Printed Circuit Board (Pcb) Layout - Hitachi RUA-NP4ATS Instruction Manual

3.3 Printed Circuit Board (PCB) Layout

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 4 types of DIP switches. The location is as follows:
1
1 2 3
R S
Mark
CT1-R,S,T Current Transformer for NO.1 Compressor
CT2-R,S,T Current Transformer for NO.2 Compressor
CN6 Connector for Transformer Input
CN7 Connector for Transformer Output
SW1 Switch for Alarm History Checking
3.3.2 Different Main Power Supply
When the main power supply is 380V (nominal voltage), be sure to change the wiring connected terminal
from L to M as shown figure below.
1
R
1 2 3 4 1 3 4 2
CN6
T
L
N
Name of Parts
PCB
S T
L M
N
For 415V
SEG1
1 3 4 2
CN7
M A B D E F
Mark
DSW1 Dip Switch for Capacity Setting
DSW2 Dip Switch for Optional Function Setting (1)
L,M Terminal for Different Main Power Supply
A,B,D,E,F Terminal for Room Thermostat
SEG1 Indicator for Information
ELECTRICAL WIRING
CT4-R CT4-S CT4-T
CT3-R CT3-S CT3-T
CT2-R CT2-S CT2-T
CT1-R CT1-S CT1-T
LED1
Name of Parts
1
PCB
R S T
L M
N
For 380V
5