Difference Between Heat Mode vs Auto Mode
HEAT mode
The unit purely operates in heating mode.
The indoor unit will blow warm air into the room until the set temperature is reached. Once the temperature is reached, the inverter compressor in the outdoor unit will slow down and eventually stop.
The indoor fan will effectively stop when the indoor unit cools down to avoid a draught. When the temperature in the room falls heating will resume.
When summer comes you will need to manually change the mode to COOL or AUTO (recommended).
AUTO mode
(Auto changeover mode)
In this mode, the unit will run on HEAT or COOL depending on the room and set temperatures. Simply set the desired temperature and the inverter compressor will speed up and slow down to maintain temperature. Once the temperature is reached, the outdoor unit will slow down and eventually stop.
The indoor fan will effectively stop when the indoor unit cools down to avoid a draught. When the temperature in the room falls during winter, heating will resume.
If the room temperature is 2ºC above the set temperature in winter, the unit will automatically switch to COOL to maintain temperature.
During summer, the unit running on AUTO mode will automatically switch to cooling to maintain temperature.
For convenience, AUTO mode is recommended. Just set and forget.