Daikin FVXG25K2V1B Service Manual
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Daikin FVXG25K2V1B Service Manual

Inverter pair floor standing type
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Service
Manual
Inverter Pair
Floor Standing Type K-Series
SiBE061121_A
[Applied Models]
Inverter Pair : Heat Pump

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Summary of Contents for Daikin FVXG25K2V1B

  • Page 1 SiBE061121_A Service Manual Inverter Pair Floor Standing Type K-Series [Applied Models] Inverter Pair : Heat Pump...
  • Page 2 SiBE061121_A Inverter Pair Floor Standing Type K-Series Heat Pump Indoor Unit FVXG25K2V1B FVXG35K2V1B FVXG50K2V1B Outdoor Unit RXG25K2V1B RXG25K3V1B RXG35K2V1B RXG35K3V1B RXG50K2V1B RXG50K3V1B The removal procedure for each model is separately bound. Refer to page 135 for the booklet number of applicable model.

  • Page 3: Table Of Contents

    SiBE061121_A 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 ..............4 1. Specifications ..................5 Part 3 Printed Circuit Board Connector Wiring Diagram ..... 9 1.
  • Page 4 SiBE061121_A Part 5 Remote Controller ............53 1. FVXG25/35/50K2V1B ................54 Part 6 Service Diagnosis............. 56 1. Troubleshooting with LED ..............58 1.1 Indoor Unit....................58 1.2 Outdoor Unit ...................58 2. Problem Symptoms and Measures ............59 3. Service Check Function ................60 4. Troubleshooting ..................63 4.1 Error Codes and Description ..............63 4.2 Indoor Unit PCB Abnormality ..............64 4.3 Freeze-up Protection Control or Heating Peak-cut Control....65...
  • Page 5 SiBE061121_A 5.10 Discharge Pressure Check..............113 5.11 Outdoor Fan System Check ..............114 5.12 Main Circuit Short Check..............114 5.13 Capacitor Voltage Check..............115 5.14 Power Module Check ................116 Part 7 Trial Operation and Field Settings......... 118 1. Pump Down Operation................119 2. Forced Cooling Operation ..............120 3.

  • Page 6: Introduction

    Introduction SiBE061121_A 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 SiBE061121_A 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 SiBE061121_A 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 SiBE061121_A 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 SiBE061121_A 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

    SiBE061121_A Part 1 List of Functions 1. Functions....................2 List of Functions...

  • Page 12: Functions

    Functions SiBE061121_A 1. Functions Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — — Function Clean Operation limit for cooling (°CDB) Photocatalytic deodorizing filter — — ~ 46 ~ 46 –15 –15 Air-purifying filter with photocatalytic Operation limit for heating (°CWB) —...
  • Page 13 SiBE061121_A Functions Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — — Function Clean Operation limit for cooling (°CDB) ~ 46 ~ 46 Photocatalytic deodorizing filter — — –15 –15 Air-purifying filter with photocatalytic Operation limit for heating (°CWB) —...

  • Page 14: Part 2 Specifications

    SiBE061121_A Part 2 Specifications 1. Specifications ..................5 Specifications...

  • Page 15: Specifications

    SiBE061121_A Specifications 1. Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FVXG25K2V1B FVXG35K2V1B Model RXG25K2V1B RXG35K2V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.3 ~ 3.0) 3.4 (1.3 ~ 4.5) 3.5 (1.4 ~ 3.8) 4.5 (1.4 ~ 5.0) Capacity Rated (Min.
  • Page 16 Specifications SiBE061121_A 50 Hz, 220 - 230 - 240 V Indoor Unit FVXG50K2V1B Model RXG50K2V1B Outdoor Unit Cooling Heating 5.0 (1.7 ~ 5.6) 5.8 (1.7 ~ 8.1) Capacity Rated (Min. ~ Max.) Btu/h 17,100 (5,800 ~ 19,100) 19,800 (5,800 ~ 27,600) kcal/h 4,300 (1,460 ~ 4,820) 4,990 (1,460 ~ 6,970)
  • Page 17 SiBE061121_A Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FVXG25K2V1B FVXG35K2V1B Model RXG25K3V1B RXG35K3V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.3 ~ 3.0) 3.4 (1.3 ~ 4.5) 3.5 (1.4 ~ 3.8) 4.5 (1.4 ~ 5.0) Capacity Rated (Min. ~ Max.)
  • Page 18 Specifications SiBE061121_A 50 Hz, 220 - 230 - 240 V Indoor Unit FVXG50K2V1B Model RXG50K3V1B Outdoor Unit Cooling Heating 5.0 (1.7 ~ 5.6) 5.8 (1.7 ~ 8.1) Capacity Rated (Min. ~ Max.) Btu/h 17,100 (5,800 ~ 19,100) 19,800 (5,800 ~ 27,600) kcal/h 4,300 (1,460 ~ 4,820) 4,990 (1,460 ~ 6,970)

