Panasonic U-8LE1R8 Installation Instructions Manual page 27

CAUTION
(1) When linking outdoor units in a network, see the section "ATTENTION!".
(2) Do not install the inter-unit control wiring in a way that forms a loop.
Outdoor unit
Indoor unit
(3) Do not install the inter-unit control wiring such as star branch wiring. Star branch wiring causes mis-address setting.
Outdoor unit
NO
(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
Indoor unit
Outdoor unit Branch point
Outdoor unit
Outdoor unit
Outdoor unit
Prohibited
Indoor unit Indoor unit
Indoor unit
Indoor unit
Branch point
Indoor unit
Indoor unit
Indoor unit
27
Prohibited
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit