Mitsubishi MCF-C13UV-E1, MCF-C18UV-E1, MCF-C24UV-E1, MUCF-C13UV-E1, MUCF-C18UV-E1 Service Manual

SERVICE MANUAL

(When installed on the ceiling)

(When installed on the floor)

FLOOR AND CEILING TYPE AIR CONDITIONERS

HFC

utilized

R407C

Wireless type
Models

No. OB299

MCF-C13UV­MCF-C18UV­MCF-C24UV-

(WH)
(WH)
(WH)

·MUCF-C13UV-

·MUCF-C18UV-

·MUCF-C24UV-

CONTENTS

1. TECHNICAL CHANGES ····································2

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

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

4. NOISE CRITERIA CURVES·······························7

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

6. WIRING DIAGRAM···········································11

7. REFRIGERANT SYSTEM DIAGRAM··············14

8. PERFORMANCE CURVES······························16

9. MICROPROCESSOR CONTROL ····················24

10. SERVICE FUNCTIONS·····································30

11. TROUBLESHOOTING ······································31

12. DISASSEMBLY INSTRUCTIONS·····················37

13. PARTS LIST······················································43

14. OPTIONAL PARTS ······················BACK COVER

E1E1

E1E1

E1E1

1

Lubricant

Refrigerant

New refrigerant

R407C

R32: R125: R134a (23%:25%:52%)

Non-azeotropic refrigerant

Not included

A1/A1

86.2

-43.6

0.9177

42.5

Non combustible

0

1530

From liquid phase in cylinder

Impossible

Incompatible oil

Non
Non

Previous refrigerant

R22

HCFC22 (100%)

Single refrigerant

Included

A1

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 [Gauge])
Saturated steam density [25:](Kg/K)
Combustibility
ODP w1
GWP w2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell

w1:Ozone Destruction Parameter : based on CFC11
w2 :Global Warmth Parameter : based on CO

2

New Specification Previous Specification

The incompatible lubricant easily separates from refrigerant
and makes the layer in the upper inside the suction muffler.
The higher position of the returning oil hole enables to return
the lubricant of the upper layer to the compressor.

Since refrigerant and lubricant are compatible each other,
lubricant returns to the compressor through the lower
position returning oil hole.

Compressor

Suction muffler

Returning oil hole

Lubricant

Refrigerant

Compressor

Suction muffler

Returning oil hole

Lubricant and Refrigerant

Compressor

-30 -20 -10 0 10 20

30

40 50 60

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

(MPa[Gauge])

R407C
R22

Conversion chart of refrigerant temperature and pressure

Saturated liquid pressure

(:)

TECHNICAL CHANGES

INFORMATION FOR THE AIR CONDITIONER WITH R407C REFRIGERANT

This room air conditioner adopts HFC refrigerant (R407C) which never destroy the ozone layer.
Pay attention to following points.

1 Take sufficient care not to allow water and other contaminations to enter the R407C refrigerant during storage and

installation, since it is more susceptible to contaminations than HCFC (R22) refrigerant.

2 Clean refrigerant piping should be used.
3 Composition change may occur in R407C since it is a mixed refrigerant. When charging, charge liquid refrigerant to

prevent composition change.

4 Be especially careful when managing the tools.

If dust, dirt, or water mixes in the refrigerant cycle, it may cause decrease of performance.

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[Gauge]) =10.2(kgf/ff[Gauge])

2

1.Tools dedicated for the air conditioner with R407C refrigerant

R407C tools Can R22 tools be used?

Gas leak detector

A gauge manifold with a sight glass is recommended for charging the
liquid refregerant.

Hose material have been changed to improve the pressure
resistance.

Dedicated for HFC refrigerant.

Description

Provided to prevent the back flow of oil. This adapter enables you to use
existing vacuum pumps.

No

No

No

Yes
Yes

New

New

Gauge manifold

Charge hose

Torque wrench
Flare tool

Vacuum pump
adapter

Electronic scale for
refrigerant charging

Use the electronic control scale for measuring the R407C.

The following tools are required for R407C refrigerant. Some R22 tools can be substituted for R407C tools.
Do not use tools that are used with R22 refrigerant in order to avoid mixing oils.

