Technibel Climatisation CAVM93R5TA Manuel D'installation page 20

(3) Special cautions on wiring
Use shielded wires for inter-unit control wiring (c) and ground
the shielded on both sides.
All wiring except inter-unit control wiring (c) has polarity.
Otherwise misoperation due to noise may be generated at
times.
When linking outdoor units in a network (S-net link system),
remove the short plug (CN4, 2P Black, location: near CPU
on the outdoor control PCB) from all outdoor units except
EG
one . Otherwise the communication of S-net link system
does not perform.
In case of no link system (No connection wiring between
outdoor units), do not remove the short plug.
Do not wire the inter-unit control wiring such as loop wiring
(Fig. below)
Outdoor unit
Indoor unit
Do not install the inter-unit control wiring such as branch
wiring.
Star branch wiring causes mis-address setting.
Outdoor unit
NG
If branching the inter-unit control wiring, the No. of branch
point should be 10 or less.
(The branch length less than 1 m does not include the branch
No.)
Branch
point
10 or less
more than 1 m
less than 1 m
Outdoor unit
Indoor unit Indoor unit
Indoor unit
Indoor unit
Outdoor unit Outdoor unit
Indoor unit Indoor unit
more than 1 m
Indoor unit Indoor unit
Indoor unit
Indoor unit
Outdoor unit
Prohibited
Indoor unit
Outdoor unit
NG
Indoor unit
Indoor unit Indoor unit
Indoor unit Indoor unit
Branch point
Outdoor unit
Indoor unit
Indoor unit
19
Shielded wire
CN4
Prohibited
Indoor unit
0192_M_I
0824_M_I
Indoor unit
Indoor unit
0193_M_I