Daikin FTK25JV1NB, FTK35JV1NB, RK35JV1NB, FTX25JV1NB, FTX35JV1NB User Manual

...

SIE-86

Table of Contents i

Inverter Pair

FTK(X)-J / RK(X)-J Series

 Cooling Only

Indoor Unit

FTK25JV1NB FTK35JV1NB

Outdoor Unit

RK25JV1NB RK35JV1NB

 Heat Pump

Indoor Unit

FTX25JV1NB FTX35JV1NB

Outdoor Unit

RX25JV1NB RX35JV1NB

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SIE-86

ii Table of Contents

1. Introduction .............................................................................................v

1.1 Safety Cautions ....................................................................................... v

Part 1 List of Function .................................................................1

1. Functions.................................................................................................2

1.1 Indoor Unit and Outdoor Unit................................................................... 2

Part 2 Printed Circuit Board Connector Wiring Diagram .............3

1. Printed Circuit Board Connector Wiring Diagram and Name..................4

1.1 FTK25/35J Series, FTX25/35J Series..................................................... 4

1.2 RK25/35J Series, RX25/35J Series......................................................... 6

Part 3 Main Function.....................................................................9

1. General Functionality ............................................................................10

1.1 Functions of Thermistors....................................................................... 10

1.2 Operating Modes................................................................................... 12

1.3 Frequency Principle............................................................................... 13

1.4 Defrost Control ...................................................................................... 15

1.5 Forced Operation Mode......................................................................... 16

1.6 Wide-angle Flaps, Diffuser, Louvres and Autoswing............................. 17

1.7 Fan Speed Control for Indoor Units....................................................... 19

1.8 Fan Speed Control for Outdoor Units.................................................... 20

1.9 General Functions ................................................................................. 21

1.10 Intelligent Eye (J type)........................................................................... 23

1.11 Good Sleep Cooling Control (J Type).................................................... 25

1.12 Automatic Operation.............................................................................. 26

1.13 Input Current Control (H / J Type) ......................................................... 27

1.14 Freeze Protection Function in Cooling. (H / J Type).............................. 28

1.15 Peak-Cut Control Function (H / J Type) ................................................ 29

1.16 Four-Way Valve Function Compensation (H / J Type).......................... 30

1.17 Compressor Protection Function (H / J Type) ....................................... 31

1.18 Wet Operation Protection (H / J Type) .................................................. 32

1.19 Dew Condensation Sweating Prevention Function (H / J type)............. 33

Part 4 System Configuration.......................................................35

1. Instruction..............................................................................................36

1.1 FTK25 / 35J, FTX25 / 35J ..................................................................... 36

Part 5 Service Diagnosis.............................................................51

1. Caution for Diagnosis............................................................................52

1.1 Troubleshooting with The Operation Lamp ........................................... 52

2. Problem Symptoms and Measures.......................................................54

3. Service Check Function ........................................................................55

3.1 ARC423 Series...................................................................................... 55

4. Code Indication on The Remote Controller...........................................56

4.1 Error Codes and Description of Fault .................................................... 56

5. Troubleshooting ....................................................................................57

5.1 Indoor Units ........................................................................................... 57

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SIE-86

Table of Contents iii

5.2 Outdoor Units ........................................................................................ 58

5.3 Faulty PCB ............................................................................................ 59

5.4 Operation Shutdown Due to High-Pressure Control

or Freeze-Up Protection (Thermistor Activation).................................. 60

