Friedrich Metal Products MR18C3F Service Manual

SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTED TYPE

Indoor unit Outdoor unit

MW18C3F MR18C3F

CONTENTS

SPECIFICATIONS

OUTLINE AND DIMENSIONS

REFRIGERANT SYSTEM DIAGRAM

CIRCUIT DIAGRAM

INDOOR PCB CIRCUIT DIAGRAM 5

OUTDOOR PCB CIRCUIT DIAGRAM 8

ERROR CONTENTS

DISASSEMBLY ILLUSTRATION

PARTS LIST

ACCESSORIES

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10

11

14

16

1

2

3

4

SPECIFICATIONS

TYPE

INDOOR UNIT

OUTDOOR UNIT

COOLING CAPACITY

ELECTRICAL DATA

POWER SOURCE

FREQUENCY

RUNNING CURRENT

INPUT WATTS

E.E.R.

MOISTURE REMOVAL

AIR CIRCULATION -High

COMPRESSOR

TYPE

DISCRIMINATION

REFRIGERANT

R410A

COOLING ONLY INVERTER

MW18C3F

MR18C3F

18,000 Btu/h (5.28 kW)

208 - 230 V

60 Hz

7.7 A

1.73 kW

3.05 kW /kW

5.9 Pt/h (2.8 L/hr)

412 cfm (700 m3/hr)

Hermetic type, 4 pole, 3 phase,
DC inverter motor, Rotary

DA130A1F-25F

2-9/16 lbs. (1,150 g)

FAN MOTOR

POWER SOURCE

INDOOR UNIT

OUTDOOR UNIT

DIMENSIONS

INDOOR UNIT

OUTDOOR UNIT

WEIGHT

INDOOR UNIT

OUTDOOR UNIT

NOISE LEVEL

INDOOR UNIT

OUTDOOR UNIT

HIGH-SPEED

MED-SPEED

LOW-SPEED

QUIET

HxWxD

HxWxD

Gross / Net

Gross / Net

HIGH

MED

LOW

QUIET

208 - 230 V

1,480 r.p.m.

1,260 r.p.m.

1,040 r.p.m.

850 r.p.m.

860 r.p.m.

10-13/16 x 31-1/8 x 8-7/16 inch

275 x 790 x 215 mm

22-3/4 x 31-1/8 x 11-13/16 inch

578 x 790 x 300 mm

26 lbs. / 20 lbs. (12 kg / 9 kg)

97 lbs. / 88 lbs. (44 kg / 40 kg)

44 dB

38 dB

32 dB

25 dB

50 dB

REFRIGERANT (R410A)

Pipe Length

FULL CHARGE

ADDITIONAL REFRIGERANT

2006.03.06 1

49 ft. (15 m)

66 ft. (20 m)

2-9/16 lbs. (1,150 g)

2-3/4 lbs. (1,250 g)

3/16 oz./ft. (20 g/m)

DIMENSIONS

Models : MW18C3F / MR18C3F

unit : inch (mm)

10-13/16 (275)

31-1/8 (790)

8-7/16

(215)

13-11/16 (347)

1-7/8 (48)

21-1/4 (540)

31-1/8 (790)

20 (508)

13/16 (20)

12-5/8 (320)

4-15/16 (125)

2-5/8
(66)

11-13/16

(300)

22-3/4 (578)

3/8 (10)

2006.03.06 2

REFRIGERANT SYSTEM DIAGRAM

Model : MW18C3F / MR18C3F

Heat exchanger

3-Way valve

Muffler

Compressor

( INDOOR )

2-Way valve

Sub-heat

exchanger

( INDOOR )

Strainer

Sub-accumulator

Cooling

Refrigerant pipe diameter
Liquid : 1/4" (6.35 mm)
Gas : 1/2" (12.7 mm)

4-Way valve

Heat exchanger

( OUTDOOR )

