Daikin FXSQ-A User Manual (English)

Questions and Answers:

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Ashlee RobinsonAug 23, 2025
What does error code A6 mean on my Daikin FXSQ-A and how to fix it?
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  Joseph EllisAug 23, 2025
  Error code A6 on your Daikin Air Conditioner indicates a problem with the fan motor. This could be due to several reasons: * **Fan motor locked:** The RPM counter may not be sending a signal from the motor to the indoor main board when outputting. * **Fan motor overcurrent:** Check the motor power circuit. You may need to replace the fan motor or the indoor board. * **Fan motor locked:** The RPM counter may not be sending a signal even when the unit is off.
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Marissa PerezAug 25, 2025
What does error code CE mean on my Daikin FXSQ-A?
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  Lisa GarrisonAug 25, 2025
  Error code CE on your Daikin Air Conditioner indicates a problem with an optional sensor. The issue could stem from: * **No signal from optional presence sensor:** Check the wire harness connections. * **No signal from optional floor temperature sensor:** Check the wire harness connections. * **Faulty signal from optional floor temperature sensor:** Check the pins connector for a short circuit. * **High temperature detection or electric noise floor temperature sensor:** Check the resistance of the floor temperature sensor.
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Anthony FowlerAug 26, 2025
What does error code C4 mean on Daikin FXSQ-A Air Conditioner?
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  James SmithAug 27, 2025
  Error code C4 on your Daikin Air Conditioner indicates a problem with the coil thermistor. This could be due to: * **Coil thermistor short circuit:** Check the coil thermistor resistance. * **Coil thermistor open circuit:** Check the wire harness connections to the coil thermistor.
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Brian GreenAug 27, 2025
How to fix Daikin FXSQ-A error code A3?
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  Ashley GreenAug 27, 2025
  Daikin Air Conditioner error code A3 indicates that the float switch is open during thermo on (cooling). To resolve this issue: * Check the float switch status. * Ensure there is no blockage in the drain pipe. * Verify that the drain pipe raiser is less than 600 mm.
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stephaniepierceAug 29, 2025
What causes Daikin FXSQ-A error code C9 and how to resolve it?
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  Gabriel ChavezAug 29, 2025
  Daikin Air Conditioner error code C9 is related to the air thermistor. The cause may be: * **Air thermistor short circuit:** Check the air thermistor resistance. * **Air thermistor open circuit:** Check the wire harness connections to the air thermistor.
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smithbrandonAug 30, 2025
Why does my Daikin FXSQ-A show error code A7?
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  Alex MillerAug 30, 2025
  Daikin Air Conditioner error code A7 indicates that there is no detection contact with the swing motor. To troubleshoot: * Check if the swing motor runs when output is 230VAC. * Check the contact position detection for open and close states.
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Nicole MartinezSep 1, 2025
How to troubleshoot Daikin FXSQ-A error code C5?
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  Joseph HannaSep 1, 2025
  Daikin Air Conditioner error code C5 indicates a problem with the gas thermistor. This may be caused by: * **Gas thermistor short circuit:** Check the gas thermistor resistance. * **Gas thermistor open circuit:** Check the wire harness connections to the gas thermistor.
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kallenSep 2, 2025
What does Daikin Air Conditioner error code AF mean?
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  Amber SimsSep 3, 2025
  Daikin Air Conditioner error code AF indicates that the float switch is open during thermo off. To resolve this: * Check for drain water returning from other indoor units. * Ensure the expansion valve is correctly closing during thermo off.
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davismatthewSep 4, 2025
What does error code U4 mean on Daikin FXSQ-A?
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  mcgrathmichaelSep 4, 2025
  Daikin Air Conditioner error code U4 indicates a communication error between the indoor unit and the BS unit. Check the communication between the BS unit and the indoor unit(s).
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Jason BauerSep 5, 2025
What does error code U9 mean on Daikin Air Conditioner?
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  Susan DennisSep 5, 2025
  Daikin Air Conditioner error code U9 indicates a communication error between other indoor units and the BS unit. Check other indoor units for errors other than U9.