3
Failures / Errors
GB012 - 25K
16
6.
Check the burner gas pressure. Are
the values OK ?
yes:
B
Correct the gas pressure values. If not possible,
change the gas valve.
1H failure still exist ? -->7.
no:
-->7.
7.
Is the heat exchanger and recupera-
tor surface dirty or damaged (block-
age) ?
yes:
B
Remove the blockage.
1H failure still exist ? -->8.
no:
-->8.
8.
Electronic card is defect.
B
Switch off the appliance.
B
Cut mains supply.
B
Change the electronic card.
B
Connect to main supply.
B
Switch on the appliance.
1) The sensor is activated after 1 minute. After 3. failure the boiler is blocked. By first 2. time it will be reseted automaticly after 15 min.
1H
is flashing.
Cumbustion chamber temperature sensor
1)
is defect, not detected or overheating in cumbustion cham-
ber (pump runs continuously)
Control Step
Action
