Daikin FTXN25KEV1B, FTXN35KEV1B, RXN35KEV1B, RXN25KEV1B Service Manual

Service

Manual

Inverter Pair

Wall Mounted Type K-Series

SiBE041102_A

[Applied Models]

Inverter Pair : Heat Pump

SiBE041102_A

i Table of Contents

Inverter Pair

Wall Mounted Type

K-Series

zHeat Pump

Indoor Unit FTXN25KEV1B FTXN35KEV1B

Outdoor Unit RXN25KEV1B RXN35KEV1B

SiBE041102_A

Table of Contents ii

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

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

1.2 Used Icons .............................................................................................. ix

Part 1 List of Functions ................................................................1

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

Part 2 Specifications .................................................................... 3

1. Specifications..........................................................................................4

Part 3 Printed Circuit Board Connector Wiring Diagram ............. 5

1. Indoor Unit...............................................................................................6

2. Outdoor Unit............................................................................................8

Part 4 Function and Control.......................................................... 9

1. Main Functions......................................................................................10

1.1 Temperature Control ..............................................................................10

1.2 Frequency Principle................................................................................10

1.3 Airflow Direction Control.........................................................................12

1.4 Fan Speed Control for Indoor Unit .........................................................13

1.5 Program Dry Operation ..........................................................................14

1.6 Automatic Operation...............................................................................15

1.7 Thermostat Control.................................................................................16

1.8 NIGHT SET Mode ..................................................................................17

1.9 ECONO Operation .................................................................................18

1.10 Inverter POWERFUL Operation .............................................................19

1.11 Other Functions......................................................................................20

2. Function of Thermistor ..........................................................................21

3. Control Specification .............................................................................22

3.1 Mode Hierarchy ......................................................................................22

3.2 Frequency Control..................................................................................23

3.3 Controls at Mode Changing / Start-up....................................................25

3.4 Discharge Pipe Temperature Control.....................................................26

3.5 Input Current Control ..............................................................................27

3.6 Freeze-up Protection Control .................................................................28

3.7 Heating Peak-cut Control .......................................................................28

3.8 Outdoor Fan Control...............................................................................29

3.9 Liquid Compression Protection Function................................................29

3.10 Defrost Control .......................................................................................30

3.11 Electronic Expansion Valve Control .......................................................31

3.12 Malfunctions ...........................................................................................34

Part 5 Operation Manual ............................................................. 35

1. System Configuration............................................................................36

2. Operation Manual..................................................................................37

2.1 Remote Controller ..................................................................................37

2.2 AUTO · DRY · COOL · HEAT · FAN Operation ......................................38

2.3 Adjusting the Airflow Direction................................................................40

SiBE041102_A

iii Table of Contents

2.4 COMFORT AIRFLOW Operation ...........................................................42

2.5 POWERFUL Operation ..........................................................................43

2.6 ECONO Operation .................................................................................44

2.7 OFF TIMER Operation ...........................................................................45

2.8 ON TIMER Operation .............................................................................46

Part 6 Service Diagnosis.............................................................47

