AT 300-US series
40.020.941 - rev. 04 - 2011
15
English
The flame goes out
directly after ignition.
6
The pump thermostat
has not reached the
right temperature yet.
Replace the pump thermo-
stat.
Dealer
7
Only for the AT 307:
The hot air thermostat is
defective.
Replace the hot air thermo-
stat.
Dealer
8
Only for the AT 307:
The combustion air fan
is not functioning.
Check the motor and replace
if necessary.
Dealer
9
There is insufficient sup-
ply of combustion air
Only for the AT 306:
Clean the holes in the com-
bustion chamber wall, see
fig. 4 (B).
User
Only for the AT 307:
Clean the holes in the vapor-
iser, see fig. 6 (D).
User
Only for the AT 307:
Check the functioning of the
combustion air fan.
Dealer
10
There is no proper flue
draught.
Check whether the flue is fit-
ted according to the descrip-
tion, see "flue".
User
Check the flue for leakage.
User
Clean the flue if necessary.
User
11
The flue draught is too
high or irregular.
Position a flue stack valve,
see "flue".
Adjust the flue to the right
draught (see maintenance
table 5.1) with the counter-
weight on the valve(fig.9).
Dealer
12
The flue draught is too
low.
Check all connections in the
flue.
User
Reduce the number of
bends.
User
Heighten the flue.
User
Isolate the flue outside the
building.
User
Check the flue, see "flue".
User
Fault
Cause
Solution
Action
