Service Manual -
VMH 9/12/18/24 SU & VMH30/36S D Series
23
25
9.2 Outdoor
U
nit
E
rror
D
isplay
For
A-VMH09SU-1, A-VMH12SU-1, A-VMH18SU-1
After power on, LED3(Green color) and LED2(Red color) will be flash if the unit has some
problems.
No.
Problems
LED3
(Green)
LED2
(Red)
IU
display
1
Normal, Standby
O
X
2
Normal, Operation
X
O
3
IPM malfunction or IGBT over-strong current protection
☆
X
P0
4
Over voltage or too low voltage protection
O
O
P1
5
EEPROM parameter error
O
☆
E5
6
Inverter compressor drive error
X
☆
P4
7
Inverter compressor drive error
☆
O
P4
8
Inverter compressor drive error
☆
☆
P4
O
（
light
）
X
（
off
）
☆（
2.5Hz flash
）
Suction
Exhaust
+
17122200000309
Hui Qi
Test
Po
rt
1
1
HEAT
4-WAY
W
BLUE
BLACK
RED
V
U
TP
T3
T4
No
NO
NO
YES
Low-Fre
No
Have
YES
Have
Temp-Pro
Rdi
Ripm
11
PMV
44
15V
17V
[V1.8] 2015-01-16
7815
22
1
34
REACTOR
311 TEST
7805
N-IN
DC
-FA
N
AC
-
FA
N
L-IN
S
KFR-72W/BP2-( 311+0515+PSS30S92F6-AG+6822+HEAT).D.13.WP2.1
12V
5V
CN3
D SA1
K
A
K
D5
R18
R 46
R107
A
R515A
R316A
R18A
I
C403
D4
C
21
R54
R55
R68
R69
R56
R90
C14
J4
R16
R52
J5
+
L
ED1
R 78
R1 42
R1 41
R1 55
R1 54
R1 53
R 152
R1 51
R150
C3
R108
R1
07
RC2
RC4
RC1
RC3
C1
F US E1
65T 250V30A
Z R1
ZR2
CN30
R109
R
58
R
61
R60
R
59
C3
01
C76
C3
12
R315
C83
C85
C
86
C9
1
R1 56
R158
R1
69
R170
R1
71
R1
72
I C34
D
11
R1
57
R159
C3
10
C306
C3
08
C
311
C
307
C
309
R
110
E 305
C3 02
+
D Z3 01
Q3
R75
R
84
C1
03
CN 28
CN 29
C N6 -1
C N6
C N13
CN 12
CN2
CN8
CN7
CN22
DR
CN21
DR
R 102
J6
PTC1
CN414
R1 27
C1 05
+
E5
IPM
2
C5
01
C5
03
C507
C508
C509
C510
C5
11
C512
C517
+
D Z5 01
R5
01
R5
02
R5
03
R5
04
R5
05
R5
06
R509
R5
10
R511
R512
R513
R
514
R523
C5 02
C505
+
DZ502
R5 15
R5 22
+
D
Z5
04
C 504
R316
~
~
IN
AC
-
+
R1 01
R 100
R 71
C42
CN20
R Y5
CN16
CN18
NTC4
C 8
C5
13
C514
C5
15
C5
16
R5 16
R5 17
R 518
R 519
R5 20
R5 21
C27
I C7
24LC512
33
49
17
1
IC9
R 53
I
C1
01
R160
+
E4
+
E3
R
83
R 82
R81
R
80
R 79
R50
C47
C
20
R 322
R 321
R320
Q 2
I C4 05
+
E10
R
120
R1
67
R166
R
32
+
E1
R 12
+
L ED3
R4
12
R
413
R
414
R415
Rdi
Ri
pm
R 13
CN24
R72
R 8
R87
R74
J3
IC 17
+
E24
D2
R1 24
C2
J2
J1
C77
AC
A
C
+
-
BR1
C13
D3
R7
R Y3
R Y4
R Y2
CN5
R 23
R 24
R25
R26
R27
C74
C75
RY1
+
E 14
C9
C 17
C 18
C19
C23
C
24
C
26
C
32
C33
C 35
C 36
C37
C39
C
43
C48
C
49
C 52
C65
C67
C78
C87
C89
C90
C92
C147
C153
C25
CN9
CN23
C N39
+
E 17
+
E 23
+
E28
I C8
24LC08
I C12
24 LC08
IC 14
+
L ED2
O SC1
R5
R30
R31
R 40
R41
R42
R 48
R
49
R62
R
64
R
65
R
66
R
70
R73
R76
R77
R86
R 92
R 97
R161
R1
62
R1
63
R1 64
R 165
R1
76
R 177
R 419
X1
C58
+
+
E 405
IC404
R 45
Q1
C
15
C22
R21
R22
R28
R 29
R33
+
E 22
R3
