Siemens VFD fault codes

常见原因

• Motor cable short circuit or earth fault
• Motor power doesn't match the drive
• Damaged power stage

检查内容

• Disconnect the motor cable and run the drive without load: if the fault stays, the drive itself is faulty
• Megger the motor and cable for insulation or phase-to-phase faults
• Increase acceleration/deceleration time; check for mechanical jams

常见原因

• Deceleration too fast
• High supply voltage
• Regenerative load

检查内容

• Increase the deceleration time or enable the stall/overvoltage prevention function
• Check the braking resistor and braking transistor (if fitted)
• Measure the supply voltage – it should be within the drive's rating

常见原因

• Supply failure or dip
• Missing phase

检查内容

• Measure all three input phases under load
• Check input fuses, contactor and loose terminals
• If the supply is fine, check the DC bus capacitors and pre-charge circuit

常见原因

• Fan failure
• High ambient temperature
• Blocked air flow

检查内容

• Clean the heatsink and check that the cooling fan runs
• Check the panel temperature and ventilation
• Reduce the load or carrier frequency

常见原因

• Drive overloaded
• Duty cycle too high

检查内容

• Reduce load or duty cycle

常见原因

• Motor overloaded
• Wrong motor data

检查内容

• Check motor data parameters and the load

常见原因

• One input phase missing

检查内容

• Measure all three input phases under load
• Check input fuses, contactor and loose terminals
• If the supply is fine, check the DC bus capacitors and pre-charge circuit

常见原因

• Motor or cable insulation failure

检查内容

• Megger the motor and cable to earth
• Check for water or dust in the motor terminal box
• If insulation is fine, the output IGBT or current sensor may be faulty

常见原因

• IGBT or gate driver failure
• Short circuit on the output

检查内容

• Disconnect the motor; if the fault remains, the power board needs repair