Hitachi RAC-70DH7 - Block Diagram

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BLOCK DIAGRAM
MODEL RAD-50DH7A/RAC-50DH7
RAD-60DH7A/RAC-60DH7
RAD-70DH7A/RAC-70DH7
Electric Expansion valve
drive circuit
Electric
Expansion
valve
Outdoor microcomputer / HIC (AX-6V01)
Trip signal
synthesis circuit
L
N
SPM2
Outdoor
unit
Terminal
board
DC35V
Power
circuit
Noise filter
A
B
A
B
Drain pump motor
Wired remote control
receiver circuit
Wired remote control
Room temperature thermistor
Heat exchanger thermistor
Static pressure select switch
Drain pump test switch
Temporary switch
Initial setting circuit
Reset circuit
H-link
Indoor microcomputer ( AX-7X20 )
Buzzer circuit
Indicating lamp
Operation
Timer
Power circuit
Indoor/Outdoor interface circuit
Indoor fan motor
DC fan motor drive circuit
Wireless remote control
receiver circuit
Wireless remote
control
Option parts
Micro computer clock
circuit