Daikin J Series Service Manual

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Service manual (268 pages)

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SiBE041012

Inverter Pair

Wall Mounted Type J-Series

[Applied Models]

Inverter Pair : Heat Pump

Table of Contents

Troubleshooting

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Summary of Contents for Daikin J Series

Page 1 SiBE041012 Inverter Pair Wall Mounted Type J-Series [Applied Models] Inverter Pair : Heat Pump...
Page 2 SiBE041012 Inverter Pair Wall Mounted Type J-Series Heat Pump Indoor Unit FTXG25JV1BW FTXG35JV1BW FTXG25JV1BS FTXG35JV1BS Outdoor Unit RXG25J2V1B RXG35J2V1B Table of Contents...
Page 3: Table Of Contents
SiBE041012 1. Introduction .....................v 1.1 Safety Cautions ..................v 1.2 Used Icons ....................ix Part 1 List of Functions ..............1 1. Functions....................2 Part 2 Specifications ..............3 1. Specifications ..................4 Part 3 Printed Circuit Board Connector Wiring Diagram ..... 6 1.
Page 4 SiBE041012 2. Operation Manual..................44 2.1 Name of Parts ..................44 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........48 2.3 Adjusting the Airflow Direction and Rate ..........50 2.4 COMFORT AIRFLOW Operation ............52 2.5 INTELLIGENT EYE Operation ...............53 2.6 POWERFUL Operation ................55 2.7 OUTDOOR UNIT QUIET Operation............56 2.8 ECONO Operation .................57 2.9 OFF TIMER Operation ................58...
Page 5 SiBE041012 1.2 Removal of Horizontal Blades ..............119 1.3 Removal of Front Grille ................121 1.4 Removal of Front Panel Mechanism ASSY..........124 1.5 Removal of Display Lens ASSY ............126 1.6 Removal of Reduction Motor / Limit Switch..........127 1.7 Removal of Fan Guard / Electrical Box ..........129 1.8 Removal of PCB...................132 1.9 Removal of Swing Motor ..............138 1.10 Removal of lndoor Heat Exchanger .............139...
Page 6: Introduction
Introduction SiBE041012 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 SiBE041012 Introduction Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m). Insufficient safety measures may cause a fall accident. In case of R-410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R-410A refrigerant.
Page 8 Introduction SiBE041012 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 SiBE041012 Introduction 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
Introduction SiBE041012 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: Part 1 List Of Functions
SiBE041012 Part 1 List of Functions 1. Functions....................2 List of Functions...
Page 12: Functions
Functions SiBE041012 1. Functions Category Functions Category Functions Basic Function Inverter (with Inverter Power Control) Health & Clean Air-Purifying Filter — –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — –15 Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
Page 13: Part 2 Specifications
SiBE041012 Part 2 Specifications 1. Specifications ..................4 Specifications...
Page 14: Specifications
Specifications SiBE041012 1. Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG25JV1BW FTXG25JV1BS Models RXG25J2V1B RXG25J2V1B Outdoor Unit 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)
Page 15 SiBE041012 Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG35JV1BW FTXG35JV1BS Models RXG35J2V1B RXG35J2V1B Outdoor Unit Cooling Heating Cooling Heating 3.5 (1.4 ~ 3.8) 4.0 (1.4 ~ 5.0) 3.5 (1.4 ~ 3.8) 4.0 (1.4 ~ 5.0) Capacity Btu/h 11,900 (4,800 ~ 13,000) 13,600 (4800 ~ 17,100)
Page 16: Part 3 Printed Circuit Board Connector Wiring Diagram
SiBE041012 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........7 1.1 Indoor Unit....................7 1.2 Outdoor Unit ...................10 Printed Circuit Board Connector Wiring Diagram...
Page 17: Printed Circuit Board Connector Wiring Diagram
SiBE041012 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit Connectors and PCB (1): Control PCB Other Parts 1) S21 Connector for centralized control (HA) 2) S25 Connector for INTELLIGENT EYE sensor PCB 3) S32 Connector for indoor heat exchanger thermistor 4) S41 Connector for swing motors...
Page 18 Printed Circuit Board Connector Wiring Diagram SiBE041012 PCB Detail PCB (1): Control PCB JB JC LED A S200 2P254830-1 Printed Circuit Board Connector Wiring Diagram...
Page 19 SiBE041012 Printed Circuit Board Connector Wiring Diagram PCB (2): Signal Receiver / Display PCB 3P254832-1 PCB (3): INTELLIGENT EYE Sensor PCB 3P255914-1 Printed Circuit Board Connector Wiring Diagram...
Page 20: Outdoor Unit
Printed Circuit Board Connector Wiring Diagram SiBE041012 Outdoor Unit Connectors and PCB(1): Filter PCB Other Parts 1) S11 Connector for main PCB 2) AC1, AC2, S Connector for terminal board 3) E1, E2 Terminal for earth 4) HL2, HN2 Connector for main PCB 5) HR1 Connector for reactor 6) FU1...
Page 21 SiBE041012 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Filter PCB E1, E2 (on main PCB) 3P254234-1 PCB(2): Main PCB U VW LED A S100 S50 2P254206-4 PCB(3): Forced Operation Button PCB S110 3P255755-1 Printed Circuit Board Connector Wiring Diagram...
Page 22: Part 4 Function And Control
SiBE041012 Part 4 Function and Control 1. Main Functions..................13 1.1 Frequency Principle................13 1.2 Operation Starting Control..............15 1.3 Airflow Direction Control.................16 1.4 Fan Speed Control for Indoor Units............17 1.5 Program Dry Operation ................18 1.6 Automatic Operation................19 1.7 Thermostat Control.................20 1.8 NIGHT SET Mode ..................21 1.9 ECONO Operation .................22 1.10 INTELLIGENT EYE Operation ...............23 1.11 Inverter POWERFUL Operation .............24...
Page 23: Main Functions
SiBE041012 Main Functions 1. Main Functions 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 target temperature Additional The target frequency is adapted by additional parameters in the following cases:...
Page 24 Main Functions SiBE041012 Inverter Features The inverter provides the following features: The regulating capacity can be changed according to the changes in the outdoor temperature and cooling / heating load. Quick heating and quick cooling The compressor rotational speed is increased when starting the heating (or cooling). This enables to reach the set temperature quickly.
