Article reference KA-01870
If F ˉ is shown on the heater as follows, it means the heater is downloading a firmware update. Please leave the heater switched on. Once the update is completed, it will go back to normal operation.
Applicable to models:
Capa Connect App, DTD2R 05, DTD2R 07, DTD2R 10, DTD2R 12, DTD4R 05, DTD4R 07, DTD4R 10, DTD4R 15, DTD4R 20