21 - EN
2.10.1 Malfunction alerts on the digital
operating device
In the event of a malfunction, the corresponding
malfunction code will be displayed on the digital
operating device of the ComfoAir.
Below is a list of the malfunction alerts on the digital
operating device.
In the chapter about trouble shooting is explained
how to solve these malfunctions
Code
description
A0
NTC sensor TGe is defective.
(= geothermal heat exchanger
temperature)
A1
NTC sensor T1 is defective.
(= outside air temperature)
A2
NTC sensor T2 is defective.
(= supply air temperature)
A3
NTC sensor T3 is defective.
( =return air temperature)
A4
NTC sensor T4 is defective.
(= exhaust air temperature)
A5
Malfunction in the bypass motor.
A6
Malfunction in the
Preheater element motor.
A7
Preheater element does not heat
sufficiently.
A8
Preheater element becomes too
hot
A10
NTC sensor Tch is defective.
(= extractor hood temperature)
A11
NTC sensor Tah is defective.
(= afterheater temperature)
E1
Exhaust fan not rotating.
E2
Supply fan not rotating.
E3
Temperature sensor extractor
hood too high.
E4
ComfoAir has been switched off
by external contact.
EA1
Enthalpy sensor measures exces-
sive Relative Humidity (RH) values.
EA2
No communication between the
enthalpy sensor and the ComfoAir.
E15
No communication between the
CC Luxe panel and the ComfoAir.
E16
No communication between the
ComfoCool and the CC Luxe
panel.
NC
No communication between the
CC Ease panel and the ComfoAir.
Filterl
Internal Filter is dirty.
FilterE
External Filter is dirty.
2.10.2 3-position switch with malfunction
indicators
The 3-position switches that are fitted with a mal
-
function indicator show when a malfunction or filter
dirty alert has occurred. Depending on the type of
the 3-position switch, this is done in one of the fol-
lowing two ways:
• 3-position switch with malfunction indicator.
In the event of a malfunction or filter dirty alert
the indicator lights up;
• Wireless 3-position switch with malfunction in
-
dicator.
The malfunction indicators will light up once
this 3-position switch is used. One indicator
will light up green to indicate communication
has been established. Subsequently, in the
event of a malfunctionor filter dirty alert both
indicators will flash red 3 times. After that, both
indicators will light up green once more.
