What does AF mean?

The ambient temperature is too high, or the cooling fan has failed. The system is overheating.

• Ambient temperature too high
• Cooling fan failure (if equipped)

Click steps to track your progress.

1. 1

   Check that the cooling fan is operating correctly.

2. 2

   Ensure the ambient temperature around the unit is within the operating range.

3. 3

   If the fan is not working, check its connections and power supply.

4. 4

   If the fan is functional, consider if the ambient temperature is persistently too high for the unit's rating.