Panasonic U-72MF1U9 Installation Instructions Manual page 30

CAUTION
(1) When linking outdoor units in a network, disconnect the terminal extended from the short plug (CN003, 2P Black,
location: right bottom 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. 4-1)
Outdoor unit
Indoor unit
(3) Do not install inter-unit control wiring such as star branch wiring. Star branch wiring causes mis-address setting.
(Fig. 4-2)
NO
(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.
(Branches less than 3.3 ft. are not included in the total branch number.) (Fig. 4-3)
Branch
point
16 or fewer
more than 3.3 ft.
less than 3.3 ft.
Outdoor unit
Indoor unit Indoor unit
Fig. 4-1
Outdoor unit Indoor unit
Indoor unit
Fig. 4-2
Outdoor unit Outdoor unit
Indoor unit Indoor unit
more than 3.3 ft.
Indoor unit Indoor unit
Indoor unit
Indoor unit
Fig. 4-3
30
Outdoor unit
Prohibited
Prohibited
Indoor unit
Indoor unit
Indoor unit
Branch point
Outdoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit