Mitsubishi Electronics MSZ-FDNA, MS-AWA, MUZ-ANA - U manual Msz-Ana Msy-Ana Msz-Fdna Msy-Dna Msz-Dna

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2

MSZ,MSY MICROPROCESSOR CONTROL

MSZ-A•NA MSY-A•NA MSZ-FD•NA MSY-D•NA MSZ-D•NA

2-1. COOL ( ) OPERATION

MUZ-A•NA MUY-A•NA MUZ-FD•NA MUY-D•NA MUZ-D•NA

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

 

 

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.

MSZ-A MSY-A

MSZ-FD MSZ-D MSY-D

Fan speed

Room temperature minus

Room temperature minus

set temperature (Initial)

set temperature (During operation)

High

3.1 °F or more

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Med.

between 1.8 and 3.1 °F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low

less than 1.8 °F

 

 

 

 

 

5.4 °F

 

 

 

 

 

1.8 °F

 

 

 

3.1 °F

Fan speed

Room temperature minus

Room temperature minus

set temperature (Initial)

set temperature (During operation)

High

2.7 °F or more

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Med.

between 1.8 and 2.7 °F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low

less than 1.8 °F

 

 

 

 

 

5.4 °F

 

 

 

 

 

1.8 °F

 

 

 

2.7 °F

3.Coil frost prevention

The compressor operational frequency is controlled to prevent the temperature of indoor heat exchanger from falling exces- sively.

The compressor is turned OFF for 5 minutes when the temperature of indoor coil thermistor continues 37 °F or less for 5 minutes or more.

The indoor fan maintains the actual speed of the moment.

4.Low outside temperature operation

If the outside temperature falls to 64 °F or less during operation in COOL mode, the unit will switch to the low outside tem- perature operation mode.

<Operation>

(1)Outdoor fan control

The outdoor fan rotation speed slows down to maintain sufficient cooling capacity.

NOTE: Even when the unit is in the "thermostat-off" status under the low outside temperature operation mode, the out- door fan rotation does not stop.

(2)Dew drop prevention

When the ambient temperature thermistor reads 10 °F (MUZ-AMUY-AMUZ-DMUY-D), -4 °F (MUZ-FD) or less, as coil frost or dew drop from indoor unit may occur, the compressor turns OFF with the outdoor fan ON for prevention of them.

(3)Outdoor temperature detecting control

To detect the exact outdoor temperature in this mode, the compressor turns OFF but the outdoor fan stays ON for 3 minutes once 1 hour. If the outdoor temperature rises over 64 °F, the unit goes back to the normal COOL mode. If the outside temperature stays below 64 °F, the unit continues to run in the low outside temperature operation mode.

Other protections work as well as in the normal COOL mode.

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Contents Revised EDITION-B ContentsRevision a MXZ-2A20NA MXZ-3A30NA MXZ-4A36NA MS-A09WA MU-A09WA MS-A12WA MU-A12WACool Operation MS-AWA MU-AWAOperation time chart Example When the room temperature is under 73 FHorizontal vane Auto Vane OperationMSZ-A MSY-A MSZ-FD MSZ-D MSY-D Low outside temperature operationMSZ-ANA MSY-ANA MSZ-FDNA MSY-DNA MSZ-DNA MUZ-ANA MUY-ANA MUZ-FDNA MUY-DNA MUZ-DNAHeat Operation MSZ Defrosting MSZ-A24Gradation of fan speed in initial Overload startingMode selection Auto Change Over ··· Auto Mode Operation MSZMUZ-A MUY-A Outdoor FAN Motor ControlMUZ-FD MUZ-D MUY-D MUZ-FD Inverter System ControlFunction of main parts MUZ-A24 MUY-A24 MUZ-D MUY-D Input current waveform without PAM Outline of simple partial switching methodAt normal operation Purpose of PAM adoptionElimination of electrical noise Intelligent power moduleCompressor Control Method of Rotation Times Sine wave controlMUZ-FD09 Operational Frequency Control of Outdoor UnitMUZ-FD12 Pulse MUZ-A09/12/15/17 MUY-A15/17 Cool · DRY ModeHeat Mode Expansion Valve Control LEV ControlMUZ-A24 MUZ-A09/12MUZ-A15/17 MUY-A15/17260 MXZ-ANA Inverter main power supply circuitProtects transistors from over current Opening before stop → 500 pulse in 15 minutes MXZ-3A30NA MXZ-2A20NA/3A30NAMXZ-2A20NA Cool HeatMXZ-3A30NA MXZ-2A20NAMXZ-4A36NA MXZ-2A20NA Exclusive LEVReceiver LEV MXZ-3A30NA Exclusive LEVCool DRY Heat MXZ-3A MXZ-4A MXZ-2A20NAMXZ-3A30NA MXZ-2A∆RT Operational Frequency RangeMXZ-4A Discharge Temperature Protection ControlHeat Defrosting Control Outdoor FAN ControlPRE-HEAT Control MXZ-2A20NA- 1 MXZ-3A30NA MXZ-4A36NA Made in Japan DRY OperationHeat Operation High pressure protection
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MSZ-FDNA, MUZ-FDNA - U, MUZ-FDNA, MUZ-ANA - U, MUY-ANA specifications

Mitsubishi Electronics has long been a leader in the HVAC (heating, ventilation, and air conditioning) industry, consistently delivering cutting-edge technology and innovative solutions. The MUZ-ANA, MUZ-ANA - U, MU-AWA, MUZ-FDNA, and MS-AWA models exemplify the company's commitment to efficiency, comfort, and advanced engineering.

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