Friedrich M18CF Service Manual
SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTED
Models
Indoor unit Outdoor unit
MW18C3F MR18C3F
type
CONTENTS
SPECIFICATIONS ......................1
OUTLINE AND DIMENSIONS............2
REFRIGERANT SYSTEM DIAGRAM ......3
CIRCUIT DIAGRAM ....................4
INDOOR PCB CIRCUIT DIAGRAM 5
OUTDOOR PCB CIRCUIT DIAGRAM 8
ERROR CONTENTS ..................
DISASSEMBLY ILLUSTRATION .........11
PARTS LIST .........................14
STANDARD ACCESSORIES ............16
.......
.....
10
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
CN201
1
WHITE
2
WHITE
3
WHITE
4
WHITE
5
WHITE
6
WHITE
777
INDICATOR PCB ASSY
BLUE
YELLOW
WHITE
BLACK
FM
FAN M OTO R
GRAY
3
2
GRAY
1
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
1
VARISTOR
CONTROLLER PCB ASSY
FUSE
3.15A
1
2
3
CN10
4
5
1
2
3
4
5
1
2
1
2
CN5 CN6 CN2
RED
1
ORANGE
2
YELLOW
3
PINK
4
BLUE
5
BLACK
BLACK
PIPE TEMPERATURE
THERMISTOR
BLACK
BLACK
ROOM TEMPERATURE
THERMISTOR
1
1
2
2
3
3
4
4
5
5
STEP MOTOR
M
OUTDOOR UNIT
REACTOR
YELLOW
YELLOW
2
1
2
1
WHITE
PIPE TEMP. THERMISTOR
DISCHARGE PIPE TEMP. THERMISTOR
OUTDOOR TEMP. THERMISTOR
WHITE
FUSE
5A-250V
FUSE 20A-250V
BLACK
BLACK
BLACK
BLACK
BLACK
BROWN
BROWN
BLACK
BLACK
RED
WHITE
RED
BLACK
GREEN
W1
THERMAL FUSE
102
TERMINAL
TO OUTDOOR UNIT
W10
W11
1
1
2
2
CN71
3
3
4
4
CONTROLLER PCB ASSY
1
1
2
2
CN70
3
3
W4
W2
W1
W3
WHITE
CN801
CN40
CN30
W2
W3
RED
BLACK
G
321
GREEN /
YELLOW
RED
W7
W8
W9
RED
WHITE
BLACK
RED
1
1
2
2
BLACK
3
3
WHITE
4
4
YELLOW
5
5
BLUE
6
6
RED
1
1
BROWN
2
2
BLUE
3
3
ORANGE
4
4
YELLOW
5
5
WHITE
6
6
BLACK
1
1
2
2
BLACK
3
3
1
1
2
2
3
3
WHITE
BLACK
FM
EV
4WV
R(R)
COMPRESSOR
CM
S(S)
C(T)
FAN MOTOR
EXPANSION VALVE
4-WAY VALVE
TERMINAL
TO INDOOR UNIT
1
3
2
(L)
POWER SUPPLY
(N)
G
5
4
2006.02.28 4
INDOOR PCB CIRCUIT DIAGRAM
Model : MW18C3F
REMOTE CONTROL UNIT
OUTDOOR UNIT
TERMINAL FUSE
103
CN10-1 RED
CN10-2
WHITE
CN10-3 BLACK
N
L
SERIAL
EARTH
CN7
B3B-XASK
1
3
CN10
B5B-XASK
1
2
3
4
5
CONTROL UNIT
EZ-005EWSE
TERMINAL BOARD
N
L
3
EARTH
TERMINAL
W3
RED
W2
BLACK
W1
WHITE
CN11
B2B-XH
1
2
CN12
B3B-XH
1
3
EX-OUT
EXTERNAL COMMUNICATION CONNECTOR
EX-I N
FAN MOTOR
F. M.
TEST
CN4-6 RED
CN4-4 BLACK
CN4-3 WHITE
CN4-2 YELLOW
CN4-1 BLUE
CN3-1
CN3-2
CN3-3
CN3-4
CN3-5
CN8
BS5P-SHF-1AA
1
2
3
4
5
CN1
S5 (6-5) B-XARK
6
5
4
3
2
1
CONTROLLER PCB ASSY
K04CP-0504WSE-C1
CN3
S7B-ZR-3.4
1
2
3
4
5
6
7
CN6
2P-SCN
CN5
2P-SAN
1
2
CN2
53325-0510
1
2
3
4
5
1
2
ZHR-07
CN3-1 RED
CN3-2 WHITE
CN3-4 WHITE
CN3-5 WHITE
CN3-7 WHITE
CN3-8 WHITE
CN3-9 WHITE
CN3-1 BLACK
CN3-2 BLACK
CN2-1 BLACK
CN2-2 BLACK
CN7-1 RED
CN7-2 ORANGE
CN7-3 YELLOW
CN7-4 PINK
CN7-5 BLUE
CN201
JB20-07HG
1
2
3
4
INDICATOR PCB ASSY
5
K02CB-0300HSE-D0
6
7
PIPE TEMPERATURE THERMISTOR
ROOM TEMPERATURE THERMISTOR
M
LOUVER
2006.02.28 5
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