Block Diagram - Hitachi RAK-18NH6 Service Manual

RAK-18NH6, RAK-25NH6, RAK-35NH6, RAK-50NH6
INDOOR UNIT 1
Wireless receive
LCD wireless
circuit
Room temperature
thermistor
Heat exchanger
thermistor
Temporary switch
Initial setting circuit
Reset circuit
INDOOR UNIT 2
Wireless receive
LCD wireless
circuit
Room temperature
thermistor
Heat exchanger
thermistor
Temporary switch
Initial setting circuit
Reset circuit
L
N
Filter.
Outdoor
Operation.
unit
Timer.
Terminal
board
Auto sweep motor for
Air deflector
Filter.
Operation.
Timer.
Auto sweep motor for
Air deflector C1
D1
C2
D2
Trip signal
synthesis circuit
Indoor 1/Outdoor
interface circuit
Indoor 2/Outdoor
interface circuit
SPM2
Electric
Expansion
valve
Electric Expansion valve
drive circuit
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