Daikin FTXG-J Service Manual
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Daikin FTXG-J Service Manual

Wall mounted type j-series
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Service
Manual
Inverter Pair
Wall Mounted Type J-Series
SiBE041012_B
[Applied Models]
Inverter Pair : Heat Pump

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Summary of Contents for Daikin FTXG-J

  • Page 1 SiBE041012_B Service Manual Inverter Pair Wall Mounted Type J-Series [Applied Models] Inverter Pair : Heat Pump...
  • Page 2 SiBE041012_B Inverter Pair Wall Mounted Type J-Series Heat Pump Indoor Unit FTXG25JV1BW FTXG25JV1BS FTXG25JV1BA FTXG35JV1BW FTXG35JV1BS FTXG35JV1BA FTXG50JV1BW FTXG50JV1BS FTXG50JV1BA Outdoor Unit RXG25J2V1B RXG25K2V1B RXG25K3V1B RXG35J2V1B RXG35K2V1B RXG35K3V1B RXG50K2V1B RXG50K3V1B The removal procedure for each model is separately bound. Refer to page 137 for the booklet number of applicable model.

  • Page 3: Table Of Contents

    SiBE041012_B 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 ..............5 1. Specifications ..................6 Part 3 Printed Circuit Board Connector Wiring Diagram ... 14 1.
  • Page 4 SiBE041012_B Part 5 Remote Controller ............58 1. FTXG25/35/50JV1BW(S)(A) ..............59 Part 6 Service Diagnosis............. 61 1. Troubleshooting with LED ..............63 1.1 Indoor Unit....................63 1.2 Outdoor Unit ...................63 2. Problem Symptoms and Measures ............64 3. Service Check Function ................65 4. Troubleshooting ..................68 4.1 Error Codes and Description ..............68 4.2 Indoor Unit PCB Abnormality ..............69 4.3 Freeze-up Protection Control or Heating Peak-cut Control....70...
  • Page 5 SiBE041012_B 5.12 Main Circuit Short Check..............118 5.13 Capacitor Voltage Check..............119 5.14 Power Module Check ................120 Part 7 Trial Operation and Field Settings......... 122 1. Pump Down Operation................123 2. Forced Cooling Operation ..............124 3. Trial Operation ..................126 4. Field Settings ..................127 4.1 When 2 Units are Installed in 1 Room..........127 4.2 Standby Electricity Saving..............128 4.3 Facility Setting Jumper (cooling at low outdoor temperature) ....129...

  • Page 6: Introduction

    Introduction SiBE041012_B 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 7 SiBE041012_B Introduction Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m). Insufficient safety measures may cause a fall accident. In case of R-410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R-410A refrigerant.
  • Page 8 Introduction SiBE041012_B 1.1.2 Cautions Regarding Safety of Users Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools may cause an electrical shock, excessive heat generation or fire.
  • Page 9 SiBE041012_B Introduction Warning Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely. If the plug has dust or loose connection, it may cause an electrical shock or fire. Be sure to install the product correctly by using the provided standard For unitary type installation frame.

  • Page 10: Used Icons

    Introduction SiBE041012_B Caution Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 MΩ or higher. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause the water to enter the room and wet the furniture and floor.

  • Page 11: Part 1 List Of Functions

    SiBE041012_B Part 1 List of Functions 1. Functions....................2 List of Functions...

  • Page 12: Functions

    Functions SiBE041012_B 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 — ~ 46 –15 Air-purifying filter with photocatalytic Operation limit for heating (°CWB) —...
  • Page 13 SiBE041012_B 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 — — ~ 46 ~ 46 –15 –15 Air-purifying filter with photocatalytic Operation limit for heating (°CWB) —...
  • Page 14 Functions SiBE041012_B Category Functions Category Functions Basic Function Inverter (with inverter power control) Health & Clean Air-purifying filter — — Operation limit for cooling (°CDB) ~ 46 ~ 46 Photocatalytic deodorizing filter — — –15 –15 Air-purifying filter with photocatalytic Operation limit for heating (°CWB) —...

  • Page 15: Part 2 Specifications

    SiBE041012_B Part 2 Specifications 1. Specifications ..................6 Specifications...

