Mitsubishi Electronics MUY-ANA Operational Frequency Control of Outdoor Unit, Cool Heatmuz DRY

Page 16

2-8. OPERATIONAL FREQUENCY CONTROL OF OUTDOOR UNIT

1.Outline

The operational frequency is as following:

First, the target operational frequency is set based on the difference between the room temperature and the set tem- perature.

Second, the target operational frequency is regulated by discharge temperature protection, high pressure protection, electric current protection and overload protection and also by the maximum/minimum frequency.

2.Maximum/minimum frequency in each operation mode.

 

COOL

HEAT(MUZ)

DRY

Applied

 

 

 

 

 

 

Minimum

Maximum

Minimum

Maximum

Minimum

Maximum

model

 

frequency

frequency

frequency

frequency

frequency

frequency

 

 

 

 

 

 

 

MUZ-A09

32

70

32

76

32

57

 

 

 

 

 

 

 

MUZ-A12

32

73

32

71

32

57

 

 

 

 

 

 

 

MUZ-A15

10

82

15

93

10

68

MUY-A15

 

 

 

 

 

 

 

 

 

 

 

 

 

MUZ-A17

10

87

15

93

10

68

MUY-A17

 

 

 

 

 

 

 

 

 

 

 

 

 

MUZ-A24

15

110

15

108

15

102

MUY-A24

 

 

 

 

 

 

 

 

 

 

 

 

 

wThe operation frequency in COOL mode is restricted the upper limit frequency after 1 hour as shown below for dew prevention.

It is rated frequency or less.

Upper limit

frequency

Maximum

frequency

1 hour

Rated frequency or less

Time

16

Image 16
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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