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CRC CHECK ERROR:NC BASIC.

CRC CHECK ERROR:NC BASIC.

Fanuc · Alpha i Series Servo Amplifier

What does CRC CHECK ERROR:NC BASIC. mean?

A CRC error occurred in the CNC BASIC ROM. This indicates data corruption in the Read-Only Memory module containing the CNC BASIC program, which can prevent the CNC from functioning correctly.

Common Causes

  • CRC check failure on the NC (Numerical Control) basic software modules.
  • Corruption in the core NC firmware or operating system.
  • Data integrity issue with essential NC program files.
  • Failed firmware update of the NC system.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Install the CNC BASIC ROM in flash memory again.

Browse all codes in this manual (101)
Verified technical data. Last updated: April 2026

Related Faults

0233Velocity Pulse Count Exceeded0243Position Pulse Count Exceeded0434Velocity Loop Integral Gain Overflow
Source: Fanuc Alpha i Series Servo Amplifier
Open Manual (Page 126)Search more codes in this manual