Daikin G-Series Service Manual
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Daikin G-Series Service Manual

Daikin G-Series Service Manual

Inverter pair wall mounted type g-series
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SiBE041029
Inverter Pair
Wall Mounted Type G-Series
[Applied Models]
Inverter Pair : Heat Pump

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Summary of Contents for Daikin G-Series

  • Page 1 SiBE041029 Inverter Pair Wall Mounted Type G-Series [Applied Models] Inverter Pair : Heat Pump...
  • Page 2 SiBE041029 Inverter Pair Wall Mounted Type G-Series Heat Pump Indoor Units FTX50GV1B FTX60GV1B FTX71GV1B Outdoor Units RX50G2V1B RX60G2V1B RX71GV1B Table of Contents...

  • Page 3: Table Of Contents

    SiBE041029 1. Introduction .....................v 1.1 Safety Cautions ..................v 1.2 Used Icons ....................ix Part 1 List of Functions ..............1 1. Functions....................2 Part 2 Specifications ..............3 1. Specifications ..................4 Part 3 Printed Circuit Board Connector Wiring Diagram ..... 6 1.
  • Page 4 SiBE041029 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........43 2.3 Adjusting the Airflow Direction..............45 2.4 POWERFUL Operation ................47 2.5 OUTDOOR UNIT QUIET Operation............48 2.6 HOME LEAVE Operation ...............49 2.7 INTELLIGENT EYE Operation ...............51 2.8 TIMER Operation ...................53 Part 6 Service Diagnosis.............
  • Page 5 SiBE041029 2. Outdoor Unit - RX50/60G2V1B ............122 2.1 Removal of Outer Panels ..............122 2.2 Removal of Fan Motor / Outdoor Fan...........126 2.3 Removal of Electrical Box ..............130 2.4 Removal of PCB...................134 2.5 Removal of Sound Blanket / Thermistors..........137 2.6 Removal of Four Way Valve..............139 2.7 Removal of Electronic Expansion Valve..........140 2.8 Removal of Compressor...............141 3.

  • Page 6: Introduction

    Introduction SiBE041029 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 SiBE041029 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 SiBE041029 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 SiBE041029 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 SiBE041029 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

    SiBE041029 Part 1 List of Functions 1. Functions....................2 List of Functions...

  • Page 12: Functions

    Functions SiBE041029 1. Functions Category Functions Category Functions Basic Function Inverter (with Inverter Power Control) Health & Clean Air-Purifying Filter — –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — –15 Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...

  • Page 13: Part 2 Specifications

    SiBE041029 Part 2 Specifications 1. Specifications ..................4 Specifications...

  • Page 14: Specifications

    Specifications SiBE041029 1. Specifications 50 Hz, 220 - 230 - 240 V Indoor Units FTX50GV1B FTX60GV1B Model RX50G2V1B RX60G2V1B Outdoor Units Cooling Heating Cooling Heating 5.0 (1.7 ~ 6.0) 5.8 (1.7 ~ 7.7) 6.0 (1.7 ~ 6.7) 7.0 (1.7 ~ 8.0) Capacity Btu/h 17,100 (5,800 ~ 20,500)
  • Page 15 SiBE041029 Specifications 50 Hz, 220 - 230 - 240V Indoor Units FTX71GV1B Model RX71GV1B Outdoor Units Cooling Heating 7.1 (2.3 ~ 8.5) 8.2 (2.3 ~ 10.2) Capacity Btu/h 24,200 (7,800 ~ 29,000) 28,000 (7,800 ~ 34,800) Rated (Min. ~ Max.) kcal/h 6,110 (1,980 ~ 7,310) 7,050 (1,980 ~ 8,770)

  • Page 16: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiBE041029 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........7 1.1 Indoor Unit....................7 1.2 Outdoor Unit .....................9 Printed Circuit Board Connector Wiring Diagram...

  • Page 17: Printed Circuit Board Connector Wiring Diagram

    SiBE041029 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram 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) S8 Connector for swing motor (vertical blades) 4) S21 Connector for centralized control (HA)
  • Page 18 Printed Circuit Board Connector Wiring Diagram SiBE041029 PCB Detail PCB (1): Control PCB LED A 2P099167-1 PCB (2): Signal Receiver PCB PCB (3): Buzzer PCB 2P099167-1 RTH1 2P099167-1 PCB (4): Display PCB PCB (5): INTELLIGENT EYE Sensor PCB LED1 LED2 LED3 2P099167-1 3P099913-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 19: Outdoor Unit

    SiBE041029 Printed Circuit Board Connector Wiring Diagram Outdoor Unit Connectors and PCB (1): Main PCB Other Parts 1) S10 Connector for terminal board (indoor - outdoor transmission) 2) S20 Connector for electronic expansion valve coil 3) S40 Connector for overload protector 4) S51, S101 Connector for service monitor PCB 5) S70...
  • Page 20 Printed Circuit Board Connector Wiring Diagram SiBE041029 PCB Detail PCB (1): Main PCB (50/60 model) AC1 E1 (3.15A) (30A) S101 2P169046-1 (3.15A) PCB (1): Main PCB (71 model) E1 E2 (3.15A) V100 (30A) (white) (blue) S101 W V U 2P171491-7 (3.15A) Printed Circuit Board Connector Wiring Diagram...
  • Page 21 SiBE041029 Printed Circuit Board Connector Wiring Diagram PCB (2): Service Monitor PCB LED A SW4-C S102 3P169059-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 22: Part 4 Function And Control

    SiBE041029 Part 4 Function and Control 1. Main Functions..................13 1.1 Frequency Principle................13 1.2 Airflow Direction Control.................15 1.3 Fan Speed Control for Indoor Units............16 1.4 Program Dry Operation ................17 1.5 Automatic Operation................18 1.6 Thermostat Control.................19 1.7 NIGHT SET Mode ..................20 1.8 HOME LEAVE Operation ...............21 1.9 INTELLIGENT EYE Operation ...............22 1.10 Inverter POWERFUL Operation .............23 1.11 Other Functions..................24...

