I can offer some general insights into why a split air conditioner might behave in the manner you described.
If your split air conditioner appears to start by itself at night and stop automatically during the daytime, there are several possible explanations:
Scheduled Timer: Many modern air conditioners come with a built-in timer function that allows users to set specific times for the AC to turn on or off automatically. If you or someone with access to the air conditioner set up a timer, it could be the reason for the automatic activation and deactivation.
Smart Features: Some air conditioners have smart features that enable them to learn your habits and adjust their settings accordingly. They may use sensors to detect occupancy or monitor room temperature patterns, automatically turning on or off to maintain a comfortable environment.
Inverter Technology: Inverter-type air conditioners adjust their cooling capacity based on the room's needs. During the night, when the outdoor temperature is lower, the AC may require less power to cool the room, leading it to turn on less frequently. During the hotter daytime hours, the AC might need to run more often to maintain the desired temperature.
Power Interruptions: If your area experiences power interruptions or fluctuations during the day, it might cause the AC to turn off and then restart once the power stabilizes.
Remote Control Interference: Sometimes, other electronic devices or remote controls may inadvertently trigger the AC. For example, if you have a universal remote that shares a similar frequency with the AC's remote, it could accidentally send signals to the air conditioner.
Faulty Wiring or Control Board: In some cases, electrical issues or a malfunctioning control board could cause the air conditioner to turn on or off unexpectedly.
To troubleshoot the issue and determine the exact cause of the automatic operation, you can try the following steps:
- Check if there is any timer function enabled on the remote control or air conditioner settings and adjust it as needed.
- Verify if there are any smart features or occupancy sensors that may be causing the automatic operation.
- Make sure there are no power interruptions or fluctuations during the day that might affect the AC's behavior.
- Check for any issues with the air conditioner's control board or wiring that could be causing the problem.
If you're unable to identify the cause or if the behavior seems abnormal, it's best to contact the manufacturer's customer support or seek assistance from a qualified HVAC technician to inspect and diagnose the air conditioner for any potential faults or malfunctions.