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

What does 442 mean?

The system has restricted refrigerant charging while in heating mode because the ambient air temperature is above 15 °C. This is a safety and efficiency measure during the charging process.

• Attempting to charge refrigerant in heating mode above the allowed outdoor temperature
• Faulty temperature sensor providing incorrect ambient readings
• Incorrect operation procedure during maintenance

Click steps to track your progress.

1. 1

   Ensure that refrigerant charging procedures are only performed within the specified temperature ranges as per the manufacturer's guidelines.

2. 2

   If refrigerant charging is being attempted, verify the outdoor ambient temperature is below 15 °C.

3. 3

   Check the outdoor temperature sensor if you believe the ambient temperature reading is inaccurate.

4. 4

   This error is primarily for technicians performing maintenance; ensure they are following correct protocols.

5. 5

   If the error occurs during normal operation, contact a qualified technician.