  • Page 19: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiBE061121_A Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit.....................10 2. Outdoor Unit..................12 2.1 25/35 Class ....................12 2.2 RXG50K2V1B ..................14 2.3 RXG50K3V1B ..................15 Printed Circuit Board Connector Wiring Diagram...

  • Page 20: Indoor Unit

    Indoor Unit SiBE061121_A 1. Indoor Unit Main PCB 1) S1 Connector for fan motor 2) S2 Connector for terminal board 3) S6 Connector for swing motor 4) S21 Connector for centralized control (HA) 5) S26 Connector for service PCB 6) S30 Connector for indoor electronic expansion valve coil (motor operated valve coil) 7) S32...
  • Page 21 SiBE061121_A Indoor Unit Display PCB 1) S56 Connector for main PCB 2) S1W Forced cooling operation [ON/OFF] button ∗ Refer to page 120 for detail. 3) H1P LED for operation (green) 4) H2P LED for timer (yellow) 5) H3P LED for RADIANT operation (red) 3P273252-1 Service PCB 1) S27...

  • Page 22: Outdoor Unit

    Outdoor Unit SiBE061121_A 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 23 SiBE061121_A Outdoor Unit 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 24: Rxg50K2V1B

    Outdoor Unit SiBE061121_A 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 25: Rxg50K3V1B

    SiBE061121_A Outdoor Unit 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 26 Outdoor Unit SiBE061121_A 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 27: Part 4 Function And Control

    SiBE061121_A Part 4 Function and Control 1. Main Functions..................18 1.1 Temperature Control ................18 1.2 Frequency Principle................18 1.3 Airflow Direction Control.................20 1.4 Fan Speed Control for Indoor Unit ............21 1.5 RADIANT Operation................22 1.6 Program Dry Operation ................24 1.7 Automatic Operation................25 1.8 Thermostat Control.................26 1.9 NIGHT SET Mode ..................27 1.10 ECONO Operation .................28 1.11 Inverter POWERFUL Operation .............29...

  • Page 28: Main Functions

    Main Functions SiBE061121_A 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 29 SiBE061121_A Main Functions 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 30: Airflow Direction Control

    Main Functions SiBE061121_A Airflow Direction Control Wide-Angle The louvers, made of elastic synthetic resin, provide a wide range of airflow that guarantees a comfortable air distribution. Louvers You can adjust the position of the louvers. (R14632) (R14633) Auto-Swing The swinging range of the flap is the same in any operation mode. (R14634) Function and Control...

  • Page 31: Fan Speed Control For Indoor Unit

    SiBE061121_A 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 32: Radiant Operation

    Main Functions SiBE061121_A RADIANT Operation The RADIANT operation has 2 operation modes. RADIANT 1: RADIANT operation with heating RADIANT 2: RADIANT operation only 1.5.1 Indoor Electronic Expansion Valve (Motor Operated Valve) Control Initializing with The indoor electronic expansion valve is initialized when turning on the power. Power ON Opening Limit Opening limit control limits the opening of the indoor electronic expansion valve in order to keep...
  • Page 33 SiBE061121_A Main Functions 1.5.2 Indoor Unit Fan Control The movement of the indoor unit fan is different whether in RADIANT 1 or RADIANT 2. RADIANT 1 starts. Room temperature Set temperature Note: The only difference between RADIANT 1 and RADIANT 2 is the Room temperature movement of the indoor unit fan.

