Hitachi RAS-4HRNME-AF - Indoor Unit

10. Electrical wiring
TCGB0075 rev.0 - 11/2012
119
10
10.3.2 Indoor unit
PCB1 PCB2
PCB1
Connector Indications
Name Connector Nº
Power
Power supply PCN1
Devices power supply PCN2
Input transformer power supply (230v) PCN3A,B
Ouput transformer power supply (24v) CN10A,B
LCD Power supply CN15
Protection
Device
Low Water Pressure & Water Flow control PCN10-1
Transmis-
sion
H-Link communication CN1
PCB1-PCB2 communication CN2,5,6,9
External
Input /
Output
THMswp (Swimming pool temperature) CN3
THMamb2 (2nd ambient temperature) CN4
Indoor expansion valve (EVI) CN7a
THMswp/amb2 power supply CN14
Room thermostat (ON/OFF) PCN6-1
Water pump 1 PCN7-5
3-way valve swimming pool output PCN8-1
3-way valve DHW output PCN8-3
Mixing valve second temperature left PCN9-5
Secondary pump output (WP2) PCN9-3
Secondary pump output (WP3) PCN9-1
Swimming pool input PCN10-5
Electrical Tariff input PCN10-3
Solar input PCN7-1
Mixing valve second temperature right PCN12-3
PCB2
Connector Indications
Name Connector Nº
Actuator
Boiler signal / Heater signal PCN1
Boiler signal / Heater signal PCN2
DHWT heater signal PCN3
Solar signal PCN4
Transmis-
sion
PCB1-PCB2 communication CN1,2,3,4
A/D Input
Water inlet Thermistor (THMwi) CN9
Water sanitary tank thermistor (THM
DHW
) CN10
Liquid 410A Thermistor (THMl) CN11
Gas 410A Thermistor (THMg) CN12
Water outlet Thermistor (THMwo) CN13
Boiler / heater Thermistor (THMwo3) CN14
Circuit 2 Thermistor (THMwo2) CN16
PCB1
Switch indication
Name Connector No.
Operation
/ Display
Additional setting DSW1
Capacity Setting DSW2
Optional functions DSW3
Optional functions DSW4
Additional setting DSW5
H-link (transmission) DSW6
Not used DSW7
Not used
DSW8
DSW9
Refrigerant unit address
RSW1
RSW2
Indoor unit address
RSW3
RSW4
Checking Mode (Forward) PSW1
Checking Mode (Back) PSW2
PCB1
LED indication
Name Connector No.
LEDS
7-segment SEG1,2,3,4,5
Water Pump operation LED1
Heater or Boiler operation LED2
DHW Heater operation LED3
Heat pump operation
(compressor 1)
LED4
Power supply in the unit LED5
Alarm (Flickering with 1
sec interval)
LED6
Not used LED7
H-Link transmission LED8