Mitsubishi Electronics MU-AWA, MS-AWA, MUZ-ANA - U manual MXZ-2A20NA/3A30NA, Cool Heat, MXZ-3A30NA

Page 24

MXZ-2A20NA/3A30NA

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

 

 

Circulation Amount

 

 

Discharge

 

 

High Pressure

Evaporation

 

 

Capacity Distribution

Temperature

 

Temperature

 

 

Control

 

 

Protection

 

 

Protection

Protection

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COOL

Exclusive LEV

 

 

 

 

Receiver LEV

×

 

×

 

 

 

 

 

 

 

 

 

 

HEAT

Exclusive LEV

×

 

 

 

 

Receiver LEV

 

×

 

 

 

 

 

 

 

 

 

 

 

 

 

Indoor heat

Exclusive

 

Outdoor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

exchanger

LEV

 

heat

 

 

 

 

 

 

 

 

 

 

 

 

 

 

exchanger

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Receiver

Receiver

LEV

(MXZ-3A30NA)

In COOL mode, the two indoor coil thermistors (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-2A20NA>

 

 

 

 

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-3A30NA>

 

 

 

 

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

24

Image 24
Contents Contents Revised EDITION-BRevision a MS-A09WA MU-A09WA MS-A12WA MU-A12WA MXZ-2A20NA MXZ-3A30NA MXZ-4A36NAMS-AWA MU-AWA Cool OperationWhen the room temperature is under 73 F Operation time chart ExampleAuto Vane Operation Horizontal vaneLow outside temperature operation MSZ-ANA MSY-ANA MSZ-FDNA MSY-DNA MSZ-DNAMUZ-ANA MUY-ANA MUZ-FDNA MUY-DNA MUZ-DNA MSZ-A MSY-A MSZ-FD MSZ-D MSY-DHeat Operation MSZ MSZ-A24 Gradation of fan speed in initialOverload starting DefrostingAuto Change Over ··· Auto Mode Operation MSZ Mode selectionOutdoor FAN Motor Control MUZ-A MUY-AMUZ-FD MUZ-D MUY-D Inverter System Control MUZ-FDFunction of main parts MUZ-A24 MUY-A24 MUZ-D MUY-D Outline of simple partial switching method At normal operationPurpose of PAM adoption Input current waveform without PAMIntelligent power module Elimination of electrical noiseCompressor Sine wave control Control Method of Rotation TimesOperational Frequency Control of Outdoor Unit MUZ-FD09MUZ-FD12 Cool · DRY Mode Heat ModeExpansion Valve Control LEV Control Pulse MUZ-A09/12/15/17 MUY-A15/17MUZ-A09/12 MUZ-A15/17MUY-A15/17 MUZ-A24260 Inverter main power supply circuit MXZ-ANAProtects transistors from over current Opening before stop → 500 pulse in 15 minutes MXZ-2A20NA/3A30NA MXZ-2A20NACool Heat MXZ-3A30NAMXZ-2A20NA MXZ-3A30NAMXZ-2A20NA Exclusive LEV Receiver LEVMXZ-3A30NA Exclusive LEV MXZ-4A36NACool DRY Heat MXZ-2A20NA MXZ-3A30NAMXZ-2A MXZ-3A MXZ-4AOperational Frequency Range ∆RTDischarge Temperature Protection Control Heat Defrosting ControlOutdoor FAN Control MXZ-4APRE-HEAT Control MXZ-2A20NA- 1 MXZ-3A30NA MXZ-4A36NA DRY Operation Heat OperationHigh pressure protection Made in Japan
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