IVT 12PHR-N - Basic Operation; Mode and Temperature Settings; Fan Speed Control; Auto Mode Operation

2-2
12PHR-N
CPU
AC clock circuit
Pulse amplitude modulation circuit IGBT
Power supply circuit
Smoothing
circuit
Power factor
converter circuit
Filter
circuit
Unit-unit wiring (AC
powewr and serial
signals)
CPU oscillator circuit
DC overvoltage detection circuit
Outdoor fan drive circuit Outdoor fan
4-way walve relay drive circuit 4-way valve
DC overcurrent detection circuit
Power transistor module drive circuit Power transistor module
Serial I/O circuit
CPU reset circuit
Position detection circuit Compressor
AC overcurrent detection circuit Current transformer
Compressor thermo circuit Compressor thermistor
Heat exchanger pipe thermistor circuit Heat exchanger pipe thermistor
Outdoor temp thermo circuit Outdoor temperature thermistor
EEPROM
LED drive circuit LED
Test mode circuit
Expansion valve drive circuit Expansion valve
Suction temp,thermo,circuit Suction pipe themistor
2-way walve temp,thermo,circuit 2-way valve themistor
Terminal board,Terminal fuse,circuit Terminal board,Terminal fuse
Select Circuit MAX f, Winter Cool
20A
protecition
15A
protecition
2. Outdoor unit
3.15A
protecition
12PHR-N_S530612PHRN.indd 2 2013/8/7 15:41:59