Cause The drive input power voltage is changing too much.
Remedy Examine the input power for problems.
Make the drive input power stable.
Fault SC - Short circuit/IGBT failure
Cause Overheating caused damage to the motor or the motor insulation is not
satisfactory
.
Remedy Measure the motor insulation resistance and replace the motor if there is
electrical conduction or unserviceable insulation.
Cause The motor main circuit cable is contacting ground to make a short circuit.
Remedy Examine the motor main circuit cable for damage and repair short circuits.
Measure the resistance between the motor main circuit cable and the ground
terminal. If there is electrical conduction, replace the cable.
Fault Uv1 - DC Bus undervoltage
Cause There is a phase loss in the drive input power.
Remedy Correct errors with the wiring for main circuit drive input power.
Cause There is loose wiring in the drive input power terminals.
Remedy Tighten the terminal screws to the correct tightening torque.
Cause The drive input power voltage is changing too much.
Remedy Examine the input power for problems. Make the drive input power stable.
If the input power supply is good, examine the magnetic contactor on the main
circuit side for problems.
Cause There is a loss of power.
Remedy Use a better power supply.
Fault Uv2 - Control power undervoltage
Cause There was a problem with the drive hardware.
Remedy Re-energise the drive.
Contact us.
Fault Uv3 - Soft charge answerback fault
Cause The relay or contactor on the soft-charge bypass relay is damaged.
Remedy Re-energise the drive.
Contact us.
Fault finding
07/2021 - ©Atlas CopcoPage 1261950840208_A
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