Actuator Control - Mitsubishi Electric SUZ-SWM30VA TH Series Service Manual

ACTUATOR CONTROL

8
8-1. 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.
8-2. R.V. COIL CONTROL
Heating . . . . . . . . . . . . . . . . . ON
Cooling . . . . . . . . . . . . . . . . . OFF
Dry . . . . . . . . . . . . . . . . . . . . OFF
NOTE: The 4-way valve reverses for 5 seconds right before startup of the compressor.
Compressor
R.V.coil
Outdoor fan
motor
8-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR
Sensor
Discharge temperature
Protection
thermistor
Cooling: Coil frost prevention and
Pressure sensor and plate
water freeze prevention
heat exchanger thermistor
Heating: High pressure protection and
in indoor unit
water freeze prevention at defrosting
Defrost thermistor Heating: Defrosting
Fin temperature thermistor Protection
Cooling: Low ambient temperature
operation
Ambient temperature
thermistor
Heating: Start operation and
defrosting (Heater)
Cooling: Low ambient temperature
Outdoor heat exchanger
operation
temperature thermistor
Cooling: High pressure protection
OCH796A
5 seconds
ON
Compressor
OFF
ON
Outdoor fan
motor
OFF
<COOL>
5 seconds
ON
OFF
ON
OFF
ON
OFF
Purpose
15 seconds
<HEAT>
5 seconds
Outdoor fan
Compressor LEV
motor
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20
Actuator
Defrost heater
R.V. coil
*Only VAH model
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