SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTED type
Models
Indoor unit
Outdoor unit
MW18Y3F MR18Y3F
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 . . . . . . . . . . . . . . . . . . 10
DISASSEMBLY ILLUSTRATION . . . . . . . . 12
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . 15
STANDARD ACCESSORIES . . . . . . . . . . . 17
DIMENSIONS
Model : MW18Y3F / MR18Y3F
(unit : mm)
790
215
508
20
540
790
125
66
300
2006.02.20
2
REFRIGERANT SYSTEM DIAGRAM
Model : MW18Y3F / MR18Y3F
Heat exchanger
3-Way
valve
( INDOOR )
Muffler
2-Way
valve
Sub-heat
exchanger
( INDOOR )
4-Way valve
Strainer
Expansion valve
Strainer
Heat exchanger
( OUTDOOR )
Cooling
Heating
Refrigerant pipe diameter
Liquid : 1/4" (6.35 mm)
Gas : 1/2" (12.7 mm)
2006.02.20
3
CIRCUIT DIAGRAM
CN201
Model :
MW18Y3F / MR18Y3F
RED
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
1
2
3
4
5
6
7
1 1
2 2
3 3
4 4
5 5
6 6
7 7
1
2
3
4
5
INDOOR UNIT
RED
1 1
2 2
3 3
4 4
5 5
1 1
2 2
3 3
4 4
5 5
ORANGE
YELLOW
PINK
STEP MOTOR
M
BLUE
BLUE
YELLOW
WHITE
1 1
2 2
3 3
4 4
5 5
6 6
BLACK
BLACK
1
2
BLACK
FM
PIPE TEMPERATURE
THERMISTOR
RED
FAN MOTOR
BLACK
BLACK
1
2
SW
POWER CIRCUIT
ROOM TEMPERATURE
THERMISTOR
GRAY
GRAY
3 3
2 2
1 1
VARISTOR
FUSE
3.15A
THERMAL FUSE
102
G
1
2
3
TERMINAL
OUTDOOR UNIT
TO OUTDOOR UNIT
REACTOR
RED
R(R)
2
2
1
1
RED
W7
1
2
3
1
2
3
WHITE
WHITE
COMPRESSOR
C M
W8
WHITE
RED
BLACK
S(S)
BLACK
W10
W11
W9
C(T)
RED
1
2
3
4
5
6
1
2
3
4
5
6
PIPE TEMP. THERMISTOR
BLACK
WHITE
YELLOW
BLUE
BLACK
1
2
3
4
1
CN801
BLACK
BROWN
BROWN
F M
2
3
4
FAN MOTOR
CN71
DISCHARGE PIPE TEMP. THERMISTOR
CONTROLLER PCB ASSY
OUTDOOR TEMP. THERMISTOR
BLACK
1
2
3
1
RED
BROWN
BLUE
ORANGE
YELLOW
WHITE
1
2
3
4
5
6
1
2
3
4
5
6
2
3
CN70
BLACK
CN40
CN30
WHITE
E V
EXPANSION VALVE
4-WAY VALVE
RED
W4
WHITE
FUSE
5A-250V
W2
W1
BLACK
FUSE 20A-250V
BLACK
BLACK
1
2
3
1
2
3
W3
4WV
TERMINAL
1
3
4
5
2
(L) (N)
