System Diagram - Hitachi YUTAMPO Series Service Manual

3 Control functions

System diagram

3.1 System diagram
Thermistor for DHW
A+D conversion circuit
YUTAMPO
L
Relay drive circuit
N
Input 1
Option signals
AR1
Indoor unit
16 SMGB0135 rev.0 - 06/2020
PC-ARFTE
LCD controller
Transmission circuit
1
2
3
Inputs drive circuit
Input 3 Output 1 Output 2
Input 2 Output 3 Output 4
Symbol
AR1 Electrical heater Domestic Hot Water tank output
Input 1~3 Optional inputs
Output 1~4 Optional outputs
RVR 4-way valve
Mv Electric expansion valve
MC Compressor motor
MF Outdoor fan motor
~
L
N
1
Power circuit
2
3
Control power circuit
Indoor/Outdoor
Reset circuit
interface circuit
Outdoor
microcomputer
Electrical control
Relay drive
expansion valve
circuit
drive circuit
Mv
Outdoor unit
Name
Multiple signals
Single signals
Power
Compressor drive
circuit
MC
Outdoor DC fan motor
drive circuit
MF
Overheat thermistor
Defrost thermistor
OutdoorTª thermistor
EEPROM
Oscillator clock circuit
Reversing valve
drive circuit
RVR