Dantherm HCV 300 Manual page 45

INSTALLATION & SERVICE MANUAL FOR PROFESSIONALS
Maintenance and care: Error list
A B
3
3
Error
C Error
code
R 0 E 3 Bypass damper
does not close as
expected
Bypass damper
Reduced heat re-
covery due to low
exhaust airflow
R 0 E3 Bypass is closed,
but supply air
temperature
is lower than
expected
The airflows are
out of balance.
There is more
extract air than
supply air
Action
Possible cause
required
Selector switch Check if Bypass is
enabled in PC Tool
position A:
Bypass is closed,
Check if bypass is
but supply air
blocked
temperature
Check the me-
is lower than
chanical connection
expected
between the bypass
actuator and the
Selector switch
bypass valve
position B:
Bypass is closed,
Check electrical
but exhaust air
connection between
temperature
controller and bypass
is higher than
Check controller
expected
output
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
pressure in the
and instead
house
connect the extract
air from the bath-
room
to the fan
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 flue/
creating negative stove supplier for
pressure in the information about
house safety precautions
Dirty supply air Change filters
filter
Poor balancing of Adjust the system
airflows
Reset
Automatic reset
if efficiency is
high enough for
30 seconds
Automatic reset
if efficiency is
high enough for
30 seconds
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