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Jamie CordovaAug 8, 2025
How to fix Mitsubishi Electric MELSEC iQ-R RX41C4-TS RUN LED not on?
- EErik MccannAug 8, 2025
If the RUN LED is not on for your Mitsubishi Electric I/O Systems, first ensure the supply voltage to the power supply module is within the rated range. Next, calculate the current consumption of all mounted modules, including the CPU, I/O, and intelligent function modules, to confirm that the power capacity is sufficient. Also, check the module's mounting state. If the RUN LED remains off, reset the CPU module. If it still doesn't turn on, the module might be faulty.