Mitsubishi Electronics MUZ-ANA, MS-AWA Opening before stop 500 pulse in 15 minutes, Some operate

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3-2. EXPANSION VALVE CONTROL (LEV CONTROL)

Linear expansion valve (LEV) is controlled by "Thermostat ON" commands given from each unit.

Indoor unit status

LEV opening

Stop of all indoor unit

Opening before stop ➝ 500 pulse in 15 minutes

When outdoor unit is operating,

COOL : 5 pulse (full closed)

some indoor units stop and

HEAT :140 pulse (slightly opened)

some operate.

 

 

 

Thermostat OFF in

When the outdoor unit operates (When the other indoor unit operates): 5 pulse.

When outdoor unit stops. (When the other indoor unit stops or thermo off):

COOL or DRY mode

Maintain LEV opening before stop ➝ 500 pulse in 15 minutes

 

 

 

 

• LEV opening for each indoor unit is determined by adding adjustment in accordance

 

with the number of operating unit and the capacity class to standard opening, based

 

on the operation frequency:

 

Ex.) Opening 130 pulse in standard opening 1 ➝ Minimum 80 pulse, Maximum 205

Thermostat ON in

pulse. (Capacity code 4 at 1 unit operation) (Capacity code 1 at 3 units operation)

• After starting operation, adjustment in accordance with intake super heat, discharge

COOL or DRY mode

temperature is included in standard opening. w1

 

 

Note: LEV opening in each frequency at DRY operation and COOL operation is the

 

same. However, velocity and compressor operation frequency controls are

 

different. See 2-3. OPERATIONAL FREQUENCY RANGE

 

(As far as the indoor unit velocity control goes, refer to DRY operation in

 

MICROPROCESSOR CONTROL in indoor unit.)

 

 

 

• When the outdoor unit operates. (When the other indoor unit operates): 140pulse .

Thermostat OFF in HEAT mode

• When the outdoor unit stops. (When the other indoor unit stops or thermo off):

Maintain LEV opening before stop ➝ 500 pulse in 15 minutes.

 

 

 

 

• LEV opening for each indoor unit is determined by adding adjustment in accordance

 

with the number of operating unit and the capacity class to standard opening, based

 

on the operation frequency:

Thermostat ON in HEAT mode

Ex.) Opening 120 pulse in standard opening 1 ➝ Minimum 70 pulse, Maximum 165

 

pulse. (Capacity code 4 at 1 unit operation) (Capacity code 1 at 3 units operation)

 

• After starting operation, opening becomes the one that adjustment in accordance

 

with discharge temperature was added to basic opening. w1

 

 

w1 LEV opening when the outdoor unit is operating: Upper limit 500 pulse, Lower limit 53pulse.

Determination of LEV standard opening in each indoor unit

• The standard opening is on the straight line, which connects an each standard point in the section where divided into seven according to the operation frequency of compressor as shown in the figure below.

(LEV opening is controlled in proportion to the operation frequency.)

Note: Opening is adjusted at the standard opening according to the indoor unit conditions.

However, inclination of standard opening in each point of opening does not change with the original curve.

•Add opening provided in Difference in Capacity in the table below to the standard opening from 1 to 8, when capacity of the indoor unit is excluding code 1.

•Add opening provided in Difference in Operation number in the table below to determined LEV opening for each indoor unit, when 2 or 3 indoor units are operated at the same time.

Note: Even when the adjusted standard opening exceeds the driving range from 59 to 500 pulse, actual driving output opening is in a range from 59 to 500 pulse.

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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 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 Overload starting Cold air prevention controlMSZ-A09/12/15/17 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 MUZ-A24 MUY-A24 Inverter main power supply circuit Outline of simple partial switching methodIntelligent power module 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 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
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Manual 32 pages 53.72 Kb

MUY-ANA, MSY-ANA, MS-AWA, MUZ-ANA, MXZ-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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