Panasonic U1 Serie Instructions D'installation page 14

CAUTION
(1) When linking the outdoor units in a network, disconnect the terminal extended from the short plug from all outdoor units
except any one of the outdoor units.
(When shipping: In shorted condition.)
For a system without link (no wiring connection 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 inter-unit control wiring such as star branch wiring. Star branch wiring causes mis-address setting. (Fig. 4-4)
(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. (Fig. 4-6)
Connect wiring as shown in Section "4-3. Wiring System
Diagrams".
Shielded wire
Ground
(6) • Connecting cable between indoor unit and outdoor
unit shall be approved polychloroprene sheathed 5 or
2
3 *1.5 mm flexible cord. Type designation 60245 IEC
57 (H05RN-F, GP85PCP etc.) or heavier cord.
• 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
Outdoor unit
NO
Outdoor unit
Outdoor unit
Outdoor unit
Ground
Fig. 4-6
Outdoor unit
Prohibited
Indoor unit
Indoor unit
Indoor unit
: Branch point
Indoor unit
Indoor unit
Indoor unit
WARNING
Loose wiring may cause the terminal to overheat or
result in unit malfunction. A fire hazard may also occur.
Therefore, ensure that all wiring is tightly connected.
When connecting each power wire to the terminal, follow the
instructions on "How to connect wiring to the terminal" and
fasten the wire securely with the terminal screw.
14
Prohibited
Indoor unit Indoor unit
Indoor unit
Indoor unit
Branch point
Indoor unit
Indoor unit
Indoor unit
Fig. 4-3
Fig. 4-4
Indoor unit
Indoor unit
Indoor unit
Fig. 4-5