14-time blink or more 2.5-second OFF

General Undefined Abnormality

Mitsubishi · MSZ-FH06-18NA Heat Pump System

What does 14-time blink or more 2.5-second OFF mean?

This fault indicates that an abnormality other than the specifically defined fault codes has been detected within the system. It serves as a general alert for an unusual condition that requires deeper investigation, potentially involving multiple interconnected issues or a component not individually listed. The unit's operation will be impaired until the underlying cause is identified.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    If available, use the failure mode recall function for the outdoor unit to look for any more specific or historical fault data that might point to the root cause.

  2. 4

    Perform a comprehensive visual and auditory inspection of all major components for any unusual noises, leaks, vibrations, or signs of overheating.

  3. 5

    Refer to the outdoor unit service manual for additional, more generalized troubleshooting steps or flowcharts.

Source: Mitsubishi MSZ-FH06-18NA Heat Pump System
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