Mitsubishi Electric Mr.Slim MSZ09UN W Manual de usuario

SERVICE MANUAL

CONTENTS

1. FEATURES·························································2

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

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

4. DATA···································································8

5. OUTLINES AND DIMENSIONS ·······················18

6. WIRING DIAGRAM ··········································20

7. REFRIGERANT SYSTEM DIAGRAM··············22

8. MICROPROCESSOR CONTROL ····················23

9. SERVICE FUNCTIONS ····································39

10. TROUBLESHOOTING······································41

11. DISASSEMBLY INSTRUCTIONS·····················61

12. PARTS LIST······················································68

13. OPTIONAL PARTS···········································74

Wireless type

Models

MSZ09UN (W) · MUZ09UN

MSZ12UN (W) · MUZ12UN

No. OB297

REVISED EDITION-A

The Slim Line.

From Mitsubishi Electric.

CUS

Remote

controller

SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS

MSZ09UN

INDOOR UNIT

MUZ09UN

MUZ12UN

OUTDOOR UNIT

Revision A:

●Conditions of operation frequency have been added.

Please void OB297.

OB297--1.qxp 04.2.4 4:19 PM Page 1

1FEATURES

MSZ09UN

MUZ09UN

MUZ12UN

LCD wireless

remote controller

MSZ12UN

High–speed cooling & heating

Ideal and comforting performance is assured by controlling compressor

rotation according to the cooling and heat load of a room. Inverter tech-

nology promotes maximum compressor efficiency by flexibly changing

the rotation speed of it to accurately match operating requirements.

Optimum comfort year-round

To ensure that a room is never too cold or too hot, inverter technology

allows the system to detect subtle fluctuations in room temperature and

adjust automatically. Unlike conventional air conditioning units that must start

or stop the compressor repetitively, inverter units offer finely tuned operation

– such as the accurate control of room temperature – for a more comforting

airflow and far less temperature variations.

Hours

Room Temperature

Single speed comppressor Model

Temperature is adjusted by

turning on/ off the compressor.

Inverter Model

Constant temperature is maintained

by compressor speed control.

Cool

MSH12EN MSZ12UN

6.8

7.7

Heat

MSH12EN MSZ12UN

Extra energy – savings

Inverter technology makes the value of SEER and HSPF better compared to non-inverter model’s value.

Model Cooling capacity Heating capacity SEER HSPF(44/55)

MSZ09UN 8,800 Btu/h 12,300 Btu/h 12.0 7.7/6.7

MSZ12UN 11,400 Btu/h 16,000 Btu/h 13.0 7.7/6.7

High / Low

MSH09EW MSH12EN

Model

Fan speed

Sound level

MSZ09UN MSZ12UN

43 / 32 36 / 22 42 / 35

48 / 38

(dBA)

The sound level of indoor unit has been lowered.

Revision A:

• Conditions of operation frequency have been added.

• SPECIFICATION, DATA, WIRING DIAGRAM and PARTS LIST have been partially modified.

OB297--1.qxp 04.2.4 4:19 PM Page 2

“I FEEL CONTROL” IN OUR LCD WIRELESS REMOTE CONTROLLER WITH ON/OFF PROGRAM TIMER

Mitsubishi Electric’s new wireless remote controller incorporates a number of advanced features that provides even greater

control and ease-to-use. It has a liquid crystal display which indicates such information as mode, fan speed and temperature

selected as well as the programmed ON/OFF timer. It is also equipped with “I Feel Control”, a unique Mitsubishi Electric fea-

ture that allows the user to adjust the temperature to exactly the level he or she wants simply by tapping the button that

describes present conditions : “Too Cool” or “Too Warm”. The optimum temperature set this way is that memorized for immedi-

ate recall whenever the air conditioner is used again.

Select desired air flow direction.

REMOTE-CONTROL OPERATION MODE

Using the remote controller, you can select from five airflow set-

tings to match room layout and the location of people. Also, you

can set the vane to swing automatically.

AUTO-RESTART FUNCTION

The auto-restart function restarts the equipment when power is

restored following an outage automatically. Operation resumes in

the mode in which the equipment was running immediately before

the outage.

HIGH PERFORMANCE ROTARY COMPRESSOR

The advanced design of Mitsubishi Electric’s powerful and energy

efficient rotary compressor results in lower operating costs and

longer service life.

SWING

Single rotary:

Centrifugal force always

produced in one direction,

resulting in excessive vibration.

Twin rotary:

Centrifugal force of one

roller counterbalanced

by that of the other roller

for significantly lower vibration.

MSH09EW MSH12EN

Model

Size

MSZ09UN MSZ12UN

14-13/16 10-15/16 12-5/8

14-3/16

(in.)

