Why is the gas pressure switch failing on my REMEHA Gas 120 ACE?
The gas pressure switch on your REMEHA Boiler might be failing due to several reasons: there is no flow or insufficient flow, so check that the gas valve is fully opened. Also, check the gas supply pressure and ensure the gas pressure switch is installed correctly. If necessary, replace the gas pressure switch.
What causes a 5x Flame Loss Error in my REMEHA Gas 120 ACE Boiler?
A 5x Flame Loss Error in your REMEHA Boiler can occur due to an unintended flame loss. To resolve this, vent the gas supply to remove air. Also, check whether the gas valve is properly open, check the gas supply pressure, check the operation and setting of the gas valve unit, ensure that the air supply and flue gas discharge flues are not blocked, and verify that there is no recirculation of flue gases.
How to fix Max Tflow error on REMEHA Gas 120 ACE Boiler?
The Max Tflow error on your REMEHA Boiler indicates that the flow temperature has exceeded the maximum operating value. Check the wiring and connectors for bad connections. Also, if there is no flow or insufficient flow, check the circulation (direction, pump, valves).
Why REMEHA Gas 120 ACE Boiler is having unsuccessful starts?
If your REMEHA Boiler is experiencing unsuccessful starts, it could be due to 5 unsuccessful burner starts being detected. Check the wiring between the CU-GH-08 unit and the igniter for no ignition spark. Also, vent the gas pipes to remove air if there is ignition spark but no flame. You may need to check the ionization/ignition electrode, the earthing, and the surface condition of the burner. If these steps don't resolve the issue, the SU PCB might be faulty and need replacement.
What to do if WaterPressureMissing error appears on REMEHA Boiler?
If you see a 'WaterPressureMissing' error on your REMEHA Boiler, it means the water pressure sensor was expected but not detected. This could be because the water pressure sensor is not connected, so connect the sensor. If it is connected, ensure it is connected correctly.
What does Return Open mean on REMEHA Boiler?
A 'Return Open' message on your REMEHA Boiler indicates that the return temperature sensor is either removed or measuring a temperature below range. Check the wiring and connectors for bad connections. Also, check that the sensor has been correctly fitted and replace the sensor if it is faulty.
What does Return Closed mean on REMEHA Gas 120 ACE Boiler?
A 'Return Closed' message on your REMEHA Boiler means that the return temperature sensor is either shorted or measuring a temperature above range. You should check the wiring and connectors for bad connections. If the wiring is correct, the sensor may be faulty and needs to be replaced.
Why is the return temperature higher than the flow temperature in my REMEHA Gas 120 ACE Boiler?
If the return temperature is higher than the flow temperature in your REMEHA Boiler, it could be due to several reasons. Check the wiring and connectors for bad connections. Also, check the circulation (direction, pump, valves) because the water circulation might be in the wrong direction. Ensure the sensor has been correctly fitted, check the Ohmic value of the sensor if it is malfunctioning, and replace the sensor if it is faulty.
How to troubleshoot dTReturn Too High error on REMEHA Gas 120 ACE Boiler?
A 'dTReturn Too High' error on your REMEHA Boiler indicates that the return temperature difference is too large. Vent the air from the heating system to eliminate no circulation. Also consider checking the hydraulic pressure, the circulation (direction, pump, valves), and ensure that the heating pump is operating correctly. Inspect the cleanliness of the heat exchanger, ensure the sensors are operating correctly and that the sensor has been correctly fitted. If necessary, replace the sensor.
What to do if my REMEHA Boiler is partially blocked?
If your REMEHA Boiler is partially blocked, it could be due to an external cause, so remove the external cause. It could also be due to a wrong parameter set, so check the parameters. Finally, it could be due to a bad connection, so check the connection.
Covers general safety instructions for the appliance, including installer and user guidelines.
Provides specific safety warnings and procedures for individuals installing the appliance.
Details essential safety precautions for operating and using the appliance.