Page 25: Operation Starting Control
SiBE041012 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 26: Airflow Direction Control
Main Functions SiBE041012 Airflow Direction Control Power-Airflow The large flaps send a large volume of air downwards to the floor. The flap provides an optimum control in cooling, dry, and heating mode. Dual Flaps Cooling / Dry Mode During cooling or dry mode, the flap retracts into the indoor unit. Then, cool air can be blown far and pervaded all over the room.
Page 27: Fan Speed Control For Indoor Units
SiBE041012 Main Functions Fan Speed Control for Indoor Units Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room temperature and the target temperature.
Page 28: Program Dry Operation
Main Functions SiBE041012 Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and fan adjustment buttons are inoperable in this mode. Detail The microcomputer automatically sets the temperature and airflow rate.
Page 29: Automatic Operation
SiBE041012 Main Functions Automatic Operation Outline Automatic Cooling / Heating Function When the AUTO mode is selected with the remote controller, the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start-up, and automatically operates in that mode. The unit automatically switches the operation mode to maintain the room temperature at the set temperature.
Page 30: Thermostat Control
Main Functions SiBE041012 Thermostat Control Thermostat control is based on the difference between the room temperature and the target temperature. Thermostat OFF Condition The temperature difference is in the zone A. Thermostat ON Condition The temperature difference returns to the zone C after being in the zone A. The system resumes from defrost control in any zones except A.
Page 31: Night Set Mode
SiBE041012 Main Functions NIGHT SET Mode Outline When the OFF timer is set, the NIGHT SET Mode is automatically activated. The NIGHT SET Mode keeps the airflow rate setting. Detail The NIGHT SET Mode continues operation at the target temperature for the first one hour, then automatically raises the target temperature slightly in the case of cooling, or lowers it slightly in the case of heating.
Page 32: Econo Operation
Main Functions SiBE041012 ECONO Operation Outline The "ECONO operation" reduces the maximum operating current and power consumption. This operation 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 33: Intelligent Eye Operation
SiBE041012 Main Functions 1.10 INTELLIGENT EYE Operation Outline 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 nobody in the room in order to save electricity.
Page 34: Inverter Powerful Operation
Main Functions SiBE041012 1.11 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. Detail When POWERFUL button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes.
Page 35 SiBE041012 Main Functions Brightness The brightness of the multi-colored indicator lamp can be adjusted L (low), H (high), or OFF. Setting 1. Press the center of the Temp button and the Mode button at the same time. (R11669) “ 5C ” is displayed on the LCD. (R11911) 2.
Page 36: Other Functions
Main Functions SiBE041012 1.12 Other Functions 1.12.1 Hot-Start Function In order to prevent the cold air blast that normally comes when heating operation is started, the temperature of the indoor heat exchanger is detected, and either the airflow is stopped or is made very weak thereby carrying out comfortable heating of the room.
Page 37: Function Of Thermistor
SiBE041012 Function of Thermistor 2. Function of Thermistor Four way valve Compressor (R11582) A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge pipe temperature. The system sets the target discharge pipe temperature according to the Exchanger outdoor and indoor heat exchanger temperature, and controls the electronic expansion valve Thermistor...
Page 38: Control Specification
Control Specification SiBE041012 3. Control Specification Mode Hierarchy Outline There are two modes; the one is the normal operation mode and the other is the forced operation mode for installation and providing service. Detail There are following modes; stop, cooling (includes drying), heating (include defrosting) Air conditioner control mode Forced operation mode Forced cooling (for Pump Down Operation)
Page 39: Frequency Control
SiBE041012 Control Specification Frequency Control Outline Frequency is determined according to the difference between the room temperature and the target temperature. The function is explained as follows. 1. How to determine frequency 2. Frequency command from the indoor unit (Difference between the room temperature and the target temperature) 3.
Page 40 Control Specification SiBE041012 Indoor Frequency Command ( ∆ D signal) The difference between the room temperature and the target temperature is taken as the “ ∆ D signal” and is used for frequency command. ∆D ∆D ∆D ∆D Temperature Temperature Temperature Temperature difference...
Page 41: Controls At Mode Changing / Start-Up
SiBE041012 Control Specification Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline The inverter operation in open phase starts with the conditions of the preheating command from the indoor unit, the outdoor temperature, and the discharge pipe temperature. Outdoor temperature ≥ 7°C → Control A Detail Outdoor temperature <...
Page 42: Discharge Pipe Temperature Control
Control Specification SiBE041012 3.3.4 3-minute Standby Turning on the compressor is prohibited 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 is set as follows. (The function is not activated when defrosting.) (Hz) FCG 1...
Page 43: Input Current Control
SiBE041012 Control Specification Input Current Control Outline The microcomputer calculates the input current during the compressor is running, and sets the frequency upper limit from the input current. In case of heat pump model, this control which is the upper limit control of the frequency takes priority to the lower limit of control of four way valve operation compensation.
Page 44: Freeze-Up Protection Control
Control Specification SiBE041012 Freeze-up Protection Control Outline During cooling operation, the signal sent from the indoor unit controls the operating frequency limitation and prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is divided into zones.) Detail The operating frequency limitation is judged with the indoor heat exchanger temperature.
Page 45: Outdoor Fan Control
SiBE041012 Control Specification Outdoor Fan Control 1. Fan OFF delay when stopped The outdoor fan is turned OFF 60 seconds after the compressor stops. 2. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF.
Page 46: Defrost Control
Control Specification SiBE041012 3.10 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish. Detail Conditions for Starting Defrost The starting conditions is determined with the outdoor temperature and the outdoor heat exchanger temperature.
Page 47: Electronic Expansion Valve Control
SiBE041012 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 48 Control Specification SiBE041012 3.11.1 Fully Closing with Power ON The electronic expansion valve is initialized when turning on the power. The opening position is set and the pressure equalization is developed. 3.11.2 Pressure Equalization Control When the compressor is stopped, the pressure equalization control is activated. The electronic expansion valve opens, and develops the pressure equalization.
Page 49 SiBE041012 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, the target discharge pipe temperature control is canceled and the target opening of the electronic expansion valve is changed according to the shift.
Page 50: Malfunctions
Control Specification SiBE041012 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. Radiation fin thermistor 4. Outdoor temperature thermistor 3.12.2 Detection of Overcurrent and Overload Outline An excessive output current is detected and, the OL temperature is observed to protect the compressor.
