Daikin ARXG35E3V1B Service Manual
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Daikin ARXG35E3V1B Service Manual

Inverter pair wall mounted type
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SiBE04 - 809
Inverter Pair
Wall Mounted Type E-Series
[Applied Models]
Inverter Pair : Heat Pump

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Summary of Contents for Daikin ARXG35E3V1B

  • Page 1 SiBE04 - 809 Inverter Pair Wall Mounted Type E-Series [Applied Models] Inverter Pair : Heat Pump...
  • Page 2 SiBE04-809 Inverter Pair E-Series Heat Pump Indoor Unit FTXG25EV1BW FTXG35EV1BW FTXG25EV1BS FTXG35EV1BS ATXG25EV1B ATXG35EV1B Outdoor Unit RXG25E3V1B RXG35E3V1B ARXG25E3V1B ARXG35E3V1B Table of Contents...

  • Page 3: Table Of Contents

    SiBE04-809 1. Introduction .....................v 1.1 Safety Cautions ..................v 1.2 Used Icons ....................ix Part 1 List of Functions ..............1 1. List of Functions ..................2 Part 2 Specifications ..............3 1. Specifications ..................4 Part 3 Printed Circuit Board Connector Wiring Diagram ..... 7 1.
  • Page 4 SiBE04-809 Part 5 Operation Manual ............. 45 1. System Configuration................46 2. Instruction....................47 2.1 Safety Precautions .................47 2.2 Names of Parts..................49 2.3 Preparation Before Operation ..............52 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........55 2.5 Adjusting the Airflow Detection...............57 2.6 POWERFUL Operation ................59 2.7 OUTDOOR UNIT QUIET Operation............60 2.8 INTELLIGENT EYE Operation ...............61...
  • Page 5 SiBE04-809 Part 7 Removal Procedure ............123 1. Indoor Unit...................124 1.1 Removal of Air Filter................124 1.2 Removal of Front Grille ................126 1.3 Removal of Assembly of Front Panel Mechanism........132 1.4 Removal of Lamp Cover...............135 1.5 Removal of Horizontal Blade..............136 1.6 Removal of Reduction Motor..............138 1.7 Removal of Outlet Grille ...............141 1.8 Removal of Vertical Blades and Swing Motor ........142 1.9 Removal of Electrical Box ..............146...

  • Page 6: Introduction

    SiBE04-809 Introduction 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 7 Introduction SiBE04-809 Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2m). Insufficient safety measures may cause a fall accident. In case of R410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R410A refrigerant.
  • Page 8 SiBE04-809 Introduction 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.
  • Page 9 Introduction SiBE04-809 Warning 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. Be sure to install the product correctly by using the provided standard For unitary type installation frame.

  • Page 10: Used Icons

    SiBE04-809 Introduction Caution 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.
  • Page 11 Introduction SiBE04-809...

  • Page 12: Part 1 List Of Functions

    SiBE04-809 Part 1 List of Functions 1. List of Functions ..................2 List of Functions...

  • Page 13: List Of Functions

    List of Functions SiBE04-809 List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter with Bacteriostatic, Function Clean — — –10 –10 Virustatic Functions Operation Limit for Cooling (°CDB) –15 –15 Operation Limit for Heating (°CWB) Photocatalytic Deodorizing Filter —...

  • Page 14: Part 2 Specifications

    SiBE04-809 Part 2 Specifications 1. Specifications ..................4 Specifications...

  • Page 15: Specifications

    Specifications SiBE04-809 Specifications 50Hz 220-230-240V Indoor Units FTXG25EV1BW FTXG25EV1BS Model RXG25E3V1B RXG25E3V1B Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3~3.0) 3.4 (1.3~4.5) 2.5 (1.3~3.0) 3.4 (1.3~4.5) Capacity Btu/h 8,500 (4,400~10,200) 11,600 (4,400~15,400) 8,500 (4,400~10,200) 11,600 (4,400~15,400) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580) 2,920 (1,120~3,870) 2,150 (1,120~2,580) 2,920 (1,120~3,870)
  • Page 16 SiBE04-809 Specifications 50Hz 220-230-240V Indoor Units FTXG35EV1BW FTXG35EV1BS Model RXG35E3V1B RXG35E3V1B Outdoor Units Cooling Heating Cooling Heating 3.5 (1.4~3.8) 4.2 (1.4~5.0) 3.5 (1.4~3.8) 4.2 (1.4~5.0) Capacity Btu/h 11,900 (4,800~13,000) 14,300 (4,800~17,100) 11,900 (4,800~13,000) 14,300 (4,800~17,100) Rated (Min.~Max.) kcal/h 3,010 (1,200~3,270) 3,610 (1,200~4,300) 3,010 (1,200~3,270) 3,610 (1,200~4,300)
  • Page 17 Specifications SiBE04-809 50Hz 220-230-240V Indoor Units ATXG25EV1B ATXG35EV1B Model ARXG25E3V1B ARXG35E3V1B Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3~3.0) 3.4 (1.3~4.5) 3.5 (1.4~3.8) 4.2 (1.4~5.0) Capacity Btu/h 8,500 (4,400~10,200) 11,600 (4,400~15,400) 11,900 (4,800~13,000) 14,300 (4,800~17,100) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580)

  • Page 18: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiBE04-809 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........8 1.1 Indoor Unit....................8 1.2 Outdoor Unit ...................10 Printed Circuit Board Connector Wiring Diagram...

  • Page 19: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram SiBE04-809 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit Connectors PCB(1) (Control PCB) Connector for fan motor Connector for centralized control (HA) Connector for heat exchanger thermistor Connector for INTELLIGENT EYE sensor PCB and control Connector for swing motor Connector for signal receiver PCB Connector for reduction motor (front panel mechanism)
  • Page 20 SiBE04-809 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (indoor unit) JA JC LED A (R8421) PCB(2): Signal Receiver PCB RTH1 LED4 LED2 LED3 (R4992) PCB(3): INTELLIGENT EYE sensor PCB (R4988) Printed Circuit Board Connector Wiring Diagram...

  • Page 21: Outdoor Unit

    Printed Circuit Board Connector Wiring Diagram SiBE04-809 Outdoor Unit Connectors PCB (1) (Filter PCB) Connector for control PCB PCB (2) (Control PCB) 1) S10, Connector for filter PCB Connector for electronic expansion valve coil Connector for compressor motor Connector for overload protector Connector for fan motor Connector for four way valve coil...
  • Page 22 SiBE04-809 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Filter PCB 3P203203 PCB(2): Control PCB (outdoor unit) LED A 2P203198 Printed Circuit Board Connector Wiring Diagram...
  • Page 23 Printed Circuit Board Connector Wiring Diagram SiBE04-809 Printed Circuit Board Connector Wiring Diagram...

  • Page 24: Part 4 Function And Control

    SiBE04-809 Part 4 Function and Control 1. Main Functions..................14 1.1 Frequency Principle................14 1.2 Power-Airflow Flap, Wide-Angle Louvres and Auto-Swing ....16 1.3 Operation Starting Control..............17 1.4 Fan Speed Control for Indoor Units............18 1.5 Programme Dry Function ...............19 1.6 Automatic Operation................20 1.7 Thermostat Control.................21 1.8 NIGHT SET Mode ..................22 1.9 INTELLIGENT EYE ................23 1.10 Inverter POWERFUL Operation .............24...

  • Page 25: Main Functions

    Main Functions SiBE04-809 1. Main Functions Note: See the list of functions for the functions applicable to different models. Frequency Principle Main Control The compressor is frequency-controlled during normal operation. The target frequency is set by the following 2 parameters coming from the operating indoor unit: Parameters The load condition of the operating indoor unit The difference between the room temperature and the set temperature...
  • Page 26 SiBE04-809 Main Functions Inverter Features The inverter provides the following features: The regulating capacity can be changed according to the changes in the outside temperature and cooling/heating load. Quick heating and quick cooling The compressor rotational speed is increased when starting the heating (or cooling). This enables a quick set temperature.

