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VLT® HVAC Drive FC 131
Programming Guide
5.5.25 ALARM 55, AMA Parameter Out of Range
Cause
The AMA cannot run because the paramenter values of the motor are out of the acceptable range.
Troubleshooting
•
Check the settings in parameter group 1-2* Motor Data.
5.5.26 ALARM 56, AMA Interrupted by User
Cause
The AMA is manually interrupted.
Troubleshooting
•
Re-run the AMA calibration.
5.5.27 ALARM 57, AMA Internal Fault
Cause
Internal fault.
Troubleshooting
Try to restart the AMA. Repeated restarts can overheat the motor.
5.5.28 ALARM 58, AMA Internal Fault
Cause
Internal fault.
Troubleshooting
Contact the Danfoss supplier.
5.5.29 WARNING 59, Current Limit
Cause
The current is higher than the value in parameter 4-18 Current Limit.
Troubleshooting
•
Ensure that the motor data in parameters 1-20 to 1-25 is set correctly.
•
Increase the current limit if necessary. Ensure that the system can operate safely at a higher limit.
5.5.30 ALARM 60, External Interlock
Cause
External interlock has been activated.
Troubleshooting
•
To resume normal operation, apply 24 V DC to the terminal programmed for external interlock and reset the drive (via serial
communication, digital I/O, or by pressing [Reset]).
5.5.31 WARNING 66, Heat Sink Temperature Low
Cause
This warning is based on the temperature sensor in the IGBT module.
The heat sink temperature measured as 0 °C (32 °F) could indicate that the temperature sensor is defective, thus causing the fan
speed to increase to the maximum. If the sensor wire between the IGBT and the gate drive card is disconnected, this warning is
produced.
Troubleshooting
•
Check the IGBT thermal sensor.
186 | Danfoss A/S © 2022.05
Troubleshooting
AU370727746889en-000101 / 130R0994
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