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Silent Mode Sub Unit Limitation

Silent mode cannot be set using a sub-unit remote control

Mitsubishi Heavy Industries · Packaged Air Conditioners

What does Silent Mode Sub Unit Limitation mean?

The silent mode feature can only be activated from the main remote control unit. If you try to set silent mode using a sub-unit remote, the operation will not be successful.

Common Causes

  • Attempting to set silent mode from a remote control designated as a sub-unit.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure you are using the main remote control unit to set the silent mode.

  2. 2

    If you have multiple remote controls, identify the main unit, which is typically configured as the primary control.

  3. 3

    Only operate the silent mode setting from the main remote control unit.

Browse all codes in this manual (21)
Verified technical data. Last updated: April 2026

Related Faults

Abnormal Compressor NoiseCompressor Making Abnormal Sound or Vibrating — Indicates a serious internal issueAbnormal DisplayAbnormal Display on Electric Component Box/Control Panel — Indicates an electrical issueAbnormal Fan NoiseFan Making Abnormal Sound or Vibrating — Indicates an internal issue
Source: Mitsubishi Heavy Industries Packaged Air Conditioners
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