Daikin FDMQ12RVJU - User Manual

Other manuals for Daikin FDMQ12RVJU

Service Manual299 pages

Installation Manual22 pages

Operation Manual12 pages

Questions and Answers

X
xgriffinAug 14, 2025
What to do if the operation lamp is blinking on my Daikin FDMQ12RVJU?
- A
  arthur88Aug 14, 2025
  If the operation lamp on your Daikin Air Conditioner is blinking, you should first perform the diagnostic procedure. Also, ensure all indoor units connected to a multi-system outdoor unit are set to the same operation mode. If they aren't, set all indoor units to the same operation mode and check if the operation lamp stops blinking. You can also try setting all indoor units to cooling or heating mode to see if the operation lamp returns to normal.
A
austinemilyAug 18, 2025
Why is my Daikin Air Conditioner cooling effect poor?
- A
  Anna SmithAug 18, 2025
  If your Daikin Air Conditioner isn't cooling or heating effectively, try these steps: * Ensure the air filters are clean. * Check for and remove any obstructions blocking the air inlet or outlet of both the indoor and outdoor units. * Verify that the temperature setting is appropriate for your needs. * Make sure all windows and doors are properly closed. * Confirm that the air flow rate and direction are set correctly.
D
Danny PerezAug 21, 2025
Why Daikin FDMQ12RVJU does not operate?
- B
  Bridget BrownAug 21, 2025
  If your Daikin Air Conditioner isn't operating and the OPERATION lamp is off, check the following: * Ensure the circuit breaker hasn’t been turned OFF or a fuse hasn't blown. Check the circuit breaker. * Confirm there isn’t a power failure. * Verify that batteries are correctly installed in the remote controller. Install batteries if needed. * Check the timer setting to ensure it is correct.
N
Nathan HowardAug 25, 2025
How to fix Daikin FDMQ12RVJU Air Conditioner if operation does not start soon?
- J
  Justin PerkinsAug 25, 2025
  If your Daikin Air Conditioner operation does not start soon after pressing the ON/OFF button or reselecting the mode, you should wait for about 3 minutes.
B
Brandy DayAug 28, 2025
What to do if Daikin FDMQ12RVJU Air Conditioner operation stops suddenly?
- C
  Courtney RamirezAug 28, 2025
  If the Daikin Air Conditioner operation stops suddenly and the OPERATION lamp is flashing, it could be due to: * Dirty air filters, so clean them. * Obstructions blocking the air inlet or outlet of the indoor or outdoor units, so remove any obstacles. * Inconsistent operation modes for indoor units connected to outdoor units in a multi system, so set all indoor units to the same operation mode.
P
Priscilla MercerAug 30, 2025
Why HEAT operation stops suddenly in Daikin Air Conditioner?
- A
  Amber WhiteAug 31, 2025
  If the HEAT operation on your Daikin Air Conditioner stops suddenly and you hear a flowing sound, the system is likely removing frost from the outdoor unit. Please wait for approximately 4 to 12 minutes.
M
Melissa AlexanderSep 3, 2025
What to do if Daikin Air Conditioner operation stopped suddenly?
- K
  Kimberly RoseSep 3, 2025
  If the Daikin Air Conditioner operation stopped suddenly (OPERATION lamp is on), it might be due to a sudden large voltage fluctuation. The system is designed to protect itself and will automatically resume operation in about 3 minutes.
T
Tim RobinsonSep 7, 2025
Why does no air come out of my Daikin Air Conditioner?
- C
  Connie YoungSep 7, 2025
  If your Daikin Air Conditioner isn't emitting air, especially during HEAT operation or defrosting, allow 1 to 4 minutes for the air to start flowing. If the air conditioner operates immediately after the circuit breaker is turned on, allow 3 to 20 minutes.
B
Brad ChungSep 9, 2025
What to do if Daikin FDMQ12RVJU has an abnormal functioning during operation?
- A
  alec15Sep 10, 2025
  If your Daikin Air Conditioner is malfunctioning during operation, it might be due to lightning or radio waves. Turn the breaker OFF, then turn it ON again, and try operating the air conditioner with the remote controller.

Summary

Part 1 List of Functions

1. Functions Overview

Provides a comprehensive list of all available operational functions for the unit.

Part 2 Specifications

1. Model Specifications

Details technical specifications including capacity, dimensions, power, and materials.

Part 3 Printed Circuit Board Wiring Diagrams

1. Indoor Unit Wiring Diagram

Illustrates the internal wiring and component connections for the indoor unit.

4. Outdoor Unit Wiring Diagram

Shows the internal wiring and component connections for the outdoor unit.

Part 4 Functions and Control

1. Main Functions

Details the primary operational modes and features of the air conditioning system.

2. Control Specification

Explains the system's control logic, modes, and operational parameters.

Part 5 Remote Controller

1. Wired Remote Controller

Operation and features of the wired remote controller unit.

2. Wireless Remote Controller

Operation and features of the wireless remote controller unit.

