Mitsubishi Electric SUZ-KA71VA4 Service Manual download pdf (Page 19)

1919

ACTUATOR CONTROL

SUZ-KA25VA4.TH SUZ-KA35VA4.TH SUZ-KA50VA4.TH

SUZ-KA60VA4.TH

SUZ-KA71VA4.TH

9-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR

9-2. R.V. COIL CONTROL

Heating

. . . . . . . . . . . . . . . . .

Cooling . . . . . . . . . . . . . . . . . OFF

Dry

. . . . . . . . . . . . . . . . . . . .

OFF

Outdoor fan

Compressor

5 seconds 15 seconds

OFF

Compressor

Outdoor fan

motor

R.V.coil

OFF

<COOL>

5 seconds

<HEAT>

5 seconds

9-1. OUTDOOR FAN MOTOR CONTROL

The fan motor turns ON/OFF, interlocking with the compressor.

[ON] The fan motor turns ON 5 seconds before the compressor starts up.

[OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running.

NOTE: The 4-way valve reverses for 5 seconds

right before start-up of the compressor.

Sensor Purpose

Actuator

Compressor

LEV

Outdoor fan

motor

R.V.coil

Indoor fan

motor

Discharge temperature

thermistor

Protection



Indoor coil temperature

thermistor

Cooling: Coil frost prevention



Heating: High pressure protection



Defrost thermistor Heating: Defrosting



Fin temperature thermistor Protection



Ambient temperature

thermistor

Cooling: Low ambient temperature operation



Outdoor heat exchanger

temperature thermistor

Cooling: Low ambient temperature operation



Cooling: High pressure protection



OCH545

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Mitsubishi Electric SUZ-KA71VA4 Service Manual Page 19

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