Daikin error codes

19 documented Daikin error codes, with meaning, probable causes and a guided diagnostic tree in the app.

HVACIQ

• A3 — Humidifier fault
• A5 — Filter pressure drop high
• A5 — Damper actuator stuck
• A5 — Coil freeze protection
• C9 — Room Temperature Sensor Fault
• E3 — High Pressure Alarm / HP Lockout
• E3 — Sub-cooling fault / sottoraffreddamento anomalo
• E4 — Low Pressure Alarm / LP Lockout
• E5 — Compressor Fault / Overcurrent Protection
• E5 — Compressor Overcurrent / Overload Protection
• E7 — Outdoor Fan Motor Fault
• E7 — Belt broken or slipping
• F3 — Discharge Temperature Too High
• F3 — Capacity unbalance between circuits
• L3 — Oil recovery failure / olio compressore non ritorna
• U0 — Refrigerant Leak / Low Charge
• U4 — Indoor Unit Communication Error
• U4 — Refrigerant addressing error
• U4 — Outdoor unit communication fault

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