Daikin K Series Service Manual
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Daikin K Series Service Manual

Daikin K Series Service Manual

Inverter pair wall mounted type k-series
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Service
Manual
Inverter Pair
Wall Mounted Type K-Series
[Applied Models]
●
Inverter Pair : Heat Pump
SiBE041103

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Summary of Contents for Daikin K Series

  • Page 1 SiBE041103 Service Manual Inverter Pair Wall Mounted Type K-Series [Applied Models] ● Inverter Pair : Heat Pump...
  • Page 2 SiBE041103 Inverter Pair Wall Mounted Type K-Series Heat Pump Indoor Unit FTXN50KV1B FTXN60KV1B Outdoor Unit RXN50KEV1B RXN60KEV1B Table of Contents...

  • Page 3: Table Of Contents

    SiBE041103 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 SiBE041103 2.5 OFF TIMER Operation ................43 2.6 ON TIMER Operation ................44 Part 6 Service Diagnosis............. 45 1. Troubleshooting with LED ..............46 1.1 Indoor Unit....................46 1.2 Outdoor Unit ...................46 2. Problem Symptoms and Measures ............47 3. Service Check Function ................48 3.1 ARC470 Series..................48 4.
  • Page 5 SiBE041103 Part 7 Removal Procedure ............93 1. Indoor Unit.....................94 1.1 Removal of Air Filters / Front Panel ............94 1.2 Removal of Front Grille ................97 1.3 Removal of Horizontal Blades / Vertical Blades ........99 1.4 Removal of Electrical Box / PCBs / Swing Motors .......101 1.5 Removal of Indoor Heat Exchanger .............106 1.6 Removal of Fan Motor / Fan Rotor............109 2.

  • Page 6: Introduction

    Introduction SiBE041103 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 SiBE041103 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 SiBE041103 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 SiBE041103 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 SiBE041103 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

    SiBE041103 Part 1 List of Functions 1. Functions....................2 List of Functions...

  • Page 12: Functions

    Functions SiBE041103 1. Functions Category Functions Category Functions Basic Function Inverter (with Inverter Power Control) Health & Clean Air-Purifying Filter — Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — –15 Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...

  • Page 13: Part 2 Specifications

    SiBE041103 Part 2 Specifications 1. Specifications ..................4 Specifications...

  • Page 14: Specifications

    Specifications SiBE041103 1. Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXN50KV1B FTXN60KV1B Model RXN50KEV1B RXN60KEV1B Outdoor Unit Cooling Heating Cooling Heating 5.0 (1.7 ~ 5.7) 5.5 (1.7 ~ 6.8) 6.0 (1.7 ~ 6.5) 6.3 (1.7 ~ 7.6) Capacity Btu/h 17,100 (5,800 ~ 19,400)

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

    SiBE041103 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................6 2. Outdoor Unit....................8 Printed Circuit Board Connector Wiring Diagram...

  • Page 16: Indoor Unit

    Indoor Unit SiBE041103 1. Indoor Unit Connectors and PCB (1): Control PCB Other Parts 1) S1 Connector for DC fan motor 2) S6 Connector for swing motor (horizontal blades) 3) S21 Connector for centralized control (HA) 4) S26 Connector for buzzer PCB 5) S28 Connector for signal receiver PCB 6) S32...
  • Page 17 SiBE041103 Indoor Unit PCB Detail PCB (1): Control PCB LED A 2P099167-2 PCB (2): Signal Receiver PCB PCB (3): Buzzer PCB 2P099167-2 RTH1 2P099167-2 PCB (4): Display PCB LED1 LED2 2P099167-2 ★ LED3 does not function. Printed Circuit Board Connector Wiring Diagram...

  • Page 18: Outdoor Unit

    Outdoor Unit SiBE041103 2. Outdoor Unit Connectors and PCB (1): Filter PCB Other Parts 1) S11 Connector for [S10] on main PCB 2) HL1, HN1, S Connector for terminal board 3) E1, E2 Terminal for earth 4) HL2, HN2 Connector for [HL3] [HN3] on main PCB 5) HL4, HN4 Connector for [S12] on main PCB 6) FU1...
  • Page 19 SiBE041103 Outdoor Unit PCB Detail PCB (1): Filter PCB FU3 V2 HN4, HL4 HN2 HL2 E2, E1 3P273862-1 PCB (2): Main PCB LED A U, V, W 2P273854-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 20: Part 4 Function And Control

    SiBE041103 Part 4 Function and Control 1. Main Functions..................11 1.1 Temperature Control ................11 1.2 Frequency Principle................11 1.3 Airflow Direction Control.................13 1.4 Fan Speed Control for Indoor Unit ............14 1.5 Program Dry Operation ................15 1.6 Automatic Operation................16 1.7 Thermostat Control.................17 1.8 NIGHT SET Mode ..................18 1.9 Inverter POWERFUL Operation .............19 1.10 Other Functions..................20 2.

  • Page 21: Main Functions

    SiBE041103 Main Functions 1. Main Functions Temperature Control Definitions of The definitions of temperatures are classified as following. Temperatures Room temperature: temperature of lower part of the room Set temperature: temperature set by remote controller Room thermistor temperature: temperature detected by room temperature thermistor Target temperature: temperature determined by microcomputer Target temperature Room thermistor temperature...
  • Page 22 Main Functions SiBE041103 Drawing of The following drawing shows a schematic view of the inverter principle: Inverter Refrigerant circulation rate (high) high speed Amount of heat Amount of heat exchanged air (large) exchanged air (large) high f low f Amount of heat Amount of heat exchanged air (small) exchanged air (small)

  • Page 23: Airflow Direction Control

    SiBE041103 Main Functions Airflow Direction Control Power-Airflow The large flaps send a large volume of air downward to the floor and provide 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 24: Fan Speed Control For Indoor Unit

    Main Functions SiBE041103 Fan Speed Control for Indoor Unit 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 thermistor temperature and the target temperature.

  • Page 25: Program Dry Operation

    SiBE041103 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 SiBE041103 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

    SiBE041103 Main Functions Thermostat Control Thermostat control is based on the difference between the room thermistor 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 SiBE041103 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: Inverter Powerful Operation

    SiBE041103 Main Functions 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 30: Other Functions

    Main Functions SiBE041103 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 31: Function Of Thermistor

    SiBE041103 Function of Thermistor 2. Function of Thermistor Electronic expansion valve Four way valve Compressor (R14247) (1) 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 32: Control Specification

    Control Specification SiBE041103 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. Air conditioner control mode Forced operation mode Forced cooling operation Power transistor test mode...

  • Page 33: Frequency Control

    SiBE041103 Control Specification Frequency Control Outline Frequency is determined according to the difference between the room thermistor 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 thermistor temperature and the target temperature) 3.
  • Page 34 Control Specification SiBE041103 Indoor Frequency Command ( Δ D signal) The difference between the room thermistor temperature and the target temperature is taken as the “ Δ D signal” and is used for frequency command. ΔD ΔD ΔD ΔD Temperature Temperature Temperature Temperature...

  • Page 35: Controls At Mode Changing / Start-Up

    SiBE041103 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. Detail ON Condition When the discharge pipe temperature is below 10°C, the inverter operation in open phase starts.

  • Page 36: Discharge Pipe Temperature Control

    Control Specification SiBE041103 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) Frequency (sec.) Time (R13906) A (Hz) B (Hz) C (Hz) D (Hz) Cooling: 98, Heating: 96...

  • Page 37: Input Current Control

    SiBE041103 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 38: Freeze-Up Protection Control

    Control Specification SiBE041103 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 39: Outdoor Fan Control

    SiBE041103 Control Specification Outdoor Fan Control 1. 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. 2. Fan OFF control while defrosting The outdoor fan is turned OFF while defrosting.

  • Page 40: Defrost Control

    Control Specification SiBE041103 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 are determined with the outdoor temperature and the outdoor heat exchanger temperature.

  • Page 41: Electronic Expansion Valve Control

    SiBE041103 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 42: Pressure Equalizing Control

    Control Specification SiBE041103 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 Equalizing Control When the compressor is stopped, the pressure equalizing control is activated. The electronic expansion valve opens, and develops the pressure equalization.
  • Page 43 SiBE041103 Control Specification 3.11.7 Control for Disconnection of the Discharge Pipe Thermistor Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensing temperature. If the discharge pipe thermistor is disconnected, the electronic expansion valve opens according to the outdoor temperature and the operation frequency, and operates for a specified time, and then stops.