  • Page 27: Power-Airflow Flap, Wide-Angle Louvres And Auto-Swing

    Main Functions SiBE04-809 Power-Airflow Flap, Wide-Angle Louvres and Auto- Swing Power-airflow The large flap sends a large volume of air downwards to the floor. The flap provides an optimum control area in cooling, heating and dry mode. Flap Heating Mode During heating mode, the large flap enables direct warm air straight downwards.

  • Page 28: Operation Starting Control

    SiBE04-809 Main Functions Operation Starting Control The system carries out the following control at the beginning to conduct every functional parts properly. 1. Opening the front panel fully 2. Output of the ∆ D signal after the front panel starts moving 3.

  • Page 29: Fan Speed Control For Indoor Units

    Main Functions SiBE04-809 Fan Speed Control for Indoor Units Control Mode The airflow rate can be automatically controlled depending on the difference between the set temperature and the room temperature. This is done through phase control and hall IC control. For more information about Hall IC, refer to the troubleshooting for fan motor on page 81.

  • Page 30: Programme Dry Function

    SiBE04-809 Main Functions Programme Dry Function Programme dry function removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow volume, the temperature adjustment and fan adjustment buttons are inoperable in this mode. In Case of The microcomputer automatically sets the temperature and fan settings.

  • Page 31: Automatic Operation

    Main Functions SiBE04-809 Automatic Operation Automatic Cooling / Heating Function (Heat Pump Only) When the AUTO mode is selected with the remote controller, the microcomputer automatically determines the operation mode from cooling and heating according to the room temperature and setting temperature at the time of the operation startup, and automatically operates in that mode.

  • Page 32: Thermostat Control

    SiBE04-809 Main Functions Thermostat Control Thermostat control is based on the difference between the room temperature and the setpoint. Thermostat OFF Condition The temperature difference is in the zone A. Thermostat ON Condition The temperature difference is above the zone C after being in the zone A. The system resumes from defrost control in any zones except A.

  • Page 33: Night Set Mode

    Main Functions SiBE04-809 NIGHT SET Mode When the OFF timer is set, the NIGHT SET circuit automatically activates. The NIGHT SET circuit maintains the airflow setting made by users. NIGHT SET The NIGHT SET circuit continues heating or cooling the room at the set temperature for the first Circuit one hour, then automatically raises the temperature setting slightly in the case of cooling, or lowers it slightly in the case of heating, for economical operations.

  • Page 34: Intelligent Eye

    SiBE04-809 Main Functions INTELLIGENT EYE This is the function that detects existence of humans in the room by a human motion sensor (INTELLIGENT EYE) and reduces the capacity when there is no human in the room in order to save electricity. Processing 1.

  • Page 35: Inverter Powerful Operation

    Main Functions SiBE04-809 Since the set temperature is shifted by 2°C higher for 40 minutes, compressor speed becomes low and can realize energy saving operation. But as thermostat is prone to be off by the fact that the set temperature has been shifted, the thermostat-off action is prohibited in 40 minutes so as to prevent this phenomena.

  • Page 36: Other Functions

    SiBE04-809 Main Functions 1.11 Other Functions 1.11.1 Hot-start Function Heat Pump Only In order to prevent the cold air blast that normally comes when heating is started, the temperature of the heat exchanger of the indoor unit is detected, and either the airflow is stopped or is made very weak thereby carrying out comfortable heating of the room.
  • Page 37 Main Functions SiBE04-809 1.11.7 Auto-restart Function Even if a power failure (including one for just a moment) occurs during the operation, the operation restarts in the condition before power failure automatically when power is restored. (Note) It takes 3 minutes to restart the operation because the 3-minute standby function is activated.

  • Page 38: Function Of Thermistor

    SiBE04-809 Function of Thermistor Function of Thermistor Heat Pump Model Four way valve Compressor (R3305) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. The system sets a target discharge temperature according to the outdoor and indoor heat Exchanger exchanger temperature, and controls the electronic expansion valve opening so that the Thermistor...

  • Page 39: Control Specification

    Control Specification SiBE04-809 3. Control Specification Mode Hierarchy Outline There are two modes; the mode selected in user’s place (normal air conditioning mode) and forced operation mode for installation and providing service. Detail 1. For heat pump model There are following modes; stop, cooling (includes drying), heating (include defrosting) Air conditioner control mode Forced operating mode Forced cooling (for Pump Down Operation)

  • Page 40: Frequency Control

    SiBE04-809 Control Specification Frequency Control Outline Frequency will be determined according to the difference between room and set temperature. The function is explained as follows. 1. How to determine frequency. 2. Frequency command from an indoor unit. (The difference between a room temperature and the temperature set by the remote controller.) 3.
  • Page 41 Control Specification SiBE04-809 Indoor Frequency Command ( ∆ D signal) The difference between a room temperature and the temperature set by the remote controller will be taken as the “ ∆ D signal” and is used for frequency command. ∆D ∆D ∆D ∆D...

  • Page 42: Controls At Mode Changing / Start-Up

    SiBE04-809 Control Specification Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline Operate the inverter in the open phase operation with the conditions including the preheating command, outdoor air temperature and discharge pipe temperature from the indoor side. Outside temperature ≥ 10°C → Control A (preheating for normal state) Detail Outside temperature <...
  • Page 43 Control Specification SiBE04-809 3.3.2 Four Way Valve Switching Outline During the heating operation current must be conducted and during cooling and defrosting current must not be conducted. In order to eliminate the switching sound (as the four way valve coil switches from ON to OFF) when the heating is stopped, the delay switch of the four way valve must be carried out after the operation stopped.
  • Page 44 SiBE04-809 Control Specification 3.3.3 Four Way Valve Operation Compensation Outline Heat pump only At the beginning of the operation as the four way valve is switched, acquire the differential pressure required for activating the four way valve by having output the operating frequency, which is more than a certain fixed frequency, for a certain fixed time.

  • Page 45: Discharge Pipe Temperature Control

    Control Specification SiBE04-809 3.3.4 3-Minute Standby Prohibit to turn ON the compressor for 3 minutes after turning it off. (Except when defrosting.) 3.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows.

  • Page 46: Input Current Control

    SiBE04-809 Control Specification Input Current Control Outline The microcomputer calculates the input current during the compressor is running, and set the frequency upper limit from such input current. In case of heat pump model, this control is the upper limit control function of the frequency which takes priority of the lower limit of four way valve activating compensation.

  • Page 47: Freeze-Up Protection Control

    Control Specification SiBE04-809 Freeze-up Protection Control Outline During cooling operation, the signals being sent from the indoor unit allow the operating frequency limitation and then prevent freezing of the indoor heat exchanger. (The signal from the indoor unit must be divided into the zones as the followings. Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec from...

  • Page 48: Heating Peak-Cut Control

    SiBE04-809 Control Specification Heating Peak-cut Control Outline During heating operation, the signals being sent from the indoor unit allow the operating frequency limitation and prevent abnormal high pressure. (The signal from the indoor unit must be divided as follows.) Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature.

  • Page 49: Fan Control

    Control Specification SiBE04-809 Fan Control Outline Fan control is carried out according to the following conditions. 1. Fan ON control for electric component cooling fan 2. Fan control when defrosting 3. Fan OFF delay when stopped 4. Fan control for maintaining pressure difference 5.
  • Page 50 SiBE04-809 Control Specification 86Hz 76Hz 30Hz PI control Frequency 60sec. 60sec. 50sec. 660sec. 50sec. Compressor Four way valve 5sec. 5sec. Outdoor temp. ≥ 0˚C Outdoor temp. < 0˚C 450pulse 350pulse 450pulse Electronic expansion valve opening Initial opening (R8329) Function and Control...

