Daikin FDN Series - User Manual

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TECHNICAL MANUAL

Split Systems Air Conditioner

Ducted Blower H Series

FDN/FGN-H Series

— Cooling Only [50Hz] —

R410A

TM-5SBH-MSS-STA3

Supersede : TM-5SBH-MSS-STA2

Questions and Answers

D
Denise MendozaAug 12, 2025
Why is my Daikin FDN Air Conditioner airflow so weak and not cooling the room?
- D
  dkimAug 12, 2025
  If your Daikin Air Conditioner's airflow is too slow, or the room isn't cooling enough, several factors could be at play. First, check the air filter; a dirty filter can significantly impede airflow, so clean it. Ensure that all doors and windows are closed to prevent warm air from entering the room. Also, make sure that neither the air suction nor the discharge vents of the indoor and outdoor units are blocked. Finally, verify that the temperature setting is appropriately low.
K
Kimberly RandolphAug 16, 2025
Why does my Daikin Air Conditioner discharge airflow have a bad odor?
- R
  Robert KingAug 16, 2025
  If your Daikin Air Conditioner emits a bad odor, it could be due to smoke particles, perfume, or other substances that have stuck to the coil. It is recommended to contact your nearest dealer.
J
Joseph GillespieAug 19, 2025
How to restart Daikin FDN Air Conditioner after power failure?
- T
  Tammie GarrettAug 19, 2025
  If your Daikin Air Conditioner unit doesn't turn back on after a power outage, try turning on the unit using the wireless or wired controller.
C
Christopher ThomasAug 23, 2025
What to do if water is flowing out from my Daikin FDN?
- D
  Donald CarlsonAug 25, 2025
  If water is flowing out of your Daikin Air Conditioner, switch off the unit and contact your nearest dealer.
H
Hunter OrrAug 27, 2025
Why does my Daikin FDN Air Conditioner compressor operate continuously?
- D
  doylemichaelAug 27, 2025
  If the compressor in your Daikin Air Conditioner runs non-stop, the issue might stem from a few causes. A dirty air filter can cause the compressor to work harder than necessary, so start by cleaning it. Also, check your temperature settings: if you're cooling, the temperature might be set too low; if you're heating, it might be too high. Adjust the temperature accordingly to see if that resolves the issue.
A
Alejandro WilliamsAug 30, 2025
What to do if there is condensation on the front air grille of my Daikin FDN Air Conditioner?
- C
  Crystal HillAug 30, 2025
  If you notice condensation on the front grille of your Daikin Air Conditioner's indoor unit, it's likely due to air humidity after prolonged use. To address this, try increasing the temperature setting and running the unit at a high fan speed.
C
Christy DavisSep 4, 2025
What is the reason for hissing airflow sound from Daikin FDN unit?
- K
  kdavisSep 4, 2025
  If you hear a hissing sound from your Daikin Air Conditioner during operation, it is caused by liquid refrigerant flowing into the evaporator coil.
K
Krista HunterSep 7, 2025
Why doesn't the compressor start immediately on my Daikin Air Conditioner?
- R
  Robert WarrenSep 7, 2025
  If your Daikin Air Conditioner doesn't start the compressor immediately after being turned on, it might be due to a built-in protection mechanism that prevents frequent starts. Wait for approximately 3 to 4 minutes, and the compressor should start automatically.

Summary

Application Information

Operating Range

Refrigerant Circuit Diagram

Indoor Unit Installation Guideline

Instructions for installing indoor units, including mounting and wiring.

Outdoor Unit Installation and Clearance

Guidelines for outdoor unit placement, ventilation, and clearance.

Refrigerant Piping

Maximum Piping Length and Bends

Guidelines for pipe length, bends, and equivalent lengths.

Additional Refrigerant Charge

Selection Process

Drive Package Selection

Details design requirements and calculations for the drive package.

Fan Performance Curves

Engineering & Physical Data

Model Specifications

Detailed technical and physical data for various models.

Performance Data

Calculation Steps for Performance Data

Performance Tables

Wiring Diagrams

Cooling Only Wiring Diagrams

Service & Maintenance

General Maintenance Procedures

Caution for Use

Troubleshooting

Fault Conditions and Causes

Lists common problems and their possible causes.

Error Codes

Interprets error codes displayed by wired handsets.

Phase Sequencer Faults

Summary

Application Information

Operating Range

Refrigerant Circuit Diagram

Indoor Unit Installation Guideline

Instructions for installing indoor units, including mounting and wiring.

Outdoor Unit Installation and Clearance

Guidelines for outdoor unit placement, ventilation, and clearance.

Refrigerant Piping

Maximum Piping Length and Bends

Guidelines for pipe length, bends, and equivalent lengths.

Additional Refrigerant Charge

Selection Process

Drive Package Selection

Details design requirements and calculations for the drive package.

Fan Performance Curves

Engineering & Physical Data

Model Specifications

Detailed technical and physical data for various models.

Performance Data

Calculation Steps for Performance Data

Performance Tables

Wiring Diagrams

Cooling Only Wiring Diagrams

Service & Maintenance

General Maintenance Procedures

Caution for Use

Troubleshooting

Fault Conditions and Causes

Lists common problems and their possible causes.

Error Codes

Interprets error codes displayed by wired handsets.

Phase Sequencer Faults

Daikin FDN Series Specifications

General

Brand	Daikin
Model	FDN Series
Category	Air Conditioner
Language	English

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