Expansion valve

Strainer

2006.02.28 3

CIRCUIT DIAGRAM

Model :
MW18C3F / MR18C3F

INDOOR UNIT

OUTDOOR UNIT

CN201

1

WHITE

2

WHITE

3

WHITE

4

WHITE

5

WHITE

6

WHITE

777

INDICATOR PCB ASSY

BLUE

YELLOW

WHITE
BLACK

FM

FAN MOTO R

GRAY

3
2

GRAY

1

THERMAL FUSE

102

TERMINAL

RED

1

1

2

2

3

3

4

4

CN3

5

5

6

6

1

1

2

2

3

3

4

4

CN1

5

5

RED

6

6

SW

POWER CIRCUIT

3
2

CN7

W1

WHITE

VARISTOR

W2

BLACK

1

CONTROLLER PCB ASSY

FUSE

3.15A

W3

RED

321

1
2
3

CN10

4
5

1
2
3
4
5

1
2

1
2

CN5 CN6 CN2

G

RED

1

ORANGE

2

YELLOW

3

PINK

4

BLUE

5

BLACK
BLACK

PIPE TEMPERATURE
THERMISTOR

BLACK
BLACK

ROOM TEMPERATURE
THERMISTOR

GREEN /

YELLOW

1

1

2

2

3

3

4

4

5

5

STEP MOTOR

M

REACTOR

YELLOW

YELLOW

2

1

2

1

WHITE

PIPE TEMP.THERMISTOR

BLACK

BLACK
BROWN
BROWN

DISCHARGE PIPE TEMP. THERMISTOR

OUTDOOR TEMP. THERMISTOR

WHITE

FUSE

BLACK

BLACK

RED

WHITE

5A-250V

FUSE 20A-250V

BLACK

BLACK

BLACK

W10

RED

W11

1

1

2

2

CN71

3

3

4

4

CONTROLLER PCB ASSY

1

1

2

2

CN70

3

3

W4

W2

BLACK

W1

W3

GREEN

TO OUTDOOR UNIT

W7
W8
W9

1

1

2

2

3

CN801

CN40

CN30

3

4

4

5

5

6

6

1

1

2

2

3

3

4

4

5

5

6

6

1

1

2

2

3

3

RED
WHITE
BLACK

RED

BLACK
WHITE
YELLOW
BLUE

RED
BROWN
BLUE
ORANGE
YELLOW
WHITE

BLACK

BLACK

RED

1

1

2

2

3

3

R(R)

WHITE

BLACK

CM

S(S)

FM

FAN MOTOR

EV

EXPANSION VALVE

4-WAY VALVE

4WV

COMPRESSOR

C(T)

TERMINAL

1

L1 L23

2

G

TO INDOOR UNIT

POWER SUPPLY

2006.02.28 4

1

CN201

JB20-07HG

INDICATOR PCB ASSY

2

K02CB-0300HSE-D0

76543

LOUVER

M

TERMINAL BOARD

EZ-005EWSE

CONTROL UNIT

PIPE TEMPERATURE THERMISTOR

ROOM TEMPERATURE THERMISTOR

EXTERNAL COMMUNICATION CONNECTOR

CN3-7 WHITE

CN3-2 WHITE

CN3-5 WHITE

CN3-1 RED

CN3-4 WHITE

CN3-8 WHITE

EX-OUT

EX-I N

CN12

CN11

2

1

B2B-XH

W1

WHITE

W2

BLACK

W3

RED

3

L

N

EARTH

TERMINAL

3

1

CN7

L

N

SERIAL

EARTH

B3B-XASK

103

1

B3B-XH

3

CN10

B5B-XASK

1

CN10-1 RED

2

WHITE

CN10-2

543

CN10-3 BLACK

ZHR-07

CN3

1

S7B-ZR-3.4

K04CP-0504WSE-C1

CONTROLLER PCB ASSY

CN3-9 WHITE

76543

2

CN6

2P-SCN

2

1

CN8

BS5P-SHF-1AA

CN3-2

CN3-1

CN3-1 BLACK

1

CN3-3

TEST

CN3-2 BLACK

2

CN3-4

543

CN3-5

CN5

2P-SAN

CN2-1 BLACK

1

CN2-2 BLACK

2

CN1

CN2

53325-0510

6

S5 (6-5) B-XARK

CN4-6 RED

CN7-1 RED

CN7-2 ORANGE

CN7-3 YELLOW

CN7-4 PINK

CN7-5 BLUE

543

2

1

234

5

1

CN4-4 BLACK

CN4-3 WHITE

CN4-2 YELLOW

CN4-1 BLUE

OUTDOOR UNIT

TERMINAL FUSE

F. M .

INDOOR PCB CIRCUIT DIAGRAM

Model : MW18C3F

REMOTE CONTROL UNIT

FAN MOTOR

2006.02.28 5