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E28

E28 - Remote controller sensor failure

Mitsubishi Heavy Industries · R410A Systems

What does E28 mean?

The sensor within the remote controller has failed. This sensor is typically used to read the ambient temperature at the remote control's location, impacting temperature regulation.

Common Causes

  • Malfunctioning sensor in the remote controller.
  • Damaged remote controller.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the air conditioning unit for a few minutes, then restart.

  2. 2

    Check if replacing the batteries in the remote controller resolves the issue.

  3. 3

    Try using a different remote controller if available, or operating the unit via the indoor unit's manual controls.

  4. 4

    If the error persists, the remote controller may need to be replaced.

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

Related Faults

E0E0 - Transmitting/receiving signal errorE12E12 - Auto address setting error or unit addressed at factory settingE14E14 (Flashes 3 times) - Master/slave system control wiring error
Source: Mitsubishi Heavy Industries R410A Systems
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