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TIMER light 1-time flash

TIMER light 1-time flash — Current cut / Overcurrent

MHI · Air Conditioning

What does TIMER light 1-time flash mean?

The TIMER light flashes once, indicating a current cut or overcurrent situation. This means the unit detected an electrical current higher than normal, often a safety measure.

Common Causes

  • Overload operation
  • Overcharge of refrigeration
  • Defective outdoor unit boards

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the air conditioner and unplug it for a few minutes, then plug it back in and restart.

  2. 2

    Check if other high-power appliances are running on the same circuit, which could cause an overload.

  3. 3

    Ensure the air filters are clean to prevent the unit from working harder than necessary.

  4. 4

    If the problem persists, contact your dealer for inspection of the electrical system and refrigeration charge.

  5. 5

    Verify the circuit breaker for the air conditioner has not tripped.

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
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