  • Page 34: Program Dry Operation

    Main Functions SiBE061121_A 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 35: Automatic Operation

    SiBE061121_A 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 36: Thermostat Control

    Main Functions SiBE061121_A 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 37: Night Set Mode

    SiBE061121_A 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 38: Econo Operation

    Main Functions SiBE061121_A 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 39: Inverter Powerful Operation

    SiBE061121_A Main Functions 1.11 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Detail When the [POWERFUL] button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes.

  • Page 40: Clock Setting

    Main Functions SiBE061121_A 1.12 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 41: Weekly Timer Operation

    SiBE061121_A Main Functions 1.13 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 42 Main Functions SiBE061121_A To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C 27˚C...
  • Page 43 SiBE061121_A 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 44 Main Functions SiBE061121_A 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 45 SiBE061121_A 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 46 Main Functions SiBE061121_A 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 47: Other Functions

    SiBE061121_A Main Functions 1.14 Other Functions 1.14.1 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 48 Main Functions SiBE061121_A 1.14.6 Brightness Setting of the Indoor Unit Display Each time you press the [Brightness] button on the remote controller, the brightness of the indoor unit display changes to “high”, “low”, or “off”. Refer to the operation manual for details. Indoor unit display Timer lamp (yellow) Operation lamp...

  • Page 49: Function Of Thermistor

    SiBE061121_A Function of Thermistor 2. Function of Thermistor Outdoor electronic expansion valve Indoor electronic (4) φ 4 expansion valve (Motor operated valve) Radiant panel Four way valve (4) φ 6 Compressor (R14640) (1) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling the target discharge pipe temperature.

  • Page 50: Control Specification

    Control Specification SiBE061121_A 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 51: Frequency Control

    SiBE061121_A Control Specification Frequency Control Outline Frequency is determined according to the difference between the room thermistor temperature and the target temperature. The function is explained as follows. 1. How to determine frequency 2. Frequency command from the indoor unit (Difference between the room thermistor temperature and the target temperature) 3.
  • Page 52 Control Specification SiBE061121_A 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 53: Controls At Mode Changing / Start-Up

    SiBE061121_A Control Specification 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 54: Discharge Pipe Temperature Control

    Control Specification SiBE061121_A 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 55: Input Current Control

    SiBE061121_A Control Specification 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 56: Freeze-Up Protection Control

    Control Specification SiBE061121_A 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 57: Outdoor Fan Control

    SiBE061121_A Control Specification Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF control during defrosting The outdoor fan is turned OFF during defrosting.

  • Page 58: Defrost Control

    Control Specification SiBE061121_A 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 59: Outdoor Electronic Expansion Valve Control

    SiBE061121_A Control Specification 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 60: Pressure Equalizing Control

    Control Specification SiBE061121_A 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 61 SiBE061121_A Control Specification 3.11.7 Control for Disconnection of the Discharge Pipe Thermistor Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the 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 62: Malfunctions

    Control Specification SiBE061121_A 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 63: Part 5 Remote Controller

    SiBE061121_A Part 5 Remote Controller 1. FVXG25/35/50K2V1B ................54 Remote Controller...

  • Page 64: Fvxg25/35/50K2V1B

    Refer to the following pages for detail. 1 RADIANT operation P.22 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 65: Mode Button

    4 Auto swing setting P.20 7 Clock setting P.30 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 66: Part 6 Service Diagnosis

    SiBE061121_A Part 6 Service Diagnosis 1. Troubleshooting with LED ..............58 1.1 Indoor Unit....................58 1.2 Outdoor Unit ...................58 2. Problem Symptoms and Measures ............59 3. Service Check Function ................60 4. Troubleshooting ..................63 4.1 Error Codes and Description ..............63 4.2 Indoor Unit PCB Abnormality ..............64 4.3 Freeze-up Protection Control or Heating Peak-cut Control....65 4.4 Fan Motor (DC Motor) or Related Abnormality........66 4.5 Radiant Panel Temperature Rise, Indoor Electronic Expansion Valve...
  • Page 67 SiBE061121_A 5.9 Installation Condition Check..............113 5.10 Discharge Pressure Check..............113 5.11 Outdoor Fan System Check ..............114 5.12 Main Circuit Short Check..............114 5.13 Capacitor Voltage Check..............115 5.14 Power Module Check ................116 Service Diagnosis...

