Panasonic U-26PE1U6 Technical Data & Service Manual page 204

7-31. When Setting Indoor Unit Control PCB Switch for Wall Mounted Indoor Unit
When using both the wired and wireless remote controller, refer to the procedure below.
If this setting is not made correctly an alarm will occur. (The operation lamp on the display blinks.)
This setting is not necessary for the case of using wireless remote controller only.
The slide switch setting at the time of factory shipment for model Type K1 is "B".
S-26PK1U6
1
When using wired remote controller as "sub", to set its
data to "sub" in remote controller setting mode.
When using wireless remote controller as "sub", set the
switch on the indoor unit control PCS to A.
When using
wireless
A
remote
controller
as "sub"
When using
wireless
remote
B
controller
as "main"
1-196
1. Specifications
Nos. 1, 2 OFF, No. 3 ON.
Nos. 1, 2, 3 all OFF