The internal cooling fan will only run when it is required. CyberPower UPS systems utilize an internal thermometer which activates the fan when the temperature exceeds a certain threshold. When the UPS is running idle (not using battery power), it is completely normal for the fan to not be running. The exception is with Online units, models that begin with “OL”. Their cooling fans will run ALL the time.
Should the cooling fan on my CyberPower UPS be running at all times?
FAQ Category: UPS