G
TO INDOOR UNIT
POWER SUPPLY
2006.02.20
4
INDOOR PCB CIRCUIT DIAGRAM
Model : MW18Y3F
CONTROL UNIT
EZ-0051FHSE
TERMINAL BOARD
N
N
L
L
SERIAL
OUTDOOR UNIT
3
EARTH
EARTH
TERMINAL
W3
W2 W1
RED
BLACK WHITE
CN7
B3B-XASK
CN11
B2B-XH
1
1
3
TERMINAL FUSE
103
2
EX-OUT
EX-I N
CN12
B3B-XH
1
EXTERNAL COMMUNICATION CONNECTOR
CN10
B5B-XASK
3
CN10-1
RED
1
2
3
4
5
CN10-2
CN10-3
WHITE
BLACK
REMOTE CONTROL UNIT
CN3
S7B-ZR-3.4
CN201
JB20-07HG
CONTROLLER PCB ASSY
K04CP-0504WSE-C1
CONTROLLER PCB ASSY
ZHR-07
CN3-1
CN3-2
CN3-4
CN3-5
CN3-7
CN3-8
CN3-9
RED
1
2
3
4
5
6
7
1
2
3
4
5
6
7
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
K04CP-0500HSE-C1
INDICATOR PCB ASSY
K02CB-0300HSE-D0
CN8
BS5P-SHF-1AA
CN3-1
1
2
3
4
5
CN6
CN3-2
CN3-3
CN3-4
CN3-5
2P-SCN
PIPE TEMPERATURE THERMISTOR
ROOM TEMPERATURE THERMISTOR
1
CN3-1
CN3-2
BLACK
TEST
2
BLACK
CN5
2P-SAN
CN2-1
CN2-2
BLACK
BLACK
1
2
CN1
S5 (6-5) B-XARK
CN2
53325-0510
6
5
4
3
2
1
CN4-6
RED
CN7-1
CN7-2
CN7-3
CN7-4
CN7-5
RED
1
2
3
4
5
CN4-4
CN4-3
BLACK
WHITE
ORANGE
YELLOW
FAN MOTOR
F. M.
M
LOUVER
CN4-2
CN4-1
YELLOW
BLUE
PINK
BLUE
2006.02.20
5
Model : MW18Y3F
CONTROLLER PCB ASSEMBLY
K04CP-0500HSE-C1
R29 10K
<1/10W>
CN7
B3B-XASK
5V
IC2
BD4842
5V
13.5V
IC6
NJM7805
12V
D6
D1F60
5V
5V
5V
GND
5V
5V
R44 1K
<1/10W>
CN6
R39 10K
<1/10W>
R28 10K
<1/10W>
1
2
3
1
2
3
1
2
1
3
4
5
TERMINAL BOARD
O
3
N
L
I
VDD
NC
NC
C25
0.1
<F>
G
R42 49.9K
<1/10W>
(1%)
C46
0.1
<F>
VOUT
GND
2
C20
C22
330/
25V
C23
10/
25V
C24
0.1
<F>
C26
0.1
C19
330/
25V
+
+
+
RXD
TXD
VPP
0.1
W1
W2
BLACK
W4
W3
RED
HEAT EXCHANGER
THERMISTOR
WHITE
GREEN
<F>
<F>
JP1
R43 1K
<1/10W>
CN5
1
R23
IC1
UPD780058
F1
C45
0.1
<F>
R41 10K
<1/10W>
(1%)
3.15A - 250V
2
VA1 270V
<TNR>
R18 5V
61
74
REM
WIR
P00
P01
P02
P03
VDD0
VDD1
AVRF0
AVRF1
R16 R17 R19
ROOM TEMPERATURE
THERMISTOR
5V
R81 R82 R83
62
68
75
7
10K <1/10W> x4
5V
R15
R20 10K <1/10W> x6
AUTO RESTART
63
64
65
66
73
72
76
77
78
79
80
1
CN3
JM7
T1
C11 0.01
<F>
S7B-ZR-3.4
13.5V
R80
JM6 HOME AUTOMATION
160V
JP3JP4
JP2
60
27
28
29
30
31
32
34
35
36
37
38
39
40
41
42
43
8
ETS19AB1P8AG
P04
P05
XT1
XT2
P10
RST
P50
P51
P52
P53
R4 100K C7 0.01
<RS - 2W> <ECQE>
JM5 ROOM TEMPERATURE
CORRECTION 1
R84
R85
R86
R87
ROOM TEMPERATURE
CORRECTION 2
JM4
R8
34K
<1/10W>
(1%)
C15 R10
0.01 47K
<B> <1/10W>
C3
0.22
<LE>
JM3 CUSTOM CODE 1
JM2 CUSTOM CODE 2
20V
INDICATOR PCB
D2
D3
D1FL20U
1NH42
+
C
D1
REF
330 <1/10W> x6
R89
5V
R9
2
3
A
I C8
TL431 I LP
P11
P12
P13
P14
P15
P16
P17
P20
P21
P22
P23
P24
P25
P26
P27
P30
P31
P32
P33
P34
P35
P36
P37
P40
P41
P42
P43
P44
P45
P46
P47
P54
P55
8.25K
<1/10W>
(1%)
4
1
R2 2.2
<RGG-5W>
+
+
C10
100/
35V
5
C5
D
EN / UV
+
S
S
R61 10K
