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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.

bAT

Digital Operator Battery Voltage Low

Yaskawa · Drive Fault Codes

What does bAT mean?

The battery voltage within the digital operator (keypad) is critically low, impacting its ability to retain settings or operate correctly when disconnected from the drive. This indicates a potential data loss risk for parameters or logged data.

Common Causes

  • Internal battery in the digital operator is depleted
  • Battery is faulty or has reached its end of life
  • Poor contact between the battery and its terminals.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Replace the battery in the digital operator following the manufacturer's instructions.

  2. 2

    Clean the battery contacts in the digital operator to ensure good electrical connection.

  3. 3

    Verify proper seating of the replacement battery and check for secure closure of the battery compartment.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

CEMEMOBUS/Modbus Communication ErrorCPF02A/D Conversion ErrorCPF03Control Board Connection Error
Source: Yaskawa Drive Fault Codes
Open Manual (Page 2)Search more codes in this manual