2.Refrigerant piping

Do not use copper pipes which are broken, deformed or discoloured.
In addition, be sure that the inner surfaces of the pipes are clean, free of hazardous sulfur and oxides, or have no dust/ dirt,
shaving particles, oil, moisture or any other contamination.

•If there is a large amount of residual oil inside the piping and joints, deterioration of the refrigerant oil will result.

3.Refrigerant oil

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

4.Air purge

Use the vacuum pump for air purge to protect environments, and to avoid changing the composition of refrigerant.

5.Additional charge

For additional charging, charge the refrigerant with liquid phase slowly using a gas cylinder. If the refrigerant is charged with
gas phase, the composition of refrigerant will change. In this case, ability of the refrigerating cycle decreases or normal
operation can be impossible.
If liquid refrigerant is rapidly charged at once, the compressor may be locked.

NOTE: 1. The R407C is mixed refrigerant which consist of three different kinds of evaporative temperature. As a result, the

R407C occurs the change of composition.

2. Additional refrigerant charge has been changed by change of refrigerant.(R22 ➔ R407C)

R22 : <MCF-type> 15g/m ➔ R407C : <MCF-C13UV> 15g/m, <MCF-C18/C24UV> 20g/m

Union

Stop valve

Indoor unit

Refrigerant
gas cylinder
operating
valve

Refrigerant (liquid)

Liquid pipe
Gas pipe

Service port

Gage manifold

Charge hose

Refrigerant gas cylinder
for R407C with siphon

Electronic scale for
refrigerant charging

Outdoor unit

3

(When installed on the floor)

(When the air inlet grille is opened.)

Deodorizing filter
(gray sponge type)(option)

Air filter

Remote controller

Air inlet

Operation section

Air cleaning filter
(white bellows type)(option)

Front panel

Receiving section

Operation indicator lamp

Horizontal vane

Vertical vanes

Emergency
operation switch

(When installed on the ceiling)

ACCESSORIES

Item

Installation plate
Unit fixing screw
5 o 12mm
Wireless remote
controller
Remote controller
holder
Fixing screw for

3.5 o 16mm (Black)
Battery (AAA) for
remote controller
Drain hose
Drain pipe cover
Knockout cover
Screw for 4 o 10mm
Refrigerating oil

2
2

1
1
2
2

1
1
1
2
1

Q'ty

1

2

3

4

4

5

6

7
8
9

9

0
1

2

PART NAMES AND FUNCTIONS

MCF-C13UV - MCF-C18UV - MCF-C24UV -

INDOOR UNIT

E1E1E1

MUCF-C13UV -

E1

OUTDOOR UNIT

MUCF-C18UV - MUCF-C24UV -

Air inlet

(back and side)

Piping

Drain hose

Air outlet

Drain outlet

OUTDOOR UNIT

E1E1

Air inlet
Piping

Drain hose

Air outlet

Drain outlet

4

MCF-C13UV - MCF-C18UV - MCF-C24UV -

REMOTE CONTROLLER

Signal transmitting section

E1E1E1

Operation display section

OPERATE /STOP

(ON /OFF)button

Open the front lid.
Open the front lid.

ON/OFF

ON/OFF

TOO

WARM

CLOCK

TOO

WARM

PM

AM

TOO

COOL

PM

AM

TOO

COOL

TEMPERATURE buttons

FAN SPEED CONTROL button

OPERATION SELECT button

RESET button

I FEEL

FAN

MODE

COOL

DRY

FAN

VANE

RESET

5

CLOCK

STOP

START

HR.

MIN.

OFF-TIMER button

ON-TIMER button

HR. button

MIN. button

(TIME SET button)

CLOCK SET button

VANE CONTROL button

3

Indoor model

Function

Power supply

Capacity
Dehumidification
Air flow

(High/Med.W/LowW)
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(High/Med.W/LowW)
Fan speed(High/Med.