<1/10W>
100/
420V
P56
R11
1K
<1/10W>
C80
100 / 16V
7
8
R60 47
S
S
C6
0.1
<F>
1
2
4
3
<1/10W>
BP
P57
REM
C12
4700P
<E>
C81
0.01
<B>
C60
1000P
<R>
P60
L1
I C5
TNY266P
A
2
VA2 270V
<TNR>
P61
12V
9
3
P62
4
3
1
2
11
12
13
14
15
16
17
18
IC4
8
P63
P64
A
I C11
5
12
P65
5V
PS2501L-1
<KD / KE>
8
18
IC4-7 LN2003
P66
IC3
R24 10K
<1/10W>
15V
IC7
78M15
20V
P67
8
4
6
5
1
CS
VCC
D0
2
SK
R3
<1/2W
1
K
RXD
TXD
1
3
3
P70
D1
I
O
TEST
GND
C27
0.1
<F>
7
>
G
NC
9
2
P71
7
6
C17
330/
25V
C18
0.1
C16
0.1
14
10
+
R6 100K
<1/10W>
P72
5V
MANUAL AUTO
SWITCH
(KSM0632B)
44
45
46
47
48
49
50
51
19
52
53
54
55
56
57
58
59
5
<F>
<F>
R22
10K
<1/10W>
C29 10K
C30 1000P <R>
C31 1000P <R>
P120
P121
P122
P123
P124
P125
P126
P127
P130
P131
IC
12V
A
IC9-2
BA10393F 12V
R21 1K
<1/10W>
10
IC10
Q2
8
BZ1
D7
DAN202K
C62
0.1
<F>
6
5
DTC124EUA
5V
-
7
1
12V
PKM13EPY-4000
R63 15.4K
<1/10W>
(1%)
3
IC9
+
12V
2
IC4-6 LN2003
BZ
4
R65 10K
<1/10W>
5V
12V
12V
1
11
6
D60
CN10
B5B-XASK
2
3
-
R64 28K
<1/10W>
(1%)
WIR
D1F60
R25 10K
<1/10W>
3
R38 10K
<1/10W>
+
R26 390
<1/10W>
IC9-1
BA10393F
5
4
3
2
1
RED
5
4
3
2
1
5
12
WHITE
BLACK
REMOTE
CONTROL
UNIT
2
R62 10K
<1/10W>
5V
C33
0.01
<B>
JP5
20
21
22
23
24
6
R66 390
<1/4W>
(1%)
Q1
IC4-5 LN2003
1
DTC124EUA
D61
71
70
69
4
VPP
JP SETTING
R68 1K
<1/10W>
DAN217U R67 10K
<1/10W>
X1
5V
R27 390
<1/10W>
C34
0.01
<B>
X2
12V
AGND
GND0
GND1
IC4-4 LN2003
IC4-3 LN2003
IC4-2 LN2003
13
14
15
4
3
2
CN2
53325-0510
25
26
67
33
X1
5.00MHz
<CSTS>
LOUVER
IC4-1 LN2003
1
16
IC12
PS2501L-1
5V
15V
CN1
S5 (6-5) B-XARK
160V
R51 1K
<1/4W>
(1%)
<KD / KE>
Q6
C53
100 / 16V
1
2
4
DTC124EUA
3
3
15V
2
+
R50 330
<1/10W>
R52 820
1
5V
<1/4W>
(1%)
DC FAN MOTOR
15V
A
A
5V
R32R31
R54 10K
<1/10W>
CN8
R55 4.7K
<1/10W>
4
1
2
D50
RD27M
<B>
BS5P-SHF
C50
1000P
<R>
3
R53 1K
<1/10W>
R33
R30 10K <1/10W> x4
R37
R36
R35
R34
1
2
3
4
5
R56 6.8K
<1/4W>
TIMER SHORT CIRCUIT
IC13
PS2501L-1
<KD / KE>
A
CLOCK
DO
DI
330 <1/10W> x4
TEST
C35 0.1 <F>
C36 0.1 <F>
C37 0.01 <B>
C38 0.1 <F>
2006.02.20
6
Model : MW18Y3F
INDICATOR PCB ASSY
K03DV-0400WSE-D0
5V
5V
D206 SLR-325
CN201
1
2
3
4
5
6
7
8
9
2
1
D204 SLR-325
1
2
D203 SLR-325
2
1
C201
0.1
<F>
D201 SLR-325
2
1
5V
R201
47
<1/4W>
VCC
OUT
GND
2
1
I C201
GP1UM261R
3
C202
47/
+
10V
2006.02.20
7
OUTDOOR PCB CIRCUIT DIAGRAM
Model : MR18Y3F
INVERTER ASSEMBLY
EZ-005SHUE
EMI FILTER
A
REACTOR
UL3271 AWG16
RED
U
W7
RED
UL1015 AWG14
B
B
B
BLACK
W1 B
( A-1 )
UL3271 AWG16
WHITE
V
W8
WHITE
C. M.
UL1015 AWG14
WHITE
W2 B
( B-1 )
UL3271 AWG16
BLACK
W
W9
BLACK
COMPRESSOR
UL1015 AWG20
RED
W4
B
( D-1 )
1
2
3
BLACK
BLACK
CN30
UL1015 AWG16
GREEN
B2P3-VH-B-C
4-WAY VALVE
W3
B
BLACK
UL3271 AWG14
WHITE
( C-1 )
