Printed Circuit Board; Rasc-(4-6)Hnpe - Hitachi RASC-4HNPE Service Manual

4 Electrical and control settings

Printed circuit board

4.5 Printed circuit board

4.5.1 RASC-(4-6)HNPE

Connector indication
R1,N1,R2, Power supply and reverse phase detection
S2,T2 (3N~ only)
PCN5 Crankcase heater of compressor (oil)
PCN7 Solenoid valve
High pressure switch protection, variable
PCN8 frequency driver alarm, internal thermostat
protection of the motor and float switch.
Magnetic contactor for compressor and
PCN9
magnetic contactor for fan
PCN10 Low pressure switch protection
PCN14 Solenoid valve
PCN100 4-way solenoid valve
PCN406 Power connection between PCB1 and DIP-IPM
THM7 Outdoor air temperature thermistor
THM8 Pipe evaporation temperature thermistor
THM9 Compressor discharge temperature thermistor
CN1 Input function
CN2 Demand input
CN5A Micro electronic expansion valve
CN6 Transmission between PCB1 and DIP-IPM
CN7 External output
CN8 Transmission from RASC to indoor unit
CN10 Communication line between PCB1 and PCB3
CN100 Discharge pressure (Pd)
CN404 Line connection between PCB1 and DIP-IPM
EF1,2,3
Power protection
EFR1
64 SMGB0091 rev.2 - 11/2015
Switch indication
DSW1 Test run
DSW2 Auxiliary function setting
DSW3 Capacity code
DSW4/RSW1 Refrigerant cycle number
DSW5 End terminal resistance
DSW6 Simultaneous / individual operation
PSW1 Forced defrosting
PSW2
Checking mode ()
PSW3
Checking mode ()
LED indication
LED1 Red Power source for the PCB
This LED indicates the transmission status
LED2 Green
between the indoor unit and the RCS
This LED indicates the transmission status
LED3 Yellow
between the indoor unit and the RASC unit
LED4 Red Power source at 280V for the PCB