Like the heat pump and air conditioner, the conversion between refrigeration and heating is controlled by four way valve. I don't understand. When is the heating system energized or is it energized when it is cooled? Please master help Oh!
Just once in the conversion process, the switch will be cut off
Same as ordinary household air conditioners. He does not have the normal refrigeration work, only when winter defrost, the four way valve does not work, the fan does not turn.
Most of the heat pump water heater is heating work state, at this time, the four way valve is energized
