Chapter 2. Explamation Of Circuit And Op- Eration Block Diagrams - IVT 12KHR-N Service Manual

12KHR-N
CHAPTER 2.
EXPLAMATION OF CIRCUIT AND OPERATION
[1] BLOCK DIAGRAMS
1. Indoor unit
DC power supply circuit
Fan motor PWM control circuit
Rotation pulse input circuit
AC clock 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
EEPROM
Select circuit
Serial I/O circuit
Auto restart circuit
Test run circuit
Auxiliary mode
Power on circuit
Cluster generator drive circuit
Louver motor drive circuit (Horizontal)
Louver motor drive circuit (Vertical, right)
Louver motor drive circuit (Vertical, left)
LED Drive circuit
Rectification circuit
Indoor fan motor
Fan motor pulse detect
Wireless remote control operation
Audible operation confirmation
Room temp. thermistor
Heat exchanger pipe thermistor
Louvre angle, fan speed
Wireless, preheat, Model select
Indoor/outdoor control signal I/O
Test run (forced operation)
Auxiliary mode button ON/OFF
Self diagnostics, fault diagnosis
Cluster generator
How direction control (Horizontal louver motor)
How direction control (Vertical louver motor,right)
How direction control (Vertical louver motor,left)
LED display
2 – 1
12KHR-N
AC power
3.15A
Fuse
Unit-unit wiring
(AC power and
serial signals)