How do we repair the malfunction of the electrothermal fusion welding machine

First of all, let's look at the first problem of the electric hot melt welding machine. There is no power when connected to the power supply. Why is there no power? That is a problem with the burnt fuse or the power interface. How to solve this problem? We need to replace the accessories or start from scratch. Electrical connection.
The second problem is that the display does not display, the screen is blurred, and the machine buzzes after power is turned on. The display may be damaged. The causes of damage to the display are exposure to the direction, heat, impact, aging, and wire disconnection. When this problem occurs, we need to re- Just wire it up and replace the display.
The third reason why the current of the electric hot melt welding machine cannot rise is because the external power supply is under-voltage and the power cord is laid too long. It is necessary to check the external power connection and re-lay it.
The fourth reason is that the reason why the power is turned on and the set parameters cannot be operated normally is that the first-stage current parameter is set too low. The method is to increase the first-stage current parameter for less than 30 seconds, and then continue welding with normal parameters.
The fifth is that the welding is abnormal because the heating element of the PB pipe fitting is short-circuited. We can stop the welding and wait until it cools down before welding.
The sixth is that the output is open circuit, the resistance exceeds the lower limit, and the PE pipe fittings are abnormal. Check the P8 pipe fittings and replace them for welding.
Seventh, the welding process is abnormal and the connecting posts are hot; the copper caps of the output lines are aging. Repair the copper caps or replace them with new accessories.
Eighth, the cause of overcurrent and overvoltage is the problem of the external power supply. The external power supply needs to be checked and rewired.
The ninth reason is that the motor is working but the hydraulic push is invalid because the hydraulic oil is not in the nominal position. You can check the hydraulic oil and replenish it with the specified hydraulic oil.