5.5 Operation Halt Due to Fan Motor (AC Motor) or Related Abnormality. . 61

5.6 Operation Halt Due to Detection of Thermistor or Related Abnormality 62

5.7 Faulty Indoor Unit PCB.......................................................................... 63

5.8 Faulty Indoor Unit PCB.......................................................................... 64

5.9 Power Supply Abnormalities or Faulty Indoor Printed Circuit Boards ... 65

5.10 Signal Transmission Error (Between Indoor and Outdoor Units) .......... 66

5.11 Operation Halt Due to Detection of CT Error......................................... 67

5.12 Operation Halt Due to Thermistor Error or Disconnection Detection..... 68

5.13 Operation Halt Due to Compressor Startup Error.................................. 69

5.14 Output Overcurrent................................................................................ 70

5.15 Faulty Outdoor Unit PCB....................................................................... 72

5.16 Faulty Outdoor Unit PCB and Transmitting/Receiving Circuit ............... 73

5.17 Operation Halt Due to Detection of Input Over Current......................... 74

6. Check....................................................................................................76

6.1 How to Check ........................................................................................ 76

Part 6 Removal Procedure ..........................................................85

1. For FTK25J, FTK35J, FTX25J, FTX35J ...............................................86

1.1 Removal of Air Filter.............................................................................. 86

1.2 Removal of Front Grille.......................................................................... 88

1.3 Removal of Horizontal Blade and Vertical Blade................................... 90

1.4 Removal of Switch Box, PC Board and Swing Motor............................ 92

1.5 Removal of Heat Exchanger.................................................................. 97

1.6 Install of Drain Plug ............................................................................... 99

1.7 Removal of Fan Rotor and Motor ........................................................ 100

2. For RK25J, RK35J, RX25J, RX35J.....................................................103

2.1 Removal of External Casing................................................................ 103

2.2 Removal of Bellmouth and Left Side Plate.......................................... 105

2.3 Removal of PC Board and Switch Box................................................ 106

2.4 Removal of Propeller Fan and Fan Motor ........................................... 111

2.5 Removal of Compressor Noise Absorption Pad.................................. 112

2.6 Removal of Partition Plate and Reactor. ............................................. 114

2.7 Removal of Four-way Valve. ............................................................... 116

2.8 Removal of Compressor...................................................................... 118

Part 7 Others .............................................................................119

1. Others .................................................................................................120

1.1 Explanation.......................................................................................... 120

Part 8 Appendix.........................................................................123

1. Piping Diagram....................................................................................124

1.1 Indoor Unit........................................................................................... 124

1.2 Outdoor Unit ........................................................................................ 125

2. Wiring Diagram ...................................................................................127

2.1 Indoor Unit........................................................................................... 127

2.2 Outdoor Unit ........................................................................................ 129

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SIE-86

iv Table of Contents

Index .............................................................................................i

Drawings & Flow Charts ...............................................................iii

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SIE-86 Introduction

1. Introduction

1.1 Safety Cautions

Cautions and Warnings

 Be sure to read the following safety cautions before conducting repair work. 

The caution items are classified into “ Warning ” and “ Caution ”. The “ Warning ” items are especially important since they can lead to death or serious injury if they are not followed closely. The “

Caution ” items can also lead to serious accidents under some conditions if they are not followed.

Therefore, be sure to observe all the safety caution items described below.



About the pictograms

This symbol indicates an item for which caution must be exercised.

The pictogram shows the item to which attention must be paid.

This symbol indicates a prohibited action.

The prohibited item or action is shown inside or near the symbol.

This symbol indicates an action that must be taken, or an instruction.

The instruction is shown inside or near the symbol.



After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer

1.1.1 Caution in Repair.

Warning

Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for a repair. Working on the equipment that is connected to a power supply can cause an electrical shook. If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits, do not touch any electrically charged sections of the equipment.

If the refrigerant gas discharges during the repair work, do not touch the discharging refrigerant gas. The refrigerant gas can cause frostbite.

When disconnecting the suction or discharge pipe of the compressor at the welded section, release the refrigerant gas completely at a well-ventilated place first. If there is a gas remaining inside the compressor, the refrigerant gas or refrigerating machine oil discharges when the pipe is disconnected, and it can cause injury.

If the refrigerant gas leaks during the repair work, ventilate the area. The refrigerant gas can generate toxic gases when it contacts flames.

