Komatsu Galeo PC138US-8 Shop Manual page 253

10 Structure, function and maintenance standard
Air conditioner controller
Input and output signals
AMP040-36P
Pin
Signal name
No.
1 NC
Air mix dumper actuator potentiom-
2
eter signal
Actuator potentiometer power sup-
3
ply
4 Dual pressure switch
5 NC
6 Back-up power supply
7 Blower feedback signal
8 Power transistor control signal
Mode selector actuator potentiome-
9
ter signal
10 NC
11 Internal air temperature sensor
12 Evaporator temperature sensor
13 External air temperature sensor
14 NC
15 Sunlight sensor
16 GND
PC138US, USLC-8
Input and
Pin
output sig-
No.
nals
— 17
Input 18
Output 19
Input 20
— 21
Input 22
Input 23
Output 24
Input 25
— 26
Input 27
Input 28
Input 29
— 30
Input 31
Output 32
33
34
35
36
Signal name
CAN_H
CAN_L
Internal/external air changeover
dumper actuator (A)
Internal/external air changeover
dumper actuator (B)
Air mix dumper actuator (A)
Air mix dumper actuator (B)
Mode selector actuator (A)
Mode selector actuator (B)
Relay power supply
NC
GND (sensor)
NC
NC
Test terminal
RAM monitor (for switching display)
RAM monitor I/F
RAM monitor output
NC
Compressor clutch relay
Blower main relay
SEN02552-01
Input and
output sig-
nals
Input/
output
Input/
output
Output
Output
Output
Output
Output
Output
Output
—
Input
—
—
—
—
—
—
—
Input
Input
9