2VV.
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Description
Unit's behaviour
Likely problem
Solution
23 - Temperature sensor
failure
exchanger’s
water supply
(T_WATER_IN)
Unit is not working
Temperature sensor failure
Check that the sensor is correctly connect-
ed to the electronics or test it measuring its
resistance (the resistance value at +20°C is
around 10kW)
24 – Exchanger’s return
sensor
failure
(T_WATER_OUT)
Unit is not working
Temperature sensor failure
Check that the sensor is correctly connect-
ed to the electronics or test it measuring its
resistance (the resistance value at +20°C is
around 10kW)
25 – Room temperature
sensor
failure (T_Room)
Unit is ventilating
Temperature sensor failure
Check that the sensor is correctly connect-
ed to the electronics or test it measuring its
resistance (the resistance value at +20°C is
around 10kW)
26 – Exhaust filter’s pres-
sure sensor
failure
Unit is ventilating
Pressure sensor failure
Check the supply point for mechanical
damage or whether it is clogged by dirt, or
whether the supply hoses are free. The pres-
sure sensor will likely need to be replaced
27 - Intake filter’s pressure
sensor
failure
Unit is ventilating
Pressure sensor failure
Check the supply point for mechanical
damage or whether it is clogged by dirt, or
whether the supply hoses are free. The pres-
sure sensor will likely need to be replaced
28 – Intake fan’s pressure
sensor
failure
Unit is not working
correctly
Pressure sensor failure
Check the supply point for mechanical
damage or whether it is clogged by dirt, or
whether the supply hoses are free. The pres-
sure sensor will likely need to be replaced
29 - Exhaust fan’s pressure
sensor
failure
Unit is not working
correctly
Pressure sensor failure
Check the supply point for mechanical
damage or whether it is clogged by dirt, or
whether the supply hoses are free. The pres-
sure sensor will likely need to be replaced
32 - Air quality sensor
failure
Unit is ventilating
Defective air quality sensor
Check that the quality sensor is connected
correctly or check that it is operating cor-
rectly (output signal value)
33 – Recirculation’s humid-
ity sensor
failure
Unit is ventilating
Defective relative humidity
sensor
Check that the humidity sensor is connect-
ed correctly or check that it is operating
correctly (output signal value)
34 – External temperature
BMS sensor
failure
Unit is ventilating
Defective sensor in BMS or
incorrectly received data
Check that the address and values of the
sensor in the BMS system are correct. Check
that the sensor in the BMS system is work-
ing.
36 - B moduli error
Unit is not working
The unit can not control the
peripherals connected to
Module B
Unable to communicate with module B.
Check whether the communication cable
between motherboards A and B is dam-
aged If necessary, replace module B
50-Filtre d'amenée encrassé
> 80 %
L'unité aère
Filtre encrassé
On recommande de remplacer le filtre
51-Filtre de sortie encrassé
> 80 %
L'unité aère
Filtre encrassé
On recommande de remplacer le filtre
70-Protection antigel de
l'échangeur thermique a eau
L'unité aère
La protection antigel de
l'échangeur thermique a eau
est active.
La protection automatique de l'échangeur à eau
est active pour empêcher son endommagement
par un basse température de l'air. Cette fonction
est autonome et s'achèvera dès que le risque de
gel passera.
71 – Water heater – waiting
for water temperature
Unit is ventilating
The unit controls the tem-
perature of the liquid in the
exchanger
The automatic process that assess the water
temperature in the exchanger to activate
the next steps is in progress
