Hitachi RAS-25SX8 Manuel De Maintenance page 75

BLOCK DIAGRAM
MODEL RAS-25SX8 / RAC-25SX8
RAS-35SX8 / RAC-35SX8
Power source
1 φ AC220V-230V
50Hz
Control
Power circuit
Reset circuit
Wireless remote Wireless receive
controller
circuit
Room temperature
thermistor
Heat exchanger
thermistor
Humidity sensor
Dirt sensor
EEPROM
Oscillator clock
circuit
Front panel
OPEN / CLOSE
Detection switch
Cleaning unit
position detection
switch
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INDOOR UNIT
Inrush current
Protection circuit
Power relay
Indoor / Outdoor
interface circuit
DC fan motor
FM
Indoor DC fan motor
drive circuit
Two way valve
drive circuit
・ Operation.
Indicating lamp ・ Timer.
・ Monitoring
・ Cleaning
Buzzer circuit ・ Mist, air purification
Cleaning unit driving
motor dribe circuit
Ｍ
Ｍ
Ｍ
Ｍ
(AX-7Y20)
Ｍ
High-voltage
generating drive
circuit
Peltier drive
circuit
manuals search engine
OUTDOOR UNIT
A
B
Indoor / Outdoor
interface circuit
C
Two way valve
Overheat thermistor
Ｍ Defrost thermistor
Cleaning unit driving motor
Outdoor themperature
thermistor
Motor for small vertical vane
Motor for big vertical vane
EEPROM
Motor for left lateral vane
Motor for right lateral vane
Oscillator clock
circuit
Motor for front panel
Ion mist unit
High-voltage
generator electrode
Peltier
PAM
Compressor
Power circuit
drive circuit
Control power circuit
Reset circuit
Ip
Is
Id
Ip
Id
Latch-type
reversing valve
drive circuit
Relay drive circuit
(AX-8W00)
Electric expansion
valve drive circuit
– 83 –
Ｍ
DC compressor
motor
Outdoor DC fan motor
drive circuit
Ｍ
Outdoor
DC fan motor
Latch-type reversing valve
Ｍ
Electric expansion
valve