Danfoss VLT HVAC Drive FC 102 Operating Manual page 145

Operating Guide | VLT® HVAC Drive FC 102
9.3.54 ALARM 56, AMA Interrupted by User
Cause
The AMA is manually interrupted.
9.3.55 ALARM 57, AMA Internal Fault
Cause
Try to restart the AMA. Repeated restarts can overheat the motor.
9.3.56 ALARM 58, AMA Internal Fault
Troubleshooting
Contact the Danfoss supplier.
9.3.57 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.
9.3.58 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].
Troubleshooting
• Open the control compartment and check for any lights in relays KFJ.1, KFJ.2, and KFJ.3. If no lights are present, check for other
external interlocks.
• Clear the external fault condition.
• To resume normal operation, apply 24 V DC to the terminal programmed for external interlock.
• Reset the drive.
Danfoss A/S © 2018.10
Maintenance, Diagnostics, and
Troubleshooting
AQ262141314214en-000101 / 130R0880 | 145