XFMR_TEMP_W - Transformer temperature was high, now returning to normal

What does XFMR_TEMP_W mean?

This message indicates that the transformer temperature was previously high but has now returned to a safe level, allowing the Sunny Boy to resume operation. This is a warning message.

• Previous high ambient temperature
• Temporary ventilation blockage that has resolved
• Temporary fan issue that has resolved.

Click steps to track your progress.

1. 1

   Check the function of the fans to ensure they are operating correctly and efficiently.

2. 2

   Ensure the Sunny Boy has adequate ventilation and its fan intakes are not blocked.

3. 3

   Monitor the inverter for recurrence of high temperature warnings to prevent future shutdowns.