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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.

E1

Remote Controller Control Board Nonvolatile Memory Error

Mitsubishi Electric · PUZ-HA30/36NHA4 Outdoor Unit

What does E1 mean?

Data cannot be read normally from the nonvolatile memory of the remote controller control board. This indicates a defective remote controller.

Common Causes

  • Nonvolatile memory on the remote controller's control board has failed.
  • Corruption or erasure of stored configuration data.
  • Hardware failure of the memory chip.
  • Power surge affecting the control board.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Replace the remote controller.

Browse all codes in this manual (45)
Verified technical data. Last updated: April 2026

Related Faults

01Overvoltage Error02Undervoltage Error04L1 or L2-Phase Open Error
Source: Mitsubishi Electric PUZ-HA30/36NHA4 Outdoor Unit
Open Manual (Page 29)Search more codes in this manual