Daikin J-Series Service Manual
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Daikin J-Series Service Manual

Inverter pair wall mounted type
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See also: Engineeiring Data , Operating Manual
SiBE041025
Inverter Pair
Wall Mounted Type J-Series
[Applied Models]
Inverter Pair : Heat Pump

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Summary of Contents for Daikin J-Series

  • Page 1 SiBE041025 Inverter Pair Wall Mounted Type J-Series [Applied Models] Inverter Pair : Heat Pump...
  • Page 2 SiBE041025 Inverter Pair Wall Mounted Type J-Series Heat Pump Indoor Unit FTXN25JEV1B FTXN35JEV1B Outdoor Unit RXN25JEV1B RXN35JEV1B Table of Contents...

  • Page 3: Table Of Contents

    SiBE041025 1. Introduction .....................v 1.1 Safety Cautions ..................v 1.2 Used Icons ....................ix Part 1 List of Functions ..............1 1. Functions....................2 Part 2 Specifications ..............3 1. Specifications ..................4 Part 3 Printed Circuit Board Connector Wiring Diagram ..... 5 1.
  • Page 4 SiBE041025 2.4 COMFORT AIRFLOW Operation ............41 2.5 POWERFUL Operation ................42 2.6 ECONO Operation .................43 2.7 OFF TIMER Operation ................44 2.8 ON TIMER Operation ................45 Part 6 Service Diagnosis............. 46 1. Caution for Diagnosis................47 1.1 Troubleshooting with LED ..............47 2. Problem Symptoms and Measures ............48 3.
  • Page 5 SiBE041025 2. Outdoor Unit..................118 2.1 Removal of Panels ................118 2.2 Removal of Outdoor Fan / Fan Motor...........120 2.3 Removal of Electrical Box / PCB ............122 2.4 Removal of Sound Blanket..............134 2.5 Removal of Four Way Valve..............136 2.6 Removal of Compressor...............139 Part 8 Others ................

  • Page 6: Introduction

    Introduction SiBE041025 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 SiBE041025 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 SiBE041025 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 SiBE041025 Introduction Warning Be sure to install the product correctly by using the provided standard For unitary type installation frame. only Incorrect use of the installation frame and improper installation may cause the equipment to fall, resulting in injury. Be sure to install the product securely in the installation frame mounted on the For unitary type window frame.

  • Page 10: Used Icons

    Introduction SiBE041025 Caution Do not tilt the unit when removing it. The water inside the unit may spill and wet the furniture and floor. Be sure to install the packing and seal on the installation frame properly. For unitary type If the packing and seal are not installed properly, water may enter the room and only wet the furniture and floor.

  • Page 11: Part 1 List Of Functions

    SiBE041025 Part 1 List of Functions 1. Functions....................2 List of Functions...

  • Page 12: Functions

    Functions SiBE041025 1. Functions Category Functions Category Functions Basic Inverter Health & Air-Purifying Filter — Function (with Inverter Power Control) Clean Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — Air-Purifying Filter with Photocatalytic – Operation Limit for Heating (°CWB) —...

  • Page 13: Part 2 Specifications

    SiBE041025 Part 2 Specifications 1. Specifications ..................4 Specifications...

  • Page 14: Specifications

    Specifications SiBE041025 1. Specifications 50 Hz, 220 - 230 - 240 V Indoor Units FTXN25JEV1B FTXN35JEV1B Model RXN25JEV1B RXN35JEV1B Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3 ~ 2.8) 2.8 (1.3 ~ 3.5) 3.2 (1.3 ~ 3.5) 3.5 (1.3 ~ 3.7) Capacity Rated (Min.

  • Page 15: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiBE041025 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........6 1.1 Indoor Unit....................6 1.2 Outdoor Unit .....................8 Printed Circuit Board Connector Wiring Diagram...

  • Page 16: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram SiBE041025 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit Connectors and PCB (1): Control PCB Other Parts 1) S6 Connector for swing motor (horizontal blade) 2) S26 Connector for display PCB 3) S32 Connector for indoor heat exchanger thermistor 4) S200 Connector for fan motor...
  • Page 17 SiBE041025 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (1): Control PCB S200 LED A S32 S403 2P206569-4 PCB (2): Display PCB LED2 LED1 (Solder side) RTH1 3P206563-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 18: Outdoor Unit

    Printed Circuit Board Connector Wiring Diagram SiBE041025 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 19 SiBE041025 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (1): Filter PCB E1, E2 3P257381-1 PCB (2): Main PCB S10 J5 LED A W V U 2P259229-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 20: Part 4 Function And Control

    SiBE041025 Part 4 Function and Control 1. Main Functions..................11 1.1 Frequency Principle................11 1.2 Airflow Direction Control.................13 1.3 Fan Speed Control for Indoor Units............14 1.4 Program Dry Operation ................15 1.5 Automatic Operation................16 1.6 Thermostat Control.................17 1.7 NIGHT SET Mode ..................18 1.8 ECONO Operation .................19 1.9 Inverter POWERFUL Operation .............20 1.10 Other Functions..................21 2.

  • Page 21: Main Functions

    SiBE041025 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 22 Main Functions SiBE041025 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 23: Airflow Direction Control

    SiBE041025 Main Functions Airflow Direction Control Power-Airflow The large flap sends a large volume of air downwards to the floor. The flap provides an optimum control in cooling, dry, and heating mode. Flap 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 24: Fan Speed Control For Indoor Units

    Main Functions SiBE041025 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 25: Program Dry Operation

    SiBE041025 Main Functions 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 26: Automatic Operation

    Main Functions SiBE041025 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 27: Thermostat Control

    SiBE041025 Main Functions 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 28: Night Set Mode

    Main Functions SiBE041025 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 29: Econo Operation

    SiBE041025 Main Functions ECONO Operation Outline The "ECONO operation" reduces the maximum operating current and power consumption during start-up etc.. 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 30: Inverter Powerful Operation

    Main Functions SiBE041025 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 31: Other Functions

    SiBE041025 Main Functions 1.10 Other Functions 1.10.1 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 32: Control Specification

    Control Specification SiBE041025 2. Control Specification Function of Thermistor Capillary tube Four way valve Compressor (R11597) A Outdoor Heat 1. In cooling operation, the outdoor heat exchanger thermistor is used for detecting disconnection of the discharge pipe thermistor. When the discharge pipe temperature Exchanger becomes lower than the outdoor heat exchanger temperature, the discharge pipe thermistor Thermistor...

  • Page 33: Mode Hierarchy

    SiBE041025 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 operating mode Forced cooling (for Pump Down Operation)

  • Page 34: Frequency Control

    Control Specification SiBE041025 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 35 SiBE041025 Control Specification 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 (°C)

  • Page 36: Controls At Mode Changing / Start-Up

    Control Specification SiBE041025 Controls at Mode Changing / Start-up 2.4.1 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. Detail ON Condition When the discharge pipe temperature is below 10ºC, the inverter operation in open phase starts.

  • Page 37: Discharge Pipe Temperature Control

    SiBE041025 Control Specification 2.4.4 3-minute Standby Turning on the compressor is prohibited for 3 minutes after turning it off. (Except when defrosting.) 2.4.5 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 38: Input Current Control

    Control Specification SiBE041025 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 39: Freeze-Up Protection Control

    SiBE041025 Control Specification 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 40: Outdoor Fan Control

    Control Specification SiBE041025 Outdoor Fan Control 1. Fan OFF delay when stopped The outdoor fan is turned OFF 70 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 41: Defrost Control

    SiBE041025 Control Specification 2.11 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 42: Malfunctions

    Control Specification SiBE041025 2.12 Malfunctions 2.12.1 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 2.12.2 Detection of Overcurrent and Overload Outline An excessive output current is detected and, the OL temperature is observed to protect the compressor.

  • Page 43: Forced Operation Mode

    SiBE041025 Control Specification 2.13 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 44: Part 5 Operation Manual

    SiBE041025 Part 5 Operation Manual 1. System Configuration................35 2. Operation Manual..................36 2.1 Remote Controller ..................36 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........37 2.3 Adjusting the Airflow Direction..............39 2.4 COMFORT AIRFLOW Operation ............41 2.5 POWERFUL Operation ................42 2.6 ECONO Operation .................43 2.7 OFF TIMER Operation ................44 2.8 ON TIMER Operation ................45...

