Hitachi RCI-4.0FSR - Printed Circuit Board For DX-Interface (Pi073)

4 Control system
Printed circuit board for complementary systems
SMGB0137 rev.0 - 05/2021
89
4
4.10.2 Printed circuit board for DX-Interface (PI073)
FUSE
PCB1
PCB2
PCB1 LED indicator
LED1 Red
This LED indicates the transmission
status between the indoor unit and the
remote control.
LED3 Yellow
This LED indicates the transmission
status between the indoor unit and the
outdoor unit.
LED4 Green PCB power supply
PCB2 LED indicator
LED1 Yellow H-LINK transmission external
LED2 Green PCB power supply
LED3 Yellow
H-LINK transmission internal (between
PCBs)
PCB1 Connector indication
PCN1 230V transformer
PCN2
Terminal board 1 (TB1) (19-20) Internal thermostat
for indoor unit fan motor
PCN6
Terminal board 1 (TB1) (11-12) Motor for drain
discharge mechanism
PCN7
Terminal board 1 (TB1) (1-2) and PCB2 power
supply
PCN10 Terminal board 1 (TB1) (13-14)
PCN11 Terminal board 1 (TB1) (15-16)
THM1 Coil inlet thermistor
THM2 Coil outlet thermistor
THM3 Liquid pipe thermistor
THM5 Gas pipe thermistor
CN1 Transformer 12V
CN2 TB2 (19-20) and PCB2
CN11 TB1 (3-8) Expansion valve
CN14 TB2 (15-16) Flow switch
EFR1 Power supply fuse
EF2 PCB fuse
EF3 Fuse for PCN5 connector
PCB2 Connector indication
PCN1 TB1 (1-2) and PCB1
THM1 Optional air temperature sensing
THM2 Optional air temperature sensing
CN1 TB2 (17-18) and PCB1
CN2 TB2 (12-14) Duty V (0~10 V)
CN3 TB2 (1-3) Duty A (1~20 mA)
CN4 TB2 (4-5) CO
2
option ON/OFF
CN5 TB2 (6-8) EC fan motor (Top)
CN6 TB2 (9-11) EC fan motor
EF1 PCB2 fuse
Switch indication
DSW1 Optional functions
DSW2 End resistance
DSW3 Capacity code
DSW4 Unit model code
DSW5,
RSW2
Refrigerant cycle number setting
DSW6,
RSW1
Indoor unit number setting
DSW7 Fuse recovery