York EVHC 09 DSAAAR Service Manual page 23

Schematic Diagram
• BOTTOM VIEW
PIN
1
2
3
4
5
6
7
8
9
10
12
13
14
16
17
18
19
20
22
23
24
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
46
47
48
Outdoor unit pin definition
Definition
pin
JTAG
Memory
Digital ground
+3.3V
Fan motor PWM output
Module protection signal input
Memory
Phase-locked loop
Phase-locked loop
+3.3V
Power supply control output
Auxiliary heat control output
Four-way valve control output
Zero crossing detection
signal input
Communication sending
Communication receiving
Digital ground
+3.3V
Indicator output
PFC Protection signal input
PFC driving level output
Indicator output
Electronic expansion valve driving signal
PWM
Signal output
Digital ground
+3.3V
PWM Signal output
Electronic expansion valve driving signal
PWM Signal output
Digital ground
+3.3V
PWM Signal output
PWM Signal output
Electronic expansion valve driving signal
PWM Signal output
+5.0V
Digital ground
+3.3V
Fan motor control singal output
Definition
PIN
Quick test
49
Overload protection singal input
50
Models selection port
25/35
51
Digital ground
53
54 +3.3V
Fan motor speed feedback input
56
Digital ground
58
59 +3.3V
Electronic expansion valve driving signal
60
JTAG Pin
61
JTAG
62 Pin
63 Digital ground
64 +3.3V
U phase current sampling input
67
W phase current sampling input
68
V phase current sampling input
69
Air exhaust sampling input
70
Ambient temperature sampling input
71
Air intake sampling input
72
Tube temperature sampling input
73
Current sampling input
74
Bus voltage sampling input
75
Electronic valve temperature
76
sampling input
Digital ground
81
82 +3.3V
83 +3.3V
Digital ground
84
Indicator output
86
Crystal oscillatory pin input
87
Crystal oscillatory pin input
88
Digital ground
90
91 +3.3V
Reset signal
93
JTAG
94
Pin
JTAG Pin
96
Digital ground
97
98 +3.3V
JTAG Pin
99
JTAG
100
Pin
143