  • Page 23: Main Functions

    SiBE041029 Main Functions 1. Main Functions Frequency Principle Main Control The compressor is frequency-controlled during normal operation. The target frequency is set by the following 2 parameters coming from the operating indoor unit: Parameters The load condition of the operating indoor unit The difference between the room temperature and the target temperature Additional The target frequency is adapted by additional parameters in the following cases:...
  • Page 24 Main Functions SiBE041029 Inverter Features The inverter provides the following features: The regulating capacity can be changed according to the changes in the outdoor temperature and cooling / heating load. Quick heating and quick cooling The compressor rotational speed is increased when starting the heating (or cooling). This enables to reach the set temperature quickly.

  • Page 25: Airflow Direction Control

    SiBE041029 Main Functions Airflow Direction Control Power-Airflow The large flaps send a large volume of air downwards to the floor. The flap provides an optimum control in cooling, dry, and heating mode. Dual Flaps Cooling / Dry Mode During cooling or dry mode, the flap retracts into the indoor unit. Then, cool air can be blown far and pervaded all over the room.

  • Page 26: Fan Speed Control For Indoor Units

    Main Functions SiBE041029 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 27: Program Dry Operation

    SiBE041029 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 28: Automatic Operation

    Main Functions SiBE041029 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 29: Thermostat Control

    SiBE041029 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 30: Night Set Mode

    Main Functions SiBE041029 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 31: Home Leave Operation

    SiBE041029 Main Functions HOME LEAVE Operation Outline HOME LEAVE operation is a function that allows you to record your favorite set temperature and airflow rate. You can start your favorite operation mode simply by pressing the [HOME LEAVE] button on the remote controller. Detail 1.

  • Page 32: Intelligent Eye Operation

    Main Functions SiBE041029 INTELLIGENT EYE Operation Outline This is the function that detects existence of humans in the room by a human motion sensor (INTELLIGENT EYE) and reduces the capacity when there is nobody in the room in order to save electricity.

  • Page 33: Inverter Powerful Operation

    SiBE041029 Main Functions 1.10 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Detail When POWERFUL button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes.

  • Page 34: Other Functions

    Main Functions SiBE041029 1.11 Other Functions 1.11.1 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 35: Function Of Thermistor

    SiBE041029 Function of Thermistor 2. Function of Thermistor Four way valve Compressor (R11582) A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge pipe temperature. The system sets the target discharge pipe temperature according to the Exchanger outdoor and indoor heat exchanger temperature, and controls the electronic expansion valve Thermistor...

  • Page 36: Control Specification

    Control Specification SiBE041029 3. Control Specification Mode Hierarchy Outline There are two modes; the one is the normal operation mode and the other is the forced operation mode for installation and providing service. Detail There are following modes; stop, cooling (includes drying), heating (include defrosting) Air conditioner control mode Forced operating mode Forced cooling (for Pump Down Operation)

  • Page 37: Frequency Control

    SiBE041029 Control Specification Frequency Control Outline Frequency is determined according to the difference between the room temperature and the target temperature. The function is explained as follows. 1. How to determine frequency 2. Frequency command from the indoor unit (Difference between the room temperature and the target temperature) 3.
  • Page 38 Control Specification SiBE041029 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 39: Controls At Mode Changing / Start-Up

    SiBE041029 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 outdoor temperature, the discharge pipe temperature, and the radiation fin temperature (internal temperature of PM1). Outside temperature ≥...

  • Page 40: Discharge Pipe Temperature Control

    Control Specification SiBE041029 3.3.4 3-minute Standby Turning on the compressor is prohibited for 3 minutes after turning it off. (Except when defrosting.) 3.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. (The function is not activated when defrosting.) (Hz) Frequency...

  • Page 41: Input Current Control

    SiBE041029 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 42: Freeze-Up Protection Control

    Control Specification SiBE041029 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 43: Outdoor Fan Control

    SiBE041029 Control Specification Outdoor Fan Control 1. Fan OFF delay when stopped The outdoor fan is turned OFF 60 seconds after the compressor stops. 2. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF.
  • Page 44 Control Specification SiBE041029 PI control Frequency 0 Hz 120 sec. 60 sec. sec. (Max. limit) sec. Compressor Four way valve 5 sec. 5 sec. pulse pulse pulse Electronic expansion Initial opening valve opening (R11969) 50 class 60 class 71 class (Hz) (Hz) (seconds)

  • Page 45: Electronic Expansion Valve Control

    SiBE041029 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 46: Pressure Equalization Control

    Control Specification SiBE041029 3.11.1 Fully Closing with Power ON The electronic expansion valve is initialized when turning on the power. The opening position is set and the pressure equalization is developed. 3.11.2 Pressure Equalization Control When the compressor is stopped, the pressure equalization control is activated. The electronic expansion valve opens, and develops the pressure equalization.
  • Page 47 SiBE041029 Control Specification 3.11.6 Disconnection of the Discharge Pipe Thermistor Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensation 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 48: Malfunctions

    Control Specification SiBE041029 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 Relating to CT Malfunction When the output frequency is more than Hz and the input current is below A, it is judged...

  • Page 49: Forced Operation Mode

    SiBE041029 Control Specification 3.13 Forced Operation Mode Outline Forced operation mode includes only forced cooling. Detail Item Forced Cooling Conditions 1) The outdoor unit is not abnormal and not in the 3-minute standby mode. 2) The outdoor unit is not operating. The forced operation is allowed when the above both conditions are met.