The height of indoor unit has been shortened.

Outdoor unit: Twin rotary compressor greatly reduces noise

Unlike conventional models equipped with a single rotary, the features a twin-rotary compressor that provides balanced rota-

tion – the centrifugal force of one roller is counterbalanced by the other – for significantly reduced vibration and noise. It’s

exactly this kind of technology that makes Mitsubishi Electric’s outdoor units so quiet.

MUH12EN

Sound level (Cooling/Heating)

MUZ12UN

49 / 49

54 / 54

dB(A)

The sound level of outdoor unit has been lowered.

OB297--1.qxp 04.2.4 4:19 PM Page 3

PART NAMES AND FUNCTIONS

INDOOR UNIT

MSZ09UN

Operation section

Emergency operation switch

Horizontal vane

Air filter

Deodorizing filter(option)

(gray sponge type)

Vertical vanes

Air inlet

Grille

Remote control

receiving section

Remote controller

Air cleaning filter(option)

(white bellows type)

Front panel

Emergency operation switch Operation indicator lamp

Receiving section

Operation indicator lamp

Receiving section

(When the grille is opened)

MSZ09UN MSZ09UN

Air inlet (back and side)

Piping

Drainage hose

Service panel

Air outlet

Drain outlet

OUTDOOR UNIT

MUZ09UN

MUZ12UN

MSZ12UN MSZ12UN

MSZ12UN

OB297--1.qxp 04.2.4 4:19 PM Page 4

Installation plate

Installation plate fixing screw 4 x 25 mm(0.16 x 0.98 in.)

Remote controller mounting hardware

Fixing screw for 33.5 x 16 mm(0.14 x 0.63 in.) (Black)

Battery (AAA) for remote controller

Wireless remote controller

Felt tape (Used for left or left-rear piping)

1

2

3

4

5

6

MSZ09UN

MSZ12UN

ACCESSORIES

REMOTE CONTROLLER

MSZ09UN

MSZ12UN

ON/OFF

TOO

COOL

TOO

WARM

ON/OFF

FAN

TOO

WARM TOO

COOL

VANE

MODE

STOP

START

HR.

MIN.

I FEEL

COOL

HEAT

DRY

CLOCK

RESET CLOCK

Open the front lid.

Signal transmitting section

Operation display section

OPERATE /STOP

(ON /OFF)button

TEMPERATURE buttons

OPERATION SELECT button

FAN SPEED CONTROL button

OFF-TIMER button

HR. button

MIN. button

(TIME SET button)

ON-TIMER button

RESET button

VANE CONTROL button

CLOCK SET button

OB297--1.qxp 04.2.4 4:19 PM Page 5

SPECIFICATION

NOTE : Test conditions are based on ARI 210/240.

❈1 : Rating conditions(cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB) Rated frequency: Hz

(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB Rated frequency: Hz

❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB Maximum frequency: Hz

Item Model MSZ12UN

Capacity

Rated(Minimum~Maximum)

Capacity Rated

Power consumption

Rated(Minimum~Maximum)

Power consumption Rated

EER [SEER]

HSPF IV(V)

COP

INDOOR UNIT MODEL

External finish

Power supply

Max. fuse size (time delay)/ Disconnect switch

Min. circuit ampacity

Fan motor

Auxiliary heater

Airflow Low—Med.—High

Moisture removal

Sound level Low-Med.-High

Cond. drain connection O.D.

Dimensions

Weight

OUTDOOR UNIT MODEL

External finish

Power supply

Max. fuse size (time delay)

Min. circuit ampacity

Fan motor

Compressor

Refrigerant control

Sound level

Defrost method

Dimensions

Weight

REMOTE CONTROLLER

Control voltage (by built-in transformer)

REFRIGERANT PIPING

Refrigerant pipe size

(Min. wall thickness)

Connection method

Between the indoor

& outdoor units

Refrigerant charge (R22)

Refrigerating oil (Model)

Btu/h

V, phase, Hz

F.L.A

A(kW)

CFM

pt./h

dB(A)

in.

Ib.

V, phase, Hz

F.L.A

R.L.A

L.R.A

dB(A)

in.

Ib.

in.

ft.

oz.

