Mitsubishi Electronics MUY-ANA, MS-AWA, MUZ-ANA, MU-AWA, MSY-ANA manual MXZ-2A, Cool Heat, MXZ-3A

Page 23

The table below shows the role of Exclusive LEV and Receiver LEV in each operation mode.

 

Circulation

Capacity

Discharge

High

wEvaporation

 

Amount

Temperature

Pressure

Temperature

 

Distribution

 

Control

Protection

Protection

Protection

 

 

COOL

Exclusive LEV

 

 

 

 

Receiver LEV

 

 

 

 

 

 

 

 

 

HEAT

Exclusive LEV

 

 

 

 

Receiver LEV

 

 

 

 

 

 

 

 

 

Indoor heat

Exclusive

exchanger

LEV

(MXZ-3A)

Outdoor heat exchanger

Receiver

Receiver

LEV

wIn COOL mode, the two indoor coil thermistor (one main and one sub) sense temperature ununiformity (super heat) at the heat exchanger, and when temperature difference have developed, the indoor coil thermistors adjust LEV opening to dimin- ish the super heat.This action is called Evaporation Temperature Protection.

The opening pulse of the Receiver LEV is fixed to the standard No.3 in cooling operation, and so is that of each Exclusive LEV in heating operation.

However the opening pulse will be changed to the standard No.4 or No.5 when the discharge temperature protection or high- pressure protection is working.

In addition to that, it will also be changed to standard No.2 or No.1 when the opening pulse of the each Exclusive LEV becomes 100 pulse or less in cooling operation or so does that of Receiver LEV in heating operation.

<MXZ-2A>

 

 

 

 

 

 

Number of

 

 

LEV opening (pulse)

 

 

operating

 

COOL

 

 

HEAT

 

indoor units

 

 

 

 

Standard No.

1 unit

 

2 units

1 unit

 

2 units

1

200

 

150

120

 

120

2

300

 

320

140

 

140

3

400

 

360

160

 

160

4

450

 

410

220

 

220

5

500

 

500

280

 

280

<MXZ-3A>

 

 

 

 

 

 

Number of

 

 

LEV opening (pulse)

 

 

operating

 

COOL

 

 

HEAT

 

indoor units

 

 

 

 

Standard No.

1 unit

2 units

3 units

1 unit

2 units

3 units

1

150

250

250

250

250

250

2

250

320

320

300

300

300

3

350

360

370

450

380

380

4

400

410

420

460

400

390

5

450

460

470

470

450

440

23

Image 23
Contents Service Technical Guide Indoor unit models Discharge Temperature Protection Control ·····BACKOperational Frequency Control of Outdoor UNIT······16 Indoor unit models Outdoor unit modelsIndoor fan speed control Operation chart ExampleONOperation Thermostat controlIndoor fan When the room temperature is under 73FOperation time chart Example OFF OnonHorizontal vane Auto Vane OperationDifference between room Coil frost prevention Temperature controlLow outside temperature operation Operation MSZ Coil frost prevention is as same as Cool modeLow outside temperature operation is as same as Cool mode Defrosting Cold air prevention controlMSZ-A09/12/15/17 Overload startingMode selection Auto Change Over ···AUTO Mode Operation MSZHeat MUZ Outdoor FAN Motor ControlCool Horizontal blow time At normal operation Inverter System ControlFunction of main parts Purpose of PAM adoption Outline of simple partial switching methodIntelligent power module MUZ-A24 MUY-A24 Inverter main power supply circuitPower transistor module PFC Power Factor ControllerPower factor improvement Control Method of Rotation Times Sine wave controlCool Heatmuz DRY Operational Frequency Control of Outdoor UnitLEV is fixed to standard opening degree according to opera Cool · DRY ModeHeat Mode MUZ Expansion Valve Control LEV ControlLEV Time chartMUZ-A09/12/15/17/24 MUY-A15/17/24 Degree130/100 190/130 240/170 260/210 260/230 MXZ Microprocessor Control Power factor improvement Cool 5 pulse full closed Temperature is included in standard opening. w1With discharge temperature was added to basic opening. w1 Opening before stop 500 pulse in 15 minutesMXZ-3A HeatMXZ-2A Cool HeatMXZ-3A MXZ-2ACool DRY Heat Superheat LEV opening Discharge temperature ˚F Correction pulseMore than Target discharge temperature+18 More than Target discharge temperature+21.6Operational Frequency Range 40Hz Discharge Temperature Protection ControlHeat Defrosting Control Outdoor FAN Control
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MUY-ANA, MSY-ANA, MS-AWA, MUZ-ANA, MXZ-ANA specifications

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