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Daikin FXSQ-A - User Manual

Daikin FXSQ-A
56 pages
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Service
Manual
VRV4 indoor units
ESIE15-11A
BRYQ-A
BYCQ-D
CAV/CYV
VKM
FXKQ-M
FXFQ-P
FXCQ-A
FXSQ-P
FXDQ-M
FXUQ-A
FXFQ-A
FXMQ-P
FXHQ-A
FXDQ-A
FXZQ-A
FXAQ-P
FXLQ
FXNQ
FXSQ-A
FXTQ-A

Questions and Answers

  • K
    Krista Smith MDSep 10, 2025
    What to do for Daikin FXSQ-A error code A0?
    • Q
      qhermanSep 10, 2025
      If your Daikin Air Conditioner displays error code A0, it may indicate a fault board. Check setting 22-1-3: T1-T2 NC. If correct, it indicates an indoor board fault.
  • M
    Marissa PerezAug 25, 2025
    What does error code CE mean on my Daikin FXSQ-A?
    • L
      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.
  • A
    Anthony FowlerAug 26, 2025
    What does error code C4 mean on Daikin FXSQ-A Air Conditioner?
    • J
      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.
  • B
    Brian GreenAug 27, 2025
    How to fix Daikin FXSQ-A error code A3?
    • A
      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.
  • S
    stephaniepierceAug 29, 2025
    What causes Daikin FXSQ-A error code C9 and how to resolve it?
    • G
      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.
  • S
    sherrywatsonNov 20, 2025
    What to do if my Daikin FXSQ-A Air Conditioner shows error code AH?
    • J
      Jason ChaneyNov 20, 2025
      If your Daikin Air Conditioner displays error code AH, there are several potential causes related to the self-cleaning function. Here's what you can check: * **Communication Error:** Verify the wire harness connections between the main PCB and the self-cleaning PCB. * **Dust Detection Sensor Error:** Inspect the wire harness connections for the dust detection sensor. * **Dust Collection Error:** Look for any clogging caused by dust between the brush-arm and the dust collector box. * **Air Filter Rotation Error:** Examine the rotation mechanism of the air filter. * **Damper Rotation Error:** Check the rotation mechanism of the damper. * **Filter Cleaning Time Error:** This may occur if the filter auto-cleaning program could not be performed during a 24-hour operation. * **Aut...
  • H
    Haley WhiteSep 18, 2025
    What does error code C6 mean on Daikin Air Conditioner?
    • M
      mercedesjonesSep 18, 2025
      Daikin Air Conditioner error code C6 indicates a faulty combination of the main PCB and the inverter PCB fan motor. Change the inverter PCB fan motor to the correct type.
  • E
    Emily MurphySep 22, 2025
    What does error code AJ mean on Daikin FXSQ-A?
    • J
      John RobertsSep 22, 2025
      Daikin Air Conditioner error code AJ can be caused by: * **Capacity adaptor missing:** Add the corresponding capacity adaptor onto the spare part PCB. * **Incorrect expansion valve motor:** Use the correct expansion valve motor (between gear type and direct drive).
  • C
    Charles ButlerSep 8, 2025
    What does error code UE mean on Daikin FXSQ-A?
    • D
      Dawn BoydSep 8, 2025
      Daikin Air Conditioner error code UE indicates a communication error with the central control device. Check the communication from the indoor unit to central control. Verify the existing group number set on the indoor unit and the registered group number in the central control.
  • J
    Jason BauerSep 5, 2025
    What does error code U9 mean on Daikin Air Conditioner?
    • S
      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.

Summary

Part 1. Introduction

1. Version Log

Provides a log of document versions and their release dates.

Part 2. Troubleshooting

1. How to Retrieve Error Code and Data

Guides on accessing error codes and operational data from remote controllers.

2. Error Code Based Troubleshooting

Lists error codes, causes, and recommended solutions for troubleshooting.

Part 3. Field Settings

1. Wireless Remote Controller BRC4 C and BRC7 C;E

Details on accessing and configuring field settings for wireless controllers.

2. Wired Remote Controller BRC2;3 E52

Instructions for accessing and modifying field settings on wired controllers.

3. Wired Remote Controller BRC1 D51;52

Procedures for accessing and configuring field settings for BRC1D51/52 controllers.

4. Wired Remote Controller BRC1 E51

Steps to access and adjust field settings on the BRC1E51 wired controller.

5. Wired Remote Controller BRC1 E52

Guide to accessing and configuring field settings for the BRC1E52 controller.

6. General Indoor Units

Field settings applicable to most Daikin VRV indoor unit models.

7. Presence Sensor BRYQ140 A7; BRYQ60 A7

Configuration options for presence sensors used with specific cassette types.

8. Selfcleaning Panel BYCQ140 D7 G

Settings related to the self-cleaning panel functionality.

9. Aircurtain CAV;CYV

Field settings for Aircurtain CAV/CYV units.

10. VKM Units

Configuration options for VKM units.

11. Specific Indoor Unit Settings (FXSQ, FXNQ, FXDQ, FXMQ, FXTQ)

Field settings specific to FXSQ, FXNQ, FXDQ, FXMQ, and FXTQ series indoor units.

12. Factory Settings

Instructions on how to perform a factory reset of unit settings via the remote controller.

Daikin FXSQ-A Specifications

General IconGeneral
BrandDaikin
ModelFXSQ-A
CategoryAir Conditioner
LanguageEnglish

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