LG ATNH126ELFC Service Manual page 142

Outdoor Units
1.5 Reversing Valve Control
1. The first situation of reversing valve maintains off(cooling) (Before that The power turns on the set of
outdoor_unit and indoor_unit )
2. While the Cooling and Defrosting Process the Reversing valve control is OFF and during the Heating
Process the Reversing valve control is ON
3. When the defrosting is started, unit follows the defrost algorithm.
4. In case the mode is changed from heating to cooling ,the outdoor unit resets (OFF
The Reversing valve is changed after that the comp of outdoor_unit will be Off for 30 seconds.
5. If the indoor units switched OFF by the REMOCON in the heating mode, The Reversing valve will be
stopped after that the comp of outdoor unit will be OFF for 30 seconds.
6. In case of the comp is stopped according to the Thermo off signal in the heating mode, the outdoor
units maintain the heating mode.
142 Synchro Air Conditioner
3 minutes ON),