Panasonic U-4LE1E5 Service Manual page 97

3. Mini VRF System Alarm Codes
E08 Duplicate Indoor Unit Address Settings Error
1. Error Detection Method
It is judged an error if the addresses of indoor units are duplicated.
• The indoor unit address settings are duplicated in the remote control detailed settings mode.
•
The multiple unit DISP pin is shorted across the indoor unit whose address is Not Set.
2. Error Diagnosis
1 Indoor
1-1 Is the DISP pin on the indoor unit control PC board shorted?
unit
control
Conduct checks prior to auto address setting.
PC board
1-2
Does E08 fail to go off even after running auto address setting again?
The nonvolatile memory (EEPROM) on the indoor unit board has failed.
1-3
Replace the EEPROM.
Do not make changes to indoor unit addresses with the detailed settings of the remote
controller.
1-4
Make them in the remote control address change mode.
•
The '/' in the table indicates the DC motor's indoor unit board/AC motor's indoor unit board.
•
For information on the procedures for replacing the nonvolatile memory (EEPROM) of the indoor unit, refer to the manual
that is packaged with the indoor unit service board.
DC Motor Model Indoor Unit Control PC Board
DISP Pin EEPROM
5 - 17
EEPROM
AC Motor Model Indoor Unit Control PC Board
Mini VRF SYSTEM
Trouble Diagnosis
Yes Remove the short
No 1-2
Yes 1-3
No 1-4
DISP Pin
5