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TIMER light illuminates

TIMER light illuminates (yellow) — TIMER operation active

MHI · Air Conditioning

What does TIMER light illuminates mean?

The yellow TIMER light on the indoor unit display illuminates. This indicates that a TIMER operation (ON TIMER, OFF TIMER, SLEEP TIMER, or WEEKLY TIMER) is currently active.

Common Causes

  • A timer setting has been activated.
  • The unit is operating according to a programmed schedule.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Confirm the current timer settings on your remote control.

  2. 2

    If you wish to cancel or modify the timer, refer to the 'How to cancel the setting' section in the manual.

  3. 3

    No action needed if the timer operation is intentional.

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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