3
Failures / Errors
GB012 - 25K
15
1H
is flashing.
Cumbustion chamber temperature sensor
1)
is defect, not detected or overheating in cumbustion cham-
ber (pump runs continuously)
Control Step
Action
1.
Check if combustion chamber NTC
damaged or not and the position.
B
Switch off the appliance.
B
Pull the NTC cables out.
B
Measure NTC resistance.
Are the values correct ? (see NTC
values)
yes:
B
Check the cable connection.
1H failure still exist ? -->2.
no:
B
Change the NTC.
B
Connect the cable.
B
Switch on the appliance.
1H failure still exist ? -->2.
2.
Check if cable damaged or not.
B
Switch off the appliance.
B
In case of NTC is cahnged :
- Pull the NTC cables out.
- Measure NTC resistance.
- Reconnect the NTC cable.
B
Pull out the 20 poled connector on
control unit.
B
Measure the NTC resistance
directly on 20 poled connector.
Are the measured values on NTC
and cocnector different ?
yes:
B
Change the cable harness.
B
Switch on the appliance.
1H failure still exist ? -->3.
no:
-->3.
3.
Is there any blockage on flue gas
pipe?
yes:
B
Remove the blockage.
1H failure still exist ? -->4.
no:
-->4.
4.
Is the correct MAP (fan speed) value
according flue gas pipe length
choosen ?
no:
B
Adjust correct MAP value according flue gas pipe
length and diameter. See capitel 7.2.
1H failure still exist ? -->5.
yes:
-->5.
5.
Is fan running correct ?
no:
B
Change the fan.
1H failure still exist ? -->6.
yes:
-->6.