  • Page 45: System Configuration

    SiBE041025 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 46: Operation Manual

    Operation Manual SiBE041025 2. Operation Manual Remote Controller Names of Parts Remote Controller <Open the front cover> < > ARC433A87 1. Signal transmitter: 8. FAN setting button: • It sends signals to the indoor unit. • It selects the airflow rate setting. 2.

  • Page 47: Auto · Dry · Cool · Heat · Fan Operation

    SiBE041025 Operation Manual 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 48 Operation Manual SiBE041025 AUTO · DRY · COOL · HEAT · FAN Operation To change the airflow rate setting 5. Press AUTO or COOL or HEAT or FAN operation DRY operation 5 levels of airflow rate setting from “ ” to “ ” plus “ ”...

  • Page 49: Adjusting The Airflow Direction

    SiBE041025 Operation Manual Adjusting the Airflow Direction Adjusting the Airflow Direction You can adjust the airflow direction to increase your comfort. To start auto swing Upper and lower airflow direction Press • “ ” is displayed on the LCD. • The flap (horizontal blade) will begin to swing. To set the flap at desired position •...
  • Page 50 Operation Manual SiBE041025 Adjusting the Airflow Direction To adjust the louvers (vertical blades) Hold the knob and move the louvers. (You will find a knob on the left-side and the right-side blades.) • When the unit is installed in the corner of a room, the direction of the louvers should be facing away from the wall.

  • Page 51: Comfort Airflow Operation

    SiBE041025 Operation Manual 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.

  • Page 52: Powerful Operation

    Operation Manual SiBE041025 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 operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.

  • Page 53: Econo Operation

    SiBE041025 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.

  • Page 54: Off Timer Operation

    Operation Manual SiBE041025 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 55: On Timer Operation

    SiBE041025 Operation Manual 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. 1. Press • “ ” disappears from the LCD. “ ”...

  • Page 56: Part 6 Service Diagnosis

    SiBE041025 Part 6 Service Diagnosis 1. Caution for Diagnosis................47 1.1 Troubleshooting with LED ..............47 2. Problem Symptoms and Measures ............48 3. Service Check Function ................49 4. Troubleshooting ..................52 4.1 Error Codes and Description ..............52 4.2 Indoor Unit PCB Abnormality ..............53 4.3 Freeze-up Protection Control or Heating Peak-cut Control....54 4.4 Fan Motor (DC Motor) or Related Abnormality........56 4.5 Thermistor or Related Abnormality (Indoor Unit)........58...

  • Page 57: Caution For Diagnosis

    SiBE041025 Caution for Diagnosis 1. Caution for Diagnosis Troubleshooting with LED Indoor unit The operation 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 58: Problem Symptoms And Measures

    Problem Symptoms and Measures SiBE041025 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 59: Service Check Function

    SiBE041025 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 < ARC433 Series > (R11949) 2.
  • Page 60 Service Check Function SiBE041025 Check Method 2 1. Press the center of the TEMP button and the MODE button at the same time. (R4272) The figure of the ten’s place blinks. (R4273) 2. Press the TEMP▲ or ▼ button and change the figure until you hear the sound of “beep” or “pi pi”.
  • Page 61 SiBE041025 Service Check Function 5. Press the TEMP▲ or ▼ button and change the figure until you hear the sound of “beep”. (R4277) 6. Diagnose by the sound. ★ “pi” : The figure of the ten’s place does not accord with the error code. ★...

  • Page 62: Troubleshooting

    Troubleshooting SiBE041025 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 and outdoor unit) Unspecified voltage (between indoor and outdoor unit) Indoor Indoor unit PCB abnormality Unit Freeze-up protection control or heating peak-cut control...

  • Page 63: Indoor Unit Pcb Abnormality

    SiBE041025 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 64: Freeze-Up Protection Control Or Heating Peak-Cut Control

    Troubleshooting SiBE041025 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 65 SiBE041025 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.86 Is there any short circuit? Provide sufficient air passage. Check the air filter.

