Daikin VRV RXYMQ-A Series Service Manual
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Daikin VRV RXYMQ-A Series Service Manual

R-410a heat pump 50/60 hz
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SiME332106E
Service
Manual
RXYMQ-A Series
Heat Pump 50/60 Hz

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Summary of Contents for Daikin VRV RXYMQ-A Series

  • Page 1 SiME332106E Service Manual RXYMQ-A Series Heat Pump 50/60 Hz...
  • Page 2 SiME332106E Introduction ..................1 1. Safety Cautions..................2 1.1 Warnings and Cautions Regarding Safety of Workers......2 1.2 Warnings and Cautions Regarding Safety of Users.........4 2. Icons Used ....................6 3. Revision History ..................7 Part 1 General Information ............8 1. Model Names ..................9 1.1 Outdoor Unit .....................9 1.2 VRV Indoor Unit ..................9 2.
  • Page 3 SiME332106E Part 4 Functions and Control ............49 1. Operation Flowchart................50 2. Stop Control ..................51 2.1 Abnormal Shutdown ................51 2.2 When System is in Stop Control.............51 3. Standby Control ..................52 3.1 Restart Standby..................52 3.2 Crankcase Heater Control..............52 4. Startup Control ..................53 4.1 Cooling Startup Control ................53 4.2 Heating Startup Control................53 5.
  • Page 4 SiME332106E 1.5 Operation Control Mode ...............106 2. Field Settings for Outdoor Unit............108 2.1 Function Setting ...................108 2.2 Settings by DIP Switches ..............109 2.3 Settings by BS Buttons.................112 2.4 Normal Mode..................114 2.5 Monitor Mode (Mode 1) ................115 2.6 Setting Mode (Mode 2).................118 2.7 Eco Mode Setting .................130 2.8 Night-Time Low Noise Operation and Demand Operation....131 3.
  • Page 5 SiME332106E 5.20 Infrared Presence/Floor Sensor Error ..........188 5.21 Remote Controller Thermistor Abnormality ..........193 5.22 Outdoor Unit Main PCB Abnormality............194 5.23 Current Leakage Detection ..............195 5.24 Missing of Leakage Detection Core .............196 5.25 Activation of High Pressure Switch ............197 5.26 Activation of Low Pressure Sensor ............199 5.27 Compressor Motor Lock ...............200 5.28 Outdoor Fan Motor Abnormality ............202 5.29 Electronic Expansion Valve Coil Abnormality........205...
  • Page 6 SiME332106E 6. Check ....................271 6.1 High Pressure Check ................271 6.2 Low Pressure Check ................272 6.3 Superheat Operation Check..............273 6.4 Power Transistor Check ...............275 6.5 Refrigerant Overcharge Check.............278 6.6 Refrigerant Shortage Check..............279 6.7 Vacuuming and Dehydration Procedure ..........280 6.8 Thermistor Check .................281 6.9 Pressure Sensor Check ...............284 6.10 Broken Wire Check of the Relay Wires ..........285 6.11 Fan Motor Connector Check (Power Supply Cable) ......285...
  • Page 7 SiME332106E Introduction 1. Safety Cautions..................2 1.1 Warnings and Cautions Regarding Safety of Workers......2 1.2 Warnings and Cautions Regarding Safety of Users.........4 2. Icons Used ....................6 3. Revision History ..................7 Introduction...
  • Page 8 Safety Cautions SiME332106E 1. Safety Cautions Be sure to read the following safety cautions before conducting repair work. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer.
  • Page 9 SiME332106E Safety Cautions Warning Do not turn the air conditioner on or off by plugging in or unplugging the power cable. Plugging in or unplugging the power cable to operate the equipment may cause an electrical shock or fire. Be sure to wear a safety helmet, gloves, and a safety belt when working in a high place (more than 2 m).
  • Page 10 Safety Cautions SiME332106E Warnings and Cautions Regarding Safety of Users Warning Do not store the equipment in a room with fire sources (e.g., naked flames, gas appliances, electric heaters). Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work.
  • Page 11 SiME332106E Safety Cautions 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 is dusty or has a loose connection, it may cause an electrical shock or fire.
  • Page 12 Icons Used SiME332106E 2. Icons Used The following icons are used to attract the attention of the reader to specific information. Icon Type of Description Information Warning Warning is used when there is danger of personal injury. Warning Caution Caution is used when there is danger that the reader, Caution through incorrect manipulation, may damage equipment, lose data, get an unexpected result or have to restart (part...
  • Page 13 SiME332106E Revision History 3. Revision History Month / Year Version Revised contents 09 / 2021 SiME332106E First edition Introduction...

