Panasonic U-4LE1R8 Service Manual page 15

3. Auto Address Setting
Automatic Address Setting in Cooling Mode
Case 3B
Indoor and outdoor unit power cannot be turned ON for each system separately.
In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating.
Therefore perform this process only after completing all refrigerant tubing work.
Automatic address setting can be performed during Cooling operation.
Automatic Address Setting from Outdoor Unit
1 Perform steps 1 and 2 in the same way as for
2 Turn the indoor and outdoor unit power ON at all systems.
↓
3 To perform automatic address setting in Cooling mode , on the outdoor unit control PCB in the refrigerant system
where you wish to set the addresses, short-circuit the cooling side of the mode change 3P pin (CN-MODE).
At the same time, short-circuit the automatic address pin (CN-A.ADD) for 1 second or longer, then pull it out.
(Be sure to perform this process for one system at a time. Automatic address settings cannot be performed for more
than one system at the same time.)
↓
(Communication for automatic address setting begins, the compressors turn ON, and automatic address setting
in Cooling mode begins.)
(All indoor units operate.)
↓
* To cancel, again short-circuit the automatic address pin (CN-A.ADD) for 1 second or longer, then pull it out.
The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.
(Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the outdoor unit control
PCB turn OFF.)
↓
4 At the outdoor unit in the next (different) system, short-circuit the automatic address pin (CN-A.ADD) for 1 second or
longer, then pull it out.
↓
(Repeat the same steps to complete automatic address setting for all units.)
↓
5 Operation from the remote controllers is now possible.
* Automatic address setting in Cooling mode cannot be done from the remote controller.
Case 2 .
1-9
Mini VRF SYSTEM
Address Settings
1