  • Page 66: Fan Motor (Dc Motor) Or Related Abnormality

    Troubleshooting SiBE041025 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 67 SiBE041025 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Note: The motor may break when the Check No.18 Turn off the power. motor connector is disconnected (Unplug the power cable or turn while remaining power supply.

  • Page 68: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting SiBE041025 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 69: Signal Transmission Error (Between Indoor And Outdoor Unit)

    SiBE041025 Troubleshooting Signal Transmission Error (between Indoor and Outdoor Unit) Remote Controller Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal. Malfunction Detection Malfunction The data sent from the outdoor unit cannot be received normally, or the content of the data is abnormal.

  • Page 70: Unspecified Voltage (Between Indoor And Outdoor Unit)

    Troubleshooting SiBE041025 Unspecified Voltage (between Indoor 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. Decision Conditions Supposed...

  • Page 71: Outdoor Unit Pcb Abnormality

    SiBE041025 Troubleshooting 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 72: Ol Activation (Compressor Overload)

    Troubleshooting SiBE041025 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 73: Compressor Lock

    SiBE041025 Troubleshooting 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 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 74: Input Overcurrent Detection

    Troubleshooting SiBE041025 4.11 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 14 A Decision Conditions...

  • Page 75: Four Way Valve Abnormality

    SiBE041025 Troubleshooting 4.12 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 76 Troubleshooting SiBE041025 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.05 Refer to P.85 Four way valve coil Correct it. disconnected (loose)? Check No.06 Refer to P.86 Harness out of connector? Reconnect it.

  • Page 77: Discharge Pipe Temperature Control

    SiBE041025 Troubleshooting 4.13 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 78: High Pressure Control In Cooling

    Troubleshooting SiBE041025 4.14 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 about 60°C.
  • Page 79 SiBE041025 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.06 Refer to P.86 Check the installation space. Check No.07 Check No. 07 Refer to P.87 Change the installation Check the installation location or direction.

  • Page 80: Compressor System Sensor Abnormality

    Troubleshooting SiBE041025 4.15 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 81: Position Sensor Abnormality

    SiBE041025 Troubleshooting 4.16 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 The compressor fails to start in about 15 seconds after the compressor run command signal is sent.
  • Page 82 Troubleshooting SiBE041025 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.93 Check the power supply voltage. Voltage as rated? Correct the power supply. Check No.

  • Page 83: Dc Voltage / Current Sensor Abnormality

    SiBE041025 Troubleshooting 4.17 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. (The input current is also below 0.1 A.) Decision If the error repeats 4 times, the system is shut down.

  • Page 84: Thermistor Or Related Abnormality (Outdoor Unit)

    Troubleshooting SiBE041025 4.18 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 85 SiBE041025 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 Refer to P.86 Turn on the power again. Error displayed Reconnect the connectors again on remote...

  • Page 86: Electrical Box Temperature Rise

    Troubleshooting SiBE041025 4.19 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 87 SiBE041025 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.07 WARNING Turn off the power and turn it on Refer to P.87 again. To cool the electrical components, the outdoor fan starts when the radiation fin temperature rises above...

  • Page 88: Radiation Fin Temperature Rise

    Troubleshooting SiBE041025 4.20 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 89 SiBE041025 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.07 Refer to P.87 Turn off the power and turn it on again to start the system. Check No.09 Refer to P.88 Error displayed again?

  • Page 90: Output Overcurrent Detection

    Troubleshooting SiBE041025 4.21 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 91 SiBE041025 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 Check No.07 disconnected and reconnected and the system is interrupted by an output overcurrent, take the following procedure.

  • Page 92: Refrigerant Shortage

    Troubleshooting SiBE041025 4.22 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 Malfunction Refrigerant shortage detection I:...
  • Page 93 SiBE041025 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.06 Refer to P.86 Any thermistor Replace them in position. disconnected? ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗...

  • Page 94: Low-Voltage Detection Or Over-Voltage Detection

    Troubleshooting SiBE041025 4.23 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: Decision...

  • Page 95: Check

    SiBE041025 Check 5. Check How to Check 5.1.1 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...

  • Page 96: Thermistor Resistance Check

    Check SiBE041025 5.1.2 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 97: Installation Condition Check

    SiBE041025 Check 5.1.3 Installation Condition Check Check No.07 Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction. discharge area. Is the discharged Change the installation air short-circuited? location or direction. Is the outdoor heat Clean the outdoor heat exchanger very dirty? exchanger.
  • Page 98 Check SiBE041025 5.1.5 Outdoor Fan System Check Check No.09 AC motor Check the outdoor fan system. Check the fan motor lead wire Does the outdoor fan Reconnect the connector for secure rotate? connector. connection. Are the resistance at connector leads ∞? Replace the fan 1.
  • Page 99 SiBE041025 Check 5.1.6 Power Supply Waveforms Check Check No.10 Measure the power supply waveform between No. 1 and No. 2 on the terminal board, and check the waveform disturbance. Check to see if the power supply waveform is a sine wave. (Fig.1) Check to see if there is waveform disturbance near the zero cross.
  • Page 100 Check SiBE041025 5.1.8 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 101 SiBE041025 Check 5.1.10 Rotation Pulse Check on the Indoor Unit PCB Check No.19 (1) Check the connector for connection. (2) Turn the power on and stop the operation. (3) Check if the Hall IC generates the rotation pulse 4 times when the fan motor is manually rotated once (between the pins 1 and 3).
  • Page 102 Check SiBE041025 5.1.11 Fan Motor Wire / Short Circuit Check Check No.20 (1) Check the connector for connection. (2) Turn the power off. Ω Ω (3) Check if each resistance at the phases U - V and V - W is 90 ~ 100 (between the pins 12 - 9, and between 9 - 6).

  • Page 103: Main Circuit Short Check

    SiBE041025 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 104: Part 7 Removal Procedure

    SiBE041025 Part 7 Removal Procedure 1. Indoor Unit.....................95 1.1 Removal of Air Filter................95 1.2 Removal of Horizontal Blade..............97 1.3 Removal of Front Panel................99 1.4 Removal of Front Grille ................100 1.5 Removal of Electrical Box / Vertical Blades .........102 1.6 Removal of Swing Motor / PCB............107 1.7 Removal of Indoor Heat Exchanger .............111 1.8 Removal of Fan Rotor / Fan Motor............114 1.9 Exchange of Drain Hose ..............117...

  • Page 105: Indoor Unit

    SiBE041025 Indoor Unit 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 106 Indoor Unit SiBE041025 Step Procedure Points Pull out the air filter downward and remove (R11620) 3. Remove the Titanium apatite photocatalytic air- purifying filter. Air filter The Titanium apatite photocatalytic air- Titanium apatite purifying filter is photocatalytic attached to the back of air-purifying filter the air filter.

  • Page 107: Removal Of Horizontal Blade

    SiBE041025 Indoor Unit Removal of Horizontal Blade Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Open the horizontal blade. Horizontal blade (R11622) Unfasten the center The center shaft can be shaft while bending the released easily by bending horizontal blade...
  • Page 108 Indoor Unit SiBE041025 Step Procedure Points Remove the horizontal blade. (R11626) Removal Procedure...

  • Page 109: Removal Of Front Panel

    SiBE041025 Indoor Unit 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 Open the front panel Right side over the position where it stops. Front panel Left side (R11627)

  • Page 110: Removal Of Front Grille

    Indoor Unit SiBE041025 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 Remove the 2 screws, Front grille which fix the front grille to the main body.
  • Page 111 SiBE041025 Indoor Unit Step Procedure Points Lift the lower part up, When reassembling the and remove the front front grille, make sure that grille. the hooks are fastened. (R12040) Removal Procedure...