  • Page 51: Electronic Expansion Valve Control

    Control Specification SiBE04-809 3.11 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Open Control 1.
  • Page 52 SiBE04-809 Control Specification 3.11.1 Fully Closing with Power ON Initialize the electronic expansion valve when turning on the power, set the opening position and develop pressure equalizing. 3.11.2 Pressure Equalization Control When the compressor is stopped, open and close the electronic expansion valve and develop pressure equalization.
  • Page 53 Control Specification SiBE04-809 3.11.7 Control when frequency is changed When the target discharge pipe temperature control is active, if the target frequency is changed for a specified value in a certain time period, cancel the target discharge pipe temperature control and change the target opening of the electronic expansion valve according to the shift. 3.11.8 Target Discharge Pipe Temperature Control Obtain the target discharge pipe temperature from the indoor and outdoor heat exchanger...

  • Page 54: 3.12 Malfunctions

    SiBE04-809 Control Specification 3.12 Malfunctions 3.12.1 Sensor Malfunction Detection Sensor malfunction may occur either in the thermistor or current transformer (CT) system. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Fin thermistor 4. Outside air thermistor 3.12.2 Detection of Overload Over Current...

  • Page 55: Forced Operation Mode

    Control Specification SiBE04-809 3.13 Forced Operation Mode Outline Forced operating mode includes only forced cooling. Detail Forced Cooling Item Forced Cooling Forced operation 1) The outdoor unit is not abnormal and not in allowing conditions the 3-minute standby mode. 2) The operating mode of the outdoor unit is the stop mode.

  • Page 56: Part 5 Operation Manual

    SiBE04-809 Part 5 Operation Manual 1. System Configuration................46 2. Instruction....................47 2.1 Safety Precautions .................47 2.2 Names of Parts..................49 2.3 Preparation Before Operation ..............52 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........55 2.5 Adjusting the Airflow Detection...............57 2.6 POWERFUL Operation ................59 2.7 OUTDOOR UNIT QUIET Operation............60 2.8 INTELLIGENT EYE Operation ...............61...

  • Page 57: System Configuration

    System Configuration SiBE04-809 1. System Configuration After the installation and test operation of the room air conditioner have been completed, it should be operated and handled as described below. Every user would like to know the correct method of operation of the room air conditioner, to check if it is capable of cooling (or heating) well, and to know a clever method of using it.

  • Page 58: Instruction

    • Do not attempt to repair, relocate, modify or reinstall the air conditioner by yourself. Incorrect work will cause electric shocks, fire etc. For repairs and reinstallation, consult your Daikin dealer for advice and information. • Do not insert fingers, poles, or other objects into the moving parts of the front panel or the outlet vent panel.

  • Page 59: Installation Site

    Instruction SiBE04-809 • Do not place appliances which produce open fire in places exposed to the air flow from the unit or under the indoor unit. It may cause incomplete combustion or deformation of the unit due to the heat. •...

  • Page 60: Names Of Parts

    SiBE04-809 Instruction Names of Parts Names of parts Indoor Unit (With the panel closed) Operation Manual...
  • Page 61 Instruction SiBE04-809 Outdoor Unit Indoor Unit 1. Air filter • The operation mode refers to the following table. 2. Titanium Apatite Photocatalytic Tempera- Airflow Air-Purifying Filter: Mode ture setting rate • These filters are attached to the inside of F(C)TXG AUTO 25°C AUTO the air filters.

  • Page 62: Remote Controller

    SiBE04-809 Instruction Remote Controller < ARC433B41 > 1. Signal transmitter: 8. QUIET button: OUTDOOR UNIT QUIET operation (page 15.) • It sends signals to the indoor unit. 9. FAN setting button: 2. Display: • It selects the air flow rate setting. •...

  • Page 63: Preparation Before Operation

    Instruction SiBE04-809 Preparation Before Operation Preparation Before Operation To set the batteries Position + and – correctly! 1. Slide the front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION About batteries •...
  • Page 64 SiBE04-809 Instruction Preparation Before Operation To operate the remote controller • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate.
  • Page 65 Instruction SiBE04-809 To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. Holding down “ ” or “ ” button rapidly increases or decreases the time display. 3.

  • Page 66: Auto · Dry · Cool · Heat · Fan Operation

    SiBE04-809 Instruction AUTO · DRY · COOL · HEAT · FAN Operation OPERATION AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode.
  • Page 67 Instruction SiBE04-809 To change the airflow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of airflow rate setting from “ ” to “ ” plus “ ” “ ” are available. The air flow rate setting is not variable.

  • Page 68: Adjusting The Airflow Detection

    SiBE04-809 Instruction Adjusting the Airflow Detection Adjusting the Airflow Direction You can adjust the air flow direction to increase your comfort. To adjust the horizontal blade (flap) 1. Press “SWING button ”. • “ ” is displayed on the LCD. 2.
  • Page 69 Instruction SiBE04-809 To start COMFORT AIRFLOW operation 5. Press “COMFORT AIRFLOW button”. • The flap orientation will change, preventing air from blowing directly on the occupants of the room. • “ ” is displayed on the LCD. 〈COOL/DRY〉 The flap will go up. 〈HEAT〉...

  • Page 70: Powerful Operation

    SiBE04-809 Instruction POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity. To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used before POWERFUL operation.

  • Page 71: Outdoor Unit Quiet Operation

    Instruction SiBE04-809 OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is convenient during night. To start OUTDOOR UNIT QUIET operation 1.

  • Page 72: Intelligent Eye Operation

    SiBE04-809 Instruction INTELLIGENT EYE Operation INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ” is displayed on the LCD. To cancel the INTELLIGENT EYE operation 1, 2 2.
  • Page 73 Instruction SiBE04-809 “INTELLIGENT EYE” is useful for Energy Saving Energy saving operation • Change the temperature –2°C in heating / +2°C in cooling / +2°C in dry mode from set temperature. • Decrease the air flow rate slightly in fan operation. (In FAN mode only) Notes on “INTELLIGENT EYE”...

  • Page 74: Timer Operation

    SiBE04-809 Instruction TIMER Operation TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER operation •...
  • Page 75 Instruction SiBE04-809 To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. (page 9.) 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.

  • Page 76: Care And Cleaning

    SiBE04-809 Instruction 2.10 Care and Cleaning CARE Care and Cleaning • Before cleaning, be sure to stop the operation and turn the breaker OFF. CAUTION • Always shut down the unit (and close the panel) before doing any work. Opening the panel during operation may cause the panel to fall off. Units Indoor unit, Outdoor unit and Remote controller 1.

  • Page 77: Air Filter

    Instruction SiBE04-809 Filters 1. Open the front panel. • Open the front panel by placing a finger on the panel tab on either side of the front panel and then secure it using the supporting plate on the right. 2. Pull out the air filters. •...

  • Page 78: Before A Long Idle Period

    SiBE04-809 Instruction NOTE • Operation with dirty filters: (1) cannot deodorize the air. (2) cannot clean the air. (3) results in poor heating or cooling. (4) may cause odour. • To order Titanium Apatite Photocatalytic Air-Purifying Filter contact to the service shop there you bought the air conditioner.

  • Page 79: Troubleshooting

    Instruction SiBE04-809 2.11 Troubleshooting TROUBLE SHOOTING Trouble Shooting These cases are not troubles. The following cases are not air conditioner troubles but have some reasons. You may just continue using it. Case Explanation Operation does not start soon. • This is to protect the air conditioner. •...
  • Page 80 SiBE04-809 Instruction Check again. Please check again before calling a repair person. Case Check The air conditioner does not • Hasn’t a breaker turned OFF or a fuse blown? operate. • Isn’t it a power failure? (OPERATION lamp is off.) •...

