41
Communication Cable
Install communication cable while paying attention to the following.
For the combination units, DSW settings of Main and Sub.
● An alarm occurs if the communication cables between main water source unit and sub water source
units are connected to the terminals 1 and 2 for HI-NET system.
● If an alarm is triggered on the LCD of main water source unit, follow the "7-segment" display at the
main water source unit for verification purposes
● Perform a function setting at the main water source unit.
● Maximum number of refrigerant groups with one central controller is 64 (for HI-NET II).
Maximum number of indoor units to be connected is 160 (for HI-NET II).
(8) Connect the following communication cables to the terminals 1 and 2 on terminal block (TB2) in the
water source unit A (main unit).
• between water source unit and indoor unit
• between water source unit and switch box
• between water source unit and water source unit in other refrigerant systems
(9) Do not connect the power supply wiring to the terminal block for communication cable (TB2).
All the printed circuit boards in the same refrigerant system will be damaged.
(10) For a Heat Recovery System, connect the communication cables from indoor unit exclusively used for
cooling to the terminals 1 and 2 on TB2 in the switch box.
(11) Connect the ground wiring to the water source unit/indoor units and switch box. The ground
wiring work under the condition of 100
W
(max.) ground resistance must be performed by an authorized
personnel.
Water Source Unit
Refrigerant Group 1 (Heat Pump System)
Refrigerant Group 2 (Heat Recovery System)
TB
2
1 2 3 4
TB
1
TB
2
B A
2 1
Unit No. 0
TB
2
TB
1
TB
2
TB
1
TB
2
1 2 3 4
1 2 3 4
1 2 3 4
Switch Box No.2
Switch Box No.1
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
Communication Cable
for HI-NET System
Communication Cable for Switch Box ~ Indoor Unit
L
2
L
1
TB
1
TB
2
B A
2 1
Unit No. 2
L
2
L
1
TB
1
TB
2
B A
2 1
Unit No. 1
L
2
L
1
TB
1
TB
2
B A
2 1
Unit No. 2
L
2
L
1
TB
1
TB
2
B A
2 1
Unit No. 0
L
2
L
1
TB
1
TB
2
B A
2 1
Unit No. 1
L
2
L
1
L
1
R
L
2
S
L
1
R
L
2
S
Water Source Unit
Summary of Contents for AVWW-114FKFW
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