  • Page 44: Malfunctions

    Control Specification SiBE041103 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 45: Part 5 Operation Manual

    SiBE041103 Part 5 Operation Manual 1. System Configuration................36 2. Operation Manual..................37 2.1 Remote Controller ..................37 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........38 2.3 Adjusting the Airflow Direction..............40 2.4 POWERFUL Operation ................42 2.5 OFF TIMER Operation ................43 2.6 ON TIMER Operation ................44 Operation Manual...

  • Page 46: System Configuration

    System Configuration SiBE041103 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 47: Operation Manual

    SiBE041103 Operation Manual 2. Operation Manual Remote Controller Remote Controller <ARC470A5> 1. Signal transmitter: 6. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. 2. Display (LCD): (AUTO/DRY/COOL/HEAT/FAN) (page 9) • It displays the current settings. 7.

  • Page 48: Auto · Dry · Cool · Heat · Fan Operation

    Operation Manual SiBE041103 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 49 SiBE041103 Operation Manual 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 “ ”...

  • Page 50: Adjusting The Airflow Direction

    Operation Manual SiBE041103 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 51 SiBE041103 Operation Manual 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 52: Powerful Operation

    Operation Manual SiBE041103 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 • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.

  • Page 53: Off Timer Operation

    SiBE041103 Operation Manual 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 Press “...

  • Page 54: On Timer Operation

    Operation Manual SiBE041103 ON TIMER Operation ON TIMER Operation To use ON TIMER operation 1. Press “ ” is displayed on the LCD. Each pressing of advances the time setting by 1 hour. The time can be set between 1 to 12 hours. •...

  • Page 55: Part 6 Service Diagnosis

    SiBE041103 Part 6 Service Diagnosis 1. Troubleshooting with LED ..............46 1.1 Indoor Unit....................46 1.2 Outdoor Unit ...................46 2. Problem Symptoms and Measures ............47 3. Service Check Function ................48 3.1 ARC470 Series..................48 4. Troubleshooting ..................51 4.1 Error Codes and Description ..............51 4.2 Indoor Unit PCB Abnormality ..............52 4.3 Freeze-up Protection Control or Heating Peak-cut Control....53 4.4 Fan Motor (DC Motor) or Related Abnormality........55...

  • Page 56: Troubleshooting With Led

    Troubleshooting with LED SiBE041103 1. Troubleshooting with LED Indoor Unit Operation Lamp 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 57: Problem Symptoms And Measures

    SiBE041103 Problem Symptoms and Measures 2. Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page The unit does not operate. Check the power supply. Check if the rated voltage is supplied. — Check the type of the indoor unit. Check if the indoor unit type is compatible with —...

  • Page 58: Service Check Function

    Service Check Function SiBE041103 3. Service Check Function ARC470 Series 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 <ARC470 Series> (R14252) 2.
  • Page 59 SiBE041103 Service Check Function Check Method 2 1. Press the center of the TEMP button and the MODE button at the same time. (R14268) The figure of the ten’s place blinks. (R14269) 2. Press the TEMP button and change the figure until you hear the sound of “beep” or “pi pi”.
  • Page 60 Service Check Function SiBE041103 5. Press the TEMP button and change the figure until you hear the sound of “beep”. (R14273) 6. Diagnose by the sound. ★ “pi” : The figure of the ten’s place does not accord with the error code. ★...

  • Page 61: Troubleshooting

    SiBE041103 Troubleshooting 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 62: Indoor Unit Pcb Abnormality

    Troubleshooting SiBE041103 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 63: Freeze-Up Protection Control Or Heating Peak-Cut Control

    SiBE041103 Troubleshooting Freeze-up Protection Control or Heating Peak-cut Control Remote Controller Display Method of Freeze-up protection control Malfunction During cooling operation, the freeze-up protection control (operation halt) is activated 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 64 Troubleshooting SiBE041103 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Check the air passage. Refer to P.84 Is there any short circuit? Provide sufficient air passage. Check the air filter.

  • Page 65: Fan Motor (Dc Motor) Or Related Abnormality

    SiBE041103 Troubleshooting Fan Motor (DC Motor) or Related Abnormality Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection Malfunction 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 66 Troubleshooting SiBE041103 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.02 Turn off the power supply Refer to P.85 and rotate the fan by hand. Does the fan Replace the indoor rotate smoothly? fan motor.

