When you set a timer on your AC, it is programmed to turn off or on at a specific time you have chosen. However, if there is a power outage or interruption in the electricity supply, the AC's timer settings might get reset or disrupted.
Here's what likely happened in your case:
Power outage: When the power goes off, the AC loses its power supply and turns off. During this time, the timer settings are not being actively maintained.
Power restoration: When the power comes back on after the outage, the AC unit receives electricity again. In some AC models, after a power interruption, the timer settings might reset to default or get cleared. As a result, the AC would turn off because it doesn't "remember" the timer setting you previously configured.
To avoid this issue, check if your AC has any power-saving or memory functions that can retain timer settings even after a power outage. Some modern AC units come with memory features that can keep the timer settings intact even in case of a power interruption. If your AC doesn't have this capability, you might need to manually reset the timer after a power outage.
Alternatively, you can consider using a UPS (Uninterruptible Power Supply) or a backup power source for your AC to ensure that it doesn't lose its settings during short power outages. UPS devices provide temporary power during power interruptions, allowing your AC to maintain its settings and continue running as intended once the main power is restored.