Alarm 139 — Outdoor Airflow Too High

What does Alarm 139 mean?

This alarm is triggered when the actual outdoor air intake is greater than the target outdoor air percentage (set by Parameter 240) for a specified duration (set by Parameter 244).

• Outdoor air damper is opening too much.
• High outdoor air pressure.
• Malfunctioning outdoor air sensor.
• Incorrect settings for Parameter 240 or 244.

Click steps to track your progress.

1. 1

   Inspect the outdoor air damper for correct operation and position.

2. 2

   Check for any obstructions or unusual conditions affecting outdoor air intake.

3. 3

   Verify the outdoor air sensor readings.

4. 4

   Review the settings for Parameter 240 (Advanced Air Flow High Outdoor CFM Alarm Set Point) and Parameter 244 (duration).

5. 5

   Ensure the system is correctly configured for outdoor air intake.