  • Page 14: Table Of Contents

    SiME332106E Part 1 General Information 1. Model Names ..................9 1.1 Outdoor Unit .....................9 1.2 VRV Indoor Unit ..................9 2. External Appearance................10 2.1 Outdoor Unit ...................10 2.2 VRV Indoor Unit ..................10 3. Capacity Range..................11 3.1 Connection Ratio..................11 3.2 Outdoor Unit Combinations ..............11 4.

  • Page 15: Model Names

    SiME332106E Model Names 1. Model Names Outdoor Unit Capacity range Power 11.3 14.1 16.0 supply, Standard Capacity index Heat Pump — — RXYMQ VMK: 1 phase, 220-240 V, 50/60 Hz (for Middle East) YFK: 3 phase, 380-415/400 V, 50/60 Hz (for Middle East) VRV Indoor Unit Capacity range 11.2...

  • Page 16: External Appearance

    External Appearance SiME332106E 2. External Appearance Outdoor Unit 4, 5, 6 HP RXYMQ4AVMK RXYMQ4AYFK RXYMQ5AYFK RXYMQ6AYFK VRV Indoor Unit Ceiling mounted cassette Round flow cassette with sensing FXFSQ-AR Ceiling concealed duct Slim duct (Standard type) Middle-high static pressure duct FXDQ-PD FXMQ-PB FXDQ-ND FXMQ-AR...

  • Page 17: Capacity Range

    SiME332106E Capacity Range 3. Capacity Range Connection Ratio Total capacity index of the indoor units Connection ratio = Capacity index of the outdoor units Type Min. connection ratio Max. connection ratio Single outdoor units 130% Outdoor Unit Combinations RXYMQ4AVMK Model RXYMQ5AYFK RXYMQ6AYFK RXYMQ4AYFK...

  • Page 18: Specifications

    Specifications SiME332106E 4. Specifications Model name RXYMQ4AVMK RXYMQ4AYFK Power supply 1 phase, 220-240 V, 50/60 Hz 3 phase, 380-415/400 V, 50/60 Hz 1 Cooling capacity at T1 Capacity 11.3 11.3 Capacity Btu/h 38,500 38,500 kW/kW 4.10 4.07 Btu/W·h 14.00 13.90 2.75 2.77 1...
  • Page 19 SiME332106E Specifications Model name RXYMQ5AYFK RXYMQ6AYFK Power supply 3 phase, 380-415/400 V, 50/60 Hz 3 phase, 380-415/400 V, 50/60 Hz 1 Cooling capacity at T1 Capacity 14.1 16.0 Capacity Btu/h 48,000 54,500 kW/kW 3.91 3.90 Btu/W·h 13.35 13.30 3.60 4.10 1 Cooling capacity at T1 Capacity...
  • Page 20 SiME332106E Part 2 Refrigerant Circuit 1. Refrigerant Circuit (Piping Diagrams) ...........15 1.1 Outdoor Unit ...................15 1.2 VRV Indoor Unit ..................18 2. Functional Parts Layout ................20 2.1 RXYMQ4AVMK ..................20 2.2 RXYMQ4/5/6AYFK.................22 Part 2 Refrigerant Circuit...