Part 6 Service Diagnosis

1. General Problem Symptoms

Identifies common symptoms and initial troubleshooting steps for system issues.

4. Troubleshooting Common Errors

Provides detailed troubleshooting guides for specific error codes and malfunctions.

Part 7 Trial Operation and Field Settings

1. Pump Down Operation

Procedure for safely removing refrigerant before relocating or disposing of the unit.

3. Trial Operation

Guidelines for conducting operational tests after installation and setup.

4. Field Settings Configuration

Instructions for adjusting unit settings based on installation environment and accessories.

Part 8 Appendix

1. Piping Diagrams

Visual representation of refrigerant and drain piping configurations for indoor and outdoor units.

2. Wiring Diagrams

Schematics detailing electrical connections between indoor, outdoor, and control units.

1. Safety Cautions

1.1 Worker Safety Warnings

Essential safety precautions for technicians during repair and maintenance operations.

1.2 User Safety Warnings

Important safety guidelines for end-users to prevent accidents and ensure proper operation.

2. Icons Used

Part 1 List of Functions

1. Functions Overview

Provides a comprehensive list of all available operational functions for the unit.

Part 2 Specifications

1. Model Specifications

Details technical specifications including capacity, dimensions, power, and materials.

Part 3 Printed Circuit Board Connector Wiring Diagram

1. Indoor Unit Wiring Diagram

Illustrates the internal wiring and component connections for the indoor unit.

2. Wired Remote Controller Diagram

Shows the wiring and connections for the wired remote controller.

3. Wireless Remote Controller Receiver Diagram

Illustrates the wiring for the wireless remote controller receiver.

4. Outdoor Unit Wiring Diagram

Shows the internal wiring and component connections for the outdoor unit.

Part 4 Functions and Control

1. Main Functions

Details the primary operational modes and features of the air conditioning system.

2. Control Specification

Explains the system's control logic, modes, and operational parameters.

1.1 Temperature Control

1.2 Frequency Principle

1.3 Fan Speed Control

1.4 Program Dry Operation

1.5 Clock and Calendar Setting

1.6 Schedule Timer Operation

1.7 Drain Pump Control

1.8 Hot Start Control

1.9 Other Functions

2.1 Mode Hierarchy

2.2 Frequency Control

2.3 Controls at Mode Changing;Start-up

2.4 Discharge Pipe Temperature Control

2.5 Input Current Control

2.6 Freeze-up Protection Control

2.7 Heating Peak-cut Control

2.8 Outdoor Fan Control

2.9 Liquid Compression Protection Function

2.10 Defrost Control

2.11 Electronic Expansion Valve Control

2.12 Malfunctions

Part 5 Remote Controller

1. Wired Remote Controller

Operation and features of the wired remote controller unit.

2. Wireless Remote Controller

Operation and features of the wireless remote controller unit.

Part 6 Service Diagnosis

1. General Problem Symptoms

Identifies common symptoms and initial troubleshooting steps for system issues.

2. Troubleshooting with LED

Guides troubleshooting based on LED indicators on indoor and outdoor units.

3. Service Diagnosis Procedures

Outlines diagnostic steps for remote controller and system checks.

4. Troubleshooting Common Errors

Provides detailed troubleshooting guides for specific error codes and malfunctions.

5. Checks and Procedures

Component Checks Overview

Details checks for thermistors, motors, valves, PCBs, and circuits.

1. General Problem Symptoms and Check Items

2. Troubleshooting with LED

3. Service Diagnosis Procedures

4. Troubleshooting Common Errors

5. Checks and Procedures

Component Checks Overview

Details checks for thermistors, motors, valves, PCBs, and circuits.

Part 7 Trial Operation and Field Settings

1. Pump Down Operation

Procedure for safely removing refrigerant before relocating or disposing of the unit.

2. Forced Cooling Operation

Procedure for forcing the unit into cooling mode for testing or maintenance.

3. Trial Operation

Guidelines for conducting operational tests after installation and setup.

4. Field Settings Configuration

Instructions for adjusting unit settings based on installation environment and accessories.

4.1 How to Change the Field Settings

4.2 Overview of the Field Settings

4.3 MAIN;SUB and Address Setting

4.4 Facility Setting (Low Outdoor Temp)

5. Silicone Grease Application

Part 8 Appendix

1. Piping Diagrams

Visual representation of refrigerant and drain piping configurations for indoor and outdoor units.

2. Wiring Diagrams

Schematics detailing electrical connections between indoor, outdoor, and control units.

3. Operation Limit

Charts showing the operational limits based on indoor and outdoor temperatures.

1.1 Indoor Unit Piping

1.2 Outdoor Unit Piping

2.1 Indoor Unit Wiring

2.2 Outdoor Unit Wiring

Daikin FDMQ12RVJU Specifications

General

Category	Air Conditioner
Cooling Capacity	3.5 kW
Heating Capacity	4.0 kW
Refrigerant	R32
Power Supply	50Hz
Noise Level (Outdoor Unit)	50 dB
Indoor Unit Dimensions (WxHxD)	800 x 295 x 200 mm