1. Troubleshooting with LED.....................................................................48

1.1 Indoor Unit..............................................................................................48

1.2 Outdoor Unit ...........................................................................................48

2. Problem Symptoms and Measures.......................................................49

3. Service Check Function ........................................................................50

4. Troubleshooting ....................................................................................53

4.1 Error Codes and Description ..................................................................53

4.2 Indoor Unit PCB Abnormality .................................................................54

4.3 Freeze-up Protection Control or Heating Peak-cut Control....................55

4.4 Fan Motor (AC Motor) or Related Abnormality.......................................57

4.5 Thermistor or Related Abnormality (Indoor Unit)....................................59

4.6 Signal Transmission Error (between Indoor Unit and Outdoor Unit)......60

4.7 Unspecified Voltage (between Indoor Unit and Outdoor Unit) ...............62

4.8 Outdoor Unit PCB Abnormality...............................................................63

4.9 OL Activation (Compressor Overload) ...................................................64

4.10 Compressor Lock ...................................................................................65

4.11 Input Overcurrent Detection ...................................................................66

4.12 Four Way Valve Abnormality..................................................................67

4.13 Discharge Pipe Temperature Control.....................................................69

4.14 High Pressure Control in Cooling ...........................................................70

4.15 Compressor System Sensor Abnormality ..............................................71

4.16 Position Sensor Abnormality ..................................................................72

4.17 DC Voltage / Current Sensor Abnormality..............................................74

4.18 Thermistor or Related Abnormality (Outdoor Unit) .................................75

4.19 Electrical Box Temperature Rise ............................................................77

4.20 Radiation Fin Temperature Rise ............................................................79

4.21 Output Overcurrent Detection ................................................................81

4.22 Refrigerant Shortage ..............................................................................83

4.23 Low-voltage Detection or Over-voltage Detection..................................85

5. Check ....................................................................................................87

5.1 Thermistor Resistance Check ................................................................87

5.2 Hall IC Check .........................................................................................88

5.3 Power Supply Waveforms Check...........................................................88

5.4 Electronic Expansion Valve Check.........................................................89

5.5 Four Way Valve Performance Check .....................................................90

5.6 Inverter Unit Refrigerant System Check.................................................90

5.7 “Inverter Checker” Check .......................................................................91

5.8 Installation Condition Check ...................................................................92

5.9 Discharge Pressure Check.....................................................................93

5.10 Outdoor Fan System Check ...................................................................93

5.11 Main Circuit Short Check........................................................................94

5.12 Power Module Check .............................................................................94

SiBE041102_A

Table of Contents iv

Part 7 Removal Procedure .......................................................... 95

1. Indoor Unit.............................................................................................96

1.1 Removal of Air Filters .............................................................................96

1.2 Removal of Horizontal Blade..................................................................98

1.3 Removal of Front Panel........................................................................100

1.4 Removal of Front Grille ........................................................................101

1.5 Removal of Electrical Box / Vertical Blades .........................................102

1.6 Removal of Swing Motor / PCBs ..........................................................107

1.7 Removal of Indoor Heat Exchanger .....................................................111

1.8 Removal of Fan Rotor / Fan Motor.......................................................114

1.9 Exchange of Drain Hose (Piping Direction) ..........................................117

2. Outdoor Unit........................................................................................118

2.1 Removal of Outer Panels .....................................................................118

2.2 Removal of Outdoor Fan / Fan Motor...................................................120

2.3 Removal of Electrical Box / PCB ..........................................................122

2.4 Removal of Sound Blankets .................................................................130

2.5 Removal of Four Way Valve.................................................................132

2.6 Removal of Compressor.......................................................................135

Part 8 Trial Operation and Field Settings.................................136

1. Pump Down Operation........................................................................137

2. Forced Cooling Operation...................................................................138

3. Trial Operation ....................................................................................139

4. Field Settings ......................................................................................140

4.1 When 2 Units are Installed in 1 Room ..................................................140

4.2 Jumper Settings ...................................................................................140

5. Application of Silicon Grease to a Power Transistor and

a Diode Bridge ....................................................................................141

Part 9 Appendix......................................................................... 142

1. Piping Diagrams..................................................................................143

1.1 Indoor Unit............................................................................................143

1.2 Outdoor Unit .........................................................................................144

2. Wiring Diagrams..................................................................................145

2.1 Indoor Unit............................................................................................145

2.2 Outdoor Unit .........................................................................................146

Introduction SiBE041102_A

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 the item for which caution must be exercised.

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

This symbol indicates the prohibited action.

The prohibited item or action is shown in the illustration or near the symbol.

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

The instruction is shown in the illustration 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 Cautions Regarding Safety of Workers

Warning

Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for repair. Working on the equipment that is connected to the power supply may cause an electrical shock. 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 is discharged during the repair work, do not touch the discharged refrigerant gas. The refrigerant gas may cause frostbite.

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

If the refrigerant gas leaks during the repair work, ventilate the area. The refrigerant gas may 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 may 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 may cause an electrical shock or fire.

SiBE041102_A Introduction

Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m). Insufficient safety measures may cause a fall accident.

In case of R-410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R-410A refrigerant. The use of materials for R-22 refrigerant models may cause a serious accident such as a damage of refrigerant cycle as well as an equipment failure.

Warning

Caution

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

Do not clean the air conditioner by splashing water. Washing the unit with water may 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 may cause injury.

Be sure to conduct repair work with appropriate tools. The use of inappropriate tools may cause injury.