Page 51: Forced Operation Mode
SiBE041012 Control Specification 3.13 Forced Operation Mode Outline Forced operation mode includes only forced cooling. Detail Item Forced Cooling Conditions 1) The outdoor unit is not abnormal and not in the 3-minute standby mode. 2) The outdoor unit is not operating. The forced operation is allowed when the above both conditions are met.
Page 52: Part 5 Operation Manual
SiBE041012 Part 5 Operation Manual 1. System Configuration................43 2. Operation Manual..................44 2.1 Name of Parts ..................44 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........48 2.3 Adjusting the Airflow Direction and Rate ..........50 2.4 COMFORT AIRFLOW Operation ............52 2.5 INTELLIGENT EYE Operation ...............53 2.6 POWERFUL Operation ................55 2.7 OUTDOOR UNIT QUIET Operation............56...
Page 53: System Configuration
SiBE041012 System Configuration 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 54: Operation Manual
Operation Manual SiBE041012 2. Operation Manual Name of Parts Name of Parts Indoor Unit INTELLIGENT EYE Air inlet sensor • Appearance of the indoor unit may differ. • It detects the movements of people and automatically switches between normal operation and energy saving operation.
Page 55 SiBE041012 Operation Manual Open the front panel Panel support plate Air filter Titanium apatite photocatalytic air-purifying filter Outdoor Unit • Appearance of the outdoor unit may differ from some models. Air inlet Outdoor temperature (back and sensor (back) side) Drain hose Earth terminal •...
Page 56 Operation Manual SiBE041012 Name of Parts Remote Controller Signal transmitter Receiver 50cm or more Display (LCD) • It displays the current settings. • To use the remote controller, aim the (In this illustration, each section is transmitter at the indoor unit. If there shown with its displays on for the is anything to block signals between purpose of explanation.)
Page 57 SiBE041012 Operation Manual Open the front cover MODE selector button • It selects the operation mode. (AUTO/DRY/COOL/HEAT/ FAN) Page 11 ECONO button • ECONO operation. Page 20 SWING button • Adjusting the airflow direction. Page 13 QUIET button • OUTDOOR UNIT QUIET operation.
Page 58: Auto · Dry · Cool · Heat · Fan Operation
Operation Manual SiBE041012 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. To start operation Press and select a operation mode.
Page 59 SiBE041012 Operation Manual To change the temperature setting Press • The displayed items on the LCD will change whenever either one of the buttons is pressed. COOL operation HEAT operation AUTO operation DRY or FAN operation 18-32˚C 10-30˚C 18-30˚C The temperature setting is Press to raise the temperature and press to lower the...
Page 60: Adjusting The Airflow Direction And Rate
Operation Manual SiBE041012 Adjusting the Airflow Direction and Rate Adjusting the Airflow Direction and Rate You can adjust the airfl ow direction to increase your comfort. To start auto swing Upper and lower airflow direction Press • “ ” is displayed on the LCD. •...
Page 61 SiBE041012 Operation Manual To adjust the airflow rate setting Press • Each pressing of advances the airflow rate setting in sequence. Auto Indoor unit quiet Middle low High Middle high Middle • When the airflow is set to “ ”, indoor unit quiet operation will start and the noise from the unit will become quieter.
Page 62: Comfort Airflow Operation
Operation Manual SiBE041012 COMFORT AIRFLOW Operation COMFORT AIRFLOW Operation The flow of air will be in the upward direction while in COOL operation and in the downward direction while in HEAT operation, which will provide a comfortable wind that will not come in direct contact with people. To start COMFORT AIRFLOW operation Press •...
Page 63: Intelligent Eye Operation
SiBE041012 Operation Manual INTELLIGENT EYE Operation INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. If nobody in the room for more than 20 minutes, the operation automatically changes to energy saving operation. To start INTELLIGENT EYE operation Press •...
Page 64 Operation Manual SiBE041012 INTELLIGENT EYE Operation [Example] When somebody in the room When nobody in the room Somebody back in the room Normal operation 20 minutes after, start Back to normal operation. energy saving operation. • The air conditioner is in normal •...
Page 65: Powerful Operation
SiBE041012 Operation Manual 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 Press during operation. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.
Page 66: Outdoor Unit Quiet Operation
Operation Manual SiBE041012 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 the night. To start OUTDOOR UNIT QUIET operation Press •...
Page 67: Econo Operation
SiBE041012 Operation Manual ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by limiting the maximum power consumption value. This function is useful for cases in which attention should be paid to ensure a circuit breaker will not trip when the product runs alongside other appliances. To start ECONO operation Press during operation.
Page 68: Off Timer Operation
Operation Manual SiBE041012 OFF TIMER Operation OFF 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 69: On Timer Operation
SiBE041012 Operation Manual 2.10 ON TIMER Operation ON TIMER Operation To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. Press • “ ” is displayed on the LCD. •...
Page 70: Weekly Timer Operation
Operation Manual SiBE041012 2.11 WEEKLY TIMER Operation WEEKLY TIMER Operation Up to 4 timer settings can be saved for each day of the week. It is convenient if the WEEKLY TIMER is set according to the family’s life style. Using in these cases of WEEKLY TIMER Example: The same timer settings are made for the week from Monday through Friday while different timer settings are made for the weekend.
Page 71 SiBE041012 Operation Manual To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C 27˚C...
Page 72 Operation Manual SiBE041012 WEEKLY TIMER Operation Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10 minute intervals. • To return to the ON/OFF TIMER mode setting, press • Go to step when setting the OFF TIMER.
Page 73 SiBE041012 Operation Manual Copy mode • A reservation made once can be copied to another day of the week. The whole reservation of the selected day of the week will be copied. Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C 27˚C...
Page 74 Operation Manual SiBE041012 WEEKLY TIMER Operation Confirming a reservation • The reservation can be confi rmed. Setting Displays Normal Confirmation Press • The day of the week and the reservation number of the current day will be displayed. Press to select the day of the week and the reservation number to be confirmed.
Page 75 SiBE041012 Operation Manual To delete reservations The individual reservation Press • The day of the week and the reservation number will be displayed. Press to select the day of the week and the reservation number to be deleted. Press • “ ”...
