Samsung AVXC1H022 series Service Manual page 333

Reference Information
3. In case more than 2 units of outdoor unit are installed
1) Lock the valves on the gas side of the Sub Unit.
2) Press the K2 button of the outdoor PCB 3 times. At this time, K7A is
displayed on the PCB LED.
If the compressor on the Main Unit is operated after pressing the button,
•
wait approximately 20~30 minutes.
3) Lock the valves on the liquid side of the Sub Unit.
4) Lock the valves on the liquid side of the Main Unit and observe the low pressure same as the single outdoor unit case.
5) If the low pressure is lowered, lock the valves on the gas side of the Main Unit and end the pumpdown operation mode.
10-11
Display
3 times :
Samsung Electronics