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

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

Introduction SiBE041102_A

vii

1.1.2 Cautions Regarding Safety of Users

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 may cause an electrical shock, excessive heat generation or fire.

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

Be sure to use an exclusive power circuit for the equipment, and follow the local 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 may cause an electrical shock or fire.

Be sure to use the specified cable for wiring 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 may cause excessive heat generation or fire.

When wiring 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 may cause an electrical shock, excessive heat generation or fire.

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

Do not mix air or gas other than the specified refrigerant (R-410A / R-22) 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 leaking point and repair it before charging the refrigerant. After charging refrigerant, make sure that there is no refrigerant leak. If the leaking point 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 may generate toxic gases when it contacts flames, such as fan and other heaters, stoves and ranges.

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 may fall and cause injury.

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

SiBE041102_A Introduction

viii

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

For unitary type only

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

For unitary type only

When replacing the coin battery in the remote controller, be sure to dispose 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 the combustible gas leaks and remains around the unit, it may cause a fire.

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 may cause excessive heat generation, fire or an electrical shock.

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

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

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

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

Introduction SiBE041102_A

1.2 Used 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:

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

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

For unitary type only

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.

SiBE041102_A

List of Functions 1

Part 1

List of Functions

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

Functions SiBE041102_A

2 List of Functions

1. Functions

Category Functions

FTXN25/35KEV1B

RXN25/35KEV1B

Category Functions

FTXN25/35KEV1B

RXN25/35KEV1B

Basic Function

Inverter (with Inverter Power Control)

Health & Clean

Air-Purifying Filter —

Operation Limit for Cooling (°CDB)

~ 46

Photocatalytic Deodorizing Filter —

Operation Limit for Heating (°CWB)

–

~ 18

Air-Purifying Filter with Photocatalytic Deodorizing Function

—

PAM Control

Titanium Apatite Photocatalytic Air-Purifying Filter

Standby Electricity Saving

Compressor Oval Scroll Compressor — Air Filter (Prefilter)

Swing Compressor

Wipe-Clean Flat Panel

Rotary Compressor — Washable Grille —

Reluctance DC Motor

MOLD PROOF Operation —

Comfortable Airflow

Power-Airflow Flap

Heating Dry Operation —

Power-Airflow Dual Flaps — Good-Sleep Cooling Operation —

Power-Airflow Diffuser —

Timer 24-Hour ON/OFF TIMER —

Count Up-Down ON/OFF TIMER

Wide-Angle Louvers

NIGHT SET Mode

Vertical Auto-Swing (Up and Down)

Worry Free “Reliability & Durability”

Auto-Restart (after Power Failure)

Horizontal Auto-Swing (Right and Left) — Self-Diagnosis (Digital, LED) Display

3-D Airflow — Wiring Error Check Function —

COMFORT AIRFLOW Operation

Anti-Corrosion Treatment of Outdoor Heat Exchanger

Comfort Control

Auto Fan Speed

Flexibility

Multi-Split / Split Type Compatible Indoor Unit —

Indoor Unit Quiet Operation

NIGHT QUIET Mode (Automatic) —

Flexible Power Supply Correspondence —

OUTDOOR UNIT QUIET Operation (Manual) —

INTELLIGENT EYE Operation — Chargeless 10 m

Quick Warming Function (Preheating operation)

Either Side Drain (Right or Left)

Hot-Start Function

Power Selection —

Automatic Defrosting

Remote Control

5-Room Centralized Controller (Option) —

Operation Automatic Operation

Program Dry Operation

Remote Control Adaptor (Normal Open Pulse Contact) (Option)

—

Fan Only

Lifestyle Convenience

New POWERFUL Operation (Non-Inverter) —

Remote Control Adaptor (Normal Open Contact) (Option)

—

Inverter POWERFUL Operation

DIII-NET Compatible (Adaptor) (Option) —

Priority-Room Setting — Remote

Controller

Wireless

COOL / HEAT Mode Lock — Wired (Option)

HOME LEAVE Operation —

ECONO Operation

Indoor Unit ON/OFF Button

Signal Receiving Sign

Temperature Display —

Note: z

: Holding Functions

— : No Functions

SiBE041102_A

Specifications 3

Part 2

Specifications

1. Specifications..........................................................................................4

Specifications SiBE041102_A

4 Specifications

1. Specifications

50 Hz, 220 - 230 - 240 V

Note:



The data are based on the conditions shown in the table below.

