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11. Operation Control
11.1 Cooling Operation
11.1.1 Outdoor fan control
When cooling operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted
according to figure below:
11.1.2 Annual Cooling control
This control is to enable cooling operation when outdoor ambient temperature is low.
Control start conditions:
o Cooling operation is activated with compressor ON.
o Outdoor ambient temperature is less than 59°F
Control contents:
o When the above conditions are fulfilled, based on outdoor pipe temperature, the outdoor fan motor will
operate according to figure below:
To improve the judgment accuracy during annual cooling control, outdoor ambient temperature sampling for
2 minutes will be activated every 35 minutes under designated fan speed.
Control stop conditions:
o When either one of the start conditions are not complied.
