Bongard OPTICOM BFA Notice D'utilisation page 31

E.
Automatic de-icing mode
Ask your technician. Running during the fermentation phase (about every 6 hours, if
temperature <5°C).
NU OPTICOM Control BFA - BFC
V1.2 of 26/07/05 Ref. 37090291
2 0
Alternately
1 2 5 4
└ 2 ┐
1 2 5 4
Alternately
Use
15