  • Page 50: Part 5 Operation Manual

    SiBE041029 Part 5 Operation Manual 1. System Configuration................41 2. Operation Manual..................42 2.1 Remote Controller ..................42 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........43 2.3 Adjusting the Airflow Direction..............45 2.4 POWERFUL Operation ................47 2.5 OUTDOOR UNIT QUIET Operation............48 2.6 HOME LEAVE Operation ...............49 2.7 INTELLIGENT EYE Operation ...............51 2.8 TIMER Operation ...................53...

  • Page 51: System Configuration

    SiBE041029 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 52: Operation Manual

    Operation Manual SiBE041029 2. Operation Manual Remote Controller Remote Controller < > ARC433B70 1. Signal transmitter: 8. QUIET button: OUTDOOR UNIT QUIET • It sends signals to the indoor unit. operation (page 15.) 2. Display: 9. FAN setting button: • It displays the current settings. •...

  • Page 53: Auto · Dry · Cool · Heat · Fan Operation

    SiBE041029 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 54 Operation Manual SiBE041029 To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or HEAT or COOL or FAN mode Five levels of air flow rate setting from “ ” to “ ” plus “ ”...

  • Page 55: Adjusting The Airflow Direction

    SiBE041029 Operation Manual Adjusting the Airflow Direction Adjusting the Air Flow Direction You can adjust the air flow direction to increase your comfort. To adjust the horizontal blade (flap) 1. Press “SWING button ”. • “ ” is displayed on the LCD and the flaps will begin to swing.
  • Page 56 Operation Manual SiBE041029 To 3-D Airflow 1. 3. Press the “SWING button ” and the “SWING button ”: the “ ” and “ ” display will light up and the flap and louvers will move in turn. To cancel 3-D Airflow 2.

  • Page 57: Powerful Operation

    SiBE041029 Operation Manual POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity. To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used before POWERFUL operation.

  • Page 58: Outdoor Unit Quiet Operation

    Operation Manual SiBE041029 OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is convenient during night. To start OUTDOOR UNIT QUIET operation 1.

  • Page 59: Home Leave Operation

    SiBE041029 Operation Manual HOME LEAVE Operation HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and air flow rate settings. To start HOME LEAVE operation 1. Press “HOME LEAVE button”. • “ ”...
  • Page 60 Operation Manual SiBE041029 What’s the HOME LEAVE operation? Is there a set temperature and air flow rate which is most comfortable, a set temperature and air flow rate which you use the most? HOME LEAVE operation is a function that allows you to record your favorite set temperature and air flow rate.

  • Page 61: Intelligent Eye Operation

    SiBE041029 Operation Manual INTELLIGENT EYE Operation INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ” is displayed on the LCD. To cancel the INTELLIGENT EYE operation 2.
  • Page 62 Operation Manual SiBE041029 “INTELLIGENT EYE” is useful for Energy Saving. Energy saving operation • Change the temperature –2°C in heating / +2°C in cooling / +1°C in dry mode from set temperature. • Decrease the air flow rate slightly in fan operation. (In FAN mode only) Notes on “INTELLIGENT EYE”...

  • Page 63: Timer Operation

    SiBE041029 Operation Manual TIMER Operation TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER operation •...
  • Page 64 Operation Manual SiBE041029 To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.

  • Page 65: Part 6 Service Diagnosis

    SiBE041029 Part 6 Service Diagnosis 1. Caution for Diagnosis................56 1.1 Troubleshooting with LED ..............56 2. Problem Symptoms and Measures ............57 3. Service Check Function ................58 4. Troubleshooting ..................61 4.1 Error Codes and Description ..............61 4.2 Indoor Unit PCB Abnormality ..............62 4.3 Freeze-up Protection Control or Heating Peak-cut Control....63 4.4 Fan Motor (DC Motor) or Related Abnormality........64 4.5 Thermistor or Related Abnormality (Indoor Unit)........66...

  • Page 66: Caution For Diagnosis

    Caution for Diagnosis SiBE041029 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 67: Problem Symptoms And Measures

    SiBE041029 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 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 68: Service Check Function

    Service Check Function SiBE041029 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 > (R11506) 2.
  • Page 69 SiBE041029 Service Check Function 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 70 Service Check Function SiBE041029 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 71: Troubleshooting

    SiBE041029 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 72: Indoor Unit Pcb Abnormality

    Troubleshooting SiBE041029 Indoor Unit PCB Abnormality Remote Controller Display Method of Evaluation of zero-cross detection of power supply by the indoor unit PCB. Malfunction Detection Malfunction There is no zero-cross detection in approximately 10 seconds. Decision Conditions Supposed Wrong models interconnected Causes Defective indoor unit PCB Disconnection of connector...

  • Page 73: Freeze-Up Protection Control Or Heating Peak-Cut Control

    SiBE041029 Troubleshooting 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 74: Fan Motor (Dc Motor) Or Related Abnormality

    Troubleshooting SiBE041029 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 75 SiBE041029 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Turn off the power supply Refer to P.96 and rotate the fan by hand. Does the fan Replace the fan rotate smoothly? motor.

  • Page 76: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting SiBE041029 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 77: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    SiBE041029 Troubleshooting Signal Transmission Error (between Indoor Unit and Outdoor Unit) Remote Controller Display Method of The data received from the outdoor unit 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 78 Troubleshooting SiBE041029 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.10 Check the indoor unit - outdoor Refer to P.100 unit connection wires. Is there any wiring error? Correct the indoor unit - outdoor unit connection wires.

  • Page 79: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    SiBE041029 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 80: Outdoor Unit Pcb Abnormality

    Troubleshooting SiBE041029 Outdoor Unit PCB Abnormality Remote Controller Display Method of Detection within the program of the microcomputer Malfunction Detection Malfunction The program of the microcomputer is in abnormal running order. Decision Conditions Supposed Defective outdoor unit PCB Noise Causes Momentary fall of voltage Momentary power failure Troubleshooting...