Offers important recommendations for safe and efficient operation and installation.
Outlines the liabilities of the manufacturer, installer, and user regarding the appliance.
Explains the various symbols used within the manual and on the appliance itself.
Defines danger levels and symbols used to convey important information.
Illustrates and explains symbols found directly on the appliance.
Lists the standards, directives, and certifications applicable to the product.
Details compliance with European directives and relevant standards.
Describes the tests performed on each appliance before it leaves the factory.
Provides the electrical schematic for the MID control unit HMI T-control.
Detailed electrical diagram illustrating connections for the control unit.
Overview of the control box's function for the Gas 120 ACE boiler.
Identifies and describes the primary components of the control box.
Details the various Printed Circuit Boards (PCBs) used in the control system.
Explains the features and functionality of the SCB-02 expansion board.
Details the connectivity options provided by the CB-09 PCB.
Describes the IF-01 PCB, its features, and its role in system control.
Explains the control panel's user interface and main screen elements.
Details the buttons, display screen, and LED indicators on the control panel.
Explains the layout and symbols displayed on the main screen.
Lists the items included in the standard package for the boiler control box.
Refers to the catalogue for a detailed list of available accessories and options.
Specifies the regulations and standards that must be followed during installation.
Step-by-step instructions for unpacking and mounting the control box.
Covers recommendations, power supply, cable specifications, and routing for electrical connections.
Provides essential recommendations for making safe electrical connections.
Specifies the required power supply voltage and frequency for the appliance.
Guidance on selecting the appropriate cable cross-section based on installation factors.
Instructions for routing cables and accessing terminal blocks for connections.
Details on connecting modulating thermostats via the R-Bus connection.
Instructions for connecting a standard two-wire on/off room thermostat.
Describes how to use a frost thermostat with an on/off thermostat for frost protection.
Explains frost protection using an outdoor temperature sensor.
Instructions for connecting an outdoor temperature sensor accessory.
Details on connecting a blocking input for device lockout.
Explanation of the release input and its function for device operation.
Information on connecting various external sensors like temperature and flow sensors.
Guidance on connecting a domestic hot water or tank sensor/thermostat.
Instructions for connecting a modulating pump using PWM control.
Steps for connecting a standard pump to the PCB.
Details on connecting a DHW pump, including its maximum power consumption.
Instructions for connecting a three-way valve for boiler group or zone control.
Guidance on connecting a system pump for a mixing group (zone).
Explains how to connect potential-free contacts for status notifications.
Details on using the 0-10 V output for PWM pump control.
Describes the connection options available on the IF-01 expansion PCB.
Instructions for connecting a PC or laptop for configuration and diagnostics.
Details the factory default settings for heating and DHW circuits.
Illustrates a connection example for a boiler with a mixing zone and DHW zone.
Defines commissioning and the conditions under which it is performed.
A comprehensive checklist to ensure all pre-commissioning checks are completed.
Procedures for checking the gas supply, pressure, and connections.
Detailed steps for setting the correct gas pressure for various gas types.
Ensures all electrical connections, including mains, sensors, and equipment, are correct.
Verifies the integrity of the hydraulic system, including siphon and connections.
Instructions for initial commissioning and procedures for shutting down the boiler.
Steps for initial setup, parameter configuration, and heat request.
Procedures for safely shutting down the boiler for maintenance or periods of absence.
Covers adapting the boiler to different gas types and adjusting combustion.
Steps to adjust the boiler for various gas types, including propane and butane.
Procedures for checking and adjusting O2 and CO2 levels for optimal combustion.
How to view the current water pressure reading on the appliance's control panel.
Instructions on how to adjust the AT value for systems with multiple operating temperatures.
Final checks and user instructions to be performed after successful commissioning.
Explains the concepts of 'Zone' and 'Activity' for system configuration.
Defines a zone as a hydraulic circuit serving multiple rooms.
