When "Cross Flow Fan" centrifugal cooling products up to speed, cooling fan should be measured input current is normal, centrifugal cooling fan operating current can not exceed the rated current. If the operating current exceeds the rated current, should check the supply voltage is normal. Centrifugal cooling products for the motor power refers to certain conditions, the centrifugal fan and wind chassis, the required high power inlet fully open. If the air inlet fully open operation performed, the risk of damage to the motor. When the cooling fan is best to test the cooling fan inlet or outlet valve on the pipeline closed, the operation will gradually open the valve, until the desired working conditions, and pay attention to the cooling fan operating current exceeds the rated current.