Johnson Controls HVWHP072B32S - Printed Circuit Board

(Main Parts)
MAINTENANCE
SM-18006
4-85
4.2.3 Printed Circuit Board
● Checking Procedures for Water Source Unit PCB
Turn ON the water source
unit power supply.
No
No
No
There are possibilities of the following
failures:
• Power Circuit of W.S. PCB Failure
• Failure of 208/230V load
equipment such as solenoid valve
• Incorrect connection of 208-230V
output connectors
Power Circuit of
W.S. PCB Failure
Yes
Yes
No
Fuse (EFR1 or EFS1)
is blown?
W.S. PCB: Water Source Unit PCB
LED5 (red) for DC280V
applied voltage indicator
flashes.
Yes
Press and hold the PSW1
of W.S. PCB to change
the Check Mode.
The indication “OCP” will be
displayed on the 7-segment.
DC280V line and
DC5V line are normal.
The voltage 13V is applied
between the test port
“VCC13” and “GND1”.
DC13V line is normal.
• Replace fuse (EFR1 or EFS1).
• Replace each 208/230V load
equipment if faulty.
• Test multimeter connections to ensure
they are connected.
Yes
Yes
LED1 (red) for DC5V
applied voltage indicator
flashes.
Replace
W.S. PCB
W.S. PCB Failure
Replace
W.S. PCB
No
● Water Source Unit PCB (PCB1: PO151)
Arrangement of Connectors and Check Points.
103
R87
Q25 Q24
222 222 222
R141 R142 R143
C117
C118
4702
R221
4303
R222
8202
R220
152 152 152 152
R172 R73 R72 R67
3901
3901
3901
C115
R216
R219
R218
102
R223
Z5
L4
JP7
JP8
C119
ZD15
C130
C131
Q48
Q49
Q47
Q46
Q50
Q54
Q4
272272 272272
R110 R113 R126 R132
103
R109
DSW7 DSW4
3
ON
56412
3
ON
56412 1
ON
342
1
ON
3423
ON
56412
3
ON
56412 1
ON
342
1
ON
2
IC12
+
+
IC8
CN7
THM11
THM23
THM17
THM13
THM10
THM9
THM8
THM7
THM12
PSW4
PSW5
PSW1
PSW3
PSW2
SEG1SEG2
Y20B
YCH1
PCN7
PCN43
PCN42
PCN6
Y20C
YCH2 Y211 Y212
Y20A
PCN8PCN9
PCN10PCN22PCN27
Y20F
Y20CHG
Y20X1
Y20X2
IC7
PCN28PCN23
CN14
CN20 CN21
CN15 CN10
CN13
CN11CN12
C9
102
R14
102
R29
Q8
Q10
152152
C12
C127
Q43
+
+
C112
+
L2
C100
+
0
9
8
7
6
5
4
3
2
1
Y1
+
DSW6
DSW1
DSW5
DSW2 DSW3
R227
272
R226
103
R25
272
R20
103
Q42
IC9IC15IC16
IC17IC18
C37
C45
C35
C36
C22
C101
C108
R174 R173
102
102
IC11
C111
C114
C113
RSW1
C38
C40
C41
IC1
R49
IC5
C26
D1D4
CN18
C66
OSC
R44
R102
C52
C51
CN9
CN8
R100
R101
CN17
TB2
IC10
L3
C102
R209
LED5
C93
Z4
R3
D50
D51
Z2 Z1
C78
C77
IC3
D5
R17
LED3
C79
IC2
C82 C81
CN46
LED4
LED1
R199
DSW10
R151
EF1
CN16
TH1
103 222
102
101
103
LED2
333
333
C103
Q53
R207
220
R204
102
R205
151
R206
102
D54
PC3
IC4
D58
D56
R210
C90
C86
Z3
C84
C85
PC7
D55
TR1
000
103
103
152
L1
DM1
C126
C125
JP1
EFR1
EFS1
PCN1
R176
IC6
C21
+
D23
D20
D24
D21
R166
821
R171
103
JP4
JP5
JP3
JP6
000
R111
JP2
103
103103
103
R112
R116 R129
R140
C116
R175
R179
R177
R178
103 103
103
Q37 Q38 Q28 Q26
R114 R127 R139
C95 C92
C11
CN100
1
ON
32
DSW8
C121
PC1
PC2
THM14
R54
103
R217
CN101
E
T2
S2
R2
EFS1
EFR1
7-Segment
Display
PSW1
LED1
GND1
VCC1
3
LED5