Block Diagram - Hitachi RAC-18WPE Service Manual

BLOCK DIAGRAM

MODEL RAC-18/25/35/4 2/50WPE
Power source
L
N
1
2
Indoor
unit
Indoor / Outdoor
interface circuit
3
Overheat thermistor
Defrost thermistor
Outdoor temperature
thermistor
EEPROM
Oscillator clock
circuit
OUTDOOR UNIT
Power circuit
Control power circuit
Reset circuit
Is
(AX-16G814)
series
16
Compressor
drive circuit
Outdoor DC fan motor
drive circuit
Ip
Id
Ip
Id
Reversing valve
drive circuit
Relay drive circuit
Electric expansion
valve drive circuit
Compressor
motor
Outdoor
Fan motor
Reversing valve
Electric expansion
valve