H10 Thermal sensor error at heatsink

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An error has been detected with the thermal sensor responsible for monitoring the heatsink temperature. This indicates a fault with the sensor itself or its wiring, compromising the heatsink temperature monitoring. This monitoring is controlled by parameter C0588.

• Broken wire or loose connection to the heatsink thermal sensor (e.g., internal PTC or NTC).
• Internal heatsink temperature sensor failure, reporting an out-of-range value (e.g., open circuit or short circuit).
• Dust accumulation or obstruction around the heatsink, leading to localized overheating and sensor activation.
• Fan failure preventing proper airflow over the heatsink, causing actual high temperature and sensor trip.
• Faulty main control board input for the heatsink temperature sensor.

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1. 1

   Power down the drive, wait for capacitor discharge, then inspect the heatsink for excessive dust buildup and clean if necessary.

2. 2

   Verify the operation of any cooling fans by observing them during startup or checking their auxiliary power supply.

3. 3

   Measure the resistance of the heatsink temperature sensor terminals (if accessible) and compare to expected values for the sensor type (e.g., NTC).

4. 4

   Inspect the internal wiring from the heatsink sensor to the main control board for any breaks or disconnections.

5. 5

   If the fault persists and external factors are ruled out, internal sensor or control board failure is likely, requiring service.