Ms-Awa Mu-Awa, Cool Operation | Mitsubishi Electronics MU-AWA

MS MICROPROCESSOR CONTROL

MS-A•WA MU-A•WA

1-1. COOL ( ) OPERATION

1. Thermostat control

Thermostat is ON or OFF by difference between room temperature and set temperature

	Room temperature minus	Room temperature minus
Thermostat	set temperature (Initial)	set temperature (During operation)
ON	-1.8 °F or more
OFF	less than -1.8 °F

		-1.8 °F -1.3 °F
		-1.8 °F -1.3 °F

2.Indoor fan speed control

Indoor fan operates continuously at the set speed by FAN SPEED CONTROL button regardless of the thermostat’s OFF- ON.

In AUTO the fan speed is as follows.	Room temperature minus	Room temperature minus
Fan speed	Room temperature minus	Room temperature minus
Fan speed	set temperature (Initial)	set temperature (During operation)
High	3.1 °F or more
High	3.1 °F or more
Med.	between 1.8 and 3.1 °F
Med.	between 1.8 and 3.1 °F
Low	less than 1.8 °F		5.4 °F


		1.8 °F 3.1 °F

3.Coil frost prevention

Temperature control

When the indoor coil thermistor RT12 reads 37 °F or below the coil frost prevention mode starts immediately. However, the coil frost prevention doesn’t work for 5 minutes since the compressor has started.

The indoor fan operates at the set speed and the compressor stops for 5 minutes.

After that, if the indoor coil thermistor still reads below 37 °F, this mode is prolonged until the indoor coil thermistor reads over 37 °F.

Time control

When the three conditions as follows have been satisfied for 1 hour and 45 minutes, compressor stops for 3 minutes.

a.Compressor has been continuously operating.

b.Indoor fan speed is Low or Med.

c.Room temperature is below 79 °F.

When compressor stops, the accumulated time is cancelled and when compressor restarts, time counting starts from the beginning.

Time counting also stops temporarily when the indoor fan speed becomes High or the room temperature exceeds 79 °F. However, when two of the above conditions (b. and c.) are satisfied again. Time accumulation is resumed.

Operation chart

Example

Compressor	ON
	ON

Outdoor fan	OFF
	OFF
Indoor fan	ON	( Continuously at set speed)
Indoor fan	ON

1-2. DRY ( ) OPERATION

Set temperature is as shown on the right chart.

The system for dry operation uses the same refrigerant circuit as the cooling circuit.

The compressor and the indoor fan are controlled by the room tem- perature.

By such controls, indoor flow amounts will be reduced in order to lower humidity without much room temperature decrease.

	°F	Set temperature and
	°F	initial room temperature in dry mode
	95
	86
temperature	77
temperature	68
Set
	59
	5050		59	68	77	86	95 °F
			Initial room temperature

MSZ-FDNA, MUZ-FDNA - U, MUZ-FDNA, MUZ-ANA - U, MUY-ANA specifications

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