... automatic and heating-keeping-cooling divide period to control. 9)Auto tracking frequency ,the power can infinitely variable control 10) ... body: 110KGTransformer: 78KG2.Feature:1)digital auto-control, it has the function of manual, semi=auto,full-auto, heating-keeping-cooling device period to ... , over-current,lack of water, phase fail,etc.3)auto frequency tracking, the power can be adjusted to maximum.4 ...