Friedrich MW18Y3F User manual

SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTED type
ERROR CONTENTS ..................
Models
Indoor unit Outdoor unit
MW18Y3F MR18Y3F
CONTENTS
SPECIFICATIONS ..................... 1
OUTLINE AND DIMENSIONS ........... 2
STANDARD ACCESSORIES ........... 16
REFRIGERANT SYSTEM DIAGRAM ..... 3
CIRCUIT DIAGRAM ................... 4
INDOOR PCB CIRCUIT DIAGRAM 5
OUTDOOR PCB CIRCUIT DIAGRAM 8
10
....
......
DISASSEMBLY ILLUSTRATION ........ 11
PARTS LIST ........................ 14

INDOOR UNIT
HxWxD
10-13/16 x 31-1/8 x 8-7/16 inch
578 x 790 x 300 mm
DIMENSIONS
INDOOR UNIT
GROSS / NET
GROSS / NET
26 / 20 lbs. (12 / 9 kg)
OUTDOOR UNIT 97 / 88 lbs. (44 / 40 kg)
WEIGHT
SPECIFICATIONS
TYPE
COOL & HEAT INVERTER
INDOOR UNIT
MW18Y3F
OUTDOOR UNIT
MR18Y3F
COOLING CAPACITY
18,000 Btu/h (5.28 kW)
HEATING CAPACITY
21,600 Btu/h (6.30 kW)
POWER SOURCE
208 - 230 V
FREQUENCY
60 Hz
RUNNING CURRENT COOLING
7.7 A
HEATING
8.6 A
INPUT WATTS COOLING
1.73 kW
HEATING
1.93 kW
E.E.R. COOLING
3.05 kW/kW
COP HEATING
3.28 kW/kW
MOISTURE REMOVAL
5.9 Pt/h (2.8 L/hr)
AIR CIRCULATION -High
412 cfm (700 m3/hr)
FAN MOTOR
TYPE Hermetic type, 4 pole, 3 phase,
DC inverter motor, Rotary
DISCRIMINATION DA130A1F-25F
REFRIGERANT R410A 2 lb.9 oz (1,150 g)
POWER SOURCE
208 - 230 V
HIGH-SPEED Cool 1,480 r.p.m. Heat 1,480 r.p.m.
INDOOR UNIT
MED-SPEED Cool 1,260 r.p.m. Heat 1,300 r.p.m.
LOW-SPEED Cool 1,040 r.p.m. Heat 1,110 r.p.m.
QUIET Cool 850 r.p.m. Heat 950 r.p.m.
OUTDOOR UNIT
Cool 860 r.p.m. Heat 820 r.p.m.
ELECTRICAL DATA
COMPRESSOR
INDOOR UNIT C44dB H42dB
OUTDOOR UNIT C50dB H50dB
NOISE LEVEL
REFRIGERANT (R410A)
Pipe Length 49 ft. (15 m) 2 lb 9 oz (1,150 g)
FULL CHARGE
66 ft. (20 m) 2 lb 12 oz (1,250 g)
ADDITIONAL REFRIGERANT
3/16 oz./ft. (20g/m)
HxWxD
22-3/4 x 31-1/8 x 11-13/16 inch
OUTDOOR UNIT 578 x 790 x 300 mm
2006.03.06 1

DIMENSIONS
Models : MW18Y3F / MR18Y3F
unit : inch (mm)
2006.03.03 2
10-13/16 (275)
31-1/8 (790)
8-7/16
(215)
13-11/16 (347)
22-3/4 (578)
1-7/8 (48)
3/8 (10)
12-5/8 (320)
20 (508)
21-1/4 (540)
13/16 (20)
11-13/16
(300)
4-15/16 (125)
2-5/8
(66)
31-1/8 (790)

REFRIGERANT SYSTEM DIAGRAM
2-Way
valve
Strainer
Strainer
Sub-heat
exchanger
( INDOOR )
3-Way
valve
Muffler
4-Way valve
Expansion valve
Heat exchanger
( INDOOR )
Heat exchanger
( OUTDOOR )
Sub-accumulator
Compressor
Cooling
Heating
Refrigerant pipe diameter
Liquid : 1/4" (6.35 mm)
Gas : 1/2" (12.7 mm)
Models : MW18Y3F / MR18Y3F
2006.03.02 3