The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit. Be sure to discharge the capacitor completely before conducting repair work. A charged capacitor can cause an electrical shock.

Do not start or stop the air conditioner operation by plugging or unplugging the power cable plug. Plugging or unplugging the power cable plug to operate the equipment can cause an electrical shock or fire.

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Introduction SIE-86

1.1.2 Cautions Regarding Products after Repair

Caution

Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock.

Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock.

Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.

Be sure to turn off the power switch and unplug the power cable when cleaning the equipment. The internal fan rotates at a high speed, and cause injury.

Do not tilt the unit when removing it. The water inside the unit can spill and wet the furniture and floor.

Be sure to check that the refrigerating cycle section has cooled down sufficiently before conducting repair work. Working on the unit when the refrigerating cycle section is hot can cause burns.

Use the welder in a well-ventilated place. Using the welder in an enclosed room can cause oxygen deficiency.

Warning

Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools can cause an electrical shock, excessive heat generation or fire.

When relocating the equipment, make sure that the new installation site has sufficient strength to withstand the weight of the equipment. If the installation site does not have sufficient strength and if the installation work is not conducted securely, the equipment can fall and cause injury.

Be sure to install the product correctly by using the provided standard installation frame. Incorrect use of the installation frame and improper installation can cause the equipment to fall, resulting in injury.

For integral units only

Be sure to install the product securely in the installation frame mounted on a window frame. If the unit is not securely mounted, it can fall and cause injury.

For integral units only

Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to the electrical equipment, the internal wiring regulations and the instruction manual for installation when conducting electrical work. Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire.

Be sure to use the specified cable to connect between the indoor and outdoor units. Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals. Improper connections can cause excessive heat generation or fire.

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SIE-86 Introduction

vii

1.1.3 Inspection after Repair

When connecting the cable between the indoor and outdoor units, make sure that the terminal cover does not lift off or dismount because of the cable. If the cover is not mounted properly, the terminal connection section can cause an electrical shock, excessive heat generation or fire.

Do not damage or modify the power cable. Damaged or modified power cable can cause an electrical shock or fire. Placing heavy items on the power cable, and heating or pulling the power cable can damage the cable.

Do not mix air or gas other than the specified refrigerant (R22) in the refrigerant system. If air enters the refrigerating system, an excessively high pressure results, causing equipment damage and injury.

If the refrigerant gas leaks, be sure to locate the leak and repair it before charging the refrigerant. After charging refrigerant, make sure that there is no refrigerant leak. If the leak cannot be located and the repair work must be stopped, be sure to perform pump-down and close the service valve, to prevent the refrigerant gas from leaking into the room. The refrigerant gas itself is harmless, but it can generate toxic gases when it contacts flames, such as fan and other heaters, stoves and ranges.

When replacing the coin battery in the remote controller, be sure to disposed of the old battery to prevent children from swallowing it. If a child swallows the coin battery, see a doctor immediately.

Warning

Caution

Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site, to prevent electrical shocks.

Do not install the equipment in a place where there is a possibility of combustible gas leaks. If a combustible gas leaks and remains around the unit, it can cause a fire.

Be sure to install the packing and seal on the installation frame properly. If the packing and seal are not installed properly, water can enter the room and wet the furniture and floor.

For integral units only

Warning

Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet all the way. If the plug has dust or loose connection, it can cause an electrical shock or fire.

If the power cable and lead wires have scratches or deteriorated, be sure to replace them. Damaged cable and wires can cause an electrical shock, excessive heat generation or fire.

Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances, since it can cause an electrical shock, excessive heat generation or fire.

Caution

Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure. Improper installation and connections can cause excessive heat generation, fire or an electrical shock.

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Introduction SIE-86

viii

1.1.4 Using Icons

Icons are used to attract the attention of the reader to specific information. The meaning of each icon is described in the table below:

1.1.5 Using Icons List

If the installation platform or frame has corroded, replace it. Corroded installation platform or frame can cause the unit to fall, resulting in injury.

