Mitsubishi Electric MSZ-A09RV-WH, MSZ-A12RV-WH, MUZ-A12RV-E1, MUZ-A09RV-E1, MSZ-A12RV-E1 Service Manual

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Page 1

SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Wireless type Models

No. OB230

CONTENTS

1. TECHINICAL CHANGES ··································2

2. PART NAMES AND FUNCTIONS······················4

3. SPECIFICATION·················································6

4. NOISE CRITERIA CURVES·······························8

5. OUTLINES AND DIMENSIONS·························9

6. WIRING DIAGRAM ··········································10

7. REFRIGERANT SYSTEM DIAGRAM··············12

8. PERFORMANCE CURVES······························13

9. MICROPROCESSOR CONTROL ····················23

10. SERVICE FUNCTIONS·····································38

11. TROUBLESHOOTING······································40

12. DISASSEMBLY INSTRUCTIONS·····················57

13. PARTS LIST······················································61

14. OPTIONAL PARTS···········································65

MSZ-A09RV -

(WH)●

MUZ-A09RV -

MSZ-A12RV -

(WH)●

MUZ-A12RV -

E1E1

1999

Page 2

1 TECHNICAL CHANGES

INFORMATION FOR THE AIR CONDITIONER WITH R-410A REFRIGERANT

• This room air conditioner adopts R-410A of HFC refrigerant which never destroys the ozone layer. Pay attention following points.

1 As R-410A working pressure is 1.6 times higher than that of R-22 of previous refrigerant, dedicated tools and piping are

required.

2 R-410A is more affected by water and contaminations than R-22. Keep R-410Aaway from water and contaminations during

storage and while installing.

3 Use clean dedicated piping materiales for R-410A only which are strong enough against R-410Apressure. Never use any

current pipes designed for R-22.

4 Composition change may occur in R-410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent

composition change.

Lubricant

Refrigerant

New refrigerant

R-410A

HFC-32: HFC-125 (50%:50%)

Pseudo-azeotropic refrigerant

Not included

A1/A1

72.6

-51.4

1.557 64

Non combustible

1730

From liquid phase in cylinder

Possible

Incompatible oil

Non Non

Previous refrigerant

R-22

R-22 (100%)

Single refrigerant

Included

86.5

-40.8

0.94

44.4

Non combustible

0.055 1700

Gas phase

Possible

Compatible oil

Light yellow

Non

Refrigerant Composition (Ratio) Refrigerant handling Chlorine Safety group (ASHRAE) Molecular weight Boiling point (:) Steam pressure [25:](Mpa) Saturated steam density [25:](Kg/K) Combustibility ODP w1 GWP w2 Refrigerant charge method Additional charge on leakage Kind Color Smell

New Specification Current Specification

w1:Ozone Destruction Parameter : based on CFC-11 w2 :Global Warmth Parameter : based on CO

The incompatible lubricant easily separates from refrigerant and is in the upper layer inside the suction muffler. Raising position of the oil back hole enables to back the lubricant of the upper layer to the compressor.

Since refrigerant and lubricant are compatible each, lubricant backs to the compressor through the lower position oil back hole.

Compressor

Suction muffler

Oil back hole

Lubricant

Refrigerant

Compressor

Suction muffler

Oil back hole

Lubricant /Refrigerant

Compressor

NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).

The conversion factor is: 1(MPa • G) =10.2(kgf/ff• G)

Page 3

-30 -20 -10 0 10 20

40 50 60

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

(MPa.G)

R-410A R-22

Conversion chart of refrigerant temperature and pressure

Saturated liquid pressure

(;)

NOTE : The unit of pressure has been changed to MPa on the

international system of units(SI unit system).

The conversion factor is: 1(MPa • G) =10.2(kgf/ff• G)

1.Tools dedicated for the air conditioner with R-410A refrigerant

The following tools are required for R-410A refrigerant. Some R-22 tools can be substituted for R-410Atools. The diameter of the service port on the outdoor unit operation valve has been changed to prevent improper refrigerant charging. Cap size has also been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.

2.Refrigerant piping

1 Specifications

Use the refrigerant pipes that meet the following specifications.

• Use a copper pipe or a coppor-alloy seamless pipe with a thickness of 0.7 mm or less, as the pressure resistance is in sufficient.

2 Flaring work and flare nut

Flaring work for R-410A pipes differs from that for the existing refrigerant pipes. for details of flaring work, refer to Installation manual “6-1 FLARING WORK”.

R-410A tools

Can R-22 tools be used?

Gas leak detector

R-410A pressures beyonds the measurement range of R-22 gauges. Port diameters have been changed to prevent other kinds of refrigerant from being charged into the units.

Hose material and cap size have been changed to improve the pressure resistance.

Dedicated for HFC refrigerant. 1/4 and 3/8 wrenches can be used for both R-22 and R-410A units.

Description

Clamp bar hole has been enlarged to reinforce the spring strength in the tool. Provided for flaring work (to be used with R-22 flare tool).

Provided to prevent the back flow of oil. This adapter enables you to use vacuum pumps. It is difficult to measure R-410A with a charging cylinder because the refrigerant bubbles due to high pressure and high-speed vaporization

Yes Yes

Newly required

Gauge manifold

Charge hose

Torque wrench Flare tool Flare gauge

Vacuum pump adapter

Electronic scale for refrigerant charging

No : Not Substitutable for R-410A Yes : Substitutable for R-410A

Wall thickness

Outside diameter

Pipe

mm inch For liquid For gas

6.35

9.52

1/4 3/8

0.8 mm

Heat resisting foam plastic Specific gravity 0.045 Thickness 8 mm

Insulation material

Page 4

PART NAMES AND FUNCTIONS

INDOOR UNIT

MSZ-A09RVMSZ-A12RV-

Emergency operation switch

Display section

Operation Indicator

Receiving section

Grille

Air cleaning filter(white bellows type)

Deodorizing filter (gray sponge type)

Air filter

Vertical vanes

Air inlet

to Breaker

Remote control receiving section

Horizontal vane

Remote controller

Operation section

(When the grille is open)

Power supply cord

Front panel

Electronic scale for refrigerant charging

Outdoor unit

Gas cylinder

Valve

Refrigerant gas cylinder for R-410A with siphon

Liquid

2 Optional extension pipe for R-410A

3.Refrigerant oil

Apply the special refrigeration oil (accessories) to the flare and the union seat surfaces.

4.Air purge

Use the vacuum pump for air purging for the purpose of environmental protection.

5.Additional charge

For additional charging, charge the refrigerant from liquid phase of the gas cylinder. If the refrigerant is charged from the gas phase, composition chang may occur in the refrigerant inside the cylinder and the outdoor unit. However, charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.

3m 5m

7m 10m 12m

([6.35/[9.52) ([6.35/[9.52) ([6.35/[9.52) ([6.35/[9.52) ([6.35/[9.52)

MAC-A00PI MAC-A01PI MAC-A02PI MAC-A03PI MAC-A04PI

Page 5

REMOTE CONTROLLER

Signal transmitting section

Operation display section

OPERATE /STOP

(ON /OFF)button

OPERATION SELECT button

FAN SPEED CONTROL button

ON-TIMER button

CLOCK SET button

HR. button

MIN. button

(TIME SET button)

TEMPERATURE buttons

VANE CONTROL button

OFF-TIMER button

RESET button

ON/OFF TOO

WARM

TOO

COOL

HR. MIN.

CLOCK

RESET

CLOCK

MODE

FAN

VANE

START

STOP

ECONO COOL button

ECONO COOL

I FEEL

COOL DRY HEAT

6 00

1 1 00

SWING

SWING button

MUZ-A09RVMUZ-A12RV-

OUTDOOR UNIT

Air inlet

Air outlet

Drain outlet

Piping

Drain hose

MSZ-A09RVMSZ-A12RV-

Page 6

SPECIFICATION

Indoor model

Function

Power supply

Capacity Air flow(Hi) Dehumidification Power outlet Running current Power input Auxiliary heater Power factor Starting current Fan motor current Model Winding resistance(at20:) Dimensions WOHOD Weight Air direction Sound level (Hi) Fan speed (Hi) Fan speed regulator RT11(at25:) Thermistor RT12(at25:) RT13(at25:) Outdoor model Outdoor air flow Compressor motor current Fan motor current

Model Output Winding resistance(at20:) Model Winding resistance(at20:) Dimensions WOHOD Weight Sound level Fan speed Fan speed regulator Refrigerant filling capacity(R-410A) Refrigerating oil (Model)

RT61(at100:)

Thermistor RT62(at0:) RT64(at50:)



K /h

R/h

A A

A(kW)

A A



rpm

k" k" k"

K /h

A A

  



rpm

cc k" k" k"



MSZ-A09RV -

Single phase

220-240V,50Hz

—

4.55 - 4.17

0.17

RA4V19-BA

WHT-BLK 292.4

BLK-RED 324.6

850O278O191

3 10 10 10

MUZ-A09RV -

0.27-0.25

SNB-092FBA

700

U-V 0.93 U-W 0.93

V-W 0.93

RA6V28-CA

WHT-BLK 197

BLK-RED 315 YLW-BLK 13

710(+69)o540o255

1.10

450 (NEO22)

13.4

32.6 17

Cooling

2.6 (0.9-3.3) 516

1.2

3.67-3.37

800 (250-1180)

920

1440

6.9

3.25

670

Heating

3.6 (0.9-4.8) 540

—

4.55-4.17

990 (250-1650)

950

1530

7.4

3.64

700

MSZ-A12RV -

Single phase

220-240V,50Hz

— 99

7.25 - 6.65

0.19

RA4V19-BA WHT-BLK 292.4 BLK-RED 324.6

850O278O191

3 10 10 10

MUZ-A12RV -

0.27-0.25

SNB-092FBA

900

U-V 0.93 U-W 0.93

V-W 0.93

RA6V28-CA

WHT-BLK 197

BLK-RED 315 YLW-BLK 13

710(+69)o540o255

1.10

450 (NEO22)

13.4

32.6 17

Cooling

3.4 (0.9-3.8) 588

1.6

5.60 - 5.13

1220 (250 - 1580)

1020

1440

7.4

2.79

670

Heating

`4.8 (0.9-6.1)

642

—

7.25 - 6.65

1580 (250 - 2050)

1100

1530

8.1

3.04

700

Electrical

data

Fan

motor

Special

remarks

Compressor

Electrical data

Fan

motor

Special

remarks

Coefficient of performance(C.O.P)

Capacity

NOTE : Test conditions.

Cooling : Indoor DB27: WB19:

Outdoor DB35: WB24:

Heating : Indoor DB 20: WB -:

Ondoor DB 7: WB 6:

Page 7

1.5+ 440V

MP24GA 12V 300"

ERZV10D471

S201DH1Y

JM1aN-ZTMP-DC12V

93.5:5A 250V 136:i3: 2A

250V 3.15A

500+ 450V

1.8+ 440V RR-18

250V 2A

13A 1.0mH

EM43240 50m" 5W

100" 20W

PS21101-AL / PS21204-A

G4U-1-E G4U-1-E

LB6 250V AC

PMA10001

G4A-1A-P-PS

INDOOR UNIT

OUTDOOR UNIT

Item

Model

Item

Indoor fan capacitor Vane motor Varistor (NR11) Semiconductor relay Terminal block Relay (compressor) (52C) Terminal block thermal Fuse Indoor fan motor thermal fuse Fuse (F11)

Smoothing capacitor (C61,C62) Outdoor fan capacitor (C65) Current transformer (CT61) Fuse (F801, F901) Reactor (L64) Noise filter Current detecting resistor (R61, 62, 64) Current limiting resistor (R65) Terminal block Intelligent power module Relay (X61) Relay (X62) Reversing valve coil Power factor controll module Rush current limiting relay

MSZ-A09RV MSZ-A12RV

MUZ-A09RV MUZ-A12RV

Specifications and rating conditions of main electric parts

Page 8

63 125 250 500 1000 2000 4000 8000

APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions.

Cooling : DB27: WB19: Heating : DB20: WB -:

MSZ-A09RV- E1

HEATING

NOTCH

COOLING 36

SPL(dB(A)) LINE

63 125 250 500 1000 2000 4000 8000

APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions.

Cooling :DB35

:

WB24

Heating :DB 7

WB 6

MUZ-A09RV- E1

HEATING

NOTCH

COOLING 45

SPL(dB(A)) LINE

63 125 250 500 1000 2000 4000 8000

APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions.

Cooling : DB27

:

WB19

:

Heating : DB20

:

WB -

:

MSZ-A12RV- E1

HEATING COOLING

NOTCH

SPL(dB(A)) LINE

63 125 250 500 1000 2000 4000 8000

APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions.

Cooling :DB35

:

WB24

:

Heating :DB 7

WB 6

MUZ-A12RV- E1

HEATING

NOTCH

COOLING 46

SPL(dB(A)) LINE

NOISE CRITERIA CURVES

Page 9

116.581.5

818

278

850

16562956

or more

100

2.5

271 4.5

231.5

169

326 326

189

160

17.5

Air in

Air out

Insulation [28

Drain hose [16 (Connected part O.D)

Installation plate

Wall hole [65

Indoor unit

Installation plate

Power supply cord Lead to right 1.0m Lead to left 0.3m

Wireless remote controller

Liquid line [6.35-0.5m Gas line [9.52-0.43m Insulation [37 O.D

[21 I.D

{

OUTLINES AND DIMENSIONS5

Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.35

Service panel

Gas refrigerant pipe joint Refrigerant pipe (flared) [9.52

Service port

Bolt pitch for installation

Handle

Air out

Air in

Drainage holes [28

4 holes 10o21

500 710

265

105

138

If both sides or back side is vacant. only to be free 50 cm in front of a unit

Air in

265

REQUIRED SPACE

If a front side or both sides is vacant. an upper side of a unit has only to be vacant 10cm.

Drainage holes [28

127

32.4

367

Drainage holes [28

32.5

255

285

320

155

43-

35-

540

270

35cm or more

50cm or more

10cm or more

10cm

or m

ore

MSZ-A09RVMSZ-A12RV-

MUZ-A09RVMUZ-A12RV-

INDOOR UNIT

OUTDOOR UNIT

Page 10

6 WIRING DIAGRAM

INDOOR UNIT

MSZ-A09RV- MSZ-A12RV- MODELS WIRING DIAGRAM

E1E1

POWER SUPPLY CORD ~/N 220-240V 50Hz

GRN/YLW

BLK GRY YLW BRN WHT RED

1 2 3 4 5 6

SR141

121

C11

HIC1

TRANS

MV2

RT13

4 3 2

CN112

151

MV1

RT12

RT11

111

CN211

NR11

ELECTRONIC CONTROL P.C. BOARD

F11

220-240V~

BRN

BLU

BRN

WHT

BLU

F12

RED

BLU

1 2

BLU

CN201

52C

CIRCUIT BREAKER

12V

TO OUTDOOR UNIT CONNECTING

GREEN SIGN MONITOR P.C.BOARD

1J1

REMOTE CONTROLLER

POWER MONITOR, RECEIVER P.C.BOARD

LD101T

SYMBOL C11 F11 F12 HIC1 MF MV1 MV2

SYMBOL NR11

RT11

RT12

RT13

SYMBOL SR141 TB 52C

NAME INDOOR FAN CAPACITOR FUSE (3.15A) THERMAL FUSE (93:) DC/DC CONVERTER INDOOR FAN MOTOR VANE MOTOR (HORIZONTAL) VANE MOTOR (VERTICAL)

NAME VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR (MAIN) INDOOR COIL THERMISTOR (SUB)

NAME SOLID STATE RELAY TERMINAL BLOCK CONTACTOR

GRN/YLW

NOTE:1. About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.

