•
•
•
•
•
•
•
•
•
-
-
-
•
•
•
•
•
System default operation: Coast stop
Troubleshooting
Check if the value of parameter “Motor selection” is larger than parameter “Maximum number of motor”.
Check that the motor connected to the drive is the motor specified by parameter “Motor selection”.
10.3.33 Fault Code 33 - LVRT Failure
Cause
One of the following occurs during the low voltage ride through:
The duration of power loss is more than 1 s.
The DC-capacitor voltage is below 400 V.
The motor speed is below 5%.
System default operation: Trip
Troubleshooting
Check the parameter “Fault flag of low voltage ride through”.
Modify the related parameters according to parameter “Fault flag of low voltage ride through”.
10.3.34 Fault Code 34 - Bypass Derating Failure
Cause
During bypass derating, another power cell bypass occurs.
System default operation: Coast stop
Troubleshooting
If the quantity of bypassed power cells is not over the limit, reset and start the system.
If the quantity of bypassed power cells is over the limit:
Check the fault of the power cell.
Check the quantity of the bypassed power cells.
Repair or replace the failed power cell.
10.3.35 Fault Code 35 - Input Current Sampling Fault
Cause
Input current is out of the current sampling scope.
System default operation: Trip
Troubleshooting
Check the input current.
10.3.36 Fault Code 36 - Output Current Sampling Fault
Cause
Output current is out of the current sampling scope.
System default operation: Coast stop. System operation is configurable.
Troubleshooting
Check the output current.
10.3.37 Fault Code 37 - Internal Control Power Loss
Cause
The back-up control power provided by the phase-shift transformer auxiliary winding is lost.
System default operation: Alarm
Troubleshooting
Check the wiring and voltage of the back-up control power.
Check that the corresponding switches are closed.
Check that the corresponding relays work normally.
AQ363633621020en-000201 / 172F3117
100 | Danfoss A/S © 2021.06
Fault Tracing
VACON® 1000
Operating Guide
Summary of Contents for VACON 1000
Page 1: ...Operating Guide VACON 1000 drives danfoss com...
Page 2: ......