  • Page 67: Thermistor Or Related Abnormality (Indoor Unit)

    SiBE041103 Troubleshooting 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 68: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    Troubleshooting SiBE041103 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 69: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    SiBE041103 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 70: Outdoor Unit Pcb Abnormality

    Troubleshooting SiBE041103 Outdoor Unit PCB Abnormality Remote Controller Display Method of The system checks to see if the IPM works in order. The system checks to see if the zero-cross signal comes in properly. Malfunction Detection Malfunction The IPM sends no signal. The zero-cross signal is not detected.

  • Page 71: Ol Activation (Compressor Overload)

    SiBE041103 Troubleshooting OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the error repeats, the system is shut down. Reset condition: Continuous run for about 60 minutes without any other error Decision ∗...

  • Page 72: Compressor Lock

    Troubleshooting SiBE041103 4.10 Compressor Lock Remote Controller Display Method of A compressor lock is detected by the current waveform generated when applying high- Malfunction frequency voltage to the motor. Detection Malfunction If the error repeats, the system is shut down. Reset condition: Continuous run for about 11 minutes without any other error Decision Conditions...

  • Page 73: Dc Fan Lock

    SiBE041103 Troubleshooting 4.11 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 ~ 60 seconds (depending on the model) even when the fan motor is running.

  • Page 74: Input Overcurrent Detection

    Troubleshooting SiBE041103 4.12 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 about 15 A Decision (The upper limit of the current decreases when the outdoor temperature exceeds a certain...

  • Page 75: Four Way Valve Abnormality

    SiBE041103 Troubleshooting 4.13 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 SiBE041103 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Four way valve coil Correct it. Refer to P.84 disconnected (loose)? Check No.13 Harness out of connector? Refer to P.87 Reconnect it.

  • Page 77: Discharge Pipe Temperature Control

    SiBE041103 Troubleshooting 4.14 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 A °C, the compressor stops.

  • Page 78: High Pressure Control In Cooling

    Troubleshooting SiBE041103 4.15 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: Compressor System Sensor Abnormality

    SiBE041103 Troubleshooting 4.16 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 80: Position Sensor Abnormality

    Troubleshooting SiBE041103 4.17 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 81 SiBE041103 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Refer to P.88 Turn off the power. Check No.18 Check the power supply voltage. Refer to P.90 Voltage as rated? Correct the power supply.

  • Page 82: Thermistor Or Related Abnormality (Outdoor Unit)

    Troubleshooting SiBE041103 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 83 SiBE041103 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.01 Turn on the power again. Refer to P.84 Error displayed Reconnect the connectors...

  • Page 84: Electrical Box Temperature Rise

    Troubleshooting SiBE041103 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 A °C. The error is cleared when the radiation fin temperature drops below B °C.
  • Page 85 SiBE041103 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 WARNING Turn off the power and turn it on again. To cool the electrical components, Refer to P.90 the outdoor fan starts when the radiation fin temperature rises above C ˚C and stops when it...

  • Page 86: Radiation Fin Temperature Rise

    Troubleshooting SiBE041103 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 A °C. The error is cleared when the radiation fin temperature drops below B °C.
  • Page 87 SiBE041103 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 Turn off the power and turn it on Refer to P.90 again to start the system. Check No.19 Refer to P.91 Error displayed again?

  • Page 88: Output Overcurrent Detection

    Troubleshooting SiBE041103 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 89 SiBE041103 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 ∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement, check the Refer to P.88 wiring again.

  • Page 90: Refrigerant Shortage

    Troubleshooting SiBE041103 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 Refrigerant shortage detection II: Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of...
  • Page 91 SiBE041103 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Refer to P.84 Any thermistor Replace them in position. disconnected? ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗...

  • Page 92: Low-Voltage Detection Or Over-Voltage Detection

    Troubleshooting SiBE041103 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: The voltage detected by the DC voltage detection circuit is below 150 ~ 180 V (depending on...
  • Page 93 SiBE041103 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the supply voltage. Supply voltage as Correct the power supply. specified? Check the connection of the compressor harness. Loose or Reconnect it.

  • Page 94: Check

    Check SiBE041103 5. Check Thermistor Resistance Check Check No.01 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 95: Fan Motor Connector Check

    SiBE041103 Check Fan Motor Connector Check Check No.02 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. Check the rotation command voltage (pins 4 - 2). 5.

