![background image](http://html.mh-extra.com/html/ivt/12khr-n/12khr-n_service-manual_2097775006.webp)
12KHR-N
2 – 2
2. Outdoor unit
CPU
20A
protection
15A
protection
Expansion valve drive circuit
Expansion valve
Suction temp. thermo. circuit
Suction pipe thermistor
2-way valve temp. thermo. circuit
2-way valve thermistor
3.15A
protection
15A
protection
Power supply circuit
CPU oscillator circuit
DC overvoltage detection circuit
Outdoor fan drive circuit
4-way valve relay drive circuit
Power transistor module drive circuit
Serial I/O circuit
CPU reset circuit
Position detection circuit
AC overcurrent detection circuit
Compressor thermo circuit
Heat exchanger pipe thermo circuit
Outdoor temp. thermo. circuit
LED drive circuit
Test mode circuit
Power factor
converter circuit
Filter
circuit
Smoothing
circuit
Pulse amplitube modulation circuit
EEPROM
AC clock circuit
DC overcurrent detection circuit
IGBT
Unit-unit wiring (AC power
and serial signals)
Outdoor fan
4-way valve
Power transistor module
Compressor
Current transformer
Compressor thermistor
Heat exchanger pipe thermistor
Outdoor temperature thermistor
LED
Terminal board, Terminal fuse, circuit
Terminal board, Terminal fuse