47
INSTALLATION & SERVICE MANUAL FOR PROFESSIONALS
Maintenance and care: Error list
en
A
B C
Error
code
Error Possible cause
Action
required
Reset
4 R 1 E 4 Extract air tem-
perature sensor
(T1)
The control panel
measures that the
temperature sen-
sor is either open
or short-circuited
Temperature
sensors are not
mounted cor-
rectly
Mount temperature
sensors correctly
Automatic reset
if temperature
is within normal
range for 30
seconds
Resistance in one
of the tempera-
ture sensors is too
low or too high
Replace temperature
sensors
Temperature
sensor resistance
is OK
Replace control panel
5 R 1 E 5 Supply air tem-
perature sensor
(T2)
The control panel
measures that the
temperature sen-
sor is either open
or short-circuited
Temperature
sensors are not
mounted cor-
rectly
Mount temperature
sensors correctly
Automatic reset
if temperature
is within normal
range for 30
seconds
Resistance in one
of the tempera-
ture sensors is too
low or too high
Replace temperature
sensors
Temperature
sensor resistance
is OK
Replace control panel
6 R 1 E 6 Extract air tem-
perature sensor
(T3)
The control panel
measures that the
temperature sen-
sor is either open
or short-circuited
Temperature
sensors are not
mounted cor-
rectly
Mount temperature
sensors correctly
Automatic reset
if temperature
is within normal
range for 30
seconds
Resistance in one
of the tempera-
ture sensors is too
low or too high
Replace temperature
sensors
Temperature
sensor resistance
is OK
Replace control panel
7 R 1 E 7 Exhaust air tem-
perature sensor
(T4)
The control panel
measures that the
temperature sen-
sor is either open
or short-circuited
Temperature
sensors are not
mounted cor-
rectly
Fit temperature sen-
sors correctly
Automatic reset
if temperature
is within normal
range for 30
seconds
Resistance in one
of the tempera-
ture sensors is too
low or too high.
Replace temperature
sensors
Resistance in tem-
perature sensors
is OK
Replace control panel
8 - 0 E 8 Room air tem-
perature sensor
(T5)
Shown only on wireless remote control Automatic reset
9 - - E 9 Not used
10 R 0 E 10 Outdoor air tem-
perature < -13°C
- - Automatic re-
start after 1800
seconds
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