A common issue with UPS (Uninterruptible Power Supply) units is that they tend to heat up easily. If a UPS feels hot to the touch or triggers an overheating alarm, do not ignore it. If left unaddressed, minor consequences include automatic shutdown and subsequent equipment power failure; in more severe cases, it may even damage the internal batteries and components.
If you encounter this situation, stay calm and follow these step-by-step checks and solutions:
1. First, check if the surrounding environment is too hot
Measure the temperature of the room where the UPS is located. Is the ventilation poor? Generally speaking, UPS units perform best in a cool environment, and the temperature should ideally not exceed 40°C.
2. Clean the dust immediately!
Dust is the biggest enemy of heat dissipation. After prolonged use, dust will accumulate inside the UPS—especially on the fan and ventilation ducts. Blockages from dust can easily lead to overheating.
3. Is the UPS overloaded?
Check the "load" percentage on the UPS display or its management software. If the load exceeds 80%, you need to consider reducing the burden on the UPS.
4. Check if the fan is functioning properly
The fan is the main component responsible for the UPS’s heat dissipation. If the fan makes unusually loud noise, operates intermittently, or produces no sound at all, it is highly likely that the fan is faulty.