  • Page 16: Specifications

    Specifications SiBE041012_B 1. Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG25JV1BW FTXG25JV1BS Models RXG25J2V1B RXG25J2V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.3 ~ 3.0) 3.4 (1.3 ~ 4.5) 2.5 (1.3 ~ 3.0) 3.4 (1.3 ~ 4.5) Capacity Btu/h 8,500 (4,400 ~ 10,200)
  • Page 17 SiBE041012_B Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG35JV1BW FTXG35JV1BS Models RXG35J2V1B RXG35J2V1B Outdoor Unit Cooling Heating Cooling Heating 3.5 (1.4 ~ 3.8) 4.0 (1.4 ~ 5.0) 3.5 (1.4 ~ 3.8) 4.0 (1.4 ~ 5.0) Capacity Btu/h 11,900 (4,800 ~ 13,000) 13,600 (4800 ~ 17,100)
  • Page 18 Specifications SiBE041012_B 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG25JV1BW FTXG25JV1BS, FTXG25JV1BA Models RXG25K2V1B RXG25K2V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.3 ~ 3.0) 3.4 (1.3 ~ 4.5) 2.5 (1.3 ~ 3.0) 3.4 (1.3 ~ 4.5) Capacity Btu/h 8,500 (4,400 ~ 10,200)
  • Page 19 SiBE041012_B Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG35JV1BW FTXG35JV1BS, FTXG35JV1BA Models RXG35K2V1B RXG35K2V1B Outdoor Unit Cooling Heating Cooling Heating 3.5 (1.4 ~ 3.8) 4.0 (1.4 ~ 5.0) 3.5 (1.4 ~ 3.8) 4.0 (1.4 ~ 5.0) Capacity Btu/h 11,900 (4,800 ~ 13,000)
  • Page 20 Specifications SiBE041012_B 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG50JV1BW FTXG50JV1BS, FTXG50JV1BA Models RXG50K2V1B RXG50K2V1B Outdoor Unit Cooling Heating Cooling Heating 5.0 (1.7 ~ 5.3) 5.8 (1.7 ~ 6.5) 5.0 (1.7 ~ 5.3) 5.8 (1.7 ~ 6.5) Capacity Btu/h 17,100 (5,800 ~ 18,100)
  • Page 21 SiBE041012_B Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG25JV1BW FTXG25JV1BA Models RXG25K3V1B RXG25K3V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.3 ~ 3.0) 3.4 (1.3 ~ 4.5) 2.5 (1.3 ~ 3.0) 3.4 (1.3 ~ 4.5) Capacity Btu/h 8,500 (4,400 ~ 10,200) 11,600 (4,400 ~ 15,400)
  • Page 22 Specifications SiBE041012_B 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG35JV1BW FTXG35JV1BA Models RXG35K3V1B RXG35K3V1B Outdoor Unit Cooling Heating Cooling Heating 3.5 (1.4 ~ 3.8) 4.0 (1.4 ~ 5.0) 3.5 (1.4 ~ 3.8) 4.0 (1.4 ~ 5.0) Capacity Btu/h 11,900 (4,800 ~ 13,000) 13,600 (4800 ~ 17,100)
  • Page 23 SiBE041012_B Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG50JV1BW FTXG50JV1BA Models RXG50K3V1B RXG50K3V1B Outdoor Unit Cooling Heating Cooling Heating 5.0 (1.7 ~ 5.3) 5.8 (1.7 ~ 6.5) 5.0 (1.7 ~ 5.3) 5.8 (1.7 ~ 6.5) Capacity Btu/h 17,100 (5,800 ~ 18,100) 19,800 (5,800 ~ 22,200)

  • Page 24: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiBE041012_B Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit.....................15 2. Outdoor Unit..................17 2.1 25/35 Class ....................17 2.2 RXG50K2V1B ..................19 2.3 RXG50K3V1B ..................20 Printed Circuit Board Connector Wiring Diagram...

  • Page 25: Indoor Unit

    SiBE041012_B Indoor Unit 1. Indoor Unit Control PCB 1) S21 Connector for centralized control (HA) 2) S25 Connector for INTELLIGENT EYE sensor PCB 3) S32 Connector for indoor heat exchanger thermistor 4) S41 Connector for swing motors 5) S42 Connector for reduction motor (front panel mechanism) and limit switch 6) S46 Connector for signal receiver / display PCB 7) S200...
  • Page 26 Indoor Unit SiBE041012_B Signal Receiver / Display PCB 1) S51 Connector for control PCB 2) S52 Connector for room temperature thermistor 3) S1W Forced cooling operation [ON/OFF] button ∗ Refer to page 124 for detail. 4) H1P LED for operation (multi-color) 5) H2P LED for INTELLIGENT EYE (green) 6) JA...

  • Page 27: Outdoor Unit

    SiBE041012_B Outdoor Unit 2. Outdoor Unit 25/35 Class Main PCB 1) S10 Connector for filter PCB 2) S20 Connector for outdoor electronic expansion valve coil 3) S40 Connector for overload protector 4) S50 Connector for magnetic relay 5) S70 Connector for fan motor 6) S80 Connector for four way valve coil 7) S90...
  • Page 28 Outdoor Unit SiBE041012_B Filter PCB 1) S11 Connector for main PCB 2) AC1, AC2, S Connector for terminal board 3) E1, E2 Terminal for earth wire 4) HL2, HN2 Connector for main PCB 5) HR1 Connector for reactor 6) FU1 Fuse (3.15 A, 250 V) 7) FU3 Fuse (20 A, 250 V)

  • Page 29: Rxg50K2V1B

    SiBE041012_B Outdoor Unit RXG50K2V1B Main PCB 1) S10 Connector for terminal board (indoor - outdoor transmission) 2) S20 Connector for outdoor electronic expansion valve coil 3) S40 Connector for overload protector 4) S51, S101 Connector for service monitor PCB 5) S70 Connector for fan motor 6) S80 Connector for four way valve coil...

  • Page 30: Rxg50K3V1B

    Outdoor Unit SiBE041012_B RXG50K3V1B Main PCB 1) S10 Connector for [S11] on filter PCB 2) S12 Connector for [HL4] [HN4] on filter PCB 3) S20 Connector for outdoor electronic expansion valve coil 4) S40 Connector for overload protector 5) S50 Connector for magnetic relay 6) S70 Connector for fan motor...
  • Page 31 SiBE041012_B Outdoor Unit Filter PCB 1) S11 Connector for [S10] on main PCB 2) HL1, HN1, S Connector for terminal board 3) E1, E2 Terminal for earth wire 4) HL2, HN2 Connector for [HL3] [HN3] on main PCB 5) HL4, HN4 Connector for [S12] on main PCB 6) FU1 Fuse (3.15 A, 250 V)

  • Page 32: Part 4 Function And Control

    SiBE041012_B Part 4 Function and Control 1. Main Functions..................23 1.1 Temperature Control ................23 1.2 Frequency Principle................23 1.3 Operation Starting Control..............25 1.4 Airflow Direction Control.................26 1.5 Fan Speed Control for Indoor Unit ............27 1.6 Program Dry Operation ................28 1.7 Automatic Operation................29 1.8 Thermostat Control.................30 1.9 NIGHT SET Mode ..................31 1.10 ECONO Operation .................32...

