Mitsubishi Electronics MUZ-GE18NA Actuator Control, Outdoor FAN Motor Control, Coolheat

8 ACTUATOR CONTROL

MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA

MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA

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.

5 seconds 15 seconds

ON

Compressor

OFF

ON

Outdoor fan motor

OFF

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.

<COOL><HEAT>

		5 seconds				5 seconds
Compressor	ON
	OFF
R.V.coil	ON
	OFF
Outdoor fan ON
motor	OFF
8-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR
Sensor		Purpose					Actuator
			Compressor		LEV		Outdoor fan	R.V.coil		Indoor fan
							motor		(MUZ)	motor
Discharge temperature	Protection			○	○
thermistor
Indoor coil temperature	Cooling: Coil frost prevention			○
	tion			○	○
thermistor
	Heating: High pressure protec-
Defrost thermistor (MUZ)	Heating: Defrosting			○	○		○		○	○
Fin temperature thermistor	Protection			○			○
Ambient temperature	Cooling: Low ambient tempera-			○	○		○
thermistor	ture operation
	Cooling: Low ambient tempera-			○	○		○
Outdoor heat exchanger tem-	ture operation
perature thermistor	tion			○	○		○
	Cooling: High pressure protec-

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