MYJG power supply external LCD screen

CO2 Laser Cutting & Engraving Laser Power Supply
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After MYJG100W and 150W are connected to the power supply, the switch rotates to the right, and there is a trimmer potentiometer on the LCD screen to adjust the current. If you turn it to the left, the LCD screen displays normally, and the potentiometer does not work.

Note: The external LCD screen of MYJG60W and 80W power supply can only display current information, and cannot adjust the current.

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hi, my power supply has no power, what is the correct connection with external lcd? I moved the switch to the right and connected only the external display. by pressing the test key the mA always remain at zero.

3

hi, I’ve already tried and it doesn’t work, does it necessarily need other connections to test it?