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How to troubleshooting and repairing servo drive fault code "11" (power module overcurrent). The core content can be summarized in the following steps:

Initial Troubleshooting: After confirming there is no mechanical obstruction, disconnect the power and wait for the capacitors to discharge (indicator lights will turn off). Reconnect the power and test. If the fault persists, proceed to the next step.

Code Localization: Consult the manual to determine that fault code "11" indicates power module overcurrent. Based on the suggested possible causes (e.g., module damage, output short circuit, etc.), determine the direction of troubleshooting.

Hardware Testing: After completely disconnecting the power, disconnect the wiring and measure the rectifier section and the output U/V/W phases. A short circuit in the W phase was found, indicating a damaged driver module. Simultaneously test the servo motor and confirm it is functioning normally.

Temporary Solution: To avoid disrupting production, replace the driver with a spare. After the equipment completes a reset and returns to normal operation, it resumes normal operation.

Fault Repair: The faulty driver was disassembled, and the module was confirmed to be short-circuited (the peripheral driver section was normal). A module of the same model was replaced, thermal grease was applied, conformal coating was sprayed, and the module was reassembled and tested. Operation and fan function were normal. Module temperature (<60℃) and bus voltage were within the normal range. Repair complete.

the same fault code may correspond to different fault points, requiring specific analysis of specific problems," and demonstrates the complete process from code location to hardware repair through hands-on demonstration.

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