UL3271 AWG14
RED
N
L
1
2
UL1015 AWG20
W100 WHITE
TO
INDOOR
UNIT
W10 W11
UL1015 AWG20
W103 BLACK
B
B
F202
5A-250V
SERIAL
3
UL1015 AWG20
W102 BLACK
UL1015 AWG14
W101 BLACK
4
5
AC208-230V
60Hz
F201
20A-250V
CONTROLLER PCB ASSY
K05CM-0507HUE-C1
TERMINAL
1
2
3
4
5
6
RED
BLACK
CN801
DC FAN MOTOR
B5P6-VH-B-L
WHITE
F. M.
WHITE
YELLOW
BROWN
1
2
BLACK
BLACK
BROWN
BROWN
DISCHARGE TEMPERATURE THERMISTOR
PIPE TEMPERATURE THERMISTOR
CN71
B04B-PASK-1
3
4
WHITE
1
2
3
4
5
6
RED
BROWN
BLUE
CN40
B6B-XARK-1-A
EXPANTION VALVE
M
ORANGE
YELLOW
WHITE
1
2
3
BLACK
BLACK
RED
CN70
OUTDOOR TEMPERATURE THERMISTOR
B03B-PASK-1
WHITE
2006.02.20
8
Model : MR18Y3F
CONTROLLER PCB ASSY
K05CM-0507HUE-C1
F100
15A-250V
C100-C102
660/450V x 3
15V
L300
ELC0607RA
DC V
R200 39
<1/2W>
U
V
W
REACTOR
AC208 - 230V
60Hz
F4
D102
1NH42
BET 3.15A-250V
W7
W8 W9
U1JU44 x 3
D200 D201
PFC5000
-0702F
LL25XB60 x 2
C6
3.3/275V
C4
0.01/250V
R103
100
<1/2W>
FH2
W10
W11
W1
D202
D100
L
R104
220K
<2W>
2
1
4
BLACK
+
+
+
+
F50
3A
2
1
VA1 470V
<TNR>
2
Q100
GT30J122
3
R400
R401
R402
R403
0.20 <1W> 1% x 8
-
1
C1
0.1/
275V
C103
0.1
<HCP>
FH1
3
+
+
+
+
R102
47K
I C200
PFC5000-0702F
DCV-F
VA2 470V
<TNR>
D101
FSBS20CH60
R1
W5
W6
2
3
1
4
21
4
3
1
2
3
4
5
6
7
8
9
ZPR0RCH400
+
VCC
NU
R404
R405
R406
R407
-0
COM
W2
15V
C119
0.1
5V
15V
-
I N
N
WHITE
R126
100K
1%
POW_GND
C5
0.01/250V
L1
22
NV
I N
3
4
1
L130
5V-2
15V
I N
RCH4716-070PF07
SA1
12V
2
I PM-G
ELC0607RA
VFO
CFOD
CSC
I N
PR / I C80-5
<F>
RA-302M
NW 23
DC V
2
L100 BL02Rn1
15V-2
C104
1
U
V
W
D105
I C103-1
BA4560
W3
K1
C139
2.2/
50V
C140
0.1
C120
0.1
<F>
DAN217U
+
EARTH
G4A-1A
or
DW12D1
3
R127
R128
2
3
10 VCC
11 VB
12 VS
24
25
26
27
U
V
1
5
7
3
2
GREEN
VCC
R105 195K
<RN-1/2W>
1%
-
1
-12V
<F>
GAT I N
+
6
SO
+
R153
R155
100K
1%
-12V
10/
25V
S I
D I
NC
HY I C1
HU2001 or GK30434
R121
100K
1%
10K 1% x 2
120K 1%
R129
100K 1%
C137
0.1
I N
13
4
GND
I C103-2
BA4560
14
15
16
VCC
VB
5V
C105
0.1
<F>
6
5
R106 195K
<RN-1/2W>
1%
6
5V
-
+
7
7
I C100
TA8316
PFC / 58P
<F>
5
+
I C3-1
BA4560
R142
1.2K
1%
VS
W
P
5V
R218 4.7K
<1/10W>
17 I N
18
I C102-2
BA2901F
R157
4.7K
C138
R156
100K
1%
+
I C3-2
DC V
10
6
4
4
3
3
18
8
14
5
5
2
2
1
R124
4.7K
VCC
2
R122
BA4560
7
1
-
19
20
1
VB
VS
R21
10K
<1/10W>
7
+
-
R107
3.83K
1%
3
11
10
1
W4
5V
390 <1/10W> x 6
R204
U / 50P
+
+
13
6
I C101
TC 74HC00AF
SERIAL
5V
-
R154
120K
2.2/50V
R130
R131
10
R123
4.7K
1% x 2
RED
I C102-4
BA2901F
R171
220
1%
1
14
R20 1.0K
1
2
3
4
5
6
7
14
13
12
11
10
9
R205
R206
R207
R208
R209
5V
V / 52P
W / 54P
X / 51P
Y / 53P
Z / 55P
2
3
13
12
11
10
9
R210 1.0K
1%
C113
2700P
<B>
<1/10W>
ZXL / 37P
S I / 48P
C117
1.0
POW_GND
R211
4
5
6
7
R22 1.0K <1/10W>
4.7K
PFCAW / 35P
PFCEN / 14P
PFC-TRIP / 46P
C142
0.1
<F>
3
3
C214
R132
2.2K
<B>
C21
0.047
<B>