Page 76: Part 6 Service Diagnosis
SiBE041012 Part 6 Service Diagnosis 1. Caution for Diagnosis................67 1.1 Troubleshooting with LED ..............67 2. Problem Symptoms and Measures ............68 3. Service Check Function ................69 4. Troubleshooting ..................72 4.1 Error Codes and Description ..............72 4.2 Indoor Unit PCB Abnormality ..............73 4.3 Freeze-up Protection Control or Heating Peak-cut Control....74 4.4 Fan Motor (DC Motor) or Related Abnormality........76 4.5 Thermistor or Related Abnormality (Indoor Unit)........78...
Page 77: Caution For Diagnosis
SiBE041012 Caution for Diagnosis 1. Caution for Diagnosis Troubleshooting with LED Indoor Unit The multi-colored indicator lamp blinks 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.
Page 78: Problem Symptoms And Measures
Problem Symptoms and Measures SiBE041012 2. Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page The units does not operate. 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 79: Service Check Function
SiBE041012 Service Check Function 3. Service Check Function 1. When the timer cancel button is held down for 5 seconds, “ 00 ” indication appears on the Check Method 1 temperature display section. TIMER CANCEL button < ARC466 Series > (R11668) 2.
Page 80 Service Check Function SiBE041012 Check Method 2 1. Press the center of the Temp button and the Mode button at the same time. (R11669) “ 5C ” is displayed on the LCD. (R11821) 2. Select “ 5C ” (service check) with the Temp▲ or ▼ button. 3.
Page 81 SiBE041012 Service Check Function 6. Press the Mode button. (R11672) The figure of the one’s place blinks. (R11673) 7. Press the Temp ▲ or ▼ button and change the figure until you hear the sound of “beep”. (R11671) 8. Diagnose by the sound. ★...
Page 82: Troubleshooting
Troubleshooting SiBE041012 4. Troubleshooting Error Codes and Description Reference Error Codes Description Page System Normal — U0★ Refrigerant shortage Low-voltage detection or over-voltage detection Signal transmission error (between indoor unit and outdoor unit) Unspecified voltage (between indoor unit and outdoor unit) Indoor Indoor unit PCB abnormality Unit...
Page 83: Indoor Unit Pcb Abnormality
SiBE041012 Troubleshooting Indoor Unit PCB Abnormality Remote Controller Display Method of The system checks if the circuit works properly within the microcomputer of the indoor unit. Malfunction Detection Malfunction The system cannot set the internal settings. Decision Conditions Supposed Wrong models interconnected Causes Defective indoor unit PCB Disconnection of connector...
Page 84: Freeze-Up Protection Control Or Heating Peak-Cut Control
Troubleshooting SiBE041012 Freeze-up Protection Control or Heating Peak-cut Control Remote Controller Display Method of Freeze-up protection control During cooling operation, the freeze-up protection control (operation halt) is activated Malfunction according to the temperature detected by the indoor heat exchanger thermistor. Detection Heating peak-cut control During heating operation, the temperature detected by the indoor heat exchanger thermistor...
Page 85 SiBE041012 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.06 Check the air passage. Refer to P.109 Is there any short circuit? Provide sufficient air passage. Check the air filter.
Page 86: Fan Motor (Dc Motor) Or Related Abnormality
Troubleshooting SiBE041012 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 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 87 SiBE041012 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Turn off the power supply Refer to P.107 and rotate the fan by hand. Does the fan Replace the indoor rotate smoothly? fan motor.
Page 88: Thermistor Or Related Abnormality (Indoor Unit)
Troubleshooting SiBE041012 Thermistor or Related Abnormality (Indoor Unit) C4 , C9 Remote Controller Display Method of The temperatures detected by the thermistors determine thermistor errors. Malfunction Detection Malfunction The thermistor input is more than 4.96 V or less than 0.04 V during compressor operation. Decision Conditions Supposed...
Page 89: Front Panel Open / Close Fault
SiBE041012 Troubleshooting Front Panel Open / Close Fault Remote Controller Display Method of Malfunction Detection Malfunction If the error repeats twice, the system is shut down. Decision Conditions Supposed Defective reduction motor Causes Malfunction or deterioration of the front panel mechanism Defective limit switch Troubleshooting Be sure to turn off the power switch before connecting or disconnecting...
Page 90: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)
Troubleshooting SiBE041012 Signal Transmission Error (between Indoor Unit 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 The data sent from the outdoor unit cannot be received normally, or the content of the data is abnormal.
Page 91: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)
SiBE041012 Troubleshooting Unspecified Voltage (between Indoor Unit and Outdoor Unit) 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.
Page 92: Outdoor Unit Pcb Abnormality
Troubleshooting SiBE041012 Outdoor Unit PCB Abnormality Remote Controller Display Method of The system follows the microprocessor program as specified. The system checks to see if the zero-cross signal comes in properly. Malfunction Detection Malfunction The microprocessor program runs out of control. The zero-cross signal is not detected.
Page 93: Ol Activation (Compressor Overload)
SiBE041012 Troubleshooting 4.10 OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the error repeats twice, the system is shut down. Reset condition: Continuous run for about 60 minutes without any other error Decision ∗...
Page 94: Compressor Lock
Troubleshooting SiBE041012 4.11 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 Operation stops due to overcurrent. If the error repeats 16 times, the system is shut down. Decision Reset condition: Continuous run for about 11 minutes without any other error Conditions...
Page 95: Dc Fan Lock
SiBE041012 Troubleshooting 4.12 DC Fan Lock Remote Controller Display Method of An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Malfunction Detection Malfunction The fan does not start in 15 seconds even when the fan motor is running. If the error repeats 16 times, the system is shut down.
Page 96: Input Overcurrent Detection
Troubleshooting SiBE041012 4.13 Input Overcurrent Detection Remote Controller Display Method of An input overcurrent 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 9.25 A Decision Conditions...
Page 97: Four Way Valve Abnormality
SiBE041012 Troubleshooting 4.14 Four Way Valve Abnormality Remote Controller Display Method of The room temperature thermistor, the indoor heat exchanger thermistor, the outdoor Malfunction temperature thermistor, and the outdoor heat exchanger thermistor are checked if they function within their normal ranges in each operation mode. Detection Malfunction A following condition continues over 10 minutes after operating for 5 minutes.
