Hitachi RAS-14EH2 - Block Diagram

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Wireless receive
circuit
Filter.
Operation.
Timer.
Auto sweep motor for
Air deflector
Remote controller
Heat exchanger
thermistor
Room temperature
thermistor
Reset circuit
Initial setting circuit
Temporary switch
Outdoor microcomputer (AX-8T11)
RAS-14EH2 / RAC-14EH2MODEL
Indoor microcomputer (AX-7R13)
BLOCK DIAGRAM
INDOOR UNIT OUTDOOR UNIT
POWER RELAY
POWER
SWITCH
Inrush current
Protection circuit
HARMONICS
IMPROVEMENT
CIRCUIT
IPM
Rotor magnetic
pole position
detection circuit
lp
ld
ls
Buzzer circuit
Indicating lamp
Indoor/Outdoor
interface circuit
DC fan motor drive
circuit
Microcomputer clock
circuit
Indoor DC
fan motor
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
Power source
1ø 50Hz 220-230V
07K394_RAS-14EH2_022_A3_E 2007.10.31, 16:4422