Heatsink overtemp. fault power supply unit

What does F318 mean?

The DIAX04 SSE-03VRS power supply unit's internal heatsink temperature has exceeded its maximum safe operating limit, resulting in a shutdown. This protects the power components from thermal damage. It typically signifies insufficient cooling or sustained overloading of the power supply unit.

• Ambient temperature in the control cabinet is too high for the DIAX04 SSE-03VRS power supply unit.
• Cooling fan on the power supply unit is blocked, dirty, or faulty.
• Heat sink fins of the power supply unit are clogged with dust or debris, impairing heat dissipation.
• The DIAX04 SSE-03VRS power supply unit is overloaded, drawing continuous current beyond its rating.
• Insufficient ventilation or mounting clearances for the power supply unit in the control cabinet.

Click steps to track your progress.

1. 1

   Allow the DIAX04 SSE-03VRS power supply unit to cool down completely before attempting a reset.

2. 2

   Inspect the cooling fan on the power supply unit for proper operation, obstructions, and cleanliness.

3. 3

   Clean any dust or debris from the heat sink fins of the DIAX04 SSE-03VRS power supply unit.

4. 4

   Verify the ambient temperature in the control cabinet is within the specified operating range.

5. 5

   Check the load on the power supply unit and ensure it is not continuously exceeding its rated capacity. Reduce load or consider a larger power supply.