Daikin · room air conditioner
This error code signifies a malfunction with the humidity sensor inside the indoor unit. This sensor is responsible for detecting and regulating room humidity levels.
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Ensure the indoor unit is not located in an area with excessively high or low humidity that could be confusing the sensor.
Turn off the main power to the unit for 30 seconds, then turn it back on to reset the system.
If the error code remains, contact a qualified service technician.