Reset procedure: Turn off main breaker, wait 5 minutes, restore power
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Contact authorized DAIKIN service center with error code if persists
Preventive Tip
Clean filters every 2 weeks. Schedule professional maintenance every 6 months. Don't ignore error codes - address immediately. Keep outdoor unit clear of obstructions.
References & Further Reading
These resources provide additional technical information and official documentation.
U4 (communication error between indoor and outdoor units) is most common. Usually fixed by resetting power for 5 minutes. If it persists, check for loose wiring connections.
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No, turn it off immediately. Continuing to run with an error can cause more expensive damage. Note the exact code and contact service. Take a photo of the code display for reference.
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Yes! Power surges, brownouts, or voltage fluctuations commonly trigger U2 errors. Use a voltage stabilizer if you have frequent power issues. Check if other appliances dim when the AC starts.
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A flashing timer light (without a code) usually indicates a sensor error or that the unit is in defrost mode. If it flashes continuously for more than 30 minutes, check your manual for the specific flash pattern meaning.