  • Page 68: Troubleshooting With Led

    Troubleshooting with LED SiBE061121_A 1. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions.

  • Page 69: Problem Symptoms And Measures

    SiBE061121_A Problem Symptoms and Measures 2. Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page The unit does not operate. Check the power supply. Check if the rated voltage is supplied. — Check the type of the indoor unit. Check if the indoor unit type is compatible with —...

  • Page 70: Service Check Function

    Service Check Function SiBE061121_A 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 71 SiBE061121_A Service Check Function 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 72 Service Check Function SiBE061121_A 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 73: Troubleshooting

    SiBE061121_A Troubleshooting 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 74: Indoor Unit Pcb Abnormality

    Troubleshooting SiBE061121_A 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 75: Freeze-Up Protection Control Or Heating Peak-Cut Control

    SiBE061121_A Troubleshooting 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 76: Fan Motor (Dc Motor) Or Related Abnormality

    Troubleshooting SiBE061121_A 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 77 SiBE061121_A Troubleshooting 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.107 and rotate the fan by hand. Does the fan Replace the indoor rotate smoothly? fan motor.

  • Page 78: Radiant Panel Temperature Rise, Indoor Electronic Expansion Valve (Motor Operated Valve) Abnormality, Freeze-Up Protection Control

    Troubleshooting SiBE061121_A Radiant Panel Temperature Rise, Indoor Electronic Expansion Valve (Motor Operated Valve) Abnormality, Freeze-up Protection Control Error Code Method of Error Radiant panel temperature rise During RADIANT operation, high temperature control (e.g., operation halt, indoor electronic Detection expansion valve closure) is activated according to the temperature detected by the radiant panel thermistors.
  • Page 79 SiBE061121_A Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 ∗ When the outdoor temperature is below the Check the operation condition. Refer to P.106 lower limit for cooling operation (10˚C), the freeze-up protection control is activated and the cooling operation stops.

  • Page 80: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting SiBE061121_A Thermistor or Related Abnormality (Indoor Unit) C4 , C9 , CE 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 81: Refrigerant Shortage

    SiBE061121_A 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 82 Troubleshooting SiBE061121_A 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 83 SiBE061121_A 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.106 Any thermistor Replace the thermistor(s) disconnected? ∗ Discharge pipe thermistor position. ∗ Indoor or outdoor heat exchanger thermistor ∗...

  • Page 84: Low-Voltage Detection Or Over-Voltage Detection

    Troubleshooting SiBE061121_A 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 85 SiBE061121_A 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 86: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    Troubleshooting SiBE061121_A 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 abnormal.
  • Page 87 SiBE061121_A 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.107 Check the power supply voltage. Voltage as rated? Correct the power supply. Check the indoor unit - outdoor unit connection wires.

  • Page 88: Signal Transmission Error On Outdoor Unit Pcb (Rxg50K2V1B Only)

    Troubleshooting SiBE061121_A 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 89: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    SiBE061121_A 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 90: Outdoor Unit Pcb Abnormality

    Troubleshooting SiBE061121_A 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 91 SiBE061121_A 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 92: Ol Activation (Compressor Overload)

    Troubleshooting SiBE061121_A 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 93 SiBE061121_A 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.106 Discharge pipe thermistor Insert the thermistor in disconnected? position. Check No.12 Refer to P.108 Check No.

  • Page 94: Compressor Lock

    Troubleshooting SiBE061121_A 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 95: Dc Fan Lock

    SiBE061121_A 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 96: Input Overcurrent Detection

    Troubleshooting SiBE061121_A 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 97: Four Way Valve Abnormality

    SiBE061121_A 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 98 Troubleshooting SiBE061121_A 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.106 Correct the four way valve disconnected (loose)? coil. Check No.13 Refer to P.109 Harness out of connector? Reconnect the harness.