CIRCUIT DIAGRAM
INDOOR UNIT
OUTDOOR UNIT
Models :
MW18Y3F / MR18Y3F
RED
WHITE
BLACK
RED
WHITE
BLACK
RED
BLACK
WHITE
YELLOW
BLUE
RED
BROWN
BLUE
ORANGE
YELLOW
WHITE
BLACK
BLACK
WHITE
RED
YELLOW YELLOW
BLACK
BLACK
BROWN
BROWN
BLACK
BLACK
WHITE
WHITE
RED
BLACK
BLACK
BLACK BLACK
GREEN
CN71
W10
W11
W7
W9
W8
CN801
W4
W2
W1
W3
CN40
CN30
CN70 1
5
4
3
2
6
1
5
4
3
2
6
1
5
4
3
2
6
1
5
4
3
2
1
3
2
1
3
2
6
1
4
3
2
1
4
3
2
1
3
2
1
3
2
1
3
2
1
3
2
2
21
1
5
(N)
4
(L)
3
2
1
FUSE
5A-250V
TO INDOOR UNIT POWER SUPPLY
G
TERMINAL
FUSE 20A-250V
PIPE TEMP. THERMISTOR
DISCHARGE PIPE TEMP. THERMISTOR
OUTDOOR TEMP. THERMISTOR
REACTOR
FAN MOTOR
COMPRESSOR
EXPANSION VALVE
4-WAY VALVE
4WV
EV
FM
CM
S(S)
C(T)
R(R)
CONTROLLER PCB ASSY
ORANGE
RED
YELLOW
PINK
BLUE
BLACK
BLACK
BLACK
BLACK
YELLOW
BLUE
WHITE
BLACK
RED
RED
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
GRAY
GRAY
WHITE
BLACK
RED
GREEN /
YELLOW
G
321
1
6
5
4
3
2
1
6
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
777
1
2
1
2
1
3
2
1
3
2
CN1
CN7
CN5 CN6 CN2
CN3
CN10
CN201
W1
W3
W2
THERMAL FUSE
102
TERMINAL
TO OUTDOOR UNIT
VARISTOR
FUSE
3.15A
FAN MOTOR
STEP MOTOR
PIPE TEMPERATURE
THERMISTOR
ROOM TEMPERATURE
THERMISTOR
SW
POWER CIRCUIT
FM
M
CONTROLLER PCB ASSY
INDICATOR PCB ASSY
2006.03.02 4

CN6
2P-SCN
REMOTE CONTROL UNIT
CONTROLLER PCB ASSY
K04CP-0504WSE-C1
CONTROL UNIT
EZ-0051FHSE
INDOOR PCB CIRCUIT DIAGRAM
Model : MW18Y3F
2006.02.20 5
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
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
CN10-2 WHITE
CN10-1 RED
CN10-3 BLACK
CN3-2 WHITE
CN3-1 RED
CN3-4 WHITE
CN3-5 WHITE
CN3-7 WHITE
CN3-8 WHITE
CN3-9 WHITE
1
7
6
5
4
3
2
1
7
6
5
4
3
2
1
5
4
3
2
1
5
4
3
2
6
2
3
4
5
1
1
3
1
3
1
2
CN11
B2B-XH
W1
WHITE
W2
BLACK
W3
RED
CN12
B3B-XH
1
5
4
3
2
1
2
1
2
CN5
2P-SAN
CN2
53325-0510
CN3
S7B-ZR-3.4 ZHR-07
CN7
B3B-XASK
CN10
B5B-XASK
CN8
BS5P-SHF-1AA
TEST
CN1
S5 (6-5) B-XARK
FAN MOTOR LOUVER
PIPE TEMPERATURE THERMISTOR
ROOM TEMPERATURE THERMISTOR
CONTROLLER PCB ASSY
INDICATOR PCB ASSY
CN201
JB20-07HG
EX-OUT
EX-I N
OUTDOOR UNIT
TERMINAL BOARD
TERMINAL FUSE
103
N
L
SERIAL
EARTH EARTH
TERMINAL
N
L
3
F. M. M
EXTERNAL COMMUNICATION CONNECTOR
K02CB-0300HSE-D0
K04CP-0500HSE-C1