W

/LowW)
Fan speed regulator
Thermistor RT11(at25:)
Thermistor RT12(at25:)
Outdoor model
Air flow

(High/LowW)
Compressor motor current
Fan motor current
Model
Output
Winding
resistance(at20:)
Model
Winding
resistance(at20:)
Dimensions WOHOD
Weight
Sound level (High)
Fan speed

(High/LowW)
Fan speed regulator
Refrigerant filling
capacity(R407C)
Refrigerating oil (Model)

kW

R/h

K /h

A
A

W

A(kW)

%

A
A

"

mm

kg

dB

rpm

k"
k"

K /h

A
A

W

"

"

mm

kg

dB

rpm

kg
cc

MCF-C18UV -

E1

Cooling

Single phase

230V, 50Hz

5.0

2.3

840/696W/570

W

15

9.7

2,180

98
50

0.36

2.29

RB4V36-AB
WHT-BLK 82.9 BLK-YLW 65.6
YLW-BLU 36.0 BLU-BRN 27.0

BRN-RED 13.7

1,100O650O180

26

5

48/44

W

/39

W

1,320/1,145W/960

W

3
10
10

MUCF-C18UV -

E1

High:2,238

8.95

0.39

PE33VPEHT

1,500
C-R 1.08
C-S 2.18

RA6V50-OG

WHT-BLK 116

BLK-RED 111

48
52

High:828

1

1.10

1,100 (NEO22)

MCF-C24UV -

E1

Cooling

Single phase

230V, 50Hz

6.4

3.6

840/744

W

/642

W

25

13.1

2,920

97
83

0.36

2.19

RB4V36-DA
WHT-BLK 84.0 BLK-YLW 46.2
YLW-BLU 37.3 BLU-BRN 45.2

BRN-RED 13.6

48/45W/42

W

1,320/1,190W/1,060

W

MUCF-C24UV -

E1

2,322/1,638

W

12.19

0.55

NE47VMHHT

2,200
C-R 0.67
C-S 2.02

RA6V60-AC

WHT-BLK 81 BLK-YLW 92

BLK-RED 102

61
53

873/629

W

2

1.85

1,400 (NEO22)

Electrical

data

Fan

motor

Special

remarks

Compressor

Electrical

data

Fan

motor

Special

remarks

Capacity

Coefficient of performance(C.O.P)

Capacity

MCF-C13UV -

E1

Cooling

Single phase

230V, 50Hz

3.55

1.5

678/582

W

/474

W

10

6.2

1,400

98
34

0.26

2.54

RB4V19-AB

WHT-BLK 203.2 BLK-YLW 45.9

YLW-BLU 32.7 BLU-BRN 44.4

BRN-RED 23.3

44/40

W

/34

W

1,105/970W/820

W

MUCF-C13UV -

E1

High:1,914

5.57

0.37

RE231VHSHT

1,100
C-R 2.25
C-S 4.07

RA6V33-CB

WHT-BLK 176

BLK-RED 413
780o540o255

34
49

High:725

1

0.95

620 (NEO22)

850o605o290

SPECIFICATION

NOTE:Test conditions are based on ISO 5151

Cooling : Indoor DB27°C WB19°C

Indoor-Outdoor piping length 5 m

W Reference value

Outdoor DB35°C WB(24°C)

6

4

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:\

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

High

NOTCH

44

SPL(dB

(A)) LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions,
Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

High

NOTCH

49

SPL(dB

(A)) LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

Test conditions,
Cooling : Dry-bulb tempreature 35: Wet-bulb temperature (24:)

High

NOTCH

52

SPL(dB

(A)) LINE

NOISE CRITERIA CURVES

MCF-C13UV -

E1

MUCF-C13UV -

E1

E1

NOTCH

High

SPL(dB

48

MCF-C18UV -

Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:\

90

80

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

HEARING FOR
CONTINUOUS
NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

(A)) LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

MUCF-C18UV -

7

E1

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

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

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

Test conditions,
Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)

High

NOTCH

53

SPL(dB

(A)) LINE

MCF-C24UV -

E1

SPL(dB

NOTCH

(A)) LINE

MUCF-C24UV -

E1

High

48

Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:\

90

80

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

NC-30

APPROXIMATE

20

THRESHOLD OF
HEARING FOR
CONTINUOUS

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

NOISE

10

63 125 250 500 1000 2000 4000 8000

NC-20

BAND CENTER FREQUENCIES, Hz

8

5

(When installed on the floor)

