46
INSTALLATION & SERVICE MANUAL FOR PROFESSIONALS
Maintenance and care
: Error list
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
Summary of Contents for HCH 5 MKII
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