Panasonic S-18MK2U6 Installation Instructions Manual page 16

CAUTION
(1) When linking outdoor units in a network, disconnect the terminal extended from the short plug (on the outdoor main
control PCB) from all outdoor units except any one of the outdoor units.
(When shipping: In shorted condition.)
For a system without link (no connection wiring between outdoor units), do not remove the short plug.
(2) Do not install the inter-unit control wiring in a way that forms a loop. (Fig. 4-3)
Outdoor unit
Indoor unit
(3) Do not install the inter-unit control wiring such as star branch wiring. Star branch wiring causes misaddress setting.
(Fig. 4-4)
(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.
Central Controller
Outdoor unit
Indoor unit
Indoor unit
Outdoor unit Indoor unit
NO
Indoor unit
Outdoor unit : Branch point
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Prohibited
Indoor unit
Indoor unit
Indoor unit
Branch point
Indoor unit
Indoor unit
Indoor unit
16
Prohibited
Indoor unit
Fig. 4-3
Fig. 4-4
Indoor unit
Indoor unit
Indoor unit
Fig. 4-5