Fault analysis and treatment method of DC screen high frequency switching power supply module 1、 Protection of high frequency power module

1. Over voltage, under voltage and over temperature of AC input of high frequency power supply module will lead to charging module protection, please confirm according to the fault code;

2. The cabinet is equipped with glass door or the cabinet is airtight, which may lead to overheating protection of high frequency module;

3. Too high ambient temperature in the computer room will also lead to overheating of the high frequency module

2、 High frequency module failure

1. High output voltage or IGBT over-current of high-frequency module will cause module failure, so it is required to turn the module off and on again to restore the normal operation of the module;

2. Unreasonable voltage adjustment may lead to over-voltage of module output. In this case, it is necessary to adjust the voltage adjustment potentiometer counterclockwise to the minimum after power failure (when the potentiometer is adjusted to the minimum, a slight click sound can be heard), and then reset the output voltage of the module.
3、 Uneven current of high frequency module

1. There is no connection of current sharing line, which may lead to uneven current;

1 2. The current can not be shared between the control module and the closing module;

3. Disconnect the current sharing line and communication line, load the module, and measure the signal on the current sharing port of the module. The signal size should meet the requirements of I / I * 2V, where I is the actual output current of the charging module and I is the rated output current of the module;

4、 High frequency module communication interruption