Danfoss VACON 1000 - Page 98

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System default operation: Coast stop during SVC, not detected during SLVC. System operation is configurable.
Troubleshooting
Check if the encoder is operating normally.
10.3.22 Fault Code 22 - Input Overcurrent (Hardware Fault)
Cause
The input current is larger than 210% of the input current sample rating.
System default operation: Trip
Troubleshooting
Check the input current.
10.3.23 Fault Code 23 - Output Overcurrent (Hardware Fault)
Cause
The output current is larger than 210% of the output current sample rating.
System default operation: Trip
Troubleshooting
Check the output current.
10.3.24 Fault Code 24 - Current Sensor Power Fault
Cause
The LEM power board is not energized.
System default operation: Trip. System operation is configurable.
Troubleshooting
Check the supply of the LEM power board.
10.3.25 Fault Code 25 - Bypassed Cell Quantity Over Limit
Cause
The quantity of bypassed power cells in one phase is above the setting value.
System default operation: Coast stop
Troubleshooting
Check the power cells for faults.
Check the quantity of bypassed power cells.
Repair or replace the failed power cell.
10.3.26 Fault Code 26 - System Running with MCB Open
Cause
During operation, the MCB status digital input in the main controller I/O board is open.
System default operation: Coast stop
Troubleshooting
Check the status of the MCB.
10.3.27 Fault Code 27 - Synchronous Switch Status Error
Cause
KM2 and KM4 are closed at the same time before synchronous transfer start.
System default operation: Trip
Troubleshooting
Check the status of switches.
10.3.28 Fault Code 28 - Auto Tuning Failure
Cause
During auto tuning, a fault occurs or a stop command is received.
AQ363633621020en-000201 / 172F311798 | Danfoss A/S © 2021.06
Fault Tracing
VACON® 1000
Operating Guide