Argoclima AER522SCL3 Manual de servicio descargar pdf (Pagina 55)

8-4 LOW AMBIENT FAN SPEED CONTROL < FOR AER518SCL3 >

●

This function protects the compressor from being damaged due to flowback of the liquid refrigerant to the

compressor when the outdoor temperature is very low.

●

When the air temp. thermistor (TH4) on the outdoor units detects a change in temperature, the solid state relay

(SSR) inside the electrical component box activates to control the fan speed accordingly.

●

As the outdoor temperature decreases and drops below 28.0°C, the outdoor fan speed starts to gradually slow

down following an oblique line as in the diagram below.

●

Outdoor fan speed changes more or less according to the room temperature.

●

When the outdoor temperature goes above 30.0°C, this fan speed control does not work.

Conditions: Room temperature 19.4°C DB/13.9°C WB

800

1000

600

400

200

–10 –5 0 5 10 15 20 25 30 35

28.0

30.0

900 rpm

(HIGH)

Outdoor ambient temperature (°C)

Outdoor fan speed (rpm)

Coil temp.

thermistor

(TH3)

Air temp.

thermistor (TH4)

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 81 82

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Argoclima AER522SCL3 Manual de servicio Pagina 55