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VACON® 1000
Operating Guide
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.
100 | Danfoss A/S © 2021.06
Fault Tracing
AQ363633621020en-000201 / 172F3117
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