English 1CONTENTSREAD BEFORE OPERATIONSafety precautions....................................................................... 2Names of parts ............................................................................ 4Preparation Before Operation ..................................................... 7OPERATIONAUTO · DRY · COOL · HEAT · FANOperation................................................................................... 10Adjusting the Airflow Direction................................................... 12POWERFUL Operation ............................................................. 14OUTDOOR UNIT SILENT Operation ....................................... 15HOME LEAVE Operation .......................................................... 16INTELLIGENT EYE Operation .................................................. 18TIMER Operation ...................................................................... 20CARECare and Cleaning .................................................................... 22TROUBLE SHOOTINGTrouble Shooting ....................................................................... 25

operation manual

Safety precautions

Names of parts

i outdoor unit

remote controller

Preparation Before Operation

Operation

Adjusting the Airflow Direction

POWERFUL Operation

OUTDOOR UNIT SILENT Operation

HOME LEAVE Operation

INTELLIGENT EYE Operation

TIMER Operation

Care and Cleaning

i air filter

before a long idle period

Trouble Shooting

disposal requirements

Daikin FTXS18DVJU Operation Manual

safety cautions

Part 1 List of Functions

List of Functions

Part 2 Specifications

Specifications

Part 3 Printed Circuit Board Connector Wiring Diagram

Printed Circuit Board Connector Wiring Diagram

FTXS15/18/24DVJU

RX09/12FVJU

RX15/18/24FVJU

Part 4 Function and Control

Main Functions

Power-Airflow Dual Flaps, Wide-Angle Louvres and Auto-Swing

fan speed control

Programme Dry Function

Automatic Operation

Thermostat Control

NIGHT SET Mode

INTELLIGENT EYE

inverter powerful operation

Other Functions

Function of Thermistor

Control Specification (09/12 Class)

Frequency Control

Controls at Mode Changing / Start-up

Discharge Pipe Temperature Control

Input Current Control

Heating Peak-cut Control

Defrost Control

Electronic Expansion Valve Control

Malfunctions

Forced Operation Mode

Control Specification (15/18/24 Class)

Freeze-up Protection Control

Fan Control

Low Hz High Pressure Limit

Part 5 Operation Manual

System Configuration

Instruction

FTXS09/12DVJU

Part 6 Service Diagnosis

Caution for Diagnosis

Problem Symptoms and Measures

Service Check Function

Troubleshooting

Indoor Unit PCB Abnormality

Fan Motor or Related Abnormality

Thermistor or Related Abnormality (Indoor Unit)

Signal Transmission Error (between Indoor and Outdoor Unit)

Compressor Lock

dc fan lock

Input Over Current Detection

Four Way Valve Abnormality

High Pressure Control in Cooling

Position Sensor Abnormality

DC Voltage / Current Sensor Abnormality

CT or Related Abnormality

Thermistor or Related Abnormality (Outdoor Unit)

SiUS04

Electrical Box Temperature Rise

Radiation Fin Temperature Rise

Output Over Current Detection

Insufficient Gas

Over-voltage Detection

Low-voltage Detection

Check

four way valve performance check

installation condition check

outdoor unit fan system check

power supply waveforms check

capacitor voltage check

main circuit electrolytic capacitor check

hall ic check

Part 7 Removal Procedure

removal of front grille

Removal of Front Grille

Removal of Horizontal Blade and Vertical Blade

removal of heat exchanger

install of drain plug

front grille

Removal of the Electrical Box / PCB / Swing Motor

Removal of the Heat Exchanger

Removal of the Fan Rotor / Fan Motor

FTXS15DVJU

safety considerations

using icons

Outdoor Units

Outdoor Unit

service monitor pcb

Fan Speed Control for Indoor Units

Program Dry Function

Temperature Control

Night Set Mode

Inverter POWERFUL Operation

Control Specification

Discharge Pipe Control

Wiring-Error Check

Additional Functions

Safety Precautions

Names of Parts

outdoor unit

preparation before operation

tips for saving energy

AUTO · DRY · COOL · HEAT · FAN Operation

to change the airflow rate setting

OUTDOOR UNIT QUIET Operation

to use on timer operation

Note for Multi System

priority room setting

air filter

front panel

cleaning the air filter

Code Indication on the Remote Controller

Indoor Units

Freeze-up Protection Control or High Pressure Control

Signal Transmission Error (between Indoor and Outdoor Units)

Unspecified Voltage (between Indoor and Outdoor Units)

Outdoor Unit PCB Abnormality

OL Activation (Compressor Overload)

DC Fan Lock

Four-Way Valve Abnormality

Compressor Sensor System Abnormality

Low-voltage Detection or Over-voltage Detection

Signal Transmission Error (on Outdoor Unit PCB)

anti-icing function in other rooms / unspecified voltage

electronic expansion valve check

FTXS18DVJU

FTXS24DVJU