7.7 (6.7)

White

115, 1, 60

–

5/8

7-1/2

Munsell 5.6Y 8.0/0.5

208/230, 1, 60

0.43

SHV-130FEA

U-V 1.05 U-W 1.05 U-W 1.05

9.7

Liner expansion valve

Reverse cycle

10-1/16

21-1/4

Wireless type

12V DC

Not supplied (optional parts)

1/4 (0.0265)

Flared

Max. 25

Max. 49

10.8 (MS56)

11,400(2,900~13,000)

16,000(2,400~19,500)

11,600

1,140(290~1,460)

1,590(280~2,050)

1,760

10.0[13.0]

2.95

MSZ12UN

0.6

0.43

360-395-452

360(311)-395(339)-452(388)

2.8

35-39-42

39-15/16

12-5/8

MUZ12UN

1/2 (0.0285)

2 Ib. 14 oz.

8,800(2,600~9,700)

12,300(2,300~15,700)

10,000

980(290~1,250)

1,320(280~1,770)

1,420

9.0 [12.0]

2.73

MSZ09UN

0.5

0.37

184-237-297

148(124)-215(180)-279(233)

2.3

22-29-36

33-1/2

10-15/16

3/8 (0.0285)

2 Ib. 7 oz.

❈1❈3

❈1

❈2

❈1❈1

❈2

Cooling

Heating 47

Heating 17

Cooling

Heating 47

Heating 17

Cooling

Heating

MSZ09UN

MUZ09UN

HEAT Dry

COOL Dry(Wet)

Model

Winding resistance (at 68˚F) Ω

Liquid

Gas

Indoor

Outdoor

Height difference

Piping length

❈1

❈4

OB297--1.qxp 04.2.4 4:19 PM Page 6

Indoor

unit

w Max. Height

difference 25ft. Outdoor unit

Refrigerant Piping

Max.length

w Height difference should be within

25ft. regardless of which unit,

indoor or outdoor position is high.

MAX. HEIGHT DIFFERENCE

Outside

diameter Minimum

Wall

thickness Outside

diameter Minimum

Wall

thickness

MSZ09UN

MSZ12UN

MUZ09UN

MUZ12UN

Additional piping

Max. length : ft.

GasPiping size : in. Length of connecting pipe : in.

Liquid Indoor unit Outdoor unit

Model

Gas :

Liquid :

Gas :

Liquid :

16-15/16

19-11/16

[ 3/8

[ 1/2 [ 1/4

0.0285 0.0265

MAX. REFRIGERANT PIPING LENGTH

Test condition

SEER

(Cooling)

HSPF

(Heating)

ARI

Mode

"A" Cooling Steady State

at rated compressor Speed

"B-2" Cooling Steady State

at rated compressor Speed

"B-1" Cooling Steady State

at minimum compressor Speed

Low ambient Cooling Steady State

at minimum compressor Speed

Intermediate Cooling Steady State

At Intermediate compressor Speed❈5

Standard Rating-Heating

at rated compressor Speed

Low temperature Heating

at rated compressor Speed

Max temperature Heating

at minimum compressor Speed

High temperature Heating

at minimum compressor Speed

Frost Accumulation

at rated compressor Speed

Test Indoor air condition Outdoor air condition

Dry bulb Wet bulb Dry bulb Wet bulb

Frost Accumulation

at Intermediate compressor Speed❈5

(75)

(65)

(53.5)

(69)

56.5

❈5 : At Intermediate compressor Speed

=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".

(Unit : [˚F])

❈3, ❈4

OB297--1.qxp 04.2.4 4:19 PM Page 7

DATA

Model

Indoor air Outdoor intake air DB temperature(˚F)

10.8

10.2

9.6

14.0

13.2

12.4

6.1

7.1

8.0

8.3

9.7

10.7

0.87

0.82

0.78

1.01

0.96

0.91

10.1

9.5

8.9

13.1

12.3

11.5

5.7

6.7

7.4

7.8

9.0

9.9

0.96

0.91

0.87

1.11

1.05

1.01

9.5

8.8

8.3

12.3

11.4

10.7

5.4

6.2

6.9

7.3

8.3

9.3

1.03

0.98

0.94

1.20

1.14

1.09

8.8

8.2

7.5

11.4

10.6

9.7

5.0

5.7

6.3

6.8

7.7

8.4

1.08

1.04

1.00

1.26

1.21

1.16

8.1

7.5

6.9

10.5

9.7

8.9

4.6

5.3

5.7

6.3

7.1

7.7

1.13

1.09

1.04

1.31

1.27

1.21

IWB

(˚F)75 85 95 105 115

MSZ09UN

MSZ12UN

NOTE 1. IWB : Intake air wet-bulb temperature

TC : Total Capacity (x103 Btu/h), SHC : Sensible Heat Capacity (x103 Btu/h)

TPC : Total Power Consumption (kW)

2. SHC is based on 80˚F of indoor intake air DB temperature.

TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC

4-1. PERFORMANCE DATA

1) COOLING CAPACITY

MSZ09UN

MSZ12UN MUZ09UN

MUZ12UN

Model Refrigerant piping length (one way : ft.)

