Daikin Fault Codes

Select a fault code to see its meaning, common causes and how to fix it.

• 8A The Daikin 8A fault code — displayed in full as 8A-46 in Daikin's documentation — indicates that the boiler's freeze… Read more →
• AA The Daikin AA fault code carries two distinct meanings depending on your system type. On Daikin AC, VRV, and split… Read more →
• E3 The Daikin E3 fault code has two distinct meanings depending on your product type. On Daikin gas boilers and heating… Read more →
• HJ-08 The HJ-08 code appears on Daikin boilers when the heating system's water pressure has climbed above the safe operating… Read more →
• U0 The U0 fault code indicates that your Daikin system has detected symptoms consistent with a refrigerant shortage.… Read more →