Siemens G120C Error A30502: Power unit: DC link overvoltage

Siemens G120C drive · taken from the manufacturer’s manual, pages cited

Fault codeA30502

The power unit has detected overvoltage on the DC link during a pulse inhibit, possibly due to excessive supply voltage or an incorrectly dimensioned line reactor. The manual's first action is: “- check the device supply voltage (p0210).”

Model
Siemens G120C
Display shows
Power unit: DC link overvoltage (A30502)
Type
Fault code
Source
Manual p. 743

What A30502 means

Power unit: DC link overvoltage p. 743

Common causes

  • The power unit has detected overvoltage in the DC link on a pulse inhibit. p. 743
  • - device connection voltage too high. p. 743
  • - line reactor incorrectly dimensioned. p. 743
  • Alarm value (r0949, interpret decimal): DC link voltage [1 bit = 100 mV]. p. 743
  • See also: p0210 (Drive unit line supply voltage) p. 743

What to do

  1. - check the device supply voltage (p0210). p. 743
  2. - check the dimensioning of the line reactor. p. 743
  3. See also: r0070 (Actual DC link voltage). p. 743

Before you service the product, read the safety instructions in the manual p. 4.

If A30502 is still not resolved

  • contact service / dealer p. 4
    “Warning concept This Manual contains information which you must observe to ensure your own personal safety as well as to avoid material damage.”
  • contact service / dealer p. 12
    “WARNING Danger to life if the safety instructions and residual risks are not observed”
Open the manual at page 743 All G120C error codes Manual details & download

This page summarises what the manufacturer’s manual says about A30502; 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.