Page 98 Troubleshooting SiBE041012 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.05 Four way valve coil Correct it. Refer to P.108 disconnected (loose)? Check No.06 Harness out of connector? Refer to P.109 Reconnect it.
Page 99: Discharge Pipe Temperature Control
SiBE041012 Troubleshooting 4.15 Discharge Pipe Temperature Control Remote Controller Display Method of An error is determined with the temperature detected by the discharge pipe thermistor. Malfunction Detection Malfunction If the temperature detected by the discharge pipe thermistor rises above °C, the compressor stops.
Page 100: High Pressure Control In Cooling
Troubleshooting SiBE041012 4.16 High Pressure Control in Cooling Remote Controller Display Method of High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if Malfunction the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection Malfunction The temperature sensed by the outdoor heat exchanger thermistor rises above °C.
Page 101 SiBE041012 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.04 Check the installation space. Refer to P.107 Check No. 07 Check No.06 Change the installation Check the installation Refer to P.109 location or direction.
Page 102: Compressor System Sensor Abnormality
Troubleshooting SiBE041012 4.17 Compressor System Sensor Abnormality Remote Controller Display Method of The system checks the DC current before the compressor starts. Malfunction Detection Malfunction The DC current before compressor start-up is out of the range 0.5 ~ 4.5 V (sensor output converted to voltage value) Decision The DC voltage before compressor start-up is below 50 V.
Page 103: Position Sensor Abnormality
SiBE041012 Troubleshooting 4.18 Position Sensor Abnormality Remote Controller Display Method of A compressor start-up failure is detected by checking the compressor running condition through Malfunction the position detection circuit. Detection Malfunction If the error repeats 16 times, the system is shut down. Reset condition: Continuous run for about 11 minutes without any other error Decision Conditions...
Page 104 Troubleshooting SiBE041012 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.29 Turn off the power. Refer to P.113 Check the power supply voltage. Voltage as rated? Correct the power supply. Check No.
Page 105: Dc Voltage / Current Sensor Abnormality
SiBE041012 Troubleshooting 4.19 DC Voltage / Current Sensor Abnormality Remote Controller Display Method of DC voltage or DC current sensor abnormality is identified based on the compressor running Malfunction frequency and the input current. Detection Malfunction The compressor running frequency is above 52 Hz. If the error repeats 4 times, the system is shut down.
Page 106: Thermistor Or Related Abnormality (Outdoor Unit)
Troubleshooting SiBE041012 4.20 Thermistor or Related Abnormality (Outdoor Unit) H9 , J3 , J6 , P4 Remote Controller Display Method of This fault is identified based on the thermistor input voltage to the microcomputer. Malfunction A thermistor fault is identified based on the temperature sensed by each thermistor. Detection Malfunction The thermistor input voltage is above 4.96 V or below 0.04 V with the power on.
Page 107 SiBE041012 Troubleshooting In case of “ H9 ” “ J3 ” “ J6 ” Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.06 Turn on the power again. Refer to P.109 Error displayed Reconnect the connectors...
Page 108: Electrical Box Temperature Rise
Troubleshooting SiBE041012 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 °C.
Page 109 SiBE041012 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. WARNING Check No.07 Turn off the power and turn it on again. To cool the electrical components, Refer to P.110 the outdoor fan starts when the radiation fin temperature rises above...
Page 110: Radiation Fin Temperature Rise
Troubleshooting SiBE041012 4.22 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 °C.
Page 111 SiBE041012 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.07 Turn off the power and turn it on Refer to P.110 again to start the system. Check No.09 Refer to P.111 Error displayed again?
Page 112: Output Overcurrent Detection
Troubleshooting SiBE041012 4.23 Output Overcurrent Detection Remote Controller Display Method of An output overcurrent 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 113 SiBE041012 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. ∗ An output overcurrent signal may result from wrong internal wiring. If the wires have been disconnected and reconnected and the system is interrupted by an output overcurrent, take the Check No.07 following procedure.
Page 114: Refrigerant Shortage
Troubleshooting SiBE041012 4.24 Refrigerant Shortage Remote Controller Display Method of Refrigerant shortage detection I: Malfunction Refrigerant shortage is detected by checking the input current value and the compressor running frequency. If the refrigerant is short, the input current is smaller than the normal value. Detection Refrigerant shortage detection II: Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of...
Page 115 SiBE041012 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.04 Refer to P.107 Any thermistor Replace them in position. disconnected? ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗...
Page 116: Low-Voltage Detection Or Over-Voltage Detection
Troubleshooting SiBE041012 4.25 Low-voltage Detection or Over-voltage Detection Remote Controller Display Method of Low-voltage detection: Malfunction An abnormal voltage drop is detected by the DC voltage detection circuit. Detection Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit. Malfunction Low-voltage detection: The voltage detected by the DC voltage detection circuit is below 180 V.
Page 117: Check
SiBE041012 Check 5. Check How to Check 5.1.1 Fan Motor Connector Output Check Check No.01 1. Check the connection of connector. 2. Check the motor power supply voltage output (pins 4 - 7). 3. Check the motor control voltage (pins 4 - 3). 4.
Page 118 Check SiBE041012 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 heating operation. Cooling / Dry : No continuity Heating : Continuity voltage at 220 - 240 Replace the outdoor unit VAC with compressor PCB.
Page 119 SiBE041012 Check 5.1.4 Thermistor Resistance Check Check No.06 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the table and the graph below.
Page 120 Check SiBE041012 5.1.5 Installation Condition Check Check No.07 Installation condition check Check the allowable Abnormal dimensions of the air Change the installation suction and location or direction. discharge area. Normal Is the discharged air Change the installation short-circuited? location or direction. Is the outdoor heat Clean the outdoor heat exchanger very dirty?
Page 121 SiBE041012 Check 5.1.7 Outdoor Fan System Check Check No.09 DC motor Check the outdoor fan system. Fan motor lead wire connector Outdoor fan running? Reconnect the connector. disconnected? Go to Check No. 15. Outdoor fan system is functioning. (R7159) 5.1.8 Power Supply Waveforms Check Check No.10 Measure the power supply waveform between No.
Page 122 Check SiBE041012 5.1.10 Power Module Check Check No.13 Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approx. 0 V before checking. Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.
