3
Failures / Errors
GB012 - 25K
9
3.3
Failure codes and corrections steps
4C
is flashing.
Overheat lock-out by temperatur limiters (2 x STB : Flue gas + prim. Heatexchanger). In this case ; Heat
demands is blocked and pump stops 3 minutes later.
Control Step
Action
1.
Is the system pressure between 1 - 2
bar?
yes:
-->2.
no:
B
Fill water in sysytem.
B
Bleed the system
1)
.
B
Press RESET button and restart again.
4C failure still exist? -->2.
2.
Is the circulation pump blocked ?
yes:
B
Eliminate the blockage (turn the shaft).
If not succesful :
B
Switch off the appliance.
B
Cut mains supply.
B
Drain the water from appliance.
B
Change the pump.
B
Fill with water and bleed the system again.
B
Connect to main supply.
B
Switch on the appliance.
B
Press RESET button and restart again.
4C failure still exist? -->3.
no:
-->3.
3.
Check the flue gas pipe line.
Is there any blockage ?
yes:
B
Check the flue gas pipe and remove the block-
age.
B
Switch on the appliance.
B
Cihazý resetleyip yeniden çalýþtýrýn.
4C failure still exist? -->4.
no:
-->4.
4.
Check the recuperator.
Is there any blockage?
yes:
B
Clean the recuperator. Replace if necessary.
B
Switch on the appliance.
B
Press RESET button and restart again.
4C failure still exist? -->5.
no:
-->5.
5.
B
Switch off the appliance.
B
Check the temperature limiter
(STB) on recuperator.
Ist the circuit open or wrong
installed ?
no:
-->6.
yes:
B
Change the temperature limiter (STB) or correct
the installation.
B
Switch on the appliance.
-->6.
