Display 440 — Heating Blocked (Outdoor Temp > 35°C)

What does 440 mean?

Heating operation is blocked because the outdoor temperature is too high (above 35°C).

• High ambient temperature exceeding heating limits
• Thermostat setting conflict

Click steps to track your progress.

1. 1

   Wait for the outdoor temperature to decrease to a suitable level for heating operation.

2. 2

   Ensure the thermostat settings are appropriate for the current conditions.

3. 3

   Check if any ventilation issues are causing the outdoor unit to sense artificially high temperatures.