Zeror.ai Error Codes Siemens F07807

Siemens F07807

Brand: SiemensModel: PLC (S7-1200 / S7-1500)Error code: F07807

What the Fault Means

DC link undervoltage

Likely causes

  • Supply voltage too low; phase loss; main contactor opens during operation

Solution and Safe First Checks

  1. Check supply voltage (rated 3×230 V or 3×400 V); check contactor; check input fuses

Safety: do not work inside the panel without isolating the power; if unsure, consult a qualified technician.

Related Siemens error codes

Source: the Zeror.ai industrial fault database and Siemens technical documentation. This page is for information; on critical systems follow the manufacturer's manual and authorised service.

Siemens F07807 · Zeror.ai