Chapter 2. Explanation Of Circuit And Op- Eration Block Diagrams - Sharp AY-XPC18LR Service Manual

CHAPTER 2.
AYXPC18LR
EXPLANATION OF CIRCUIT AND OPERATION
[1] BLOCK DIAGRAMS
1. Indoor unit
DC power supply circuit
Fan motor phase control circuit
Rotation pulse input circuit
AC clock circuit
Louvre motor drive circuit
Remote controller signal reception circuit
Buzzer drive circuit
CPU reset circuit
CPU oscillator circuit
CPU
Room temp. detect circuit
Heat exchanger pipe thermo circuit
Compensation circuit/ select circuit
Compensation circuit
Switchover circuit
Serial I/O circuit
Compressor relay drive circuit
LED drive circuit
Auto restart circuit
Test run circuit
Auxiliary mode
Power on circuit
Cluster generator drive circuit
Service Manual
Indoor fan motor
Fan motor pulse detect
Flow direction control
Wireless remote control operation
Audible operation confirmation
Room temp. thermistor
Heat exchanger pipe thermistor
Blower temperature, fan speed, model select
Outdoor ratings
Wireless, preheat
Indoor/outdoor control signal I/O
Outdoor unit power supply on/off control
LED display
Test run (forced operation)
Auxiliary mode button ON/OFF
Self diagnostics, fault diagnosis
Cluster generator
2 – 1
AYXPC18LR
2.5A
FUSE1
Unit-unit wiring
(AC power and
serial signals)