EL
ErrorLib
Brands
||
  1. Home
  2. Fanuc
  3. Alpha i Series Servo Amplifier
  4. PW0016
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.

PW0016

RAM CHECK ERROR

Fanuc · Alpha i Series Servo Amplifier

What does PW0016 mean?

The CNC detected an error in its RAM check function. This indicates a critical memory fault within the CNC, which can lead to unstable operation or data loss. A power cycle is required.

Common Causes

  • CNC system RAM hardware failure.
  • Data corruption within the CNC's main memory.
  • Power fluctuations during CNC operation causing RAM errors.
  • Overheating affecting RAM module stability.
  • Faulty RAM module installation.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Perform a CNC system power cycle.

  2. 2

    Check for any diagnostic LEDs indicating RAM failure on the CNC board.

  3. 3

    Reseat the CNC RAM modules if accessible.

  4. 4

    Measure CNC power supply voltages for stability.

  5. 5

    If the fault persists, replace the CNC RAM modules.

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 125)Search more codes in this manual