2. Use copper conductors only. (For field wiring)

3. Symbols below indicate. /: Terminal block, : Connector

Page 11

OUTDOOR UNIT

MUZ-A09RV- MUZ-A12RV- MODELS WIRING DIAGRAM

E1E1

C65

BLK

CN771

F901

911

YLW

X61

RED

WHT

ORG

X62

654321

MF61

CN914

BOARD

RELAY

CN912

CN779CN778

CN913

TRANS

CN601

BLU

WHT

TAB62

SSR61

L61

DSA61

NR61

LD-E

L63

TAB68

TAB69

LD62 LD61

LD67

LD66

LD65

TAB76

TAB75

PFC

R61

R62

C61

C62

R64

CN724

LEV

CN726

L64

LDNF1

LDNF2

TAB72

TAB71

TAB61

231

21S4

ELECTRONIC CONTROL P.C BOARD

CN641

1 2

CN642

6 5 4 3 2 1

IPM

GRN

GRY

BLK

F801

IC950

RT64

RT62

RT61

BLK

WHT

RED

BLK

WHT

RED

P.C

NOISE FILTER P.C BOARD

1 2

TB2

WHT

BLU

R65

X64

CT61

GRN/YLW

BLU

12V

3 2 N

TB1

220-240V ~

FROM INDOOR UNIT CONNECTING

SYMBOL CT61 C61,C62 C65 DSA61 F801 F901 IC950 IPM LEV L61

SYMBOL L63 L64 MC MF61 NR61 PFC RT61 RT62 RT64 R61,62

SYMBOL R64 R65 SSR61 TB1, TB2 X61, X62 X64

21S4

NAME CURRENT TRANSFORMER SMOOTHING CAPACITOR OUTDOOR FAN CAPACITOR SURGE ABSORBER FUSE (2A) FUSE (2A) DC/DC CONVERTER

INTELLIGENT POWER MODULE

EXPANSION VALVE COIL CMC COIL

NAME COIL REACTOR COMPRESSOR OUTDOOR FAN MOTOR (INNER FUSE) VARISTOR POWER FACTOR CONTROL MODULE DISCHARGE TEMPERATURE THERMIST OR DEFROST THERMISTOR FIN TEMPERATURE THERMIST OR CURRENT-DETECTING RESISTOR

NAME CURRENT-DETECTING RESISTOR CURRENT-LIMITING RESISTOR SOLID STATE RELAY TERMINAL BLOCK RELAY RELAY REVERSING VALVE COIL (COOLING TURN ON)

BLU

RED

WHT

+ +

NOTE:1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate. /: Terminal block, : Connector

Page 12

MUZ-A09RV MUZ-A12RV -

OUTDOOR UNIT

REFRIGERANT SYSTEM DIAGRAM

MSZ-A09RV MSZ-A12RV -

INDOOR UNIT

Unit : mm

MAX. REFRIGERANT PIPING LENGTH

Model

MSZ-A09RVMSZ-A12RV-

Additional piping

Max. length :mm

Piping size O.D : mm

Gas Liquid Indoor unit Outdoor unit

9.52 6.35 0.43 0

Length of connecting pipe : m

Refrigerant Piping Max. length A

Height difference should be within 5m regardless of which unit, indoor or outdoor position is high.

w Max. Height

difference 8m

Indoor unit

Outdoor unit

MAX. HEIGHT DIFFERENCE

ADDITIONAL REFRIGERANT CHARGE (R-410A:g)

Model

MSZ-A09RVMSZ-A12RV-

Outdoor unit precharged

1100

Refrigerant piping length (one way)

9m8m

Calculation : Xg=30g /m✕ (A-7)m

Indoor heat exchanger

Outdoor heat exchanger

Distributor

Flared connection

Room temperature thermistor RT11

Indoor coil thermistor RT13(sub)

Defrost thermistor RT62

Discharge thermistor RT61

Flared connection

Stop valve

Stop valve (with service port)

Capillary tube

Capillary tube (2 pcs)

Refrigerant flow in cooling

Compressor

Accumulator

Maffler

Muffler

Reversing valve

Refrigerant flow in heating

Refrigerant pipe [9.52 (Option)

Refrigerant pipe [6.35 (Option)

Indoor coil thermistor RT12(main)

Expansion valve

[3.0o[2.0o200

[3.0o[2.0o300

For additional charging, charge the refrigerant from liquid phase of the gas cylinder. If the refrigerant inside the cylinder and the outdoor unit. However, charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.

11m10m

12090

12m

150

Page 13

PERFORMANCE CURVES8

The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions.

Since operating conditions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.

(1) GUARANTEED VOLTAGE

Rated voltage : ±10% (198 ~ 242V ),50Hz

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature ::WB (2) Indoor discharge air wet-bulb temperature ::WB (3) Outdoor intake air dry-bulb temperature ::DB (4) Total input :W (5) Indoor intake air dry-bulb temperature ::DB (6) Outdoor intake air wet-bulb temperature ::WB (7) Total input :W

Indoor air wet-bulb temperature difference on the left side of the chart on next page shows the difference between the indoor intake air wet-bulb temperature and the indoor discharge air wet-bulb temperature for your reference at service.

How to measure the indoor air wet-bulb temperature difference

1. Attach at least 2 sets of wet-and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets of wet-and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high.

2. Attach at least 2 sets of dry-bulb thermometers to the outdoor air intake. Cover the thermometers to prevent direct rays of the sun.

3. Check that the air filter is cleaned.

4. Open windows and doors of room.

5. Press the EMERGENCY OPERATION switch once (twice) to start the EMERGENCY COOL (HEAT) MODE.

6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.

7. 10 minutes later, measure temperature again and check that the temperature does not change.

INDOOR UNIT

OUTDOOR UNIT

}

Cooling

}

Heating

Page 14

7.4

6.9

6.3

5.8

5.3

4.8

MSZ-A09RV- E1

8.5

7.9

7.3

6.7

6.1

5.5

MSZ-A12RV- E1

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

Correction of Cooling capacity

Capacity correction factors

The operational frequency of compressor

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

Correction of Cooling capacity

Capacity correction factors

The operational frequency of compressor

Cooling capacity

MUZ-A09RV -

MUZ-A12RV -

Correction of total input

Capacity correction factors

The operational frequency of compressor

0 50 100 150(Hz)

0.5

1.0

1.5

2.0

Correction of total input

Capacity correction factors

The operational frequency of compressor

0 50 100 150(Hz)

0.5

1.0

1.5

2.0

MUZ-A09RV -

MUZ-A12RV -

Page 15

27.1

25.1

23.0

20.9

18.8

16.7

14.6

12.5

30.4

28.1

25.8

23.4

21.1

18.7

16.4

14.1

MSZ-A12RV- E1

MSZ-A09RV- E1

NOTE:The above curves are for the heating operation without any frost.

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

Correction of Heating capacity

Capacity correction factors

The operational frequency of compressor

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

Correction of Heating capacity

Capacity correction factors

The operational frequency of compressor

Heating capacity

Correction of total input

Capacity correction factors

The operational frequency of compressor

0 50 100 150(Hz)

0.5

1.0

1.5

Correction of total input

Capacity correction factors

The operational frequency of compressor

0 50 100 150(Hz)

0.5

1.0

1.5

MUZ-A09RV -

MUZ-A12RV -

MUZ-A09RV -

MUZ-A12RV -

Page 16

OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

1 Both indoor and outdoor unit are under the same temperature/humidity condition.

NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).

The conversion factor is: 1(MPa • G) =10.2(kgf/ff• G)

Dry-bulb temperature

Relative humidity(%)

(MPa • G)

(kgf/F • G)

(reference)



18 32

62Hz



15 20

25 60

30 70(%)

35(:)

0.6

0.7

0.8

0.9

1.0

1.1

62Hz

1.2

MUZ-A12RV -

Outdoor low pressure

Ambient temperature(:) Ambient humidity(%)

220V

240V

15 20

25 60

70(%)

35(:)

83Hz

MUZ-A12RV -

Outdoor unit current (A)

Ambient temperature(:) Ambient humidity(%)

2 Air flow should be set at Hi. 3 Operational frequency : 83Hz

How to operate with fixed operational frequency of the compressor.

1. Press the EMERGENCY OPERATION switch on the front of the indoor unit , and select either the COOLmode or the HEAT mode before starting to operate the air conditioner.

2. The compressor starts up. The operational frequency of the compressor is 83Hz in the COOL mode and 58Hz in the HEAT mode.

3. The fan speed of the indoor unit is Hi.

4. This operation continues for 30minutes.

5. In order to release this operation, press the EMERGENCY OPERATION switch again, press any button on the remote

controller.

COOL operation

MUZ-A09RV -

(MPa • G)

(kgf/F • G)

(reference)



18 32

62Hz



15 20

25 60

30 70(%)

35(:)

0.7

0.8

0.9

1.0

1.1

1.2

1.3

62Hz

Outdoor low pressure

Ambient temperature(:) Ambient humidity(%)

15 20

25 6030 70(%)

35(:)

220V

240V

53Hz

Outdoor unit current (A)

Ambient temperature(:) Ambient humidity(%)

Page 17

6.0

5.5

5.0

4.5

4.0

3.5

3.0 2

5 10152025

240V

220V

58Hz

MUZ-A12RV -

Outdoor unit current (A)

Ambient temperature(:)

HEAT operation

Condition Indoor : Dry bulb temperature 20.0:

Wet bulb temperature 14.5:

Outdoor : Dry bulb temperature 2 7 15 20.0:

Wet bulb temperature 1 6 12 14.5:

58Hz

220V

240V

6.0

5.5

5.0

4.5

4.0

3.5

3.0 2

510152025

MUZ-A09RV -

Outdoor unit current (A)

Ambient temperature(:)

Page 18

PERFORMANCE DATA COOL operation

MUZ-A09RV -

3.06 1.71 0.56 640 2.93 1.64 0.56 672 2.81 1.57 0.56 704 2.70 1.51 0.56 736

3.19 1.40 0.44 672 3.06 1.34 0.44 712 2.96 1.30 0.44 728 2.86 1.26 0.44 760

3.06 1.83 0.60 640 2.93 1.76 0.60 672 2.81 1.68 0.60 704 2.70 1.62 0.60 736

3.19 1.53 0.48 672 3.06 1.47 0.48 712 2.96 1.42 0.48 728 2.86 1.37 0.48 760

3.32 1.19 0.36 696 3.20 1.15 0.36 740 3.12 1.12 0.36 760 2.99 1.08 0.36 792

3.06 1.96 0.64 640 2.93 1.87 0.64 672 2.81 1.80 0.64 704 2.70 1.73 0.64 736

3.19 1.66 0.52 672 3.06 1.59 0.52 712 2.96 1.54 0.52 728 2.86 1.49 0.52 760

3.32 1.33 0.40 696 3.20 1.28 0.40 740 3.12 1.25 0.40 760 2.99 1.20 0.40 792

3.06 2.08 0.68 640 2.93 1.99 0.68 672 2.81 1.91 0.68 704 2.70 1.84 0.68 736

3.19 1.78 0.56 672 3.06 1.71 0.56 712 2.96 1.66 0.56 728 2.86 1.60 0.56 760

3.32 1.46 0.44 696 3.20 1.41 0.44 740 3.12 1.37 0.44 760 2.99 1.32 0.44 792

3.48 1.11 0.32 728 3.35 1.07 0.32 768 3.28 1.05 0.32 792 3.17 1.02 0.32 832

3.06 2.20 0.72 640 2.93 2.11 0.72 672 2.81 2.02 0.72 704 2.70 1.95 0.72 736

3.19 1.91 0.60 672 3.06 1.83 0.60 712 2.96 1.78 0.60 728 2.86 1.72 0.60 760

3.32 1.59 0.48 696 3.20 1.54 0.48 740 3.12 1.50 0.48 760 2.99 1.44 0.48 792

3.48 1.25 0.36 728 3.35 1.21 0.36 768 3.28 1.18 0.36 792 3.17 1.14 0.36 832

3.06 2.32 0.76 640 2.93 2.22 0.76 672 2.81 2.13 0.76 704 2.70 2.06 0.76 736

3.19 2.04 0.64 672 3.06 1.96 0.64 712 2.96 1.90 0.64 728 2.86 1.83 0.64 760

3.32 1.72 0.52 696 3.20 1.66 0.52 740 3.12 1.62 0.52 760 2.99 1.55 0.52 792

3.48 1.39 0.40 728 3.35 1.34 0.40 768 3.28 1.31 0.40 792 3.17 1.27 0.40 832

3.59 1.00 0.28 768 3.48 0.98 0.28 808 3.43 0.96 0.28 832 3.33 0.93 0.28 856

3.06 2.44 0.80 640 2.93 2.34 0.80 672 2.81 2.25 0.80 704 2.70 2.16 0.80 736

3.19 2.17 0.68 672 3.06 2.08 0.68 712 2.96 2.02 0.68 728 2.86 1.94 0.68 760

3.32 1.86 0.56 696 3.20 1.79 0.56 740 3.12 1.75 0.56 760 2.99 1.67 0.56 792

3.48 1.53 0.44 728 3.35 1.48 0.44 768 3.28 1.44 0.44 792 3.17 1.40 0.44 832

3.59 1.15 0.32 768 3.48 1.11 0.32 808 3.43 1.10 0.32 832 3.33 1.06 0.32 856

3.06 2.57 0.84 640 2.93 2.46 0.84 672 2.81 2.36 0.84 704 2.70 2.27 0.84 736

3.19 2.29 0.72 672 3.06 2.20 0.72 712 2.96 2.13 0.72 728 2.86 2.06 0.72 760

3.32 1.99 0.60 696 3.20 1.92 0.60 740 3.12 1.87 0.60 760 2.99 1.79 0.60 792

3.48 1.67 0.48 728 3.35 1.61 0.48 768 3.28 1.57 0.48 792 3.17 1.52 0.48 832

3.59 1.29 0.36 768 3.48 1.25 0.36 808 3.43 1.24 0.36 832 3.33 1.20 0.36 856

3.06 2.69 0.88 640 2.93 2.57 0.88 672 2.81 2.47 0.88 704 2.70 2.38 0.88 736

3.19 2.42 0.76 672 3.06 2.32 0.76 712 2.96 2.25 0.76 728 2.86 2.17 0.76 760

3.32 2.12 0.64 696 3.20 2.05 0.64 740 3.12 2.00 0.64 760 2.99 1.91 0.64 792

3.48 1.81 0.52 728 3.35 1.74 0.52 768 3.28 1.70 0.52 792 3.17 1.65 0.52 832

3.59 1.44 0.40 768 3.48 1.39 0.40 808 3.43 1.37 0.40 832 3.33 1.33 0.40 856

3.06 2.81 0.92 640 2.93 2.69 0.92 672 2.81 2.58 0.92 704 2.70 2.49 0.92 736

3.19 2.55 0.80 672 3.06 2.44 0.80 712 2.96 2.37 0.80 728 2.86 2.29 0.80 760

3.32 2.25 0.68 696 3.20 2.17 0.68 740 3.12 2.12 0.68 760 2.99 2.03 0.68 792

3.48 1.95 0.56 728 3.35 1.88 0.56 768 3.28 1.83 0.56 792 3.17 1.78 0.56 832

3.59 1.58 0.44 768 3.48 1.53 0.44 808 3.43 1.51 0.44 832 3.33 1.46 0.44 856

3.06 2.93 0.96 640 2.93 2.81 0.96 672 2.81 2.70 0.96 704 2.70 2.60 0.96 736

3.19 2.68 0.84 672 3.06 2.57 0.84 712 2.96 2.49 0.84 728 2.86 2.40 0.84 760

3.32 2.39 0.72 696 3.20 2.30 0.72 740 3.12 2.25 0.72 760 2.99 2.15 0.72 792

3.48 2.09 0.60 728 3.35 2.01 0.60 768 3.28 1.97 0.60 792 3.17 1.90 0.60 832

3.59 1.72 0.48 768 3.48 1.67 0.48 808 3.43 1.65 0.48 832 3.33 1.60 0.48 856

3.06 3.06 1.00 640 2.93 2.93 1.00 672 2.81 2.81 1.00 704 2.70 2.70 1.00 736

3.19 2.80 0.88 672 3.06 2.69 0.88 712 2.96 2.61 0.88 728 2.86 2.52 0.88 760

3.32 2.52 0.76 696 3.20 2.43 0.76 740 3.12 2.37 0.76 760 2.99 2.27 0.76 792

3.48 2.23 0.64 728 3.35 2.15 0.64 768 3.28 2.10 0.64 792 3.17 2.03 0.64 832

3.59 1.87 0.52 768 3.48 1.81 0.52 808 3.43 1.78 0.52 832 3.33 1.73 0.52 856

OUTDOOR DB(:)

INDOOR INDOOR

21 25 27 30

DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

CAPACITY : 2.6 kW INPUT : 800 W SHF : 0.74

Page 19

OUTDOOR DB(:)