VA1 270V
<TNR>
VA2 270V
<TNR>
F1
3.15A - 250V
W2
BLACK
W1
WHITE
W3
RED
W4
GREEN
GND
TERMINAL BOARD
3N L
C3
0.22
<LE>
1
1
5
7
8
4
4
3
2
1
610
7
5
4
1
2
2
3
2
4
3
L1
D1
R2 2.2
<RGG-5W>
160V
5V
5V
20V
++
+
C5
100/
420V
D2
1NH42 D3
D1FL20U
R4 100K
<RS - 2W>
R41 10K
<1/10W>
(1%)
R42 49.9K
<1/10W>
(1%)
R43 1K
<1/10W>
R44 1K
<1/10W> R39 10K
<1/10W> R28 10K
<1/10W>
R29 10K
<1/10W>
C7 0.01
<ECQE>
C11 0.01
<F>
IC5
TNY266P
R5 2.0M <1/2W>
R7 18K <1/10W>
D4 D2FL20U
C13 330 / 25V
EN/UV
D
S
S
S
S
BP
C10
100/
35V
C6
0.1
<F> C12
4700P
<E>
C15
0.01
<B>
C45
0.1
<F>
C46
0.1
<F>
T1
ETS19AB1P8AG
CN5
1
1
2
2
ROOM TEMPERATURE
THERMISTOR
HEAT EXCHANGER
THERMISTOR
13.5V
C
A
REF
IC8
TL431 I LP
IC11
PS2501L-1
<KD / KE>
R9
8.25K
<1/10W>
(1%)
R11
1K
<1/10W>
R8
34K
<1/10W>
(1%)
R10
47K
<1/10W>
A
A
1
2
4
3
A
18
14
10
5
4
3
2
1
IC10
8
7
6
5
4
3
3
3
2
2
2
1
1
1
5V
D7
DAN202K
20V 15V
R3 1K
<1/2W>
IC7
78M15
C16
0.1
<F>
C18
0.1
<F>
C17
330/
25V
+
1
2
3
IGO
R27 390
<1/10W>
C34
0.01
<B>
C33
0.01
<B>
5V
Q2
DTC124EUA
Q1
DTC124EUA
R25 10K
<1/10W> R26 390
<1/10W>
13.5V 12V 5V 5V
5V 5V
5V
CN7
B3B-XASK
112
2
33
+++
IG
O
D6
D1F60
C19
330/
25V
IC6
NJM7805
2
1
3
4
5
VDD NC
NC
VOUT
GND
IC2
BD4842
C20
0.1
<F>
C24
0.1
<F>
C26
0.1
<F>
C25
0.1
<F>
C23
10/
25V
C22
330/
25V
IC1
UPD780058
REM
WIR
61
62
63
64
65
66
73
72
76
77
78
79
80
60
27
28
29
30
31
32
34
35
1
2
3
11
12
13
14
36
37
38
39
40
41
42
15 43
16
17
18
44
45
46
47
48
8
9
10
52
53
54
55
56
49
50
51
19
20
21
22
57
58
59
5
6
71
70
23
24
25
26
69
4
67
33
74
68
75
7
P00
P01
P02
P03
P04
VDD0
VDD1
AVRF0
AVRF1
RST
P05
XT1
XT2
P10
P11
P12
P13
P14
P15
P16
P17
P50
P51
P52
P53
P54
P55
P56
P57
P60
P61
P62
P20
P21
P22
P23
P24
P25
P26
P27
P63
P64
P65
P66
P67
P70
P71
P72
P30
P31
P32
P33
P34
P35
P36
P37
P40
P41
P120
P121
P122
P123
P124
P125
P126
P127
P130
P131
P42
P43
P44
P45
P46
P47
IC
X1
X2
AGND
GND0
GND1
RXD
TXD
VPP
1 3
2
X1
5.00MHz
<CSTS>
5V
5V
R21 1K
<1/10W>
R22
10K
<1/10W>
R24 10K
<1/10W>
C27
0.1
<F>
IC3
8
4
6
5
1
2
3
7
VCC
D0
TEST
GND
CS
SK
D1
NC
12V
BZ
R38 10K
<1/10W>
BZ1
PKM13EPY-4000
IC4-6 LN2003
11 6
RXD
TXD
VPP
R23
5V
R80
R81 R82 R83 10K <1/10W> x4
330 <1/10W> x6
R84
R85
R86
R87
R89
5V
R15 R20
R16 R17
R18
R19
10K <1/10W> x6
5V
JM7
JM6
JM5
JM4
JM3
JM2
R37
R36
R35
R34
330 <1/10W> x4
5V
R33 R30
R32R31
10K <1/10W> x4
1
2
3
4
5
CN8
BS5P-SHF
TIMER SHORT CIRCUIT
CLOCK
DO
DI
TEST
IC13
PS2501L-1
<KD / KE>
IC12
PS2501L-1
<KD / KE>
1
2
3
R50 330
<1/10W>
R53 1K
<1/10W>
R54 10K
<1/10W>
R56 6.8K
<1/4W>
R55 4.7K
<1/10W>
Q6
DTC124EUA
5V 15V
15V
5V
C50
1000P
<R>
C62
0.1
<F>
1
2
4
3
4
3
1
2
R51 1K
<1/4W>
(1%)
R66 390
<1/4W>
(1%)
R65 10K
<1/10W> R64 28K
<1/10W>
(1%)
R63 15.4K
<1/10W>
(1%)
R68 1K
<1/10W>
R62 10K
<1/10W>
R67 10K
<1/10W>
R52 820
<1/4W>
(1%) AA
+
C53
100 / 16V
DC FAN MOTOR
CN1
S5 (6-5) B-XARK
CN2
53325-0510
CN10
B5B-XASK
15V
160V
D50
RD27M
<B> A
123456
IC4-4 LN2003
IC4-5 LN2003
IC4-3 LN2003
IC4-2 LN2003
IC4-1 LN2003
4
3
2
1
13
14
15
16
12V
5432 1
512
5V
JP5
D61
DAN217U
D60
D1F60
12V
12V
12V
12V
12V
IC9
8
4
12V
IC4
9
8
WIR
5V
IC9-2
BA10393F
IC9-1
BA10393F
76
5
-
+
12
3
-
+
54321
RED
WHITE
BLACK
REM C60
1000P
<R>
C81
0.01
<B>
C80
100 / 16V
R61 10K
<1/10W> R60 47
<1/10W>
5V
+
765 43 21
CN3
S7B-ZR-3.4
MANUAL AUTO
SWITCH
(KSM0632B)
LOUVER
ROOM TEMPERATURE
CORRECTION 1
ROOM TEMPERATURE
CORRECTION 2
AUTO RESTART
HOME AUTOMATION
CUSTOM CODE 2
CUSTOM CODE 1
CONTROLLER PCB ASSEMBLY
K04CP-0500HSE-C1
Model : MW18Y3F
C35 0.1 <F>
C36 0.1 <F>
C37 0.01 <B>
C38 0.1 <F>
CN6
C29 10K
C30 1000P <R>
C31 1000P <R>
IC4-7 LN2003
512
JP SETTING
REMOTE
CONTROL
UNIT
INDICATOR PCB
JP2 JP3JP4
JP1
R6 100K
<1/10W>
2006.02.20 6

