Hydronic system alarms or warnings require electrical and/or hydronic expertise to be resolved. Therefore, it is always recommended to contact your installer for assistance.
Below is a brief guide on alarm meanings and what to check based on the alarm presented.
Supply temp probe fault
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Description:
This is a blocking error. Without the value read by a supply probe the hydronic system doesn’t know how close/far it is from the target temp, therefore it cannot work.
To solve the issue, we recommend contacting your installer to verify any possible supply probe malfunction.
Resolution:
Verify that the probe is correctly installed on the supply pipe and securely attached to it.
Verify the proper connection of the probe to the Messana device, ensuring it is connected to the correct terminals (refer to the connection diagram provided by Messana) and that the connection is stable.
Return temp probe fault
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Description:
This fault doesn’t block the hydronic system. To solve the issue call your installer to verify any possible return probe malfunction.
Resolution:
Check that the probe is correctly connected to the return pipe and securely attached to it.
Verify the proper connection of the probe to the Messana device, ensuring it is connected to the correct terminals (refer to the connection diagram provided by Messana) and that the connection is stable.
High temp level 1
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Description:
This issue usually involves temperature regulation components in the central heating system or the energy source that heats the water.
Resolution:
Verify that the mixing valve is functioning correctly and that the energy sources are set correctly.
High temp level 2
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Description:
Typically, this problem concerns the water temperature mixing group or the pump in the central heating system.
Resolution:
Verify that the mixing valve is not stuck open or malfunctioning in any way. Also, check the state of the pump; there might be air inside of it, causing it to run dry and overheat the pipes.
Supply antifreeze
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Description:
This alarm is related to the water temperature in the supply pipes. The normal antifreeze procedure involves activating the mixing group (pump and mixing valve) and the energy sources to maintain the water temperature at a safe level to prevent freezing.
Resolution:
If this procedure fails, the system displays an alarm, and at this point, you should check that the above components are functioning correctly or take action to prevent water from freezing inside the pipes, causing serious damage.
Room antifreeze
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Description:
This alarm is related to the water temperature in the supply pipes. The normal antifreeze procedure involves activating the mixing group (pump and mixing valve) and the energy sources to keep the water temperature at a safe level to prevent freezing.
Resolution:
If this procedure fails, the system displays an alarm, and at this point, you should check that the above components are functioning correctly or take action to prevent water from freezing inside the pipes, causing serious damage.
Low Temp error
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Description:
This problem usually involves the water temperature mixing group.
Resolution:
Ensure the mixing valve is not stuck open and is functioning correctly.
Supply temperature doesn't reach the target
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Description:
In this case, check the mixing group and the energy sources. For the mixing group, ensure that the mixing valve is functioning properly and that the pump is active and working correctly.
Resolution:
Regarding the energy sources, check that they are not in alarm or blocked for any reason, and ensure they are not set to a temperature too low, conflicting with the target calculated by Messana Controls.
Thermoelectric valve control not available
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Description:
This error indicates that the regulation cannot open the zone heads. Normally, this is due to a lack of communication with the expansion unit where the zone heads are connected or due to a blockage caused by external factors.
Resolution
Check that the relevant expansion unit (refer to the connection diagram provided by Messana) is correctly powered and that the Ethernet cable is connected and functioning. You can also try an electrical reset to resolve any blocks caused by external disturbances.
Energy source not available
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Description:
This error occurs when the system is configured to control an energy source, such as a heat pump or boiler, but no suitable energy source is available for the current tank season. This unavailability may be due to the energy source satisfying thermal requests for another tank or due to a misconfiguration issue.
Season mode incompatible with main hydronic system
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Description:
This warning may indicate a problem with your system’s configuration. It occurs when there is a call for heating or cooling that the system cannot fulfill. For example, this error might appear if a cooling request is made in a system designed exclusively for heating.
If the above checks have not resolved the issue or if specialized assistance from Messana personnel is needed, please open a support case.