INDOOR INDOOR

35 40 43

DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

21 18 2.55 1.43 0.56 784 2.34 1.31 0.56 832 2.25 1.26 0.56 848 21 20 2.68 1.18 0.44 816 2.50 1.10 0.44 856 2.41 1.06 0.44 880 22 18 2.55 1.53 0.60 784 2.34 1.40 0.60 832 2.25 1.35 0.60 848 22 20 2.68 1.29 0.48 816 2.50 1.20 0.48 856 2.41 1.15 0.48 880 22 22 2.83 1.02 0.36 848 2.65 0.95 0.36 896 2.56 0.92 0.36 912 23 18 2.55 1.63 0.64 784 2.34 1.50 0.64 832 2.25 1.44 0.64 848 23 20 2.68 1.39 0.52 816 2.50 1.30 0.52 856 2.41 1.25 0.52 880 23 22 2.83 1.13 0.40 848 2.65 1.06 0.40 896 2.56 1.02 0.40 912 24 18 2.55 1.73 0.68 784 2.34 1.59 0.68 832 2.25 1.53 0.68 848 24 20 2.68 1.50 0.56 816 2.50 1.40 0.56 856 2.41 1.35 0.56 880 24 22 2.83 1.25 0.44 848 2.65 1.17 0.44 896 2.56 1.13 0.44 912 24 24 2.99 0.96 0.32 880 2.81 0.90 0.32 920 2.73 0.87 0.32 940 25 18 2.55 1.83 0.72 784 2.34 1.68 0.72 832 2.25 1.62 0.72 848 25 20 2.68 1.61 0.60 816 2.50 1.50 0.60 856 2.41 1.44 0.60 880 25 22 2.83 1.36 0.48 848 2.65 1.27 0.48 896 2.56 1.23 0.48 912 25 24 2.99 1.08 0.36 880 2.81 1.01 0.36 920 2.73 0.98 0.36 940 26 18 2.55 1.94 0.76 784 2.34 1.78 0.76 832 2.25 1.71 0.76 848 26 20 2.68 1.71 0.64 816 2.50 1.60 0.64 856 2.41 1.54 0.64 880 26 22 2.83 1.47 0.52 848 2.65 1.38 0.52 896 2.56 1.33 0.52 912 26 24 2.99 1.20 0.40 880 2.81 1.12 0.40 920 2.73 1.09 0.40 940 26 26 3.15 0.88 0.28 912 2.96 0.83 0.28 952 2.87 0.80 0.28 972 27 18 2.55 2.04 0.80 784 2.34 1.87 0.80 832 2.25 1.80 0.80 848 27 20 2.68 1.82 0.68 816 2.50 1.70 0.68 856 2.41 1.64 0.68 880 27 22 2.83 1.59 0.56 848 2.65 1.49 0.56 896 2.56 1.43 0.56 912 27 24 2.99 1.32 0.44 880 2.81 1.24 0.44 920 2.73 1.20 0.44 940 27 26 3.15 1.01 0.32 912 2.96 0.95 0.32 952 2.87 0.92 0.32 972 28 18 2.55 2.14 0.84 784 2.34 1.97 0.84 832 2.25 1.89 0.84 848 28 20 2.68 1.93 0.72 816 2.50 1.80 0.72 856 2.41 1.73 0.72 880 28 22 2.83 1.70 0.60 848 2.65 1.59 0.60 896 2.56 1.54 0.60 912 28 24 2.99 1.44 0.48 880 2.81 1.35 0.48 920 2.73 1.31 0.48 940 28 26 3.15 1.13 0.36 912 2.96 1.07 0.36 952 2.87 1.03 0.36 972 29 18 2.55 2.24 0.88 784 2.34 2.06 0.88 832 2.25 1.98 0.88 848 29 20 2.68 2.04 0.76 816 2.50 1.90 0.76 856 2.41 1.83 0.76 880 29 22 2.83 1.81 0.64 848 2.65 1.70 0.64 896 2.56 1.64 0.64 912 29 24 2.99 1.55 0.52 880 2.81 1.46 0.52 920 2.73 1.42 0.52 940 29 26 3.15 1.26 0.40 912 2.96 1.19 0.40 952 2.87 1.15 0.40 972 30 18 2.55 2.34 0.92 784 2.34 2.15 0.92 832 2.25 2.07 0.92 848 30 20 2.68 2.14 0.80 816 2.50 2.00 0.80 856 2.41 1.92 0.80 880 30 22 2.83 1.93 0.68 848 2.65 1.80 0.68 896 2.56 1.74 0.68 912 30 24 2.99 1.67 0.56 880 2.81 1.57 0.56 920 2.73 1.53 0.56 940 30 26 3.15 1.38 0.44 912 2.96 1.30 0.44 952 2.87 1.26 0.44 972 31 18 2.55 2.45 0.96 784 2.34 2.25 0.96 832 2.25 2.16 0.96 848 31 20 2.68 2.25 0.84 816 2.50 2.10 0.84 856 2.41 2.02 0.84 880 31 22 2.83 2.04 0.72 848 2.65 1.91 0.72 896 2.56 1.84 0.72 912 31 24 2.99 1.79 0.60 880 2.81 1.68 0.60 920 2.73 1.64 0.60 940 31 26 3.15 1.51 0.48 912 2.96 1.42 0.48 952 2.87 1.38 0.48 972 32 18 2.55 2.55 1.00 784 2.34 2.34 1.00 832 2.25 2.25 1.00 848 32 20 2.68 2.36 0.88 816 2.50 2.20 0.88 856 2.41 2.12 0.88 880 32 22 2.83 2.15 0.76 848 2.65 2.02 0.76 896 2.56 1.95 0.76 912 32 24 2.99 1.91 0.64 880 2.81 1.80 0.64 920 2.73 1.75 0.64 940 32 26 3.15 1.64 0.52 912 2.96 1.54 0.52 952 2.87 1.49 0.52 972

CAPACITY : 2.6 kW INPUT : 800 W SHF : 0.74

PERFORMANCE DATA COOL operation

MUZ-A09RV -

Page 20

MUZ-A12RV -

OUTDOOR DB(:)

INDOOR INDOOR

21 25 27 30

DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

21 18 4.00 2.04 0.51 976 3.83 1.95 0.51 1025 3.67 1.87 0.51 1074 3.54 1.80 0.51 1122 21 20 4.17 1.62 0.39 1025 4.00 1.56 0.39 1086 3.88 1.51 0.39 1110 3.74 1.46 0.39 1159 22 18 4.00 2.20 0.55 976 3.83 2.10 0.55 1025 3.67 2.02 0.55 1074 3.54 1.94 0.55 1122 22 20 4.17 1.79 0.43 1025 4.00 1.72 0.43 1086 3.88 1.67 0.43 1110 3.74 1.61 0.43 1159 22 22 4.34 1.34 0.31 1061 4.18 1.30 0.31 1129 4.08 1.26 0.31 1159 3.91 1.21 0.31 1208 23 18 4.00 2.36 0.59 976 3.83 2.26 0.59 1025 3.67 2.17 0.59 1074 3.54 2.09 0.59 1122 23 20 4.17 1.96 0.47 1025 4.00 1.88 0.47 1086 3.88 1.82 0.47 1110 3.74 1.76 0.47 1159 23 22 4.34 1.52 0.35 1061 4.18 1.46 0.35 1129 4.08 1.43 0.35 1159 3.91 1.37 0.35 1208 24 18 4.00 2.52 0.63 976 3.83 2.41 0.63 1025 3.67 2.31 0.63 1074 3.54 2.23 0.63 1122 24 20 4.17 2.12 0.51 1025 4.00 2.04 0.51 1086 3.88 1.98 0.51 1110 3.74 1.91 0.51 1159 24 22 4.34 1.69 0.39 1061 4.18 1.63 0.39 1129 4.08 1.59 0.39 1159 3.91 1.52 0.39 1208 24 24 4.56 1.23 0.27 1110 4.39 1.18 0.27 1171 4.28 1.16 0.27 1208 4.15 1.12 0.27 1269 25 18 4.00 2.68 0.67 976 3.83 2.56 0.67 1025 3.67 2.46 0.67 1074 3.54 2.37 0.67 1122 25 20 4.17 2.29 0.55 1025 4.00 2.20 0.55 1086 3.88 2.13 0.55 1110 3.74 2.06 0.55 1159 25 22 4.34 1.86 0.43 1061 4.18 1.80 0.43 1129 4.08 1.75 0.43 1159 3.91 1.68 0.43 1208 25 24 4.56 1.41 0.31 1110 4.39 1.36 0.31 1171 4.28 1.33 0.31 1208 4.15 1.29 0.31 1269 26 18 4.00 2.84 0.71 976 3.83 2.72 0.71 1025 3.67 2.61 0.71 1074 3.54 2.51 0.71 1122 26 20 4.17 2.46 0.59 1025 4.00 2.36 0.59 1086 3.88 2.29 0.59 1110 3.74 2.21 0.59 1159 26 22 4.34 2.04 0.47 1061 4.18 1.97 0.47 1129 4.08 1.92 0.47 1159 3.91 1.84 0.47 1208 26 24 4.56 1.59 0.35 1110 4.39 1.54 0.35 1171 4.28 1.50 0.35 1208 4.15 1.45 0.35 1269 26 26 4.69 1.08 0.23 1171 4.56 1.05 0.23 1232 4.49 1.03 0.23 1269 4.35 1.00 0.23 1305 27 18 4.00 3.00 0.75 976 3.83 2.87 0.75 1025 3.67 2.75 0.75 1074 3.54 2.65 0.75 1122 27 20 4.17 2.62 0.63 1025 4.00 2.52 0.63 1086 3.88 2.44 0.63 1110 3.74 2.36 0.63 1159 27 22 4.34 2.21 0.51 1061 4.18 2.13 0.51 1129 4.08 2.08 0.51 1159 3.91 1.99 0.51 1208 27 24 4.56 1.78 0.39 1110 4.39 1.71 0.39 1171 4.28 1.67 0.39 1208 4.15 1.62 0.39 1269 27 26 4.69 1.27 0.27 1171 4.56 1.23 0.27 1232 4.49 1.21 0.27 1269 4.35 1.18 0.27 1305 28 18 4.00 3.16 0.79 976 3.83 3.02 0.79 1025 3.67 2.90 0.79 1074 3.54 2.79 0.79 1122 28 20 4.17 2.79 0.67 1025 4.00 2.68 0.67 1086 3.88 2.60 0.67 1110 3.74 2.51 0.67 1159 28 22 4.34 2.38 0.55 1061 4.18 2.30 0.55 1129 4.08 2.24 0.55 1159 3.91 2.15 0.55 1208 28 24 4.56 1.96 0.43 1110 4.39 1.89 0.43 1171 4.28 1.84 0.43 1208 4.15 1.78 0.43 1269 28 26 4.69 1.45 0.31 1171 4.56 1.41 0.31 1232 4.49 1.39 0.31 1269 4.35 1.35 0.31 1305 29 18 4.00 3.32 0.83 976 3.83 3.17 0.83 1025 3.67 3.05 0.83 1074 3.54 2.93 0.83 1122 29 20 4.17 2.96 0.71 1025 4.00 2.84 0.71 1086 3.88 2.75 0.71 1110 3.74 2.66 0.71 1159 29 22 4.34 2.56 0.59 1061 4.18 2.47 0.59 1129 4.08 2.41 0.59 1159 3.91 2.31 0.59 1208 29 24 4.56 2.14 0.47 1110 4.39 2.06 0.47 1171 4.28 2.01 0.47 1208 4.15 1.95 0.47 1269 29 26 4.69 1.64 0.35 1171 4.56 1.59 0.35 1232 4.49 1.57 0.35 1269 4.35 1.52 0.35 1305 30 18 4.00 3.48 0.87 976 3.83 3.33 0.87 1025 3.67 3.19 0.87 1074 3.54 3.08 0.87 1122 30 20 4.17 3.12 0.75 1025 4.00 3.00 0.75 1086 3.88 2.91 0.75 1110 3.74 2.81 0.75 1159 30 22 4.34 2.73 0.63 1061 4.18 2.63 0.63 1129 4.08 2.57 0.63 1159 3.91 2.46 0.63 1208 30 24 4.56 2.32 0.51 1110 4.39 2.24 0.51 1171 4.28 2.18 0.51 1208 4.15 2.12 0.51 1269 30 26 4.69 1.83 0.39 1171 4.56 1.78 0.39 1232 4.49 1.75 0.39 1269 4.35 1.70 0.39 1305 31 18 4.00 3.64 0.91 976 3.83 3.48 0.91 1025 3.67 3.34 0.91 1074 3.54 3.22 0.91 1122 31 20 4.17 3.29 0.79 1025 4.00 3.16 0.79 1086 3.88 3.06 0.79 1110 3.74 2.95 0.79 1159 31 22 4.34 2.90 0.67 1061 4.18 2.80 0.67 1129 4.08 2.73 0.67 1159 3.91 2.62 0.67 1208 31 24 4.56 2.51 0.55 1110 4.39 2.41 0.55 1171 4.28 2.36 0.55 1208 4.15 2.28 0.55 1269 31 26 4.69 2.02 0.43 1171 4.56 1.96 0.43 1232 4.49 1.93 0.43 1269 4.35 1.87 0.43 1305 32 18 4.00 3.80 0.95 976 3.83 3.63 0.95 1025 3.67 3.49 0.95 1074 3.54 3.36 0.95 1122 32 20 4.17 3.46 0.83 1025 4.00 3.32 0.83 1086 3.88 3.22 0.83 1110 3.74 3.10 0.83 1159 32 22 4.34 3.08 0.71 1061 4.18 2.97 0.71 1129 4.08 2.90 0.71 1159 3.91 2.78 0.71 1208 32 24 4.56 2.69 0.59 1110 4.39 2.59 0.59 1171 4.28 2.53 0.59 1208 4.15 2.45 0.59 1269 32 26 4.69 2.21 0.47 1171 4.56 2.14 0.47 1232 4.49 2.11 0.47 1269 4.35 2.05 0.47 1305

CAPACITY : 3.4 kW INPUT : 1220 W SHF : 0.69

PERFORMANCE DATA COOL operation

Page 21

OUTDOOR DB(:)