  • Page 112: Removal Of Electrical Box / Vertical Blades

    Indoor Unit SiBE041025 Removal of Electrical Box / 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. Disconnect the connecting Preparation wires. Remove the front grille according to the “Removal Remove the screw of of Front Grille”.
  • Page 113 SiBE041025 Indoor Unit Step Procedure Points Loosen the screws of Connecting wires Terminal board the terminal board and black (1) ----- power supply disconnect the white (2) ----- power supply connecting wires. red (3) ----- transmission yellow / green ( ----- earth Connecting wires...
  • Page 114 Indoor Unit SiBE041025 Step Procedure Points Disconnect the [S200] connector for the fan motor [S200]. Release the harness. (R12047) Remove the screw of the electrical box. (R12048) Slide the electrical box to the right first and detach the horizontal blade from the electrical box.
  • Page 115 SiBE041025 Indoor Unit Step Procedure Points 3. Remove the vertical blade Narrow the edges of the Hook Hook ASSY. hook to unfasten it. Unfasten the right and Hook left hooks of the fan guard with pliers. (R11646) Fan guard (R11645) Unfasten the 4 hooks at Repeat the same procedure the button.
  • Page 116 Indoor Unit SiBE041025 Step Procedure Points Unfasten the 3 hooks at the shaft mounting part by pressing them with a flat screwdriver. Hook (R8022) Remove the vertical Repeat the same procedure blade ASSY. to remove the vertical blade ASSY on the other side. (R8023) Removal Procedure...

  • Page 117: Removal Of Swing Motor / Pcb

    SiBE041025 Indoor Unit Removal of Swing Motor / 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 shield plate. Preparation Shield plate (1) Remove the electrical box Unfasten the hooks at according to the “Removal...
  • Page 118 Indoor Unit SiBE041025 Step Procedure Points Unfasten the hook, and The connector of the swing disconnect the motor has a hook. connector. Press the hook with a flat screwdriver to unfasten it. (R11651) 3. Remove the display PCB. Unfasten the hook, and release the display PCB ASSY.
  • Page 119 SiBE041025 Indoor Unit Step Procedure Points Disconnect the connector [S27] from the display PCB. The figure shows the [S27]: control PCB component parts of the [S27] display PCB. Operation lamp ON/OFF button (Forced operation ON/OFF button) Signal receiver TIMER lamp (R8010) 4.
  • Page 120 Indoor Unit SiBE041025 Step Procedure Points Disconnect the wire harnesses from the terminal board with pliers. (R12060) Release the 4 hooks. Hook Lift up the upper part of the control PCB and remove it. Control Hook (11943) The figure shows the [S6]: swing motor [S26] component parts of the...

  • Page 121: Removal Of Indoor Heat Exchanger

    SiBE041025 Indoor Unit Removal of Indoor Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Disconnect the refrigerant Preparation piping. Remove the electrical box according to the “Removal Remove the screws of Electrical Box”.
  • Page 122 Indoor Unit SiBE041025 Step Procedure Points Disconnect the flare nut for liquid piping with 2 wrenches. (R8018) 2. Remove the indoor heat When the pipings are exchanger. disconnected, protect the both openings from entering Remove the indoor unit moisture. from the installation plate.
  • Page 123 SiBE041025 Indoor Unit Step Procedure Points Widen the auxiliary piping to the extent of Auxiliary piping 10° ~ 20°. Remove the screw on the left side and Caution Hook Hook unfasten the hook on When removing or the rear side. reassembling the indoor heat exchanger, be sure to wear gloves or wrap it with cloth...

  • Page 124: Removal Of Fan Rotor / Fan Motor

    Indoor Unit SiBE041025 Removal of Fan Rotor / Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the right side Preparation panel. Remove the indoor heat exchanger according to the Remove the screw of “Removal of Indoor Heat...
  • Page 125 SiBE041025 Indoor Unit Step Procedure Points 2. Remove the fan rotor and the fan motor. The fan motor has 3 Fan rotor projections. The fan rotor has a rotating shaft on the left Fan motor side. Lift up the right side of the fan rotor and slide it to the right, then remove it.
  • Page 126 Indoor Unit SiBE041025 Step Procedure Points Press the bearing from outside. Remove the bearing. Bearing (R8049) Pull out the fan motor The magnet of the fan motor from the fan rotor to is united with the fan rotor. Fan motor remove.

  • Page 127: Exchange Of Drain Hose

    SiBE041025 Indoor Unit Exchange of Drain Hose Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the heat After removing the drain insulation fixing screw hose, to prevent water Drain hose on the right side and leakage, make sure to...

