30
31
2VV.
Creating innovative solutions for you and your business since 1995.
ver.5 5-05-20
9. REMOVING FAULTS
Description
Unit's behavi-
our
Likely problem
Solution
22 – Exhaust – Failure
of the temperature
sensor of the exchan-
ger's anti-freeze pro-
tection (T-INT2)
Unit is not
working
Room temperatu-
re sensor failure
Check that the sensor is correctly connected
to the electronics or test it measuring its resi-
stance (the resistance value at +20°C is around
10kW)
23 - Temperature sen-
sor failure of the ex-
changer's water supply
(T_WATER_IN)
Unit is not
working
Room temperatu-
re sensor failure
Check that the sensor is correctly connected
to the electronics or test it measuring its resi-
stance (the resistance value at +20°C is around
10kW)
24 - Failure in the
return water sensor
of exchanger (T_WA-
TER_OUT)
Unit is not
working
Room temperatu-
re sensor failure
Check that the sensor is correctly connected
to the electronics or test it measuring its resi-
stance (the resistance value at +20°C is around
10kW)
25 – Room tempe-
rature sensor failure
(T_Room)
Unit is venti-
lating
Room temperatu-
re sensor failure
Check that the sensor is correctly connected
to the electronics or test it measuring its resi-
stance (the resistance value at +20°C is around
10kW)
26 - Failure in the
pressure sensor of the
exhaust filter.
Unit is venti-
lating
Pressure sensor
failure
Check the supply point for mechanical da-
mage or whether it is clogged by dirt, or whe-
ther the supply hoses are free. The pressure
sensor will likely need to be replaced
27 - Failure in the
pressure sensor of the
inlet filter
Unit is venti-
lating
Pressure sensor
failure
Check the supply point for mechanical da-
mage or whether it is clogged by dirt, or whe-
ther the supply hoses are free. The pressure
sensor will likely need to be replaced
28 - Failure in the
pressure sensor of the
inlet fan
Unit is not
working
correctly
Pressure sensor
failure
Check the supply point for mechanical da-
mage or whether it is clogged by dirt, or whe-
ther the supply hoses are free. The pressure
sensor will likely need to be replaced
29 - Failure in the
pressure sensor of the
exhaust fan
Unit is not
working
correctly
Pressure sensor
failure
Check the supply point for mechanical da-
mage or whether it is clogged by dirt, or whe-
ther the supply hoses are free. The pressure
sensor will likely need to be replaced
30 - Failure in the
pressure sensor of the
VAV supply channel
Unit is not
working
correctly
Pressure sensor
failure
Check the supply point for mechanical da-
mage or whether it is clogged by dirt, or whe-
ther the supply hoses are free. The pressure
sensor will likely need to be replaced
31 - Failure in the
pressure sensor of
the VAV C4 exhaust
channel
Unit is not
working
correctly
Pressure sensor
failure
Check the supply point for mechanical da-
mage or whether it is clogged by dirt, or whe-
ther the supply hoses are free. The pressure
sensor will likely need to be replaced