C20
0.1
R23
27K
<1/10W>
3
1
SO / I C80-2
2200P
<B>
R212
R213
R214
8
2
2
1
1
8
2
R167
10K
<F>
Q103
DTC143EUA
D115
D114
DAN217U
C218
0.1
<HCP>
JM32
JM31
CN30
DAN217U
I PM-G
5V
R101
4.7K
3
C106
B2P3-VH-B-C
5V-2
5V-2
D106
DAN217U
5V-2
0.1 <F>
I PM-TRIP / 33P
PFCEN / 14P
1
2
CR30
RE1201
V4-AC / I C80-3
C213
C215-C217 0.022
<F>
R116
15K
1%
R215
R216
4-WAY VALVE
R219
1.0K
2=3
R147 R150
C219
1000P
<B>
C141
1000P
<B>
C206-C208
R112
2
1
R115
R113 4.7K
1%
JM30
1
2
10K
1%
22K 1%
195K <RN-1/2W>
1% x 4
1
R118
10K 1%
D107
RB751V
R110
6.8K
12V
3
2200P <B> x 6
3
4
5
9
+
-
+
-
2
4
R217
4
8
I PM-G
15V
R148
R151
I C102-3
BA2901F
K30
FTR-F3
or
5V
1 D301
DAN217U
D302 RB751V
I C102-1
BA2901F
C107
0.1
<F>
R1
15K
1%
C108
2.2/
50V
D119
10K
1%
R117
22K
1%
+
+
C130
0.1
R329 47K 1%
C136
0.01
<F>
R330
4.7K
1%
5V
R220
1.0K
R162
68K
1%
5V
2
<1W>
1%
x 7
C110
0.1
<F>
I C300-1
BA4560
G5NB-1A
C135
<F>
R160
68K
1%
15V
DAN217U
D110
R163
10K 1%
ZXH / 36P
3
2
1000P <B>
R111
10K
-
I PM-CR / 9P
1
3
+
R159
4.7K
15V
2
1
DCV / 8P
R328
1.0K
3
C311
1000P
<B>
C111
4700P
<B>
R164
22K
C320
0.15
R332
4.7K
1%
+
1
-
R331
47K 1%
2
C112
C109
2.2/50V
3
I C105-1
BA2903F
0.1
<ECQB>
C129
1000P
<B>
R161
1.5K
1%
I PM-G
6
5
5
+
-
-
7
7
R165
22K
<F>
5V
6
+
R327
22K
R337
5V
15V
2
1
5V
5V
I C5-2
BA2903F
CT / 3P
POW_GND
R339
W
V
U
I C300-2
BA4560
10K
C306
0.1
<F>
5V
C126
2.2/
C125
0.1
<F>
C127
2.2/
50V
C128
0.1
3
R334
10K
1%
100K 1%
+
3
+
D111 DAN217U
R335 R336 R333
10K 10K 10K
1% 1% 1%
R136 10K 1%
R137 10K 1%
R134
10K
1%
R133
10K
1%
D112
DAN217U
-12V
R143
39K
1%
50V
R307 195K
<RN-1/2W>
<F>
3
1
2
1
R138 10K 1%
2
C305
0.1
<F>
-
2
1
3
+
D109
RB751V
R140
10K
1%
R135
10K
1%
I C302-1
BA2903F
R144
C330
R338
1%
15V
C133
2.2/
50V
C339
0.01
<F>
C131
0.1
<F>
I C104-1
22K 1%
R145
R168
22K
R169
22K
1000P
<B>
9
POW_GND
DCV-F
BA2904F
-
6
8
1
-12V
-
7
10
Q300
DTC114EUA
2
R308 195K
<RN-1/2W>
+
-
ACV / 7P
D113
5
1
+
3
+
Q800
DTC143EUA
C800
100/
25V
C123
I C104-3
2200P 22K 1% BA2902F
15V
5V
2
I C104-2 D108
BA2902F RB751V
R801 1.0K
<1/4W>
15V
D304
D303
C802
0.1
<F>
3
1
C132
2.2/
50V
C134
0.1
<F>
3
R170
68K
I C104-4
BA2902F
+
15V
+
C115
0.1
<F>
DAN217U DAN217U
<B>
3
FANPWM / 2P
2
R146
R139
10K
1%
R141
10K
1%
Q801
5V
DAN217U
C124
39K
2
1
DTA143EUA
5V
+
13
12
R802
560
C85
R81
1.0K
5V
-
2
1
2
1
14
2200P
1%
+
+
L800
C86
470P
<B>
10/
<B>
C116
0.1
<F>
<1/4W>
BL02Rn1
25V
2
1
R803
<1/16W>
3
3
D600
DAN217U
6
5
R152
4.7K
1%
R149
4.7K
1%
5V
10K
COMP
CN580
CP-POS / 47P
7
-
POW_GND
3
R309
5.76K
1%
<1/10W>
-12V COMP
C300
100P
<CH>
FAN IN / 17P
R83 27K
<1/10W>
C580
0.1
<F>
I C302-2
BA2903F
C801
R804
1.0K
CN801
1
2
3
B10B-PASK-1
R311
8.66K
1%
R582
10K
R581
10K
R583 R584
1.0K 22K
5V
WHITE
0.01
<F>
R504 10K
<1/10W>
SERVICE
JM501
B5P6-VH-B-L
1
2
3
4
5
6