  • Page 81: Ol Activation (Compressor Overload)

    SiBE041029 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 twice, the system is shut down. Reset condition: Continuous run for about 60 minutes without any other error Decision ∗...

  • Page 82: Compressor Lock

    Troubleshooting SiBE041029 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 Judging from the current waveform generated when high-frequency voltage is applied to the compressor.

  • Page 83: Dc Fan Lock

    SiBE041029 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 30 seconds even when the fan motor is running. If the error repeats 16 times, the system is shut down.

  • Page 84: Input Overcurrent Detection

    Troubleshooting SiBE041029 4.12 Input Overcurrent Detection Remote Controller Display Method of An input overcurrent is detected by checking the input current value being detected by CT with Malfunction the compressor running. Detection Malfunction The following CT input with the compressor running continues for 2.5 seconds. CT input : Above 20 A Decision Conditions...

  • Page 85: Four Way Valve Abnormality

    SiBE041029 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 1 minute after operating for 10 minutes.
  • Page 86 Troubleshooting SiBE041029 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.97 Four way valve coil Correct it. disconnected (loose)? Check No.06 Refer to P.98 Harness out of connector? Reconnect it.

  • Page 87: Discharge Pipe Temperature Control

    SiBE041029 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 °C, the compressor stops.

  • Page 88: High Pressure Control In Cooling

    Troubleshooting SiBE041029 4.15 High Pressure Control in Cooling Remote Controller Display Method of High-pressure control (operation half, frequency drop, etc.) is activated in cooling mode if the Malfunction 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 89: Compressor System Sensor Abnormality

    SiBE041029 Troubleshooting 4.16 Compressor System Sensor Abnormality Remote Controller Display Method of The system checks the supply voltage and the DC voltage before the compressor starts. The system checks the compressor current right after the compressor starts. Malfunction Detection Malfunction The supply voltage and the DC voltage is obviously low or high.

  • Page 90: Position Sensor Abnormality

    Troubleshooting SiBE041029 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 If the error repeats 8 times, the system is shut down. Reset condition: Continuous run for about 5 minutes without any other error Decision Conditions...
  • Page 91 SiBE041029 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power. Check the power supply voltage. Voltage as rated? Correct the power supply. Check the connection. Electrical components or compressor harnesses...

  • Page 92: Ct Or Related Abnormality

    Troubleshooting SiBE041029 4.18 CT or Related Abnormality Remote Controller Display Method of A CT or related error is detected by checking the compressor running frequency and CT- Malfunction detected input current. Detection Malfunction The compressor running frequency is more than Hz, and the CT input current is below Decision Conditions...
  • Page 93 SiBE041029 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.12 Turn off the power and turn it on Refer to P.101 again. Start operation. ∗ Running current as shown at Replace the outdoor unit right with relay cable 1...

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

    Troubleshooting SiBE041029 4.19 Thermistor or Related Abnormality (Outdoor Unit) H9 , J3 , J6 , P4 Remote Controller Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. Malfunction A thermistor error is detected by checking the temperature 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 95 SiBE041029 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.98 Turn on the power again. Error displayed Reconnect the connectors again on remote...

  • Page 96: Electrical Box Temperature Rise

    Troubleshooting SiBE041029 4.20 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 97 SiBE041029 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.99 again. To cool the electrical components, the outdoor fan starts when the radiation fin temperature rises above...

  • Page 98: Radiation Fin Temperature Rise

    Troubleshooting SiBE041029 4.21 Radiation Fin Temperature Rise Remote Controller Display Method of A radiation fin temperature rise is detected by checking the radiation fin temperature with the Malfunction compressor on. Detection Malfunction The radiation fin temperature with the compressor on is above °C.
  • Page 99 SiBE041029 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power and turn it on Check No.07 again to start the system. Refer to P.99 Check No.09 Refer to P.100 Error displayed again?

  • Page 100: Output Overcurrent Detection

    Troubleshooting SiBE041029 4.22 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 101 SiBE041029 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. ∗ An output overcurrent signal may result from wrong internal wiring. If the wires have been disconnected and reconnected and the system is interrupted by an output overcurrent, take the Check No.07 following procedure.

  • Page 102: Refrigerant Shortage

    Troubleshooting SiBE041029 4.23 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 output 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 103 SiBE041029 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.04 Refer to P.96 Any thermistor Replace them in position. disconnected? * Discharge pipe thermistor * Indoor or outdoor heat exchanger thermistor * Room temperature thermistor Check No.06 * Outdoor temperature thermistor...

  • Page 104: Low-Voltage Detection Or Over-Voltage Detection

    Troubleshooting SiBE041029 4.24 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 105: Signal Transmission Error On Outdoor Unit Pcb

    SiBE041029 Troubleshooting 4.25 Signal Transmission Error on Outdoor Unit PCB Remote Controller Display Method of Communication error between microcomputer mounted on the main microcomputer and PM1. Malfunction Detection Malfunction The abnormality is determined when the data sent from the PM1 can not be received for 9 Decision seconds.

  • Page 106: Check

    Check SiBE041029 5. Check How to Check 5.1.1 Fan Motor Connector Output Check Check No.01 1. Check the connection of connector. 2. Check motor power supply voltage output (pins 4 - 7). 3. Check motor control voltage (pins 4 - 3). 4.

  • Page 107: Four Way Valve Performance Check

    SiBE041029 Check 5.1.3 Four Way Valve Performance Check Check No.05 Turn off the power and turn it on again. ∗ Four way valve coil Start heating operation. Cooling / Dry : No continuity Heating : Continuity voltage at 220 - 240 Replace the outdoor unit VAC with compressor PCB.

