Dantherm HCV 300 Manual page 159

INSTALLATION & SERVICE MANUAL FOR PROFESSIONALS
Maintenance and care: Error list
A B
11 R
12 R
Error
C Error
code
0 E 11 Supply air tem-
perature < +5 °C
Reduced heat
recovery due to
low extract air
temperature
Reduced heat re-
covery due to low
exhaust airflow
2 E 12 Overheating
One of the
internal sensors
is measuring a
temperature >
70 °C.
Action
Possible cause
required
Low temperatures Ensure all ventilated
pulled out of un-
rooms are heated
heated rooms
Alternatively, close
the dampers in un-
heated rooms
Poorly insulated Improve duct insula-
ducts in cold tion
environments
Dirty extract air Change filters
filter
Poor balancing of Adjust the system
airflows
An extract fan in Remove extract
the bathroom is
fan from the bath-
creating negative
room and connect
pressure in the
extract air
house
from bathroom to
ventilation system
An extract air fan Ensure that warm
in the kitchen is make-up
creating negative
air can reach the
pressure in the
cooker hood.
house
If this is not possible,
open a window/door
while the cooker
hood is running
A cooker fan is Contact your chim-
creating negative ney/stove supplier
pressure in the for safety precautions
house
Overtemperature Check ventilation sys-
caused by fire tem and surround-
inside or outside ings for fire
the ventilation
system
Overtemperature Check ventilation sys-
caused by the tem and surround-
combination of a ings for fire
preheater or af-
terheater and too
Check which sensor
low an airflow
is measuring a high
temperature. Check if
the airflow is blocked
and if the filters are
dirty.
Raise the minimum
airflow setting if
necessary
Reset
Perform a
manual reset
by pressing the
alarm button on
the membrane
panel or by
switching the
unit on/off
Firmware version
2.9 and up also
has automatic
restart after 600
seconds
The alarm dis-
play can be reset
by pressing the
alarm button or
by turning the
unit off/on.
However, the
unit cannot be
started until the
alarm conditions
have disap-
peared
159