SiUS121602E Control SpecificationFunction and Control 673.9 Outdoor Fan Control1. Fan ON control to cool down the electrical boxThe outdoor fan is turned ON when the electrical box temperature is high while the compressor isOFF.2. Fan OFF control during defrostingThe outdoor fan is turned OFF while defrosting.3. Fan OFF delay when stoppedThe outdoor fan is turned OFF 60 seconds after the compressor stops.4. Fan speed control for pressure difference upkeepThe rotation speed of the outdoor fan is controlled for keeping the pressure difference duringcooling operation with low outdoor temperature. When the pressure difference is low, the rotation speed of the outdoor fan is reduced. When the pressure difference is high, the rotation speed of the outdoor fan is controlled as wellas normal operation.5. Fan control when the number of heating room decreasesWhen the outdoor temperature is more than 10°C (50°F), the fan is turned off for 30 seconds.6. Fan speed control during forced operationThe outdoor fan is controlled as well as normal operation during the forced operation.7. Fan speed control during POWERFUL operationThe rotation speed of the outdoor fan is increased during the POWERFUL operation.8. Fan speed control during indoor/outdoor unit quiet operationThe rotation speed of the outdoor fan is reduced by the command of the indoor/outdoor unit quietoperation.9. Fan ON/OFF control when operation (cooling, heating, dry) starts/stopsThe outdoor fan is turned ON when the operation starts. The outdoor fan is turned OFF when theoperation stops.3.10 Liquid Compression Protection FunctionOutline The compressor stops according to the outdoor temperature for protection.Detail Operation stops depending on the outdoor temperature.The compressor turns off under the conditions that the system is in cooling operation and theoutdoor temperature is below –12°C (10.4°F).
