Panasonic S-3650PU3E Technical Data & Service Manual page 240

E12 Automatic Address Setting Start is Prohibited While Auto-address Setting in Progress.
1. Error Detection Method
It is judged an error if a command to start auto address setting comes from another controller during auto address setting.
This occurs in a system that has more than one outdoor unit and operating lines among the indoor/outdoor units
•
(networked wiring), when an instruction to start auto address setting is given from another controller during the auto
address setting process.
2. Error Diagnosis
1 Auto
Address 1-1
5
When one controller in a networked system is running auto address setting, it is not possible
to start auto address setting from another controller.
Wait until the auto address setting in progress finishes.
5-2-1-11