P3 — Outdoor low ambient temperature protection

What does P3 mean?

The system has shut down because the outdoor temperature is too low for safe operation. This prevents damage during cold conditions.

• Operating the unit below its designed temperature range
• Faulty outdoor temperature sensor
• Incorrect system settings for current weather conditions

Click steps to track your progress.

1. 1

   Ensure the unit is operating within its specified ambient temperature range.

2. 2

   Check the outdoor temperature sensor for accuracy.

3. 3

   Wait for warmer temperatures if the unit is designed to operate only within a certain temperature band.

4. 4

   Consult the manual for specific operating limits.