72006.02.20
+
5V
C201
0.1
<F>
R201
47
<1/4W>
C202
47/
10V
I C201
GP1UM261R
5V5V
CN201
1
1
1
1
2
2
2
2
2
1
3
VCC
OUT
GND
D206 SLR-325
D204 SLR-325
D203 SLR-325
D201 SLR-325
1
6
8
7
5
4
3
2
9
INDICATOR PCB ASSY
K03DV-0400WSE-D0
Model : MW18Y3F

Model : MR18Y3F
2006.02.20 8
INVERTER ASSEMBLY
EZ-005SHUE
OUTDOOR PCB CIRCUIT DIAGRAM
TO
INDOOR
UNIT
F201
20A-250V
F202
5A-250V
UL1015 AWG14
W101 BLACK
UL1015 AWG20
W102 BLACK
UL1015 AWG20
W103 BLACK
UL1015 AWG20
W100 WHITE
TERMINAL
UL1015 AWG14
BLACK
UL1015 AWG14
WHITE
UL1015 AWG20
RED
UL1015 AWG16
GREEN
W1
( A-1 )
W2
( B-1 )
W4
( D-1 )
W3
( C-1 )
B
B
B
B
BB
W10 W11
W7
W9
W8
B
B
B
UL3271 AWG16
BLACK
UL3271 AWG14
WHITE
UL3271 AWG14
RED
UL3271 AWG16
RED
UL3271 AWG16
WHITE
EMI FILTER
U
V
W
BLACK
BLACK
RED
BLACK
WHITE
YELLOW
YELLOW
BROWN
WHITE
ORANGE
BLUE
BROWN
RED
1
6
5
4
3
2
1
6
5
4
3
2
1
3
2
BLACK
WHITE
RED
CN30
B2P3-VH-B-C
BLACK
CN801
B5P6-VH-B-L
WHITE
CN40
B6B-XARK-1-A
RED
CN71
B04B-PASK-1
WHITE
CN70
B03B-PASK-1
WHITE
1
4
3
2
1
3
2
BLACK
BLACK
BLACK
BLACK
BROWN
BROWN
DISCHARGE TEMPERATURE THERMISTOR
PIPE TEMPERATURE THERMISTOR
OUTDOOR TEMPERATURE THERMISTOR
N
L
SERIAL
1
2
3
4
5
AC208-230V
60Hz
REACTOR
EXPANTION VALVE
DC FAN MOTOR
4-WAY VALVE
COMPRESSOR
A
C. M.
F. M.
M
CONTROLLER PCB ASSY
K05CM-0507HUE-C1

