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2VV.
Creating innovative solutions for you and your business since 1995.
9. FAULTS REMOVAL
Description
Unit's behaviour
Likely problem
Solution
14 - ADB module error
Unit is working
Failure of adiabatic mo-
dule
Check that the input error is correctly
connected to the electronics or, if nece-
ssary, that the adiabatic module is ope-
rating correctly
15 - Heat pump error
Unit is working
Heat pump failure
Check that the input error is correctly
connected to the electronics or, if nece-
ssary, that the heat pump is operating
correctly (according to the instructions
of its manufacturer)
16 – Inlet – External
temperature sensor
failure (T-EXT1)
Unit is not working
Room temperature sensor
failure
Check that the sensor is correctly co-
nnected to the electronics or test it
measuring its resistance (the resistance
value at +20°C is around 10kW)
17 – Inlet – Failure of the
temperature sensor
behind the exchanger
(T-EXT2)
Unit is not working
Room temperature sensor
failure
Check that the sensor is correctly co-
nnected to the electronics or test it
measuring its resistance (the resistance
value at +20°C is around 10kW)
18 – Inlet – Temperature
sensor failure in the
supply canal (T-EXT3)
Unit is not working
Room temperature sensor
failure
Check that the sensor is correctly co-
nnected to the electronics or test it
measuring its resistance (the resistance
value at +20°C is around 10kW)
19 - Inlet - Temperature
sensor failure after
the second exchanger
(T-EXT4)
Unit is not working
Room temperature sensor
failure
Check that the sensor is correctly co-
nnected to the electronics or test it
measuring its resistance (the resistance
value at +20°C is around 10kW)
20 - Exhaust - Temperature
sensor failure in the
exhaust canal (T-INT0)
Unit is not working
Room temperature sensor
failure
Check that the sensor is correctly co-
nnected to the electronics or test it
measuring its resistance (the resistance
value at +20°C is around 10kW)
21 - Exhaust - Temperature
sensor failure in the
exhaust canal (T-INT1)
Unit is not working
Room temperature sensor
failure
Check that the sensor is correctly co-
nnected to the electronics or test it
measuring its resistance (the resistance
value at +20°C is around 10kW)
22 – Exhaust – Failure of
the temperature
sensor of the
exchanger's
anti-freeze protection
(T-INT2)
Unit is not working
Room temperature sensor
failure
Check that the sensor is correctly co-
nnected to the electronics or test it
measuring its resistance (the resistance
value at +20°C is around 10kW)
23 - Temperature sensor
failure of the
exchanger's water
supply (T_WATER_IN)
Unit is not working
Room temperature sensor
failure
Check that the sensor is correctly co-
nnected to the electronics or test it
measuring its resistance (the resistance
value at +20°C is around 10kW)
24 - Failure in the return
water sensor of
exchanger
(T_WATER_OUT)
Unit is not working
Room temperature sensor
failure
Check that the sensor is correctly co-
nnected to the electronics or test it
measuring its resistance (the resistance
value at +20°C is around 10kW)