Daikin FTXN18KVJU Service Manual

Service
Manual
Inverter Pair
Wall Mounted Type K-Series
SiUS041111
[Applied Models]
 Inverter Pair : Cooling Only
 Inverter Pair : Heat Pump

Daikin FTXN18KVJU Specifications

General

Refrigerant	R-410A
Voltage	220-240V
Type	Split System
Cooling Capacity	18, 000 BTU/h
Energy Efficiency Ratio (Cooling)	3.50
Energy Efficiency Ratio (Heating)	3.80
Power Supply	1-phase, 50 Hz
Indoor Unit Weight	9 kg
Outdoor Unit Weight	38 kg

Summary

Part 1 List of Functions

1. Functions

Lists all functions of the air conditioner, categorized by type, specifying model compatibility.

Part 2 Specifications

1. Specifications

Provides detailed technical specifications including capacity, power, and dimensions for models.

Part 3 Printed Circuit Board Connector Wiring Diagram

1. Indoor Unit

Details PCB connectors and parts for indoor units, divided by class (09/12 and 15/18/24).

2. Outdoor Unit

Details PCB connectors and parts for outdoor units, divided by class (09/12 and 15/18/24).

Part 4 Function and Control

1. Main Functions

Explains core operational functions like temperature control, frequency principle, and airflow.

2. Function of Thermistor

Describes the role and function of various thermistors in the system's operation.

3. Control Specification

Details control specifications including mode hierarchy and frequency control.

Part 5 Operation Manual

1. System Configuration

Provides an overview of handling and operating the unit after installation.

2. 09/12 Class

Covers operation details specific to the 09/12 class indoor units.

3. 15/18/24 Class

Covers operation details specific to the 15/18/24 class indoor units.

Part 6 Service Diagnosis

1. Troubleshooting with LED

Explains how to diagnose issues using the operation lamp and service monitor LEDs.

2. Problem Symptoms and Measures

Lists common unit problems and their corresponding troubleshooting measures.

3. Service Check Function

Explains how to access and use the service check function via the remote controller.

4. Troubleshooting

Provides detailed troubleshooting steps for various error codes and malfunctions.

Part 7 Removal Procedure

1. Indoor Unit: 09/12 Class

Provides step-by-step instructions for removing components of the 09/12 class indoor unit.

2. Indoor Unit: 15/18/24 Class

Provides step-by-step instructions for removing components of the 15/18/24 class indoor unit.

3. Outdoor Unit: 09/12 Class

Details the removal of components from the 09/12 class outdoor unit.

4. Outdoor Unit: 15/18/24 Class

Details the removal of components from the 15/18/24 class outdoor unit.

Part 8 Trial Operation and Field Settings

1. Pump Down Operation

Explains the procedure for pump down operation for relocation or disposal.

2. Forced Cooling Operation

Details the conditions and procedure for forced cooling operation.

3. Trial Operation

Guides on performing trial operation to ensure all functions work correctly.

4. Field Settings

Covers model type setting, temperature display switch, and other field settings.

Part 9 Appendix

1. Piping Diagrams

Shows piping diagrams for indoor and outdoor units.

2. Wiring Diagrams

Provides wiring diagrams for indoor and outdoor units.