  • Page 96: Electronic Expansion Valve Check

    Check SiBE041103 Electronic Expansion Valve Check Check No.12 Conduct the followings to check the electronic expansion valve (EV). 1. Check to see if the EV connector is correctly connected to the PCB. 2. Turn the power off and on again, and check to see if the EV generate latching sound. 3.

  • Page 97: Four Way Valve Performance Check

    SiBE041103 Check Four Way Valve Performance Check Check No.13 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 98: Inverter Checker" Check

    Check SiBE041103 “Inverter Checker” Check Check No.15 Characteristics If abnormal stop occurs due to compressor startup failure or overcurrent output when using inverter unit, it is difficult to judge whether it is caused by the compressor failure or other failure (control PCB, power module, etc.).

  • Page 99: Rotation Pulse Check On The Outdoor Unit Pcb

    SiBE041103 Check Diagnose method (Diagnose according to 6 LEDs lighting status.) (1) When all the LEDs are lit uniformly, the compressor is defective. → Replace the compressor. (2) When the LEDs are not lit uniformly, check the power module. → Refer to Check No.13.

  • Page 100: Installation Condition Check

    Check SiBE041103 Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction. discharge area. Is the discharged air Change the installation short-circuited? location or direction. Is the outdoor heat Clean the outdoor heat exchanger very dirty? exchanger.

  • Page 101: Outdoor Fan System Check

    SiBE041103 Check 5.11 Outdoor Fan System Check Check No.19 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) 5.12 Main Circuit Short Check Check No.20 Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approx.

  • Page 102: Power Module Check

    Check SiBE041103 5.13 Power Module Check Check No.22 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 103: Part 7 Removal Procedure

    SiBE041103 Part 7 Removal Procedure 1. Indoor Unit.....................94 1.1 Removal of Air Filters / Front Panel ............94 1.2 Removal of Front Grille ................97 1.3 Removal of Horizontal Blades / Vertical Blades ........99 1.4 Removal of Electrical Box / PCBs / Swing Motors .......101 1.5 Removal of Indoor Heat Exchanger .............106 1.6 Removal of Fan Motor / Fan Rotor............109 2.

  • Page 104: Indoor Unit

    Indoor Unit SiBE041103 1. Indoor Unit Removal of Air Filters / 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 Warning Dangerous: High voltage A high voltage is applied to all the electric circuits of this product including...
  • Page 105 SiBE041103 Indoor Unit Step Procedure Points 2. Remove the Titanium apatite photocatalytic air- purifying filters. Push up the bottom of The right and left filters are the Titanium apatite interchangeable. photocatalytic air- Hook purifying filter to unfasten the hooks (2 on lower, 3 on upper) and take the filter out.
  • Page 106 Indoor Unit SiBE041103 Step Procedure Points 3. Remove the front panel. While opening the front panel further than it stops, release both the shafts and remove the front panel. Slide the front panel from side to side to release each shaft.

  • Page 107: Removal Of Front Grille

    SiBE041103 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 1. Remove the service Preparation cover. Remove the front panel according to "Removal of the Remove the screw and Air Filters / Front Panel".
  • Page 108 Indoor Unit SiBE041103 Step Procedure Points Unfasten the 3 hooks The convex marks (...) on on the top of the front the front panel indicate the Hook grille. position of the hooks. (R2759) Hook (R2760) Pull the upper part of Make sure that all the 3 the front grille out and hooks are engaged securely...

  • Page 109: Removal Of Horizontal Blades / Vertical Blades

    SiBE041103 Indoor Unit Removal of Horizontal Blades / Vertical 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 blades. Open the horizontal blades.
  • Page 110 Indoor Unit SiBE041103 Step Procedure Points 2. Remove the vertical Remove the fan guards blades. beforehand. The unit has 3 sets of Release the right and vertical blades linked one left shafts. Vertical blade another with interlock rods. (R6705) Unfasten the 3 hooks for each set of vertical blades.