  • Page 33: Main Functions

    SiBE041012_B 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 34 Main Functions SiBE041012_B 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 35: Operation Starting Control

    SiBE041012_B Main Functions Operation Starting Control Outline The system carries out the following control at the beginning to conduct every functional parts properly. 1. Opening the front panel fully 2. Output of the ∆D signal after the front panel starts moving 3.

  • Page 36: Airflow Direction Control

    Main Functions SiBE041012_B Airflow Direction Control Power-Airflow The large flap sends a large volume of air downward to the floor and provides an optimum control in cooling, dry, and heating operation. Dual Flaps <Cooling / Dry> During cooling or dry operation, the flap retracts into the indoor unit. Then, cool air can be blown far and distributed all over the room.

  • Page 37: Fan Speed Control For Indoor Unit

    SiBE041012_B Main Functions 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 38: Program Dry Operation

    Main Functions SiBE041012_B 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] setting buttons are inoperable. Detail The microcomputer automatically sets the temperature and airflow rate. The difference between the room thermistor temperature at start-up and the target temperature is divided into two zones.

  • Page 39: Automatic Operation

    SiBE041012_B Main Functions Automatic Operation Outline Automatic Cooling / Heating Function When the automatic operation 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. The unit automatically switches the operation mode to maintain the room temperature at the set temperature.

  • Page 40: Thermostat Control

    Main Functions SiBE041012_B Thermostat Control Outline Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Detail 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 41: Night Set Mode

    SiBE041012_B Main Functions NIGHT SET Mode Outline When the OFF TIMER is set, the NIGHT SET Mode is automatically activated. The NIGHT SET Mode keeps the airflow rate setting. Detail The NIGHT SET Mode continues operation at the target temperature for the first one hour, then automatically raises the target temperature slightly in the case of cooling, or lowers it slightly in the case of heating.

  • Page 42: Econo Operation

    Main Functions SiBE041012_B 1.10 ECONO Operation Outline ECONO operation reduces the maximum operating current and the power consumption. This operation is particularly convenient for energy-saving-oriented users. It is also a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners.

  • Page 43: Intelligent Eye Operation

    SiBE041012_B Main Functions 1.11 INTELLIGENT EYE Operation Outline This function detects the existence of humans in the room with a motion sensor (INTELLIGENT EYE) and reduces the capacity when there is nobody in the room in order to save electricity. Detail 1.

  • Page 44: Inverter Powerful Operation

    Main Functions SiBE041012_B 1.12 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 the [POWERFUL] button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes.
  • Page 45 SiBE041012_B Main Functions Brightness The brightness of the multi-colored indicator lamp can be adjusted L (low), H (high), or OFF. Setting 1. Press the center of the [Temp] button and the [Mode] button at the same time. (R11669) is displayed on the LCD. (R11911) 2.

  • Page 46: Clock Setting

    Main Functions SiBE041012_B 1.14 Clock Setting ARC466 Series The clock can be set by taking the following steps: 1. Press the [CLOCK] button. → is displayed and MON and blink. 2. Press the [SELECT] button to set the clock to the current day of the week. 3.

  • Page 47: Weekly Timer Operation

    SiBE041012_B Main Functions 1.15 WEEKLY TIMER Operation Outline Up to 4 timer settings can be saved for each day of the week (up to 28 settings in total). The 3 items: “ON/OFF”, “temperature”, and “time” can be set. Detail Using in these cases of WEEKLY TIMER Example: The same timer settings are made for the week from Monday through Friday while different timer settings are made for the weekend.
  • Page 48 Main Functions SiBE041012_B To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. Program 1 Program 2 Program 3 Program 4 27˚C [Monday] 25˚C...
  • Page 49 SiBE041012_B Main Functions Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10 minute intervals. • To return to the ON/OFF TIMER mode setting, press • Go to step when setting the OFF TIMER. Press •...

  • Page 50: Copy Mode

    Main Functions SiBE041012_B Copy mode • A reservation made once can be copied to another day of the week. The whole reservation of the selected day of the week will be copied. Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C 27˚C...
  • Page 51 SiBE041012_B Main Functions Confirming a reservation • The reservation can be confirmed. Setting Displays Normal Confirmation Press • The day of the week and the reservation number of the current day will be displayed. Press to select the day of the week and the reservation number to be confirmed.
  • Page 52 Main Functions SiBE041012_B To delete reservations The individual reservation Press • The day of the week and the reservation number will be displayed. Press to select the day of the week and the reservation number to be deleted. Press • “ ”...

  • Page 53: Other Functions

    SiBE041012_B Main Functions 1.16 Other Functions 1.16.1 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 the airflow is either stopped or made very weak thereby carrying out comfortable heating of the room.

  • Page 54: Function Of Thermistor

    Function of Thermistor SiBE041012_B 2. Function of Thermistor Outdoor electronic expansion valve Four way valve Compressor (R18337) (1) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling the 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 outdoor electronic Thermistor...

