The power unit has detected line asymmetry on the DC link voltage, possibly from phase failure or incorrect wiring in the motor or line connections. The manual's first action is: “- check the line phase connection. - check the motor feeder cable connections. If there is no phase failure of the line or motor, then line asymmetry is involved. - reduce the power in order to avoid fault F30011.”
- Model
- Siemens G120C
- Display shows
- Power unit: Line asymmetry (A30057)
- Type
- Fault code
- Source
- Manual p. 740
What A30057 means
Power unit: Line asymmetry p. 740
Common causes
- Frequencies have been detected on the DC link voltage that would suggest line asymmetry or failure of a line phase. It is also possible that a motor phase has failed. p. 740
What to do
- - check the line phase connection. - check the motor feeder cable connections. If there is no phase failure of the line or motor, then line asymmetry is involved. - reduce the power in order to avoid fault F30011. p. 740
Before you service the product, read the safety instructions in the manual p. 4.
If A30057 is still not resolved
This page summarises what the manufacturer’s manual says about A30057; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Siemens. Found a mistake? Report an error.