  • Page 108: Thermistor Resistance Check

    Check SiBE041029 5.1.4 Thermistor Resistance Check Check No.06 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the graph and the table below.

  • Page 109: Installation Condition Check

    SiBE041029 Check 5.1.5 Installation Condition Check Check No.07 Installation condition check Check the allowable Abnormal dimensions of the air Change the installation suction and location or direction. discharge area. Normal Is the discharged Change the installation air short-circuited? location or direction. Is the outdoor heat Clean the outdoor heat exchanger very dirty?

  • Page 110: Outdoor Fan System Check

    Check SiBE041029 5.1.7 Outdoor Fan System Check Check No.09 DC motor Check the outdoor fan system. Fan motor lead wire connector Outdoor fan running? Reconnect the connector. disconnected? Outdoor fan system is functioning. Go to Check No. 15. (R7159) 5.1.8 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.

  • Page 111: Capacitor Voltage Check

    SiBE041029 Check 5.1.10 Capacitor Voltage Check Check No.12 Before this check, be sure to check the main circuit for short circuit. With the circuit breaker still on, measure the voltage according to the drawing of the model in question. Be careful never to touch any live parts. Multimeter (DC voltage range) Reactor lead wire...
  • Page 112 Check SiBE041029 5.1.12 Rotation Pulse Input on the Outdoor Unit PCB Check Check No.15 <Outdoor fan motor> Make sure that the voltage of 320 ± 30 V is applied. 1. Set operation off and power off. Disconnect the connector S70. 2.

  • Page 113: Part 7 Removal Procedure

    SiBE041029 Part 7 Removal Procedure 1. Indoor Unit...................104 1.1 Removal of Air Filter / Front Panel ............104 1.2 Removal of Front Grille ................107 1.3 Removal of Horizontal Blades / Vertical Blades ........109 1.4 Removal of Electrical Box / PCB / Swing Motor ........111 1.5 Removal of Indoor Heat Exchanger .............117 1.6 Removal of Fan Rotor / Fan Motor............120 2.

  • Page 114: Indoor Unit

    Indoor Unit SiBE041029 1. Indoor Unit Removal of Air Filter / Front Panel Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Room temperature sensor (thermistor) (R6699) When the signal receiver Operation lamp...
  • Page 115 SiBE041029 Indoor Unit Step Procedure Points 2. Remove the Titanium apatite photocatalytic air- purifying filter. Push up the bottom of a The right and left filters are Titanium apatite interchangeable. photocatalytic air- Hooks purifying filter to unfasten the hooks (2 on lower, 3 on upper) and take the filter out.
  • Page 116 Indoor Unit SiBE041029 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 side to side to release each shaft. Align the right and left shafts with grooves in turn and insert them to the end when...

  • Page 117: Removal Of Front Grille

    SiBE041029 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 cover. Remove the screw and remove the service cover.
  • Page 118 Indoor Unit SiBE041029 Step Procedure Points Unfasten the 3 hooks Refer to the removal on the top of the front procedure in a reverse way Hook grille. when reassembling. (R2759) Hook (R2760) Pull the upper part of Make sure that all the 3 the front grille out and hooks are placed securely lift the lower part up,...

  • Page 119: Removal Of Horizontal Blades / Vertical Blades

    SiBE041029 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 120 Indoor Unit SiBE041029 Step Procedure Points 2. Remove the vertical Remove the fan guards blades. beforehand. Release the right and left shafts. Vertical blades (R6705) Unfasten the 3 hooks. Hooks (R2768) Pull the vertical blades rightwards and remove them. (R6706) Removal Procedure...

  • Page 121: Removal Of Electrical Box / Pcb / Swing Motor

    SiBE041029 Indoor Unit Removal of Electrical Box / PCB / Swing Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Features Preparation Remove the front grille according to the “Removal of Front Grille”.
  • Page 122 Indoor Unit SiBE041029 Step Procedure Points 3. Remove the electrical box. 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 connector for fan motor for fan motor [S1].
  • Page 123 SiBE041029 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 124 Indoor Unit SiBE041029 Step Procedure Points Press the signal Release the hooks on the receiver unit down and upper side. unfasten the hooks on the upper side, and then unfasten the hooks on the lower side. Signal receiver unit (R2781) Cut the clamp.
  • Page 125 SiBE041029 Indoor Unit Step Procedure Points 4. Remove the control PCB. Unfasten the 2 hooks on the lower side, and Upper hooks then the 2 hooks on the upper side. Remove the control PCB. Control PCB Lower hooks (R2785) Control PCB See page for detail.
  • Page 126 Indoor Unit SiBE041029 Step Procedure Points 6. Remove the swing motor for vertical blades. Release the swing shaft Releasing the swing shaft on the right side. Remove the 2 screws and detach the swing motor assembly. (R2791) Swing motor assembly Remove the 2 screws The assembly has 6 hooks.

  • Page 127: Removal Of Indoor Heat Exchanger

    SiBE041029 Indoor Unit 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 / PCB / Swing...
  • Page 128 Indoor Unit SiBE041029 Step Procedure Points 2. Remove the indoor unit. Detach the indoor unit from the installation plate. 3. Remove the piping fixture. Unfasten the hook on the upper side of the piping fixture on the back of the unit. Piping fixture (R2798) 4.
  • Page 129 SiBE041029 Indoor Unit Step Procedure Points Unfasten the hooks on the left side. Hooks (R2800) Push the hooks on the right side and unfasten. Hooks (R2801) Pull the indoor heat Caution exchanger to the front Indoor heat exchanger When removing or side and unfasten the reinstalling the indoor heat hooks completely, and...

