Actuator Control; Suz-Ka50Va3.Th - Mitsubishi Electric SUZ-KA25VA3 Technical & Service Manual

9

ACTUATOR CONTROL

SUZ-KA25VA3.TH
SUZ-KA60VA3.TH
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.
Compressor
Outdoor fan
9-2. R.V. COIL CONTROL
Heating . . . . . . . . . . . . . . . . . ON
Cooling . . . . . . . . . . . . . . . . . OFF
Dry . . . . . . . . . . . . . . . . . . . . OFF
Compressor
R.V.coil
Outdoor fan
motor
9-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR
Sensor
Discharge temperature
thermistor
Indoor coil temperature
thermistor
Defrost thermistor
Fin temperature thermistor
Ambient temperature
thermistor
Outdoor heat exchanger
temperature thermistor
OCH530
SUZ-KA35VA3.TH
SUZ-KA71VA3.TH
5 seconds
ON
OFF
ON
OFF
<COOL>
5 seconds
ON
OFF
ON
OFF
ON
OFF
Purpose
Protection
Cooling: Coil frost prevention
Heating: High pressure protection
Heating: Defrosting
Protection
Cooling: Low ambient temperature operation
Cooling: Low ambient temperature operation
Cooling: High pressure protection

SUZ-KA50VA3.TH

15 seconds
NOTE: The 4-way valve reverses for 5 seconds
right before start-up of the compressor.
<HEAT>
5 seconds
Compressor LEV
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18
Actuator
Outdoor fan Indoor fan
R.V.coil
motor motor
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