Electronic Automatic Control Data Flow; Electronic Automatic Control Data Flow Block Diagram - Carrier 68G5-105 Series Operation & Service Manual

1.9 ELECTRONIC AUTOMATIC CONTROL DATA
FLOW
The system is supplied with 12 and 24 vdc power from
the coach power supply. The main controller receives
input from pressure transducers, temperature sensors,
condenser and evaporator fan motor overloads, high
pressure switch, fuses. It then processes these inputs to
control output devices enabling automatic control of
12 /24 VDC
POWER
SUPPLY
INPUT
DEVICES
(Transducers,
Sensors and
HP switch)
12 VDC
POWER
SUPPLY
DRIVER
DISPLAY
Figure 1-13. Electronic Automatic Control Data Flow Block Diagram
T-312
MAIN CONTROLLER
EXPANSION
BOARD
MAIN CONTROL BOX
24 VDC
POWER
SUPPLY
temperature conditions inside the coach. The driver
display provides a communication link between the
main controller and the rest of the system. The following
block diagram (Figure 1-13) indicates data flow through
the system. Refer to section 2 for more detailed
information on the theory of operation of the control
system and see section 5 for system electrical
schematics.
24 VDC
POWER
SUPPLY
OUTPUT
DEVICES
(Solenoids,
Relays,
Clutch)
OUTPUT DEVICES
(Heater Solenoid
Valves and RAM Air
Actuators)
1-14
Fan Motors,
Compressor,
Driver Control
Box