Danfoss VLT FC 103 Operating page 132

VLT® Refrigeration Drive FC 103
Operating Guide
9.3.48 ALARM 51, AMA Check Unom and Inom
Cause
The settings for motor voltage, motor current, and motor power are wrong.
Troubleshooting
• Check settings in parameters 1-20 to 1-25.
9.3.49 ALARM 52, AMA Low Inom
Cause
The motor current is too low.
Troubleshooting
•
Check the settings in parameter 1-24 Motor Current.
9.3.50 ALARM 53, AMA Motor Too Big
Cause
The motor is too big for the AMA to operate.
9.3.51 ALARM 54, AMA Motor Too Small
Cause
The motor is too small for the AMA to operate.
9.3.52 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.
9.3.53 ALARM 56, AMA Interrupted by User
Cause
The AMA is manually interrupted.
9.3.54 ALARM 57, AMA Internal Fault
Cause
Try to restart the AMA. Repeated restarts can overheat the motor.
9.3.55 ALARM 58, AMA Internal Fault
Troubleshooting
Contact the Danfoss supplier.
9.3.56 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.
9.3.57 ALARM 60, External Interlock
Cause
A digital input signal indicates a fault condition external to the drive. Within the control compartment, the following 3 relay contacts
are connected in series to 1 digit input that is used as a thermal overload relay:
• KFJ.1 monitors the heat within the input power options cabinet.
• KFJ.2 monitors the heat within the output filter cabinet.
• KFJ.3 monitors the heat within the input filter cabinet.
When the thermal switches in any of these cabinets open due to overtemperature, the drive trips on External Interlock [A60].
132 | Danfoss A/S © 2020.09
Maintenance, Diagnostics, and
Troubleshooting
AQ357954340588en-000201 / 130R0881