Check the grounding, and repair it if the equipment is not properly grounded. Improper grounding can cause an electrical shock.

Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 Mohm or higher. Faulty insulation can cause an electrical shock.

Be sure to check the drainage of the indoor unit after the repair. Faulty drainage can cause the water to enter the room and wet the furniture and floor.

Caution

Icon Type of

Information

Description

Note:

Note A “note” provides information that is not indispensable, but may

nevertheless be valuable to the reader, such as tips and tricks.

Caution

Caution A “caution” is used when there is danger that the reader, through

incorrect manipulation, may damage equipment, loose data, get an unexpected result or has to restart (part of) a procedure.

Warning

Warning A “warning” is used when there is danger of personal injury.

Reference A “reference” guides the reader to other places in this binder or in this

manual, where he/she will find additional information on a specific topic.

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SIE-86

List of Function 1

Part 1

List of Function

1. Functions.................................................................................................2

1.1 Indoor Unit and Outdoor Unit................................................................... 2

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Functions SIE-86

2 List of Function

1. Functions

1.1 Indoor Unit and Outdoor Unit

Category Functions

FTK25·35J Series

RK25·35J Series

FTX25·35J Series

RX25·35J Series

Category Functions

FTK25·35J Series

RK25·35J Series

FTX25·35J Series

RX25·35J Series

Basic Funtion

Energy Saving 

Health Health & Clean

Air Purifying Filter with Bacteriostatic, Virustatic & Deodrizing Functions



Inverter (with Inverter Power Control) 

Longlife Filter — —

Lower Limit of Outdoor Temperature for Cooling Operation Limit : Outdoor Temp. ˚C

10˚C 10˚C Ultra-Longlife Filter (Option) — —

Microprocessor Control 

Photocatalytic Deodrizing Filter — —

PAM Control (Pulse Amplitude Modulation Control)

— — Photocatalytic Filter with UV Lamp — —

Compressor

Horizontal Scroll, Oval Scroll Compressor (DAIKIN SCROLL)

— — Mold Proof Air Filter 

Swing Compressor (DAIKIN ROTARY) — — Washable Grille  Rotary Compressor 

Filter Cleaning Indicator — —

Reluctance DC Motor — — Healthy Cooling Operation — —

Comfortable Airflow

Dual Flaps 

Good-Sleep Cooling Operation 

Power-Airflow Dual Flaps 

Timer

72-Hour On/Off Timer — —

Power-Airflow Flap 5 Step Control 

24-Hour On/Off Timer  Power-Airflow Diffuser — — 12-Hour Timer — — Wide-Angle Louvers 

Night Set Mode  Vertical Auto-Swing (Up and Down) 

Just Fit Thermostatic Timer — — Horizontal Auto-Swing (Right and Left) — —

Worry Free “Reliability & Durability”

Auto-Restart (after Power Failure)  3-Step Airflow (H/P Only) — — Self-Diagnosis Digital Display 

“Comfortable Control” Comfort Control

Auto Fan Speed 

Self-Diagnosis LED Display — — Silent-Operation Control — — LCD Remote Controller (Option) — —

Double Thermostat Function — —

The Remote Controller Loss Prevention

with the Chain (Option)



Intelligent Eye 

Wiring Error Check — —

Automatic Sensible Comfort Control 

Anticorrosion Treatment of Outdoor

Hear Exchanger



Quick Warming Function — 

Flexibility

Multi-Split / Split Type Compatible

Indoor Unit



Hot-Start Function — 

Flexible Voltage Correspondence  Automatic Defrosting — 

Chargeless  —

Operation

Automatic Operation — 

Remote Control

5-Rooms Centralized Controller

(Option)



Programme Dry Function 

Field-Supply Timer Operation 

Height-Ceiling Application — —

Remote Control Adaptor (Option)

(Normal Open-Pluse Contact)