Model

Indoor Unit FTXN25KEV1B FTXN35KEV1B

Outdoor Unit

RXN25KEV1B RXN35KEV1B

Cooling Heating Cooling Heating

Capacity Rated (Min. ~ Max.)

kW 2.5 (1.3 ~ 2.8) 2.8 (1.3 ~ 3.5) 3.2 (1.3 ~ 3.5) 3.5 (1.3 ~ 3.7)

Btu/h 8,500 (4,400 ~ 9,600) 9,600 (4,400 ~ 11,900) 10,900 (4,400 - 11,900) 11,900 (4,400 ~ 12,600)

kcal/h 2,150 (1,120 ~ 2,410) 2,410 (1,120 ~ 3,010) 2,750 (1,120 ~ 3,010) 3,010 (1,120 ~ 3,180)

Moisture Removal L/h 1.2

—

1.7

—

Running Current (Rated) A 3.8 - 3.6 - 3.5 3.9 - 3.7 - 3.5 4.9 - 4.7 - 4.5 4.7 - 4.5 - 4.3 Power Consumption

Rated (Min. ~ Max.)

W 795 (310 ~ 1,040) 820 (260 ~ 1,030) 1,060 (310 ~ 1,480) 1,020 (260 ~ 1,200)

Power Factor (Rated) % 95.1 - 96.0 - 94.6 95.6 - 96.4 - 97.6 98.3 - 98.1 - 98.1 98.6 - 98.6 - 98.8 COP

Rated (Min. ~ Max.)

W/W 3.13 (4.19 ~ 2.69) 3.41 (5.00 ~ 3.40) 3.02 (4.19 ~ 2.36) 3.43 (5.00 ~ 3.08)

Piping Connections

Liquid mm

6.4

Gas mm

9.5

Drain mm

16.0

16.0 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Max. Interunit Piping Length m 15 15 Max. Interunit Height Difference m 12 12 Chargeless m 10 10 Amount of Additional Charge of

Refrigerant

g/m 20 20

Indoor Unit FTXN25KEV1B FTXN35KEV1B

Front Panel Color White White

Airflow Rate

m³/min

(cfm)

9.2 (325) 9.8 (346) 9.6 (339) 10.1 (357) M 6.9 (244) 7.9 (279) 7.5 (265) 8.3 (293) L 4.6 (162) 6.0 (212) 5.6 (198) 6.4 (226) SL 3.9 (138) 5.3 (187) 4.5 (159) 5.7 (201)

Fan

Type Cross Flow Fan Cross Flow Fan Motor Output W 15 15 Speed Steps 5 Steps, Quiet, Auto 5 Steps, Quiet, Auto

Air Direction Control Right, Left, Horizontal, Downward Right, Left, Horizontal, Downward Air Filter Removable / Washable / Mildew Proof Removable / Washable / Mildew Proof Running Current (Rated) A 0.15 - 0.15 - 0.16 0.15 - 0.15 - 0.16 0.15 - 0.15 - 0.16 0.15 - 0.15 - 0.16 Power Consumption (Rated) W 29 29 29 29 Power Factor (Rated) % 84.8 - 84.1 - 75.5 84.8 - 84.1 - 75.5 84.8 - 84.1 - 75.5 84.8 - 84.1 - 75.5 Temperature Control Microcomputer Control Microcomputer Control Dimensions (H × W × D) mm 283 × 770 × 198 283 × 770 × 198 Packaged Dimensions (H × W × D) mm 261 × 844 × 342 261 × 844 × 342 Weigh t kg 8 8 Gross Weight kg 11 11 Sound

Pressure Level

H / M / L / SL dB(A) 40 / 33 / 26 / 22 40 / 34 / 28 / 25 41 / 34 / 27 / 23 41 / 35 / 29 / 26

Sound Power Level dB 56 56 57 57

Outdoor Unit RXN25KEV1B RXN35KEV1B

Casing Color Ivory White Ivory White

Compressor

Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Model 1YC23AJXD 1YC23AJXD Motor Output W 600 600

Refrigerant Oil

Type FVC50K FVC50K Charge L 0.375 0.375

Refrigerant

Type R-410A R-410A Charge kg 0.74 0.95

Airflow Rate H

m³/min

(cfm)

