EL
ErrorLib
Brands
||
  1. Home
  2. Fanuc
  3. Series 30i CNC
  4. P
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.

P

Communication Error (Amplifier and Module)

Fanuc · Series 30i CNC

What does P mean?

A communication error has occurred between the amplifier and its module. This prevents proper data exchange and control signals, which can lead to system malfunction or inability to operate the connected equipment.

Common Causes

  • Defective connector or cable (CXA2A/B) between the amplifier and module
  • Defective control printed-circuit board within the amplifier or module

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the connector and cable (CXA2A/B) for any damage, loose connections, or incorrect routing

  2. 2

    Replace the control printed-circuit board within the affected unit (amplifier or module)

  3. 3

    Replace the SVM unit if the communication error persists after checking cabling and replacing the control board

Browse all codes in this manual (20)
Verified technical data. Last updated: April 2026

Related Faults

1Inverter Internal Cooling Fan Stop (SVM)2Inverter Control Power Supply Undervoltage (SVM)3PSM Main Circuit Heat Sink Overheat
Source: Fanuc Series 30i CNC
Open Manual (Page 124)Search more codes in this manual