Sharp AY-X9PSR - Chapter 2. Explanation of Circuit and Operation; 1. Block Diagram (Indoor Unit)

SHARP(CHINA)INVESTMENT CO., LTD
CHAPTER 2.EXPLAMATION OF CIRCUIT AND OPERATTION
[1] BLOCK DIAGRAM
1. INDOOR UNIT
CPU
of
indoor
control
unit
Overcurrent detection
Unit-unit wiring (AC
power and serial
signals)and serial
signals)
Fan speed detection
Transformer
LEV
EEPROM
Room Temp detection circuit
IDU pipe temp detection circuit
Model jumper
LED Display driver
Indoor fan drive circuit
Model selection
IDU pipe temp thermisto
r
Buzzer drive circuit
LEV drive circuit
3.15A fuse
Room temp thermisto
r
Buzzer
Indoor fan motor
Auxiliary driving circuit Auxiliary circuit
Outdoor Power control Power on relay of outdoor unit
Anion driving circuit Anion circuit
Power Supply+15V
Reset circuit
DC+5V
Zero-crossing detection
LED display board
Indoor/outdoor control
2-1