EL
ErrorLib
Brands
||
  1. Home
  2. Bosch Rexroth
  3. IndraDrive C Drive Controllers
  4. F8203
About·Privacy·Terms

ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

F8203

Fatal Error (Safety Technology Initialization)

Bosch Rexroth · IndraDrive C Drive Controllers

What does F8203 mean?

This is a fatal error specifically tied to the drive's safety technology during initialization. When F8203 occurs, the closed-loop or open-loop U/f control of the drive is no longer guaranteed. The drive immediately switches off, becoming torque-free, overriding settings in P-0-0119 and P-0-0117. This error requires a complete recommissioning of the safety technology.

Common Causes

  • An error condition detected within the drive's safety technology system during initialization.
  • Safety technology requires complete recommissioning.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Switch the drive off completely.

  2. 2

    Recommission the safety technology completely.

  3. 3

    Clear the error message using command S-0-0099 (C0500 Reset class 1 diagnostics). This may require switching to parameter mode or a complete drive power cycle.

  4. 4

    Ensure the drive is in operating mode and power is switched on ("Ab").

  5. 5

    Switch on drive enable again (0-1 edge).

  6. 6

    If this fatal error recurs repeatedly, replacement of an entire component (e.g. motor or drive controller) may be necessary.

Browse all codes in this manual (66)
Verified technical data. Last updated: April 2026

Related Faults

E2051Motor overtemp. prewarningE2053Target position out of travel rangeE2054Not homed
Source: Bosch Rexroth IndraDrive C Drive Controllers
Open Manual (Page 304)Search more codes in this manual