Panasonic S-160PE1R5B Technical Data & Service Manual page 208

(3) XX-YY R.C.
Displays the outdoor unit sub-bus address which is
currently selected.
XX = Outdoor system address on main bus line (1 – 30)
YY = Outdoor unit sub-bus address (1 – 8)
"1" appears when there is only 1 outdoor unit.
<Sample displays>
A
6
01: <No. of connected indoor units>
4 units connected
Fig. 6-5
Locations where (1), (2), and (3) are displayed as
shown in Fig. 6-4.
(1)
A
A
02: < Unit Nos. 1, 2, 3, and 4 are
connected>
Fig. 6-6
6-6
(2)
LED
Fig. 6-4
(3)