Features:
1. Please to check whether the power supply has voltage
2. Whether the terminals are in poor contact and whether the wire ends are connected securely
3. Please to check whether the wires are installed as shown in the pictures and instructions. If the wires are not installed correctly, the voltage regulator will not work
If all the above are correct, please reach out us and we will solve your problem immediately.
PLEASE NOTICE :
1. The input voltage should not exceed the fluctuation range of the converter can withstand.
2. The converter output power must be greater than output nonnection device required power.
3. Positive and negative wires can't be reversed connection.