Mitsubishi Electric Mr.SLIM MS24WN Bedienungsanleitung

SERVICE MANUAL

CONTENTS

1. FEATURES·························································3

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

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

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

5. OUTLINES AND DIMENSIONS ·······················12

6. WIRING DIAGRAM ··········································14

7. REFRIGERANT SYSTEM DIAGRAM··············15

8. MICROPROCESSOR CONTROL ····················16

9. SERVICE FUNCTIONS ····································25

10. TROUBLESHOOTING······································27

11. DISASSEMBLY INSTRUCTIONS·····················40

12. PARTS LIST······················································44

13. OPTIONAL PARTS ······················BACK COVER

Wireless type

Models

MS24WN (W) · MU24WN

The Slim Line.

From Mitsubishi Electric.

CUS

Remote

controller

SPLIT-TYPE, AIR CONDITIONERS

INDOOR UNIT

Indication of model name

MS24WN

OUTDOOR UNIT

Indication of model name

MU24WN

Revision:

●PARTS LIST have been partially modified.

●Please void OB311.

No. OB311

REVISED EDITION-A

OB311--1.qxp 04.1.13 9:53 AM Page 1

Revision:

• Parts No. has been changed due to the color change of outdoor unit parts. WHITE➔NEW WHITE (Brighter)

• Capillary tube has been added to parts list.

CAPILLARY TUBE (TAPER PIPE)

[0.14X[0.09X1-31/32 E02 784 936

Part number

Part name

Model

MU24WN

Page

OB311--1.qxp 04.1.13 9:53 AM Page 2

FEATURES

“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 provide even greater con-

trol 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 then 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.

SWING

AUTO-RESTART FUNCTION

The auto restart function restarts the equipment automatically

when power is restored following an outage. Operation resumes in

the mode in which the equipment was running just before the out-

age.

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.

LCD wireless

remote controller

MS24WN

Model 22,800 Btu/h

Cooling capacity

10.5

SEER

SWING

MS24WN

MU24WN

OB311--1.qxp 04.1.13 9:53 AM Page 3

PART NAMES AND FUNCTIONS

INDOOR UNIT

MS24WN

Installation plate

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

Remote controller holder

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)

MS24WN

ACCESSORIES

Grille

Air inlet

Remote control

receiving section

Horizontal vane

Remote controller

Deodorizing filter (option)

(Gray sponge type)

Air cleaning filter (option)

(White bellows type)

Air filter

Vertical vane

Operation section

(When the grille is opened)

Display section

Operation indicator lamp

Receiving section

Emergency operation switch

Front panel

Operation Indicator

OUTDOOR UNIT

MU24WN

OB311--1.qxp 04.1.13 9:53 AM Page 4

REMOTE CONTROLLER

MS24WN

ON/OFF

TOO

COOL

TOO

WARM

ON/OFF

FAN

TOO

WARM TOO

COOL

VANE

MODE

STOP

START

HR.

MIN.

WIDE VANE

LONG

I FEEL

COOL

DRY

CLOCK

RESET CLOCK

FAN

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 button

(Horizontal vane button)

CLOCK SET button

LONG button

WIDE VANE button

(Vertical vane button)

OB311--1.qxp 04.1.13 9:53 AM Page 5

Notes : Test conditions are based on ARI 210/240

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

❈2 : Rating conditions (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 82˚FDB, 65˚FWB

Operating Range

Item Model

Cooling capacity

Power consumption

EER [SEER]

INDOOR UNIT MODEL

External finish

Power supply

Max. fuse size (time delay)/ Disconnect switch

Min. ampacity

Fan motor

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. ampacity

Fan motor

Compressor

Refrigerant control

Sound level

Dimensions

Weight

REMOTE CONTROLLER

Control voltage (by built-in transformer)

REFRIGERANT PIPING

Pipe size

(Min. wall thickness)

Connection method

Between the indoor

& outdoor units

Refrigerant charge (R22)

Refrigerant oil (Model)

FAN Dry

COOL Dry(Wet)

Model

Winding resistance (at 68˚F) Ω

Liquid

Gas

Indoor

Outdoor

Height difference

Piping length

Btu/h

F.L.A

CFM

pt./h

dB(A)

in.

lb.

F.L.A

R.L.A

L.R.A

dB(A)

in.

lb.

in.

ft.

oz.