  • Page 99: Discharge Pipe Temperature Control

    SiBE061121_A 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 100: High Pressure Control In Cooling

    Troubleshooting SiBE061121_A 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 101: Compressor System Sensor Abnormality

    SiBE061121_A 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 converted to voltage value) Conditions The DC voltage before compressor start-up is below 50 V.
  • Page 102 Troubleshooting SiBE061121_A 4.20.2 RXG50K2V1B Error Code Method of Error The system checks the power supply voltage and the DC voltage before the compressor Detection starts. 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. The compressor current does not run when the compressor starts.

  • Page 103: Position Sensor Abnormality

    SiBE061121_A 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 104 Troubleshooting SiBE061121_A 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.110 Turn off the power. Check No.18 Check the power supply voltage. Refer to P.113 Voltage as rated? Correct the power supply.
  • Page 105 SiBE061121_A 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.110 Turn off the power. Check No.18 Check the power supply voltage. Refer to P.113 Voltage as rated? Correct the power supply.

  • Page 106: Dc Voltage / Current Sensor Abnormality (25/35 Class Only)

    Troubleshooting SiBE061121_A 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 107: Ct Or Related Abnormality (Rxg50K2V1B Only)

    SiBE061121_A 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 108 Troubleshooting SiBE061121_A 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.110 again. Check No.21 Start operation. Refer to P.115 ∗...

  • Page 109: Thermistor Or Related Abnormality (Outdoor Unit)

    SiBE061121_A 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 110 Troubleshooting SiBE061121_A 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.106 Turn on the power again. Error displayed Reconnect the connectors again on remote...

  • Page 111: Electrical Box Temperature Rise

    SiBE061121_A 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 112: Radiation Fin Temperature Rise

    Troubleshooting SiBE061121_A 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 113 SiBE061121_A 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.113 again to start the system. Check No.19 Refer to P.114 Has the PCB been...

  • Page 114: Output Overcurrent Detection

    Troubleshooting SiBE061121_A 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 115 SiBE061121_A 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.110 overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again.

  • Page 116: Check

    Check SiBE061121_A 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 117: Fan Motor Connector Output Check

    SiBE061121_A 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 118: Electronic Expansion Valve Check

    Check SiBE061121_A Electronic Expansion Valve Check Check No.12 Conduct the followings to check the electronic expansion valve (EV). 1. Check to see if the EV connector is correctly connected to the PCB. 2. Turn the power off and on again, and check to see if the EV generates a latching sound. 3.

  • Page 119: Four Way Valve Performance Check

    SiBE061121_A 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 120: Inverter Analyzer Check

    Check SiBE061121_A 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 121 SiBE061121_A 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 122: Rotation Pulse Check On The Outdoor Unit Pcb

    Check SiBE061121_A 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 123: Installation Condition Check

    SiBE061121_A 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 124: Outdoor Fan System Check

    Check SiBE061121_A 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 125: Capacitor Voltage Check

    SiBE061121_A 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 126: Power Module Check

    Check SiBE061121_A 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 127 SiBE061121_A Check RXG50K2V1B Power module (R16073) RXG50K3V1B Power module (R16692) Service Diagnosis...

  • Page 128: Part 7 Trial Operation And Field Settings

    SiBE061121_A Part 7 Trial Operation and Field Settings 1. Pump Down Operation................119 2. Forced Cooling Operation ..............120 3. Trial Operation ..................122 4. Field Settings ..................123 4.1 When 2 Units are Installed in 1 Room..........123 4.2 Standby Electricity Saving..............124 4.3 Facility Setting Jumper (cooling at low outdoor temperature) ....125 4.4 Jumper and Switch Settings..............126 5.

  • Page 129: Pump Down Operation

    SiBE061121_A 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 130: Forced Cooling Operation

    Forced Cooling Operation SiBE061121_A 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 131 SiBE061121_A 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 132: Trial Operation

    Trial Operation SiBE061121_A 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 133: Field Settings

    SiBE061121_A 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 134: Standby Electricity Saving

    Field Settings SiBE061121_A 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 135: Facility Setting Jumper (Cooling At Low Outdoor Temperature)

    SiBE061121_A Field Settings Facility Setting Jumper (cooling at low outdoor temperature) Outline RXG50K3V1B only 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 136: Jumper And Switch Settings

    Field Settings SiBE061121_A Jumper and Switch Settings Indoor Unit Function Jumper When connected When cut (factory set) Fan speed setting when Fan speed setting; Fan speed setting; “0” (The fan compressor stops for Remote controller stops.) thermostat OFF. (effective only setting in cooling operation) Power failure recovery function...