  • Page 81: Disposal Requirements

    Instruction SiBE04-809 Call the service shop immediately. WARNING When an abnormality (such as a burning smell) occurs, stop operation and turn the breaker OFF. Continued operation in an abnormal condition may result in troubles, electric shocks or fire. Consult the service shop where you bought the air conditioner. Do not attempt to repair or modify the air conditioner by yourself.

  • Page 82: Part 6 Service Diagnosis

    SiBE04-809 Part 6 Service Diagnosis 1. Caution for Diagnosis................72 2. Problem Symptoms and Measures ............73 3. Service Check Function ................74 4. Troubleshooting ..................77 4.1 Error Codes and Description ..............77 4.2 Indoor Unit PCB Abnormality ..............78 4.3 Freeze-up Protection Control or High Pressure Control......79 4.4 Fan Motor (DC Motor) or Related Abnormality........81 4.5 Thermistor or Related Abnormality (Indoor Unit)........83 4.6 Front Panel Open / Close Fault..............84...

  • Page 83: Caution For Diagnosis

    Caution for Diagnosis SiBE04-809 1. Caution for Diagnosis The operation lamp flashes when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions, disabling equipment operation. 2.

  • Page 84: Problem Symptoms And Measures

    SiBE04-809 Problem Symptoms and Measures Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page None of the units operates. Check the power supply. Check to make sure that the rated voltage is — supplied. Check the type of the indoor units. Check to make sure that the indoor unit type is —...

  • Page 85: Service Check Function

    Service Check Function SiBE04-809 Service Check Function In the ARC433 series remote controller, the temperature display sections on the main unit indicate corresponding codes. Check Method 1 1. When the timer cancel button is held down for 5 seconds, a “ 00 ” indication flashes on the temperature display section.
  • Page 86 SiBE04-809 Service Check Function Check Method 2 1. Enter the diagnosis mode. Press the 3 buttons (TEMP▲,TEMP▼, MODE) simultaneously. (R4272) The digit of the number of tens blinks. ★ Try again from the start when the digit does not blink. (R4273) 2.
  • Page 87 Service Check Function SiBE04-809 5. Press the TEMP button. Press TEMP▲ or TEMP▼ and change the digit until you hear the sound of “beep”. (R4277) 6. Diagnose by the sound. ★ “pi” : The both numbers of tens and units do not accord with the error code. ★...

  • Page 88: Troubleshooting

    SiBE04-809 Troubleshooting Troubleshooting Error Codes and Description Reference Code Indication Description Page System — Normal U0★ Insufficient gas Low-voltage detection or over-voltage detection Signal transmission error (between indoor and outdoor units) Signal transmission error (between indoor unit and wired remote controller) Unspecified voltage (between indoor and outdoor unit) Indoor...

  • Page 89: Indoor Unit Pcb Abnormality

    Troubleshooting SiBE04-809 Indoor Unit PCB Abnormality Remote Controller Display Method of Evaluation of zero-cross detection of power supply by indoor unit. Malfunction Detection Malfunction When there is no zero-cross detection in approximately 10 continuous seconds. Decision Conditions Supposed Faulty indoor unit PCB Causes Faulty connector connection Troubleshooting...

  • Page 90: Freeze-Up Protection Control Or High Pressure Control

    SiBE04-809 Troubleshooting Freeze-up Protection Control High Pressure Control Remote Controller Display Method of High pressure control (heat pump model only) Malfunction During heating operations, the temperature detected by the indoor heat exchanger thermistor is used for the high pressure control (stop, outdoor fan stop, etc.) Detection Freeze-up protection control (operation halt) is activated during cooling operation according to the temperature detected by the indoor unit heat exchanger thermistor.
  • Page 91 Troubleshooting SiBE04-809 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Refer to P.118 Check the air passage. Is there any short-circuit? Provide sufficient air passage. Check the intake air filter. Is it very dirty? Clean the air filter.

  • Page 92: Fan Motor (Dc Motor) Or Related Abnormality

    SiBE04-809 Troubleshooting Fan Motor (DC Motor) or Related Abnormality Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection Malfunction When the detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.
  • Page 93 Troubleshooting SiBE04-809 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.01 Turn off power supply and rotate fan by hand. Refer to P.116 Does fan rotate Replace fan motor. smoothly? Turn power ON and operate fan.

  • Page 94: Thermistor Or Related Abnormality (Indoor Unit)

    SiBE04-809 Troubleshooting Thermistor or Related Abnormality (Indoor Unit) Remote Controller Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction When the thermistor input is more than 4.96 V or less than 0.04 V during compressor operation ∗...

  • Page 95: Front Panel Open / Close Fault

    Troubleshooting SiBE04-809 Front Panel Open / Close Fault Remote Controller Display Method of Malfunction Detection Malfunction The system will be shut down when the error occurs twice. Decision Conditions Supposed Malfunction of the reduction motor Causes Malfunction or deterioration of the front panel mechanism Malfunction of the limit switch Troubleshooting Be sure to turn off power switch before connect or disconnect connector,...

  • Page 96: Signal Transmission Error (Between Indoor And Outdoor Unit)

    SiBE04-809 Troubleshooting Signal Transmission Error (between Indoor and Outdoor Unit) Remote Controller Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal. Malfunction Detection Malfunction When the data sent from the outdoor unit cannot be received normally, or when the content of the data is abnormal.

  • Page 97: Signal Transmission Error (Between Indoor Unit And Wired Remote Controller)

    Troubleshooting SiBE04-809 Signal Transmission Error (between Indoor Unit and Wired Remote Controller) Remote Controller Display Method of The data received from the indoor unit in indoor unit-wired remote controller signal transmission is checked whether it is normal. Malfunction Detection Malfunction When the data sent from the indoor unit cannot be received normally, or when the content of the data is abnormal.

  • Page 98: Unspecified Voltage (Between Indoor And Outdoor Units)

    SiBE04-809 Troubleshooting Unspecified Voltage (between Indoor and Outdoor Units) Remote Controller Display Method of The supply power is detected for its requirements (different from pair type and multi type) by the indoor / outdoor transmission signal. Malfunction Detection Malfunction The pair type and multi type are interconnected. Decision Conditions Supposed...

  • Page 99: Outdoor Unit Pcb Abnormality

    Troubleshooting SiBE04-809 4.10 Outdoor Unit PCB Abnormality Remote Controller Display Method of Detect within the programme of the microcomputer that the programme is in normal running order. Malfunction Detection Malfunction When the programme of the microcomputer is in abnormal running order. Decision Conditions Supposed...

  • Page 100: Ol Activation (Compressor Overload)

    SiBE04-809 Troubleshooting 4.11 OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the compressor OL is activated twice, the system will be shut down. The error counter will reset itself if this or any other error does not occur during the following Decision 60-minute compressor running time (total time).

  • Page 101: Compressor Lock

    Troubleshooting SiBE04-809 4.12 Compressor Lock Remote Controller Display Method of A compressor lock is detected by checking the compressor running condition through the Malfunction position detection circuit. Detection Malfunction The system judges the compressor lock, and stops due to over current. The system judges the compressor lock, and cannot operation with position detection within Decision 15 seconds after start up.

  • Page 102: Dc Fan Lock

    SiBE04-809 Troubleshooting 4.13 DC Fan Lock Remote Controller Display Method of A fan motor or related error is detected by checking the high-voltage fan motor rpm being Malfunction detected by the Hall IC. Detection Malfunction The fan does not start in 30 seconds even when the fan motor is running. The system will be shut down if the error occurs 16 times.

