Panasonic U-8MF3R7 Installation Instructions Manual page 33

CAUTION
(1) When linking outdoor units in a network, see 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
(5) Use shielded wires for inter-unit control wiring (C) and ground the shield
on both sides, otherwise misoperation from noise may occur.
Connect wiring as shown in the section "4-3. Wiring System Diagram."
(6) Use the standard power supply cables for Europe (such as H05RN-F or H07RN-F which conform to CENELEC (HAR)
rating specifications) or use the cables based on IEC standard. (60245 IEC57, 60245 IEC66)
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 Indoor unit
Indoor unit Indoor unit
(Functional earthing)
33
Prohibited
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Shielded wire
(Functional earthing)