  • Page 137: Silicon Grease On Power Transistor / Diode Bridge

    SiBE061121_A 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 138: Part 8 Appendix

    SiBE061121_A Part 8 Appendix 1. Piping Diagrams..................129 1.1 Indoor Unit....................129 1.2 Outdoor Unit ..................130 2. Wiring Diagrams..................132 2.1 Indoor Unit....................132 2.2 Outdoor Unit ..................133 3. Removal Procedure (Booklet No.) ............135 Appendix...

  • Page 139: Piping Diagrams

    SiBE061121_A Piping Diagrams 1. Piping Diagrams Indoor Unit FVXG25/35K2V1B FVXG50K2V1B INDOOR UNIT INDOOR UNIT RADIANT PANEL THERMISTOR 6.4CuT RADIANT PANEL THERMISTOR 6.4CuT THERMISTOR THERMISTOR HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR ON HEAT EXCH. ON HEAT EXCH. CROSS FLOW FAN CROSS FLOW FAN FIELD PIPING FIELD PIPING 6.4CuT...

  • Page 140: Outdoor Unit

    Piping Diagrams SiBE061121_A Outdoor Unit RXG25/35K2V1B, RXG25/35K3V1B OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 7.0CuT 7.0CuT ELECTRONIC EXPANSION HEAT EXCHANGER VALVE THERMISTOR 4.8CuT 6.4CuT 6.4CuT 4.8CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER WITH FILTER FOUR WAY FIELD PIPING VALVE ON: HEATING...
  • Page 141 SiBE061121_A Piping Diagrams RXG50K3V1B OUTDOOR UNIT HEAT EXCHANGER 7.9CuT OUTDOOR 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 FILTER REFRIGERANT FLOW 6.4CuT CAPILLARY TUBE 2 COOLING 7.9CuT CAPILLARY TUBE 3 4.0CuT HEATING HEAT...

  • Page 142: Wiring Diagrams

    Wiring Diagrams SiBE061121_A 2. Wiring Diagrams Indoor Unit FVXG25/35/50K2V1B PCB1 PCB3 → RECTIFIER 3.15A S2W(4) outdoor MR10 GRN/YLW PCB2 C102 FIELD WIRING. SIGNAL RECEIVER TRANSMISSION CAUTION CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS C101 TURNED OFF AND THEN BACK 1 RED ON AGAIN.

  • Page 143: Outdoor Unit

    SiBE061121_A Wiring Diagrams Outdoor Unit RXG25/35K2V1B, RXG25/35K3V1B FIELD WIRING. INDOOR MRM20 IPM1 MRM10 C119 MR30 3.15A PCB2 3.15A W V U IPM2 MR30_A MR30_B MRCW S100 PCB1 S80 1 X11A 10 12 OUTDOOR NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. : CAPACITOR C5 , C6 , C119 t˚...
  • Page 144 Wiring Diagrams SiBE061121_A RXG50K3V1B FIELD WIRING indoor TO INDOOR UNIT POWER SUPPLY outdoor NOTE 1.REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. C7, C8 : CAPACITOR DB1, DB3 : DIODE BRIDGE IN CASE OF FU1, FU2, FU3 : FUSE (OUTDOOR) (DISCHARGE) COOLING ONLY TYPE (CONDENSER)

  • Page 145: Removal Procedure (Booklet No.)

    SiBE061121_A Removal Procedure (Booklet No.) 3. Removal Procedure (Booklet No.) Refer to the following booklets for removal procedure. ∗FVXG25/35/50K2V1B Refer to Si061263. ∗RXG25/35K2V1B Refer to Si001156. ∗RXG25/35K3V1B Refer to Si001273. ∗RXG50K2V1B Refer to Si001164. ∗RXG50K3V1B Refer to Si001274. Appendix...

  • Page 146: Revision History

    Revision History Month / Year Version Revised contents 07 / 2011 SiBE061121 First edition 12 / 2012 SiBE061121_A Model addition: RXG25/35/50K3V1B...
  • Page 147 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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