  • Page 111: Removal Of Electrical Box / Pcbs / Swing Motors

    SiBE041103 Indoor Unit Removal of Electrical Box / PCBs / Swing Motors 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 electrical Preparation box.
  • Page 112 Indoor Unit SiBE041103 Step Procedure Points Remove the screw and You can remove the Terminal board remove the terminal electrical box without board. detaching the terminal board. Screw: M4 × 30 (R2773) Disconnect the connector for the fan [S1] motor [S1]. (R2774) Disconnect the [S6]: for horizontal blades...
  • Page 113 SiBE041103 Indoor Unit Step Procedure Points Dislocate the electrical The electrical box has a box to the left and hook on its back. unfasten the back hook. Pull the electrical box Catch the back hook of the out. electrical box when reassembling.
  • Page 114 Indoor Unit SiBE041103 Step Procedure Points Press the signal receiver unit down and unfasten the hooks on the upper side, and then unfasten the hooks on the lower side. Signal receiver unit (R14255) Cut the clamp. The signal receiver unit Remove the signal receiver Signal receiver PCB Display PCB...
  • Page 115 SiBE041103 Indoor Unit Step Procedure Points Unfasten the 2 hooks on the lower side, and then the 2 hooks on the Upper hook upper side. Remove the control PCB. Control PCB Lower hook (R2785) [S1]: DC fan motor [S6]: swing motor for horizontal blades [S26]: buzzer PCB [S28]: signal receiver PCB...

  • Page 116: Removal Of Indoor Heat Exchanger

    Indoor Unit SiBE041103 Removal of Indoor 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 Preparation piping. Remove the electrical box according to the “Removal of Hold the indoor unit up Electrical Box / PCBs /...
  • Page 117 SiBE041103 Indoor Unit Step Procedure Points 2. Remove the indoor unit. Remove the indoor unit from the installation plate. 3. Remove the indoor heat exchanger. Unfasten the hook of the piping fixture at the back of the indoor unit and pull out the piping. Piping fixture (R2798) Widen the auxiliary...
  • Page 118 Indoor Unit SiBE041103 Step Procedure Points Unfasten the hooks on Caution the left side. When removing or reassembling the indoor heat exchanger, be sure to wear protective gloves or wrap the indoor heat exchanger with cloths. (You may be injured Hook by the fins.) (R13231)

  • Page 119: Removal Of Fan Motor / Fan Rotor

    SiBE041103 Indoor Unit Removal of Fan Motor / Fan Rotor 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 plate. Remove the 2 screws. You can remove the fan rotor without detaching the right side plate.
  • Page 120 Indoor Unit SiBE041103 Step Procedure Points Remove the fan motor. When reassembling the fan motor and the fan rotor, provide as much as 5 mm of play between the side face of the rotor and the bottom frame. Fan motor (R12897) Side face of Side face of rotor...

  • Page 121: Outdoor Unit

    SiBE041103 Outdoor Unit 2. Outdoor Unit Removal of Outer Panels 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 3 screws Take care not to cut your Top panel and lift the top panel.
  • Page 122 Outdoor Unit SiBE041103 Step Procedure Points Unfasten the right side hooks. (R14284) Unfasten the left side When reassembling, fit the hooks. left side of the front panel Remove the front panel. first. (R14285) Remove the screw of the stop valve cover. Stop valve cover (R14286) Removal Procedure...
  • Page 123 SiBE041103 Outdoor Unit Step Procedure Points Pull down the stop valve cover to unfasten the hooks and remove it. (R14279) The stop valve cover has 5 hooks. (R14280) Removal Procedure...

  • Page 124: Removal Of Outdoor Fan / Fan Motor

    Outdoor Unit SiBE041103 Removal of Outdoor Fan / 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 Remove the shield Preparation Shield plate plate. Remove the top panel and the front panel according to the “Removal of Outer...
  • Page 125 SiBE041103 Outdoor Unit Step Procedure Points Release the fan The harnesses of [S70] and [S20] motor lead wire from [S20] cross each other. the groove and the 2 hooks of the partition plate. (R14448) (R14304) Remove the nut of Nut size: M6 Outdoor fan the outdoor fan.
  • Page 126 Outdoor Unit SiBE041103 Step Procedure Points Remove the screw of Fan motor fixing frame the fan motor fixing frame. (R14293) Pull down the fan motor fixing frame to unfasten the 2 hooks at the bottom. Hook (R14294) Remove the fan motor fixing frame.
  • Page 127 SiBE041103 Outdoor Unit Step Procedure Points Open the hook and release the fan motor lead wire. Hook (R14296) 10 Remove the 4 screws and remove the fan Fan motor motor. (R14297) Removal Procedure...

