Error 191 — No temperature changes in EVA OUT during pipe inspection or incorrect temperature

What does 191 mean?

The EVA OUT sensor does not show a temperature change during pipe inspection, or it reports an incorrect temperature. This might also be due to a wrong unit address.

• EVA OUT sensor is faulty
• Unit address is incorrectly set
• Refrigerant flow issues
• Pipe inspection procedure error

Click steps to track your progress.

1. 1

   Confirm the EVA OUT sensor is working correctly and properly attached.

2. 2

   Double-check the unit's address configuration.

3. 3

   Ensure the refrigerant circuit is functioning normally.

4. 4

   Review the pipe inspection guidelines.