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Daikin FXDQ-M - Service Manual

Daikin FXDQ-M
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

Other manuals for Daikin FXDQ-M

Questions and Answers

  • J
    Jonathan WagnerSep 10, 2025
    What to do for Daikin FXDQ-M Air Conditioner error code A0?
    • A
      Amanda CarpenterSep 12, 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.
  • K
    Kenneth GreenAug 25, 2025
    What does error code CE mean on my Daikin FXDQ-M?
    • A
      Alexis LongAug 26, 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.
  • H
    hsmithAug 27, 2025
    What does error code C4 mean on Daikin FXDQ-M Air Conditioner?
    • J
      jonathanjonesAug 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.
  • A
    Aaron LangAug 27, 2025
    How to fix Daikin FXDQ-M error code A3?
    • K
      Kimberly CookeAug 28, 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.
  • C
    cowanjamesAug 29, 2025
    What causes Daikin FXDQ-M error code C9 and how to resolve it?
    • P
      Paul WilliamsAug 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.
  • D
    dgriffinNov 20, 2025
    What to do if my Daikin Air Conditioner shows error code AH?
    • B
      Barbara JacksonNov 21, 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...
  • T
    Tamara GarrisonSep 18, 2025
    What does error code C6 mean on Daikin FXDQ-M Air Conditioner?
    • F
      Felicia DixonSep 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.
  • K
    Kenneth WilliamsSep 23, 2025
    What does error code AJ mean on Daikin FXDQ-M Air Conditioner?
    • H
      hesterchadSep 23, 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).
  • L
    Leslie JonesSep 8, 2025
    What does error code UE mean on Daikin Air Conditioner?
    • S
      Stephen TaylorSep 9, 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
    Jaclyn WilliamsSep 5, 2025
    What does error code U9 mean on Daikin FXDQ-M?
    • D
      Dawn GutierrezSep 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

Details the release history and updates of the manual.

2. System description

Explains the concept and components of the VRV4 H/R system.

3. General operation of VRV heat recovery system

Describes the operational principles of the VRV heat recovery system.

4. How to use this book

Provides guidance on navigating and using the service manual effectively.

Part 2. Troubleshooting

1. How to retrieve error code and data?

Instructions for accessing error codes and operational data from controllers.

2. Error code based troubleshooting

Lists common error codes and their causes and solutions.

Part 3. Field settings

1. Wireless remote controller BRC4 C and BRC7 C;E

Details how to access and configure field settings using wireless controllers.

2. Wired remote controller BRC2;3 E52

Explains accessing and adjusting field settings via wired controllers BRC2/3E52.

3. Wired remote controller BRC1 D51;52

Guides on accessing and modifying field settings using wired controller BRC1D51/52.

4. Wired remote controller BRC1 E51

Instructions for accessing and configuring field settings with wired controller BRC1E51.

5. Wired remote controller BRC1 E52

Details on accessing and setting field parameters using wired controller BRC1E52.

6. General indoor units

Covers field settings applicable to most Daikin VRV indoor units.

7. Presence sensor BRYQ140 A7 (for 3 x3 cassette); BRYQ60 A7 (for 2 x2 cassette)

Specific settings related to presence sensors for cassette indoor units.

8. Selfcleaning panel BYCQ140 D7 G

Configuration options for the self-cleaning panel.

9. Aircurtain CAV;CYV

Field settings for air curtain units.

10. VKM

Field settings specific to VKM units.

11. FXSQ-A; FXNQ-A; FXDQ-A; FXMQ-P;MB; FXTQ-A

Field settings for specific indoor unit models like FXSQ, FXNQ, FXDQ etc.

12. Factory settings

Procedures for resetting unit settings to factory defaults.

Daikin FXDQ-M Specifications

General IconGeneral
BrandDaikin
ModelFXDQ-M
CategoryAir Conditioner
LanguageEnglish

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