  • Page 103: Input Over Current Detection

    Troubleshooting SiBE04-809 4.14 Input Over Current Detection Remote Controller Display Method of An input over-current is detected by checking the input current value with the compressor Malfunction running. Detection Malfunction The following current with the compressor running continues for 2.5 seconds. Cooling / Heating: Above 9.25A Decision Conditions...

  • Page 104: Four Way Valve Abnormality

    SiBE04-809 Troubleshooting 4.15 Four Way Valve Abnormality Remote Controller Display Method of The indoor air temperature thermistor, the indoor unit heat exchanger thermistor, the outdoor Malfunction temperature thermistor and the outdoor unit heat exchanger thermistor are checked to see if they function within their normal ranges in the operating mode.
  • Page 105 Troubleshooting SiBE04-809 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.05 Refer to P.117 Four way valve coil Correct. disconnected (loose)? Check No.06 Refer to P.118 Harness out of connector? Reconnect.

  • Page 106: Discharge Pipe Temperature Control

    SiBE04-809 Troubleshooting 4.16 Discharge Pipe Temperature Control Remote Controller Display Method of The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the Malfunction temperature being detected by the discharge pipe thermistor. Detection Malfunction If a stop takes place 4 times successively due to abnormal discharge pipe temperature, the system will be shut down.
  • Page 107 Troubleshooting SiBE04-809 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Malfunctioning Check No. 06 Refer to P.116 Replace the defective Check the thermistors. Discharge pipe thermistor thermistor.

  • Page 108: High Pressure Control In Cooling

    SiBE04-809 Troubleshooting 4.17 High Pressure Control in Cooling Remote Controller Display Method of High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the Malfunction temperature being sensed by the heat exchanger thermistor exceeds the limit. Detection Malfunction Activated when the temperature being sensed by the heat exchanger thermistor rises above 65°C.
  • Page 109 Troubleshooting SiBE04-809 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Check No.04 Caution or parts damage may be occurred. Refer to P.116 Check the installation space. Check No.06 Refer to P.118 Check No. 07 Abnormal Change the air outlet grille Check the installation position.

  • Page 110: Compressor System Sensor Abnormality

    SiBE04-809 Troubleshooting 4.18 Compressor System Sensor Abnormality Remote Controller Display Method of The system checks the DC current before the compressor starts. Malfunction Detection Malfunction If the DC current before compressor start-up is out of the range 0.5-4.5 V (sensor output converted to voltage value) or if the DC voltage before compressor start-up is below 50 V.

  • Page 111: Position Sensor Abnormality

    Troubleshooting SiBE04-809 4.19 Position Sensor Abnormality Remote Controller Display Method of A compressor startup failure is detected by checking the compressor running condition through Malfunction the position detection circuit. Detection Malfunction The compressor fails to start in about 15 seconds after the compressor run command signal is sent.
  • Page 112 SiBE04-809 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.13 Refer to P.122 Check the supply voltage. Voltage as rated? Correct the power supply. Check No. 13 Check for short-circuit.

  • Page 113: Dc Voltage / Current Sensor Abnormality

    Troubleshooting SiBE04-809 4.20 DC Voltage / Current Sensor Abnormality Remote Controller Display Method of Detecting abnormality of the DC sensor by the running frequency of compressor and by the Malfunction input current multiplied DC voltage and current. Detection Malfunction The compressor running frequency is below 52 Hz. (The input current is also below 0.1 A.) Decision If this error repeats 4 times, the system will be shut down.

  • Page 114: Thermistor Or Related Abnormality (Outdoor Unit)

    SiBE04-809 Troubleshooting 4.21 Thermistor or Related Abnormality (Outdoor Unit) P4 , J3 , J6 , H9 Remote Controller Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. Malfunction [A thermistor error is detected by checking the temperature.] Detection Malfunction The thermistor input is above 4.96 V or below 0.04 V with the power on.
  • Page 115 Troubleshooting SiBE04-809 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Turn on the power again. Refer to P.118 Error displayed Reconnect. again on remote controller? Connector or thermistor Reconnect.

  • Page 116: Electrical Box Temperature Rise

    SiBE04-809 Troubleshooting 4.22 Electrical Box Temperature Rise Remote Controller Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor off. Detection Malfunction With the compressor off, the radiation fin temperature is above 80°C. (Reset is made when the temperature drops below 70°C.) Decision Conditions...
  • Page 117 Troubleshooting SiBE04-809 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 WARNING Refer to P.119 Turn off the power and turn it on again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises above 75˚C and stops itself when...

  • Page 118: Radiation Fin Temperature Rise

    SiBE04-809 Troubleshooting 4.23 Radiation Fin Temperature Rise Remote Controller Display Method of A radiation fin temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor on. Detection Malfunction If the radiation fin temperature with the compressor on is above 90°C. Clearing condition : when the temperature drops below 85°C.
  • Page 119 Troubleshooting SiBE04-809 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Refer to P.118 Turn off the power and turn it on again to get the system started. Check No.07 Refer to P.119 Error displayed again?

  • Page 120: Output Over Current Detection

    SiBE04-809 Troubleshooting 4.24 Output Over Current Detection Remote Controller Display Method of An output over-current is detected by checking the current that flows in the inverter DC section. Malfunction Detection Malfunction A position signal error occurs while the compressor is running. A speed error occurs while the compressor is running.
  • Page 121 Troubleshooting SiBE04-809 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. ∗ An input over-current may result from wrong internal wiring. If the wires have been disconnected and Check No.07 reconnected for part replacement, for example, and the system is interrupted by an input over-current, check the wires again.

  • Page 122: Insufficient Gas

    SiBE04-809 Troubleshooting 4.25 Insufficient Gas Remote Controller Display Method of Gas shortage detection I: Malfunction Gas shortage is detected by checking the input current value and the compressor running frequency. If the gas is short, the input current is smaller than the normal value. Detection Gas shortage detection II: Gas shortage is detected by checking the discharge temperature and the opening of the...
  • Page 123 Troubleshooting SiBE04-809 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.116 Any thermistor Replace in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor Check No.06 * Room temperature thermistor * Outdoor air thermistor...

  • Page 124: Low-Voltage Detection Or Over-Voltage Detection

    SiBE04-809 Troubleshooting 4.26 Low-voltage Detection Over-voltage Detection Remote Controller Display Method of An abnormal voltage rise or drop is detected by checking the detection circuit or DC voltage Malfunction detection circuit. Detection Malfunction An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer (The voltage is over 400V).
  • Page 125 Troubleshooting SiBE04-809 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check the supply voltage. Supply voltage as Correct the power supply. specified? Rotate fan by hand. Does fan rotate Replace fan motor and smoothly? outdoor unit PCB.

  • Page 126: Signal Transmission Error On Outdoor Unit Pcb

    SiBE04-809 Troubleshooting 4.27 Signal Transmission Error on Outdoor Unit PCB Remote Controller Display Method of Communication error between microcomputer mounted on the main microcomputer and PM1. Malfunction Detection Malfunction When the data sent from the PM1 can not be received successively for 9 sec. The abnormality is determined if the above fault conditions occurs once.

  • Page 127: Check

    Check SiBE04-809 5. Check How to Check 5.1.1 Fan Motor Connector Output Check Check No.01 1. Check connector connection. 2. Check motor power supply voltage output (pins 4-7). 3. Check motor control voltage (pins 4-3). 4. Check rotation command voltage output (pins 4-2). 5.

  • Page 128: Sibe04

    SiBE04-809 Check 5.1.3 Four Way Valve Performance Check Check No.05 Turn off the power and turn it on again. ∗ Four way valve coil Start the heating-mode run. Cooling / dry : No continuity Heating : Continuity voltage at DC 220- Replace the outdoor unit 240 V with compressor PCB.