28.8 (1,017) 28.8 (1,017) 28.8 (1,017) 28.8 (1,017)

Fan

Type Propeller Propeller Motor Output W 20 20

Running Current (Rated) A 3.65 - 3.45 - 3.34 3.75 - 3.55 - 3.34 4.75 - 4.55 - 4.34 4.55 - 4.35 - 4.14 Power Consumption (Rated) W 766 791 1,031 991 Power Factor (Rated) % 95.4 - 96.5 - 95.6 95.9 - 96.9 - 98.7 98.7 - 98.5 - 99.0 99.0 - 99.1 - 99.7 Starting Current A 3.9 4.9 Dimensions (H × W × D) mm 550 × 658 × 275 550 × 658 × 275 Packaged Dimensions (H × W × D) mm 592 × 771 × 348 592 × 771 × 348 Weight kg 26 28 Gross Weight kg 30 32 Sound Pressure Level dB(A) 47 48 49 50 Sound Power Level dB 61 62 63 64 Drawing No. 3D071262 3D071263

Conversion Formulae

kcal/h = kW × 860

Btu/h = kW × 3412

cfm = m³/min × 35.3

Cooling Heating Piping Length

Indoor ; 27°CDB / 19°CWB

Outdoor ; 35°CDB / 24°CWB

Indoor ; 20°CDB

Outdoor ; 7°CDB / 6°CWB

5 m

SiBE041102_A

Printed Circuit Board Connector Wiring Diagram 5

Part 3

Printed Circuit Board

Connector Wiring Diagram

1. Indoor Unit...............................................................................................6

2. Outdoor Unit............................................................................................8

Indoor Unit SiBE041102_A

6 Printed Circuit Board Connector Wiring Diagram

1. Indoor Unit

Connectors and Other Parts

PCB (1): Control PCB

PCB (2): Display PCB

1) S1, S7 Connector for fan motor

2) S6 Connector for swing motor (horizontal blade)

3) S21 Connector for wired remote controller (option)

4) S26 Connector for display PCB

5) S32 Connector for indoor heat exchanger thermistor

6) H1, H2, H3, FG Connector for terminal board

7) V1 Varistor

8) JA Address setting jumper JB Fan speed setting when compressor stops for thermostat OFF JC Power failure recovery function (auto-restart)

∗

Refer to page 140 for detail.

9) LED A LED for service monitor (green)

10)F1U Fuse (3.15 A, 250 V)

1) S27 Connector for control PCB

2) SW1 (S1W) Forced cooling operation ON/OFF button

3) LED1 (H1P) LED for operation (green)

4) LED2 (H2P) LED for timer (yellow)

5) RTH1 (R1T) Room temperature thermistor

SiBE041102_A Indoor Unit

Printed Circuit Board Connector Wiring Diagram 7

PCB Detail PCB (1): Control PCB

PCB (2): Display PCB

LED_A

F1U

H1H2H3

V1S7S32

S21

S26

2P270085-1

S27

SW1

(Solder side)

LED2 LED1

RTH1

3P206563-1

Outdoor Unit SiBE041102_A

8 Printed Circuit Board Connector Wiring Diagram

2. Outdoor Unit

Connectors and Other Parts

PCB Detail

1) S20 Connector for electronic expansion valve coil

2) S40 Connector for overload protector

3) S70 Connector for fan motor

4) S80 Connector for four way valve coil

5) S90 Connector for thermistors

(outdoor temperature, outdoor heat exchanger, discharge pipe)

6) HL1, HN1, S Connector for terminal board

7) E1, E2 Terminal for earth

8) HR1, HR2 Connector for reactor

9) U, V, W Connector for compressor

10)LED A LED for service monitor (green)

11)FU1, FU2 Fuse (3.15 A, 250 V)

12)FU3 Fuse (20 A, 250 V)

13)V2, V3, V150 Varistor

14)J5 Jumper for improvement of defrost performance

∗

Refer to page 140 for detail.

FU3

FU1

E1, E2

HR1

FU2

HR2

U, V, W

S90S40S20S80

S70

V150

LED A

HN1

HL1

2P271899-1

SiBE041102_A

Function and Control 9

Part 4

Function and Control