OAU LOW CFM — Not enough outside air is being drawn in

What does OAU LOW CFM mean?

This alarm means the ERV is not achieving the desired amount of outside air. The actual outside air CFM is less than 10% of the commanded amount.

• Outside air CFM setpoint is too high
• Air filter or screen is dirty or plugged
• Pressure tubing is incorrect or disconnected
• Wrong outside air CFM curve programmed
• Indoor fan speed is too low

Click steps to track your progress.

1. 1

   Check and clean or replace the air filter and any screens.

2. 2

   Verify the outside air CFM setpoint is appropriate.

3. 3

   Inspect pressure tubing for correct connection and condition.

4. 4

   Ensure the indoor fan speed is set correctly.

5. 5

   Reset the alarm if the condition is resolved.