Ras-12Hn(P/C) - Hitachi RAS-(3-6)HVNC1(E) Service Manual

5 Control System
5.2.6 RAS-12HN(P/C)
Connector indication
R1,N1,R2,
Power supply and reverse phase detection
S2,T2
PCN5 Crankcase heater of compressor (oil)
PCN7 Solenoid valve
PCN8 High pressure switch protection
PCN9 Compressor contactor
PCN10 Low pressure switch protection
PCN14 Solenoid valve (RAS-12HNP only)
PCN100 4-way solenoid valve
PCN401 Power supply
PCN402 Solenoid valve for hot gas bypass
PCN404 Motor for fan 2
PCN405 Capacitor
PCN406 Power connection between PCB1 and PCB3
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 outdoor to indoor unit
CN100 Discharge pressure (Pd)
143
SMGB0087 rev.0 - 12/2013
PCB1
EF1
L2
C8
C7
JP1
Connector indication
CN102 Transmission between PCB1 and PCB3
CN404 Line connection between PCB1 and PCB3
CN406 Motor for fan 1
EF1,2,3
EFR1,2 Power protection
EFS2
Switch indication
DSW1 Test run
DSW2 Auxiliary function setting
DSW3 Capacity code
DSW4/
Refrigerant cycle number
RSW1
DSW5 Switch
DSW6 Switch
LED indication
LED1 Red Power source for the PCB1
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 outdoor unit
LED4 Red Power source at 280V for the PCB1
PCB3 Connector indication
Connector
PCN201 Power supply
PCN202 Power connection between PCB3 and PCB1
CN201 Line connection between PCB3 and PCB1
CN202 Line connection between PCB3 and PCB1
EFR1 Power protection
PCB3
TAB4
TAB3
Name
5