  • Page 128: Outdoor Unit

    Outdoor Unit SiBE041025 2. Outdoor Unit Removal of Panels 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 (R10707) Take care not to cut your finger by the fins of the outdoor heat exchanger.
  • Page 129 SiBE041025 Outdoor Unit Step Procedure Points Remove the 3 screws Top panel (right: 1 screw, left: 2 screws) and remove the top panel. Remove the 5 screws of the front panel. (R10711) Front panel Lift up the left side and unfasten the hooks.

  • Page 130: Removal Of Outdoor Fan / Fan Motor

    Outdoor Unit SiBE041025 Removal of Outdoor Fan / Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the outdoor fan. Preparation Remove the panels Release the washer- according to the “Removal fitted nut (M6) of the...
  • Page 131 SiBE041025 Outdoor Unit Step Procedure Points Remove the screw to Put the lead wire through Fan motor fixing frame remove the fan motor the back of the motor when fixing frame. reassembling. (so as not to be entangled with the outdoor fan) Lead wire Outdoor fan...

  • Page 132: Removal Of Electrical Box / Pcb

    Outdoor Unit SiBE041025 Removal of Electrical Box / 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 right side Preparation panel. Remove the panels according to the “Removal Unhook the outdoor of Panels”.
  • Page 133 SiBE041025 Outdoor Unit Step Procedure Points Remove the 4 screws on the right side panel. (R11762) Unfasten the hook on When reassembling, make Hook the rear side. sure to fit the hook. (R11763) Unfasten the hook, and lift up the right side panel to remove.
  • Page 134 Outdoor Unit SiBE041025 Step Procedure Points 2. Remove the thermistors. Pay attention so as not to Release the discharge lose the fixture. pipe thermistor. When reassembling, do not insert the thermistor up to the dent of fixture. Fixture Dent Discharge pipe thermistor (R11765) (R11740) Release the outdoor...
  • Page 135 SiBE041025 Outdoor Unit Step Procedure Points Cut the clamp. (R12051) Release the harnesses. (R11769) Disconnect the [S90]: outdoor temperature [S90] connector for the thermistor, outdoor heat thermistors [S90]. exchanger thermistor, discharge pipe thermistor Remove the thermistor ASSY. (R11770) Removal Procedure...
  • Page 136 Outdoor Unit SiBE041025 Step Procedure Points 3. Remove the electrical box. [S40] Disconnect the connector for overload protector [S40]. (R11771) Disconnect the connector for four way valve coil [S80]. [S80] (R11772) Disconnect the relay connector for the compressor motor. (R11774) Removal Procedure...
  • Page 137 SiBE041025 Outdoor Unit Step Procedure Points Release the harnesses from the hook. (R11775) Unfasten the hook of The electrical box can be the electrical box from removed by lifting itself the partition plate with a without a screwdriver. flat screwdriver. (R7318) Lift and remove the electrical box.
  • Page 138 Outdoor Unit SiBE041025 Step Procedure Points 4. Remove the control PCB. Disconnect the 2 Control PCB terminals of the reactor. Reactor White Brown (R11946) Remove the screw of the terminal board, and pull out the terminals. Terminal board (R11779) Cut the clamp. (R11780) Removal Procedure...
  • Page 139 SiBE041025 Outdoor Unit Step Procedure Points Remove the 3 screws to remove the reactor. Reactor (R11777) Disconnect the 3 [S10] connectors for filter PCB [S10] [HN3] [HL3]. [HN3] [HL3] (R11781) Release the harnesses. (R11782) Removal Procedure...
  • Page 140 Outdoor Unit SiBE041025 Step Procedure Points Remove the 6 screws. Control PCB (R10717) Unfasten the 2 hooks. Lift and remove the control PCB. (R11783) Feature of the control [S10] [HN3] [HL3]: filter PCB [S10] [S90] [S40]: overload protector [S70]: fan motor [S80]: four way valve coil [S70] [S90]: thermistors...
  • Page 141 SiBE041025 Outdoor Unit Step Procedure Points 5. Remove the filter PCB. Earth Remove the screw of the earth wire. Filter (R11785) Cut the clamp. (R11786) Release the harnesses from the hook. (R11787) Removal Procedure...
  • Page 142 Outdoor Unit SiBE041025 Step Procedure Points Remove the screw. (R11788) Unfasten the 2 hooks. (R11789) Removal Procedure...
  • Page 143 SiBE041025 Outdoor Unit Step Procedure Points Release the harnesses. (R11790) Remove the filter PCB. Filter PCB (R11791) Removal Procedure...