PFC5000-0702F
PFC5000
-0702F
C1
0.1/
275V
C6
3.3/275V
C4
0.01/250V
C5
0.01/250V
L1
RCH4716-070PF07
LL25XB60 x 2
D100
D101
AOUS09LAC
AOUS12LAC
15V
L300
ELC0607RA
C209 0.1 <F>
+
C210 0.1 <F>
C211 0.1 <F>
C212 0.1 <F>
C221 0.1 <F>
C222 1.0 <B> D203 MTZJ T-77 24B C220 47 / 35V
W7 W8 W9
I C200
FSBS20CH60
C214
2200P
<B>
R210 1.0K
DC V
UVW
WVU
R307 195K
<RN-1/2W>
R308 195K
<RN-1/2W>
15V
5V
5V
5V
5V
-12V
5V
C213
0.022
<F>
C219
1000P
<B>
5V
5V
R339
10K R334
10K
1%
R220
1.0K
C320
0.15
<ECQB>
R336
10K
1%
R335
10K
1%
R333
10K
1%
D304
DAN217U
D303
DAN217U
C86
470P
<B>
C84
0.1 <F>
C206-C208 C215-C217
2200P <B> x 6
195K <RN-1/2W> 1% x 6
R306 R305
R304 R303
R301R302
U / 50P
V / 52P
W / 54P
X / 51P
Y / 53P
Z / 55P
I PM-TRIP / 33P
I PM-G
I PM-G
I PM-G
I PM-G
POW_GND
P63 VCC
17
16
2
35
3
59
58
60
21
34
47
27
28
29
30
31
32
33
57
41
42
43
44
10
9
8
7
5
648
19
1
61
62
63
64
20
18
15
14
55
54
53
52
51
50
46
45
12
39
38
37
36
40
26
25
11
56
P62
P46
P12
P50
P37
P36
P40
MD2
P11
P26
P02
P03
P04
P05
P06
P07
P10
C
P20
P21
P22
P23
P57
P56
P55
P54
P52
P53
AVCC
P00
P01
P17
P13
P14
P15
P16
AVR
P24
P25
P30
P31
P32
P33
P34
P35
P60
P61
MD0
MD1
P44
P43
P42
P41
P45
RSTX
P27
15V DCV-F
T60
RPZ-1F
1
5
4
3
2
10
9
8
7
6
+C64
330/
25V
D60
D1FL20U
D61
D1FL20U
D62
D1FL20U
D63
1SS355 +C65
470/
25V
12V
5V
+C68
100/
25V
C67
0.1
<F>
R61
1.0K
-12V
+C69
100/
25V
D64
1SS355
1
2
3
IO
G
I C60
BA7805
+
C66
100/
25V
I C50
TOP243P
1
2
3
45
7
8
M
S
S
S
S
CD
+
R51
47
C50
47/
35V
C300
100P
<CH>
R83 27K
<1/10W>
R81
1.0K
<1/16W>
+
I C302-2
BA2903F
C85
10/
25V
15V
-
+
2
31
12
13 14
+
-
15V
-12V
C115
0.1
<F>
C116
0.1
<F>
5V
R135
10K
1%
R504 10K
<1/10W>
I C500
MB90460
JM501
R500
10K
R502
1.0K JM500
R503
10K
C51
1.0
<B>
D53
UF4005
R57
0R0
C52
2200P
<E>
R56
150K
<2W>
R52
470K
<1/8W>
1%
R53
510K
<1/8W>
x3
R54
R55
L51
D52
1SS355
D50
1SS355
D51
UDZS8.2B
-6
5
7
33
21 21
7+5
6
3
2
1
+
-
-
C306
0.1
<F>
C305
0.1
<F>
C330
1000P
<B>
I C300-2
BA4560
R332
4.7K
1%
R329 47K 1% R330
4.7K
1%
I C300-1
BA4560
R331
47K 1%
D302 RB751V
R328
1.0K
C311
1000P
<B>
R327
22K
D301
DAN217U
1
2
3
3
1
21
2
3
+
-
R338
1%
I C302-1
BA2903F
Q300
DTC114EUA
C339
0.01
<F>
R337
100K 1%
C87
330P <B>
15V
R311
8.66K
1%
R309
5.76K
1%
R310
143
1%
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
121
22
23
24
25
26
27
VCC
COM
IN
IN
IN
VFO
CFOD
CSC
IN
VCC
VB
VS
IN
VCC
VB
VS
IN
VCC
VB
VS
NU
NV
NW
U
V
W
P
C218
0.1
<HCP>
R211
R212
R213
R214
R215
R216
R217
<1W>
1%
x7
6
UVW
-12V
D105
DAN217U
2
R155
100K
1%
W10 W11
W5 W6
R1
ZPR0RCH400
R152
4.7K
1%
R149
4.7K
1%
3
2
3
2
4
1
2
3
1
4
2
1
3
2
3
1
3
21
+5V
15V
R803
10K
<1/10W>
R802
560
<1/4W>
15V
5V
R804
1.0K
C801
0.01
<F>
D600
DAN217U
Q801
DTA143EUA
Q800
DTC143EUA
R801 1.0K
<1/4W>
C800
100/
25V
L800
BL02Rn1
C802
0.1
<F>
CR30
RE1201
JM32
JM31
C137
0.1
<F>
K1
G4A-1A
or
DW12D1
+
+
-
-
5V
18 14 10 543
21
12
3
4
5
78
SA1
RA-302M
VA1 470V
<TNR>
VA2 470V
<TNR>
W1
W2
W3
43
12
-0
W4
HY I C1
HU2001 or GK30434
R75
10K
R76
10K
R77
10K
C73
0.1
<F>
C71
0.1
<F>
C72
0.1
<F>
12V 12V
I C40
TD62064
12V
I C80
uLN2003
D80
SLR-332
<RED>
R80
2.2K
12V
2
7
9
16
4
5
12
13
3
6
11
14
1
8
10
15
O1
O4
O3
O2
GND1
I1
I4
I3
I2
COM1
COM2
NC1
NC2
GND4
GND3
GND2 1.5K <1/10W> x 4
R40
R43
R42
R41
16
15
14
13
12
11
10
9
1
5
8
7
6
4
3
2
1C
7C
6C
5C
4C
3C
2C
COM
1B
7B
6B
5B
4B
3B
2B
E
L40
5mmJP
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
1
2
3
1
2=3
L
N
R156
100K
1%
+
C20
0.1
<F>
15V
5V
15V
5V
R162
68K
1%
I C5-2
BA2903F
C130
0.1
<F>
C129
1000P
<B>
R159
4.7K
R161
1.5K
1%
I C105-1
BA2903F
R160
68K
1%
R163
10K 1%
+
+
6
57
1
2
3
-
-
R137 10K 1% R136 10K 1%
R138 10K 1%
D109
RB751V
R140
10K
1% -
+
6
57
R134
10K
1%
R133
10K
1%
I C104-1
BA2904F
I C104-4
BA2902F
R141
10K
1%
I C104-2
BA2902F
D108
RB751V
R139
10K
1%
R146
39K
1%
I C104-3
BA2902F
-8
+
9
10
3
21
-12V R143
39K
1%
R144
22K 1%
R145
22K 1%
C124
2200P
<B>
C123
2200P
<B>
3
21
3
1
4
2
12V
JM30
K30
FTR-F3
or
G5NB-1A
R22 1.0K <1/10W>
C21
0.047
<B>
R23
27K
<1/10W>
R20 1.0K
<1/10W>
R21
10K
<1/10W>
R157
4.7K
C138
2.2/50V
195K <RN-1/2W>
1%x4
R147
R148
R150
R151
D111 DAN217U
D110
DAN217U
I C3-1