  • Page 129: Thermistor Resistance Check

    Check SiBE04-809 5.1.4 Thermistor Resistance Check Check No.06 Remove the connectors of the thermistors on the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the graph and the table below.

  • Page 130: Installation Condition Check

    SiBE04-809 Check 5.1.5 Installation Condition Check Check No.07 Installation condition check Check the Abnormal allowable dimensions Change the position of the air of the air suction and discharge grille or the discharge area. installation location. Normal Does the discharged air from other outdoor unit cause an Change the position of the air increase of the suction...

  • Page 131: Discharge Pressure Check

    Check SiBE04-809 5.1.6 Discharge Pressure Check Check No.08 Discharge pressure check Replace the compressor. High Is the stop valve open? Open the stop valve. Is the connection pipe Replace the pipe installed at deformed? the site. Dirty Are the heat exchanger Clean.

  • Page 132: Power Supply Waveforms Check

    SiBE04-809 Check 5.1.8 Power Supply Waveforms Check Check No.10 Measure the power supply waveform between pins 1 and 2 on the terminal board, and check the waveform disturbance. Check to see if the power supply waveform is a sine wave (Fig.1). Check to see if there is waveform disturbance near the zero cross (sections circled in Fig.2) [Fig.1] [Fig.2]...

  • Page 133: Power Transistor Check

    Check SiBE04-809 5.1.10 Power Transistor Check Check No.13 Note: Check to make sure that the voltage between the terminal of Power transistor (+) and (-) is approx. 0 volt before checking power transistor. < Measuring method > Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.

  • Page 134: Part 7 Removal Procedure

    SiBE04-809 Part 7 Removal Procedure 1. Indoor Unit...................124 1.1 Removal of Air Filter................124 1.2 Removal of Front Grille ................126 1.3 Removal of Assembly of Front Panel Mechanism........132 1.4 Removal of Lamp Cover...............135 1.5 Removal of Horizontal Blade..............136 1.6 Removal of Reduction Motor..............138 1.7 Removal of Outlet Grille ...............141 1.8 Removal of Vertical Blades and Swing Motor ........142 1.9 Removal of Electrical Box ..............146...

  • Page 135: Indoor Unit

    Indoor Unit SiBE04-809 1. Indoor Unit Removal of Air Filter Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Features Front panel (top) Slot-in panel Room temperature sensor (R5001) When the signal receiver catches a signal from the...
  • Page 136 SiBE04-809 Indoor Unit Step Procedure Points Lift an air filter upwards The right and left air filters slightly and then pull it are interchangeable. out downwards. Insert the air filters along grooves when installing. When installing, insert 2 hooks of the air filter completely.

  • Page 137: Removal Of Front Grille

    Indoor Unit SiBE04-809 Removal of Front Grille Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the front panel. Open the front panel to the horizontal position. Release the both sides pivots and remove the front panel.
  • Page 138 SiBE04-809 Indoor Unit Step Procedure Points The slot-in panel is fixed only at the both ends. When assembling, fit the axes of the slot-in panel from above. Push the lower part of the slot-in panel and attach to the running gear.
  • Page 139 Indoor Unit SiBE04-809 Step Procedure Points The service cover has 2 hooks on the right side and 4 hooks on the lower side. Hooks Hooks (R5014) When assembling, fit the right side hooks and insert the lower hooks while bending the service cover. (R5016) Loosen the screw on the service cover of...
  • Page 140 SiBE04-809 Indoor Unit Step Procedure Points Pull down and remove the service cover of electrical box. Loosen the screw on the fixing plate. Push the white section on the terminal board and release the relay wires. Removal Procedure...
  • Page 141 Indoor Unit SiBE04-809 Step Procedure Points 4. Remove the front grille. The front grille has no screw inside flaps. Loosen the 5 screws. The front grille has 3 Hooks hooks on the upper side. (R5018) Lift the upper part of the Be careful not to cut your front grille and release finger by the fins of the heat...
  • Page 142 SiBE04-809 Indoor Unit Step Procedure Points Release the both sides hooks. Pull the front grille out When assembling, install the horizontally and remove front grille horizontally so as not to stuff the flap inside. When assembling, make sure the three hooks are caught properly.

  • Page 143: Removal Of Assembly Of Front Panel Mechanism

    Indoor Unit SiBE04-809 Removal of Assembly of Front Panel Mechanism Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the front grille. 1. Remove the assembly of front panel mechanism.
  • Page 144 SiBE04-809 Indoor Unit Step Procedure Points Loosen the 2 screws of the assembly (right). Remove the assembly. When assembling, insert the lower rack plate first. Lower rack plate (R5028) Removal Procedure...
  • Page 145 Indoor Unit SiBE04-809 Step Procedure Points 2. Remove the lower rack plate. Loosen the 3 screws of the left assembly cover. Hold the assembly When you demand small horizontally and release parts like cogs and rollers, the upper hook. order a set of assembly. Hook (R5032) Keep the assembly...

  • Page 146: Removal Of Lamp Cover

    SiBE04-809 Indoor Unit Removal of Lamp Cover Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the front grille. 1. Remove the lamp cover. Release the 2 hooks carefully.

  • Page 147: Removal Of Horizontal Blade

    Indoor Unit SiBE04-809 Removal of Horizontal Blade Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the horizontal The horizontal blade is blade. single. Release the center pivot.
  • Page 148 SiBE04-809 Indoor Unit Step Procedure Points 2. Remove the swing motor. The swing motor for horizontal blade is on the left Pull out and remove the side. swing motor connector. Loosen the screw. Pull toward left and The axis has a keyhole. remove the swing motor.

  • Page 149: Removal Of Reduction Motor

    Indoor Unit SiBE04-809 Removal of Reduction Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the front grille. 1. Remove the assembly of reduction motor. Undo the 2 hooks and remove the assembly.
  • Page 150 SiBE04-809 Indoor Unit Step Procedure Points 2. Remove the reduction motor. Loosen the screw. Undo the one hook on the opposite upper side. Undo the one hook in the center. Removal Procedure...
  • Page 151 Indoor Unit SiBE04-809 Step Procedure Points Hold the cog horizontally and open the motor side toward Layout of the harness of the motor. Lift and remove the reduction motor. Pull and disconnect the connector for the motor. Removal Procedure...

  • Page 152: Removal Of Outlet Grille

    SiBE04-809 Indoor Unit Removal of Outlet Grille Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the front grille. Remove the assembly of the reduction motor. 1.

  • Page 153: Removal Of Vertical Blades And Swing Motor

    Indoor Unit SiBE04-809 Removal of Vertical Blades and Swing Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the assembly of the outlet grille. 1. Remove the vertical blades.
  • Page 154 SiBE04-809 Indoor Unit Step Procedure Points Remove the interlock rod from the vertical blades. (R3834) (R3835) Pull out the interlock You cannot dismantle the rod from the swing caulking section. motor side. Push the hooks on the back of the vertical blades and remove.
  • Page 155 Indoor Unit SiBE04-809 Step Procedure Points 2. Remove the swing motor. Disconnect the connector for the swing motor. Loosen the screw and remove the swing motor. Peel the fixing tape. Removal Procedure...
  • Page 156 SiBE04-809 Indoor Unit Step Procedure Points Loosen the screw and The projection is fragile. Be pull out the swing careful so as not to break it. motor. Disconnect the connector for the swing motor. Removal Procedure...