INDOOR INDOOR

35 40 43

DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

21 18 3.33 1.70 0.51 1196 3.06 1.56 0.51 1269 2.94 1.50 0.51 1293 21 20 3.50 1.37 0.39 1244 3.26 1.27 0.39 1305 3.15 1.23 0.39 1342 22 18 3.33 1.83 0.55 1196 3.06 1.68 0.55 1269 2.94 1.62 0.55 1293 22 20 3.50 1.51 0.43 1244 3.26 1.40 0.43 1305 3.15 1.35 0.43 1342 22 22 3.71 1.15 0.31 1293 3.47 1.08 0.31 1366 3.35 1.04 0.31 1391 23 18 3.33 1.97 0.59 1196 3.06 1.81 0.59 1269 2.94 1.74 0.59 1293 23 20 3.50 1.65 0.47 1244 3.26 1.53 0.47 1305 3.15 1.48 0.47 1342 23 22 3.71 1.30 0.35 1293 3.47 1.21 0.35 1366 3.35 1.17 0.35 1391 24 18 3.33 2.10 0.63 1196 3.06 1.93 0.63 1269 2.94 1.85 0.63 1293 24 20 3.50 1.79 0.51 1244 3.26 1.66 0.51 1305 3.15 1.60 0.51 1342 24 22 3.71 1.45 0.39 1293 3.47 1.35 0.39 1366 3.35 1.31 0.39 1391 24 24 3.91 1.06 0.27 1342 3.67 0.99 0.27 1403 3.57 0.96 0.27 1434 25 18 3.33 2.23 0.67 1196 3.06 2.05 0.67 1269 2.94 1.97 0.67 1293 25 20 3.50 1.93 0.55 1244 3.26 1.80 0.55 1305 3.15 1.73 0.55 1342 25 22 3.71 1.59 0.43 1293 3.47 1.49 0.43 1366 3.35 1.44 0.43 1391 25 24 3.91 1.21 0.31 1342 3.67 1.14 0.31 1403 3.57 1.11 0.31 1434 26 18 3.33 2.37 0.71 1196 3.06 2.17 0.71 1269 2.94 2.09 0.71 1293 26 20 3.50 2.07 0.59 1244 3.26 1.93 0.59 1305 3.15 1.86 0.59 1342 26 22 3.71 1.74 0.47 1293 3.47 1.63 0.47 1366 3.35 1.57 0.47 1391 26 24 3.91 1.37 0.35 1342 3.67 1.29 0.35 1403 3.57 1.25 0.35 1434 26 26 4.11 0.95 0.23 1391 3.88 0.89 0.23 1452 3.76 0.86 0.23 1482 27 18 3.33 2.50 0.75 1196 3.06 2.30 0.75 1269 2.94 2.21 0.75 1293 27 20 3.50 2.21 0.63 1244 3.26 2.06 0.63 1305 3.15 1.98 0.63 1342 27 22 3.71 1.89 0.51 1293 3.47 1.77 0.51 1366 3.35 1.71 0.51 1391 27 24 3.91 1.52 0.39 1342 3.67 1.43 0.39 1403 3.57 1.39 0.39 1434 27 26 4.11 1.11 0.27 1391 3.88 1.05 0.27 1452 3.76 1.01 0.27 1482 28 18 3.33 2.63 0.79 1196 3.06 2.42 0.79 1269 2.94 2.32 0.79 1293 28 20 3.50 2.35 0.67 1244 3.26 2.19 0.67 1305 3.15 2.11 0.67 1342 28 22 3.71 2.04 0.55 1293 3.47 1.91 0.55 1366 3.35 1.84 0.55 1391 28 24 3.91 1.68 0.43 1342 3.67 1.58 0.43 1403 3.57 1.54 0.43 1434 28 26 4.11 1.28 0.31 1391 3.88 1.20 0.31 1452 3.76 1.16 0.31 1482 29 18 3.33 2.77 0.83 1196 3.06 2.54 0.83 1269 2.94 2.44 0.83 1293 29 20 3.50 2.49 0.71 1244 3.26 2.32 0.71 1305 3.15 2.23 0.71 1342 29 22 3.71 2.19 0.59 1293 3.47 2.05 0.59 1366 3.35 1.98 0.59 1391 29 24 3.91 1.84 0.47 1342 3.67 1.73 0.47 1403 3.57 1.68 0.47 1434 29 26 4.11 1.44 0.35 1391 3.88 1.36 0.35 1452 3.76 1.31 0.35 1482 30 18 3.33 2.90 0.87 1196 3.06 2.66 0.87 1269 2.94 2.56 0.87 1293 30 20 3.50 2.63 0.75 1244 3.26 2.45 0.75 1305 3.15 2.36 0.75 1342 30 22 3.71 2.33 0.63 1293 3.47 2.18 0.63 1366 3.35 2.11 0.63 1391 30 24 3.91 1.99 0.51 1342 3.67 1.87 0.51 1403 3.57 1.82 0.51 1434 30 26 4.11 1.60 0.39 1391 3.88 1.51 0.39 1452 3.76 1.47 0.39 1482 31 18 3.33 3.03 0.91 1196 3.06 2.78 0.91 1269 2.94 2.68 0.91 1293 31 20 3.50 2.77 0.79 1244 3.26 2.58 0.79 1305 3.15 2.48 0.79 1342 31 22 3.71 2.48 0.67 1293 3.47 2.32 0.67 1366 3.35 2.24 0.67 1391 31 24 3.91 2.15 0.55 1342 3.67 2.02 0.55 1403 3.57 1.96 0.55 1434 31 26 4.11 1.77 0.43 1391 3.88 1.67 0.43 1452 3.76 1.62 0.43 1482 32 18 3.33 3.17 0.95 1196 3.06 2.91 0.95 1269 2.94 2.79 0.95 1293 32 20 3.50 2.91 0.83 1244 3.26 2.71 0.83 1305 3.15 2.61 0.83 1342 32 22 3.71 2.63 0.71 1293 3.47 2.46 0.71 1366 3.35 2.38 0.71 1391 32 24 3.91 2.31 0.59 1342 3.67 2.17 0.59 1403 3.57 2.11 0.59 1434 32 26 4.11 1.93 0.47 1391 3.88 1.82 0.47 1452 3.76 1.77 0.47 1482

CAPACITY : 3.4 kW INPUT : 1220 W SHF : 0.69

MUZ-A12RV -

PERFORMANCE DATA COOL operation

Page 22

OUTDOOR DB(:)

INDOOR

-10 -5 0 5 10 15 20

DB(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT

15 3.02 1027 3.65 1232 4.27 1390 4.90 1501 5.52 1596 6.10 1643 6.72 1675 21 2.88 1106 3.46 1311 4.08 1454 4.66 1564 5.28 1643 5.86 1691 6.46 1754 26 2.59 1185 3.22 1390 3.79 1533 4.42 1643 5.04 1722 5.62 1770 6.24 1817

CAPACITY : 4.8 kW INPUT : 1580 W

MUZ-A09RV -

MUZ-A12RV -

PERFORMANCE DATA HEAT operation

OUTDOOR DB(:)

INDOOR

-10 -5 0 5 10 15 20

DB(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT

15 2.27 644 2.74 772 3.20 871 3.67 941 4.14 1000 4.57 1030 5.04 1049 21 2.16 693 2.59 822 3.06 911 3.49 980 3.96 1030 4.39 1059 4.84 1099 26 1.94 743 2.41 871 2.84 960 3.31 1030 3.78 1079 4.21 1109 4.68 1139

CAPACITY : 3.6 kW INPUT : 990 W

Page 23

MICROPROCESSOR CONTROL9

Signal transmitting section

Operation display section

OPERATE /STOP

(ON /OFF)button

OPERATION SELECT button

FAN SPEED CONTROL button

ON-TIMER button

CLOCK SET button

HR. button

MIN. button

(TIME SET button)

TEMPERATURE buttons

VANE CONTROL button

OFF-TIMER button

RESET button

ON/OFF TOO

WARM

TOO

COOL

HR. MIN.

CLOCK

RESET

CLOCK

MODE

FAN

VANE

START

STOP

ECONO COOL button

ECONO COOL

I FEEL

COOL DRY HEAT

6 00

1 00

SWING

SWING button

INDOOR UNIT DISPLAY SECTION

Once the controls are set, the same operation mode can be repeated by simply turning the OPERATE/STOP button ON. Indoor unit receives the signal with a beep tone. When the system turns off, 3-minute time delay will operate to protect system from overload and compressor will not restart for

3 minutes.

MSZ-A09RVMSZ-A12RV-

GREEN SIGN

GREEN SIGN shows the current room temperature and set temperature. The room temperature indicated on the temperature monitor lamp may not be exactly the same as the actual room temperature.

Available the set temperature range is 16:~31:, however, indication range of temperature monitor lamp is 21:~30:.

The set temperature (lighting) and room temperature (blinking) are displayed.

When the room temperature or set temperature is out of the indication range

If the set temperature is lower than 21:, indicating lamp at 21: is lighting. And if the room temperature is lower than 21:, indicating lamp at 21: is blinking.

If the set temperature is higher than 30:, indicating lamp at 30: is lighting. And if the room temperature is higher than 30:, indicating lamp at 30: is blinking.

GREEN SIGN

21 22 23 24 25 26 27 28 29 30

Blinking lamp shows the room temperature

Lighting lamp shows the set temperature

(Example) When the set temperature is 26:, indicating lamp at 26:

is lighting. When the room temperature is 27.5: or higher and lower than 28.5:, indicating lamp at 28: is blinking.

GREEN SIGN

21 22 23 24 25 26 27 28 29 30

Blinking lamp shows the room temperature

Lighting lamp shows the set temperature

w When the set temperature and room temperature are the same, corresponding indicating lamp is lighting.

NOTE: When the unit is not operating : Both POWER MONITOR lamp and green sign lamps are off. When ON- Timer is set : POWER MONITOR lamp is on. All green sign lamps are off. When OFF- Timer is set : The lamp indication is as same as ordinary operation.

(Example) When the set temperature is 28:, indicating lamp at 28:

is lighting. When the room temperature is 30: or higher, indicating lamp at 30: is blinking.

2.When the room temperature or set temperature is within the indication range

WIRELESS REMOTE CONTROLLER

Page 24

Model

COOL mode of

"I FEEL CONTROL"

DRY mode of

"I FEEL CONTROL"

HEAT mode of

"I FEEL CONTROL"

Initial room temperature Initial set temperature

26:

26: or more

26: or less

23: or less

23: to 25:

24:

Initial room temperatureminus 2:

❈1

4. The initial set temperature is decided by the initial room temperature.

9-1. “I FEEL CONTROL” ( ) OPERATION

1. Press OPERATE/STOP button on the remote controller. OPERATION INDICATOR lamp of the indoor unit will turn on with a beep tone.

2. Press OPERATION SELECT button to set “I FEEL CONTROL”( ) Then a beep tone is heard.

3. The operation mode is determined by the initial room temperature at start-up of the operation.

Example

Previous operation COOL mode of “I FEEL CONTROL” or COOL mode

● Once the mode is fixed, the mode will not change by room temperature afterwards.

● Under the ON-TIMER ( ) operation, mode is determined according to the room temperature as the operation

starts.

● When the system is stopped with the OPERATE/STOP button on the remote controller, and restarted within 2 hours in “I

FEEL CONTROL” ( ) mode, the system operates in previous mode automatically regardless of the room temperature.

Mode

COOL mode of

"I FEEL CONTROL"

DRY mode of

"I FEEL CONTROL"

HEAT mode of

"I FEEL CONTROL"

Initial room temperature

more than 25:

23: to 25:

less than 23:

Example

Previous operation COOL mode of “I FEEL CONTROL” or COOL mode

When the system is restarted after 2 hours, the operation mode is determined by the initial room temperature at start-up

of the operation.

Restart

COOL mode of “I FEEL CONTROL”

Restart

COOL or DRY or HEAT mode of “I FEEL CONTROL” that determined by initial room temperature start-up of the operation.

❈1 After the system restarts by the remote controller, the system operates with the previous set temperature regardless

of the initial set temperature The set temperature is calculated by the previous set temperature.

Page 25

5. TEMPERATURES buttons In “I FEEL CONTROL” (h)mode, set temperature is decided by the microprocessor based on the room temperature.

In addition, set temperature is controlled by TOO WARM or TOO COOL buttons when you feel too cool or too warm. Pressing the TOO WARM or TOO COOL button emits a beep tone.

● Fuzzy control

When the TOO COOL or TOO WARM button is pressed, the microprocessor changes the set temperature, considering the room temperature, the frequency of pressing TOO COOL or TOO WARM button and the user’s preference to heat or cold. So this is called “Fuzzy control”, and works only in “I FEEL CONTROL” mode. In DRY mode of “I FEEL CONTROL”, the set temperature doesn’t change.

▼ TOO COOL… To raise the set temperature 1 ~ 2 degrees (: )

▲ TOO WARM … To lower the set temperature 1 ~ 2 degrees (:)

— Cool mode of “I FEEL CONTROL” —

1. Followings are the fan speed in AUTO.

Room temperature minus set temperature: 2 degrees or moreover··························Hi Room temperature minus set temperature:

1 degree or more and less than 2 degrees ··········Me

Room temperature minus set temperature: less than 1 degree·································Lo

2. Time control

When the three conditions below have been satisfied for 1 hour and 45 minutes, compressor stops for 3 minutes. (1).Compressor has been continuously operating. (2).Indoor fan speed is Lo or Me (3).Room temperature is below 26:. When compressor turns off half way,.the accumulated time is cancelled. When compressor turns on again, time counting starts from the beginning. When the indoor fan speed becomes Hi or the room temperature exceeds 26:, timecounting stops temporarily. After, when the above conditions are satisfied again, time counting restarts. The indoor fan operates at set speed.

1.5 deg.

4 deg.

2 deg.

1 deg.

Temperature difference

Difference between room temperature and set temperature during operation.

Fan speed

The operational frequency of the compressor is controlled based on the temperature of the indoor coil thermistor(RT12).

• The indoor fan maintains the actual speed of the moment.

—DRY mode of “I FEEL CONTROL”—

The system for dry operation uses the same refrigerant circuit as the cooling circuit. The compressor and the indoor fan are controlled by the temperature and the microprocessor. By such controls, indoor flow amounts will be reduced in order to lower humidity without much room temperature decrease. The operation of the compressor and indoor fan is as follows.

Compressor operates by temperature control and time control.

1 Set temperature is controlled to fall 2°C as initial set temperature. 2 Indoor fan and outdoor fan operate in the same cycle as the compressor. 3 Operational frequency control of compressor is fixed 30Hz.

Temperature of indoor coil thermistor:Th

approx. 8°C or above

approx. 6°C to 8°C approx. 3°C to 6°C

approx. 3°C or below

Operation frequency

normal

fixed

lower at the rate of 3Hz/min

lower at the rate of 6Hz/min Compressor is turned OFF for 5 minutes when left temperature continues for 5 minutes or more.

3. Coil frost prevention mode

NOTE ● Coil frost prevention during DRY mode of “I FEEL CONTROL”

The operation is same as coil frost prevention during COOL mode of “I FEEL CONTROL” .

Page 26

— HEAT mode of “I FEEL CONTROL” —

3. Defrosting in DRY mode

The operational frequency of the compressor is controlled based on the temperature of the indoor coil thermistor (RT12).

The indoor fan maintains the actual speed of the moment. However, it changes to Lo speed when the compressor stops.

Temperature of indoor coil thermistor:RT12

approx. 8°C or above

approx. 6°C to 8°C approx. 3°C to 6°C

approx. 3°C or below

Operation frequency

normal

fixed

lower at the rate of 3Hz/min

lower at the rate of 6Hz/min Compressor is turned OFF for 5 minutes when left temperature

continues for 5 minutes or more.

1. Indoor fan speed control

(1) Indoor fan operates at the set speed by FAN SPEED CONTROL button.

In Auto the fan speed is as follows.

Set temperature minus room temperature: 2 degrees or more················································· Hi Set temperature minus room temperature: Between 1 and 2 degrees····································· Me Set temperature minus room temperature: less than 1 degree················································· Lo

1 deg.

1.7 deg.

2 deg.

4 deg.

Initial temperature difference

Fan speed

Difference between room temperature and set temperature during

(2) Cold air prevention control

1 When the compressor is not operating,

(1) if the temperature of indoor coil thermistor RT12 is 18°C or less, the fan stops. (2) if the temperature of indoor coil thermistor RT12 is more than 18°C, the fan operates at VLo.

2 When the compressor is operating,

(1) if the temperature of RT12 is 22°C or more, the fan operates at set speed. (2) if the temperature of RT12 is less than 22°C and

(1) if the temperature of room temperature thermistor RT11 is 15°C or less, the fan stops. (2) if the temperature of room temperature thermistor RT11 is more than 15°C, the fan operates at VLo.

NOTE : At initial and after defrosting, when the RT12 is from 18: to 22:, Cold Air Prevention control works.

(3) Warm air control.

When the following any condition of 1(a. ~ d.) and the condition of 2 are satisfied at the same time, warm air control works.

1 a.) when the operation mode has been changed to HEAT mode

b.) when cold air prevention has been released c.) when defrosting has been finished d.) when the compressor starts in HEAT mode

2 When the temperature of indoor coil thermistor RT12 is less than 37°C. When warm air control works, the fan speed changes as follows to blow out warm air gradually.

Gradation of fan speed in initial

The upper limit of the fan speed in MANUAL is the set speed. The upper limit of the fan speed in AUTO is the speed decided by indoor fan speed control.(Refer to 8-4.1.(1).) When the temperature of RT12 has been 37°C or more, or when the set speed has been changed, this control is released and the fan speed is the set speed.

(4) Flow soft control

When the thermostat (compressor) is off, the indoor fan operates as follows.

Released

Cold Air Prevention

18:RT12 22:

Fan speed Set speed

VLo or stop

less than 2 minutes Lo 2 minutes to 4 minutes Me more than 4 minutes Hi

NOTE : When the thermostat(compressor) turns on, the fan will operate

at set speed. But until cold air prevention and warm air control is released, the fan speed follow them.

Compressor

OFF

Fan VLo

Set speed

Page 27

2. High pressure protection

In HEAT mode and manually-operated HEAT mode, the indoor coil thermistor detects the temperature at the indoor heat

exchanger and controls the compressor rotational frequency to prevent the condensing pressure from increasing

excessively.

3. Overload starting

When the room temperature thermistor reads 18°C or above, the compressor runs with its maximum frequency regulated for

3 minutes after the start-up.

4. Defrosting in HEAT mode

• conditions to start defrosting:

a) The defrost thermistor attached to the outdoor heat exchanger read -3°C or below.

b) The cumulative operation time of the compressor has reached any of the set values: 30, 40, 45, 55, 65, 75, 85, 95, 105,

115 minutes.

c) More than 5 minutes have passed since the start-up of the compressor.