  • Page 55: Control Specification

    SiBE041012_B Control Specification 3. Control Specification Mode Hierarchy Outline Air conditioner control has normal operation mode, forced operation mode, and power transistor test mode for installation and servicing. Detail Air conditioner control mode Forced operation mode Forced cooling operation (for pump down operation) Power transistor test mode Normal operation mode Cooling (includes drying)

  • Page 56: Frequency Control

    Control Specification SiBE041012_B 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 57 SiBE041012_B Control Specification Indoor Frequency Command (∆D signal) The difference between the room thermistor 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 signal difference signal...

  • Page 58: Controls At Mode Changing / Start-Up

    Control Specification SiBE041012_B Controls at Mode Changing / Start-up 3.3.1 Preheating Control Outline The inverter operation in open phase starts with the conditions of the preheating command from the indoor unit, the outdoor temperature, and the discharge pipe temperature. Outdoor temperature ≥ A°C → Control I Detail Outdoor temperature <...

  • Page 59: Discharge Pipe Temperature Control

    SiBE041012_B Control Specification 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 60: Input Current Control

    Control Specification SiBE041012_B Input Current Control Outline The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit from the input current. In case of heat pump models, this control which is the upper limit control of the frequency takes priority over the lower limit of control of four way valve operation compensation.

  • Page 61: Freeze-Up Protection Control

    SiBE041012_B Control Specification Freeze-up Protection Control Outline During cooling operation, the signal sent from the indoor unit controls the operating frequency limitation and prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is divided into zones.) Detail The operating frequency limitation is judged with the indoor heat exchanger temperature.

  • Page 62: Outdoor Fan Control

    Control Specification SiBE041012_B 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 during defrosting The outdoor fan is turned OFF during defrosting.

  • Page 63: Defrost Control

    SiBE041012_B Control Specification 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 64: Outdoor Electronic Expansion Valve Control

    Control Specification SiBE041012_B 3.11 Outdoor Electronic Expansion Valve Control Outline The following items are included in the outdoor electronic expansion valve control. Outdoor electronic expansion valve is fully closed. 1. Outdoor electronic expansion valve is fully closed when turning on the power. 2.
  • Page 65 SiBE041012_B Control Specification 3.11.1 Fully Closing with Power ON The outdoor 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 outdoor electronic expansion valve opens, and develops the pressure equalization.
  • Page 66 Control Specification SiBE041012_B 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 condensation temperature. If the discharge pipe thermistor is disconnected, the outdoor electronic expansion valve opens according to the outdoor temperature and the operation frequency, operates for a specified time, and then stops.

  • Page 67: Malfunctions

    SiBE041012_B Control Specification 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 68: Part 5 Remote Controller

    SiBE041012_B Part 5 Remote Controller 1. FTXG25/35/50JV1BW(S)(A) ..............59 Remote Controller...

  • Page 69: Ftxg25/35/50Jv1Bw(S)(A)

    Refer to the following pages for detail. 1 POWERFUL operation P.34 Note: Refer to the operation manual of applicable model for detail. You can download operation manual from ‘DISTRIBUTOR’S PAGE’: DISTRIBUTOR’S PAGE → Product Information → Operation/Installation Manual (URL: http://global.daikin.com/Daikin/global/Distributors_admin/user_mng/login.php) Remote Controller...
  • Page 70 4 Auto swing setting P.26 7 Clock setting P.36 Note: Refer to the operation manual of applicable model for detail. You can download operation manual from ‘DISTRIBUTOR’S PAGE’: DISTRIBUTOR’S PAGE → Product Information → Operation/Installation Manual (URL: http://global.daikin.com/Daikin/global/Distributors_admin/user_mng/login.php) Remote Controller...

  • Page 71: Part 6 Service Diagnosis

    SiBE041012_B Part 6 Service Diagnosis 1. Troubleshooting with LED ..............63 1.1 Indoor Unit....................63 1.2 Outdoor Unit ...................63 2. Problem Symptoms and Measures ............64 3. Service Check Function ................65 4. Troubleshooting ..................68 4.1 Error Codes and Description ..............68 4.2 Indoor Unit PCB Abnormality ..............69 4.3 Freeze-up Protection Control or Heating Peak-cut Control....70 4.4 Fan Motor (DC Motor) or Related Abnormality........71 4.5 Thermistor or Related Abnormality (Indoor Unit)........73...
  • Page 72 SiBE041012_B 5.11 Outdoor Fan System Check ..............118 5.12 Main Circuit Short Check..............118 5.13 Capacitor Voltage Check..............119 5.14 Power Module Check ................120 Service Diagnosis...

  • Page 73: Troubleshooting With Led

    SiBE041012_B Troubleshooting with LED 1. Troubleshooting with LED Indoor Unit Operation Lamp The multi-colored indicator lamp blinks when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions.

  • Page 74: Problem Symptoms And Measures

    Problem Symptoms and Measures SiBE041012_B 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 75: Service Check Function

    SiBE041012_B Service Check Function 3. Service Check Function 1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature Check Method 1 display screen. Timer cancel button (R14553) < ARC466 Series > 2. Press the timer cancel button repeatedly until a long beep sounds. The code indication changes in the sequence shown below.
  • Page 76 Service Check Function SiBE041012_B Check Method 2 1. Press the center of the [Temp] button and the [Mode] button at the same time. (R11669) is displayed on the LCD. (R11821) 2. Select 5C (service check) with the [Temp] button. 3. Press the [Mode] button to enter the service check mode. (R11672) The left-side number blinks.
  • Page 77 SiBE041012_B Service Check Function 5. Diagnose by the sound. beep : The left-side number does not correspond with the error code. two consecutive beeps : The left-side number corresponds with the error code but the right-side number does not. long beep : Both the left-side and right-side numbers correspond with the error code. (The numbers indicated when you hear the long beep are the error code.

