1. For "Tiny Cooling Fan" access to live parts protection is still a problem that Π category appliances protection of basic insulation is insufficient, the test can be touched by means of basic insulation protection motor housing. In recent years, due to rising raw material prices, many companies implement the previous class Ⅰ changed Π class equipment, but did not pay attention to timely improvements shock protection measures for the product, creating a safety hazard.
2. The non-work is currently the main problem is the "Tiny Cooling Fan" to run the motor when the capacitor short circuit and locked rotor, the motor winding temperature exceeds the standard limit, after the test the electric strength test breakdown may occur fire or contact with live parts.
3. "Tiny Cooling Fan" power connection and external flexible cord is the main problem after the power cord is subjected to tensile testing, power line displacement at the clamping device is too large, and the power cord does not meet the standard specifications. Some manufacturers, for cost considerations, the use of light PVC sheathed flexible cord on weighing more than 3kg of fans, do not meet the standards.