R503
10K
R310
143
1%
WHITE
C84
C87
T AUX / 25P
0.1 <F> 330P <B>
T AUX
T TXD
T RXD
DC V - F
T TXD / 60P
T RXD / 61P
T MODE / 18P
T AUX3 / 21P
T CK / 62P
15V
D50
4
5
6
7
R502
1.0K
R500
10K
I C500
MB90460
SERVICE
JM500
FAN MOTOR
17 P63
FAN IN / 17P
VCC 56
AVCC 11
P00 25
P01 26
P17 40
P13 36
P14 37
P15 38
T MODE
16 P62
P46
35 P12
P50
R52
470K
<1/8W>
1%
1SS355
FANPWM / 2P
PFCSW / 35P
CT / 3P
TEST / 59P
PFC / 58P
T AUX / 25P
2
T AUX3
T CK
T60
RPZ-1F
15V
12V
R56
150K
<2W>
C52
2200P
<E>
D60
D1FL20U
8
9
12V
L40
5mmJP
12V
3
E2SK / 40P
ZXH / 36P
ZXL / 37P
1
2
10
9
/ T RES / 19P
CN40
59 P37
58 P36
60 P40
21 MD2
/ T RES
I C40
TD62064
C64
330/
25V
1
2
3
4
5
6
B6B-XARK-1-A
10
+
3
4
5
8
/ T ICS
RED
T TXD / 60P
T AUX3 / 21P
R53
510K
<1/8W>
x 3
D51
UDZS8.2B
R585
1.0K
D61
7
6
R40
R41
R42
R43
2
7
9
3
6
EPV3 / 44P
EPV4 / 43P
EPV2 / 42P
EPV1 / 45P
39
P16
E2D I / 39P
O1
I C60
BA7805
D63
1SS355
I 1
R57
0R0
D1FL20U
5V
I C570
BR93LC46
34
AVR 12
P24 45
P25 46
P30 50
P31 51
P32 52
P33 53
P11
47 P26
27
O2
I 2
O3
11
14
1
CP-POS / 47P
V4-AC / 27P
ACFAN / 28P
V4-DC / 29P
LED / 30P
PR / 31P
SO / 32P
I PM-TRIP / 33P
EPV1 / 45P
PFC-R RIP / 46P
U / 50P
I 3
EXPANSION VALVE
16 O4
P02
I 4
C65
470/
25V
E2CS / 41P
E2SK / 40P
E2D I / 39P
1
2
3
8
4
7
5
L50
CS
VCC
DO
NC
+
4
GND1
28 P03
29 P04
30 P05
31 P06
32 P07
33 P10
5V
+
R61
1.0K
COM1
1.5K <1/10W> x 4
D62
SK
D I
BLm21AG610
x 2
R54
R55
5
GND2
8
X / 51P
V / 52P
Y / 53P
W / 54P
COM2
D1FL20U
12V
12
10
15
GND3
C570
0.1
<F>
D53
UF4005
NC1
NC2
6
NC
GND
1
O
3
I
C40
0.1
<F>
13 GND4
G
2
D80
P34
P35
P60
54
55
14
L51
C67
0.1
<F>
C68
100/
25V
5V
SLR-332
Z / 55P
C66
+
<RED>
C572
0.01 <F>
57
C
R570
10K
100/
25V
PFCEN / 14P
L70
BL02Rn1
CN71
E2CS / 41P
EPV2 / 42P
EPV4 / 43P
EPV3 / 44P
41 P20
42 P21
43 P22
44 P23
10 P57
P61 15
MD0 18
MD1 20
I C80
uLN2003
D52
1SS355
I C50
TOP243P
R80
2.2K
1
2
3
4
T MODE / 18P
PIPE TEMP.
THERMISTOR
LED / 30P
SO / 32P
V4-AC / 27P
V4-DC / 29P
PR / 31P
16 1C
1B
2B
3B
4B
5B
6B
7B
E
1
2
3
4
5
6
7
8
5V
1
2
3
4
8
M
S
S
C
S
MD1 / 64P
MD2 / 63P
TCK / 62P
TRXD / 61P
MD0 / 1P
P44
64
SO / I C80-2
15 2C
R51
47
R75
10K
C69
100/
25V
S
7
P43 63
P42 62
P41 61
10K x 4
R92R91
+
DISCHARGE TEMP.
THERMISTOR
V4-AC / I C80-3
V4-DC / I C80-4
PR / I C80-5
14 3C
13 4C
12 5C
11 6C
D64
1SS355
9
8
7
5
6
4
P56
P55
P54
P52
P53
I PM-CR / 9P
DCV / 8P
ACV / 7P
TE / 5P
TA / 6P
TD / 4P
TE / 5P
TD / 4P
TA / 6P
R93
R90
5
D
R71
4.75K
1%
R72
6.65K
1%
C71
0.1
<F>
AOUS09LAC
JM101
JM102
JM103
JM100
C50
47/
35V
P45
1
19
48
C51
1.0
<B>
+
R76
10K
ACFAN / I C80-6
ACFAN / 28P
/ T RES / 19P
S I / 48P
RSTX
P27
MD0 / 1P
7C
10
CN70
MD1 / 64P
MD2 / 63P
TEST / 59P
9
COM
12V
1
2
3
C503
0.1
<F>
AGND 13
P51
TEST
-12V
C72
0.1
<F>
5V
R560
100K
R561
1.0K
22 X0
23 X1
3
24
GND
OUTDOOR TEMP.