  • Page 78: Troubleshooting

    Troubleshooting SiBE041012_B 4. Troubleshooting Error Codes and Description Reference Error Codes Description Page System Normal — 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 79: Indoor Unit Pcb Abnormality

    SiBE041012_B Troubleshooting Indoor Unit PCB Abnormality Error Code Method of Error The system checks if the circuit works properly within the microcomputer of the indoor unit. Detection Error Decision The system cannot set the internal settings. Conditions Supposed Wrong models interconnected Defective indoor unit PCB Causes Disconnection of connector...

  • Page 80: Freeze-Up Protection Control Or Heating Peak-Cut Control

    Troubleshooting SiBE041012_B Freeze-up Protection Control or Heating Peak-cut Control Error Code Method of Error Freeze-up protection control During cooling operation, the freeze-up protection control (operation halt) is activated Detection according to the temperature detected by the indoor heat exchanger thermistor. Heating peak-cut control During heating operation, the temperature detected by the indoor heat exchanger thermistor is used for the heating peak-cut control (operation halt, outdoor fan stop, etc.)

  • Page 81: Fan Motor (Dc Motor) Or Related Abnormality

    SiBE041012_B Troubleshooting Fan Motor (DC Motor) or Related Abnormality Error Code Method of Error The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Detection Error Decision 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 82 Troubleshooting SiBE041012_B 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.111 and rotate the fan by hand. Does the fan Replace the indoor rotate smoothly? fan motor.

  • Page 83: Thermistor Or Related Abnormality (Indoor Unit)

    SiBE041012_B Troubleshooting Thermistor or Related Abnormality (Indoor Unit) C4 , C9 Error Code Method of Error The temperatures detected by the thermistors determine thermistor errors. Detection Error Decision The thermistor input is more than 4.96 V or less than 0.04 V during compressor operation. Conditions Supposed Disconnection of connector...

  • Page 84: Front Panel Open / Close Fault

    Troubleshooting SiBE041012_B Front Panel Open / Close Fault Error Code Method of Error Detection Error Decision If the error repeats, the system is shut down. Conditions Supposed Defective reduction motor Malfunction or deterioration of the front panel mechanism Causes Defective limit switch Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution...

  • Page 85: Refrigerant Shortage

    SiBE041012_B Troubleshooting Refrigerant Shortage Error Code Method of Error Refrigerant shortage detection I: Refrigerant shortage is detected by checking the input current value and the compressor Detection running frequency. If the refrigerant is short, the input current is lower than the normal value. Refrigerant shortage detection II: Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of the outdoor electronic expansion valve.
  • Page 86 Troubleshooting SiBE041012_B Refrigerant shortage detection III: (25/35 class only) When the difference of the temperature is smaller than K°C, it is regarded as refrigerant shortage. Operation Description K (°C) mode room thermistor temperature – indoor heat exchanger temperature Cooling outdoor heat exchanger temperature – outdoor temperature indoor heat exchanger temperature –...
  • Page 87 SiBE041012_B 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.110 Any thermistor Replace the thermistor(s) disconnected? ∗ Discharge pipe thermistor position. ∗ Indoor or outdoor heat exchanger thermistor ∗...

  • Page 88: Low-Voltage Detection Or Over-Voltage Detection

    Troubleshooting SiBE041012_B Low-voltage Detection or Over-voltage Detection Error Code Method of Error Indoor Unit Detection The zero-cross detection of the power supply is evaluated by the indoor unit PCB. Outdoor Unit Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit. Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit.
  • Page 89 SiBE041012_B Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply voltage. Voltage as rated? Correct the power supply. Check the connection of the compressor harness. Loose or Reconnect the harness.

  • Page 90: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    Troubleshooting SiBE041012_B Signal Transmission Error (between Indoor Unit and Outdoor Unit) Error Code Method of Error The data received from the outdoor unit in signal transmission is checked whether it is normal. Detection Error Decision The data sent from the outdoor unit cannot be received normally, or the content of the data is Conditions abnormal.
  • Page 91 SiBE041012_B Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.11 Refer to P.111 Check the power supply voltage. Voltage as rated? Correct the power supply. Check the indoor unit - outdoor unit connection wires.

  • Page 92: Signal Transmission Error On Outdoor Unit Pcb (Rxg50K2V1B Only)

    Troubleshooting SiBE041012_B 4.10 Signal Transmission Error on Outdoor Unit PCB (RXG50K2V1B Only) Error Code Method of Error Communication error between microcomputer mounted on the main microcomputer and PM1. Detection Error Decision The abnormality is determined when the data sent from the PM1 can not be received for 9 seconds.

  • Page 93: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    SiBE041012_B Troubleshooting 4.11 Unspecified Voltage (between Indoor Unit and Outdoor Unit) Error Code Method of Error The supply power is detected for its requirements (different from pair type and multi type) by the indoor / outdoor transmission signal. Detection Error Decision The pair type and multi type are interconnected.

  • Page 94: Outdoor Unit Pcb Abnormality

    Troubleshooting SiBE041012_B 4.12 Outdoor Unit PCB Abnormality Error Code Method of Error The system checks if the microprocessor is working in order. The system checks if the zero-cross signal comes in properly. Detection Error Decision The microprocessor program runs out of control. The zero-cross signal is not detected.
  • Page 95 SiBE041012_B Troubleshooting Troubleshooting RXG50K2V1B Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn on the power again. Error again? Replace the outdoor unit PCB. Check to see if the unit is grounded.