R4
R 121
C 5
+
E 6
R10
C28
C4
C N38
I C10
C79
C80
D7
C6
R
148
R
63
C 506
R5
07
R508
+
E11
R1 06
C73
IC 21
P C817
I C31
PC817
R1
75
R178
C 409
IC402
C 403
IC 11
+
E402
D 401
C4 01
R
403
C4 11
C40
C 50
D
40
3
R4 01
R405
R
406
R
404
+
E404
D4 02
D 404
C4
08
C 402
+
E 403
R407
R4
08
C4 04
C1
10
+
E 409
+
E4
01
R4 02
C 405
10
9
7
6
5
4
3
1
T401
C4 06
C4 07
D13
D 14
+
E406
+
E 407
+
E 408
+
E5 02
+
E5 03
+
E 504
+
D
Z5
03
CN25
R6
R9
CN60
IC406
I C4 07
C7
D1
R1
R137
IC2
P C8 51
IC1
P C8 17
R2
R126
R125
R1 23
R1 22
R1 19
R 118
R 117
R15
R14
C
99
C98
C
97
C96
C95
C94
C93
C 66
D
20
R
17
CN17
CN
10
C N1
C41
R38
C45
C44
R136
R 135
R1 34
R104
D12
D10
C54
+
D8
D9
R57
R20
C2
42
C
243
C244
R89
E 2
R67
C
84
C10
C11
IC4
C12
C 38
R
34
R 47
R88
I
C32
R39
R35
R36
R19
+
D Z6
R 37
C46
C51
C 53
CN19
+
D Z2
+
E 27
IC3
P
C8
17
IC5
P C8 17
Q8
R43
R44
R85
R91
R93
R95
R96
R 99
D15
R
51
+
E 410
+
E 8
C 60
C 61
E3 02
E3 03
E3 04
C 62
VN1
VP1
U
P
VUB
U+
W
V+
V
W+
U-
VVB
VWB
FO
W-
V-
NV
NW
NU
VNC
CIN
IPM1
+
D Z3 04
+
D Z3 03
+
DZ302
C 314
C3
16
C3 18
C30
C 34
C31
ZR3
ZR4
C 82
L1
R11
R1
40
CN27
E 301
R168
IGBT1
connect to the DR module
connect to earth
fuse 250V 30A
connect to reactance
290-330VDC standby
210-300VDC running
power supply 208-230V AC connect to the terminal
connect to 4-way val ve
when 4-way is on, output 208-230V AC
AC FAN mototr
connect to compressor heater
when heater is on, output 208-230V AC
1 low speed
2 hign speed
3 ground
external drive motor
connect to DC motor
0V AC standby
10~200V AC
’
running
U
V
W
connect to electric expansion valve
6
5
4
3
2
1
+12VDC
+12VDC
+12V DC pulse wave between( +4)-GND
+12V DC pulse wave between( +3)-GND
+12V DC pulse wave between( +2)-GND
+12V DC pulse wave between( +1)-GND
EEPROM Programmer Port
reserve
test port
Connect to PC
communication
V
U
W
connect to PC communication
test port
LED2
（
red
）
&LED3
（
green
）
: status light
combination LED2 and LED3 show errors
（
refer to the attechment Word
）
LED: status light
（
yellow
）
slow flicker
：
standby
（
0.5Hz
）
quick flicker
：
error
（
2Hz
）
continuous light: running
internal drive motor
6 5 4 3 1
ro
tat
e s
peed feed
ba
ck si
gn
al
0-1
5V sq
ua
re
sig
nal
dr
ive
po
wer
volt
age: +
15VDC
DC
ne
gati
ve
pole:
G
N
D
DC positive pole P: 315VDC
exhaust temp. sensor
pipe temp.sensor& room temp. sensor
TP T4 T3
7 6 5 4 3 2 1
RT
+5V
D
C
RT
RT
+5V
D
C
+5V DC
CN5
/CN4
connect to
chassis
heater
when heater is on, output 208-230V AC
connect to DC motor
0V AC standby
10~200V AC
’
running
bridge
IGBT
fast recovery diode
(FRD)
IPM for compressor
IPM for DC FAN
reserve
P
N
