Mitsubishi Electric Mr.Slim MSH24WN Manuel utilisateur

SERVICE MANUAL

CONTENTS

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

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

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

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

5. OUTLINES AND DIMENSIONS ·······················13

6. WIRING DIAGRAM ··········································15

7. REFRIGERANT SYSTEM DIAGRAM··············16

8. MICROPROCESSOR CONTROL ····················17

9. SERVICE FUNCTIONS ····································29

10. TROUBLESHOOTING······································31

11. DISASSEMBLY INSTRUCTIONS·····················44

12. PARTS LIST······················································48

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

Wireless type

Models

MSH24WN (W) ·MUH24WN

SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS

The Slim Line.

From Mitsubishi Electric.

CUS

INDOOR UNIT

Indication of model name

MSH24WN

OUTDOOR UNIT

Indication of model name

MUH24WN

Remote

controller

Revision:

●PARTS LIST have been partially modified.

●Please void OB310.

No. OB310

REVISED EDITION-A

OB310--1.qxp 04.1.13 9:47 AM Page 1

Revision:

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

• Capillary tubes have been added to parts list.

CAPILLARY TUBE (TAPER PIPE)

[0.17X[0.12X11-13/16

CAPILLARY TUBE (TAPER PIPE)

[0.17X[0.12X1-31/32

E02 785 936

E02 529 936

Part number

Part name

Model

MUH24WN

Page

OB310--1.qxp 04.1.13 9:47 AM Page 2

LCD wireless

remote controller

“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.

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

MSH24WN

Model 22,000 Btu/h

Cooling capacity

23,600 Btu/h

Heating capacity

10.0

SEER 6.8/5.9

HSPF(44/55)

SWING

FEATURES

MSH24WN

MUH24WN

OB310--1.qxp 04.1.13 9:47 AM Page 3

PART NAMES AND FUNCTIONS

INDOOR UNIT

MSH24WN

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)

MSH24WN

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

MUH24WN

OB310--1.qxp 04.1.13 9:47 AM Page 4

REMOTE CONTROLLER

MSH24WN

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

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 button

(Horizontal vane button)

CLOCK SET button

LONG button

WIDE VANE button

(Vertical vane button)

OB310--1.qxp 04.1.13 9:47 AM 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)

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

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

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

Operating Range

Item Model

Capacity

Power

consumption

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

Pipe size

(Min. wall thickness)

Connection method

Between the indoor

& outdoor units

Refrigerant charge (R22)

Refrigerating oil (Model)

Btu/h

F.L.A

A(kW)

CFM

pt./h

dB(A)

in.

Ib.

F.L.A

R.L.A

L.R.A

dB(A)

in.

Ib.

in.

ft.

lb.

oz.

MSH24WN

22,000

23,600

13,500

2,220

2,230

1,730

9.9 (10.0)

6.8 (5.9)

3.10

MSH24WN

White

115V 60Hz 1[

1.1

0.82

–

431-491-565

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

7.3

39-43-47

5/8

43-5/16

8-15/16

12-13/16

MUH24WN

Munsell 5Y 7/1

208/230V 60Hz 1[3 wires

0.87

PH33NPBT

C-R 0.84 C-S 2.09

Linear expansion valve

Reverse cycle

34-1/4

11-5/8

33-1/2

154

Wireless type

12V DC

Not supplied (optional parts)

3/8 (0.0285)

5/8 (0.0315)

Flared

Max. 25

Max. 50

4 Ib. 0 oz.

27.9 (MS32N1)

❈1❈3

❈1

❈2

❈1❈1

❈2

Cooling

Heating 47

Heating 17

Cooling

Heating 47

Heating 17

Cooling

Heating

HEAT Dry

COOL Dry(Wet)

Model

Winding resistance (at 68˚F) Ω

Liquid

Gas

Indoor

Outdoor

Height difference

Piping length

❈1

Cooling

Heating

Maximum

Minimum

Maximum

Minimum

Indoor intake air temperature

95˚FDB, 71˚FWB

67˚FDB, 57˚FWB

80˚FDB, 67˚FWB

70˚FDB, 60˚FWB

Outdoor intake air temperature

115˚FDB

67˚FDB

75˚FDB, 65˚FWB

17˚FDB, 15˚FWB

OB310--1.qxp 04.1.13 9:47 AM 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

MSH24WN MUH24WN

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

OB310--1.qxp 04.1.13 9:47 AM Page 7

DATA

Model Refrigerant piping length (one way)

1.0

25ft. (std.)

0.954

40ft.

0.923

50ft.

MSH24WN

2) COOLING CAPACITY CORRECTIONS

3) HEATING CAPACITY

(208V/ 230V)

Model

Indoor air Outdoor intake air WB temperature(˚F)

13.7

14.5

14.9

TPC

1.66

1.61

1.54

17.1

17.7

18.5

TPC

1.95

1.91

1.84

20.4

20.9

21.6

TPC

2.17

2.12

2.06

23.0

23.6

24.3

TPC

2.29

2.23

2.17

23.7

24.3

25.0

TPC

2.32

2.27

2.21

26.9

27.5

28.1

TPC

2.41

2.36

2.32

IDB

(˚F)15 25 35 43 45 55

MSH24WN

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.

4-1. PERFORMANCE DATA

1) COOLING CAPACITY

MSH24WN MUH24WN

Model

Indoor air Outdoor intake air DB temperature(˚F)

27.0

25.5

24.0

SHC

13.4

16.1

18.3

TPC

1.98

1.86

1.78

25.2

23.8

22.2

SHC

12.5

15.0

17.0

TPC

2.16

2.05

1.96

23.7

22.0

20.7

SHC

11.7

13.9

15.8

TPC

2.33

2.22

2.12

22.0

20.5

18.8

SHC

10.9

12.9

14.4

TPC

2.45

2.35

2.26

20.2

18.8

17.2

SHC

10.1

11.9

13.1

TPC

2.55

2.46

2.35

IWB

(˚F)75 85 95 105 115

MSH24WN

(208V/ 230V)

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.

OB310--1.qxp 04.1.13 9:47 AM Page 8

4-2. PERFORMANCE CURVE

MSH24WN

MUH24WN

65 70 75 80 85 90 95 100 105 110 115

1.6

1.8

2.0

2.2

2.4

2.6

15 20 25 30 35 40 45 50 55 60

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

= 0.19

Airflow

Bypass Factor

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

Outdoor intake air WB temperature (°F)

Indoor intake air DB temperature (°F)

Heating

= 565CFM

Airflow

208V/230V

OB310--1.qxp 04.1.13 9:47 AM Page 9

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

Air flow should be set to High speed.

4-3. Condensing pressure

MSH24WN

(Cooling)

Data is based on the condition of outdoor humidity 75%.

Air flow should be set to High speed.

Data is for heating operation without any frost.

MSH24WN

(Heating)

68 70 75 80 85 90 95 100 104(°F)

100

Suction pressure

Outdoor ambient temperature

68 70 75 80 85 90 95 100 104(°F)

140

160

180

200

220

240

260

280

300

(PSIG)

Condensing pressure

Outdoor ambient temperature

Indoor DB temperature (°F)

(PSIG)

5 10152025303540455055606570(°F)

140

160

180

200

220

240

260

280

300

320

340

Indoor DB temperature(°F)

(PSIG)

Condensing pressure

Outdoor ambient temperature

(PSIG)

Suction pressure

Outdoor ambient temperature

5 10152025303540455055606570(°F)

Indoor DB temperature (°F)

OB310--1.qxp 04.1.13 9:47 AM Page 10

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