1.0

25 (std.)

0.954

0.927

MSZ09UN

MSZ12UN MUZ09UN

MUZ12UN

2) COOLING CAPACITY CORRECTIONS

3) HEATING CAPACITY

Model

Indoor air Outdoor intake air WB temperature(˚F)

7.1

7.6

7.7

9.3

9.8

10.1

0.98

0.95

0.91

1.18

1.14

1.10

8.9

9.2

9.7

11.6

12.0

12.6

1.16

1.13

1.09

1.39

1.36

1.31

10.6

10.9

11.3

13.8

14.2

14.6

1.29

1.25

1.22

1.55

1.51

1.47

12.0

12.3

12.7

15.6

16.0

16.5

1.35

1.32

1.29

1.63

1.59

1.55

12.4

12.7

13.0

16.1

16.5

17.0

1.37

1.35

1.31

1.65

1.62

1.57

14.0

14.3

14.6

18.2

18.6

19.0

1.43

1.40

1.37

1.72

1.69

1.65

IDB

(˚F)15 25 35 43 45 55

MSZ09UN

MSZ12UN

NOTE: 1. IDB : Intake air dry-bulb temperature

TC : Total Capacity (x103 Btu/h)

TPC : Total Power Consumption (kW)

2. Above data is for heating operation without any frost.

TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC

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 EMERGENCY COOL mode

or EMERGENCY HEAT mode before starting to operate the air conditioner.

2. The compressor starts up.

The operational frequency of the compressor is MSZ09UN: 64Hz, MSZ12UN: 70Hz in EMERGENCY COOL mode and

58Hz in EMERGENCY HEAT mode.

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

4. This operation continues for 30minutes.

5. In order to release this operation, press the EMERGENCY OPERATION switch twice or once, or press any button on the

remote controller.

OB297--1.qxp 04.2.4 4:19 PM Page 8

4-2. PERFORMANCE CURVE

Total power consumption (kW) Total capacity ( ✕103Btu/h)

Outdoor intake air DB temperature (°F)

SHF at rating condition = 0.70

= 233CFM

= 0.23

Airflow

Bypass Factor

1.2

65 75 85 95 105 115

0.8

0.6

Total power consumption (kW) Total capacity ( ✕103Btu/h)

Outdoor intake air WB temperature (°F)

= 297CFM

Airflow

1.6

1.4

15 25 35 45 55

1.0

0.6

0.8

1.2

1.0

Indoor intake air WB temperature (°F)

Indoor intake air DB temperature (°F)

Indoor intake air WB temperature (°F)

0.4

MSZ09UN MUZ09UN

(Heating)

MSZ09UN MUZ09UN

(Cooling)

This value of frequency is not the same as the actual frequency in operating. Refer to the page 16, 17 for the relationships

between frequency and capacity.

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 EMERGENCY COOL mode

or EMERGENCY HEAT mode before starting to operate the air conditioner.

2. The compressor starts up.

The operational frequency of the compressor is 64Hz in EMERGENCY COOL mode and 58Hz in EMERGENCY HEAT

mode.

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

4. This operation continues for 30minutes.

5. In order to release this operation, press the EMERGENCY OPERATION switch twice or once, or press any button on the

remote controller.

OB297--1.qxp 04.2.4 4:19 PM Page 9

MSZ12UN MUZ12UN

(Cooling)

1.5

1.3

1.1

0.9

0.7

0.5

Indoor intake air WB temperature (°F)

2.0

1.0

SHF at rating condition = 0.73

= 388CFM

= 0.19

Airflow

Bypass Factor

65 75 85 95 105 115

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

Outdoor intake air DB temperature (°F)

Indoor intake air DB temperature (°F)

= 452CFM

Airflow

15 25 35 45 55

Total power consumption (kW) Total capacity ( ✕10 Btu/h)

Outdoor intake air WB temperature (°F)

1.2

1.4

1.6

1.8

Indoor intake air DB temperature (°F)

MSZ12UN MUZ12UN

(Heating)

This value of frequency is not the same as the actual frequency in operating. Refer to the page 16, 17 for the relationships

between frequency and capacity.

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 EMERGENCY COOL mode

or EMERGENCY HEAT mode before starting to operate the air conditioner.

2. The compressor starts up.

The operational frequency of the compressor is 70Hz in EMERGENCY COOL mode and 58Hz in EMERGENCY HEAT

mode.

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

4. This operation continues for 30minutes.

5. In order to release this operation, press the EMERGENCY OPERATION switch twice or once, or press any button on the

remote controller.

OB297--1.qxp 04.2.4 4:19 PM Page 10

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