  • Page 21: Refrigerant Circuit Part

    SiME332106E Refrigerant Circuit (Piping Diagrams) 1. Refrigerant Circuit (Piping Diagrams) Outdoor Unit No. in Electric piping Name Function symbol diagram Compressor motor Compressor is operated in multi-steps according to Te. Fan motor The fan rotation speed is varied by using the inverter. Electronic expansion Fully open during cooling operation.
  • Page 22 Refrigerant Circuit (Piping Diagrams) SiME332106E RXYMQ4AVMK Part 2 Refrigerant Circuit...
  • Page 23 SiME332106E Refrigerant Circuit (Piping Diagrams) RXYMQ4/5/6AYFK Part 2 Refrigerant Circuit...

  • Page 24: Vrv Indoor Unit

    Refrigerant Circuit (Piping Diagrams) SiME332106E VRV Indoor Unit No. in piping Electric Name Applicable model Function diagram symbol Electronic expansion valve All indoor units Used for gas superheating degree control while in cooling or subcooling degree control while in heating. Suction air thermistor All indoor units Used for thermostat control.
  • Page 25 SiME332106E Refrigerant Circuit (Piping Diagrams)  FXAQ20/25/32/40/50AR  FXAQ63AR C: 4D122027A C: 4D121516A Part 2 Refrigerant Circuit...

  • Page 26: Functional Parts Layout

    Functional Parts Layout SiME332106E 2. Functional Parts Layout RXYMQ4AVMK Top View Thermistor (Subcooling heat exchanger gas pipe) (R6T) Thermistor (Suction pipe) (R3T) Electronic expansion valve High pressure sensor (Refrigerant auto charge) (S1NPH) (Y4E) High pressure switch Thermistor (Discharge pipe) (S1PH) (R21T) Side View Low pressure sensor...
  • Page 27 SiME332106E Functional Parts Layout Back view Thermistor (Heat exchanger deicer) (R7T) Thermistor (Heat exchanger liquid pipe) (R4T) C: 1P627964E Part 2 Refrigerant Circuit...

  • Page 28: Rxymq4/5/6Ayfk

    Functional Parts Layout SiME332106E RXYMQ4/5/6AYFK Top View Thermistor (Suction pipe) (R3T) High pressure sensor (S1NPH) High pressure switch (S1PH) Thermistor (Discharge pipe) (R21T) Side View Thermistor (Subcooling heat exchanger gas pipe) (R6T) Low pressure sensor Solenoid valve (Four way valve) (S1NPL) (Y1S) Thermistor (Outdoor Air)
  • Page 29 SiME332106E Functional Parts Layout Back view Thermistor (Heat exchanger deicer) (R7T) Thermistor (Heat exchanger liquid pipe) (R4T) C: 1P642649E Part 2 Refrigerant Circuit...
  • Page 30 SiME332106E Part 3 Remote Controller 1. Applicable Models .................25 2. Names and Functions ................27 2.1 BRC1E63 ....................27 2.2 BRC1H81 Series ..................29 2.3 BRC4M Series..................31 3. Main/Sub Setting...................34 3.1 Wired Remote Controller (BRC1E63) ............34 3.2 Wired Remote Controller (BRC1H81 Series) .........35 3.3 When Wireless Remote Controller is Used Together......36 4.

  • Page 31: Applicable Models

    SiME332106E Applicable Models 1. Applicable Models Wired remote controller Wireless remote controller Series Navigation Madoka Remote controller Receiver FXFSQ-AR BRC7M632F-6 (1) FXDQ-PD BRC1H81W7 FXDQ-ND BRC1E63 BRC4M150W16 BRC1H81S7 BRC4M61-6 FXMQ-PB FXMQ-AR FXAQ-AR BRC7N618-6 Note(s) 1. Some functions are not available depending on the remote controller type. Refer to page 26 for details.
  • Page 32 Applicable Models SiME332106E Function list FXFSQ-AR Category Function BRC1E63 BRC4M150 ON/OFF operation ● ● Operation mode switching ● ● Setting temperature ● ● Swing pattern selection ● ● Switchable fan speed (Ventilation amount) ● ● Display switching function ● — Basic performance Backlight function ●...

