Mitsubishi Electronics MXZ-ANA Difference between room, Coil frost prevention Temperature control

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MSZ,MSY MICROPROCESSOR CONTROL

MSZ-A09NA MSY-A15NA MUZ-A09NA MUY-A15NA

 

 

 

 

 

 

 

 

 

 

 

MSZ-A12NA MSY-A17NA MUZ-A12NA MUY-A17NA

 

 

 

 

 

 

 

 

 

 

 

MSZ-A15NA MSY-A24NA MUZ-A15NA MUY-A24NA

 

 

 

 

 

 

 

 

 

 

 

MSZ-A17NA

MUZ-A17NA

 

 

 

 

 

 

 

 

 

 

 

MSZ-A24NA

MUZ-A24NA

 

 

 

 

 

 

 

 

 

 

 

2-1. COOL (

) OPERATION

 

Difference between room

 

 

 

1. Thermostat control

 

temperature and set temper-

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

ature during operation.

 

Initial temperature difference

Thermostat Set temperature

Room temperature minus set temperature : -1.8 degrees or more·····································ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Room temperature minus set temperature : less than -1.8 degrees···································OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-1.8deg. -1.3deg.

2. Indoor fan speed control

 

Indoor fan operates continuously at the set speed by FAN SPEED CONTROL button

Difference between room

regardless of the thermostat’s OFF-ON.

 

temperature and set temper-

In AUTO the fan speed is as follows.

Fan speed

ature during operation ( T)

 

Initial temperature difference

Room temperature minus set temperature : 3.1 degrees or more ·······························High

 

 

 

 

 

 

 

 

 

 

Room temperature minus set temperature : Between 1.8 and 3.1 degrees ···················Med.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Room temperature minus set temperature : less than 1.8 degrees ····························Low

 

 

 

 

 

 

5.4deg.

 

 

 

 

 

 

 

 

 

 

1.8deg. 3.1deg.

 

 

 

3.Coil frost prevention Temperature control

When indoor coil thermistor detects following temperature for 90 seconds, operational frequency of compressor is controlled according to the following table.

Temperature of indoor coil thermistor

Operation frequency

 

 

50°F or more

Normal (variable)

 

 

46°F to 50°F

Raise 6Hz

 

 

43°F to 46°F

Fixed

 

 

37°F to 43°F

Lower 3Hz

 

 

 

Lower 6Hz

37°F or less

Compressor is turned OFF for 5 minutes when 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 enters the low outside temperature operation mode.

<Operation>

(1)If the unit enters the low outside temperature operation mode, the outside fan rotation speed gets slow down.

(2)Even when the unit is in the "thermostat-off" status under the low outside temperature operation mode, the outside fan rotation does not stop.

(3)In this mode to detect the exact outside temperature the compressor turns OFF with the outdoor fan ON for 3 minutes once 1 hour; if the outside temperature rises over 64°F, the unit goes back to the normal COOL mode, and if the outside temperature is still 64°F or less, the unit stays in the low outside temperature operation mode.

(4)Dew drop prevention

When the ambient temperature thermistor RT65 reads 10°F 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.

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

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Contents Service Technical Guide Indoor unit models Outdoor unit models Discharge Temperature Protection Control ·····BACKOperational Frequency Control of Outdoor UNIT······16 Indoor unit modelsThermostat control Operation chart ExampleONOperation Indoor fan speed controlOFF Onon When the room temperature is under 73FOperation time chart Example Indoor fanAuto Vane Operation Horizontal vaneCoil frost prevention Temperature control Low outside temperature operationDifference between room Coil frost prevention is as same as Cool mode Low outside temperature operation is as same as Cool modeOperation MSZ Overload starting Cold air prevention controlMSZ-A09/12/15/17 DefrostingAuto Change Over ···AUTO Mode Operation MSZ Mode selectionOutdoor FAN Motor Control CoolHeat MUZ Horizontal blow time Inverter System Control Function of main partsAt normal operation MUZ-A24 MUY-A24 Inverter main power supply circuit Outline of simple partial switching methodIntelligent power module Purpose of PAM adoptionPFC Power Factor Controller Power factor improvementPower transistor module Sine wave control Control Method of Rotation TimesOperational Frequency Control of Outdoor Unit Cool Heatmuz DRYExpansion Valve Control LEV Control Cool · DRY ModeHeat Mode MUZ LEV is fixed to standard opening degree according to operaDegree Time chartMUZ-A09/12/15/17/24 MUY-A15/17/24 LEV130/100 190/130 240/170 260/210 260/230 MXZ Microprocessor Control Power factor improvement Opening before stop 500 pulse in 15 minutes Temperature is included in standard opening. w1With discharge temperature was added to basic opening. w1 Cool 5 pulse full closedCool Heat HeatMXZ-2A MXZ-3AMXZ-2A MXZ-3ACool DRY Heat More than Target discharge temperature+21.6 Discharge temperature ˚F Correction pulseMore than Target discharge temperature+18 Superheat LEV openingOperational Frequency Range Outdoor FAN Control Discharge Temperature Protection ControlHeat Defrosting Control 40Hz
Related manuals
Manual 32 pages 53.72 Kb

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