BA4560
R126
100K
1%
C119
0.1
<F>
15V
3
1
R154
120K
5V
R131
10
1%
R142
1.2K
1%
C117
1.0
<B>
R132
2.2K
-
-
+
+
2
31
1
2
3
+
5
67
4
1
I C3-2
BA4560
R153
120K 1% 10K 1% x 2
R127
R128
I C103-1
BA4560
R129
100K 1%
2
1
3
2
1
3
0.20 <1W> 1% x 8
Q103
DTC143EUA
Q102
DTC143EUA
DC V R200 39
<1/2W>
D200
U1JU44 x 3
D201 D202
DC V
R105 195K
<RN-1/2W>
1%
F100
15A-250V
F50
3A
+
FH1
FH2
F4
BET 3.15A-250V
R104
220K
<2W>
R203 330K
C205 0.1 <F>
C204 47 / 35V
R202 330K
C203 0.1 <F>
C202 47 / 35V
++
R201 330K
C201 0.1 <F>
C200 47 / 35V
5V
L130
ELC0607RA
5V
C140
0.1
<F>
5V-2
15V
+
C139
2.2/
50V
I C103-2
BA4560
-12V
C120
0.1
<F>
R171
4.7K
33
11
22
13
10
11 +
-
I C102-4
BA2901F
I C102-2
BA2901F
-
+
7
5
6
R121
100K
1%
C113
2700P
<B> C142
0.1
<F>
I C100
TA8316
C105
0.1
<F>
R124
4.7K
R125 4.7K
R120 4.7K 1%
R166 3.9K R158 3.9K
4.7K
1%x2
R122
R123
5V
R106 195K
<RN-1/2W>
1%
15V
+C104
10/
25V
15V-2
D102
1NH42
R103
100
<1/2W>
R102
47K
Q100
GT30J122
3
2
1
C103
0.1
<HCP>
R167
10K
C106
0.1 <F>
5V-2 D106
DAN217U R219
1.0K
R206
R209
R208
R207
R205
R204
390 <1/10W> x 6
R218 4.7K
<1/10W>
R107
3.83K
1%
3
21
+
48
9
-
+
R113 4.7K
1% R110
6.8K
C107
0.1
<F>
C108
2.2/
50V
R1
15K
1%
C136
0.01
<F>
I C102-3
BA2901F
15V
C110
0.1
<F>
C112
0.1
<F>
+C109
2.2/50V
R111
10K
1
5
7
3
2
6
4
GAT I N
SI
DI
NC GND
SO
VCC
+
7
61
-
D115
DAN217U
D114
DAN217U
5V-2
L100 BL02Rn1
R108 47
<1/4W>
R109 22
<1/4W>
4
22
23
13
2
49
24
13
P51
X0
X1
AGND
GND
GND
X500
8.00MHz
<CSTS>
C500
0.1
<F>
5V
5V
C570
0.1
<F>
5V
I C570
BR93LC46
1
2
3
6
8
4
7
5
CS
SK
DI
NC
VCC
DO
NC
GND
5V
R570
10K
5V
I C101
TC 74HC00AF
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1
2
3
4
5
6
78
9
10
11
12
13
14
R168
22K
R169
22K
R165
22K
5V
C128
0.1
<F>
C127
2.2/
50V
+
+
R164
22K
C126
2.2/
50V
C125
0.1
<F> D112
DAN217U
3
12
3
12
D113
DAN217U
5V
+C134
0.1
<F>
C132
2.2/
50V
+
C133
2.2/
50V
C131
0.1
<F>
R170
68K
C580
0.1
<F>
R584
22K
R583
1.0K
R582
10K
R581
10K
+
C502
0.1
<F>
C503
0.1
<F>
C501
10/25V
I C560
S80842
2
1
3
4
VDD
OUT
NC
GND
JM101
JM102
JM103
JM100
TEST
10Kx4
R90
R91R92
R93
L50
BLm21AG610
x2
R585
1.0K
-
I C102-1
BA2901F
4
52
+
D107
RB751V
R118
10K 1%
D119
10K
1%
R116
15K
1%
R117
22K
1% C135
1000P <B>
C111
4700P
<B>
R115
22K 1%
R112
10K
1%
C141
1000P
<B>
R101
4.7K
5V-2
REACTOR
EARTH
AC208 - 230V
60Hz
SERIAL
V4-AC / I C80-3
SO / I C80-2
PR / I C80-5
TD/4P
TA / 6 P
TE/5P
ACV/7P
DCV/8P
I PM-CR / 9P
ACFAN / 28P
PR / 31P
V4-DC / 29P
V4-AC / 27P
SO / 32P
LED / 30P EPV3 / 44P
EPV4 / 43P
EPV2 / 42P
E2CS / 41P
I PM-TRIP / 33P
SO / 32P
PR / 31P
LED / 30P
V4-DC / 29P
ACFAN / 28P
V4-AC / 27P
CP-POS / 47P
T AUX3 / 21P
T TXD / 60P
PFC / 58P
TEST / 59P
CT / 3P
PFCSW / 35P
FANPWM / 2P
FANIN/17P
FANIN/17P
EPV3 / 44P
EPV4 / 43P
EPV2 / 42P
EPV1 / 45P
ACFAN / I C80-6
PR / I C80-5
V4-DC / I C80-4
V4-AC / I C80-3
SO / I C80-2
TE/5P
TD/4P
TA / 6 P
FANPWM / 2P
PIPE TEMP.
THERMISTOR
DISCHARGE TEMP.
THERMISTOR
OUTDOOR TEMP.
THERMISTOR
CN70
EXPANSION VALVE
CN40
B6B-XARK-1-A
RED
CN801
B5P6-VH-B-L
WHITE
FAN MOTOR
DCV-F POW_GND
POW_GND
CN30
B2P3-VH-B-C
4-WAY VALVE
GREEN
WHITE
BLACK
SERVICE
RED
5V
L70
BL02Rn1
C40
0.1
<F>
R71
4.75K
1%
R72
6.65K
1%
R73
38.3K 1%
C75
0.1
<F>
CN71
12V
5V
R130
220
1%
C572
0.01 <F>
R560
100K
C561
0.01
<F>
R561
1.0K
1
2
3
4
5
6
7
8
9
10
PFC-TRIP / 46P
PFCEN / 14P
PFCAW / 35P
I PM-CR / 9P
DCV/8P
CT / 3P
ACV/7P
CP-POS / 47P
/ T ICS
/ T RES
TCK
T AUX3
T MODE
T RXD
T TXD
T AUX
PFCEN / 14P
PFC / 58P
ZXL / 37P
SI/48P
ZXH / 36P
TEST / 59P
MD2 / 63P
MD1 / 64P
MD0/1P
E2CS / 41P
E2SK / 40P
E2D I / 39P
T MODE / 18P
MD1 / 64P
MD2 / 63P
TCK / 62P
TRXD / 61P
MD0/1P
/ T RES / 19P
SI/48P
PFCEN / 14P
Z / 55P
W / 54P
Y / 53P
V / 52P
X / 51P
U / 50P
PFC-R RIP / 46P
EPV1 / 45P
E2D I / 39P
ZXL / 37P
ZXH / 36P
E2SK / 40P
T AUX / 25P
/ T RES / 19P
T CK / 62P
T AUX3 / 21P
T MODE / 18P
T RXD / 61P
T TXD / 60P
T AUX / 25P
DCV-F
POW_GND
POW_GND
POW_GND
CN580
B10B-PASK-1
WHITE
COMP
COMP
SERVICE
C100-C102
660/450V x 3
++
JM101
JM102
JM103
JM100
TEST
+
R407
R406
R405
R403
R404
R400
R401
R402
CONTROLLER PCB ASSY
K05CM-0507HUE-C1
Model : MR18Y3F
2006.02.20 9