THERMISTOR
R77
10K
GND 49
2
1
NC
3
4
VDD
POW_GND
1
AOUS12LAC
JM101
JM102
JM103
JM100
C500
0.1
<F>
OUT GND
C75
0.1
<F>
+
C73
0.1
<F>
X500
8.00MHz
<CSTS>
C502
0.1
<F>
C561
0.01
<F>
I C560
S80842
2
TEST
R73
38.3K 1%
C501
10/25V
2006.02.20
9
ERROR CONTENTS
Model : MW18Y3F / MR18Y3F
Self-diagnosis function table (Flashing LED Display)
* Detailed Trouble Display (secondary level) can be indicated by pressing Test Operation button.
Detailed Trouble Display (by Test Button)
Trouble Display (primary)
Detailed Error Item
Error
Operation
Timer
Error
Operation
Timer
When a signal is not read continuously for 10 secs
from power relay ON immediately after operation starts
>>Cooling 0 code transmission, automatic reset
When a signal is not read for 20 secs thereafter
>>Trouble display continues and power relay OFF
>>Permanent stop
Serial signal
error
Normal
1 sec
blinking
Serial reverse signal error
at operation start up
0.1sec
blinking
0.5sec
2 times
Signal reverse signal error
during operation
0.1sec
blinking
0.5sec
2 times
When a signal is not read continuously for 10 secs
from power relay ON immediately after operation starts
>>Cooling 0 code transmission, automatic reset
When a signal is not read for 20 secs thereafter
>>Trouble display continues and power relay OFF
>>Permanent stop
Serial forward signal error
at operation start up
0.1sec
blinking
0.5 sec
4 times
Normal Serial Forward Signal can not be
received more than 10 secs
>>Releases when it becomes normal
Serial forward signal error
during operation
0.1sec
blinking
0.5sec
5 times
Normal Serial Forward Signal can not be
received more than 10 secs ( after receiving
effective forward transfer signal)
>>Releases when it becomes normal
Indoor unit
thermistor
error
0.5sec
2 times
0.1sec
blinking thermistor open
Indoor temperature
0.5sec
2 times
Thermistor detection value is open when
AC plug is inserted
0.1sec
blinking
>>Releases when value becomes normal
Pipe thermistor
open or short
0.1sec
blinking
0.5sec
3 times
Thermistor detection value is open or short
when AC plug is inserted
>>Releases when value becomes normal
Thermistor detection value is open or short
Outdoor unit 0.5sec
0.1sec
blinking open or short
Discharge thermistor
0.1sec
blinking
0.5sec
2 times
thermistor
error
3 times
>>Outdoor unit stops
Releases when it becomes normal
Heat exchanger
thermistor open
0.1sec
blinking
0.5sec
3 times
Thermistor detection value is open
>>Outdoor unit stops
Releases when it becomes normal
Outdoor temperature
thermistor open or short
0.1sec
blinking
0.5sec
4 times
Thermistor detection value is open or short
>>Outdoor unit stops
Releases when it becomes normal
Forced automatic SW
welded
0.5sec
2 times
Forced Auto SW is ON for more than
10 secs continuously
Indoor unit
control error
0.5sec
4 times
0.1sec
blinking
0.1sec
blinking
>>Error is indicated while it is ON
Normal Operation other than error indication
Main relay welded
0.1sec
blinking
0.5sec
3 times
Serial Reverse Signal is received 1 min.
after Main relay becomes OFF
>>Error is indicated while serial reverse
signal is input on normal operation
Normal operation except error indication
Power interruption error
0.1sec
blinking
0.5sec
4 times
50/60Hz is not detected after 4 secs of
power ON.
>>Error is indicated and unit is stopped
2006.02.20
10
Detailed Trouble Display (by Test Button)
Trouble Display (primary)
Detailed Error Item
Error
Operation
Timer
Error
Operation
Timer
Outdoor unit
control error
0.5sec
5 times
1 sec
blinking
Current trip
0.1sec
blinking
0.5sec
2 times
Current trip error is 2nd time within
start up
>>Permanent stop
CT abnormal
0.1sec
blinking
0.5sec
3 times
Current detection value is 0A for more
than 1 sec when compressor is
operated at more than 56rps
>>Automatic release after 3 min. ST
Compressor rotation
error
0.1sec
blinking
0.5 sec
5 times
Compressor location detection error (incl.
