Hitachi RAC-25RPA - Page 35

BLOCK DIAGRAM
MODEL RAF-25RPA / RAC-25FPA
INDOOR UNIT
FM
Buzzer circuit Indicating lamp
Filter. Operation. Timer.
Auto sweep motor 1
M
Indoor microcomputer (AX-12C720)
Indoor DC fan motor
Indoor / Outdoor interface circuit
Heat exchanger thermistor
Room temperature thermistor
Wireless receive circuit
DC fan motor drive circuit
Microcomputer clock circuit
Initial setting circuit
Reset circuit Temporary switch
Wireless remote control
C D
C D
Outdoor microcomputer (AX-12C820)
OUTDOOR UNIT
POWER RELAY
Inrush current
Protection circuit
HARMONICS
IMPROVEMENT
CIRCUIT
IPM
Rotor magnetic
pole position
detection circuit
lp
ld
ls
Overheat thermistor
Defrost thermistor
Outdoor temperature thermistor
Indoor/Outdoor interface circuit
Reversing valve coil
Power circuit
Reset
circuit
Outdoor DC fan motor
RECTIFIER
DC compressor
motor
Relay drive circuit
Electric expansion valve
Reversing valve
control circuit
RAF-35RPA / RAC-35FPA
35