The air quality in the dwelling is not good / air supply and extraction in the dwelling are not working properly
Cause
Solution
a) One or both filters are dirty or blocked.
●
Clean or replace dirty/blocked filters.
b) The valves are dirty or blocked.
●
Clean the valves.
c) The air valves are not correctly adjusted.
●
Put the ventilation unit in commissioning mode
and readjust the system settings.
d) The fan is not running.
●
See "The ventilator is not running".
Cold air is being supplied to the dwelling
Cause
Solution
a) The filter in the extraction outlet is blocked.
●
Clean or replace the filter in the air outlet.
b) The air valves are not correctly adjusted.
●
Put the ventilation unit in commissioning mode
and readjust the system settings.
c) The bypass valve is in bypass mode when it should
not be.
●
Clean the bypass valve if it is dirty.
●
Replace the entire bypass valve if it is defective.
d) One of the temperature sensors is faulty.
●
If the supply air temperature sensor is faulty,
replace the wiring harness with the
temperature sensor in the motor module.
●
If the exhaust air temperature sensor is faulty,
replace the entire bypass module.
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