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sara19Aug 2, 2025
What to do if I get a COM BROK error on my Lenze EPM-H520 Touch Panel?
- PperezjonathonAug 2, 2025
If you are seeing a COM BROK error, the serial data cable between the keypad and the PC might be defective or not properly connected. You should check the Sub D plug connection and replace the serial data cable.