ERROR CONTENTS
Model : MW18Y3F
2006.04.05 10
Error Operation
LED Timer LED
Serial signal error Normal
2 flash
3 flash
4 flash
5 flash
Serial signal (reverse) error, at operation start up
Serial signal (reverse) error, during oeration
Serial signal (forward) error, at operation start up
Serial signal (forward) error, during operation
Indoor unit thermistor error 2 flash
2 flash
Outdoor unit thermistor error 3 flash
3 flash
2 flash
3 flash
4 flash
Indoor unit control error 4 flash
2 flash
3 flash
7 flash
4 flash
8 flash
Display
Error
Outdoor unit control error 5 flash
2 flash
3 flash
5 flash
Indoor fan motor error 6 flash
2 flash
3 flash
Abnormal lock
Abnormal rotation
CT abnormal
Outdoor unit fan drive system abnormal
2 flash
Refrigerant cycle error 7 flash
3 flash
Optional function error
Model information error
8 flash
0.1 sec on/off 0.1 sec on/off
4 flash
6 flash
Current trip error
Main relay welded
Outdoor temperature thermistor open / short
Indoor temperature thermistor open / short
Heat exchanger thermistor open
Heat exchanger middle thermistor open / short
Discharge thermistor open / short
VDD permanent stop protection
reverse VDD permanent stop protection
Forced automatic SW welded
Power interruption error
Compressor location detection error
Model information error
Discharge Temperature abnormal
Cooling high pressure abnormal rise
PFC circuit error

