SiK401004_AFUNCTION CONTROL 342.3 Heating ModeHeating mode operation is as follows.T amb≤T set -1C: Heating mode will be entered. The compressor and outdoor unit fan willrun and indoor unit fan will run at setting speed and the mode of cold-blast air prevention.T amb≥T set +1C: The compressor and outdoor unit fan will stop but the 4-way valve will bestill energized. Indoor unit fan will run at the mode of blowing surplus heat.T set -1C amb set +1C: Previous running status will be kept.(running atblowingsurplus heat)(running whenmeetingcondition)Manual