Panasonic U-4LE1R8 Service Manual page 76

3. Mini VRF System Alarm Codes
L04 Duplicated Setting of Outdoor System Address Error
1. Error Detection Method
It is judged an error when the identical self-address communication on the indoor and outdoor wirings is received over 5 times
within 3 minutes.
2. Error Diagnosis
1 System
1-1
address
2 Installation
2-1
or setting
related
2-2
3
Are other outdoor units using a duplicate setting?
When units are networked, first set the system address for each outdoor unit in the order
1-2-3 and then run auto address setting.
Run the auto address setting.
3-36
Mini VRF SYSTEM
Trouble Diagnosis
Yes 2-1
No 2-2