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Daikin Manuals
Air Conditioner
FTKS25D3VMW
Service manual
Daikin FTKS25D3VMW Service Manual
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Service manual
(228 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Introduction
Safety Cautions
Used Icons
Part 1 List of Functions
List of Functions
Cooling Only Models
Heat Pump Models
Part 2 Specifications
Indoor Units - Cooling Only
Outdoor Units - Cooling Only
Indoor Units - Heat Pump
Outdoor Units - Heat Pump
Part 3 Printed Circuit Board Connector Wiring Diagram
Printed Circuit Board Connector Wiring Diagram
Wall Mounted Type
Duct Connected Type
Floor / Ceiling Suspended Dual Type
Floor Standing Type
Ceiling Suspended Type
Outdoor Units
Part 4 Function and Control
Main Functions
Frequency Principle
Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing
Operation Starting Control
Fan Speed Control for Indoor Units
Programme Dry Function
Automatic Operation
Thermostat Control
Night Set Mode
ECONO Mode
INTELLIGENT EYE (Wall Mounted Type Only)
HOME LEAVE Operation
Inverter POWERFUL Operation
Other Functions
Function of Main Structural Parts
Main Structural Parts
Function of Thermistor
Control Specification
Mode Hierarchy
Frequency Control
Controls at Mode Changing / Start-Up
Compressor Protection Function
Discharge Pipe Control
Input Current Control
Freeze-Up Protection Control
Heating Peak-Cut Control
Fan Control
Liquid Compression Protection Function 2
Defrost Control
Electronic Expansion Valve Control
Malfunctions
Forced Operation Mode
Wiring-Error Check
Additional Function
Part 5 Operation Manual
System Configuration
Operation Instructions
Instruction
FTK(X)S, FTXG, CTXG, FDK(X)S, FLK(X)S Series
Safety Precautions
FVXS Series
Air Flow Selection
FHQ Series
Temperature Setting
Fan Speed Control
Part 6 Service Diagnosis
Caution for Diagnosis
Troubleshooting with Operation Lamp
Problem Symptoms and Measures
Service Check Function
Check Method 1
Check Method 2
Code Indication on the Remote Control
Error Codes and Description of Fault
Troubleshooting
Indoor Units
Outdoor Units
Indoor Unit PCB Abnormality
Freeze-Up Protection Control or High Pressure Control
Fan Motor or Related Abnormality
Thermistor or Related Abnormality (Indoor Unit)
Front Panel Open / Close Fault
Signal Transmission Error (between Indoor and Outdoor Unit)
Unspecified Voltage (between Indoor and Outdoor Units)
Freeze-Up Protection Control
Outdoor Unit PCB Abnormality
OL Activation (Compressor Overload)
Compressor Lock
DC Fan Lock
Input over Current Detection
Discharge Pipe Temperature Control
High Pressure Control in Cooling
Compressor Sensor System Abnormality
Position Sensor Abnormality
CT or Related Abnormality
Thermistor or Related Abnormality (Outdoor Unit)
Sienbe12
Electrical Box Temperature Rise
Radiation Fin Temperature Rise
Output over Current Detection
Insufficient Gas
Low-Voltage Detection or Over-Voltage Detection
Signal Transmission Error (on Outdoor Unit PCB)
Anti-Icing Function in Other Rooms / Unspecified Voltage
(Between Indoor and Outdoor Units)
Anti-Icing Function in Other Rooms / Unspecified Voltage (between Indoor and Outdoor Units)
Check
How to Check
Electronic Expansion Valve Check
Four Way Valve Performance Check
Installation Condition Check
Discharge Pressure Check
Power Supply Waveforms Check
Capacitor Voltage Check
Power Transistor Check
Main Circuit Electrolytic Capacitor Check
Hall IC Check
Part 7 Removal Procedure
Outdoor Unit
Removal of the Panels and Plates
Removal of the Electrical Box
Removal of the PCB
Removal of the Propeller Fan / Fan Motor
Removal of the Sound Blanket
Removal of Electronic Expansion Valve Coil, Four Way Valve Coil and Thermistor
Removal of the Distributor
Removal of the Four Way Valve
Removal of the Compressor
Part 8 Others
Others
Test Run from the Remote Control
Jumper Settings
Part 9 Appendix
Piping Diagrams
Indoor Units
Outdoor Units
Wiring Diagrams
Indoor Units
Outdoor Units
Index
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Quick Links
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Indoor Units - Cooling Only
2
Indoor Units - Heat Pump
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Service
Manual
F-Series
[Applied Models]
! Inverter pair Cooling mode
! Inverter pair Heating mode
SiENBE12-713
Table of
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Table of Contents
Troubleshooting
Caution for Diagnosis
237
Troubleshooting
245
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Summarization of Contents
Part 1 List of Functions
1. List of Functions
Overview of functions available for different Daikin air conditioner models.
Part 2 Specifications
1. Specifications
Detailed technical specifications for indoor and outdoor units across various series.
Part 3 Printed Circuit Board Connector Wiring Diagram
1. Printed Circuit Board Connector Wiring Diagram
Wiring diagrams for PCB connectors of various indoor and outdoor unit types.
Part 4 Function and Control
1. Main Functions
Description of primary operational functions like frequency control, airflow, and modes.
2. Function of Main Structural Parts
Explanation of the roles of key structural components like thermistors and valves.
3. Control Specification
Specifications detailing system control logic, mode hierarchy, and frequency management.
Part 5 Operation Manual
1. System Configuration
Information on system setup, installation, and initial operation instructions for users.
2. Instruction
Guidance on operating specific Daikin air conditioner series like FTK, FTXG, etc.
Part 6 Service Diagnosis
1. Caution for Diagnosis
Important cautions and safety guidelines to follow before performing diagnosis.
2. Problem Symptoms and Measures
Common operational problems and their corresponding recommended measures for resolution.
3. Service Check Function
Procedures for checking system functions and diagnosing issues using specific methods.
4. Code Indication on the Remote Control
List of error codes displayed on the remote control and their associated fault descriptions.
5. Troubleshooting
Detailed troubleshooting steps for various specific faults and abnormalities.
6. Check
Procedures for checking specific components and system conditions for fault diagnosis.
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