22,800

2,170

10.5 (10.5)

MS24WN

White

115V 60Hz 1[

1.1

0.82

431-491-565

402(346)-484(417)-565(487)

7.6

39-43-47

5/8

43-5/16

8-15/16

12-13/16

MU24WN

Munsell 5Y7/1

208/230V 60Hz 1[3 wires

0.87

PH33NPBT

C-R 0.84 C-S 2.09

Linear expansion valve

34-1/4

11-5/8

33-1/2

152

Wireless type

12V DC

Not supplied (optional parts)

3/8 (0.0285)

5/8 (0.0315)

Flared

Max. 25

Max. 50

4 Ib. 5 oz.

27.9 (MS32N1)

MS24WN

❈1

❈1❈2

Cooling Maximum

Minimum

Indoor intake air temperature

95˚FDB, 71˚FWB

67˚FDB, 57˚FWB

Outdoor intake air temperature

115˚FDB

67˚FDB

SPECIFICATION

OB311--1.qxp 04.1.13 9:53 AM Page 6

wHeight difference

should be within

25ft. regardless of

which unit, indoor

or outdoor

position is high.

wMax. Height

difference 25ft. Additional Piping

Max. length

Indoor

unit

Outdoor unit

MAX. HEIGHT DIFFERENCE

Outside

diameter Minimum

Wall

thickness Outside

diameter Minimum

Wall

thickness

MS24WN MU24WN

Additional piping

Max. length : ft.

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

Liquid Indoor unit Outdoor unit

Model

Gas :

Liquid : 0

Gas :

Liquid :16-15/16

19-11/16

[ 5/8 [ 3/8

0.0315 0.0285

MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE

OB311--1.qxp 04.1.13 9:53 AM Page 7

DATA

4-1. PERFORMANCE DATA

1) COOLING CAPACITY

MS24WN MU24WN

Model Refrigerant piping length (one way)

1.0

25ft. (std.)

0.954

40ft.

0.923

50ft.

MS24WN

2) COOLING CAPACITY CORRECTIONS

Model

Indoor air Outdoor intake air DB temperature(˚F)

27.9

26.4

24.9

SHC

13.9

16.7

19.0

TPC

1.93

1.82

1.74

26.1

24.6

23.0

SHC

13.0

15.5

17.6

TPC

2.12

2.01

1.92

24.5

22.8

21.4

SHC

12.2

14.4

16.4

TPC

2.28

2.17

2.07

22.8

21.2

19.5

SHC

11.3

13.4

14.9

TPC

2.40

2.30

2.21

21.0

19.5

17.8

SHC

10.4

12.3

13.6

TPC

2.50

2.41

2.30

IWB

(˚F)75 85 95 105 115

MS24WN

(208V/ 230V)

Notes 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.

4-2. PERFORMANCE CURVE

MS24WN

MU24WN

65 70 75 80 85 90 95 100 105 110 115

1.4

1.6

1.8

2.0

2.2

2.4

2.6

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

Outdoor intake air DB temperature (°F)

Indoor intake air WB temperature (°F)

Cooling

SHF at rating condition = 0.63

= 487CFM

= 0.16

Airflow

Bypass Factor

208V/230V

OB311--1.qxp 04.1.13 9:53 AM Page 8

4-3. Condensing pressure

Data is based on the condition of indoor humidity 50%.

Air flow should be set at High.

MU24WN

70 75 80 85 90 95 100 104(°F)

100

70 75 80 85 90 95 100 104(°F)

160

180

200

220

240

260

280

300

Condensing pressure

Outdoor ambient temperature

(PSIG)

Indoor DB temperature

(PSIG)

Suction pressure

Outdoor ambient temperature

OB311--1.qxp 04.1.13 9:53 AM Page 9

✻ Control voltage

Power supply voltage to

serial signal circuit is 12V DC.

Voltage between 11+ and 33--

on in-out terminal block will be

12V DC peak.

•Both wirings can be applied.

MS24WN INDOOR UNIT INDOOR UNIT

115V 60Hz 1[,

2wires

OUTDOOR UNIT

208/230V

60Hz 1[, 3 wires

SIGNAL WIRE

2 wires 12V DC OUTDOOR UNIT

208/230V

60Hz 1[, 3 wires

115V 60Hz 1[,

2 wires

Disconnect switch

SIGNAL WIRE

2 wires 12V DC

115V

4-4. STANDARD OPERATION DATA

MS24WN

Cooling

22,800

0.63

2.17

MS24WN

115V 60Hz 1[

0.071

0.62

MU24WN

208/230V 60Hz 1[

2.099

9.36/ 8.30

0.67/0.71

250

174

115

158

4 Ib. 5 oz.

1,280

487(Wet)

—

750/820

1,589/1,765

Capacity

SHF

Input

INDOOR UNIT MODEL

Power supply

Input

Fan motor current

OUTDOOR UNIT MODEL

Power supply

Input

Comp. current

Fan motor current

Condensing pressure

Suction pressure

Discharge temperature

Condensing temperature

Suction temperature

Comp. shell bottom temp

Ref. pipe length

Refrigerant charge (R22)

Intake air temperature

Discharge air temperature

Fan speed (High)

Airflow (High)

Intake air temperature

Fan speed

Airflow

Unit

Btu / h

—

PSIG

˚F

ft.

—

˚F

rpm

CFM

˚F

rpm

CFM

Item

Model

Total

Electrical

circuit

Refrigerant

circuit

Indoor

unit

Outdoor

unit

POWER SUPPLY

OB311--1.qxp 04.1.13 9:53 AM Page 10

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