(When installed on the ceiling)

500mm or more

1000mm or more

650

616.5

80.8 906 112.8

114

16

1100

93

77

113

143

180

17042.5

[

12.7 (MCF-C13UV)

[

15.88 (MCF-C18/C24UV)

Gas line

[

6.35 (MCF-C13/C18UV)

[

9.52 (MCF-C24UV)

Liquid line

Wireless remote controller

162

19

58

REQUIRED SPACE

500mm or more

500mm or more

500mm or more

OUTLINES AND DIMENSIONS

MCF-C13UV - MCF-C18UV ­MCF-C24UV -

E1

INDOOR UNIT

E1E1

Unit: mm

MUCF-C13UV -

OUTDOOR UNIT

121

109

540

260

10

40

E1

320

15

122

500
780

REQUIRED SPACE

100mm or more

255

285

320

400mm or more

25

Service panel

43-

155

90

74

104

100mm or more

Liquid refrigerant
pipe joint

100mm or more

Refrigerant pipe
(flared) [6.35

35-

Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [12.7

350mm or more

9

350

Drainage
3holes [33

35

248

20

290

310

345

100mm or more

100mm or more

100mm or more

500mm or more

350mm or more

REQUIRED SPACE

MUCF-C18UV - MUCF-C24UV -

OUTDOOR UNIT

E1E1

30

Unit: mm

605

29220

50

133

500
850

74

157

100

161

30

35

Service panel

Liquid refrigerant

pipe joint

Refrigerant pipe

(flared)

[

6.35(MUCF-C18UV)

[

9.52(MUCF-C24UV)

Gas refrigerant

pipe joint

Refrigerant pipe

(flared)

[

15.88

10

WIRING DIAGRAM6

MCF-C13UV -

INDOOR UNIT

CIRCUIT BREAKER

POWER SUPPLY
~/N 230V
50Hz

TO OUTDOOR
UNIT
CONNECTING

230V~

REMOTE
CONTROLLER

E1

N

L

MODEL WIRING DIAGRAM

TB

GRN/YLW

PE

BLU

BRN

GRN/YLW

N

BLU

2

WHT

DISP/
RECEIVER
P.C.BOARD

AUTO RESTART
ASSY

101

CN

CN

104

5

5

CN

113

5

3
2
1

CN201

CN
151

6

5

4

MV

SW/THERMO
P.C.BOARD

HIC1

HIC1

4

52C

3

TRANS

F11

ELECTRONIC CONTROL P.C BOARD

RT11

NR11

C11

SR144
SR143
SR142

CN

112

LDCOM
LDC11
LDC12
LDFH
LDFM
LDFL

22

WHT
ORN
RED

BLK
YLW

BLU

1
2
3
4
5
6
7
8

RT12

WHT
ORN
RED
BLK
YLW
BLU
BRN

GRN/YLW

MF

SYMBOL SYMBOL SYMBOLNAME NAME NAME

C11

F11

HIC1

MF

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

MUCF-C13UV -

OUTDOOR UNIT

INDOOR FAN CAPACITOR
FUSE (3.15A)
DC/DC CONVERTER
INDOOR FAN MOTOR(INNER PROTECTOR)

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

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

E1

MODEL WIRING DIAGRAM

MV

NR11

RT11
RT12

VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR

TB

230V~

FROM
INDOOR UNIT

2

WHT

WHT WHT

N

F

BLU

CONNECTING

GRN/YLW

C2

WHT
BLU
RED

1
2
3

WHT
BLK
RED

SR142~SR144

TB

52C

C1

RED

BLK

MF

SOLID STATE RELAY
TERMINAL BLOCK
CONTACTOR

C

MC

S

R

VG79B093H02

SYMBOL SYMBOL SYMBOLNAME NAME NAME

C1

COMPRESSOR CAPACITOR

C2

OUTDOOR FAN CAPACITOR

NOTES:

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

MC TB TERMINAL BLOCK

FUSE (2A)F
COMPRESSOR (INNER PROTECTOR)

MF

OUTDOOR FAN MOTOR (INNER PROTECTOR)