  • Page 157: Removal Of Electrical Box

    Indoor Unit SiBE04-809 Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the front grille. Discharge the static Drip proof plate electricity from your body 1.
  • Page 158 SiBE04-809 Indoor Unit Step Procedure Points Push the hook on the right side and remove the electrical box cover. Layout of the wiring Loosen the screw of the earth. Removal Procedure...
  • Page 159 Indoor Unit SiBE04-809 Step Procedure Points Disconnect the The harnesses for the connector for the swing horizontal swing motor and motors for horizontal the vertical swing motor are and vertical blades united. (S41). Release the harness from the hook. Disconnect the connector for the fan motor (S1).
  • Page 160 SiBE04-809 Indoor Unit Step Procedure Points Disconnect the connector for the reduction motor (front panel mechanism) (S49). Release the harness from the hook. Release the heat Pay attention so as not to exchanger thermistor. lose the clip. Release the thermistor When reassembling, hang lead wire from the hook.
  • Page 161 Indoor Unit SiBE04-809 Step Procedure Points Layout of the lead wire for the heat exchanger thermistor Loosen the screw of the electrical box. Tilt the front part of the electrical box to the right slightly and pull it out. Removal Procedure...
  • Page 162 SiBE04-809 Indoor Unit Step Procedure Points When assembling, push the electrical box upright and make sure to fit the hook on the backside. Removal Procedure...

  • Page 163: Removal Of Pcb

    Indoor Unit SiBE04-809 1.10 Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the electrical box. 1. Remove the control PCB. Lift up the cover of the electrical box and open Release the right hook and remove the cover.
  • Page 164 SiBE04-809 Indoor Unit Step Procedure Points Loosen the screws of the earth. Release the front hook and the 2 upper hooks, and remove the shelter. Removal Procedure...
  • Page 165 Indoor Unit SiBE04-809 Step Procedure Points Layout of the wiring Loosen the screw and pull out the terminal board. Removal Procedure...
  • Page 166 SiBE04-809 Indoor Unit Step Procedure Points Pull out the limit switch. Disconnect the Pb free soldering is adopted terminals from the for PCB. board. When replacing PCB, use the particular solder and iron. Black······(1) White······(2) Red ········(3) Cut the clamps. Clamps should be used all the time.
  • Page 167 Indoor Unit SiBE04-809 Step Procedure Points Release the hooks and draw out the harness from the ditch. Loosen the 2 screws and remove the PCB. Control PCB S51JB JA JC (R5062) Removal Procedure...
  • Page 168 SiBE04-809 Indoor Unit Step Procedure Points 2. Remove the signal receiver PCB. Release the hook with a flat screwdriver. Release the hook and remove the receiver unit. Release the 2 hooks and remove the signal receiver PCB. Removal Procedure...

  • Page 169: Removal Of Heat Exchanger

    Indoor Unit SiBE04-809 1.11 Removal of Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the electrical You can detach the indoor box. unit without removing the assembly of the outlet grille.
  • Page 170 SiBE04-809 Indoor Unit Step Procedure Points 3. Remove the piping fixture plate. Release the 2 hooks with a flat screwdriver from the front side. Release the hook from the back side. Lift up the lower part of the fixture plate and remove it.
  • Page 171 Indoor Unit SiBE04-809 Step Procedure Points 4. Remove the heat exchanger. Widen the auxiliary piping to the extent of 10°~20°. Loosen the 2 screws on the left. Push the fixing hook on Caution the right side and lift the When removing or heat exchanger.

  • Page 172: 1.12 Removal Of Fan Rotor And Fan Motor

    SiBE04-809 Indoor Unit 1.12 Removal of Fan Rotor and Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the right side plate. Loosen the 2 screws. Remove the right side plate.
  • Page 173 Indoor Unit SiBE04-809 Step Procedure Points 3. Remove the bearing. Lift up the right part of the fan rotor and motor, and slide them to the rightward to remove. Removal Procedure...
  • Page 174 SiBE04-809 Indoor Unit Step Procedure Points Hold the lower outside of the bearing. Push it inwards and lift to release the hook. 4. Remove the fan motor. Loosen the fixing screw and remove the fan motor. Removal Procedure...

  • Page 175: Outdoor Unit

    Outdoor Unit SiBE04-809 2. Outdoor Unit Removal of Panels and Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Features Handle (R7186) Take care not to cut your finger by the fins of the heat exchanger.
  • Page 176 SiBE04-809 Outdoor Unit Step Procedure Points 2. Remove the panels. Top panel Loosen the 2 screws (right, left) and lift the panel. (R7190) Remove the drip proof Drip proof plate plate. (R7191) Loosen the 4 screws of the discharge grille. (R7192) The discharge grille has 4 hooks.
  • Page 177 Outdoor Unit SiBE04-809 Step Procedure Points Loosen the 8 screws of front panel. Front panel (R7194) Undo the hooks. The front panel has 4 hooks. Pull and remove the The fan motor is united with front panel. the front panel. Hooks (R7195) Removal Procedure...
  • Page 178 SiBE04-809 Outdoor Unit Step Procedure Points 3. Remove the fan motor. The screw has clockwise winding. Unscrew the washer- fitted nut (M10) of the propeller fan with a spanner. Propeller fan (R7196) Remove the propeller Align mark of the fan. propeller fan with D-cut section of the motor shaft when reassembling.
  • Page 179 Outdoor Unit SiBE04-809 Step Procedure Points Disconnect the fan motor connector [S70]. (R7199) The illustration shows Fan motor arrangement of the fan lead wire motor lead wire. (R7200) Loosen the fixing hooks Put the lead wire through the and release the lead back of the motor when wire.
  • Page 180 SiBE04-809 Outdoor Unit Step Procedure Points Loosen the screw to remove the fan motor fixing frame. Fan motor fixing frame (R7204) (R7205) When reassembling, fit the lower hook into the bottom frame. (R7206) Removal Procedure...
  • Page 181 Outdoor Unit SiBE04-809 Step Procedure Points 4. Remove the right side panel. Loosen the 2 screws on the rear side. (R7207) Unhook the outdoor air Outdoor air thermistor thermistor. (R7208) Lift up the guard net to Guard net remove. (R7209) Removal Procedure...
  • Page 182 SiBE04-809 Outdoor Unit Step Procedure Points Loosen the 4 screws on the right side. Right side panel (R7210) Loosen the screw and lift the connection port to remove. (R7211) Removal Procedure...
  • Page 183 Outdoor Unit SiBE04-809 Step Procedure Points When reassembling, make sure to fit the hook. (R7212) Lift up the right side panel to remove. Hook (R7213) Removal Procedure...

  • Page 184: Removal Of Electrical Box

    SiBE04-809 Outdoor Unit Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the top panel. Disconnect the connector for fan motor. 1. Remove the electrical box.
  • Page 185 Outdoor Unit SiBE04-809 Step Procedure Points Disconnect the The positions of connectors connector for overload on PCB are different protector [S40]. according to the models. (R7217) Disconnect the connector for electronic expansion valve coil [S20]. (R7218) Disconnect the connector for four way valve coil [S80].
  • Page 186 SiBE04-809 Outdoor Unit Step Procedure Points Release the discharge Pay attention so as not to pipe thermistor. lose the clip for thermistor. Discharge pipe thermistor (R7220) Cut the clamp. (R7221) Pull out the heat Pay attention so as not to exchanger thermistor.
  • Page 187 Outdoor Unit SiBE04-809 Step Procedure Points Lift and remove the Electrical Box electrical box. (R7223) Removal Procedure...

  • Page 188: Removal Of Reactor And Partition Plate

    SiBE04-809 Outdoor Unit Removal of Reactor Partition Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels. Reactor Remove the electrical box. 1. Remove the reactor. Loosen the screw.
  • Page 189 Outdoor Unit SiBE04-809 Step Procedure Points The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. (R7227) When reassembling, fit the lower hook into the bottom frame. Hook (R7228) Removal Procedure...

  • Page 190: Removal Of Sound Blanket

    SiBE04-809 Outdoor Unit Removal of Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels. Remove the electrical box. 1. Remove the sound blanket.
  • Page 191 Outdoor Unit SiBE04-809 Step Procedure Points Pull the sound blanket Since the piping ports on the (inner) out. sound blanket are torn easily, remove the blanket carefully. (R7232) Removal Procedure...

  • Page 192: Removal Of Four Way Valve

    SiBE04-809 Outdoor Unit Removal of Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the peripheries. Remove the electronic expansion valve coil. (R7233) Terminal cover Remove the...
  • Page 193 Outdoor Unit SiBE04-809 Step Procedure Points Loosen the screw of the four way valve coil. Caution Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas welding rod. Caution From the viewpoint of global environment protection, do not discharge the refrigerant gas in the atmosphere.
  • Page 194 SiBE04-809 Outdoor Unit Step Procedure Points Provide a protective sheet or Warning a steel plate so that the If refrigerant gas leaks brazing flame cannot during the job, influence peripheries. ventilate the room. Be careful so as not to break (Bear in mind that if the pipes by pressing it the refrigerant gas is...

  • Page 195: Removal Of Compressor

    Outdoor Unit SiBE04-809 Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the compressor. Unscrew the nut of the compressor. Warning Ventilate when refrigerant leaks during the work.
  • Page 196 SiBE04-809 Outdoor Unit Step Procedure Points Heat up the brazed part of the suction side and disconnect. (R7253) Lift the compressor up and remove it. (R7254) Removal Procedure...

  • Page 197: Removal Of Pcb

    Outdoor Unit SiBE04-809 Removal of Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the PCB. You can remove the PCB when you disconnect the Feature of the PCB read wires on the terminal board without removing the...
  • Page 198 SiBE04-809 Outdoor Unit Step Procedure Points Loosen the 4 screws. The positions of screws are different according to the models. Screws (R7258) Undo the 3 hooks on the upper side. (R7259) Lift and pull out the PCB. Removal Procedure...
  • Page 199 Outdoor Unit SiBE04-809 Step Procedure Points Feature of the PCB See page 11 for detail. Glass fuse S70: fan motor 3.15 A S80: four way valve S90: thermistor (outdoor air, heat exchanger, discharge pipe) LED A (R7260) Removal Procedure...

  • Page 200: Part 8 Others

    SiBE04-809 Part 8 Others 1. Others ....................190 1.1 Test Run from the Remote Controller ..........190 1.2 Jumper Settings ...................191 1.3 Application of Silicon Grease to a Power Transistor and a Diode Bridge..................192 Others...

  • Page 201: Others

    Others SiBE04-809 1. Others Test Run from the Remote Controller For Heat pump In cooling mode, select the lowest programmable temperature; in heating mode, select the highest programmable temperature. Trial operation may be disabled in either mode depending on the room temperature. After trial operation is complete, set the temperature to a normal level.

  • Page 202: Jumper Settings

    SiBE04-809 Others Jumper Settings 1.2.1 When Two Units are Installed in One Room When two indoor units are installed in one room, the two wireless remote controllers can be set for different addresses. How to set the different addresses Control PCB of the indoor unit (1) Remove the front grille.

  • Page 203: Application Of Silicon Grease To A Power Transistor And A Diode Bridge

    Others SiBE04-809 Application of Silicon Grease to a Power Transistor Diode Bridge Applicable All outdoor units using inverter type compressor for room air conditioner. Models When the printed circuit board of an outdoor unit is replaced, it is required that silicon grease (*1) is certainly applied to the heat radiation part (the contact point to the heat radiation fin) of the power transistor and diode bridge.

  • Page 204: Part 9 Appendix

    SiBE04-809 Part 9 Appendix 1. Piping Diagrams..................194 1.1 Indoor Units ..................194 1.2 Outdoor Units ..................194 2. Wiring Diagrams..................195 2.1 Indoor Units ..................195 2.2 Outdoor Units ..................195 Appendix...

  • Page 205: Piping Diagrams

    Piping Diagrams SiBE04-809 Piping Diagrams Indoor Units FTXG25/35EV1BW(S), ATXG25/35EV1B INDOOR UNIT HEAT EXCHANGER 7.0CuT 7.0CuT 7.0CuT THERMISTOR ON HEAT EXCH. 7.0CuT CROSS FLOW FAN FIELD PIPING (6.4CuT) FAN MOTOR 9.5CuT FIELD PIPING (9.5CuT) REFRIGERANT FLOW COOLING HEATING 4D045301B Outdoor Units RXG25/35E3V1B, ARXG25/35E3V1B OUTDOOR UNIT OUTDOOR TEMPERATURE...

  • Page 206: Wiring Diagrams

    SiBE04-809 Wiring Diagrams Wiring Diagrams Indoor Units FTXG25/35EV1BW(S), ATXG25/35EV1B PCB2 LED4 LED3 LED2 SIGNAL RECEIVER GRN / YLW WIRELESS FIELD WIRING. t° REMOTE GRN / YLW CONTROLLER PCB3 PCB1 TRANSMISSION CIRCUIT outdoor INTELLIGENT- EYE SENSOR CAUTION NOTE THAT OPERATION WILL 3.15A RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS...
  • Page 207 Wiring Diagrams SiBE04-809 Appendix...

  • Page 208: Index

    SiBE04-809 Index Numerics check No.15 ............122 comfort airflow mode ..........16 00 ................77 compressor ............184 3-D airflow ..............16 compressor lock ............ 90 3-minute standby ..........26, 34 compressor motor ..........173 compressor overload ..........89 compressor protection function ......34 A1 ................78 compressor system sensor abnormality ....
  • Page 209 SiBE04-809 F6 ..............97 H0 ..............99 grille H6 ..............100 front grille ..........126, 130 H8 ..............102 outlet grille ............ 141 H9 ..............103 J3 ..............103 J6 ..............103 H0 ................99 L3 ..............105 H6 ................ 100 L4 ..............107 H8 ................ 102 L5 ..............109 H9 ................
  • Page 210 SiBE04-809 INTELLIGENT EYE PCB ........9 signal receiver PCB ........9, 157 mode hierarchy ............28 problem symptoms and measures ......73 mold proof air filter (pre-filter) .........25 programme dry function ........19 motor propeller fan ............167 fan motor ..........161, 164 reduction motor ..........8, 138 swing motor ...........137, 144 rack plate .............
  • Page 211 SiBE04-809 terminal board ..........154, 186 terminal cover ............181 test run ..............190 thermistor discharge pipe thermistor ..27, 41, 104, 175 function ............27 heat exchanger thermistor .......83, 175 indoor heat exchanger thermistor ....27, 149 outdoor air temperature thermistor ....104 outdoor heat exchanger thermistor ..27, 104 radiation fin thermistor ........104 room temperature thermistor ......83 thermistor or related abnormality (indoor unit) ..83...
  • Page 212 SiBE04-809 Drawings & Flow Charts Numerics function of thermistor heat pump model ..........27 3-D airflow ..............16 heating peak-cut control ........37 ARC433 series ............74 high pressure control in cooling ......97 automatic airflow control ........18 automatic operation ..........20 auto-swing ..............16 indoor unit PCB abnormality .........
  • Page 213 SiBE04-809 radiation fin temperature rise .......107 remote controller ............74 service check function ..........74 signal receiver PCB ..........9 signal transmission error (between indoor and outdoor units) ....85 signal transmission error (between indoor unit and wired remote controller) ........86 signal transmission error on outdoor unit PCB ..115 silicon grease ............192 starting control flow ..........17 starting timing chart ..........17...
  • Page 214 Specifications, designs and other content appearing in this brochure are current as of April 2008 but subject to change without notice. SiBE04-809 Printed in Japan 04/2008 B AK...

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