  • Page 33: Names And Functions

    SiME332106E Names and Functions 2. Names and Functions BRC1E63 (1) Mode Selector button (6) Right button Used to highlight the next items on the Used to select the operation mode. right-hand side. (2) Airflow Setting button Display contents are changed to next Used to indicate the Airflow Rate (Air screen per page.
  • Page 34 Names and Functions SiME332106E Mode Access Operation On power-up, the message Checking the connection. Please stand by. will be displayed on the remote controller screen. Then that message will disappear and the basic screen will be displayed. To access a mode from the basic screen, refer to the figure below. When any of the operation buttons is pressed, the backlight will come on and remains lit for about 30 seconds.

  • Page 35: Brc1H81 Series

    SiME332106E Names and Functions BRC1H81 Series (3) (2) (4) ON/OFF  When OFF, press to turn ON the system. As a result, the status indicator (5) will turn ON too.  When ON, press to turn OFF the system. As a result, the status indicator (5) will turn OFF too.
  • Page 36 The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and use of such marks by Daikin Europe N.V. is under license. Other trademarks and trade names are those of their respective owners.

  • Page 37: Brc4M Series

    SiME332106E Names and Functions BRC4M Series 2.3.1 Remote Controller FAN SPEED CONTROL BUTTON DISPLAY (SIGNAL TRANSMISSION) Press this button to select the fan speed. This blinks when a signal is being transmitted. TEMPERATURE SETTING BUTTON DISPLAY (OPERATION MODE) Use this button for SETTING TEMPERATURE. This display shows the current OPERATION BACKLIGHT BUTTON MODE.
  • Page 38 Names and Functions SiME332106E 2.3.2 Signal Receiver Unit EMERGENCY OPERATION SWITCH This switch is readily used if the remote controller does not work. RECEIVER This receives the signals from the remote controller. OPERATING INDICATOR LAMP (Red) This lamp stays lit while the air conditioner runs.
  • Page 39 SiME332106E Names and Functions 2.3.3 How to Check Initial Set Value Press the INSPECTION button to check the initial set value. Press the INSPECTION button twice to return to the normal mode. Initial set value Indoor unit model type Initial set value Round flow cassette with sensing FXFSQ-AR 2111...

  • Page 40: Main/Sub Setting

    Main/Sub Setting SiME332106E 3. Main/Sub Setting Main/Sub setting is necessary when 1 indoor unit is controlled by 2 remote controllers. The remote controllers are set at factory to Main, so you have to change one remote controller from Main to Sub. To change a remote controller from Main to Sub, proceed as follows: Wired Remote Controller (BRC1E63) 3.1.1 Field Settings The designation of the main and sub remote controllers can be swapped.

  • Page 41: Wired Remote Controller (Brc1H81 Series)

    SiME332106E Main/Sub Setting 2. When 2 remote controllers are being used, it is not possible to change the setting from Main to Sub if one of the remote controllers is already set as Main. Wired Remote Controller (BRC1H81 Series) When using 1 remote controller Once the controller is powered, it will automatically start up: If it is the first and only controller that is connected to the indoor unit, it will automatically get designated as master controller.

  • Page 42: When Wireless Remote Controller Is Used Together

    Main/Sub Setting SiME332106E Result: The controller is now designated as slave. Note(s) The following functions are not available for slave controllers:  Auto operation mode  Individual airflow direction  Filter auto clean  Setback temperature setpoints  Draft prevention ...

  • Page 43: Address Setting For Wireless Remote Controller

    SiME332106E Address Setting for Wireless Remote Controller 4. Address Setting for Wireless Remote Controller If setting multiple wireless remote controllers to operate in one room, perform address setting for the receiver and the wireless remote controller. (This includes an individual remote controller control using the group operation.) (For the wiring for the group operation, please refer to the installation manual attached to the indoor unit and technical guide.) Setting for Signal Receiver PCB...

