Alarm 41 — Return air temperature too low for cooling

What does 41 mean?

This alarm is displayed when the return air temperature falls below the limit set for cooling mode. The alarm code is shown but not stored in memory for recall. Parameter 114 (COOL RET AIR LIMIT) defines this limit.

• Return air temperature is excessively low during a cooling demand.
• Incorrect setting for Parameter 114 (COOL RET AIR LIMIT).
• Problem with the return air temperature sensor.
• Unit is attempting to cool in an environment that is already too cold.

Click steps to track your progress.

1. 1

   Check the current return air temperature.

2. 2

   Verify the setting of Parameter 114 (COOL RET AIR LIMIT).

3. 3

   Ensure the return air temperature sensor is accurate.

4. 4

   Investigate why the return air temperature is too low for cooling.