Page 123 SiBE041012 Check 5.1.12 Main Circuit Short Check Check No.29 Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approx. 0 V before checking. Measure the resistance between the pins of the DB1 as below. If the resistance is ∞...
Page 124: Part 7 Removal Procedure
SiBE041012 Part 7 Removal Procedure 1. Indoor Unit...................115 1.1 Removal of Air Filter / Front Panel ............115 1.2 Removal of Horizontal Blades ..............119 1.3 Removal of Front Grille ................121 1.4 Removal of Front Panel Mechanism ASSY..........124 1.5 Removal of Display Lens ASSY ............126 1.6 Removal of Reduction Motor / Limit Switch..........127 1.7 Removal of Fan Guard / Electrical Box ..........129 1.8 Removal of PCB...................132...
Page 125: Indoor Unit
SiBE041012 Indoor Unit 1. Indoor Unit Removal of Air Filter / Front Panel Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Appearance feature (R12067) INTELLIGENT EYE sensor Multi-colored indicator lamp /...
Page 126 Indoor Unit SiBE041012 Step Procedure Points Lift the air filter upwards slightly, and then pull it out downwards. Air filter (R12071) The air filter is not marked for difference between the right and left sides. The air filter can be set easily by inserting it along the guides.
Page 127 SiBE041012 Indoor Unit Step Procedure Points Release the protrusions and remove the Titanium apatite photocatalytic air- purifying filter frame. Remove the Titanium apatite photocatalytic air-purifying filter. (R12074) 4. Remove the front panel. Open the front panel at least 90 degrees. (R12075) Removal Procedure...
Page 128 Indoor Unit SiBE041012 Step Procedure Points Release the front panel Front panel lock Right locks on each side. (R12076) Left (R12077) Remove the front panel. (R12078) Removal Procedure...
Page 129: Removal Of Horizontal Blades
SiBE041012 Indoor Unit Removal of Horizontal Blades Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the horizontal blade (large). Bend the horizontal blade (large) slightly and release the center shaft.
Page 130 Indoor Unit SiBE041012 Step Procedure Points 2. Remove the horizontal blade (small). Bend the horizontal blade (small) slightly and release the center shaft. Horizontal blades (small) (R12082) Release the left shaft. (R12083) Slide the horizontal blade (small) to the left and release the right shaft.
Page 131: Removal Of Front Grille
SiBE041012 Indoor Unit Removal of Front Grille Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 screws Decoration panel of the decoration panel (right).
Page 132 Indoor Unit SiBE041012 Step Procedure Points Disconnect the relay Relay connector connector for the reduction motor. (R12088) Open the 2 screw covers with a flat screwdriver. Screw cover (R12089) Remove the 2 screws. (R12090) Removal Procedure...
Page 133 SiBE041012 Indoor Unit Step Procedure Points Remove the screw. (R12091) Remove the screw. (R12164) Unfasten the 3 hooks on the top of the front grille. Front grille (R12092) Remove the front grille. (R12093) Removal Procedure...
Page 134: Removal Of Front Panel Mechanism Assy
Indoor Unit SiBE041012 Removal of Front Panel Mechanism ASSY Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 screws of the front grille (right). (R12094) Remove the guide Guide panel...
Page 135 SiBE041012 Indoor Unit Step Procedure Points Remove the shaft holder and the cover shaft. Shaft holder Cover shaft (R12097) Remove the shaft. (R12098) Removal Procedure...
Page 136: Removal Of Display Lens Assy
Indoor Unit SiBE041012 Removal of Display Lens ASSY Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the display lens ASSY by turning it counterclockwise. Display lens ASSY (R12102) Unfasten the hook and...
Page 137: Removal Of Reduction Motor / Limit Switch
SiBE041012 Indoor Unit Removal of Reduction Motor / Limit Switch Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Cut the clamp of the front panel mechanism ASSY (right).
Page 138 Indoor Unit SiBE041012 Step Procedure Points Remove the screw of the reduction motor. Reduction motor (R12107) Remove the reduction motor by turning it counterclockwise. (R12108) Remove the limit switch. Limit switch (R12109) Removal Procedure...
Page 139: Removal Of Fan Guard / Electrical Box
SiBE041012 Indoor Unit Removal of Fan Guard / Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the fan guard. Use the a sharp tool such as an awl to unfasten the lower Unfasten the 2 hooks hooks.
Page 140 Indoor Unit SiBE041012 Step Procedure Points Remove the screws and release the connecting wires. Connecting wire (R12113) Remove the shield Shield plate plate. (R12114) Disconnect the [S41] connectors for the swing motors [S41] and for the fan motor [S200] [S200]. (R12115) Removal Procedure...
Page 141 SiBE041012 Indoor Unit Step Procedure Points Release the harnesses. (R12116) Remove the screw. (R12117) Unfasten the 2 hooks There are 2 hooks on the Electrical box and remove the bottom frame. When electrical box. reassembling, fit the rear side of the electrical box to the hooks.
Page 142: Removal Of Pcb
Indoor Unit SiBE041012 Removal of PCB Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Unfasten the 4 hooks Lamp cover ASSY and remove the lamp cover ASSY from the electrical box.
Page 143 SiBE041012 Indoor Unit Step Procedure Points Disconnect the [S51] connectors for the control PCB [S51] and for the room temperature thermistor [S52]. [S52] (R12122) Refer to page 7 for detail. [S51]: control PCB [S52]: room temperature [S52] thermistor [S51] (R12123) Cut the clamp.
Page 144 Indoor Unit SiBE041012 Step Procedure Points Release the harness from the hook. (R12125) Unfasten the 3 hooks of Sensor ASSY the sensor ASSY with a flat screwdriver. (R12126) Remove the sensor INTELLIGENT ASSY. EYE sensor PCB (R12127) Disconnect the connector [S36] from the INTELLIGENT EYE sensor PCB.
Page 145 SiBE041012 Indoor Unit Step Procedure Points Cut the clamp. (R12129) Remove the shield plate. Shield plate (R12130) Remove the screw of the terminal board. Terminal board (R12131) Removal Procedure...
Page 146 Indoor Unit SiBE041012 Step Procedure Points Pull out the terminals and remove the terminal board. (R12132) Release the harnesses from the groove. (R12133) Release the harnesses of the signal receiver / display PCB. (R12134) Unfasten the 3 hooks. (R12135) Removal Procedure...
