Actuator Control - Mitsubishi Electric Mr. Slim MUZ-D30NA Service Manual

8

ACTUATOR CONTROL

MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA
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.
Compressor
Outdoor fan
motor
8-2. R.V. COIL CONTROL
<MUZ>
Heating . . . . . . . . . . . . . . . . . ON
Cooling . . . . . . . . . . . . . . . . . OFF
Dry . . . . . . . . . . . . . . . . . . . . OFF
NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor.
R.V.coil
Outdoor fan
motor
8-3. Relation between main sensor and actuator
Sensor
Discharge temperature thermistor
Indoor coil temperature thermistor
Defrost thermistor
Fin temperature thermistor
Outdoor heat exchanger temperature
Ambient temperature thermistor
5 seconds
ON
OFF
ON
OFF
<COOL>
5 seconds
ON
ON or OFF
OFF
ON
OFF
Purpose
Protection
Cooling: Coil frost prevention
Heating: High pressure protection
Defrosting
Protection
Protection
Cooling: Low ambient temperature operation
15 seconds
<HEAT>
5 seconds
ON or OFF
Compressor LEV
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20
Actuator
Outdoor Indoor
R.V. coil
fan motor fan motor
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