Alarm 236 (or 228, 2) Unsuccessful defrosting — System temperature or flow is too low

What does Unsuccessful defrosting 236 mean?

This alarm appears after 10 consecutive failed defrosting attempts, typically due to low system temperature, poor flow, or insufficient available system volume.

• System temperature or flow is too low.
• Insufficient available system volume.
• Significant wind effect on the outdoor unit.
• Poor heat transfer in the system.

Click steps to track your progress.

1. 1

   Check the indoor module/control module for further instructions or specific defrosting settings.

2. 2

   Ensure the air flow to S2125 is not blocked by foreign objects, which can affect defrosting efficiency.

3. 3

   Inspect the outdoor unit for significant ice buildup on the fan, grille, and/or fan cone.

4. 4

   If the problem recurs, activate 'fan de-icing' or 'continuous fan de-icing' in the indoor module/control module settings.