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ecoTEC Pro 24 Combi
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F.70
F.70
Fault: Invalid Device Specific Number
Vaillant ecoTEC Pro 24 Combi
Possible cause
Incorrect/missing Device Specific Number or incorrect/missing coding resistor
Measure
If the display and PCB have been replaced, change the Device Specific Number under D.93.
This code also applies to:
ecoTEC Pro 28 Combi
ecoTEC Pro 30 Combi
Source:
Manufacturer manual (PDF)
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