When the above three conditions, a), b), and c), are satisfied, the defrosting starts.

wSet value of compressor operation time(hereinafter referred to as defrost interval)

The first defrost interval is 40 minutes long, and the second 45 minutes long.The third and subsequent intervals are set to be longer, and less frequent, depending on defrosting time. The third and subsequent defrost intervals follow any of the three patterns …5 or 10 minutes longer, the same, or 5 or 10 minutes shorter compared with the previous defrost interval … with the longest 115 minutes and the shortest 30 minutes.

• Conditions to end defrosting Defrosting is released when any of the following condition is satisfied: a) The defrost thermistor reads 13°C or above. b) Defrosting time has exceeded 10 minutes. c) Some other mode than HEAT mode is set during defrosting.

Time chart of defrost in HEAT mode (reverse type)

normal

indoor fan

Compressor normal

outdoor fan moter

Reversing valve

ON ON

OFF

100Hz

horizontal

normal

vertical vanes

normal

VLo (temperature of indoor coil thermistor > 18:)

second

second1second

5 second

second

STOP

second

MAX Hz

Page 28

9-2. COOL ( ) OPERATION

(1) Press OPERATE/STOP(ON/OFF) button.Operation indicator lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with the OPERATION SELECT button. (3) Press TEMPERATURE buttons (TOO WARM or TOO COOL button)to select the desired temperature.

The setting range is 16 ~ 31°C

✻ Indoor fan continues to operate regardless of thermostat’s OFF-ON ✻ Coil frost prevention is same as COOL mode of “I FEEL CONTROL”

9-3. DRY ( ) OPERATION

(1) Press OPERATE/STOP(ON/OFF) button.

Operation indicator lamp of the indoor unit turns on with a beep

tone. (2) Select DRY mode with the OPERATION SELECT button. (3) The microprocessor reads the room temperature and determines

the set temperature. Set temperature is as shown on the right

chart.

DRY operation will not function when the room temperature is

13°C or below. (4) When DRY operation functions the fan speed is lower than cool

operation expect at (fan speed) Lo notch.

9-4. HEAT ( ) OPERATION

(1) Press OPERATE/STOP(ON/OFF) button.

Operation indicator lamp of the indoor unit turns on with a beep tone. (2) Select HEAT mode with the OPERATION SELECT button. (3) Press TEMPERATURE buttons (TOO WARM or TOO COOL button) to select the desired temperature.

The setting range is 16 ~ 31°C.

10 15 20 25 30 35

Set temperature

Initial room temperature

Set temperature and initial room temperature in dry mode

9-5. FAN MOTOR CONTROL

1. Rotational frequency feedback control The indoor fan motor is equipped with a rotational frequency sensor, and outputs signal to the microprocessor to feedback the rotational frequency. Comparing the current rotational frequency with the target rotational frequency (Hi,Me,Lo) the microprocessor controls SR11 and adjusts fan motor electric current to make the current rotational frequency close to the target rotational frequency. With this control, when the fan speed is switched, the rotational frequency changes smoothly.

2. Fan motor lock-up protection When the rotational frequency feedback signal is not output for 12 seconds, (or when the microprocessor cannot detect the signal for 12 seconds) the fan motor is regarded locked-up. Then the electric current to the fan motor is shut off. 3 minutes later, the electric current is applied to the fan motor again. During the fan motor lock-up, the operation indicator flashes to show the fan motor abnormality. (See page 45.)

Page 29

5. Dew prevention During COOL or DRY operation with the vane angle at Angle 4 or 5 when the compressor cumulative operation time

exceeds 1 hour, the vane angle automatically changes to Angle 1 for dew prevention.

6 SWING MODE ( )

By pressing the SWING button,vane swings horizontally. The remote controller displays “ ”. The swing operation will be cancelled if any of the following .operations are performed.

● The unit is turned off.

The vertical vanes will return to their positions just before the swing operation was started.

● The operation mode(AUTO, COOL, DRY or HEAT)is changed.

The vertical vanes will return to their positions just before the swing operation was started.

● The “ ” button is pressed.

The vertical vanes stop at the position when the button is pressed.

3. Positioning The vane is once pressed to the vane stopper below to confirm the standard position and then set to the desired angle.

The positioning is decided as follows. (a) When the operate button is pushed. (POWER ON) (b) When the stop button is pushed. (POWER OFF) (c) When the vane control change AUTO to MANUAL. (d) When the SWING is finished. (e) When the test run starts. (f) When the power supply is ON.

4. VANE AUTO ( ) mode In VANE AUTO mode, the microprocessor automatically determines the vane angle and operation to make the optimum

room-temperature distribution.

(1) In COOL and DRY operation

(2) In HEAT operation

Vane angle is fixed to Angle 1.

Vane angle is fixed to Angle 4.

9-6. AUTO VANE OPERATION

(1) Vane motor drive

These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approx. 12V) transmitted from indoor microprocessor.

(2) The horizontal vane angle and mode changes as follows by pressing the VANE CONTROL ( ) button.

Page 30

COOL and DRY

HEAT

About 100-

About 150-

Horizontal AIR FLOW blowing range

7 Horizontal AIR FLOW ( )

The auto vane angle changes as follows by pressing the VANE CONTROL( ) button.

● Press the “ ” button.

The vertical vanes begin moving.

● When the vanes move to the desired position, press the “ ” button again.

The vanes stop moving.

NOTE

If the “ ” button is not pressed again within 30 seconds in COOL or DRY mode or within 1 minute in HEAT mode after the vanes start moving, the vanes will automatically return to their original positions.

8. Cold air prevention in HEAT mode. When either of the following conditions occurs in HEAT mode, the auto vane angle changes to Angle 1 automatically to prevent cold air blowing on users.

① Compressor is not operating. ➁ Defrosting is performed. ➂ Indoor coil thermistor RT12 reads 24: or below. ➃ Indoor coil temperature is raising from 24°C or below, but it does not exceed 28:.

(8) ECONO COOL ( ) operation

When the ECONO COOL button is pressed in MANUAL COOL mode, the horizontal vane swings in various cycle according to the temperature of indoor heat exchanger(RT12). Also SET TEMPERATURE is automatically set 2°C higher than that in MANUAL COOL mode.

•SWING operation In swing operation of ECONO COOL operation air flow is initially blew out upward(levelly). According to the temperature of indoor coil thermistor RT12 at starting of this operation, next downward blow time is decided.Then when the downward blow has been finished,next upward blow time is decided. The air conditioner repeats the swing operation in various cycle as follows. However, for initial 10 min. the swing operation is performed in table G~H for quick cooling(but G : RT 12 is 24: or less). Also, after 10 min. when the difference of set temperature and room temperature is more than 2 degrees, the swing operation is performed in table D~H for more cooling(but D: RT12 is 20: or less).

Temperature of indoor

coil thermistor RT12

more than 24°C

Downward blow time

(sec.)

22°C to 24°C

21°C to 22°C

20°C to 21°C

18°C to 20°C

17°C to 18°C

15°C to 17°C

15°C or less

Upward(level) blow time

(sec.)

•ECONOmical operation (SET TEMPERATURE)

When this operation is selected in MANUAL COOL mode, SET TEMPERATURE is automatically set 2°C higher than that in MANUAL COOL mode. By above SWING operation temperature that you feel can decrease by 2°C. So keeping comfort, energy can be saved.

Page 31

PROGRAM TIMER

(Example 1) The current time is 8:00 PM.

The unit turns off at 11:00 PM, and on at 6:00 AM.

● The OFF timer and ON timer can be used in combination.

● “ ” and “ ” display shows the order of the OFF timer and ON timer operation.

(Example 2) The current time is 11:00 AM.

The unit turns on at 5:00 PM, and off at 9:00 PM.

NOTE : TIMER setting will be cancelled by power failure or breaker functioning.

2. Cancel

TIMER setting can be cancelled with the ON or OFF TIMER buttons. (“ ” or “ ”) To cancel the ON timer, press the “ ” button.

To cancel the OFF timer, press the “ ” button. TIMER is cancelled and the display of set time disappears.

9-7. TIMER OPERATION

1. How to set the timer

(1) Press OPERATE/STOP(ON/OFF) button to start the air conditioner. (2) Check that the current time is set correctly. NOTE : Timer operation will not work without setting the current time. Initially “AM0:00” blinks at the current time display

of TIME MONITOR, so set the current time correctly with CLOCK SET button.

(3) Press ON or OFF TIMER buttons to select the operation.

“ ” button... AUTO START operation (ON timer) “ ” button... AUTO STOP operation (OFF timer)

(4) Press HR. and MIN. button to set the timer. Time setting is 10-minute units.

HR. and MIN. button will work when “ ” or “ ” mark is flashing. These marks disappear in 1 minute. After setting the ON timer, check that Operation indicator lamp of the indoor unit lights.

NOTE1 : Be sure to place the remote controller at the position where its signal can reach the air conditioner even during

TIMER operation, or the set time may deviate within the range of about 10 minutes.

NOTE2 : Reset the timer in the following cases, or the set time may deviate and other malfunctions may occur.

● A power failure occurs.

● The circuit breaker functions.

Indoor coil temperature

Angle 1

Normal

28:

Page 32

9-8. EMERGENCY-TEST OPERATION

When the remote controller is missing, has failed or the batteries run down, press the EMERGENCY ON/OFF button on the front of the indoor unit. The unit will start and the OPERATION INDICATOR will light. The first 30 minutes of operation will be the test run operation. This operation is for servicing. The indoor fan runs at high speed and the system is in continuous operation. The thermostat is ON and the timer is reset to normal. After 30 minutes of test run operation the system shifts to EMERGENCY COOL, HEAT MODE with a set temperature of 24°C. The fan shifts to Me speed. This operation continues until the EMERGENCY OPERATION switch button is pressed or a button on the remote controller is pressed, then normal operation will start. The coil frost prevention circuit operates in this mode, and defrosting operates too. In the test run or emergency operation, the horizontal vane operates in AUTO mode with a set temperature of 24°C. Defrosting of outdoor heat exchanger works in EMERGENCY HEAT MODE. NOTE : Do not press the EMERGENCY OPERATION switch during normal operation.

GREEN SIGN

21 22 23 24 25 26 27 28 29 30

GREEN SIGN

21 22 23 24 25 26 27 28 29 30

GREEN SIGN

21 22 23 24 25 26 27 28 29 30

Light up Blinking light

Press once < Cooling >

Press again < Heating >

Press once again < Stop >

EMERGENCY OPERATION switch

Blinking lamp shows the room temperature

Lighting lamp shows the set temperature

9-9. POWER MONITOR LAMP

Color of the lamp

RED

ORANGE

GREEN

Operating condition The unit operates at high power. The unit operates at middle power. The unit operates with energy-saving.

The color of POWER MONITOR lamp is GREEN in any of the following cases.

• When ON-timer is standby

• In DRY operation

• In EMERGENCY operation

• When defrosting of the outdoor unit is being done in HEAT operation

Page 33

9-10. Operational frequency control of outdoor unit

1. Outline The operational frequency is decided by following the procedures below:

First, set the target operational frequency based on the difference between the room temperature and the set temperature. Second, regulate the target operational frequency by discharge temperature protection, high pressure protection, electric current protection and overload protection and also by the maximum/minimum frequency.

(1) maximum/ minimum frequency in each operation mode.

w The maximum frequency in COOL mode is limited according to operation hours, as shown below.

(2) Frequency change speed

During increasing frequency

During decreasing frequency

Operational frequency MUZ-A09RV- E1 MUZ-A12RV- E1

10Hz to 14Hz 0.5 sec./Hz 15Hz to 79Hz 5 sec./Hz

80Hz to 150Hz 0.5 sec./Hz

Operational frequency MUZ-A09RV- E1 MUZ-A12RV- E1

10Hz to 42Hz 1 sec./Hz

43Hz to 150Hz 0.5 sec./Hz

Minimum

frequency

15 15

Model

MSZ-A09RV MSZ-A12RV

COOL (indoor fan speed : Hi)

Rating

frequency

53 82

Maximum frequency

80 88

Minimum

frequency

16 16

HEAT

Rating

frequency

67 98

Maximum frequency

115

DRY

22/27 22/27

1Hr

Time

Maximum frequency

frequency

Rating or under-rating frequency

Page 34

9-11 .Electronic expansion valve control (LEV control)

(1)Outline of LEV control

The LEV basic control is comprised of setting LEV opening degree to the standard opening degrees set for each operational frequency of the compressor. However, when any change in indoor/outdoor temperatures or other factors cause air conditioning load fluctuation, the LEV control also works to correct LEV opening degree based on discharge temperature (Shell temperature) of the compressor, developing the unit’s performance.

(2)Specification of LEV control

Control range from min. 33 pulse to max. 500 pulse. Actuating speed LEV opens 40 pulse/sec. and close 90 pulse/sec. Opening degree adjustment LEV opening degree is always adjusted in opening direction.

(When reducing the opening degree, LEV is once overclosed, and then adjusted to the proper degree by opening.

Unit OFF LEV remains at max. opening degree (reaches max. opening

degree approx. 15 minutes after compressor stops)

Remote controller ON LEV is positioned. (first full-closed at zero pulse and then

positioned.)

During 2 to 15 minutes after compressor starts Opening degree is adjusted according to standard opening

degree. (Standard opening degree is set for each rotational frequency of compressor)

More than 15 minutes have passed since compressor

start-up

LEV opening degree is corrected to get target discharge temperature of compressor. (For discharge temperature lower than target temperature, LEV is corrected in closing direction.) (For discharge temperature higher than target temperature, LEV is corrected in opening direction.) wIt may take more than 30 minutes to reach target temperature, depending on operating conditions.

Thermostat OFF LEV starts to open every 3 pulse/sec.

from the same opening degree as that when the Unit turned IFF (and becomes full-opened after approx. 15 minutes.)

Thermostat ON LEV is controlled in the same way as that is after the

compressor has started up.

Defrosting in HEAT mode LEV is adjusted to open 350 pulse.

general operation

standard

specification

Page 35

In COOL mode, the two indoor coil thermistor (one main and one sub) sense temperature ununiformity (super heat) at the heat exchanger, And when teperature difference have developed, the indoor coil thermistors adjust LEV opening to get approxiimate 10 degrees lower temperature than the target temperature in the table above, thus diminishing super heat.

(3) Time chart

OFF Time

Time

The operational frequency of the compressor

Commanded to open

Standard opening degree

opening degree is corrected according to discharge temperature

positioning

air conditioner ON

Air conditioner OFF (thirmostat off)

LEV opening degree

15 min.

(4) Control data

06 05 04 03 02

LEV opening degree

A(target discharge temperature)

30 50 70

The operational frequency of the compressor

90 110 130

(Hz)

58/49B60/58C68/67D70/70E72/72F72/72

(a) Reference value of target discharge temperature

(Cooling :/Heating :)

110/8002150/10003200/12004200/13005200/13006200/130

(b) Reference value of LEV standard degreeperature

(COOL/HEAT pulse)

Page 36

9-13. Reversing valve control

COOL&DRY mode

. . . . . . . . .

ON(voltage applied)

The Reversing valve turns ON as soon as thermostat turns ON. The Reversing valve turns OFF 15 minutes after the thermostat turns OFF.

HEAT mode

. . . . . . . . . . . . . . .

OFF(voltage not applied)

During normal HEAT operation the Reversing valve is OFF.

w The Reversing valve does not turn ON before the compressor starts up.

OFF

Outdoor fan

Compressor

5.0 sec. 15 sec.

ON OFF

Compressor

Outdoor fan

Reversing valve

ON OFF

<COOL>

5 seconds

<HEAT>

5 seconds

9-12.Outdoor fan motor control

The AC fan motor turns ON/OFF, interlocking with the compressor. [ON] The AC fan motor turns on 5.0 seconds before the compressor starts up. [OFF] The AC fan motor turns off 15 seconds after the compressor stops running.

Page 37

9-14. Indoor fan motor control

The detected rotational frequency of the fan motor is feed backed to the microprocessor and then the microprocessor works to keep the rotational frequency at a fixed value against load fluctuation.

(1) Circuit block diagram

(2) Control system

The microprocessor adjusts rotational frequency. If feed backed pulses are not detected for 12 seconds, fan motor becomes abnormal and indoor operation indicator lamp flashes to show abnormality.

