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Alarm code

Alarm code displayed — Unit fault detected

MHI · Air Conditioning

What does Alarm code mean?

The digital display area shows an alarm code, indicating a general operational fault or issue within the refrigeration unit. This code is crucial for diagnosing specific problems.

Common Causes

  • Unspecified operational malfunction
  • Component failure
  • Sensor error
  • System anomaly requiring service

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Note the exact alarm code number or message appearing on the digital display.

  2. 2

    Record the current setting temperature and the present inside container temperature.

  3. 3

    Describe the specific condition of the trouble, detailing any other visible or audible symptoms.

  4. 4

    Contact your nearest dealer for support, providing them with all collected information including the alarm code.

Browse all codes in this manual (124)
Verified technical data. Last updated: April 2026

Related Faults

00Outdoor Board LED only green lights up after startup - No outdoor unit of address 0 / Remote controller transmission wire open1OPERATION INDICATOR lamp blinks 1 time (Pattern A) - Indoor/outdoor unit communication error (Transmitting error - Outdoor unit)14OPERATION INDICATOR lamp blinks 14 times (Pattern A) - Other errors
Source: MHI Air Conditioning
Open Manual (Page 82)Search more codes in this manual