  • Page 128: Removal Of Electrical Box

    Outdoor Unit SiBE041103 Removal of 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 Remove the 3 screws and remove the wire clamp. Wire clamp (R14298) Remove the screws and remove the...
  • Page 129 SiBE041103 Outdoor Unit Step Procedure Points Remove the 6 screws of the right side panel. Right side panel (R14301) Unfasten the 2 lower When reassembling, insert hooks and the 1 upper the 2 lower hooks and the 1 hook. upper hook of the back. Remove the right side panel.
  • Page 130 Outdoor Unit SiBE041103 Step Procedure Points Pull out the outdoor heat exchanger thermistor. Outdoor heat exchanger thermistor (R14376) Peel off the filament tape. (R14288) Disconnect the connector for the fan [S70] motor [S70]. (R14289) Removal Procedure...
  • Page 131 SiBE041103 Outdoor Unit Step Procedure Points 10 Disconnect the [S80] connector for the four way valve coil [S80]. (R14308) 11 Pull out the clamp. (R14309) 12 Disconnect the [S20] connector for the electronic expansion valve coil [S20]. (R14305) 13 Pull out the clamp. (R14306) Removal Procedure...
  • Page 132 Outdoor Unit SiBE041103 Step Procedure Points 14 Remove the wire saddle. Wire saddle (R14307) 15 Disconnect the Insert the clamps of [S40] connector for the harnesses as below. overload protector [S40] [S80] [S20] [S40]. (R14363) (R14310) 16 Pull out the clamp. When reassembling, connect the connectors in the following order.
  • Page 133 SiBE041103 Outdoor Unit Step Procedure Points 18 Release the harness of the relay connector from the wire saddle. (R14313) 19 Disconnect the [S90] connector for the thermistor [S90]. (R14314) 20 Pull out the clamp. When reassembling, insert the clamp as below. (R14315) [S90] (R14435)
  • Page 134 Outdoor Unit SiBE041103 Step Procedure Points 22 Pull out the clamp. (R14317) 23 Remove the screw. (R14318) 24 Pull out the 2 clamps at When reassembling, insert the bottom of the the 2 clamps of the electrical box. thermistor ASSY into the holes as below.
  • Page 135 SiBE041103 Outdoor Unit Step Procedure Points 25 Remove the electrical box. (R14321) Removal Procedure...

  • Page 136: Removal Of Pcbs

    Outdoor Unit SiBE041103 Removal of PCBs 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 main PCB. [S12]: for [HL4] [HN4] on filter Disconnect the Main PCB [S12]...
  • Page 137 SiBE041103 Outdoor Unit Step Procedure Points Pull out the clamp. When reassembling, insert the clamp as below. [HL2] (blue) [HN2] (white) (R14325) (R14379) Remove the 2 upper screws. (R14326) Remove the 1 lower screw. (R14327) Removal Procedure...
  • Page 138 Outdoor Unit SiBE041103 Step Procedure Points Lift the main PCB Main PCB ASSY ASSY. (R14328) Unfasten the 4 hooks at the bottom. (R14329) Remove the 8 screws. (R14330) Removal Procedure...
  • Page 139 SiBE041103 Outdoor Unit Step Procedure Points 10 Unfasten the 2 hooks. Refer to page 9 for detail. (R14331) 11 Remove the main PCB. [S10]: filter PCB [S80] [S70] [S20] [S40] [S90] [S12]: filter PCB [S10] [S20]: electronic expansion [S12] valve coil [S40]: overload protector [S70]: fan motor [S80]: four way valve coil...
  • Page 140 Outdoor Unit SiBE041103 Step Procedure Points 3. Remove the filter PCB. Remove the earth screw. Earth (R14335) Pull out the terminals (1): black (1) (2) (3) from the terminal board. (2): white (3): red Terminal board (R14336) Pull out the clamp. (R14337) Release the harnesses from the groove.
  • Page 141 SiBE041103 Outdoor Unit Step Procedure Points Remove the 2 screws. (R14365) Unfasten the 3 hooks of the filter PCB ASSY. (R14366) (R14367) Remove the 1 screw. (R14368) Removal Procedure...
  • Page 142 Outdoor Unit SiBE041103 Step Procedure Points Unfasten the 2 hooks. (R14369) Remove the filter PCB. Refer to page 9 for detail. (R14370) Removal Procedure...

