Question:

What does the "tE4" or "tC4" error code mean on my PCB and how can I resolve it?

Answer:

The "tE4" or "tC4" error code indicates a PCB Temperature Error. This means that either the temperature of the Intelligent Power Modules (IPM) on the PCB main is abnormal, or the thermistor of the PCB main is defective. To resolve this issue, follow these steps:

• Check IPM temperatures: Use a thermal camera or infrared thermometer to check the temperatures of the IPMs on the PCB main. Ensure they are within their normal operating range.
• Test thermistor: Connect a multimeter to the thermistor and measure its resistance. If the resistance is outside the expected range, the thermistor may be faulty and requires replacement.
• Clean contacts: Inspect and clean any dirty or corroded contacts between the IPMs and the PCB main. This can sometimes cause false temperature readings.
• Replace components: If necessary, replace any faulty IPMs or thermistors found during the troubleshooting process.
• Reassemble and test: After making all necessary repairs, reassemble the device and test for proper functioning.