C6 Is Flashing - Junkers ZWE 24-5 MFA Service Manual

C6
IS FLASHING
Air pressure switch not closing.
Order Control Step
1.
Check flue pipe for any blockage or
wrong installation
2. Check if air pressure switch hoses are
installed correctly?
3. Check if APS hoses are damaged or
blocked or check if there is
condensation in hoses?
4. C h e c k the mains supply voltage.
Is it < 230 V?
5. Check if APS is working or not
6. Check if the fan is operating or not?
Check if condensation in APS
hose connection points?
6 720 660 238 (2008/07)
Measure
No: ↓ 2.
Yes:
Turn off the appliance
Clean the flue gas pipe or correct the installation
Switch on the appliance
If C6 still flashing ↓ 2.
Yes: Ø 4.
No:
Turn off the appliance
Correct the assembly of APS hoses
Switch on the appliance
If C6 still flashing ↓ 4
Yes: Turn off the appliance
Clean and dry APS hoses.
Switch on the appliance
If C6 still flashing ↓ 4.
No: ↓ 5.
Turn off the appliance
Yes:
Change fan
If C6 still flashing ↓ 5.
No: ↓ 5.
Yes: ↓ 6.
No:
Turn off the appliance
Change APS
Switch on the appliance
If C6 still flashing ↓ 6.
Yes:
Turn off the appliance
Clean and dru Aps hose connection points on the
fan
If C6 still flashing ↓ 7.
No: ↓ 7.
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