Power unit: Rectifier overtemperature

What does F30037 mean?

The rectifier component within the power unit has overheated beyond its permissible temperature limit. Potential causes include insufficient cooling (fan failure), excessive motor load, high ambient temperatures, or a failure in one of the line supply phases. Prolonged overtemperature can lead to rectifier failure and drive malfunction.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Inspect the motor load to ensure it is not exceeding design limits.

2. 4

   Check all line supply phases for proper voltage and connection to ensure no phase failure.