority over operating modes.
Explains how to directly set the controller's operating mode using the right-hand selector button.
Details the operating modes for the heating circuit: Automatic, Summer, Comfort, Set-back, and System OFF.
Explains that hot water generation modes correspond to the heating circuit modes and cannot be set deviatingly.
Covers advanced functions like Cylinder boost, Party mode, and 1 day away from home for specific situations.
Covers service and fault messages displayed by the controller, indicating maintenance needs or system errors.
Explains service messages indicating the need for professional maintenance by a skilled tradesman.
Describes fault messages indicating a problem with the heating system, requiring troubleshooting or repair.
Provides tips for controlling room temperature efficiently to save energy, advising against overheating.
Offers methods to reduce room temperature for energy savings, suggesting reductions at night and during absences.
Gives advice on ensuring economical hot water generation, including temperature settings and timer programs.
Lists common faults, their causes (e.g., unit fault), and remedies (e.g., switching off/on, contacting specialist).
Classifies action-related warnings by danger severity using symbols and signal words like Danger, Warning, and Caution.
Outlines qualifications for operators and required training topics from a skilled tradesman.
Provides general safety guidelines for installation, operation, and precautions against hazards.
Describes how the controller manages the heating system and hot water generation for a connected cylinder.
Details the controller's function as a room-temperature controller for heating installations.
Explains the controller's frost protection mechanism that protects the heating system from damage.
Describes the controller's two superordinate operating levels: operator and skilled tradesman.
Outlines the controller's menu structure with three levels: two selection levels and one setting level.
Describes the permanently visible display on the controller screen showing current settings.
Details how the controller is operated using two selector buttons and a rotary knob.
Explains how to change the desired day temperature directly from the basic display using the rotary knob.
Provides a step-by-step example of how to change the date on the controller.
Presents a visual overview of the controller's menu structure, including second heating circuit functions.
Provides an overview of adjustable and readable settings for the controller, explained in table format.
Lists and describes available operating modes for the controller, including Auto, Summer, and Set-back modes.
Covers functions for setting desired temperatures, timer programs, and basic settings like language and date.
Details setting the desired temperature for hot water generation.
Guides on setting time periods for heating circuits and hot water generation, including factory settings.
Explains setting time periods for individual days or blocks of days, with up to three time periods per day.
Allows setting a period for absence with specific temperature settings, with priority over operating modes.
Explains how to directly set the controller's operating mode using the right-hand selector button.
Details the operating modes for the heating circuit: Automatic, Summer, Comfort, Set-back, and System OFF.
Explains that hot water generation modes correspond to the heating circuit modes and cannot be set deviatingly.
Covers advanced functions like Cylinder boost, Party mode, and 1 day away from home for specific situations.
Covers service and fault messages displayed by the controller, indicating maintenance needs or system errors.
Explains service messages indicating the need for professional maintenance by a skilled tradesman.
Describes fault messages indicating a problem with the heating system, requiring troubleshooting or repair.
Provides tips for controlling room temperature efficiently to save energy, advising against overheating.
Offers methods to reduce room temperature for energy savings, suggesting reductions at night and during absences.
Gives advice on ensuring economical hot water generation, including temperature settings and timer programs.
Lists common faults, their causes (e.g., unit fault), and remedies (e.g., switching off/on, contacting specialist).
General| Type | Room thermostat |
|---|---|
| Display | LCD |
| Mounting | Wall-mounted |
| Programming | 7-day programmable |
| Compatibility | Vaillant boilers |
| Control Range | 5°C to 30°C |
| Functions | Holiday mode |
| Power | Battery |
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