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Daikin FXMQ-P - User Manual

Daikin FXMQ-P
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

  • D
    Daniel KnightSep 10, 2025
    What to do for Daikin Air Conditioner error code A0?
    • J
      Jessica ThomasSep 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
    kburgessAug 25, 2025
    What does error code CE mean on my Daikin FXMQ-P Air Conditioner?
    • C
      Carl YoderAug 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.
  • T
    thomasdwayneAug 26, 2025
    What does error code C4 mean on Daikin FXMQ-P Air Conditioner?
    • J
      Jason RossAug 26, 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.
  • J
    Jean BoltonAug 27, 2025
    How to fix Daikin FXMQ-P error code A3?
    • U
      ulongAug 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.
  • K
    Kimberly MitchellAug 29, 2025
    What causes Daikin Air Conditioner error code C9 and how to resolve it?
    • J
      Jessica ContrerasAug 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.
  • L
    Larry RobinsonNov 20, 2025
    What to do if my Daikin FXMQ-P Air Conditioner shows error code AH?
    • N
      Natalie HendersonNov 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...
  • M
    Mark GriffinSep 18, 2025
    What does error code C6 mean on Daikin FXMQ-P?
    • C
      Christopher HillSep 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
    Elizabeth RichardsonSep 22, 2025
    What does error code AJ mean on Daikin FXMQ-P?
    • P
      pfigueroaSep 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).
  • A
    ajohnsonSep 8, 2025
    What does error code UE mean on Daikin FXMQ-P?
    • J
      johnrodriguezSep 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.
  • S
    Sarah WrightSep 6, 2025
    What does error code U9 mean on Daikin FXMQ-P?
    • B
      Brian HowardSep 6, 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

Records changes and updates made to the service manual over time.

2. System description

Explains the overall VRV4 H/R system architecture and components.

3. General operation of VRV heat recovery system

Details the operational principles of the VRV heat recovery system.

4. How to use this book

Provides guidance on navigating the manual and finding specific information.

Part 2. Troubleshooting

1. How to retrieve error code and data?

Guides users on accessing error codes and diagnostic data from remote controllers.

2. Error code based troubleshooting

Lists common error codes with their causes and recommended solutions for troubleshooting.

Part 3. Field settings

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

Configuration settings for Daikin's wireless remote controllers.

2. Wired remote controller BRC2;3 E52

Configuration settings for BRC2/3E52 wired remote controllers.

3. Wired remote controller BRC1 D51;52

Configuration settings for BRC1D51/52 wired remote controllers.

4. Wired remote controller BRC1 E51

Configuration settings for BRC1E51 wired remote controllers.

5. Wired remote controller BRC1 E52

Configuration settings for BRC1E52 wired remote controllers.

6. General indoor units

Common field settings applicable across various Daikin indoor units.

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

Specific field settings for presence sensor accessories.

8. Selfcleaning panel BYCQ140 D7 G

Field settings related to the selfcleaning panel feature.

9. Aircurtain CAV;CYV

Field settings for Daikin air curtain units.

10. VKM

Field settings specific to VKM unit models.

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

Field settings for specific indoor unit series like FXSQ, FXNQ, FXDQ, FXMQ, FXTQ.

12. Factory settings

Instructions for performing factory resets and configuring default settings.

Daikin FXMQ-P Specifications

General IconGeneral
Cooling Capacity2.5kW - 7.1kW
Power Supply220-240V, 50Hz
Energy Efficiency Ratio (EER)Varies by model
Coefficient of Performance (COP)Varies by model
Noise Level (Indoor)19 - 45 dB

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