CDMALL AC Motor Speed Controller 120V 15A Max Electronic Fan Speed Controller Variable Adjuster for Hydroponics Inline Duct Exhaust Ceiling Fans with 6' Long Cord

1. Ensure Proper Voltage Measurement: When the machine operates without a load, the measured output voltage is only virtual. For an accurate voltage reading, connect a load of at least 35W before adjusting the voltage. 2. Suitable Power and Voltage Range: Please operate the machine within the specified rated power and voltage range. It is intended for use with AC grid power only. 3. Power Limits for Different Loads: The mentioned 4000W power rating refers to the maximum limit when using resistive loads. For inductive loads, such as series motors, the power should be limited to 1/3 of the resistive load power. Exercise caution when using the machine with circuit board electronic products. 4. Normal Heat Generation: It is normal for the machine to generate slight heat during operation. Place and use the machine in a dry and well-ventilated area. 5. Normal sound: It is normal for the motor to produce a slight buzzing sound during operation. 6. Safety Precautions: This product features a flame-retardant plastic shell and must be properly grounded. Ensure that the power outlet is grounded for safe operation. 7. Incompatibility with Soft Start Voltage Regulators: This machine is not designed to work with soft start or slow start voltage regulators. Additionally, it should not be used with ordinary LED lights and household appliances. 8. The fan speed controller is equipped with an independent switch for fuse protection,When the instantaneous current exceeds 15 amperes, the fuse in fuse protection will automatically blow and cut off the power supply, The 120V 15A fuse needs to be replaced before it can be reused.