13-time blink 2.5 seconds OFF — Bus-bar voltage (DC) detection abnormality

What does 13-time blink 2.5 seconds OFF mean?

The outdoor unit LED blinks 13 times with a 2.5-second pause. This indicates that the bus-bar voltage of the inverter cannot be detected normally. This can happen due to instantaneous power voltage drops or short-time power failures, especially for MUZ-AP71 models.

• Instantaneous power voltage drop (short-time power failure)
• Abnormal bus-bar voltage detection
• Issue with the inverter/compressor system

Click steps to track your progress.

1. 1

   Check your home's power supply for any recent fluctuations or outages.

2. 2

   Power cycle the air conditioner by turning off the circuit breaker for 30 seconds, then turning it back on.

3. 3

   If the problem persists, a qualified technician should check the power supply and the inverter/compressor.