EC55 — Outdoor IPM module temperature sensor malfunction

What does EC55 mean?

The temperature sensor monitoring the outdoor unit's Intelligent Power Module (IPM) is malfunctioning. The IPM is critical for power conversion.

• Faulty IPM temperature sensor
• Poor connection to the sensor
• Overheating condition affecting the sensor

Click steps to track your progress.

1. 1

   Ensure the outdoor unit has proper ventilation to prevent overheating.

2. 2

   Check the electrical connections of the IPM temperature sensor.

3. 3

   If the sensor is faulty or the IPM is overheating, professional diagnosis and repair are needed.