Sanyo MINI ECO-i XHX1252 Service Manual & Test Run Service Manual page 13

3. Auto Address Setting
Case 2 Automatic Address Setting in Heating Mode
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 from Outdoor Unit
1. Perform steps 1 and 2 in the same way as for Case 1 .
2. Turn the indoor and outdoor unit power ON at all systems.
↓
3. To perform automatic address setting in Heating mode , on the outdoor unit control PCB in the refrigerant
system where you wish to set the addresses, short-circuit the automatic address pin (CN51) 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 heating mode begins.)
(All indoor units operate.)
↓ * To cancel, again short-circuit the automatic address pin (CN51) 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 LED 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 (CN51) 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.
* To perform automatic address setting from the remote controller, perform steps 1 and 2, then use the remote controller to
complete automatic address setting.
Refer to "Automatic Address Setting from the Remote Controller".
1-9
Test Run
1