In addition to maintain your energy consumption there is tips given below that can reduce your energy consumption 5 to 50 %.
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Size of your air conditioning is the main concern to reduce your energy Consumption. Your Air conditioner should have appropriate size as per your room's need.
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A dusty filter decreases air flow. Check your unit's air filters once a month and clean or replace filters when essential. Keeping your filters fresh can cut energy consumption 5 to 15%.
Holes in the seal between the air conditioner and the window frame permit cool air to flee from your home. Moisture can damage this seal so look over it annually to see that it makes contact with the unit's metal case.
Coils can turn into clogged with dust. To clean room air conditioner coils, first unplug the unit. Use a vacuum cleaner to remove dust from the interior heat exchanger; the external heat exchanger may be cleaned using water from a garden hose.
Fans can also help cool your home. While fans cannot replace air conditioners, they can provide supplemental cooling, especially on mild summer days. Substituting fans for air conditioners can save 60% or more in energy.