Printed Circuit Board (Pcb) Layout - Hitachi RUA-13AT3S Instruction Manual

3.3 Printed Circuit Board (PCB) Layout (RUA-30AT3S only)
All DSW were set correctly at factory, do not change settings of DSW. The following figures are only for
reference in installation. After installation, make sure all DSW were set as factory setting.
3.3.1 PCB Drawing
The PCB in the Unit is operating with 3 types of DIP switches. The location is as follows:
Mark
CT1 Current Transformer for NO.1 Compressor
CT2 Current Transformer for NO.2 Compressor
CT3 Current Transformer for NO.3 Compressor
CN6 Connector for Transformer Input
CN7 Connector for Transformer Output
3.3.2 Factory Setting of Dip Switch (DSW)
DSW1: Capacity Settings
Setting
Position
DSW2: Optional Function Settings (1)
Setting
Position
Name of Parts
ON
1 2 3 4
ON
1 2 3
ELECTRICAL WIRING
Mark
DSW1 Dip Switch for Capacity Setting
DSW2 Dip Switch for Optional Function Setting (1)
DSW3 Dip Switch for Optional Function Setting (2)
L,M Terminal for Different Main Power Supply
A,B,D,E,F Terminal for Room Thermostat
DSW3: Optional Function Settings (2)
ON
Setting
Position
1
Name of Parts
2 3 4
5