  • Page 144: Removal Of Sound Blanket

    Outdoor Unit SiBE041025 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 partition plate. Remove the 2 screws. (R12052) The partition plate has a hook on the lower side.
  • Page 145 SiBE041025 Outdoor Unit Step Procedure Points 2. Remove the sound Since the piping ports on the blanket. sound blanket are torn easily, remove the blanket Lift and remove the carefully. sound blanket (top). Sound blanket (top) (R12054) Pull the sound blankets (outer and inner 2) out.

  • Page 146: Removal Of Four Way Valve

    Outdoor Unit SiBE041025 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 four way valve coil and the putty so as not to burn them.
  • Page 147 SiBE041025 Outdoor Unit Step Procedure Points Remove the putty. (R11800) 2. Remove the four way valve. Caution Be careful not to get yourself Heat up the brazed burnt with the pipes and point (a) and withdraw other parts that are heated by the piping with pliers.
  • Page 148 Outdoor Unit SiBE041025 Step Procedure Points Heat up the 3 brazed If the gas brazing machine fails points of the four way to remove the four way valve, valve. Disconnect the take the steps below. point (b) first. 1. Disconnect the brazed pipe sections that are easy to Disconnect the points separate and join together...

  • Page 149: Removal Of Compressor

    SiBE041025 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 peripheries. Warning Remove the four If refrigerant gas leaks during way valve, the the work, ventilate the room.
  • Page 150 SiBE041025 Part 8 Others 1. Others ....................141 1.1 Trial Operation..................141 1.2 Field Settings..................142 1.3 Application of Silicon Grease to a Power Transistor and a Diode Bridge..................143 Others...

  • Page 151: Part 8 Others

    SiBE041025 Others 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 152: Field Settings

    Others SiBE041025 Field Settings 1.2.1 When 2 Units are Installed in 1 Room How to set the different addresses. 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 153: Application Of Silicon Grease To A Power Transistor And A Diode Bridge

    SiBE041025 Others 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 154: Part 9 Appendix

    SiBE041025 Part 9 Appendix 1. Piping Diagrams..................145 1.1 Indoor Unit....................145 1.2 Outdoor Unit ..................145 2. Wiring Diagrams..................146 2.1 Indoor Unit....................146 2.2 Outdoor Unit ..................147 Appendix...

  • Page 155: Piping Diagrams

    SiBE041025 Piping Diagrams 1. Piping Diagrams Indoor Unit FTXN25/35JEV1B INDOOR UNIT HEAT EXCHANGER 7.0CuT 4.8CuT THERMISTOR 7.0CuT ON HEAT EXCH. 7.0CuT CROSS FLOW FAN FIELD PIPING (6.4CuT) FAN MOTOR FIELD PIPING 9.5CuT (9.5CuT) REFRIGERANT FLOW COOLING HEATING 4D065938A Outdoor Unit RXN25/35JEV1B OUTDOOR UNIT HEAT EXCHANGER...

  • Page 156: Wiring Diagrams

    Wiring Diagrams SiBE041025 2. Wiring Diagrams Indoor Unit FTXN25/35JEV1B PCB 1 PCB 2 FIELD WIRING. TRANSMISSION GRN/YLW LED1 CIRCUIT LED2 RECTIFIER OUTDOOR – MR10 CAUTION NOTE THAT OPERATION WILL t˚ 3.15A RESTART AUTOMATICALLY IF – THE MAIN POWER SUPPLY IS IPM200 TURNED OFF AND THEN BACK SIGNAL...

  • Page 157: Outdoor Unit

    SiBE041025 Wiring Diagrams Outdoor Unit RXN25/35JEV1B FIELD WIRING. indoor outdoor NOTE IN CASE OF IN CASE OF 1.REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. HEAT PUMP COOLING ONLY TYPE CAPACITOR TYPE (OUTDOOR) (DISCHARGE) DIODE BRIDGE (CONDENSER) FUSE INTELLIGENT POWER MODULE LIVE COIL OVERLOAD PROTECTOR...
  • Page 158 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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