  • Page 143: Removal Of Sound Blankets

    SiBE041103 Outdoor Unit Removal of Sound Blankets 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 partition plate. Remove the 2 screws. (R14371) Pull out the clamp from Partition plate the partition plate.
  • Page 144 Outdoor Unit SiBE041103 Step Procedure Points 2. Remove the sound Since the piping ports are Discharge pipe blankets. torn easily, remove the temperature thermistor sound blanket carefully. Release the discharge pipe temperature Be careful not to lose the clip thermistor. for the thermistor.
  • Page 145 SiBE041103 Outdoor Unit Step Procedure Points Remove the sound blanket (side-outer). Sound blanket (side-outer) (R14347) Remove the sound blanket (side-inner). Sound blanket (side-inner) (R14348) Removal Procedure...

  • Page 146: Removal Of Electronic Expansion Valve Assy

    Outdoor Unit SiBE041103 Removal of Electronic Expansion Valve ASSY Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Pull out the electronic Electronic expansion valve coil expansion valve coil.

  • Page 147: Removal Of Four Way Valve

    SiBE041103 Outdoor Unit Removal of Four Way Valve 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 screw and remove the four way Warning Four way valve coil.

  • Page 148: Removal Of Compressor

    Outdoor Unit SiBE041103 Removal of Compressor 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 terminal Terminal cover cover. (R14343) Disconnect the compressor lead wires Blue (W) and the overload Red (U)
  • Page 149 SiBE041103 Outdoor Unit Step Procedure Points Remove the 3 nuts of Cautions for restoration the compressor. 1. Restore the piping by non-oxidation brazing. 2. It is required to prevent the carbonization of the oil inside the four way valve and the Before working, make deterioration of the gaskets sure that the refrigerant...

  • Page 150: Part 8 Trial Operation And Field Settings

    SiBE041103 Part 8 Trial Operation and Field Settings 1. Pump Down Operation................141 2. Forced Cooling Operation ..............142 3. Trial Operation ..................143 4. Field Settings ..................144 4.1 When 2 Units are Installed in 1 Room..........144 4.2 Jumper Settings ...................144 5. Application of Silicon Grease to a Power Transistor and a Diode Bridge ... 145 Trial Operation and Field Settings...

  • Page 151: Pump Down Operation

    SiBE041103 Pump Down Operation 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing the unit. Detail 1) Remove the valve caps from the liquid stop valve and the gas stop valve. 2) Carry out forced cooling operation.

  • Page 152: Forced Cooling Operation

    Forced Cooling Operation SiBE041103 2. Forced Cooling Operation Item Forced Cooling Conditions The forced cooling operation is allowed when both the following conditions are met. 1) The outdoor unit is not abnormal and not in the 3-minute standby mode. 2) The outdoor unit is not operating. Start The forced cooling operation starts when any of the following conditions is fulfilled.

  • Page 153: Trial Operation

    SiBE041103 Trial Operation 3. 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 louver movement, are working properly.

  • Page 154: Field Settings

    Field Settings SiBE041103 4. Field Settings 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 address. Both the indoor unit PCB and the wireless remote controller need alteration.

  • Page 155: Application Of Silicon Grease To A Power Transistor And A Diode Bridge

    SiBE041103 Application of Silicon Grease to a Power Transistor and a Diode Bridge 5. 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 156: Part 9 Appendix

    SiBE041103 Part 9 Appendix 1. Piping Diagrams..................147 1.1 Indoor Unit....................147 1.2 Outdoor Unit ..................147 2. Wiring Diagrams..................148 2.1 Indoor Unit....................148 2.2 Outdoor Unit ..................148 Appendix...

  • Page 157: Piping Diagrams

    SiBE041103 Piping Diagrams 1. Piping Diagrams Indoor Unit FTXN50/60KV1B INDOOR UNIT ( 7.9CuT ) HEAT EXCHANGER THERMISTOR ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING ( 6.4CuT ) FAN MOTOR FIELD PIPING ( 12.7CuT ) ( 12.7CuT ) REFRIGERANT FLOW COOLING HEATING 4D040081X...

  • Page 158: Wiring Diagrams

    Wiring Diagrams SiBE041103 2. Wiring Diagrams Indoor Unit FTXN50/60KV1B FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A OUTDOOR t° CAUTION TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS PCB4 TURNED OFF AND THEN BACK ON AGAIN. LED1 LED2 : FRAME GROUND...
  • Page 159 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorised parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

This manual is also suitable for:

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