  • Page 96: Ol Activation (Compressor Overload)

    Troubleshooting SiBE041012_B 4.13 OL Activation (Compressor Overload) Error Code Method of Error A compressor overload is detected through compressor OL. Detection Error Decision If the error repeats, the system is shut down. Reset condition: Continuous run for about 60 minutes without any other error Conditions Supposed Disconnection of discharge pipe thermistor...
  • Page 97 SiBE041012_B 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.110 Discharge pipe thermistor Insert the thermistor in disconnected? position. Check No.12 Refer to P.112 Check No.

  • Page 98: Compressor Lock

    Troubleshooting SiBE041012_B 4.14 Compressor Lock Error Code Method of Error A compressor lock is detected by checking the compressor running condition through the position detection circuit. Detection Error Decision 25/35 class Operation stops due to overcurrent. Conditions If the error repeats, the system is shut down. Reset condition: Continuous run for about 11 minutes without any other error 50 class A compressor lock is detected by the current waveform generated when applying high-...

  • Page 99: Dc Fan Lock

    SiBE041012_B Troubleshooting 4.15 DC Fan Lock Error Code Method of Error An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Detection Error Decision The fan does not start in about 15 ~ 30 seconds even when the fan motor is running. If the error repeats, the system is shut down.

  • Page 100: Input Overcurrent Detection

    Troubleshooting SiBE041012_B 4.16 Input Overcurrent Detection Error Code Method of Error An input overcurrent is detected by checking the input current value with the compressor running. Detection Error Decision The current exceeds about 9.25 ~ 20 A (depending on the model) for 2.5 seconds with the compressor running.

  • Page 101: Four Way Valve Abnormality

    SiBE041012_B Troubleshooting 4.17 Four Way Valve Abnormality Error Code Method of Error The room temperature thermistor and the indoor heat exchanger thermistor are checked if they function within their normal ranges in each operation mode. Detection Error Decision A following condition continues over 1 ~ 10 minutes (depending on the model) after operating for 5 ~ 10 minutes (depending on the model).
  • Page 102 Troubleshooting SiBE041012_B 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 Refer to P.110 Correct the four way valve disconnected (loose)? coil. Check No.13 Refer to P.113 Harness out of connector? Reconnect the harness.

  • Page 103: Discharge Pipe Temperature Control

    SiBE041012_B Troubleshooting 4.18 Discharge Pipe Temperature Control Error Code Method of Error An error is determined with the temperature detected by the discharge pipe thermistor. Detection Error Decision If the temperature detected by the discharge pipe thermistor rises above A°C, the compressor stops.

  • Page 104: High Pressure Control In Cooling

    Troubleshooting SiBE041012_B 4.19 High Pressure Control in Cooling Error Code Method of Error High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection Error Decision The temperature sensed by the outdoor heat exchanger thermistor rises above about 60 ~ 65°C (depending on the model).

  • Page 105: Compressor System Sensor Abnormality

    SiBE041012_B Troubleshooting 4.20 Compressor System Sensor Abnormality 4.20.1 25/35 Class, RXG50K3V1B Error Code Method of Error The system checks the DC current before the compressor starts. Detection Error Decision The DC current before compressor start-up is out of the range 0.5 ~ 4.5 V (sensor output Conditions converted to voltage value) The DC voltage before compressor start-up is below 50 V.
  • Page 106 Troubleshooting SiBE041012_B 4.20.2 RXG50K2V1B Error Code Method of Error The system checks the power supply voltage and the DC voltage before the compressor starts. Detection The system checks the compressor current right after the compressor starts. Error Decision The power supply voltage and the DC voltage is obviously low or high. Conditions The compressor current does not run when the compressor starts.

  • Page 107: Position Sensor Abnormality

    SiBE041012_B Troubleshooting 4.21 Position Sensor Abnormality Error Code Method of Error A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit. Detection Error Decision If the error repeats, the system is shut down. Reset condition: Continuous run for about 11 minutes (25/35 class) or 5 minutes (50 class) Conditions without any other error...
  • Page 108 Troubleshooting SiBE041012_B Troubleshooting 25/35 class, RXG50K3V1B 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.114 Turn off the power. Check No.18 Check the power supply voltage. Refer to P.117 Voltage as rated? Correct the power supply.
  • Page 109 SiBE041012_B Troubleshooting Troubleshooting RXG50K2V1B 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.114 Turn off the power. Check No.18 Check the power supply voltage. Refer to P.117 Voltage as rated? Correct the power supply.

  • Page 110: Dc Voltage / Current Sensor Abnormality (25/35 Class Only)

    Troubleshooting SiBE041012_B 4.22 DC Voltage / Current Sensor Abnormality (25/35 Class Only) Error Code Method of Error DC voltage or DC current sensor abnormality is identified based on the compressor running frequency and the input current. Detection Error Decision If the error repeats, the system is shut down. Reset condition: Continuous run for about 60 minutes without any other error Conditions Supposed...

  • Page 111: Ct Or Related Abnormality (Rxg50K2V1B Only)

    SiBE041012_B Troubleshooting 4.23 CT or Related Abnormality (RXG50K2V1B Only) Error Code Method of Error A CT or related error is detected by checking the compressor running frequency and CT- detected input current. Detection Error Decision The compressor running frequency is more than A Hz, and the CT input current is less than B A.
  • Page 112 Troubleshooting SiBE041012_B Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Turn off the power and turn it on Refer to P.114 again. Check No.21 Start operation. Refer to P.119 ∗...

