Error code
Viessmann damper All models code C9
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Meaning
■ One of the following events has occurred: - High pressure limit was exceeded 3 times within 60 min (Vitocal 100-S/111-S only). - Low pressure limit was undershot twice within 40 min (Vitocal 100-S/111-S only). - Flow switch has responded 9 times. - Compressor was switched off by the refrigerant cir- cuit controller 9 times. - Defrosting process was terminated. Note The event counter is reset as soon as the compressor has been operational continuously once for "Opti- mum runtime compressor 500A". ■ Safety chain is interrupted for more than 24 h. ■ Event that leads to the compressor being switched off is active for more than 24 h. ■ Primary/secondary circuit flow and return temperature sensors are simultaneously faulty for more than 24 h
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