  • Page 44: Setting For Brc4M Series

    Address Setting for Wireless Remote Controller SiME332106E Setting for BRC4M Series The address for the wireless remote controller is set to 1 at the factory. To change the setting, proceed as follows: 1. Hold down the FILTER SIGN RESET button and the INSPECTION button for at least 4 seconds to get the Field Setting mode.

  • Page 45: Multiple Settings A/B

    SiME332106E Address Setting for Wireless Remote Controller Multiple Settings A/b The command such as operation mode or temperature setting by this remote controller will be rejected when the target indoor unit operation is restricted as by an external control such as centralized control.

  • Page 46: Centralized Control Group No. Setting

    Centralized Control Group No. Setting SiME332106E 5. Centralized Control Group No. Setting BRC1E63 Group No. Setting (Group) Basic screen is displayed. Press and hold Press the Cancel the Cancel button button once. for 4 seconds or more. Select Group Address and then press the Menu/Enter button.
  • Page 47 SiME332106E Centralized Control Group No. Setting Group No. Setting (Unit) Basic screen is displayed. Press and hold Press the Cancel the Cancel button button once. for 4 seconds or Select Group Address more. and then press the Menu/Enter button. Service Item 2 is settings menu displayed.

  • Page 48: Brc1H81 Series

    Centralized Control Group No. Setting SiME332106E BRC1H81 Series Group address To control the system with central control equipment, you need to set addresses for:  Groups (Group) and/or  Units (Group (Unit)). The Group address menu has two levels. You define groups and/or units in the first level, and set or release addresses for those groups and/or units in the second.

  • Page 49: Group No. Setting Example

    SiME332106E Centralized Control Group No. Setting Group No. Setting Example Outdoor unit Indoor/Outdoor F1 F2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 Group Control by Remote Controller Main 1-00 (automatic unit address) 1-02 1-01 F1 F2 P1 P2...

  • Page 50: Service Settings Menu, Maintenance Menu

    Service Settings Menu, Maintenance Menu SiME332106E 6. Service Settings Menu, Maintenance Menu BRC1E63 Operating the remote controller allows service data to be acquired and various services to be set. Basic screen is displayed. Press and hold the Press the Cancel Cancel button button once.
  • Page 51 SiME332106E Service Settings Menu, Maintenance Menu 6.1.1 Service Settings Menu Service settings menu Item 2 Remarks Test Operation — — Maintenance Contact None — Maintenance Contact —, 0 to 9 (in order) Field Settings Indoor Unit No. — Mode No. —...
  • Page 52 Service Settings Menu, Maintenance Menu SiME332106E 6.1.2 Maintenance Menu Maintenance Item 2 Remarks Menu Model Name Unit No. Select the unit number you want to check. Indoor unit The model names are displayed. (A model code may be displayed instead, depending on Outdoor unit the particular model.) R-32 mark display...
  • Page 53 SiME332106E Service Settings Menu, Maintenance Menu Maintenance Item 2 Remarks Menu Addressed Unit No.: 0 - 15 Select the unit number you want to check. Sensor Code Value Remote controller thermistor (°C) Suction air thermistor (°C) 5 Heat exchanger liquid pipe thermistor (°C) Heat exchanger gas pipe thermistor (°C) Indoor unit address No.

  • Page 54: Brc1H81 Series

    Service Settings Menu, Maintenance Menu SiME332106E BRC1H81 Series 6.2.1 To enter the installer menu Press and keep it pressed until the information screen appears. The presence of icons on the information screen depends on operation status. The controller may display more or less icons than are indicated here.
  • Page 55 SiME332106E Part 4 Functions and Control 1. Operation Flowchart................50 2. Stop Control ..................51 2.1 Abnormal Shutdown ................51 2.2 When System is in Stop Control.............51 3. Standby Control ..................52 3.1 Restart Standby..................52 3.2 Crankcase Heater Control..............52 4. Startup Control ..................53 4.1 Cooling Startup Control ................53 4.2 Heating Startup Control................53 5.