Controlled voltage is applied to AC fan motor.

The microprocessor outputs pulse every 100Hz (every 50Hz in half wave). (Fan speed varies according to the time span between a Zero-cross point on the commercial wave and a pulse out put point.)

The microprocessor drives SSR on relay p.c. board.

The microprocessor detects rotational frequency of AC fan motor, using Hall element in AC fan motor.

microprocessor

controller board

220~240V AC

SSR output

rotational frequency

every 100Hz pulse output

AC motor

actuator (SSR)

AC motor

rotational frequency sensor part

output input

Page 38

1. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room. In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be modified according to the indoor unit number.

How to modify the remote controller P.C. board

The P.C. board has the print “J1” and “J2”. Jumper wires are mounted to each “J1” and “J2”.Cut “J1” and “J2” according to the number of indoor unit as shown in Table 1. After modification, push the RESET. button near the MIN-button on the remote controller.

NOTE : At power supply failure or installation, indoor unit deletes the memory about remote controller. When

the power supply is turned on and indoor unit receives the first signals from the remote controller, the remote controller number is designated as the indoor unit number. Therefore at and after the second time indoor unit accepts the remote controller of the initial setting number. At setting - error, turn the power supply off to cancel the individual operation and then turn the power supply on to restart the setting.

Remove batteries before modification. The board has a print as shown below;

NOTE : Fore remodeling, take out the batteries at first.

After finish remodeling, put back the batteries then push the RESET-button.

No.1 unit No.2 unit No.3 unit No.4 unit

1 unit operation No modification

2 unit operation

Same as at left

Cut J1

3 unit operation Same as at left Same as at left

Cut J2

4 unit operation

Same as at left Same as at left Same as at left

Cut both J1 and J2

Table1.

2. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPS on and the electronic control P.C. board. The time will be shortened as follows. 3-minute delay : 3-minute ➔ 3-second. AUTO START : 1 hour ➔ 1-minutes AUTO STOP : 1 hour ➔ 1-minutes

Short the connector during the timer mode.

}

10 SERVICE FUNCTIONS

Page 39

3. AUTO RESTART FUNCTION

When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C.board. The “AUTO RESTART FUNCTION” sets to work the moment the power has restored after power failure, then, the unit will restart automatically. If the unit is operated in “I FEEL CONTROL.” mode before power failure, the operation is not memorized. In “I FEEL CONTROL.” mode, the operation is decided by the initial room temperature at (re)start.

How to set “AUTO RESTART FUNCTION”

1Turn off the main power for the unit. 2Remove the indoor electronic control P.C. board and the display P.C.board.(See page 57,58.) 3Pull the indoor electronic control P.C. board forward and cut the RESISTOR JR07 on it.

C11

52C

CN201

CN112

CN121SW

CN111

IC101

CN211

CN151

JR07

Operation

1If the main power (220-240V AC) has been cut, the operation settings remain. 2After the power is restored, the unit restarts automatically according to the memory.(However, it takes at least 3 minutes

for the compressor to start running.)

NOTE:

•The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote

controller.

•If the main power is turned off or a power failure occurs while AUTO START/STOP timer is active, the timer setting is

cancelled.

•If the unit has been off with the remote controller before power failure, the auto restart function does not work as the

power button of the remote controller is off.

•To prevent breaker off due to the rush of starting current, systematize other home appliances not to turn on at the same

time.

•When some air conditioners are connected to the same supply system, if they are operated before power failure, the

starting current of all the compressors may flow simultaneously at restart. Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current by adding to the system that allows the units to start one by one.

Page 40

TROUBLESHOOTING11

11-1 Cautions on troubleshooting

1. Before troubleshooting, check the followings:

1) Check the power supply voltage.

2) Check the indoor/outdoor connecting wire for mis-wiring.

2. Take care the followings during servicing.

1) Be sure to unplug the power cord before removing the front panel, the cabinet, the top panel, and the P.C. boards.

2) When removing the P.C. board, hold the edge of the board with care NOT to apply stress on the components.

3) When connecting or disconnecting the connectors, hold the housing of the connector, DO NOT pull the lead wires.

3. Troubleshooting procedure

1) First, check if the POWER LAMP on the indoor unit is flashing to indicate an abnormality. To make sure, check the abnormality indication for 2 or 3 times before starting service work.

2) If the P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the components for bursting and discoloration.

3) When troubleshooting, refer to the flow chart and the check table on page 38.

4. How to replace batteries

Weak batteries may cause the remote controller malfunction. In this case, the remote controller can not be repaired only by the battery replacement. To operate the remote controller normally, replace the batteries in the following order. This remote controller has the reset button. After refilling new batteries, press the reset button with tip end of ball point pen or the like, and then use the remote controller.

Housing point

RESET BUTTON

Lead wiring

3. Caution for the outdoor unit repair service

1) Do not load on the P.C.board cover.

2) Since every P.C.board circuit links directly with power supply 220~240V AC, do not short the P.C.board and metal section on servicing. Also if touch the parts on the P.C.board, it may cause an electric shock.

3) When closing the P.C.board cover, prevent a foreign matter or dust from coming inside the P.C.board.

Be careful at voltage measurement

Cover

Relay P.C. board

Electronic control P.C. board

MSZ-A09RV MSZ-A12RV -

Page 41

11-2 Troubleshooting procedure

The following procedure facilitates identifying defective points. The abnormalities in

can be located in the Troubleshooting check table on page 42~43.

Indoor unit dose not respond to remote controller.

Refer to G ‘Check of indoor electronic control P.C. board’ on page 49.

Power monitor lamp flashes.

Indoor unit does not respond to remote controller. In addition, operation Power monitor lamp dose not light up, with emergency operation switch ON.

Indoor fan motor dose not run.

Refer to F ‘Check of indoor fan motor’ on

page 49.

Cause:indoor/outdoor unit

Mis-wiring

Serial signal error

Cause: in Indoor unit

Indoor coil thermistor abnormality

Room temperature thermistor abnormality

Auxiliary indoor coil thermistor abnormality

Cause: in outdoor unit

Outdoor power system abnormality

Outdoor unit temperature thermistor abnormality

·Outdoor converter power system

7 flashes

2.5 seconds OFF

Cause: in outdoor unit

Outdoor control system error

wIn case of serial signal

error, the mis-wiring indication will appear by turning the power off and then turning it back on.

5 flashes

2.5 seconds OFF 6 flashes

2.5 seconds OFF 12 flashes

2.5seconds OFF

Operation start

1 flash

2.5 seconds or

0.5 seconds OFF

Refer H ‘Check of indoor electronic P.C. board’ on page 50.

2 flashes

2.5 seconds OFF

Refer to ‘Checking serial signal error’ on page 44.

Check indoor/outdoor Mis-wiring on page 44.

Indoor coil thermistor Room temperature thermistor Auxiliary indoor coil thermistor

Refer to I ‘Check of outdoor thermistors’ on

Inverter/Compressor

Refer to A ~ E

‘Compressor’ on page 47 and 48.

Refer to A ~ E ‘Transistior module’ on page 47 and 48.

Refer to L 'Check of power supply' on page 52.

Outdoor electronic control P.C. board.

Refer to J ‘Check

of Reversing valve coil’ on page 51.

Refer to K ‘Check of outdoor fan motor’ on page 51.

Outdoor electronic control P.C. board.

3 flashes

2.5 seconds OFF

Refer to N ‘Check of electronic control P.C. board in the outdoor unit’ on page

Refer to P ‘Check of linear expansion valve (LEV)’ on page 53.

Page 42

1. Troubleshooting check table (Indoor unit troubleshooting check table) MSZ-A09RV MSZ-A12RV -

POWER

flash

· Flashing of the operation indicator lamp (on the left-hand side) indicates possible abnormalities.

· The operation indicator lamp (on the left-hand side) is lighting during normal operation.

No.

Symptom

Operation indicator lamp

Abnormal point Detection method Checkpoint

Outdoor unit does not operate

repeated flashes every 0.5 seconds

One flash

2.5 seconds OFF

2 flashes

2.5 seconds OFF

5 flashes

2.5 seconds OFF

Mis-Wiring

Serial signal

Outdoor power system

6 flashes

2.5 seconds OFF

Outdoor thermistors

7 flashes

2.5 seconds OFF

Outdoor control system

Indoor coil thermistor Auxiliary indoor coil thermistor Room temperature thermistor

When indoor electronic control p.c. board does not receive serial signals for 4 to 5 seconds with OPERATION/STOP button of remote controller ON and 52C relay ON for the first time, NOTE: In case of serial signal error, mis-wiring

indication will appear by turning power off and then turning it back on.

When indoor electronic control p.c. board does not receive serial signals from outdoor unit for 4 to 5 seconds,

Indoor electronic control p.c. board constantly detects resistance every 8 seconds. When thermistor shorts or opens.

When compressor has stopped due to over current protection or start-up failure protection 3 times in a row within 1 min. after start-up.

<Thermistor short> Thermistors are abnormal when they short after compressor start-up. <Thermistor open> Thermistors are abnormal when they open after compressor start-up. However, discharge temperature thermistor is abnormal when open circuit is detected more than 10 min. after compressor start-up.

When nonvolatile memory data cannot be read properly on outdoor control P.C. board, outdoor unit stops and restarts 3 minutes later,

· Shortage of refrigerant

· Outdoor electronic control p.c. board

Refer to I "Check

of outdoor thermistors" on page 50.

Refer to the characteristics of indoor coil thermistor, auxiliary indoor coil thermistor, and room temperature. thermistor on page

Refer to "How to check inverter/compressor" on page 47.

Replace outdoor electronic control P.C. board.

Refer to 'Checking serial signal error' on page 44.

3 flashes

2.5 seconds OFF

Indoor fan motor.

When rotational frequency feedback signal is not emit during 12-second indoor fan operation.

Refer to F "Check of indoor fan motor" on page 49.

12 flashes

2.5 seconds OFF

Converter power system

When the converter protective suspension within 1 minute after start-up of the converter is operated 5 times successively. Also bus-bar voltage malfunction (140V or less or 400V or more) within 1 minute after start-up of the converter has happened 5 times successively.

Refer to I "Check of inverter P.C.board" on page 50.

wWhen the indoor unit has started operation and the above detection method has detected an abnormality (the first detection

after the power ON), the electronic control P.C. board turns OFF the 52C and the indoor fan motor with the operation indicator lamp lighting.

When the 52C and the indoor fan motor are turned ON again 3 minutes later and the same abnormality is detected (a

second detection of the above abnormality after the power ON), the control P.C. board turns OFF the 52C and the indoor fan motor with the operation indicator lamp flashing.

However, the first detection is cleared in case the power is turned OFF after the first detection.

Page 43

(Outdoor LED indication table)

MUZ-A09RV MUZ-A12RV -

NOTE 1. The location of LED is illustrated at the right figure.

2. LED lights up during normal operation.

Abnormal point

When the converter protective suspension within 1 minute after start-up of the converter is operated 5 times successively. Also bus-bat voltage malfunction (140V or less or 400V or more) within 1 minute after- start-up of the converter has happened 5 times successively.

When compressor has stopped by over current protection or start-up failure protection within 1 min. after compressor startup 3 times in a row, compressor stops and then restarts 3 min. later.

When discharge temperature thermistor or fin temperature thermistor shorts or opens during compressor running, compressor stops and restarts 3 min. later.

When nonvolatile memory date cannot be read properly, compressor stops and restarts 3 min. later.

When 19A current flows into power transistor, compressor stops and restarts 3 min. later,

When discharge temperature thermistor exceeds 116:, compressor stops and restarts 3 min. later. (Compressor restarts when discharge temperature thermistor reads 100: or below.)

When temperature at heat sink exceeds 88: or outdoor electronic control P.C. board exceeds 67: , compressor stops and restarts 3 min. later.

When indoor coil thermistor exceeds 75:, compressor stops and restarts 3 min. later.

When current from power outlet exceeds 10. A, compressor frequency lowers.

When indoor coil thermistor exceeds 55: in HEAT mode, compressor frequency lowers.

When indoor coil thermistor reads 8: or below in COOL mode, compressor frequency lowers.

When discharge temperature thermistor exceeds 111:, compressor frequency lowers.

When defrost thermistor short or open. w In this case, compressor continues running.

When the converter suspends for protection

•Response abnormal suspension

•Bus-bar voltage abnormal suspension

•Converter over current/over voltage protective suspension

•Converter current detection abnormal suspension

•Converter zero cross abnormal suspension

When discharge temperature has been 50: or below for 20 min.

No.

Symptom

LED indication

Detection method Checkpoint

Outdoor unit does not operate

'Outdoor unit stops and restarts 3 min. later' is repeated

Outdoor unit operates (at low frequency)

Outdoor unit operates

One flash every

2.5 seconds

NOTE: For abnormality location, refer to 'Indoor troubleshooting check table' on page 34.

2 flashes

2.5 seconds OFF 3 flashes

2.5 seconds OFF

4 flashes

2.5 seconds OFF

5 flashes

2.5 seconds OFF

one flash 2-5 seconds OFF

3 flash 2-5 seconds OFF

4 flashes 2-5 seconds OFF

5 flashes 2-5 seconds OFF

8 flashes 2-5 seconds OFF

7 flashes 2-5 seconds OFF

Converter power system

Outdoor power system

Outdoor thermistors

Outdoor control system

Over current protection

Discharge temperature overheat protection

Fin temperature thermistor overheat protection

High pressure protection

Frequency drop by current protection

Frequency drop by high pressure protection

Frequency drop by defrosting in COOL mode

Frequency drop by, discharge temperature protection.

Outdoor thermistors. Defrost thermistor.

Converter protection.

low discharge temperature protection

· Refer to N 'Check of electronic control P.C.board' on page 52.

· Refer to 'Checking inverter/ compressor on page 47.

· Refer to I 'Check of outdoor thermistors' on page 50.

Refer to A-E in 'How to check inverter/ compressor' on page 47~ 48.

Replace outdoor electronic control P.C. board.

· Check refrigerant circuit and refrigerant amount.

· Refer to I'Check of outdoor thermistor' on page 50.

· Check around outdoor unit.

· Check outdoor unit air passage.

· Check refrigerant circuit and refrigerant amount.

· Check stop valve.

The unit is normal, but check the following.

· Check if indoor filters are clogged

· Check if refrigerant is short.

· Check if indoor/outdoor unit air outlets are short cycled.

Refer to I 'Check of outdoor thermistors' on page 50.

· Refer to N 'Check of electronic

control P.C.board' on page 52.

· Refer to P 'Check of LEV' on page 53.

· Check refrigerant circuit and refrigerant amount.

When switching from forced drive to normal drive (synchronised operation by a position detectable signal) failed 5 times successively at compressor start-up Restart-up after suspension when miss start-up or abnormal position detecting within 10 seconds after start-up.

7 flashes

2.5 seconds OFF

Mis-start up protection

When the position detectable signal is not input during normal starting up (synchronised operation by a position detectable signal) after 10 seconds of compressor operation

8 flashes

2.5 seconds OFF

Position detection protection

Check and replace as follows. 1 Check the compressor connecting lead wire between connector and transistor module. 2 Check inverter P.C.board (Position detecting circuit transistor module, Micro computer, etc) 3 Compressor replacement Refer to A~E Inverter Compressor simple check method (page 47~48)

When disconnecting the compressor connector, going to inverter check mode.

9 flashes 2-5 seconds OFF

Inverter check mode

· Refer to A~E Inverter Compressor simple check method (Page 47~48)

LED

IPM

PFC

flash

Refer to I 'Check of outdoor thermistors' on page 50.

Page 44

2. Checking mis-wiring and serial signal error. MSZ-A09RV MSZ-A12RV -

Outdoor unit does not operate. When the operation indicator lamp (on the left-hand side) flashes on and off continuously or only once.

1. Turn OFF power supply.

2. Turn ON power supply.

3. Press the EMERGENCY OPERATION switch.

Is the self-check function of indoor unit indicated when relay 52C turns ON 3min. later? wShort circuit of JPS (one-hour short circuit jumber cable) and JPG (GND

resistance) enables self-check function to be indicated within 3 min.

Is there indoor-outdoor mis-wiring, poor contact, or disconnection?

Is there approx. 220-240V AC between outdoor terminal block 2 and 1 ?

Is mis-wiring or serial signal error indicated when relay 52C turns ON 3 min. later?

Is there 370V DC between both ends of smoothing capacitor(C62) on the electronic control P.C. board?