11

VG79B098H02

FROM INDOOR UNIT

CONNECTING

230V~

GRN/YLW

TB

2

N

WHT

MF

MC

RED
ORN
WHT
BLK

RED

BLU

WHT

ORN
WHT
BLU

1

C2

RED

BLK

S

R

C

C1

F

2
3
4

MCF-C18UV -

INDOOR UNIT

CIRCUIT BREAKER

POWER SUPPLY
~/N 230V
50Hz

TO OUTDOOR
UNIT
CONNECTING

230V~

E1

N

L

MODEL WIRING DIAGRAM

TB

GRN/YLW

PE

BLU

BRN

GRN/YLW

N

BLU

2

WHT

101

CN

CN

104

5

5

22

CN

SR144
SR143
SR142

112

LDCOM
LDC11
LDC12
LDFH
LDFM
LDFL

WHT
ORN
RED

BLK
YLW

BLU

1
2
3
4
5
6
7
8

HIC1

HIC1

3
2
1

CN201

CN

CN

151

113

6

5

5

4

4

52C

3

TRANS

F11

ELECTRONIC CONTROL P.C BOARD

C11

NR11

RT12

WHT
ORN
RED
BLK
YLW
BLU
BRN

GRN/YLW

MF

MV

REMOTE
CONTROLLER

DISP/
RECEIVER
P.C.BOARD

AUTO RESTART
ASSY

SW/THERMO
P.C.BOARD

RT11

SYMBOL SYMBOL SYMBOLNAME NAME NAME

C11
F11

HIC1

MF

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

MUCF-C18UV -

OUTDOOR UNIT

INDOOR FAN CAPACITOR
FUSE (3.15A)
DC/DC CONVERTER
INDOOR FAN MOTOR (INNER PROTECTOR)

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

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

E1

MODEL WIRING DIAGRAM

MV

NR11

RT11
RT12

VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR

SR142~SR144

TB

52C

SOLID STATE RELAY
TERMINAL BLOCK
CONTACTOR

VG79B091H02

SYMBOL SYMBOL SYMBOLNAME NAME NAME

C1 COMPRESSOR CAPACITOR
C2

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

OUTDOOR FAN CAPACITOR

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

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

MC

FUSE (2A)F
COMPRESSOR (INNER PROTECTOR)

12

MF
TB TERMINAL BLOCK

OUTDOOR FAN MOTOR (INNER PROTECTOR)

VG79B103H02

MCF-C24UV -

INDOOR UNIT

CIRCUIT BREAKER

POWER SUPPLY
~/N 230V
50Hz

230V~

TO OUTDOOR
UNIT
CONNECTING

230V~

N

L

E1

MODEL WIRING DIAGRAM

TB

PE

GRN/YLW

BLU

BRN

GRN/YLW

2

WHT

N

BLU

3

RED

CNCN CN CN

101

5

22

CN

HIC1

3
2
1

CN201

113104

151

5

6
5

4

4

52C

3

TRANS

F11

C11

NR11

SR144
SR143
SR142

ELECTRONIC CONTROL P.C BOARD

112

LDCOM

LDC11
LDC12
LDFH
LDFM
LDFL

WHT
ORN
RED

BLK
YLW

BLU

WHT

1

ORN

2

RED

3

BLK

4

YLW

5

BLU

6

BRN

7

8

GRN/YLW

RT12

MF

MV

SW/THERMO
P.C.BOARD

RT11

REMOTE
CONTROLLER

DISP/
RECEIVER
P.C.BOARD

5

AUTO RESTART
ASSY

SYMBOL SYMBOL SYMBOLNAME NAME NAME

SOLID STATE RELAY
TERMINAL BLOCK
CONTACTOR

3

X1

GRY

5

6

1

8

X1

MC

BLU

BLK

YLW

4321

65

BLK

YLW

C

MF

WHT

WHT

ORN

ORN

C2

RED

RED

VG79B092H03

230V~

MV
NR11
RT11
RT12

TB

3

N

2

VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR

RED

BLU

A2/b

F

52C

52C

2

TB2

1

RED

A1/a

RED

WHT

RED

BLU

BLU RED

1

26F1

C1

C11
F11

HIC1

MF

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

MUCF-C24UV -

OUTDOOR UNIT

INDOOR FAN CAPACITOR
FUSE (3.15A)
DC/DC CONVERTER
INDOOR FAN MOTOR (INNER PROTECTOR)