  • Page 130: Removal Of Fan Rotor / Fan Motor

    Indoor Unit SiBE041029 Removal of Fan Rotor / Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the right side plate. Remove the 2 screws. You can remove the fan rotor without detaching the right side plate.
  • Page 131 SiBE041029 Indoor Unit Step Procedure Points 3. Remove the fan motor. When reassembling the fan motor and the fan rotor, Remove the fan motor. provide as much as 5 mm of play between the side face of the rotor and the bottom frame.

  • Page 132: Outdoor Unit - Rx50/60G2V1B

    Outdoor Unit - RX50/60G2V1B SiBE041029 2. Outdoor Unit - RX50/60G2V1B 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 1. Remove the panels and plates.
  • Page 133 SiBE041029 Outdoor Unit - RX50/60G2V1B Step Procedure Points The discharge grille has 4 hooks. Slide the discharge grille upwards and remove it. Remove the 6 screws of the front panel. Front panel (R5247) Push the front panel and unfasten the hooks. Shield plate Lift the shield plate and remove it.
  • Page 134 Outdoor Unit - RX50/60G2V1B SiBE041029 Step Procedure Points Unfasten the left side Lift the front panel while hooks, and then the pushing the left side panel right side hook. inwards. Remove the front panel. Lift the front panel and unfasten the right side hook. Fit the right side of the front panel first when installing.
  • Page 135 SiBE041029 Outdoor Unit - RX50/60G2V1B Step Procedure Points 2. Remove the stop valve cover. Remove the screw of the stop valve cover. Stop valve cover (R5252) Pull down the stop valve cover to unfasten the hooks and remove The stop valve cover has 6 hooks.

  • Page 136: Removal Of Fan Motor / Outdoor Fan

    Outdoor Unit - RX50/60G2V1B SiBE041029 Removal of Fan Motor / Outdoor Fan 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 box Remove the top panel and cover.
  • Page 137 SiBE041029 Outdoor Unit - RX50/60G2V1B Step Procedure Points (R5258) 2. Remove the fan motor. Disconnect the connector for fan motor [S70] [S70]. (R5259) Release the fan motor lead wire from the 7 hooks. Fan motor lead wire (R5260) Removal Procedure...
  • Page 138 Outdoor Unit - RX50/60G2V1B SiBE041029 Step Procedure Points Unscrew the washer- Wrench size : 10 mm fitted nut (M6) of the outdoor fan with a wrench. Outdoor fan (R5262) Align mark of the outdoor fan with D-cut section of the motor shaft when reassembling.
  • Page 139 SiBE041029 Outdoor Unit - RX50/60G2V1B Step Procedure Points Release the fan motor Put the lead wire through the lead wire from the 2 back of the fan motor when hooks and pull the fan reassembling (so as not to motor out. be entangled with the outdoor fan).

  • Page 140: Removal Of Electrical Box

    Outdoor Unit - RX50/60G2V1B SiBE041029 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 1. Remove the shield plate. Remove the top panel and the front panel according to Remove the 2 screws.
  • Page 141 SiBE041029 Outdoor Unit - RX50/60G2V1B Step Procedure Points Disconnect the 2 earth wires. Earth wires (R5269) Remove the 3 screws of the right side panel. Right side panel (R5270) Remove the screw of the electrical box. Removal Procedure...
  • Page 142 Outdoor Unit - RX50/60G2V1B SiBE041029 Step Procedure Points Unfasten the hooks and Insert the 2 hooks of the remove the right side lower part and the 1 hook of panel. the upper back when Hook reassembling the right side panel. (R5272) Hooks (R5273)
  • Page 143 SiBE041029 Outdoor Unit - RX50/60G2V1B Step Procedure Points Release the clamp of the compressor relay harness with pliers. Compressor relay harness (R5277) Detach the clamp and release the thermistor Clamp Hook lead wires from the hook. Thermistor lead wire (R5278) Lift the electrical box and remove it.

  • Page 144: Removal Of Pcb

    Outdoor Unit - RX50/60G2V1B SiBE041029 Removal of PCB Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the PCB. Remove the electrical box according to the “Removal of Disconnect the Electrical Box”.
  • Page 145 SiBE041029 Outdoor Unit - RX50/60G2V1B Step Procedure Points Unfasten the hook on the right. Open the terminal board. Disconnect the 1: Black harnesses. 2: White 3: Red L1: Black L2: Brown N1: White N2: Blue (R5285) Disconnect the 2 harnesses for the reactor [HR1] [HR2].
  • Page 146 Outdoor Unit - RX50/60G2V1B SiBE041029 Step Procedure Points Remove the 3 screws of the main PCB. Unfasten the 4 hooks. Lift up and remove the See page 10 for detail of the main PCB. main PCB. Removal Procedure...

  • Page 147: Removal Of Sound Blanket / Thermistors

    SiBE041029 Outdoor Unit - RX50/60G2V1B Removal of Sound Blanket / Thermistors 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 sound blanket (back). Sound blanket (back) Remove the sound Since the piping ports on the...
  • Page 148 Outdoor Unit - RX50/60G2V1B SiBE041029 Step Procedure Points Remove the sound blanket (top lower). Remove the sound Since the piping ports on the blanket (inner). sound blanket are torn easily, remove the blanket carefully. Release the discharge pipe thermistor. fixture (R0266) Cut the clamp.

  • Page 149: Removal Of Four Way Valve

    SiBE041029 Outdoor Unit - RX50/60G2V1B 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 Remove the screw of Provide a protective sheet or the four way valve coil.

  • Page 150: Removal Of Electronic Expansion Valve

    Outdoor Unit - RX50/60G2V1B SiBE041029 Removal of Electronic Expansion 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 electronic expansion valve coil. Remove the sheets of putty.

