Panasonic S-22MU1E51 Technical Data Manual page 9

3. Electrical Wiring
CAUTION
(1) When linking outdoor units in a network, disconnect the terminal extended from the short plug (CN072,
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. 2-2)
Outdoor unit
1
Indoor unit
2
(3) Do not install inter-unit control wiring such as star branch wiring. Star branch wiring causes
misaddress setting.
3
4
(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer. (Branches
less than 1 m are not included in the total branch number.) (Fig. 2-4)
5
6
16 or fewer
7
8
9
Outdoor unit
Indoor unit
Outdoor unit
NO
Outdoor unit
Indoor unit
Branch
point
Indoor unit
more than 1 m
Indoor unit
less than 1 m
Indoor unit
Prohibited
Indoor unit
Fig. 2-2
Indoor unit Indoor unit
Indoor unit Indoor unit
Branch point
Fig. 2-3
Outdoor unit
Indoor unit
more than 1 m
Indoor unit
Fig. 2-4
2-28
Design of 2WAY SYSTEM
Outdoor unit
Prohibited
Indoor unit Indoor unit
Outdoor unit
Indoor unit Indoor unit
Indoor unit Indoor unit