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.
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