3
Failures / Errors
GB012 - 25K
17
CL
is flashing.
DHW (Domestic Hot Water) NTC not installed correctly or defect.
The appliance doesn’ t run in summer mode. It works in winter mode and shows the failure code with
alternately.
Control Step
Action
1.
Check the DHW NTC whether it is cor-
rect installed or not.
CL failure still exist ? -->2.
2.
Check if water NTC damaged or not ?.
B
Switch off the appliance.
B
Pull out NTC cables.
B
Measure resistance of NTC (Ohm).
Is the NTC resistance value OK ?
yes:
B
Change the cable harnness.
B
Switch on the appliance.
CL failure still exist ? -->3.
no:
-->4.
3.
Check if cable damaged or not.
B
In case of NTC is cahnged :
- Pull the NTC cables out.
- Measure NTC resistance.
- Reconnect the NTC cable.
B
Switch off the appliance.
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 harnness.
B
Switch on the appliance.
CL failure still exist ? -->4.
no:
-->4.
4.
Check the DHW circuit in main heat
exchanger whether it is calcified or
not.
B
In case of calcification, clean it with special pump.
If necessary change the heat exchanger.
CL failure still exist ? -->5.
5.
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.
