Outdoor Units Pcb; Ras-(2-2.5)Hvnp / Ras-3Hvnc - Hitachi RAS-2-HVNP Service Manual

5. Control System

5.2 Outdoor units PCB

5.2.1 RAS-(2-2.5)HVNP / RAS-3HVNC
PCB1
PCB1 Connector indication
Connector
PCN5 Crankcase heater of compressor (oil)
PCN6 Reversing valve relay
PCN13 Pressure switch control
PCN401 High pressure switch protection
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
CN8 Transmission from outdoor unit to indoor unit
CN17 Transmission to PCB2
CN22 Transmission to IPM
CN24 Motor for outdoor fan
CN25 For inspection
CN26 For inspection
PCB1 Switch indication
Connector
DSW1 No setting
DSW2 Auxiliary function setting
DSW3 Capacity code
DSW4/
Refrigerant cycle number
RSW1
DSW5 Switch
DSW6 Switch
PSW2
Available optional function. Setting can be se-
lected using the 7-segment display
PSW3
PSW351 The inverter micro-computer checking
120
SMGB0079 rev.0 - 01/2013
Name
Name
PCB2
PCB1 LED indication
LED Colour
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 outdoor unit
LED351 Red For inspection
LED353 Red For inspection
PCB2 Connector indication
Connector
CN21 Transmission to PCB1
CN301 Transmission to PCB1
PCB2 LED indication
LED Colour
LED1 Red
LED2 Red
These LEDS indicate the cause of unit
stoppages
LED3 Red
LED4 Red
PCB2 Switch indication
Connector
DSW301 Test run
Manual defrost operation switch. The defrost option
PSW1
is manually available under the forced defrost area
Name
Name
Name
Name