WATERSTAGE™ (Air to Water) What is Automatic Defrosting Operation for? (Outdoor unit)

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With low outdoor temperature in combination with high air humidity water turns into ice crystals due to a low surface temperature at the heat exchanger . If this increases to much, this will reduce the efficiency.

To avoid this situation an automatic defrost operation is implemented. At this time the melted ice will come out of the unit.

"WATERSTAGE" is a trademark of Fujitsu General Limited.