Service Manual -
B-VMHxxAV-1
Outdoor unit printed circuit board diagram: 17122000048064
5V
T3
T4
TP
1
TEST
PO
R
T
1
T20A
1
+
+
D
C
-F
AN
DR
DR
MCU
EE
N
N
N
[1.
4]
2019-
10-
15
7805
S
N
-IN
L-
IN
K
FR
-7
2W
/B
P3
-(R
X2
4T
m
ini
+6A
161+
PS
S30
S92F
6-
AG
+6
822+
LM
SR
).D
.13
.W
P2-
1
BLAC
K
RE
D
15V
5V
PMV
BL
UE
Ea
rth
HEAT
2
HE
AT
1
4-
W
AY
AC
-F
AN
+
1
P
T30A
/25
0VAC
171
22000
048064
+
D
401
C209
+
E20
1
L2
01
CN1
9
+
D801
L4
L3
C1
0
C9
C
41
2
C40
7
IC4
01
R4
02
+
E4
01
C4
02
C4
01
R
40
1
+
D4
02
R
40
3
C403
L403
L4
02
L40
1
R626
+
D
Z3
01
CN
21
CN
23
ZR2
ZR1
CN5
05
FUS
E1
L1
C803
D102
IC
101
C211
DR2
2
DR
21
CN15
CN1
4
CN6
_1
C305
C31
4
C315
R
611
R61
5
ZR
3
R6
09
R5
28
R51
6
R51
5
R512
R506
R504
R502
R4
04
R31
5
R31
4
R31
3
R30
7
R305
R3
04
R
228
R2
27
R
226
R2
22
R2
21
R2
13
R2
12
R2
11
R
210
R2
09
R208
R
207
R205
R203
R201
R1
+
E50
1
+
+
D
Z5
01
D103
CN
18
C8
C61
4
C
608
C6
07
C60
6
C
520
C
516
C514
C51
2
C511
C51
0 C
50
1
C41
5
C
41
0
C310
C205
C204
C203
C
115
C106
C6
C2
C615
R508
IPM
501
R
52
5
C
515
R511
R510
R50
9
R507
R50
5
C508
C507
C503
C5
19
C51
8
C
517
+
E50
2
+
E5
03
+
E504
R407
R40
8
R42
1
IC4
05
R6
05
VP1
CI
N
VNC
NU
NW
NV
V-
W -
FO
VWB
VVB
U-
W +
V
V+
W
U+
VUB
P
U
VP1
VN
1
IPM1
L601
R41
2
IC
403
+
E40
9
+
E40
4
D
407
C4
09
C413
CN
7
CN
6
CN
2
CN
8
CN
29
CN
28
CN2
7
RY
1
L6
L5
DAS1
R60
1
R
30
1
+
-
AC
OU
T
IN
~
~
RY
3A
C3
C1
R62
5
R6
23
R
622
R
514
R513
C6
11
T1
CN
60
IC
202
R104
R603
C
20
2
R1
03
-
+
AC
AC
BR1
C801
C802
C103
C1
04
C1
05
C212
C114
C116
C208
C20
7
C206
C111
C112
C304
C3
09
C317
C
12
C404
C405
C4
08
C60
1
C60
5
C60
4
C612
C
613
D603
+
DZ
30
4
+
DZ
30
3
+
DZ
30
2
+
D
Z601
E601
IC
801
IC8
02
IC2
03
IC
404
Q
80
1
R
804
R105
R1
10
R1
11
R22
5
R
215
R8
06
R80
5
R
809
R8
10
R808
R807
R2
24
R2
17
R223
R2
16
R22
0
R
219
R2
18
R202
R20
6
R106
R107
R302
R406
R405
R607
R602
R604
R61
4
R608
R610
R61
2
R61
6
R6
17
R6
18
R6
19
R620
R621
+
D404
R204
C31
6
C307
C30
8
C313
C31
2
C311
R310
R3
06
R308
R3
09
R312
R3
11
R4
26
C318
C3
19
C513
R317
R316
R318
R3
19
R320
R6
24
+
E30
1
+
E30
2
+
E30
4
+
E30
3
C
20
1
C301
C3
02
C3
03
+
D602
IC
201
C603
R60
6
R109
RC1
RC2
RY
3
RY
2
R10
8
+
D
40
3
PT
C
1
+
E2
RY
4
C509
+
D8
02
CN
16
R
Y5
+
E1
R61
3
E
C
G
Q
601
R801
R8
02
+
LED
101
1
3
O
SC
101
CN1
7
R803
C4
CN5
C610
+
D6
05
IC
602
IC
601
D6
04
C5
A
D60
1
C6
09
C10
1
+
E405
C7
C
N4
14
+
E6
02
C
804
+
E202
+
E203
+
E204
R503
R
119
D1
01
R2
14
R1
01
R10
2
C
210
C
109
C1
10
C1
07
C
102
C
108
E60
3
R321
1
CN
506
IC
603
13
14
12
1
2
3
4
5
6
7
9
8
10
11
Summary of Contents for Comfort-Aire Century A-VMH18SV-1
Page 30: ...Service Manual B VMHxxAV 1 ...
Page 37: ...Service Manual B VMHxxAV 1 Outdoor Unit 3 3 Panel Plate X430 Square grille ...
Page 38: ...Service Manual B VMHxxAV 1 Outdoor Unit 4 4 Panel Plate D30 Square grille ...
Page 39: ...Service Manual B VMHxxAV 1 Outdoor Unit 5 5 2 Service Place Minimim 4 Recommended 12 ...
Page 42: ...Service Manual B VMHxxAV 1 Outdoor Unit 8 8 A VMH18SV 1 A VMH24SV 1 ...
Page 45: ...Service Manual B VMHxxAV 1 ...
Page 103: ...Service Manual B VMHxxAV 1 Troubleshooting 15 ...