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

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

E1

MODEL WIRING DIAGRAM

230V~

SR142~SR144

TB

52C

CR

RED

7

S

BLK

R

WHTWHT

FROM INDOOR UNIT CONNECTING

GRN/YLW

SYMBOL SYMBOL SYMBOLNAME NAME NAME

CR

C1 COMPRESSOR CAPACITOR
C2

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

CR SURGE ABSORBER

OUTDOOR FAN CAPACITOR
FUSE (2A)F

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

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

MC
MF

TB

COMPRESSOR (INNER PROTECTOR)
OUTDOOR FAN MOTOR (INNER PROTECTOR)
TERMINAL BLOCK

26F1

52C

FAN MOTOR RELAYX1
THERMOSTAT (AIRFLOW CONTROL)
COMPRESSOR CONTACTOR

TERMINAL BLOCKTB2

13

VG79B104H01

REFRIGERANT SYSTEM DIAGRAM7

INDOOR UNIT OUTDOOR UNIT

Indoor
heat
exchanger

Indoor coil
thermistor
RT12

Room
temperature
thermistor
RT11

(With heat insulation)

Refrigerant pipe

{15.88

(With heat insulation)

Refrigerant pipe
{6.35

Flared

connection

Stop valve
(with service port)

Stop valve

Compressor

Strainer

Capillary tube

{4.0

✕

{2.4✕1200

Outdoor

heat

exchanger

Distributor

Refrigerant flow

INDOOR UNIT OUTDOOR UNIT

Indoor
heat
exchanger

Indoor coil
thermistor
RT12

Distributor

Room
temperature
thermistor
RT11

(With heat insulation)

Refrigerant pipe

[12.7

(With heat insulation)

Refrigerant pipe

[6.35

Flared

connection

Stop valve
(with service port)

Stop valve

Compressor

Strainer

Refrigerant flow

Capillary tube

[3.0✕[1.6✕600

Outdoor

heat

exchanger

Unit:mm

MCF-C13UV -

E1

MUCF-C13UV -

E1

MCF-C18UV -

E1

14

MUCF-C18UV -

E1

INDOOR UNIT OUTDOOR UNIT

Indoor
heat
exchanger

Indoor coil
thermistor
RT12

Distributor

Room
temperature
thermistor
RT11

(With heat insulation)

Refrigerant pipe
{15.88

(With heat insulation)

Refrigerant pipe
{9.52

Flared

connection

Stop valve
(with service port)

Stop valve

Compressor

Strainer

Capillary tube

Outdoor

heat

exchanger

Refrigerant flow

[4.0✕[2.4✕1100

If pipe length exceeds 7m, additional refrigerant (R407C) charge is required.

MCF-C13UV -

E1

MCF-C18UV -

E1

MCF-C24UV -

E1

950
1,100
1,850

7m

0
0
0

8m

15
20
20

9m

30
40
40

10m

45
60
60

11m

60
80
80

12m

75
100
100

13m

90
120
120

14m

105
140
140

15m

120
160
160

Refrigerant piping length (one way)

Outdoor unit
precharged

Model

MCF-C24UV -

E1

REFRIGERANT PIPING MAX. LENGTH & MAX. HEIGHT DIFFERENCE

Unit:mm

MUCF-C24UV -

E1

Refrigerant piping

Model

MCF-C13UV ­MCF-C18UV ­MCF-C24UV -

E1

E1

E1

Outdoor unit

Max. length : m

A

15

*Height difference should be within

5m regardless of which unit,
indoor or outdoor position is high.

Gas Liquid

{12.7

{15.88

Indoor unit

A: Refrigerant piping
Max. length
15m

ADDITIONAL REFRIGERANT CHARGE (R407C : g)

Piping size O.D. : mm

5m

Max. Height

difference *

{6.35
{9.52

Calculation : MCF-C13UV ✕g=15g/m✕(Refrigerant piping length (m)-7)

MCF-C18/C24UV ✕g=20g/m✕(Refrigerant piping length (m)-7)

15