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Daikin Error Codes, Diagnostics & Reset Guides

Mini-Splits, VRV IV, Altherma Heat Pumps & Inverter AC. Country of Origin: Japan / Global. Official fault code database and technician-verified DIY procedures.

Known Daikin Fault Codes

E7 Medium Risk

Air Conditioners & Heat Pumps

The outdoor fan motor is jammed, stalled, or its Hall-effect speed feedback signal is missing, preve...

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U4 Medium Risk

Air Conditioners & Heat Pumps

The microprocessors in the indoor unit and the outdoor condensing unit have lost serial data communi...

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Need to Hard Reset your Daikin Appliance?

Clear lingering digital codes, recalibrate weight sensors, or recover from brief power surges with our manufacturer-specific master reset instructions.

View Daikin Reset Guide →