Defines an activity as a client's comfort level with associated setpoint temperatures.
How to activate or deactivate the central heating function for energy saving.
Enables setting reduced temperatures for extended absences to save energy.
Guide to modifying fundamental settings like date, time, language, and installer details.
Allows personalization of activity names for better user interface clarity.
Enables customization of zone names and associated symbols for easy identification.
Covers selecting operating modes, adjusting temperatures, and temporary changes.
Allows choosing between five operating modes for room temperature control.
Procedure to modify the temperature settings for specific activities within a zone.
How to make temporary adjustments to room temperature, overriding current settings.
Enables setting up timed heating schedules for individual zones.
Covers operating modes, forcing production, and timer programming for DHW.
Allows selection of operating modes for domestic hot water production.
Enables forcing DHW production to comfort temperature for a defined duration.
Procedure to adjust comfort and reduced hot water set point temperatures.
Enables setting timed programs for varying domestic hot water temperatures.
Details on how to access protected installer-level parameters using an access code.
Explains how to adjust the heating curve for optimal relationship between outdoor and flow temperatures.
Describes the function for reducing drying time of screed for underfloor heating systems.
How to set up maintenance reminders based on operating hours or energy usage.
Procedure to save installer contact information for easy user access.
Enables saving current configuration settings for potential restoration.
Covers resetting after PCB replacement, auto-detecting, and reverting settings.
Steps to reset configuration numbers after replacing a boiler or safety unit PCB.
Function to detect all devices connected to the CAN bus after PCB replacement.
Restores previously saved installation-specific settings.
Procedure to reset all parameters back to the original factory default values.
How to view hardware and software versions of the appliance's components.
Overview of the menu structure accessible via the control panel's menu button.
Comprehensive lists and explanations of various parameters categorized by codes.
Explains the logic and structure of parameter codes for identification.
Guidance on optimizing system performance by adjusting parameters.
Details factory settings for various parameters, applicable to different appliance configurations.
Parameters specific to the SCB-02 board, including their functions and settings.
Recommends regular inspection and servicing by qualified professionals.
Explains how the boiler indicates when service is required and how to view notifications.
Guide on how to access and view details of service notifications on the display.
Covers routine maintenance tasks like checking combustion, venting, draining, and cleaning.
Details how to check and adjust combustion by measuring flue gas O2 percentage.
Step-by-step instructions for removing air from the heating system to prevent noises.
Procedures for draining the central heating system when necessary.
Ensures the hydraulic pressure meets the minimum required levels for operation.
Instructions on how to add water to the heating system to maintain correct pressure.
Guidance on how to clean the exterior of the boiler.
Covers special maintenance tasks like auto-detect and other operations.
Procedure to perform an auto-detect after replacing a control PCB.
Refers to the boiler manual for additional maintenance operations.
How to view, interpret, and clear stored error codes from the appliance's memory.
Categorizes error codes into Warning, Blockage, and Lock out types.
Describes warning codes, their display, and initial troubleshooting steps.
Explains blockage status, error codes, and automatic restart attempts.
Lists specific lock-out error codes and their corresponding descriptions and solutions.
Steps for safely switching off the boiler temporarily or permanently.
Instructions for safely recommissioning the boiler after decommissioning.
Guidance on the correct procedure for removing and disposing of the boiler.
Provides advice on how to save energy when using the heating system.
Discusses the impact of thermostat types and settings on energy consumption.
Thanks the customer and recommends regular inspection and maintenance.
Details the warranty coverage, limitations, and conditions for the appliance.
Guidance on ordering spare parts, emphasizing the use of genuine components.
Lists available spare parts for the control panel, identified by reference numbers.
Exploded view and list of spare parts for the control panel assembly.
Provides information on the seasonal space heating energy efficiency of the package.
Details on temperature controls, including class and contribution to energy efficiency.
Technical data for boiler space heaters, including efficiency, output, and noise levels.
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