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ELECTRICAL WIRING
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.
PCB Drawing
The PCB in the Unit is operating with 4 types of DIP switches. The location is as follows:
Mark
CT1-R,S,T Current Transformer for NO.1 Compressor
CT2-R,S,T Current Transformer for NO.2 Compressor
CT3-R,S,T Current Transformer for NO.3 Compressor
CT4-R,S,T Current Transformer for NO.4 Compressor
CN6
Connector for Transformer Input
CN7
Connector for Transformer Output
SW1
Switch for Alarm History Checking
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
PCB
R
For 415V
11
Name of Parts
S
T
L
M
N
Mark
DSW1
Dip Switch for Capacity Setting
DSW2
Dip Switch for Optional Function Setting (1)
DSW3
Dip Switch for Optional Function Setting (2)
DSW4
Dip Switch for Optional Function Setting (3)
L,M
Terminal for Different Main Power Supply
A,B,D,E,F Terminal for Room Thermostat
SEG1
Indicator for Information
1
PCB
R
S
T
N
For 380V
Name of Parts
L
M
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