DISASSEMBLY ILLUSTRATION
51
2
2
1
6
7
1
4
5
5
Model : MW18Y3F
2006.05.12 11

32
24
30
29
20
43
46
48
236
37
26
28
52
36
40
39
33
21
38
27
61-1
61-2
31
Model : MW18Y3F
2006.06.08 12

1
2
7
18
5
19
29
10
20
24
26
32
12
13
6
39
3
35
22
21
25
14
40
36
37
37
11
4
34
8
16
15
Model : MR18Y3F
2006.04.05 13

PARTS LIST
INDOOR UNIT
Ref. Part No. Ord.
No MW18Y3F Q'ty
1 AIR FILTER 67201200
2 ELECTRIC ION X
4 HOLDER (FILTER) X
5 GRILLE CLAMP 67200936
6 FRONT PANEL ASSY 67201230
7 INTAKE GRILLE ASSY 67201232
20 GEAR-A 67201206
21 CASING ASY 67201233
24 CROSSFLOW FAN ASSY 67200918
26 CLAMP (MOTOR) 67201234
27 SHAFT HOLDER-C ASSY 67200922
28 DRAIN HOSE ASSY 67201235
29 DRAIN CAP ASSY 67201211
30 WIRE CLAMPER 67201236
32 COVER ( SWITCH ) 67201237
33 EVAPORATOR COIL 67201214
36 JOINT PIPE ASSY 67201238
37 INSULATION (PIPE)-E 67201217
38 HOLDER (EVAPORATOR) -L 67201239
39 HOLDER (EVAPORATOR) -R 67201219
40 WATER SEAL 67201220
42 AIR SEAL
43 TERMINAL 67201222
46 STEP MOTOR 67201225
48 FAN MOTOR 67201240
51 REMOTE CONTROL 67201241
52 BRACKET PANEL 67201242
61-1 FLOW CONTROL PANEL-U 67201203
61-2 FLOW CONTROL PANEL-Z 67201243
236 CONTROLLER PCB ASSY 67201244
…. THERMISTOR PIPE 67201245
…. THERMISTOR ROOM 67201246
…. INDICATOR PCB ASY 67201247
Description
2006.06.08 1
3

OUTDOOR UNIT
Ref. Part No. Ord.
No MR18Y3F Q'ty
1 TOP PANEL ASSY 67201400
2 TOP PANEL SEAL 67201401
3 CABINET SUB ASSY 67201402
4 GRILL ASSY 67201403
5 CABINET RIGHT SIDE 67201404
6 FAN RING 67201405
7 HANDLE 67201406
8 SWITCH COVER ASSY 67201407
10 4-WAY VALVE 67201408
11 EXPANSION VALVE ASSY 67201409
12 STRAINER 67201410
13 CONDENSER COIL 67201411
14 THERMISTOR SPRING -A 67206400
15 THERMISTOR SPRING -A 67201412
16 FAN BLADE 67201413
18 MOTOR BRACKET 67201414
19 SEPARATOR 67201415
20 BASE PAN 67201416
21 3-WAY VALVE 67201417
22 2-WAY VALVE 67201418
24 CORD CLAMP 67201419
25 TERMINAL 67201332
26 INVERTER PCB ASSY 67201420
29 FUSE 67201421
32 EXPANSION VALVE COIL 67201422
34 FAN MOTOR 67201423
35 COMPRESSOR 67201424
36 EMBLEM REAR 67201425
37 HEAT EXCHNGTHERMISTOR 67201426
38 SOLENOID COIL 67201427
….. IPM 67201428
….. OT.DR. TEMP. THERMISTOR 67201429
….. THERMISTOR 67201430
….. THERMISTOR ASSY 67201431
Description
2006.04.05 1
4

9305642014
Remote control
unit holder
Name and Shape
Part No.
MW18Y3F
9312752010
9315260017
0600185534
0700076046
9310519004
9312153015
9311925033
Remote control
unit
Battery (penlight)
Cloth tape
Tapping screw (big)
Wall hook bracket
STANDARD
ACCESSORIES
9306602017
9304536000
Tapping screw (small)
( 3 x 12)
( 4 x 25)
0700019036
Air cleaning filter
Air cleaning filter
Seal A
frame
2006.03.02 16

0511G2952