57
AMA internal fault (Persistent)
Danfoss · VLT HVAC Drive High Power
What does 57 mean?
An internal fault occurred during the Automatic Motor Adaptation (AMA) process. While a single occurrence might be transient, repeated occurrences suggest a more persistent issue within the drive's control logic or its interaction with the motor, potentially heating the motor due to repeated attempts.
Complete Troubleshooting Guide
- 1
Attempt to restart the AMA process.
- 2
If the fault persists after multiple attempts, ensure all motor data (parameters 1-20 to 1-25) is accurate and motor connections are secure.
- 3
Consider the possibility of motor or drive hardware issues if the fault recurs consistently.