F30003Fault · DriveUsually repairable
SINAMICS S210 F30003: Drive DC Link Undervoltage
What F30003 means
The DC link voltage dropped below the minimum the S210 needs to keep the motor running.
Symptoms
Trips on supply dips, at switch-on, or when the machine draws a lot of power at once.
Is it repairable?
Yes, when the converter's precharge or DC link is the cause.
Common causes
- Supply failure, voltage dip or missing phase
- Blown fuse
- Supply voltage set wrongly in the converter (1 AC vs 3 AC, 200 V vs 400 V)
- Weak precharge circuit or DC link capacitors
Safe checks
- 1Measure all supply phases under load
- 2Check fuses and terminals
- 3Confirm the line voltage setting matches the real supply
Drives hold dangerous voltage after power-off. Checks should only be done by qualified personnel, with power isolated and the DC link discharged.
Reviewed by AutomIQ repair technicians. Code and name from the SINAMICS S210 servo drive system Operating Instructions (09/2019).
Related SINAMICS S210 faults
- F07011Motor overtemperature
- F07412Commutation angle incorrect (motor model)
- F07575Motor encoder not ready
- F07801Motor overcurrent
- F07900Motor blocked/speed controller at its limit
- F07930Brake control error