Error 442 — Refrigerant charging restriction in heating mode when air temperature is over 15 °C

What does 442 mean?

Refrigerant charging is restricted during heating mode if the outdoor air temperature is above 15°C. This is a specific operational constraint.

• Operating conditions outside defined parameters
• System's control logic preventing charging
• High ambient temperature during heating operation

Click steps to track your progress.

1. 1

   Check the outdoor air temperature when the restriction occurs.

2. 2

   Ensure the system is operating within its specified parameters for heating mode.

3. 3

   If charging is required, consider performing it when temperatures are lower or consulting the manual for specific procedures.

4. 4

   Verify that the ambient temperature sensor is accurate.