  • Page 113: Thermistor Or Related Abnormality (Outdoor Unit)

    SiBE041012_B Troubleshooting 4.24 Thermistor or Related Abnormality (Outdoor Unit) H9 , J3 , J6 , P4 Error Code Method of Error This fault is identified based on the thermistor input voltage to the microcomputer. A thermistor fault is identified based on the temperature sensed by each thermistor. Detection Error Decision The thermistor input voltage is above 4.96 V or below 0.04 V with the power on.
  • Page 114 Troubleshooting SiBE041012_B 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 Refer to P.110 Turn on the power again. Error displayed Reconnect the connectors again on remote...

  • Page 115: Electrical Box Temperature Rise

    SiBE041012_B Troubleshooting 4.25 Electrical Box Temperature Rise Error Code Method of Error An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off. Detection Error Decision 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 116: Radiation Fin Temperature Rise

    Troubleshooting SiBE041012_B 4.26 Radiation Fin Temperature Rise Error Code Method of Error A radiation fin temperature rise is detected by checking the radiation fin thermistor with the compressor on. Detection Error Decision 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 117 SiBE041012_B 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.117 again to start the system. Check No.19 Refer to P.118 Has the PCB been...

  • Page 118: Output Overcurrent Detection

    Troubleshooting SiBE041012_B 4.27 Output Overcurrent Detection Error Code Method of Error An output overcurrent is detected by checking the current that flows in the inverter DC section. Detection Error Decision A position signal error occurs while the compressor is running. A speed error occurs while the compressor is running.
  • Page 119 SiBE041012_B 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 Refer to P.114 overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again.

  • Page 120: Check

    Check SiBE041012_B 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 121: Fan Motor Connector Output Check

    SiBE041012_B Check Fan Motor Connector Output 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 122: Outdoor Electronic Expansion Valve Check

    Check SiBE041012_B Outdoor Electronic Expansion Valve Check Check No.12 Conduct the followings to check the outdoor 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 generates a latching sound. 3.

  • Page 123: Four Way Valve Performance Check

    SiBE041012_B Check Four Way Valve Performance Check Check No.13 Turn the power off and then 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 124: Inverter Analyzer Check

    Check SiBE041012_B Inverter Analyzer Check Check No.15 Characteristics Inverter analyzer: RSUK0917C If an abnormal stop occurs due to compressor startup failure or overcurrent output when using an inverter unit, it is difficult to judge whether the stop is caused by the compressor failure or some other failure (main PCB, power module, etc.).
  • Page 125 SiBE041012_B Check Diagnose method (Diagnose according to 6 LEDs lighting status.) (1) If all the LEDs are lit uniformly, the compressor is defective. → Replace the compressor. (2) If the LEDs are not lit uniformly, check the power module. → Refer to Check No.22. (3) If NG in Check No.22, replace the power module.

  • Page 126: Rotation Pulse Check On The Outdoor Unit Pcb

    Check SiBE041012_B Rotation Pulse Check on the Outdoor Unit PCB Check No.16 25/35 class 1. Check that the voltage between the pins 10 - 11 is 15 VDC. 2. Check if the Hall IC generates the rotation pulse (0 ~ 15 VDC) 4 times between the pins 10 - 12, 10 - 13, when the fan motor is manually rotated once.

  • Page 127: Installation Condition Check

    SiBE041012_B Check 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 128: Outdoor Fan System Check

    Check SiBE041012_B 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. 16. Outdoor fan system is functioning. (R15001) 5.12 Main Circuit Short Check Check No.20 25/35 class, RXG50K3V1B only Note:...

  • Page 129: Capacitor Voltage Check

    SiBE041012_B Check RXG50K3V1B Tester (R14700) 5.13 Capacitor Voltage Check Check No.21 RXG50K2V1B only 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.

  • Page 130: Power Module Check

    Check SiBE041012_B 5.14 Power Module Check Check No.22 Note: Check to make sure that the voltage between (+) and (–) of the power module 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 131 SiBE041012_B Check RXG50K2V1B Power module (R16073) RXG50K3V1B Power module (R16692) Service Diagnosis...

  • Page 132: Part 7 Trial Operation And Field Settings

    SiBE041012_B Part 7 Trial Operation and Field Settings 1. Pump Down Operation................123 2. Forced Cooling Operation ..............124 3. Trial Operation ..................126 4. Field Settings ..................127 4.1 When 2 Units are Installed in 1 Room..........127 4.2 Standby Electricity Saving..............128 4.3 Facility Setting Jumper (cooling at low outdoor temperature) ....129 4.4 Jumper and Switch Settings..............130 5.

  • Page 133: Pump Down Operation

    SiBE041012_B 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 134: Forced Cooling Operation

    Forced Cooling Operation SiBE041012_B 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 135 SiBE041012_B Forced Cooling Operation Outdoor Unit (RXG50K2V1B) S102 LED-A Forced cooling operation ON/OFF switch (R14963) Outdoor Unit (RXG50K3V1B) Forced cooling operation ON/OFF switch (SW1) Push Screwdriver (R18725) Caution • When pressing the switch, do not touch the terminal board. It has a high voltage and may cause electric shock.