failed start up) for 3 times
>>Permanent stop
Outdoor unit fan drive
system abnormal
0.1sec
blinking
0.5sec
6 times
When outdoor fan abnormal fan motor
duty abnormal operated 5 times
>>Permanent stop
Indoor fan
motor error
0.5sec
6 times
0.1sec
blinking
Abnormal lock
0.1sec
blinking
0.5sec
2 times
Detected rotation is 0 r.p.m. at start up or
at 56 secs after Fan mode is selected
>>Permanent stop
Abnormal rotation
Discharge temperature
0.1sec
blinking
0.5sec
3 times
Detected rotation is 1/3 of target r.p.m. at
start up or at 56 secs after Fan mode is
selected
>>Permanent stop
Refrigerant
cycle error
0.5sec
7 times
0.1sec
0.1sec
blinking
0.5sec
2 times
Discharge Temperature protection
(Discharge temperature is 110degC)
operated 2 times
blinking abnormal
>>Permanent stop
Cooling high pressure
abnormal rise
0.1sec
blinking
0.5sec
3 times
High pressure rise protection (Outdoor
heat exchanger temperature is 65degC)
operated
>>Comp. OFF (releases after 3min.ST)
Error is indicated while 3 min.ST
Optional
function
error
0.5sec
8 times
0.1sec
Active filter voltage
0.1sec
blinking
0.5sec
2 times
Active Filter voltage error operated 3 times
blinking abnormal (3rd time)
>>Permanent stop
Active filter foltage
abnormal (1st time)
0.1sec
blinking
0.5sec
3 times
Active Filter Module error or open
detection protection operated
>>Automatic release after 3 min. ST
2006.02.20
11
DISASSEMBLY ILLUSTRATION
Model : MW18Y3F
2006.02.20
12
Model : MW18Y3F
2006.02.20
13
Model : MR18Y3F
2006.02.20
14
PARTS LIST
INDOOR UNIT
Part No.
Ref.
Ord.
Q'ty
Description
No.
MW18Y3F
1
2
Air Filter
9309997011
9312152018
9306602017
9306755010
9309999053
9313566043
9309994003
9311354079
Filter (Electric + ION)
Holder (Filter)
Clamper (Grille)
Front Panel
4
5
6
7
Intake Grille Assy
Gear-A
20
21
Casing Assy
24
26
27
28
29
30
32
33
Crossflow Fan Assy
Clamp (Motor)
9307836015
9310102008
9306628017
9314147012
9314493010
9311946014
9313943011
9313099015
Shaft Holder-C Assy
Drain Hose Assy
Drain Cap Assy
Wire Clamper
Cover (Switch)
Evaporator Total Assy
36
37
38
39
40
42
43
46
Joint Pipe Assy
Insulation (Pipe)-E
Holder (Evaporator)-L Assy
Holder (Evaporator)-R
Water Seal
9313792015
9304607007
9313174019
9309983014
9312912018
9310611005
9701955114
9900139025
Air Seal
Terminal
Step Motor
48
51
52
Fan Motor Assy
Remote Control Unit
Bracket Panel
9602109012
9315260017
9310001004
61-1 Flow Control Panel-U
61-2 Flow Control Panel-Z
9309991033
9309992030
236
Controller PCB Assy
9707193015
(K04CP-0500HSE-C1)
9702039042
---
---
Pipe Temperature Thermistor
Room Temperature Thermistor
9700801108
---
---
Indicator PCB Assy
Evaporator B Assy
9705039032
9311275022
When you order parts, please make a photocopy of this page
and fill the number of the parts in the "Order" column.
2006.02.20
15
OUTDOOR UNIT
Part No.
Ref.
Ord.
Q'ty
Description
No.
MR18Y3F
1
2
3
4
5
6
7
8
Top Panel Assy
Top Panel Seal
Cabinet Sub Assy
Blow Down Grille
Cabinet Right Assy
Fan Ring
9309230057
9309228016
9314809040
9308884015
9309236011
9308885012
9308880017
9309237049
Grip
Switch Cover Assy
10
11
12
13
14
15
16
18
4-Way Valve
9970056017
9311641018
9311440017
9311382027
313728262708
9300089012
9309909014
9308872012
Expansion Valve Assy
Strainer
Condenser Assy
Thermistor Spring-A
Thermistor Spring-A
Propeller Fan
Motor Bracket
19
20
21
22
24
25
26
29
Separator
9312971015
9308869081
9315159014
9313064013
9307271014
9703874024
9707039085
0600382018
Base Assy
3-Way Valve Assy
2-Way Valve Assy
Cord Clamp
Terminal
Inverter PCB Assy
Fuse
32
34
35
36
37
39
---
---
Expansion Valve Coil
Fan Motor
9900057039
9602133017
9313764012
9312661015
9900148027
9970033025
9705720015
9900210045
Compressor Assy
Emblem Rear
Heat Exchanger Thermistor
Solenoid Coil
IPM
Outdoor Temp. Thermistor
---
---
Thermistor
9900041014
9900148027
Thermistor Assy
When you order parts, please make a photocopy of this page
and fill the number of the parts in the "Order" column.
2006.02.20
16
STANDARD
ACCESSORIES
Part No.
Name and Shape
MW18Y3F
Wall hook bracket
9312752010
9314990038
Remote control
unit
Remote control
unit holder
9305642014
0600185534
Battery (penlight)
Cloth tape
9310519004
0700076046
0700019036
Tapping screw (big)
(
4 x 25)
Tapping screw (small)
3 x 12)
(
Air cleaning filter
9312153015
9311925033
Air cleaning filter
frame
9306602017
9304536000
Seal A
2006.02.20
17
0511G2952
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