Page 147 SiBE041012 Indoor Unit Step Procedure Points Unfasten the other 2 Control PCB hooks and remove the control PCB. (R12136) Refer to page 7 for detail. [S46] [S21] [S21]: HA connector [S25] [S25]: INTELLIGENT EYE sensor PCB [S32]: indoor heat exchanger thermistor [S42] [S41]: swing motors...
Page 148: Removal Of Swing Motor
Indoor Unit SiBE041012 Removal of Swing Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 screws Connector color of the swing motor. Upper blade: white Lower blade: red Swing motor...
Page 149: Removal Of Lndoor Heat Exchanger
SiBE041012 Indoor Unit 1.10 Removal of lndoor Heat Exchanger Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Disconnect the refrigerant piping. Caution In pump-down work, be sure Remove the screws to stop the compressor fixed to the installation...
Page 150 Indoor Unit SiBE041012 Step Procedure Points 3. Remove the indoor heat Piping fixture exchanger. Unfasten the hook of the piping fixture at the back of the indoor unit and pull out the pipe. (R12143) Widen the auxiliary pipe by about 10-20 Caution degrees.
Page 151 SiBE041012 Indoor Unit Step Procedure Points Remove the indoor heat Indoor heat exchanger. exchanger (R12147) Removal Procedure...
Page 152: Removal Of Fan Rotor / Fan Motor
Indoor Unit SiBE041012 1.11 Removal of Fan Rotor / Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the right side panel. Remove the screw.
Page 153 SiBE041012 Indoor Unit Step Procedure Points Remove the fan motor Fan motor fixing plate fixing plate. (R12151) Remove the fan rotor. Fan rotor (R12152) Remove the bearing. Bearing (R12153) Removal Procedure...
Page 154 Indoor Unit SiBE041012 Step Procedure Points 3. Remove the fan motor. When reassembling the fan motor and the fan rotor, Remove the screw and provide as much as 5 mm of remove the fan motor. play between the side face of the rotor and the bottom frame.
Page 155: Removal Of Vertical Blade Assy
SiBE041012 Indoor Unit 1.12 Removal of Vertical Blade ASSY Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Unfasten the 3 hooks at A vertical blade ASSY has 6 the shaft mounting part fins.
Page 156: Outdoor Unit
Outdoor Unit SiBE041012 2. Outdoor Unit Removal of Outer Panels / 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. Appearance features Handle (R7186) Take care not to cut your finger by the fins of the outdoor heat exchanger.
Page 157 SiBE041012 Outdoor Unit Step Procedure Points Remove the 2 screws Top panel and lift the top panel. (R7190) Remove the drip proof Drip proof plate plate. (R7191) Remove the 4 screws and remove the discharge grille. Discharge grille (R7192) The discharge grille has 4 hooks.
Page 158 Outdoor Unit SiBE041012 Step Procedure Points Remove the 8 screws of the front panel. (R11825) Front panel Unfasten the hooks. The front panel has 4 hooks. Pull and remove the front panel. Hooks (R11826) Removal Procedure...
Page 159 SiBE041012 Outdoor Unit Step Procedure Points 3. Remove the fan motor. The screw has reverse winding. Unscrew the washer- Wrench size: 10 mm fitted nut (M6) of the outdoor fan. Outdoor fan (R11827) Remove the outdoor When reassembling, align fan. mark of the outdoor fan with D-cut section of the motor shaft.
Page 160 Outdoor Unit SiBE041012 Step Procedure Points Cut the clamp. (R11830) Disconnect the connector for the fan motor [S70]. (R11831) [S70] Release the fan motor Fan motor lead wire from the hook. lead wire (R11832) Removal Procedure...
Page 161 SiBE041012 Outdoor Unit Step Procedure Points Remove the screw and remove the fan motor fixing frame. Fan motor fixing frame (R11833) (R11834) When reassembling, fit the lower hooks into the bottom frame. (R7206) Removal Procedure...
Page 162 Outdoor Unit SiBE041012 Step Procedure Points Open the hooks and When reassembling, put the release the fan motor fan motor lead wire through lead wire. the back of the fan motor (so as not to be entangled with the outdoor fan). (R11835) Lead wire Outdoor fan...
Page 163 SiBE041012 Outdoor Unit Step Procedure Points Remove the 4 screws Right side panel on the right side panel. (R12163) Remove the screw near the stop valves. (R11839) Unfasten the hook on When reassembling, make the rear side. sure to fit the hook. (R11842) Removal Procedure...
Page 164 Outdoor Unit SiBE041012 Step Procedure Points Lift up the right side When reassembling, make panel to remove. sure to fit the hook. Right side panel Hook (R11843) Lift up the guard net to Guard net remove. (R11841) Removal Procedure...
Page 165: Removal Of Electrical Box
SiBE041012 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 1. Remove the electrical Preparation box. Remove the panels and disconnect the connector for Disconnect the the fan motor according to connector for the...
Page 166 Outdoor Unit SiBE041012 Step Procedure Points Disconnect the relay connector for the compressor. (R11845) Disconnect the connector for the electronic expansion valve coil [S20]. [S20] (R11847) Cut the clamp. (R11850) Pull out the outdoor Be careful not to lose the clip heat exchanger for the thermistor.
Page 167 SiBE041012 Outdoor Unit Step Procedure Points Release the discharge Be careful not to lose the clip pipe thermistor. for the thermistor. (R7702) Discharge pipe thermistor (R11849) Lift and remove the Electrical Box electrical box. (R11852) Removal Procedure...
Page 168: Removal Of Pcb
Outdoor Unit SiBE041012 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 1. Remove the main PCB. You can remove the main PCB when you disconnect Feature of the main the read wires on the terminal board without...
Page 169 SiBE041012 Outdoor Unit Step Procedure Points Pull out the forced Be careful of a sharp operation button PCB. protrusion at the back of the Disconnect the forced operation button connector [S110] to PCB. remove the forced operation button PCB. Forced operation button PCB (R11856) Disconnect the relay connector.
Page 170 Outdoor Unit SiBE041012 Step Procedure Points Release the harness. (R11859) Cut the clamps at the 2 locations. (R11860) Disconnect the connector for the filter PCB [S10]. [S10] (R11861) Removal Procedure...