Replace in-out connecting wire.

Does Power monitor lamp (on the right-hand side) flash on and off when OPERATE/STOP button on remote controller is pressed?

w1 If there is any error in

serial signal system, the mis-wiring indication will appear by turning the power off and then turning it back

w2 Mis-wiring may damage the electronic

control P.C. board during the operation in the left. Be sure to confirm the wiring is correct before the operation starts.

w3 Replace indoor

electronic control P.C. board.

w3 Be sure to release the

failure-mode recall function after checking.

w The serial signal indication on the Power

monitor lamp (right side) facilitates checking abnormality, based on the failure-mode

Mis-wiring indication

Yes

Correct wiring

Replace outdoor electronic control P.C. board.

· Main circuit

· Reactor

· Noise filter P.C. board

· Connection of connector

Yes

Turn off power supply and confirm that indoor-outdoor wiring is correct. Short-circuit indoor terminal block N and 3. While pressing OPERATE-STOP button on remote controller, press RESET button. (The above procedure allows Power monitor lamp to indicate the failure-mode) w2

Open-circuit indoor terminal block N and 3, Check if there is amplitude of 5 to 10VDC between outdoor terminal block N and 3 (for confirmation of serial signal) and if there is 220-240V AC between 2 and N

1. Unplug the power cord.

2. Disconnect the connector between compressor and transistor module.

3.Plug the power cord.

4. Press EMERGENCY OPERATION switch.

2.5 seconds OFFON ON

Serial signal error indication

defective

Yes

(light up or OFF)

· Turn off invertercontrolled lighting equipment.

· Plug the power cord.

· Press EMERGENCY OPERATION switch.

· Keep the unit away from fluorescent light.

· Attach a filter to lightintercepting part.

Green Sign

flash

22 24

Page 45

Checking method and criterionPart name

3. Trouble shooting procedure of main parts (Simple check method of main parts)

MSZ-A09RV - MUZ-A09RV MSZ-A12RV - MUZ-A12RV -

E1E1

Room temperature

Indoor coil thermistor (main-auxiliary)

Defrost thermistor

Discharge temprature thermistor

Fin temperature thermistor

Compressor

Indoor fan motor

Disconnect the connector and measure the resistance with a tester. (Part temperature : 10:~30:)

normal abnormal

8k"~20K" Open or short circuit

Disconnect the connector and measure the resistance with a tester. (Part temperature : -10:~40:)

normal abnormal

5k"~55K" Open or short circuit

Disconnect the connector and measure the resistance with a tester. Before measurement, hold the termistor with your hands to warm it up. (Part temperature : 20:~40:)

normal abnormal

100k"~250K" Open or short circuit

Disconnect the connector and measure the resistance with a tester. (Part temperature : -10:~80:)

normal abnormal

5k"~30K" Open or short circuit

Disconnect the connector and measure the resistance between the terminals with a tester. (Winding temperature : -10:~40:)

Measure the resistance between the terminals with a tester. (Winding temperature : 10:~30:)

termina

(CN211)

normaL abnormal

WHT-BLK 280"~304"

BLK-RED 311"~338"

Open or short circuit

WHT

Compressor motor

RED BLK

WHT RED

BLK

normal abnormal

0.82"~1.01" Open or short circuit

Page 46

Checking method and criterionPart name

Outdoor fan motor

Vertical vane motor Horizontal vane motor

Reversing valve

Linear expansion valve (LEV)

Measure the resistance between the terminals with a tester. (Winding temperature : -10:~40:)

Measure the resistance between the RED terminal and the other ones. (Winding temperature : 20:~30:)

normal abnormal

Measure the resistance between the terminals with a tester. (Part temperature : -10:~40:)

Measure the resistance with a tester. (Part temperature : -10:~40:)

termina

(CN724)

normall abnormal

WHT-RED RED-ORN YLW-BRN

42’~52' Open or short circuit

BRN-BLU

terminal normal abnormal

WHT-BLK 173.7'~212.6'

BLK-RED 277.8'~339.9' Open or short circuit YLW-BLK 11.4'~14.1'

approx. 300' in each phase

open or short circuit.

normal abnormal

882'~1079'

open or short circuit.

WHT

RED

BLK

YLW

ORN

LEV

WHT6

RED1

ORG4

YLW5

BRN2

BLU3

ORN

BLUYLW

RED

PNK

ROTOR

Page 47

(How to check inverter/compressor)

Start

Check voltage between terminals.

Are voltages

balanced?

Check compressor.

Disconnect the connector between compressor and IPM.

Check resistance of IPM.

See C 'Check of compressor.'

See A 'Check of open phase.'

See B 'Check of transistor module.'

Is resistance infinite?

Yes

Outdoor electronic control P.C. board is defective

IPM is defective.

Replace outdoor electronic control P.C. board and IPM.

No (0~several

Check of open phase

●Be sure to use the analog voltmeter for measurement

●With the connector between compressor and transistor module

disconnected, activate the inverter and measure the balance of voltage between terminals.

Output voltage : 120V

<< Operation method>> Start heating opration by pressing the Emergency operation switch on the indoor unit. (test-run mode) <<Measurement point>>

at 3 points BLK-WHT BLK-RED WHT-RED

NOTE Measure AC voltage, at 3 points more than one minute ofter

the outdoor fan motor starts running.

Check of IPM

●Disconnect the connector between compressor and IPM, and measure resistance between terminals on the IPM.

<<Measurement point>> at 6 points BLK-WHT, WHT-BLK BLK-RED, RED-BLK WHT-RED, RED-WHT at 6 points <<Judgment>> Infinite ["]···········normal 0~dozens of ······abnormal (short)

w Measure resistance between the lead wires at 3 points

ohmmeter indication

normal (infinite)

abnormal (0~dozens of ")

2.5 seconds OFF

9 flashes

LED

IPM

PFC

Note1.Output voltage changes depending power supply

voltage. (Max. i10%)

2. Measure by analogue tester.

3. During the measurement, LED in the outdoor electronic control P.C. board flashes 9 times.

flash

Yes

Page 48

Check of compressor winding

Check of compressor

● Disconnect the connector between compressor and IPM, and measure resistance between the compressor terminals.

<<Measurement point>>

at 3 points BLK-WHT BLK-RED WHT-RED

<<Judgment>>

0.82 to 1.01" at -10: to 40: of part temperature. 0["] ···············abnormal [short] Infinite["] ·······abnormal [open] NOTE 1.Be sure to zero the ohmmeter before measurement.

2.Winding resistance for each phase is 0.45" at 20:.

Check of compressor operation time

●Connect the compressor and activate the inverter. Then measure the time until the inverter stops due to overcurrent.

<<Operation method>>

Start heating or cooling operation by pressing the Emergency operation switch on the indoor unit. (Test-run mode)

<<Measurement>> Measure the time from the start of outdoor fan running till the

stop of the inverter due to overcurrent.

<<Judgment>>

For reference 0~10 seconds·····················abnormal (short) 10~60 seconds···················abnormal (compressor lock-out) 60 seconds~5 minutes·······abnormal (refrigerant circuit defect) more than 5 minutes···········normal

w Measure resistace between the lead wires at 3 points.

Outdoor fan starts Abnormal (Compressor short circuit or layer short)

Abnormal (Compressor lock-out)

Abnormal (refrigerant circuit defect, etc.)

Normal

0 sec.

10 sec.

60 sec.

5 min.

normal (1~several ")

abnormal (0" ····· short)

abnormal (infinite····· open)

Ohmmeter indication

Check resistance of compressor.

Check compressor operation time

Normal

Compressor short or open Replace compressor

See D 'Check of compressor winding'

Is resistance

1~several " at -10:

~ 40: of winding

temperature?

Does compressor run

continuously?

See E ' Check of compressor operation time,'

Compressor layer short , lock-out or refrigerant circuit defective.

Replace compressor. Check refrigerant circuit.

Yes

WHT

Compressor motor

RED BLK

Yes

Page 49

●Re-install the unit away from the lights.

●Attach a filter to lightintercepting part.

Check of remote controller and indoor electronic control P.C. board.

Check of indoor fan motor.

Turn off power supply and check connector CN 211 visually.

Are lead wires dis connected?

Yes

Normal

Disconnect lead wires from CN 211 on indoor electronic control P.C. board. Measure resistance between lead wire 1 and 3 and then 2 and 3.

Yes

(not clear)

Yes

(How to check main parts)

Indoor fan does not operate.

Indoor unit operates by pressing the Emergency operation switch, but does not operate with the remote controller.

Is soldered point abnormal?

Lead wires are not properly connectes

Is LCD display on remote controller visible?

Does the unit operate with remote controller?

Is noise heard from the radio?

Is voltage approx. +4V DC?

Are there any fluorescent lights of inverter or radio start type within 1 meter?

Is resistance 0" (short) or " (open) ?

Connector is not properly soldered.

Replace batteries and then press RESET button. See page 32.

Receiver defect

Indoor electronic control P.C. board defect.

Indoor fan motor defect

Indoor electronic control P.C. board defect.

CN211

3 2 1

fan

motor

indoor electronic control P.C. board

Check the model name of remote controller.

Remove batteries and set them back. Check again if indoor unit operates with remote controller.

Tune a radio in to AM and press OPERATE/STOP button on remote controller.

Remote controller defect

Turn on power to indoor unit, and measure voltage between connector LD 101 2 (+) and JPG(-1) on indoor control P.C. board when OPERATE/STOP button on remote controller is pressed.

Yes

No (+5V DC)

Model name and part No. are witten here

back side of remote controller

()

LD101 1 2 3 4 5

1 2 3 4 5

remote controller

Indoor electronic control P.C. board

light-interception ihdication board

Page 50

Check of outdoor thermistors

Check of indoor electronic P.C. board

Measure resistance between. CN 6411 and 2

Measure resistance between. CN 6421 and 2

Yes

The unit does not operate with the remote controller. The operation indicator lamp does not light up either, with the Emergency operation switch ON.

The thermistors in the outdoor unit are abnormal.

Thermistor is defective.

Disconnecting connector or inferior connecting

indoor electronic control P.C. board

varistor (NR11)

Indoor electronic control P.C. board

fuse (F11)

1 3

N 2 3

thermal fuse connector

●Disconnect the connectors CN 641 and CN 642 from the outdoor electronic control P.C. board. (Check the characteristics of each thermistor.)

1 Connect CN 641 and

CN 642.

2 Disconnect the

connector between compressor and IPM.

(Defrost thermistor)



Measure resistance between. CN 6413 and 4

Turn on power to indoor unit and press Emergency operation switch

Discharge temperature thermistor

()

Fin temperature thermistor

()

As per the characteristics on page 55?

Does the unit operate 10 minutes or more?

Yes

Thermal

block

Is LED in the electronic control P.C. board flashing 5 minutes?

Inferior

electronic control

P.C. board

Yes

Check both “parts side” and “pattern side” of indoor electronic control P.C. board visually.

Replace the fuse.

Is fuse(F11) blown?

Be sure to check both fuse and varistor in any case.

Replace the fan motor .

Trouble of the indoor electronic control P.C. board.

Is winding resistance of fan motor 0 "?

Is winding resistance of vane motor 0 "?

Yes

Replace the vane motor. .

Yes

Is varistor(NR11) burnt?

Replace the varistor.

Yes

Turn OFF the power supply. Remove indoor fan motor connector CN211 and vane motor connector CN151 from the ELECTRONIC CONTROL P.C. board and turn on the power supply.

The unit doesn’t operate with the remote controller. Also, the Power monitor lamp doesn’t light up by pressing the EMERGENCY OPERATION switch.

Yes

Be sure to check both resistance.

Page 51

Check of outdoor fan motor

Check of reversing valve coil

Disconnect connector between compressor and IPM.

Turn on power to indoor unit, and press Emergency operation switch (Heat).

Heating operation works when cooling is expected.

0utdoor fan motor does not work

· Press Emergency operation switch again to check if Relay 52C works.

· Mis-wiring of in-out connection.

· Indoor electronic control P.C. board defect.

· Outdoor fan motor lead wires defect

· Poor contact of connector CN 771

· Outdoor fan motor defect

Reversing valve coil defect

Relay P.C. board defect

• If the connector CN 913 is not connected or the reversing valve coil is open, the voltage occurs between the terminals even when the control is OFF.

Is there voltage of 220-240V AC between CN 913 1 and 2 on relay P.C. board 3 min. after power?

3 minutes after poweron, is there voltage of 220-240V AC between outdoor terminal block 2 and N?

Is there voltage of approx. 220-240V AC either between 2 and 3 or between 2 and 4 or between 2 and 5 at CN 771?

In-out Connecting Wire

outdoor terminal block TB1

N 2 3

Disconnect connector CN 771 on relay P.C. board. Disconnect connector between compressor and IPM.

Turn power on to indoor unit and press Emergency operation switch.

3 minites after power-on, measure voltage between terminals of CN 771.

CN913

Relay P.C. P.C. board

Reversing valve

AC 220-240V



Yes

CN771

Relay P.C. board

fan

motor

In-out Connecting Wire

outdoor terminal block TB1

N 2 3

Cooling operation works when heating is expected.

•First, measure resistance of the reversing valve coil to check if it is defective or not.

• If the connector CN 913 is not connected or the reversing valve coil is open, the voltage occurs between the terminals even when the control is OFF.

Relay P.C. board defect

Is there voltage of 0V between CN 912 1 (+)and 2 (-) on relay P.C. board.

Approx. 1V DC voltage occurs

Yes

Electrinic control P.C.board defect

Disconnect connector between compressor and IPM.

Turn on power to indoor unit, and press Emergency operation switch (Cool).

Is there voltage of 220-240V AC between CN 913 1 and 2 on relay P.C. board 3 min. after power?

Yes

Relay P.C. board defect

Is there voltage of 1V DC between CN 912 1 (+)and 2 (-) on relay P.C. board.

No The voltage is 0V

Yes

Electrinic control P.C.board defect

· Reversing valve coil lead wires defect

· Poor contact of connector

· Reversing valve defect

Page 52

Check of thermal fuse

Check of power supply.

Disconnect connector between compressor and IPM. Turn power on to indoor unit and press Emergency operation switch. 3 minutes after power-on, is there voltage of approx. 220-240V AC between outdoor terminal block 2and N?

Unplug the power cord. Replace thermal fuse.

Inverter does not work.

· Press Emergency operation switch again to check if Relay 52C works.

· Mis-wiring of in-out connection or disconnection.

· Indoor electronic control P.C. board defect.

Repair according to the LED indication.

Outdoor electronic control P.C. board defect.

Normal

Is there approx. 370V DC between both ends of smoothing capacitor (C62) on electronic control P.C. board?

Dose LED light up or flash on outdoor electronic control P.C. board.?

Is resistance ° between connector CN 201 1 on indoor electronic control P.C. board and terminal block N?

Yes

Flash

(How to check power supply and others)

Yes

CN201

Indoor electronic control P.C. board.

Check the applicable parts by LED indication

Check of electronic control P.C. board

Not become cooling/heating. (Not increase speed of compressor rotation)

Replace electronic control P.C. board

Does the outdoor unit fan operate nomally?

Check the connecting CN911 in the relay P.C. board and CN726 in the electronic control P.C. board.

Turn on power supply to indoor unit, and press Emergency operation switch.

Check LED indication in the electronic control P.C. board.

Check the outdoor fan motor (refer to page 46)

Yes

Except for 8 times flashing

8 times flashing

Converter protect suspension

· Main circuit

· Reactor

· Noise filter P.C. board

· Connection of connector

defective

Yes

Dose LED flash on outdoor electronic control P.C. board.?

Yes

Light up

LED

Electronic control P.C. board

C62

(+)

(-)

370V DC

Page 53

Replace LEV (coil defect)

Replace LEV

Check of linear expansion valve (LEV)

• Press RESET button, while pressing OPERATION SELECT button on remote controller. (All displays on operational display section are ON.) (Refer to right diagram.)

• With remote controller set toward the indoor unit, press OPERATE/STOP button and confirm one beep tone.

• With remote controller set toward the indoor unit, OPERATE/STOP button and confirm two beep tones.

Confirm again that LEV is operating

Replace outdoor electronic control P.C. board.

LEV operates in full-opening direction.

· Is LEV connector connected?

· Is LEV coil properly fixed to the body?

Heating/Cooling do not operate.

Normal

Do you hear LEV "click, click·······"? Do you touch LEV and feel it vibrate?