  • Page 151: Removal Of Compressor

    SiBE041029 Outdoor Unit - RX50/60G2V1B 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 cover. Disconnect the lead wires of the compressor.
  • Page 152 Outdoor Unit - RX50/60G2V1B SiBE041029 Step Procedure Points Release the clamp with pliers to detach the compressor lead wires. Remove the putty. Before working, make sure that the refrigerant is empty in the circuit. Be sure to apply nitrogen replacement when heating up the brazed part.
  • Page 153 SiBE041029 Outdoor Unit - RX50/60G2V1B Step Procedure Points Remove the 2 nuts of the compressor. (R10257) Heat up the brazed part of the discharge side and disconnect. Before working, make sure that the refrigerant is empty in the circuit. Be sure to apply nitrogen replacement when heating up the...

  • Page 154: Outdoor Unit - Rx71Gv1B

    Outdoor Unit - RX71GV1B SiBE041029 3. Outdoor Unit - RX71GV1B 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 1. External appearance (R6368) 2.
  • Page 155 SiBE041029 Outdoor Unit - RX71GV1B Step Procedure Points Slide the suction grille downward to unfasten Hooks the 3 top hooks. (R6371) Remove the suction grille. (R6372) 3. Remove the top panel. Remove the 4 screws Top panel on the back and the 1 screw on the left side.
  • Page 156 Outdoor Unit - RX71GV1B SiBE041029 Step Procedure Points Remove the 2 screws on the front and the 1 screw on the right side panel. Right side panel (R6374) Lift the top panel and remove it. (R6375) 4. Remove the right side panel.
  • Page 157 SiBE041029 Outdoor Unit - RX71GV1B Step Procedure Points Slide the right side panel downward to unfasten the 2 hooks on the back side. (R11143) Hooks (R6378) Hooks (R11144) Removal Procedure...
  • Page 158 Outdoor Unit - RX71GV1B SiBE041029 Step Procedure Points Remove the right side panel. (R11145) 5. Remove the front panel (2). Remove the 2 screws. Front Panel (2) Front Panel (1) ★ This screw is M5(3) × 16 (R6984) Removal Procedure...
  • Page 159 SiBE041029 Outdoor Unit - RX71GV1B Step Procedure Points Slide the front panel (2) downward to unfasten the hook. (R6985) Remove the front panel (2). Hook (R6383) Removal Procedure...
  • Page 160 Outdoor Unit - RX71GV1B SiBE041029 Step Procedure Points 6. Remove the front panel Preparation (1). Remove the discharge grille and the outdoor fan first to Remove the 4 screws Front remove the front panel (1). on the discharge grille. Panel (1) Discharge grille (R6987) Pull the bottom of the...
  • Page 161 SiBE041029 Outdoor Unit - RX71GV1B Step Procedure Points Slide the discharge grille downward to unfasten the 2 hooks at the top. (R6989) Hooks (R6388) Remove the discharge grille. (R6990) Remove the outdoor Wrench size : 13 mm fan fixing nut (M8). Outdoor fan (R6991) Removal Procedure...
  • Page 162 Outdoor Unit - RX71GV1B SiBE041029 Step Procedure Points Remove the 2 screws on the partition plate (1). (R6992) Remove the screw at the bottom left of the Partition plate (1) front. (R6993) Remove the screw at the bottom of the left side.
  • Page 163 SiBE041029 Outdoor Unit - RX71GV1B Step Procedure Points Remove the screw at the bottom of the back side. (R6394) The front panel (1) has a hook on its front. Lift the front panel (1). Hook (R6994) Removal Procedure...
  • Page 164 Outdoor Unit - RX71GV1B SiBE041029 Step Procedure Points Remove the front panel (1). (R11400) Be sure to detach the front panel (1) carefully so as not to deform. (R6995) 7. Remove the rear panel. Remove the screw on the partition plate (2). Rear panel Partition plate (2)
  • Page 165 SiBE041029 Outdoor Unit - RX71GV1B Step Procedure Points Slide the partition plate (2) to the left, and remove it. Hook (R11148) Remove the 3 screws on the wire fixing plate. (R11149) Remove the wire fixing plate and the insulation. Wire fixing plate Insulation (R11150) Removal Procedure...
  • Page 166 Outdoor Unit - RX71GV1B SiBE041029 Step Procedure Points Release the holder of The holder is secured in the the thermistor. clearances of the outdoor Holder heat exchanger fins. (R11151) Release the thermistor wire from the groove. Thermistor Groove (R11152) Remove the 3 screws on the rear panel.
  • Page 167 SiBE041029 Outdoor Unit - RX71GV1B Step Procedure Points Remove the screw on the bottom frame. (R11154) Remove the screw on the stop valve mounting Stop valve mounting plate plate. (R11155) Lift the rear panel upward to unfasten the 2 hooks. Hooks Hooks (R11156)
  • Page 168 Outdoor Unit - RX71GV1B SiBE041029 Step Procedure Points Remove the rear panel. (R11157) Removal Procedure...

  • Page 169: Removal Of Electrical Box

    SiBE041029 Outdoor Unit - RX71GV1B 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 screw on the stop valve mounting Electrical box plate.
  • Page 170 Outdoor Unit - RX71GV1B SiBE041029 Step Procedure Points Disconnect the connector for fan motor [S70]. ★ Release the fan motor : When reassembling, do not lead wire from the 5 use these 2 hooks. hooks. (R9468) Disconnect the connectors of the front side.
  • Page 171 SiBE041029 Outdoor Unit - RX71GV1B Step Procedure Points The compressor lead wire is fixed on the partition plate (1) with a clamp. Clamp (R6422) Use pliers to pull out the clamp and release the compressor lead wire. Clamp (R6423) Disconnect the relay connector of the compressor.
  • Page 172 Outdoor Unit - RX71GV1B SiBE041029 Step Procedure Points 10 Slide the electrical box leftward to unfasten the hook on the right side of the box. Hook (R7009) 11 Lift up the electrical box and remove it. (R7010) Removal Procedure...