Page 171 SiBE041012 Outdoor Unit Step Procedure Points Disconnect the connectors for the [S100] magnetic relay [S50] and for the forced operation button PCB [S100]. [S50] (R11862) Disconnect the connector for the filter [HN3] PCB [HN3], [HL3]. [HL3] (R11863) Release the harnesses from the hook.
Page 172 Outdoor Unit SiBE041012 Step Procedure Points Remove the 6 screws. (R11866) Unfasten the 4 hooks and remove the main PCB. (R11867) Refer to page 11 for detail. [S10]: filter PCB [S50] [S100] [S20]: electronic expansion valve coil [HL3] [S40]: overload protector [HN3] [S50]: magnetic relay [HL3]...
Page 173 SiBE041012 Outdoor Unit Step Procedure Points 2. Remove the filter PCB. Release the harnesses from the hook. Filter PCB (R11869) Cut the clamp. (R11871) Release the harnesses from the hook. (R11872) Removal Procedure...
Page 174 Outdoor Unit SiBE041012 Step Procedure Points Release the harnesses from the hooks. (R11873) Remove the screw. (R11874) Unfasten the 2 hooks. Lift and pull out the filter PCB. Filter PCB (R11876) (R11877) Removal Procedure...
Page 175 SiBE041012 Outdoor Unit Step Procedure Points Feature of the filter Refer to page 10 for detail. (R11878) Removal Procedure...
Page 176: Removal Of Reactor / Partition Plate
Outdoor Unit SiBE041012 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 1. Remove the reactor. Preparation Reactor Remove the outer panels Remove the screw and according to the “Removal of remove the reactor.
Page 177 SiBE041012 Outdoor Unit Step Procedure Points The partition plate has Partition plate a hook on the lower side. Lift and pull the partition plate to remove. (R11882) When reassembling, fit the lower hook into the bottom frame. (R11883) Removal Procedure...
Page 178: Removal Of Sound Blanket
Outdoor Unit SiBE041012 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 1. Remove the sound Since the piping ports are blanket. torn easily, remove the sound blanket carefully.
Page 179 SiBE041012 Outdoor Unit Step Procedure Points Pull the sound blanket (inner) out. Sound blanket (inner) (R11887) Pull the sound blanket (bottom) out. Sound blanket (bottom) (R11888) Removal Procedure...
Page 180: Removal Of Four Way Valve
Outdoor Unit SiBE041012 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. Electronic expansion Pull out the electronic valve coil expansion valve coil.
Page 181 SiBE041012 Outdoor Unit Step Procedure Points Remove the screw and Four way valve coil remove the four way Caution valve coil. Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine. Caution From the viewpoint of global environment protection, do...
Page 182 Outdoor Unit SiBE041012 Step Procedure Points Warning If the refrigerant gas leaks during the work, ventilate the room. (If the refrigerant gas is exposed to flames, toxic gas may be generated.) (R7250) Removal Procedure...
Page 183: Removal Of Compressor
SiBE041012 Outdoor Unit 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 2 nuts of the compressor. Warning If refrigerant gas leaks during the work, ventilate the room.
Page 184 Outdoor Unit SiBE041012 Step Procedure Points Heat up the brazed part of the suction side and disconnect. Suction side (R12032) Lift the compressor up and remove it. (R7254) Removal Procedure...
Page 185 SiBE041012 Part 8 Others 1. Others ....................176 1.1 Trial Operation..................176 1.2 Field Settings..................177 1.3 Application of Silicon Grease to a Power Transistor and a Diode Bridge..................178 Others...
Page 186: Part 8 Others
Others SiBE041012 1. Others Trial Operation Outline 1. Measure the supply voltage and make sure that it falls in the specified range. 2. Trial operation should be carried out in either cooling or heating mode. 3. Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts, such as flap movement, are working properly.
Page 187: Field Settings
SiBE041012 Others Field Settings 1.2.1 When 2 Units are Installed in 1 Room When 2 indoor units are installed in 1 room, 1 of the 2 pairs of indoor unit and wireless remote controller can be set for different addresses. Both the indoor unit PCB and the wireless remote controller need alteration.
Page 188: Application Of Silicon Grease To A Power Transistor And A Diode Bridge
Others SiBE041012 Application of Silicon Grease to a Power Transistor and a Diode Bridge Applicable All outdoor units using inverter type compressor for room air conditioner. Models When the printed circuit board (PCB) 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 radiation fin) of the power transistor and diode bridge.
Page 189: Part 9 Appendix
SiBE041012 Part 9 Appendix 1. Piping Diagrams..................180 1.1 Indoor Unit....................180 1.2 Outdoor Unit ..................180 2. Wiring Diagrams..................181 2.1 Indoor Unit....................181 2.2 Outdoor Unit ..................181 Appendix...
Page 190: Piping Diagrams
Piping Diagrams SiBE041012 1. Piping Diagrams Indoor Unit FTXG25/35JV1BW(S) INDOOR UNIT 6.4CuT HEAT EXCHANGER THERMISTOR CROSS FLOW FAN ON HEAT EXCH. FIELD PIPING 6.4CuT FAN MOTOR FIELD PIPING 9.5CuT 9.5CuT REFRIGERANT FLOW COOLING HEATING 4D065855 Outdoor Unit RXG25/35J2V1B OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER 7.0CuT...
Page 191: Wiring Diagrams
SiBE041012 Wiring Diagrams 2. Wiring Diagrams Indoor Unit FTXG25/35JV1BW(S) : FRAME GROUND : FUSE H1P, H2P : PILOT LAMP 3.15A C102 : FAN MOTOR OUTDOOR MR10 M1S, M2S : SWING MOTOR : STEPPING MOTOR C101 INTELLIGENT EYE TRANSMISSION A1P~A3P : PRINTED CIRCUIT BOARD / YLW SENSOR FIELD WIRING.
Page 192 Daikin Industries, Ltd.’s products are manufactured for export to numerous countries throughout the Warning world. Daikin Industries, Ltd. does not have control over which products are exported to and used in a particular country. Prior to purchase, please therefore confirm with your local authorised importer, distributor and/or retailer whether this product conforms to the applicable standards, and is suitable for use, in the region where the product will be used.

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Ftxg25jv1bw Ftxg25jv1bs Ftxg35jv1bw Ftxg35jv1bs Rxg25j2v1b Rxg35j2v1b

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