Technical data

7 181 465 346 GB (03.02)
34
Failure identification procedure
8. Is diaphragm in the mixer unit cor-
rectly fitted and functional?
B Open mixer unit (29).
B Check diaphragm for correct ori-
entation, soiling and splitting.
Is diaphragm OK?
yes: B Close mixer unit.
↓9.
no: B Insert diaphragm in the fan intake duct as per
installation instructions so that the flaps open
upwards.
B Close mixer unit.
EA? ↓9.
9. Is the condensation trap blocked? yes: B Clean out condensation trap discharge pipe.
B Press , restart the appliance.
EA? ↓13.
no: ↓10.
10. Check the gas valve?
B Power OFF the appliance.
B Unplug the connectors from the
gas valve.
B Measure the gas valve coils I and
II electrical resistance.
R = 164 ± 40Ω ?
yes: B Reconnect the gas valve.
B Turn ON the appliance.
B Press , restart the appliance.
EA? ↓11.
no: B Change the gas valve.
B Reconnect the gas valve.
B Turn ON the appliance.
B Press , restart the appliance.
EA? ↓11.
11. Problem with flue?
B Check CO
2
level in combustion
air.
Is CO
2
level above 0,2 % ?
B Open up heat exchanger - is it
dirty?
yes: B Check flue and clean if necessary.
B Press , restart the appliance.
EA? ↓12.
no: ↓12.
12.
Is flue gas CO
2
level incorrect
1)
?
yes: B Adjust to correct level.
B Press , restart the appliance.
EA? ↓13.
no: ↓13.
EA and flashing.
No flame ionisations signal
Check Action