Circulation — —

Remote Control Adaptor (Normal Open

Contact)



Fan Only  — DIII-NET Compatible (Adaptor) 

Lifestyle Convenience

New Powerful Operation (Non-Inverter) — —

Remote Controller

Wireless  Inverter Powerful Operation (Increased

Air Volume / Increased Compressor Rotation Speed)



Wired — —

Priority-Room Setting — — Quiet Operation — — Laundry Programme Operation — — Energy-Saving Operation — — Power Selection — — Indoor Unit On/Off Switch  Signal Reception Indicator  Temperature Display — — Power-Control Function — —



: Holding Functions — : No Functions

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SIE-86

Printed Circuit Board Connector Wiring Diagram 3

Part 2

Printed Circuit Board

Connector Wiring Diagram

1. Printed Circuit Board Connector Wiring Diagram and Name..................4

1.1 FTK25/35J Series, FTX25/35J Series..................................................... 4

1.2 RK25/35J Series, RX25/35J Series......................................................... 6

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Printed Circuit Board Connector Wiring Diagram and Name SIE-86

4 Printed Circuit Board Connector Wiring Diagram

1. Printed Circuit Board Connector Wiring Diagram and Name

1.1 FTK25/35J Series, FTX25/35J Series

Printed circuit board (1) (Control PCB) Printed circuit board (2) (Signal Receiver PCB) Printed circuit board (3) (Intelligent Eye Sensor PCB)

Name of connector

Note: Other designations

Control PCB (1)

1) S1 Connector for fan motor

2) S6 Connector for swing motor (Horizontal Flap)

3) S7 Connector for fan motor

4) S21 Connector for centralized control to 5 rooms

5) S27, S36 Connector for control PCB

6) S26 Connector for signal receiver PCB

7) S32 Connector for room temp/Heat exchanger thermistor

8) S35 Connector for Intelligent Eye Sensor PCB

1) V1 Varistor

2) JA ADDRESS SETTING JAMPER JB Fan speed setting when compressor is OFF on thermostat. JC Power failure recovery function. ∗ Refer to page 121 for more detail.

3) SW7 OPERATION SWITCH

4) LED1 (GRN) LED for operation

5) LED2 (YLW) LED for timer

6) LED3 (GRN) LED for intelligent eye

(RL001)

Control P C B (1)

Signal receive P C B (2)

S27

GRN

YLW

LED1 LED2 LED3

SW7

Intelligent eye sensor P C B (3)

S36

S35

S26

S32

S21

5V check Jamper

JA JB JC

ground

12V check Jamper

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SIE-86 Printed Circuit Board Connector Wiring Diagram and Name

Printed Circuit Board Connector Wiring Diagram 5

P.C.B (1) (Control P.C.B) Detail

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Printed Circuit Board Connector Wiring Diagram and Name SIE-86

6 Printed Circuit Board Connector Wiring Diagram

1.2 RK25/35J Series, RX25/35J Series

Printed circuit board (1) (Main-PCB)

Name of connector

PCB (1)

1) S30 Connector for compressor motor (with internal thermostat)

2) S70 Connector for fan motor

3) S80 Connector for 4 WAY VALVE COIL (RX25 · 35J Series only)

4) S91 Connector for THERMISTOR

5) S40 Connector for OL

6) SW1 NONE (Forced operation ON/OFF switch)

7) SW2 NONE (Forced operation Mode selector switch (H/P only))

S30

S70

Service Monitor

S40 S80

S91

S(SIGNAL)

L(LIVE)

N(NEUTRAL)

(RL002)

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SIE-86 Printed Circuit Board Connector Wiring Diagram and Name

Printed Circuit Board Connector Wiring Diagram 7

P.C.B (1) (Control P.C.B) Detail

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Printed Circuit Board Connector Wiring Diagram and Name SIE-86

8 Printed Circuit Board Connector Wiring Diagram

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SIE-86

Main Function 9

Part 3

Main Function