Mitsubishi Electronics MSY-ANA manual When the room temperature is under 73F, OFF Onon, Indoor fan

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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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-1.8 deg. -1.3 deg.

2.Indoor fan speed control

Indoor fan operates at the set speed by FAN SPEED CONTROL button. When thermostat OFF (compressor OFF) fan speed becomes Very Low.

In AUTO the fan speed is as follows.

Initial temperature difference Fan speed

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

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

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

3.The operation of the compressor and indoor/ outdoor fan Compressor operates by room temperature control and time control. Set temperature is controlled to fall 4°F from initial room temperature. Indoor fan and outdoor fan operate in the same cycle as the compressor. •When the room temperature is 73°F or over:

When the thermostat is ON, the compressor repeats 8 minutes ON and 3 minutes OFF. When the thermostat is OFF, the compressor repeats 4 minutes OFF and 1 minute ON.

When the room temperature is under 73°F.

When the thermostat is ON, the compressor repeats 2 minutes ON and 3 minutes OFF. When the thermostat is OFF, the compressor repeats 4 minutes OFF and 1 minute ON.

Difference between room temperature and set temper- ature during operation ( T)

4.5 deg.

1.8 deg. 3.1 deg.

Operation time chart Example

ON

ON

Thermostat

OFF

ONON

OFF

ON

Indoor fan

OFF

 

Outdoor fan OFF Compressor

OFF

ONON

OFF

OFF

ON

OFF

8 minutes

3 minutes 4 minutes 1 minute

4.Coil frost prevention

Coil frost prevention is as same as COOL mode. (2-1.3.)

The indoor fan maintains the actual speed of the moment. However ,when coil frost prevention works while the compressor is not operating it’s speed becomes the set speed.

4

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Contents Service Technical Guide Discharge Temperature Protection Control ·····BACK Operational Frequency Control of Outdoor UNIT······16Indoor unit models Outdoor unit models Indoor unit modelsOperation chart ExampleON OperationThermostat control Indoor fan speed controlWhen the room temperature is under 73F Operation time chart ExampleOFF Onon Indoor fanAuto Vane Operation Horizontal vaneLow outside temperature operation Coil frost prevention Temperature controlDifference between room Low outside temperature operation is as same as Cool mode Coil frost prevention is as same as Cool modeOperation MSZ Cold air prevention control MSZ-A09/12/15/17Overload starting DefrostingAuto Change Over ···AUTO Mode Operation MSZ Mode selectionCool Outdoor FAN Motor ControlHeat MUZ Horizontal blow time Function of main parts Inverter System ControlAt normal operation Outline of simple partial switching method Intelligent power moduleMUZ-A24 MUY-A24 Inverter main power supply circuit Purpose of PAM adoptionPower factor improvement PFC Power Factor ControllerPower transistor module Sine wave control Control Method of Rotation TimesOperational Frequency Control of Outdoor Unit Cool Heatmuz DRYCool · DRY Mode Heat Mode MUZExpansion Valve Control LEV Control LEV is fixed to standard opening degree according to operaTime chart MUZ-A09/12/15/17/24 MUY-A15/17/24Degree LEV130/100 190/130 240/170 260/210 260/230 MXZ Microprocessor Control Power factor improvement Temperature is included in standard opening. w1 With discharge temperature was added to basic opening. w1Opening before stop 500 pulse in 15 minutes Cool 5 pulse full closedHeat MXZ-2ACool Heat MXZ-3AMXZ-2A MXZ-3ACool DRY Heat Discharge temperature ˚F Correction pulse More than Target discharge temperature+18More than Target discharge temperature+21.6 Superheat LEV openingOperational Frequency Range Discharge Temperature Protection Control Heat Defrosting ControlOutdoor FAN Control 40Hz
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MUY-ANA, MSY-ANA, MS-AWA, MUZ-ANA, MXZ-ANA specifications

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