SiUS091601E Control SpecificationFunctions and Control 443.3.3 Four Way Valve Operation CompensationOutline At the beginning of operation as the four way valve is switched, the pressure difference to activatethe four way valve is acquired when the output frequency is higher than a certain fixed frequency,for a certain fixed time.Detail Starting Conditions1. When the compressor starts and the four way valve switches from OFF to ON2. When the four way valve switches from ON to OFF during operation3. When the compressor starts after resetting4. When the compressor starts after the fault of four way valve switchingThe lower limit of frequency keeps A Hz for B seconds with any conditions 1 through 4 above.When the outdoor temperature is above C °C in heating, the frequency decreases depending onthe outdoor temperature.3.3.4 3-Minute StandbyTurning on the compressor is prohibited for 3 minutes after turning it off.(The function is not activated when defrosting.)3.3.5 Compressor Protection FunctionWhen turning the compressor from OFF to ON, the upper limit of frequency is set as follows.(The function is not activated when defrosting.)+: Values refer to 15 class only, when outside temperature is lower than -15°C (5°F)09 class 12 class 15 classCooling Heating Cooling Heating Cooling HeatingA (Hz) 40 54 24 34 48B (seconds) 60 60 70C (°C) 10 10 15(°F) 50 50 5909 class 12 class 15 class 15 class +A (Hz) 40 24 52 35B (Hz) 54 34 68 52C (Hz) 72 44 80 62D (Hz) 90 56 98 80E (Hz) 100 78 — 100F (seconds) 180 180 300 1300G (seconds) 420 420 200 250H (seconds) 180 180 460 300J (seconds) 120 120 200 200K (seconds) 400 180 — 120(sec.)Time(R23251)(Hz)FrequencyCDEBF G H J KA