  • Page 136: Trial Operation

    Trial Operation SiBE041012_B 3. Trial Operation Outline 1. Measure the power supply voltage and make sure that it falls within the specified range. 2. Trial operation should be carried out in either cooling or heating operation. 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 137: Field Settings

    SiBE041012_B Field Settings 4. Field Settings When 2 Units are Installed in 1 Room Outline When 2 indoor units are installed in 1 room, 1 of the 2 indoor units and the corresponding wireless remote controller can be set for different addresses. Both the indoor unit PCB and the wireless remote controller need alteration.

  • Page 138: Standby Electricity Saving

    Field Settings SiBE041012_B Standby Electricity Saving Outline 25/35 Class Only This function turns OFF the power supply to the outdoor unit and sets the indoor unit into standby electricity saving mode, thus reducing the power consumption of the air conditioner. Detail The standby electricity saving function is turned OFF before shipping.

  • Page 139: Facility Setting Jumper (Cooling At Low Outdoor Temperature)

    SiBE041012_B Field Settings Facility Setting Jumper (cooling at low outdoor temperature) Outline RXG50K3V1B This function is limited only for facilities (the target of air conditioning is equipment (such as computer)). Never use it in a residence or office (the space where there is a human). Detail You can expand the operation range to –10°C by cutting jumper J6 on the outdoor unit PCB.

  • Page 140: Jumper And Switch Settings

    Field Settings SiBE041012_B Jumper and Switch Settings Indoor Unit Function Jumper When connected When cut (factory set) Fan speed setting Fan speed setting; Fan speed setting; “0” (The fan when compressor (on indoor unit PCB) Remote controller stops.) stops for thermostat setting OFF.

  • Page 141: Silicon Grease On Power Transistor / Diode Bridge

    SiBE041012_B Silicon Grease on Power Transistor / Diode Bridge 5. Silicon Grease on Power Transistor / Diode Bridge Outline Apply the specified silicon grease to the heat radiation part of a power transistor / diode bridge when you replace an outdoor unit PCB. The silicon grease encourages the heat radiation of a power transistor / diode bridge.

  • Page 142: Part 8 Appendix

    SiBE041012_B Part 8 Appendix 1. Piping Diagrams..................133 1.1 Indoor Unit....................133 1.2 Outdoor Unit ..................133 2. Wiring Diagrams..................135 2.1 Indoor Unit....................135 2.2 Outdoor Unit ..................135 3. Removal Procedure (Booklet No.) ............137 Appendix...

  • Page 143: Piping Diagrams

    SiBE041012_B Piping Diagrams 1. Piping Diagrams Indoor Unit FTXG25/35JV1BW(S)(A) FTXG50JV1BW(S)(A) INDOOR UNIT INDOOR UNIT 6.4CuT 6.4CuT HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR CROSS FLOW FAN CROSS FLOW FAN ON HEAT EXCH. ON HEAT EXCH. FIELD PIPING FIELD PIPING 6.4CuT 6.4CuT FAN MOTOR FAN MOTOR FIELD PIPING...
  • Page 144 Piping Diagrams SiBE041012_B RXG50K2V1B OUTDOOR UNIT HEAT EXCHANGER 7.9CuT OUTDOOR TEMPERATURE THERMISTOR 7.9CuT 7.9CuT 7.9CuT CAPILLARY TUBE 1 12.7CuT 7.9CuT MUFFLER 7.9CuT 4.0CuT 7.9CuT WITH 7.9CuT 4.0CuT 7.9CuT FILTER REFRIGERANT FLOW CAPILLARY TUBE 2 6.4CuT COOLING 7.9CuT CAPILLARY TUBE 3 4.0CuT HEATING HEAT...

  • Page 145: Wiring Diagrams

    SiBE041012_B Wiring Diagrams 2. Wiring Diagrams Indoor Unit FTXG25/35/50JV1BW(S)(A) : FRAME GROUND : FUSE H1P, H2P : PILOT LAMP 3.15A C102 : FAN MOTOR OUTDOOR MR10 M1S, M2S : SWING MOTOR : STEPPING MOTOR C101 INTELLIGENT EYE TRANSMISSION A1P~A3P : PRINTED CIRCUIT BOARD / YLW SENSOR CIRCUIT...
  • Page 146 Wiring Diagrams SiBE041012_B RXG50K2V1B Z5C X12A MRM20 POWER SUPPLY 3.15A MRM10 6(P) 7(N) TO INDOOR UNIT X11A 3.15 A PCB1 MRC/W SHEET METAL S101 INDOOR FIELD WIRING t° t° t° S102 PCB2 LED A (OUTDOOR) (DISCHARGE) (CONDENSER) OUTDOOR Z1C~Z5C : FERRITE CORE : TERMINAL STRIP MRM10, MRM20 : LIVE...

  • Page 147: Removal Procedure (Booklet No.)

    SiBE041012_B Removal Procedure (Booklet No.) 3. Removal Procedure (Booklet No.) Refer to the following booklets for removal procedure. ∗FTXG25/35/50JV1BW(S)(A) Refer to Si041256. ∗RXG25/35J2V1B, RXG25/35K2V1B Refer to Si001156. ∗RXG25/35K3V1B Refer to Si001273. ∗RXG50K2V1B Refer to Si001164. ∗RXG50K3V1B Refer to Si001274. Appendix...

  • Page 148: Revision History

    Revision History Month / Year Version Revised contents 04 / 2010 SiBE041012 First edition 06 / 2011 SiBE041012_A Model addition: FTXG50JV1BW(S), RXG25/35/50K2V1B 12 / 2012 SiBE041012_B Model addition: FTXG25/35/50JV1BA, RXG25/35/50K3V1B...
  • Page 149 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.

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