  • Page 173: Removal Of Pcb

    SiBE041029 Outdoor Unit - RX71GV1B Removal of PCB Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the PCB. Preparation Remove the electrical box Disconnect the [S102] according to the "Removal of...
  • Page 174 Outdoor Unit - RX71GV1B SiBE041029 Step Procedure Points Unfasten the hook on the right. Open the terminal board. Disconnect the 1: Black harnesses. 2: White 3: Red L1: Black L2: Brown N1: White N2: Blue (R5285) Disconnect the 2 [HR1] : white harnesses for the [HR2] : blue reactor [HR1] [HR2].
  • Page 175 SiBE041029 Outdoor Unit - RX71GV1B Step Procedure Points Remove the 3 screws of the main PCB. Unfasten the 4 hooks. Lift up and remove the See page 10 for detail of the main PCB. main PCB. Removal Procedure...

  • Page 176: Removal Of Fan Motor

    Outdoor Unit - RX71GV1B SiBE041029 Removal of 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 2 lower Be sure to remove the lower screws.

  • Page 177: Removal Of Coils / Thermistors

    SiBE041029 Outdoor Unit - RX71GV1B Removal of Coils / Thermistors 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 electronic expansion valve coil. Electronic Pull the electronic expansion...
  • Page 178 Outdoor Unit - RX71GV1B SiBE041029 Step Procedure Points 3. Remove the thermistors. Pull out the outdoor Outdoor heat exchanger thermistor heat exchanger thermistor. (R11160) Slightly open the sound blanket (outer). Sound blanket (outer) (R7011) Remove the sound blanket (top upper). Sound blanket (top upper) (R7012) Removal Procedure...
  • Page 179 SiBE041029 Outdoor Unit - RX71GV1B Step Procedure Points Remove the discharge pipe thermistor. Discharge pipe thermistor (R9469) Removal Procedure...

  • Page 180: Removal Of Sound Blanket

    Outdoor Unit - RX71GV1B SiBE041029 Removal of Sound Blanket Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Open the sound blanket (outer). Velcro tapes Sound blanket (outer) (R7013) Remove the sound The sound blanket is fragile.
  • Page 181 SiBE041029 Outdoor Unit - RX71GV1B Step Procedure Points Remove the sound blanket (outer). (R7016) Remove the sound The sound blanket is fragile. blanket (top lower). Carefully pass the discharge pipe through it. Sound blanket (top lower) (R7017) Open the sound blanket (inner).
  • Page 182 Outdoor Unit - RX71GV1B SiBE041029 Step Procedure Points Remove the sound blanket (inner). Sound blanket (inner) (R7019) Removal Procedure...

  • Page 183: Removal Of Compressor

    SiBE041029 Outdoor Unit - RX71GV1B 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 cover. Terminal cover (R9690) Pull out the 3 leads U: red, V: yellow, W: blue wires.
  • Page 184 SiBE041029 Part 8 Others 1. Others ....................175 1.1 Trial Operation..................175 1.2 Field Settings..................176 1.3 Application of Silicon Grease to a Power Transistor and a Diode Bridge..................177 Others...

  • Page 185: Part 8 Others

    SiBE041029 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 186: Field Settings

    Others SiBE041029 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 187: Application Of Silicon Grease To A Power Transistor And A Diode Bridge

    SiBE041029 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 188: Part 9 Appendix

    SiBE041029 Part 9 Appendix 1. Piping Diagrams..................179 1.1 Indoor Unit....................179 1.2 Outdoor Unit ..................180 2. Wiring Diagrams..................181 2.1 Indoor Unit....................181 2.2 Outdoor Unit ..................181 Appendix...

  • Page 189: Piping Diagrams

    SiBE041029 Piping Diagrams 1. Piping Diagrams Indoor Unit FTX50/60GV1B FTX71GV1B INDOOR UNIT INDOOR UNIT ( 7.9CuT ) ( 7.9CuT ) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR ON HEAT EXCH. THERMISTOR ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING ( 6.4CuT ) CROSS FLOW FAN FIELD PIPING FAN MOTOR...

  • Page 190: Outdoor Unit

    Piping Diagrams SiBE041029 Outdoor Unit RX50/60G2V1B OUTDOOR UNIT 7.9CuT HEAT EXCHANGER OUTDOOR AIR TEMPERATURE THERMISTOR 7.9CuT 7.9CuT 7.9CuT 12.7CuT 7.9CuT CAPILLARY TUBE 1 7.9CuT 4.0CuT MUFFLER 7.9CuT WITH 7.9CuT 4.0CuT 7.9CuT REFRIGERANT FLOW FILTER CAPILLARY TUBE 2 6.4CuT 7.9CuT COOLING CAPILLARY TUBE 3 4.0CuT HEATING...

  • Page 191: Wiring Diagrams

    SiBE041029 Wiring Diagrams 2. Wiring Diagrams Indoor Unit FTX50/60/71GV1B FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A OUTDOOR ° 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 LED3...
  • Page 192 Wiring Diagrams SiBE041029 RX60G2V1B MRM20 3.15A POWER SUPPLY MRM10 6(P) + + + 7(N) X11A TO INDOOR UNIT 3.15A PCB1 SHEET METAL S101 indoor FIELD WIRING t° t° t° S102 PCB2 LED A (OUTDOOR)(DISCHARGE) (CONDENSER) outdoor Z1C ~ Z4C : FERRITE CORE X1M, X2M : TERMINAL STRIP MRM10, MRM20...
  • Page 193 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.

This manual is also suitable for:

Ftx50gv1bFtx60gv1bFtx71gv1bRx50g2v1bRx60g2v1bRx71gv1b

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