The causes and solutions for the error code “A5” on a Daikin air conditioner.

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Cause of “A5” Error

  • This is an error code that appears when there is an abnormal temperature in the outdoor unit’s heat exchanger.
    • There is a possibility of either temperature decrease or increase.

How to Fix “A5” Error

  • Stop the operation and clean the filter.
    • If the unit has an automatic filter cleaning function, perform the filter cleaning operation.

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