Is LEV coil resistance as per characterictics below?

Do you hear LEV "click, click·········"?

Yes

LEV is normal

Yes

LEV (CN 724) WHT(6)–RED(1) RED(1)–ORE(4) YLW(5)–BRN(2) BRN(2)–BLU(3)

resistance

39"~56"

Characteristics of LEV coil

❈After you have followed the entire flow chart of "Check of linear expansion valve (LEV)", be sure to follow the procedure below.

Replace current limiting resistor.

Check of rush current limiting circuit

Outdoor unit does not operate at all or stops immediately due to overcurrent.

NOTE : When the current limiting resistor is open, the rush current limiting relay may not be working properly. There fore confirm the limiting resistor works properly after replacing it.

Normal

Does current limiting resistor detect 10"?

No °

Yes

Heating/Cooling do not operate.

1Press EMERGENCY OPERATION switch. 2Unplug the power cord and then plug it again. 3Press RESET button on remote controller.

Page 54

TEST POINT DIAGRAM AND VOLTAGE MSZ-A09RV MSZ-A12RV Indoor electronic control P.C. board

Varistor (NR11)

Fuse 250V AC 3.15A

Room temperature thermistor (RT11)

Indoor coil thermistor (RT12)

Timer short mode point

Room temperature thermistor (RT11)

Indoor coil thermistor (RT12, 13)

10 20 30 40 50 60

Emergency operation switch

}

Power supply input 220240V AC

}

Fan motor power supply

How to set “Auto restart function” Cut the Resistor JR07.(Refer page 39.)

}

5V DC

{

12V DC

Temperature (;;)

Resistance (k

)

Indoor coil thermistor (RT13)

Page 55

-20 -10 0 10 20 30 40

100

Temperature(:)

Defrost thermistor(RT62)

Temperature(:)

Discharge temperature thermistor(RT61)

0 102030405060708090100110120

100

200

300

400

500

600

700

0 1020304050607080

100

120

140

160

180

200

Temperature(:)

Fin temperature thermistor(RT64)

Resistance(k")

MUZ-A09RV MUZ-A12RV -

Fin temperature thermistor(RT64) CN642

Outdoor electronic control P.C.board

370V DC (C62)

Defrost termination temperature change. Jumper wire (JP7).

Defrost thermistor (RT62) CN641

Discharge temperature thermistor(RT61)

LED monitor lamp

Power supply zero crossing signal 220240V AC (CN726)

Connector for indoor/outdoo r communicatio

LEV connector (CN724)

15V DC

12V DC

5V DC

220-240V AC

FRONT

BACK

Page 56

MUZ-A09RV MUZ-A12RV -

Noise filter P.C board

Outdoor fan motor 220-240V AC

R.V. coil 220-240V AC

Relay P.C board

220-240V AC

FRONT

BACK

FRONT BACK

Power supply zero crossing signal 220-240V AC (CN911)

220-240V AC

Page 57

DISASSEMBLY INSTRUCTIONS12

OPERATING PROCEDURE PHOTOS

1. Removing the front panel

(1) Remove the screws caps of the front panel.

Remove the screws.

(2) Pull the panel down to your side slightly and unhook the

catches at the top.

Photo 1

Photo 2

Screws

Front panel

12-1. MSZ-A09RV - MSZ-A12RV -

INDOOR UNIT

E1E1

(1)

(2)

1Slide the sleeve. 2Pull the terminal while

pushing the locking lever.

1Hold the sleeve, and pull out the terminal slowly.

In case of a terminal with lock mechanism, detach the terminal as shown below.

<"Terminal with lock mechanism" Detaching points>

2. Removing the electronic control P.C. board and the display P.C. board.

(1) Remove the front panel. (Refer to 1) (2) Remove the screw of the electrical cover.

Remove the electrical cover.

(3) Remove the terminal cover.

Remove the screw of the terminal block. (4) Remove the cord clamp. (5) Remove the screw of the ground wire. (6) Disconnect all the connectors and all the lead wires on the

electronic control P.C. board.

(7) Remove the electronic control P.C. board and the display

P.C. board.

Terminal block cover

Terminal block cover screw

Room temperature thermistor connector

Cord clamp

Indoor electronic control P.C.board

Ground

Vane motor connector

Fan motor connector

Page 58

OPERATING PROCEDURE PHOTOS

3. Removing the electrical box

(1) Remove the front panel. (Refer to 1) (2) Remove the electrical cover. (3) Disconnect the connector of the indoor coil thermistor. (4) Disconnect the motor connector (CN211) and the vane

motor connector (CN151) on the electronic control P.C. board.

(5) Remove the screw fixing the electrical box, remove the

electrical box.

4. Removing the vane motor

(1) Remove the front panel. (2) Remove the screws (both upper and lower) of the vane

motor, disconnect the connector.

(3) Remove the vane motor.

Photo 4

Photo 5

Drain hose

Vane motor

Fan motor screws

Indoor coil thermistor

5. Removing the line flow fan and the indoor fan motor

(1) Remove the front panel. (Refer to 1) (2) Remove the electrical box. (3) Pull out the drain hose from the nozzle assembly, remove

the nozzle assembly. (4) Remove the screws fixing the fan motor. (5) Remove the screws fixing the left side of the heat

exchanger. (6) Lifting the left side of the heat exchanger. (7) Remove the hexagon socket set screws. (8) Remove the fan motor, and remove the line flow fan.

Electrical box screw

Photo 3

The screws fixing the left side of the heat exchanger

Vane motor screws

Page 59

OPERATING PROCEDURE

PHOTOS

1. Removing the cabinet

(1) Remove the screws fixing the service panel. (2) Pull down the service panel and remove it from the cabinet. (3) Remove the screws fixing the cabinet.

2. Removing the inverter assembly

(1) Remove the service panel and the cabinet. (2) Disconnect the connectors (CN641),(CN642),(CN601) and

(CN724) on the control P.C. board.

(3) Remove the connectors (CN771) and (CN913) on the relay

P.C. board. (4) Remove the lead wires from the reactor(L641) on the TB2. (5) Remove the screws fixing the relay panel.

5. Removing the noise filter p.c. board

(1) Remove the service panel and the cabinet.(refer to 1) (2) Remove the control P.C. board and relay P.C. board. (3) Remove all the connectors and the terminals on noise filter

P.C. board. (4) Remove the ground wire screwed down on the relay panel. (5) Remove the noise filter P.C. board.

4. Removing the relay p.c. board

(1) Remove the service panel and the cabinet.(refer to 1) (2) Remove all the connectors and the terminals on relay P.C.

board.

(3)Remove the relay P.C. board.

3. Removing the control p.c. board

(1) Remove the service panel and the cabinet.(refer to 1) (2) Remove the cover. (3) Remove all the connectors and the terminals on the control

P.C. board. (4) Remove the connector from the compressor. (5) Remove the screws fixing the PFC and IPM. (6) Remove the control P.C. board from the heat sink.

Screw

Hook

Screw

Connector

12-2 MUZ-A09RV - MUZ-A12RV -

OUTDOOR UNIT

E1E1

Photo 1

Photo 2

Photo 3

Photo 4

Noise filter P.C. board

Cover screw

Control P.C. board

Relay P.C. board

Screw

Heat sink

Page 60

OPERATING PROCEDURE

PHOTOS

7. Removing the compressor

(1) Remove the cabinet. (Refer to 1) (2) Remove the soundproof felt. (3) Remove the terminal cover on the compressor (4) Remove the electrical assembly. (Refer to 2) (5) Release gas from the refrigerant circuit. (6) Disconnect the welded part of the discharge pipe (7) Disconnect the welded part of the suction pipe. (8) Remove nuts fixing the compressor. (9) Remove the compressor.

6. Removing the outdoor fan motor

(1) Remove the cabinet. (Refer to 1) (2) Unconnect the connector remove the clamp of fan motor

lead wire.

(3) Remove the propeller nut and remove the propeller. (4) Remove screws fixing the fan motor.

Propeller fan

Propeller nut

Set screws for outdoor fan motor

Lead clamps

Welded section

Photo 5

Compressor nut

Page 61

PARTS LIST13

MSZ-A09RV - (WH) MSZ-A12RV - (WH) 13-1. INDOOR UNIT STRUCTURAL PARTS

E02 409 000 E02 409 010 E02 410 100 E02 411 234 E02 408 970 E02 409 067 E02 408 142 E02 448 020 E02 409 975 E02 409 976

FRONT PANEL (WH) GRILLE (WH) AIR FILTER BOX (WH) INSTALLATION PLATE SCREW CAP (WH) CATCH DECORATION COVER (WH) CORNER BOX RIGHT (WH) CORNER BOX LEFT (WH) AIR CLEANING FILTER DEODORIZING FILTER

Symbol

in Wiring

Diagram

Q'ty/unit

2PCS/SET 3PCS/SET

See page 65. (MAC-1300FT) See page 65. (MAC-1800DF)

RemarksPart No.

NO.

Part Name

1 1 2 1 1 2 3 1 1 1 1 1

MSZ-A09RV-

(WH)

1 2 3 4 5 6 7 8 9

(WH)

1 1 2 1 1 2 3 1 1 1 1 1

MSZ-A12RV-

13-2. INDOOR UNIT HEAT EXCHANGER

CATCH

SCREW CAP

E02 448 620 E02 151 667 E02 151 666

INDOOR HEAT EXCHANGER UNION (LIQUID) UNION (GAS)

{6.35 {9.52

1 1 1

11 12 13

13-2. INDOOR UNIT HEAT EXCHANGER

13-1. INDOOR UNIT STRUCTURAL PARTS

11 12

Page 62

E02 448 235 E02 409 040 E02 409 041 E02 408 702 E02 001 504 E02 408 303 E02 448 303 E02 151 300 E02 151 505 E02 408 302 E02 408 509 E02 408 308 E02 448 307 E02 448 375 E02 448 452 E02 449 452 E02 408 329 E02 151 468 E02 408 034 E02 448 034 E02 408 381 E02 127 382 E02 336 385 E02 424 395

1 2 3 4 5 6 7 8

9 10 11 12 13 14

16 17 18 19 20 21 22 23

NOZZLE (WH) VANE UPPER (WH) VANE LOWER (WH) DRAIN HOSE SLEEVE BEARING VANE MOTOR (HORIZONTAL) VANE MOTOR (VERTICAL) INDOOR FAN MOTOR FAN MOTOR RUBBER MOUNT LINE FLOW FAN BEARING MOUNT ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR TERMINAL BLOCK ELECTRIC CONTROL P.C.BOARD ELECTRIC CONTROL P.C.BOARD GREEN SIGN P.C.BOARD RECEIVER P.C.BOARD VANE CLANK SET VANE MOTOR SUPPROT SET THERMAL FUSE FUSE VARISTOR POWER SUPPLY CORD

Symbol

in Wiring

Diagram

Q'ty/unit

UP & DOWN RIGHT & LEFT RC4V19 2PES/SET

3P AUTO RESTART AUTO RESTART

UP & DOWN RIGHT & LEFT 93;

3.15A

RemarksPart No.

NO.

Part Name

MV1 MV2

RT11

RT12, 13

F12 F11

NR11

1 1 1 1 1 1 1 1 2 1 1 1 1 1 1

1 1 1 1 1 1 1 1

MSZ-A09RV-

(WH)

1 1 1 1 1 1 1 1 2 1 1 1 1 1

1 1 1 1 1 1 1 1 1

MSZ-A12RV-

(WH)

Part number that is circled is not shown in the illustration.

MSZ-A09RV - (WH) MSZ-A12RV - (WH)

13-4. ACCESSORY AND

REMOTE CONTROLLER PARTS

13-3. INDOOR UNIT ELECTRICAL PARTS

24 25

13-3. INDOOR UNIT ELECTRICAL PARTS

SLEEVE BEARING

ROOM TEMPERATURE THERMISTOR

VARISTOR

FUSE

24 25

E02 448 426 E02 141 083

REMOTE CONTROLLER REMOTE CONTROLLER HOLDER

1 1

13-4. ACCESSORY AND REMOTE CONTROLLER PARTS

Page 63

T2W E56 521 T2W E45 232 T2W E56 531 M21 40L 245 M21 75K 297 M21 21J 501 T2W E56 301 T2W E56 515 T2W E56 293 T2W E57 630 M21 68V 961 T2W E56 645 M21 40J 662 M21 41A 661 T92 510 280 M21 54A 290 M21 20A 523 M21 K89 936 T2W E56 943 T2W E57 943

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20

GRILLE FRONT PANEL BACK PANEL SERVICE PANEL TOP PANEL PROPELLER OUTDOOR FAN MOTOR MOTOR SUPPORT SEPARATOR OUTDOOR HEAT EXCHANGER REVERSING VALVE PIPE ASSEMBL Y STOP VALVE (LIQUID) STOP VALVE (GAS) COMPRESSOR BASE CONDENSER NET CAPILLARY TUBE MUFFLER MUFFLER SPECIAL

Symbol

in Wiring

Diagram

Q'ty/unit

RA6V28-

EXP. VALVE, CAPILLARY

SNB-092FBA

2PC/SET{3.0✕{2.0✕300

RemarksPart No.

NO.

Part Name

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1

MUZ-A09RV-

MUZ-A12RV-

11 12

MUZ-A09RV - (WH) MUZ-A12RV - (WH)

13-5. OUTDOOR UNIT STRUCTURAL PARTS

When servicing , cut the tube to the propper length as shown in the REFRIGERANT SYSTEM DIAGRAM. See page 12.

Page 64

T2W E56 451 T2W E57 451 T2W E56 424 T2W E45 376 T2W E56 376 T2W E56 389 M21 90A 308 T2W E56 331 T2W E56 309 T2W E56 441

2 3 4 5 6 7 8 9

ELECTRIC CONTROL P.C BOARD ELECTRIC CONTROL P.C BOARD NOISE FILTER P.C BOARD TERMINAL BLOCK TERMINAL BLOCK REVERSING VALVE COIL FIN TEMPERATURE THERMISTOR REACTOR THERMISTOR SET RELAY P.C BOARD

Symbol

in Wiring

Diagram

Q'ty/unit

RemarksPart No.

NO.

Part Name

TB1 TB2

21S4

RT64

L64

RT61,62

1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1

MUZ-A09RV-

MUZ-A12RV-

MUZ-A09RV - (WH) MUZ-A12RV - (WH)

13-6. OUTDOOR UNIT

ELECTRICAL PARTS

Part number that is circled is not shown in the illustration.

Page 65

3m 5m

7m 10m 12m

9.52(3/8) 6.35(1/4) 31

MAC-A00PI MAC-A01PI MAC-A02PI MAC-A03PI MAC-A04PI

MSZ-A09RVMSZ-A12RV-

150

Pipe length

Cross-section

Part No.Model

A-Gas B-Liquid

Pipe size O.D mm (in.)

Insulation

Additional refrigerant

charge

R-410a(g)

E1 E1

14 OPTIONAL PARTS

13-7. AIR CLEANING FILTER

● AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity.

● Normal life of AIR CLEANING FILTER is 3 months. However, when it becomes dirty, replace it as soon as possible.

● Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet.

● DO NOT reuse AIR CLEANING FILTER even if it is washed.

● DO NOT remove or attach AIR CLEANING FILTER during unit operation.

13-8. DEODORIZING FILTER

● DEODORIZING FILTER removes ammonia and hydrogen sulfide emitted from tobacco, and odors of pets.

● Clean DEODORIZING FILTER every two weeks. If the filter is particularly dirty, clean the filter more often.

● For cleaning, soak the filter in warm water for a while, and then wash and rinse it. Dry the filter in the shade thoroughly.

● When the filter color is still dark even after cleaning, replace the filter with a new one.

Replace the filter at least once a year.

● DEODORIZING FILTER and AIR CLEANING FILTER can be attached on either side.

Model Part No.

MSZ-A09RV MSZ-A12RV -

MAC-1300FT

1. REFRIGERANT PIPES

The air conditioner has flared connections its indoor and outdoor sides. Please use the optional extension pipe as follows.

Model Part No.

MSZ-A09RV MSZ-A12RV -

MAC-1800DF

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HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100-8310 TELEX J24532 CABLE MELCO TOKYO

New publication, effective Mar. 1999 Specifications subject to change without notice.

Mitsubishi Electric MSZ-A09RV-WH, MSZ-A12RV-WH, MUZ-A12RV-E1, MUZ-A09RV-E1, MSZ-A12RV-E1 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual