Page 1 SiBE04 - 824 Inverter Pair Wall Mounted Type E-Series [Applied Models] Inverter Pair : Heat Pump...
Page 2 SiBE04-824 Inverter Pair E-Series Heat Pump Indoor Unit ATXS25EV1B7 ATXS35EV1B7 ATXS50EV1B7 Outdoor Unit ARXS25F3V1B ARXS35F3V1B ARXS50E3V1B Table of Contents...
Page 3: Table Of Contents
SiBE04-824 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 SiBE04-824 2. Instruction....................49 2.1 Safety precautions..................49 2.2 Name of Parts ..................51 2.3 Preparation Before Operation ..............54 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........57 2.5 Adjusting the Airflow Direction..............59 2.6 POWERFUL Operation ................61 2.7 OUTDOOR UNIT QUIET Operation............62 2.8 ECONO Operation .................63 2.9 INTELLIGENT EYE Operation ...............64 2.10 TIMER Operation ...................66...
Page 5 SiBE04-824 Part 7 Removal Procedure ............137 1. Indoor Unit...................138 1.1 Removal of Air Filter................138 1.2 Removal of Front Panel................140 1.3 Removal of Front Grille ................142 1.4 Removal of Horizontal Blades and Vertical Blades ......145 1.5 Removal of Electrical Box ..............148 1.6 Removal of PCB...................151 1.7 Removal of Drain Pan Unit ..............157 1.8 Removal of Fan Motor................161...
Page 6: Introduction
SiBE04-824 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 SiBE04-824 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 SiBE04-824 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 SiBE04-824 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
SiBE04-824 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 SiBE04-824...
Page 12: Part 1 List Of Functions
SiBE04-824 Part 1 List of Functions 1. List of Functions ..................2 List of Functions...
Page 13: List Of Functions
List of Functions SiBE04-824 1. List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Function Clean Air Purifying Filter — — –10 –10 Operation Limit for Cooling (°CDB) ★ –15 –15 Operation Limit for Heating (°CWB) Photocatalytic Deodorizing Filter —...
Page 14: Part 2 Specifications
SiBE04-824 Part 2 Specifications 1. Specifications ..................4 Specifications...
Page 15: Specifications
Specifications SiBE04-824 1. Specifications 50Hz 220-230-240V Indoor Units ATXS25EV1B7 ATXS35EV1B7 Model ARXS25F3V1B ARXS35F3V1B Outdoor Units Cooling Heating Cooling Heating 2.5 (1.2~3.0) 3.4 (1.2~4.5) 3.4 (1.2~3.8) 4.0 (1.2~5.0) Capacity Btu/h 8,500 (4,100~10,200) 11,600 (4,100~15,400) 11,600 (4,100~13,000) 13,600 (4,100~17,100) Rated (Min.~Max.) kcal/h...
Page 16 SiBE04-824 Specifications 50Hz 230V Indoor Units ATXS50EV1B7 Model ARXS50E3V1B Outdoor Units Cooling Heating 5.0 (2.0~5.2) 5.8 (2.0~6.0) Capacity Btu/h 17,100 (6,800~17,700) 19,800 (6,800~20,500) Rated (Min.~Max.) kcal/h 4,300 (1,720~4,470) 4,990 (1,720~5,160) Moisture Removal — Running Current (Rated) Power Consumption 1,650 (500~1,820) 2,060 (520~2,190) Rated (Min.~Max.) Power Factor...
Page 17 Specifications SiBE04-824 Specifications...
Page 18: Part 3 Printed Circuit Board Connector Wiring Diagram
SiBE04-824 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 SiBE04-824 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit Connectors PCB(1) (Control PCB) Connector for DC fan motor Connector for swing motor (horizontal blades) Connector for centralized control (HA) Connector for display PCB Connector for signal receiver PCB Connector for heat exchanger thermistor Connector for INTELLIGENT EYE sensor PCB...
Page 20 SiBE04-824 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB +12V LED A (R6039) PCB(2): Signal Receiver PCB PCB(3): Display PCB LED1 LED2 LED3 RTH1 (R5183) (R4290) PCB(4): INTELLIGENT EYE sensor PCB (R4291) Printed Circuit Board Connector Wiring Diagram...
Page 21: Outdoor Unit
Printed Circuit Board Connector Wiring Diagram SiBE04-824 Outdoor Unit 1.2.1 ARXS 25/35 F Connectors PCB (1) (Filter PCB) Connector for control PCB PCB (2) (Control PCB) 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 SiBE04-824 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Filter PCB V3 V2 FU3(20A) (R4293) PCB(2): Control PCB (outdoor unit) S40 LED A FU2(3.15A) FU1(3.15A) (R4605) Printed Circuit Board Connector Wiring Diagram...
Page 23 Printed Circuit Board Connector Wiring Diagram SiBE04-824 1.2.2 ARXS 50 E Connectors PCB(1)(Main PCB) Connector for terminal strip (indoor-outdoor transmission) Connector for electronic expansion valve coil Connector for overload protector 4) S51, S101 Connector for service monitor PCB Connector for fan motor Connector for four way valve coil Connector for thermistors (outdoor air, heat exchanger, and discharge pipe)
Page 24 SiBE04-824 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): ìMain PCB FU2(3.15A) (30A) S101 FU3(3.15A) (R5201) PCB(2): Service Monitor PCB LED A S102 (R5203) Printed Circuit Board Connector Wiring Diagram...
Page 25 Printed Circuit Board Connector Wiring Diagram SiBE04-824 Printed Circuit Board Connector Wiring Diagram...
Page 26: Part 4 Function And Control
SiBE04-824 Part 4 Function and Control 1. Main Functions..................16 1.1 Frequency Principle................16 1.2 Airflow Direction Control.................18 1.3 Fan Speed Control for Indoor Units............19 1.4 Programme Dry Function ...............20 1.5 Automatic Operation................21 1.6 Thermostat Control.................22 1.7 NIGHT SET Mode ..................23 1.8 ECONO Mode ..................24 1.9 INTELLIGENT EYE ................25 1.10 Inverter POWERFUL Operation .............27 1.11 Other Functions..................28...
Page 27: Main Functions
Main Functions SiBE04-824 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 28 SiBE04-824 Main Functions Inverter Features The inverter provides the following features: The regulating capacity can be changed according to the changes in the outdoor air 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 29: Airflow Direction Control
Main Functions SiBE04-824 Airflow Direction Control Power-Airflow The large flaps send a large volume of air downwards to the floor. The flap provides an optimum control area in cooling, heating and dry mode. Dual Flaps Heating Mode During heating mode, the large flap enables direct warm air straight downwards. The flap presses the warm air above the floor to reach the entire room.
Page 30: Fan Speed Control For Indoor Units
SiBE04-824 Main Functions 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 trouble shooting for fan motor on page 85.
Page 31: Programme Dry Function
Main Functions SiBE04-824 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 32: Automatic Operation
SiBE04-824 Main Functions 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 33: Thermostat Control
Main Functions SiBE04-824 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 34: Night Set Mode
SiBE04-824 Main Functions 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. The 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 35: Econo Mode
Main Functions SiBE04-824 ECONO Mode Outline The "ECONO mode" reduces the maximum operating current and power consumption by approx. 30% during start up etc.. This mode is particularly convenient for energy-saving-oriented users. It is also a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners.
Page 36: Intelligent Eye
SiBE04-824 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 37 Main Functions SiBE04-824 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 38: Inverter Powerful Operation
SiBE04-824 Main Functions 1.10 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Details of the When POWERFUL button is pushed in each operation mode, the fan speed / setting temperature will be converted to the following states in a period of twenty minutes.
Page 39: Other Functions
Main Functions SiBE04-824 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 40 SiBE04-824 Main Functions 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 41: Function Of Thermistor
Function of Thermistor SiBE04-824 Function of Thermistor 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 42: Control Specification
SiBE04-824 Control Specification 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 43: Frequency Control
Control Specification SiBE04-824 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 44 SiBE04-824 Control Specification 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 45: Controls At Mode Changing / Start-Up
Control Specification SiBE04-824 Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline 25/35 class Operate the inverter in the open phase operation with the conditions including the preheating command from the discharge pipe temperature. 50 class Operate the inverter in the open phase operation with the conditions including the outdoor air temperature, discharge pipe temperature, and fin temperature (internal temperature of PM1).
Page 46: Compressor Protection Function
SiBE04-824 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 47: Discharge Pipe Temperature Control
Control Specification SiBE04-824 Discharge Pipe Temperature Control Outline The discharge pipe temperature is used as the compressor's internal temperature. If the discharge pipe temperature rises above a certain level, the operating frequency upper limit is set to keep this temperature from going up further. Detail Divide the Zone 25/35 class...
Page 48: Input Current Control
SiBE04-824 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 49: Freeze-Up Protection Control
Control Specification SiBE04-824 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 50: Fan Control
SiBE04-824 Control Specification Fan Control Outline Fan control is carried out with following conditions. 25/35 class 1. Fan control when defrosting 2. Fan OFF delay when stopped 3. ON/OFF control when cooling operation 4. Fan control when forced operation 5. Fan control in low noise mode 6.
Page 51: Defrost Control
Control Specification SiBE04-824 3.10 Defrost Control Outline Heat Pump Only Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing. Detail Conditions for Starting Defrost The starting conditions must be made with the outdoor air temperature and heat exchanger temperature.
Page 52: Electronic Expansion Valve Control
SiBE04-824 Control Specification 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 53 Control Specification SiBE04-824 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 54 SiBE04-824 Control Specification 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 55: Malfunctions
Control Specification SiBE04-824 3.12 Malfunctions 3.12.1 Sensor Malfunction Detection Sensor malfunction may occur in the thermistor. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Fin thermistor 4. Outdoor air thermistor 3.12.2 Detection of Overload Over Current Outline In order to protect the inverter, detect an excessive output current, and for protecting...
Page 56: Forced Operation Mode
SiBE04-824 Control Specification 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 allowing conditions and not in the 3-minute stand-by mode. 2) The operating mode of the outdoor unit is the stop mode.
Page 57: Facility Setting Jumper (Cooling At Low Outdoor Temperature)
Control Specification SiBE04-824 3.15 Facility Setting Jumper (cooling at low outdoor temperature) Outline This function is limited only for facilities (the target of air conditioning is equipment (such as computer)). Never use it in a residence or office (the space where there is a human). Detail 25/35 class You can expand the operation range to –15°C by cutting jumper 8 (J8) on the PCB.
Page 58: Part 5 Operation Manual
SiBE04-824 Part 5 Operation Manual 1. System Configuration................48 2. Instruction....................49 2.1 Safety precautions..................49 2.2 Name of Parts ..................51 2.3 Preparation Before Operation ..............54 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........57 2.5 Adjusting the Airflow Direction..............59 2.6 POWERFUL Operation ................61 2.7 OUTDOOR UNIT QUIET Operation............62 2.8 ECONO Operation .................63...
Page 59: System Configuration
System Configuration SiBE04-824 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 60: 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. • The refrigerant used in the air conditioner is safe. Although leaks should not occur, if for some reason any refrigerant happens to leak into the room, make sure it does not come in contact with any flame as of gas heaters, kerosene heaters or gas range.
Page 61: Installation Site
Instruction SiBE04-824 • Do not block air inlets nor outlets. Impaired air flow may result in insufficient performance or trouble. • Do not stand or sit on the outdoor unit. Do not place any object on the unit to avoid injury, do not remove the fan guard. •...
Page 62: Name Of Parts
SiBE04-824 Instruction Name of Parts Names of parts Indoor Unit ON/OFF Operation Manual...
Page 63 Instruction SiBE04-824 Outdoor Unit Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: (page 10.) • Push this switch once to start operation. 2. Titanium Apatite Photocatalytic Push once again to stop it. Air-Purifying Filter: • The operation mode refers to the following •...
Page 64: Remote Controller
SiBE04-824 Instruction Remote Controller ECONO ON/OFF TEMP POWERFUL MODE SWING QUIET COMFORT SENSOR CANCEL TIMER < > ARC433B61, 62 1. Signal transmitter: 8. QUIET button: OUTDOOR UNIT QUIET • It sends signals to the indoor unit. operation (page 15.) 9. FAN setting button: 2.
Page 65: Preparation Before Operation
Instruction SiBE04-824 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 (LR03·AAA). 3. Set the front cover as before. ATTENTION About batteries •...
Page 66 SiBE04-824 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 control- ler, such as a curtain, the unit will not operate. •...
Page 67 Instruction SiBE04-824 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 ECONO ON/OFF increases or decreases the time display. TEMP POWERFUL 3.
Page 68: Auto · Dry · Cool · Heat · Fan Operation
SiBE04-824 Instruction AUTO · DRY · COOL · HEAT · FAN 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 69 Instruction SiBE04-824 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 airflow rate setting is not variable.
Page 70: Adjusting The Airflow Direction
SiBE04-824 Instruction Adjusting the Airflow Direction Adjusting the Airflow Direction You can adjust the airflow direction to increase your comfort. To adjust the horizontal blades (flaps) 1. Press “SWING button”. • “ ” is displayed on the LCD and the flaps will begin to swing.
Page 71 Instruction SiBE04-824 To start COMFORT AIRFLOW operation 3. Press “COMFORT AIRFLOW button”. • The flap position 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 72: Powerful Operation
SiBE04-824 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 20minutes. Then the system automatically operates ECONO ON/OFF again with the previous settings which were...
Page 73: Outdoor Unit Quiet Operation
Instruction SiBE04-824 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 conve- nient during night. To start OUTDOOR UNIT QUIET operation 1.
Page 74: Econo Operation
SiBE04-824 Instruction ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by lowering the maximum power con- sumption value. To start ECONO operation 1. Press “ECONO button” . • “ ” is displayed on the LCD. To cancel ECONO opera- tion 2.
Page 75: Intelligent Eye Operation
Instruction SiBE04-824 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 ECONO ON/OFF INTELLIGENT EYE TEMP...
Page 76 SiBE04-824 Instruction INTELLIGENT EYE Operation “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 airflow rate slightly in fan operation. (In FAN mode only) Notes on “INTELLIGENT EYE”...
Page 77: Timer Operation
Instruction SiBE04-824 2.10 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 78 SiBE04-824 Instruction TIMER Operation 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 ECONO point you like.
Page 79: Care And Cleaning
Instruction SiBE04-824 2.11 Care and Cleaning Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. Front panel 1.
Page 80: Air Filter
SiBE04-824 Instruction Filters 1. Open the front panel. (page 23.) 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the Titanium Apatite Photocatalytic Air-Purifying Filter.
Page 81: Before A Long Idle Period
Instruction SiBE04-824 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 82: Troubleshooting
SiBE04-824 Instruction 2.12 Troubleshooting 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 83 Instruction SiBE04-824 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 84: Disposal Requirements
SiBE04-824 Instruction 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 85 Instruction SiBE04-824 Operation Manual...
Page 86: Part 6 Service Diagnosis
SiBE04-824 Part 6 Service Diagnosis 1. Caution for Diagnosis................76 2. Problem Symptoms and Measures ............77 3. Service Check Function ................78 4. Troubleshooting ..................81 4.1 Error Codes and Description ..............81 4.2 Indoor Unit PCB Abnormality ..............82 4.3 Freeze-up Protection Control or High Pressure Control......83 4.4 Fan Motor (DC Motor) or Related Abnormality........85 4.5 Thermistor or Related Abnormality (Indoor Unit)........87 4.6 Signal Transmission Error (between Indoor and Outdoor Unit) .....88...
Page 87: Caution For Diagnosis
Caution for Diagnosis SiBE04-824 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 88: Problem Symptoms And Measures
SiBE04-824 Problem Symptoms and Measures Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page None of the Units Check the power supply. Check to make sure that the rated voltage is — Operates. supplied. Check the type of the indoor units. Check to make sure that the indoor unit type is —...
Page 89: Service Check Function
Service Check Function SiBE04-824 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 90 SiBE04-824 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 91 Service Check Function SiBE04-824 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 92: Troubleshooting
SiBE04-824 Troubleshooting Troubleshooting Error Codes and Description Reference Code Indication Description Page System — Normal U0★ Insufficient gas Over-voltage detection Signal transmission error (between indoor and outdoor unit) Unspecified voltage (between indoor and outdoor unit) Indoor Indoor unit PCB abnormality Unit Freeze-up protection control or high pressure control Fan motor or related abnormality...
Page 93: Indoor Unit Pcb Abnormality
Troubleshooting SiBE04-824 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 94: Freeze-Up Protection Control Or High Pressure Control
SiBE04-824 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 95 Troubleshooting SiBE04-824 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Check the air passage. Refer to P.130 Is there any short-circuit? Provide sufficient air passage. Check the intake air filter. Is it very dirty? Clean the air filter.
Page 96: Fan Motor (Dc Motor) Or Related Abnormality
SiBE04-824 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 97 Troubleshooting SiBE04-824 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 Refer to P.128 and rotate fan by hand. Does fan rotate Replace fan motor. smoothly? Turn power ON and operate fan.
Page 98: Thermistor Or Related Abnormality (Indoor Unit)
SiBE04-824 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 99: Signal Transmission Error (Between Indoor And Outdoor Unit)
Troubleshooting SiBE04-824 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 100 SiBE04-824 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check the indoor unit-outdoor unit Check No.10 connection wires. Refer to P.132 Is there any wiring error? Correct the indoor unit-outdoor unit connection wires.
Page 101: Unspecified Voltage (Between Indoor And Outdoor Units)
Troubleshooting SiBE04-824 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 102: Outdoor Unit Pcb Abnormality
SiBE04-824 Troubleshooting Outdoor Unit PCB Abnormality 4.8.1 25/35 Class Remote Controller Display Method of The system follows the microprocessor program to make sure it runs normally. Malfunction The system checks to see if the zero-cross signal comes in properly. Detection Malfunction The microprocessor program runs out of control.
Page 103 Troubleshooting SiBE04-824 4.8.2 50 Class 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 Out of control of microcomputer caused by external factors...
Page 104: Ol Activation (Compressor Overload)
SiBE04-824 Troubleshooting 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 105: Compressor Lock
Troubleshooting SiBE04-824 4.10 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 25/35 class The system judges the compressor lock, and stops due to over current. Decision The system judges the compressor lock, and cannot operation with position detection within Conditions...
Page 106: Dc Fan Lock
SiBE04-824 Troubleshooting 4.11 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 107: Input Over Current Detection
Troubleshooting SiBE04-824 4.12 Input Over Current Detection 4.12.1 25/35 Class Remote Controller Display Method of An input over-current is detected by checking the input current value with the compressor running. Malfunction Detection Malfunction The following current with the compressor running continues for 2.5 seconds. Cooling / Heating: Above 9.25A Decision Conditions...
Page 108 SiBE04-824 Troubleshooting 4.12.2 50 Class Remote Controller Display Method of An input over-current is detected by checking the input current value being detected by CT with the compressor running. Malfunction Detection Malfunction The following CT input with the compressor running continues for 2.5 seconds. CT input : Above 20 A Decision The system will be shut down if the error occurs 16 times.
Page 109 Troubleshooting SiBE04-824 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 ∗ An input over-current may result from wrong internal wiring. If the wires have been disconnected and reconnected for part replacement, for example, and the system is interrupted by an input over-current, Refer to P.131 check the wires again.
Page 110: Four Way Valve Abnormality
SiBE04-824 Troubleshooting 4.13 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 111 Troubleshooting SiBE04-824 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.129 Four way valve coil Correct. disconnected (loose)? Check No.06 Refer to P.130 Harness out of connector? Reconnect.
Page 112: Discharge Pipe Temperature Control
SiBE04-824 Troubleshooting 4.14 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 25/35 class If a stop takes place 4 times successively due to abnormal discharge pipe temperature, the Decision system will be shut down.
Page 113 Troubleshooting SiBE04-824 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.128 Malfunctioning Check No. 06 Replace the defective Check the thermistors. Discharge pipe thermistor thermistor.
Page 114: High Pressure Control In Cooling
SiBE04-824 Troubleshooting 4.15 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 115 Troubleshooting SiBE04-824 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.128 Check the installation space. Check No.06 Check No. 07 Abnormal Change the air outlet grille Check the installation Refer to P.130 position.
Page 116: Compressor System Sensor Abnormality
SiBE04-824 Troubleshooting 4.16 Compressor System Sensor Abnormality 4.16.1 25/35 Class 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 117 Troubleshooting SiBE04-824 4.16.2 50 Class Remote Controller Display Method of Fault condition is identified by the supply voltage and the DC voltage which is detected before the compressor startup. Malfunction Fault condition is identified by compressor current which is detected right after the Detection compressor startup.
Page 118 SiBE04-824 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn off the power Reactor connection check Connection OK? Connect properly. Compressor connection check Connection OK? Connect properly. Disconnect the reactor from the outdoor unit PCB and measure the resistance Reactor check...
Page 119: Position Sensor Abnormality
Troubleshooting SiBE04-824 4.17 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 120: Dc Voltage / Current Sensor Abnormality
SiBE04-824 Troubleshooting 4.18 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 121: Ct Or Related Abnormality
Troubleshooting SiBE04-824 4.19 CT or Related Abnormality Remote Controller Display Method of A CT or related error is detected by checking the compressor running frequency and CT- Malfunction detected input current. Detection Malfunction The compressor running frequency is below 55 Hz and the CT input is below 0.1 V. (The input current is also below 0.5 A.) Decision If this error repeats 4 times, the system will be shut down.
Page 122 SiBE04-824 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.12 Turn off the power and turn it on Refer to P.133 again. Get the system started. ∗...
Page 123: Thermistor Or Related Abnormality (Outdoor Unit)
Troubleshooting SiBE04-824 4.20 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 124 SiBE04-824 Troubleshooting 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.130 Error displayed Reconnect. again on remote controller? Connector or thermistor Reconnect.
Page 125: Electrical Box Temperature Rise
Troubleshooting SiBE04-824 4.21 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 (95°C ). (Reset is made when the temperature drops below 70°C (80°C ).) Decision : value for 50 class...
Page 126 SiBE04-824 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 WARNING Turn off the power and turn it on Refer to P.130 again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises above 80˚C (95˚C ) and stops itself...
Page 127: Radiation Fin Temperature Rise
Troubleshooting SiBE04-824 4.22 Radiation Fin Temperature Rise 4.22.1 25/35 Class Remote Controller Display Method of A radiation fin temperature rise is detected by checking the radiation fin thermistor with the compressor on. Malfunction 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 128 SiBE04-824 Troubleshooting Troubleshooting Be sure to turn off power switch before WARNING Caution connect or disconnect connector, or Check No.06 To cool down the electricals, the parts damage may be occurred. outdoor unit fan gets started when Refer to P.130 (Precaution before turning on the power again) the radiation fin temperature rises above 75˚C even when the air...
Page 129 Troubleshooting SiBE04-824 4.22.2 50 Class Remote Controller Display Method of A radiation fin temperature rise is detected by checking the radiation fin thermistor with the compressor on. Malfunction Detection Malfunction If the radiation fin temperature with the compressor on is above 105°C, The error is cleared when the temperature drops below 99°C.
Page 130 SiBE04-824 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 Turn off the power and turn it on Refer to P.131 again to get the system started. Check No.09 Refer to P.132 Error displayed again?
Page 131: Output Over Current Detection
Troubleshooting SiBE04-824 4.23 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 132 SiBE04-824 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and Refer to P.131 reconnected for part replacement, for example, and the system is interrupted by an output over-current, take the following procedure.
Page 133: Insufficient Gas
Troubleshooting SiBE04-824 4.24 Insufficient Gas 4.24.1 25/35 Class Remote Controller Display Method of Gas shortage detection I: Gas shortage is detected by checking the input current value and the compressor running Malfunction 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 134 SiBE04-824 Troubleshooting 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.128 Any thermistor Replace in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor * Room temperature thermistor Check No.06 * Outdoor air thermistor...
Page 135 Troubleshooting SiBE04-824 4.24.2 50 Class Remote Controller Display Method of Gas shortage detection I : A gas shortage is detected by checking the CT-detected input current value and the Malfunction compressor running frequency. Detection Gas shortage detection II : A gas shortage is detected by checking the difference between indoor unit heat exchanger temperature and room temperature as well as the difference between outdoor unit heat exchanger temperature and room temperature.
Page 136 SiBE04-824 Troubleshooting 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.128 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor * Room temperature thermistor Check No.06 * Outdoor air thermistor...
Page 137: Over-Voltage Detection
Troubleshooting SiBE04-824 4.25 Over-voltage Detection Remote Controller Display Method of An abnormal voltage rise is detected by checking the specified over-voltage detection circuit. Malfunction Detection Malfunction 25/35 class An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer Decision (The voltage is over 400V).
Page 138: Signal Transmission Error (On Outdoor Unit Pcb)
SiBE04-824 Troubleshooting 4.26 Signal Transmission Error (on Outdoor Unit PCB) Remote Controller Display Method of Communication error between microcomputer mounted on the main PCB 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 Decision Fault counter is reset when the data from the PM1 can be successfully received.
Page 139: Check
Check SiBE04-824 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 140: Sibe04
SiBE04-824 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 141: Thermistor Resistance Check
Check SiBE04-824 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 142: Installation Condition Check
SiBE04-824 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 143: Outdoor Unit Fan System Check
Check SiBE04-824 5.1.7 Outdoor Unit Fan System Check Check No.09 DC motor Check the outdoor unit fan system. Fan motor lead wire connector Outdoor unit fan running? Reconnect. disconnected? Outdoor unit fan system Go to Check No. 15. functioning. (R7159) 5.1.8 Power Supply Waveforms Check Check No.10...
Page 144: Capacitor Voltage Check
SiBE04-824 Check 5.1.10 Capacitor Voltage Check Check No.12 Before this checking, be sure to check the main circuit for short-circuit. Checking the capacitor voltage With the circuit breaker still on, measure the voltage according to the drawing of the model in question.
Page 145 Check SiBE04-824 Tester's negative terminal Power transistor Power transistor (–) Power transistor Power transistor Tester's positive terminal (–) Normal resistance Several kΩ to several MΩ 0 or ∞ Abnormal resistance (R5237) Service Diagnosis...
Page 146: Main Circuit Electrolytic Capacitor Check
SiBE04-824 Check 5.1.12 Main Circuit Electrolytic Capacitor Check Check No.14 Checking the main circuit electrolytic capacitor Never touch any live parts for at least 10 minutes after turning off the circuit breaker. If unavoidably necessary to touch a live part, make sure there is no DC voltage using the tester.
Page 147 Check SiBE04-824 Service Diagnosis...
Page 148: Part 7 Removal Procedure
SiBE04-824 Part 7 Removal Procedure 1. Indoor Unit...................138 1.1 Removal of Air Filter................138 1.2 Removal of Front Panel................140 1.3 Removal of Front Grille ................142 1.4 Removal of Horizontal Blades and Vertical Blades ......145 1.5 Removal of Electrical Box ..............148 1.6 Removal of PCB...................151 1.7 Removal of Drain Pan Unit ..............157 1.8 Removal of Fan Motor................161 1.9 Removal of Heat Exchanger ..............163...
Page 149: Indoor Unit
Indoor Unit SiBE04-824 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. Appearance feature Warning Dangerous: High voltage A high voltage is applied to all the electric circuits of this product including thermistors.
Page 150 SiBE04-824 Indoor Unit Step Procedure Points 3. Removing the titanium apatite photocatalytic air- purifying filter The titanium apatite The titanium apatite photocatalytic air- photocatalytic air-purifying Air filter purifying filter is filter is not marked for attached to the back of difference between the right the air filter.
Page 151: Removal Of Front Panel
Indoor Unit SiBE04-824 Removal of Front Panel Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the front panel Put your fingers on the right and left projections of the front panel, and open the panel over the position where it will...
Page 152 SiBE04-824 Indoor Unit Step Procedure Points Remove the front panel. Caution on Mounting When mounting the front panel, fit the right and left rotary shafts one by one into the grooves and fully push them in position. (R4316) Removal Procedure...
Page 153: Removal Of Front Grille
Indoor Unit SiBE04-824 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. Removing the service cover Remove the screw of Preparation the service cover. Remove the front panel according to the “Removal of Front Panel.”...
Page 154 SiBE04-824 Indoor Unit Step Procedure Points Remove the screw covers (one each at the right and left). (R4321) Remove the screws When installing the indoor (one each at the right unit, drive the screws with and left). the horizontal blades open or removed.
Page 155 Indoor Unit SiBE04-824 Step Procedure Points Put your fingers into the front grille and lift the grille up to unfasten the centre hook. (R4325) Unfasten the right hook also by putting your fingers into the grille and lifting it. (R4326) Remove the front grille Caution on Mounting by tilting the upper part...
Page 156: Removal Of Horizontal Blades And Vertical Blades
SiBE04-824 Indoor Unit Removal of Horizontal Blades Vertical Blades Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the horizontal blade (large) Open the horizontal Cautions on Mounting blade (large).
Page 157 Indoor Unit SiBE04-824 Step Procedure Points 2. Removing the horizontal blade (small) Remove the horizontal blade (small) while bending the fixed part at the centre slightly. Unfasten the left side. Unfasten the key type fixing shaft at the right side. Removal Procedure...
Page 158 SiBE04-824 Indoor Unit Step Procedure Points 3. Removing the vertical blade Unfasten the hooks at the shaft mounting part by pressing them with a flat screwdriver. Unfasten the hooks at the upper 2 positions. Remove the vertical Six vertical blades are blade toward yourself.
Page 159: Removal Of Electrical Box
Indoor Unit SiBE04-824 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 The figure shows the Preparation connections of wire Remove the front grille harnesses.
Page 160 SiBE04-824 Indoor Unit Step Procedure Points Remove the drip proof Put any excess wires behind plate by removing the the power supply lead wire. screw. Replace the heat exchanger thermistor. Use care not to lose the retainer of thermistor. Heat exchanger Retainer of thermistor thermistor...
Page 161 Indoor Unit SiBE04-824 Step Procedure Points Release the hook at the upper far side by pressing it from above and pulling the box toward yourself. Lift up the electrical box There is a hook also at the and pull it toward lower part of the back.
Page 162: Removal Of Pcb
SiBE04-824 Indoor Unit 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. Removing the shelter The figure shows the Preparation appearance of the Remove the electrical box electrical box.
Page 163 Indoor Unit SiBE04-824 Step Procedure Points 3. Removing the terminal strip board Dismount the terminal board by removing the screw. 4. Removing the signal receiver unit Remove the signal receiver unit by unfastening the hooks (one each at the right and left).
Page 164 SiBE04-824 Indoor Unit Step Procedure Points Remove the electrical box by sliding it to the left. Disconnect the wire harness. 5. Removing the signal receiver PCB Remove the signal receiver PCB by opening the hooks at 3 positions. Disconnect the connector from the signal receiver PCB.
Page 165 Indoor Unit SiBE04-824 Step Procedure Points 6. Removing the INTELLIGENT EYE PCB Remove the INTELLIGENT EYE INTELLIGENT EYE fixing plate by twisting it fixing plate clockwise. (R4363) Remove the INTELLIGENT EYE PCB by unfastening the hook. Hook (R4364) Disconnect the connector from the INTELLIGENT EYE PCB.
Page 166 SiBE04-824 Indoor Unit Step Procedure Points 7. Removing the display The figure shows the connection of wire harness for the display PCB. Remove the display PCB by unfastening the 2 hooks. Disconnect the connector from the display PCB. 8. Removing the control PCB Dismount the control PCB by removing the 2...
Page 167 Indoor Unit SiBE04-824 Step Procedure Points Lift up the bottom of the When mounting the control control PCB and pull it PCB, make sure that it is out. fixed by upper hooks. The figures show the Lead-free solder (PbF) is names of the PCB used for the PCB.
Page 168: Removal Of Drain Pan Unit
SiBE04-824 Indoor Unit Removal of Drain Pan Unit Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points 1. Removing the drain pan Preparation unit Remove the electrical box according to the “Removal Lift up the indoor unit of Electrical Box.”...
Page 169 Indoor Unit SiBE04-824 Step Procedure Points Remove the drain pan Caution on Mounting toward yourself from Make sure that the hook at the indoor unit body. the left side is fitted in the groove. 2. Removing the swing motor Remove the screw of the swing motor.
Page 170 SiBE04-824 Indoor Unit Step Procedure Points 3. Removing the crank assembly Remove the screw of the crank assembly. Remove the crank assembly by unfastening the hook. The figure shows the position of the hook when the crank assembly has been removed.
Page 171 Indoor Unit SiBE04-824 Step Procedure Points Remove the drain cap located at the left side of the drain pan unit. Insert the drain hose to the left side. Press the removed Use a 4mm Allen wrench. drain plug into the right side with an Allen Caution wrench (4mm).
Page 172: Removal Of Fan Motor
SiBE04-824 Indoor Unit Removal of Fan Motor Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points Undo the fan motor Preparation lead wires from the Remove the drain pan unit hooks.
Page 173 Indoor Unit SiBE04-824 Step Procedure Points Unfasten the hook (a) of the fan motor fixing plate with your thumb. Unfasten the hook (c). Remove the fan motor. Removal Procedure...
Page 174: Removal Of Heat Exchanger
SiBE04-824 Indoor Unit Removal of Heat Exchanger Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points 1. Disconnecting the Preparation refrigerant pipe Remove the drain pan unit according to the “Removal Remove the screws of Drain Pan Unit.”...
Page 175 Indoor Unit SiBE04-824 Step Procedure Points 2. Removing the indoor unit Remove the indoor unit from the installation plate. 3. Removing the heat exchanger Unfasten the hook of the pipe fixing plate at the back of the unit and pull out the pipe. Widen the auxiliary pipe by about 10-20 degrees.
Page 176 SiBE04-824 Indoor Unit Step Procedure Points After unfastening the When mounting the heat lower hooks, hold up exchanger, make sure that the heat exchanger by the hook (left) is fastened. its left side and lift it up toward yourself. When the left side is lifted, the hook at the right side comes off position.
Page 177: Removal Of Fan Rotor
Indoor Unit SiBE04-824 1.10 Removal of Fan Rotor Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points 1. Removing the drip proof Preparation plate Remove the heat exchanger according to the “Removal of Heat Exchanger.”...
Page 178 SiBE04-824 Indoor Unit Step Procedure Points Unfasten the hook (a) of the fan motor fixing plate with your thumb and unfasten the hook (b). The fan motor fixing plate can be removed from the unit when the hook (c) is unfastened. 2.
Page 179 Indoor Unit SiBE04-824 Step Procedure Points 3. Removing the bearing Remove the screw of the drip proof plate (left). The drip proof plate can be removed when the hooks at 2 positions are unfastened. Press the rubber-made bearing with force from outside.
Page 180: Outdoor Unit
SiBE04-824 Outdoor Unit 2. Outdoor Unit ARXS 25/35 F 2.1.1 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...
Page 181 Outdoor Unit SiBE04-824 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 discharge grille. (R7192) The discharge grille has 4 hooks.
Page 182 SiBE04-824 Outdoor Unit 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 183 Outdoor Unit SiBE04-824 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 184 SiBE04-824 Outdoor Unit 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 185 Outdoor Unit SiBE04-824 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 186 SiBE04-824 Outdoor Unit 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 187 Outdoor Unit SiBE04-824 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 188 SiBE04-824 Outdoor Unit 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 189 Outdoor Unit SiBE04-824 2.1.2 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.
Page 190 SiBE04-824 Outdoor Unit Step Procedure Points Disconnect the connector for overload protector (S40). (R7217) Disconnect the connector for electronic expansion valve coil (S20). (R7218) Disconnect the connector for four way valve coil (S80). (R7219) Removal Procedure...
Page 191 Outdoor Unit SiBE04-824 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 192 SiBE04-824 Outdoor Unit Step Procedure Points Lift and remove the Electrical Box electrical box. (R7223) Removal Procedure...
Page 193 Outdoor Unit SiBE04-824 2.1.3 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.
Page 194 SiBE04-824 Outdoor Unit 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 195: Removal Of Sound Blanket
Outdoor Unit SiBE04-824 2.1.4 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 196 SiBE04-824 Outdoor Unit 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 197: Removal Of Four Way Valve
Outdoor Unit SiBE04-824 2.1.5 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.
Page 198 SiBE04-824 Outdoor Unit 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 199 Outdoor Unit SiBE04-824 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 200: Removal Of Compressor
SiBE04-824 Outdoor Unit 2.1.6 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 201 Outdoor Unit SiBE04-824 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 202 SiBE04-824 Outdoor Unit 2.1.7 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 203 Outdoor Unit SiBE04-824 Step Procedure Points Loosen the 4 screws. Screws (R7258) Undo the 3 hooks on the upper side. (R7259) Lift and pull out the PCB. Removal Procedure...
Page 204 SiBE04-824 Outdoor Unit 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 205: Arxs 50 E
Outdoor Unit SiBE04-824 ARXS 50 E 2.2.1 Removal of the Panels and Plates Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the panels and plates.
Page 206 SiBE04-824 Outdoor Unit Step Procedure Points The front grille has 4 hooks. Slide the discharge grille upwards and remove it. Loosen the 6 screws of front panel. Push the front panel and undo the hooks. Lift the clamp plate remove it. Removal Procedure...
Page 207 Outdoor Unit SiBE04-824 Step Procedure Points Undo the left side Lift the front panel and hooks, and then the remove it while pushing the right side hook. left side panel inwards. Remove the front panel. Lift the front panel and undo the right side hook.
Page 208 SiBE04-824 Outdoor Unit Step Procedure Points 2. Remove the stop valve cover. Loosen the screw of the stop valve cover. Pull down the stop valve cover to undo the hooks and remove it. The stop valve cover has 6 hooks. (R5254) Removal Procedure...
Page 209 Outdoor Unit SiBE04-824 2.2.2 Removal of the Fan Motor / Propeller Fan 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 and the front panel. Shelter 1.
Page 210 SiBE04-824 Outdoor Unit Step Procedure Points 2. Remove the motor. Disconnect the connector for fan motor (S70). Removal Procedure...
Page 211 Outdoor Unit SiBE04-824 Step Procedure Points The illustration shows arrangement of the fan motor lead wire. Unscrew the washer- fitted nut (M10) of the propeller fan with a spanner. Align mark of the propeller fan with D-cut section of the motor shaft when reassembling.
Page 212 SiBE04-824 Outdoor Unit Step Procedure Points Remove the 4 screws from the fan motor. Pull the fan motor out. Put the lead wire through the back of the motor when reassembling (so as not to be entangled with the propeller fan). (R5265) Removal Procedure...
Page 213: Removal Of The Electrical Box
Outdoor Unit SiBE04-824 2.2.3 Removal of the 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 and the front panel. 1. Remove the shield plate.
Page 214 SiBE04-824 Outdoor Unit Step Procedure Points Disconnect the 2 earth wires. Loosen the 3 screws of the right side panel. Loosen the fixing screw of the electrical box. Removal Procedure...
Page 215 Outdoor Unit SiBE04-824 Step Procedure Points Insert the 2 hooks of the lower part and the 1 hook of the upper back when Hook reassembling. (R5272) Hooks (R5273) Disconnect the connectors of the front side. S20: electronic expansion valve S40: overload protector S80: four way valve S90: thermistors (discharge pipe,...
Page 216 SiBE04-824 Outdoor Unit Step Procedure Points Release the clamp and undo the wire from the hook. Lift the electrical box and remove it. Removal Procedure...
Page 217: Removal Of The Pcb
Outdoor Unit SiBE04-824 2.2.4 Removal of the 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 PCB. Disconnect the connectors for the control PCB (S52, S102).
Page 218 SiBE04-824 Outdoor Unit Step Procedure Points Undo the hook on the right. Open the cable way board. Disconnect the 1: Black harnesses. 2: White 3: Red L1: Black L2: Brown N1: White N2: Blue Disconnect the 2 harnesses for the reactor (HR1, HR2).
Page 219 Outdoor Unit SiBE04-824 Step Procedure Points Loosen the 3 fixing screws for the main PCB. Undo the 4 hooks. Lift up and remove the PCB. Removal Procedure...
Page 220: Removal Of The Sound Blanket
SiBE04-824 Outdoor Unit 2.2.5 Removal of the 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 sound blanket (back). Remove the sound Since the piping ports on the blanket (outer).
Page 221 Outdoor Unit SiBE04-824 Step Procedure Points Remove the sound blanket (top-lower). Remove the sound Since the piping ports on the blanket (inner). sound blanket (inner) are torn easily, remove the blanket carefully. Release the discharge Pay attention to the direction pipe thermistor.
Page 222: Removal Of The Four Way Valve
SiBE04-824 Outdoor Unit 2.2.6 Removal of the 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 Remove the electronic The illustration is for heat expansion valve coil.
Page 223 Outdoor Unit SiBE04-824 Step Procedure Points Heat up every brazed In case of the difficulty with part in turn and gas brazing machine disconnect. 1. Disconnect the brazed part where is easy to disconnect and restore. 2. Cut pipes on the main unit by a miniature copper tube cutter in order to make it easy to disconnect.
Page 224: Removal Of The Compressor
SiBE04-824 Outdoor Unit 2.2.7 Removal of the Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover. Disconnect the lead Be careful so as not to burn wires of the the compressor terminals or compressor.
Page 225 Outdoor Unit SiBE04-824 Step Procedure Points Release the clamp by pliers to detach the wire harness for the compressor. Remove the putty. The illustration is for 50 class heat pump models as representative. Before working, make sure that the refrigerant is empty in the circuit.
Page 226 SiBE04-824 Outdoor Unit Step Procedure Points Unscrew the nut of the compressor. Before working, Warning make sure that the Ventilate when refrigerant refrigerant is empty leaks during the work. in the circuit. (If refrigerant contacts fire, it Be sure to apply will cause to arise toxic gas.) nitrogen replacement when...
Page 227 Outdoor Unit SiBE04-824 Removal Procedure...
Page 228: Part 8 Others
SiBE04-824 Part 8 Others 1. Others ....................218 1.1 Test Run from the Remote Controller ..........218 1.2 Jumper Settings ...................219 1.3 Application of Silicon Grease to a Power Transistor and a Diode Bridge..................220 Others...
Page 229: Others
Others SiBE04-824 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 230: Jumper Settings
SiBE04-824 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 231: Application Of Silicon Grease To A Power Transistor And A Diode Bridge
Others SiBE04-824 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 232: Part 9 Appendix
SiBE04-824 Part 9 Appendix 1. Piping Diagrams..................222 1.1 Indoor Units ..................222 1.2 Outdoor Units ..................223 2. Wiring Diagrams..................224 2.1 Indoor Units ..................224 2.2 Outdoor Units ..................225 Appendix...
Page 233: Piping Diagrams
Piping Diagrams SiBE04-824 1. Piping Diagrams Indoor Units ATXS25/35EV1B7 INDOOR UNIT MAFFLER ASSY HEAT EXCHANGER 7.0CuT 6.4CuT THERMISTOR 6.4CuT ON HEAT EXCH. 6.4CuT CROSS FLOW FAN FIELD PIPING ( 6.4CuT ) FAN MOTOR 9.5CuT FIELD PIPING ( 9.5CuT ) REFRIGERANT FLOW COOLING HEATING 4D047912J...
Page 234: Outdoor Units
SiBE04-824 Piping Diagrams Outdoor Units ARXS25/35F3V1B OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER 7.0CuT THERMISTOR 7.0CuT HEAT EXCHANGER MOTOR OPERATED THERMISTOR VALVE 4.8CuT 6.4CuT 6.4CuT 4.8CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER WITH FILTER FOUR WAY FIELD PIPING VALVE ON : HEATING ( 6.4CuT )
Page 235: Wiring Diagrams
Wiring Diagrams SiBE04-824 2. Wiring Diagrams Indoor Units ATXS25/35EV1B7 FIELD WIRING. PCB3 PCB1 ∼ ∼ RECTIFIER LED1 3.15A OUTDOOR LED2 CAUTION LED3 TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
Page 236: Outdoor Units
SiBE04-824 Wiring Diagrams Outdoor Units ARXS25/35F3V1B R12T t ° C100 FIELD WIRING. indoor PCB1 MRM20 IPM1 MRM10 3.15A IC11 3.15A PCB2 MRCW outdoor NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. t ° t ° t ° C74 , C75 IN CASE OF IN CASE OF C94 , C95 , C100...
Page 237 Wiring Diagrams SiBE04-824 Appendix...
Page 238: Index
SiBE04-824 Index Numerics clamp plate ............195 comfort airflow mode ..........18 00 ................81 compressor ..........189, 213 3-minute standby ..........29, 35 compressor lock ............ 94 compressor motor ..........178 compressor overload ..........93 A1 ................82 compressor protection function ......35 A5 ................83 compressor system sensor abnormality ....
Page 239 SiBE04-824 E8 ..............96, 97 H6 ................ 108 EA ..............99 H8 ..............109, 110 F3 ..............101 H9 ................ 112 F6 ..............103 HA ..............8, 156 H0 ............105, 106 Hall IC ............. 19, 85 H6 ..............108 HC3 ............... 10 H8 ............109, 110 HC4 ...............
Page 240 SiBE04-824 S101 ..............12 S102 .............. 12, 206 name of parts ............51 S11 ................ 10 NIGHT SET mode ..........23 S20 ..........10, 12, 179, 204 S21 ..............8, 156 S26 ..............8, 156 OL activation ............93 S27 ................8 ON/OFF button on indoor unit ........28 S28 ..............
Page 241 SiBE04-824 thermistor or related abnormality (outdoor unit) ...112 thermistor resistance check .........130 thermostat control ..........22 TIMER operation ............66 titanium apatite photocatalytic air-purifying filter ..28 top panel ............170, 194 troubleshooting ..........71, 81 troubleshooting with LED indication .......76 turning speed pulse input on the outdoor unit PCB check .............135 U0 ..............122, 124 U2 .................126...
Page 242 SiBE04-824 Drawings & Flow Charts insufficient gas control ........... 44 INTELLIGENT EYE ..........25 ARC433 series ............78 INTELLIGENT EYE sensor PCB ......9 automatic airflow control ........19 inverter features ............ 17 automatic operation ..........21 inverter POWERFUL operation ......27 auto-swing ..............18 inverter units refrigerant system check ....
Page 243 SiBE04-824 target discharge pipe temperature control .....43 thermistor or related abnormality (indoor unit) ..87 thermistor or related abnormality (outdoor unit) ...112 thermistor resistance check .........130 thermostat control ..........22 trial operation from remote controller ....218 turning speed pulse input on the outdoor unit PCB check .....135 unspecified voltage (between indoor and outdoor units) ....90 wiring diagrams...
Page 244 Specifications, designs and other content appearing in this brochure are current as of February 2008 but subject to change without notice. SiBE 04-824 Printed in Japan 02/2008 B AK...

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