  • Page 56: Operation Flowchart

    Operation Flowchart SiME332106E 1. Operation Flowchart For detailed description of each function in the flow below, refer to the details on related function on the following pages. Stop control (1) Abnormal shutdown (2) When system is in stop control Special control Standby control (1) Restart standby (2) Crankcase heater control...

  • Page 57: Stop Control

    SiME332106E Stop Control 2. Stop Control Abnormal Shutdown In order to protect compressors, if any of the abnormal state occurs, the system will make "stop with thermostat OFF" and the error will be determined according to the number of retry times. (Refer to Error Codes and Descriptions on page 153 for the items to determine the error.) When System is in Stop Control The four way valve retains the condition before it was stopped.

  • Page 58: Standby Control

    Standby Control SiME332106E 3. Standby Control Restart Standby Used to forcedly stop the compressor for a period of 5 minutes, in order to prevent the frequent ON/OFF of the compressor and equalize the pressure within the refrigerant system. In addition, the outdoor fan carry out the residual operation for a while to accelerate pressure equalizing and to suppress melting of the refrigerant to the evaporator.

  • Page 59: Startup Control

    SiME332106E Startup Control 4. Startup Control This control is used to equalize the pressure in the front and back of the compressor prior to the startup of the compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor. To avoid stresses to the compressor due to oil return or else after the startup, the following control is made and the position of the four way valve is also determined.

  • Page 60: Normal Control

    Normal Control SiME332106E 5. Normal Control List of Functions in Normal Control Pc : High pressure sensor detection value Pe : Low pressure sensor detection value Tc : High pressure equivalent saturation temperature Te : Low pressure equivalent saturation temperature Cooling Electric Part Name...

  • Page 61: Compressor Control

    SiME332106E Normal Control Compressor Control In order to provide a steady capacity, the compressor capacity is controlled to achieve temperature Te (or Tc) during cooling (or heating) operation. During cooling (or heating) operation The compressor capacity is controlled so Te (or Tc) approaches TeS (or TcS) (target value of temperature).

  • Page 62: Compressor Capacity Control

    Normal Control SiME332106E Compressor Capacity Control Tc : High pressure equivalent saturation temperature Te : Low pressure equivalent saturation temperature Capacity steps The compressor rotation speed is changed according to the control pressure.  Cooling: suction pressure sensor value is converted into evaporation saturated temperature (relation between pressure and evaporating temperature based on characteristics of refrigerant R-410A).

  • Page 63: Compressor Step Control

    SiME332106E Normal Control Compressor Step Control  The actual rotation speed per second of the compressor (rps) depends on the type of compressor.  The control can skip a number of steps to reach faster the target saturation temperature. RXYMQ4AVMK RXYMQ4-6AYFK Frequency (Hz) Frequency (Hz)

  • Page 64: Electronic Expansion Valve Control

    Normal Control SiME332106E Electronic Expansion Valve Control Electronic expansion valve Y1E  Cooling: electronic expansion valve is used only at fully closed or fully open condition:  Compressor(s) OFF: fully closed (0 pulse).  Compressor ON:  Fully open (480 pulses) ...

  • Page 65: Protection Control

    SiME332106E Protection Control 6. Protection Control High Pressure Protection Control This high pressure protection control is used to prevent the activation of protection devices due to abnormal increase of high pressure and to protect compressors against the transient increase of high pressure. Cooling The following control is performed in the entire system.

  • Page 66: Low Pressure Protection Control

    Protection Control SiME332106E Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. Cooling Because of common low pressure, the following control is performed in the system. Normal control Pe: Low pressure sensor detection Pe <...

  • Page 67: Inverter Protection Control

    SiME332106E Protection Control Inverter Protection Control Inverter current protection control and radiation fin temperature control are performed to prevent tripping due to an abnormality, or transient inverter overcurrent, and fin temperature increase. Inverter overcurrent protection control by primary current [CTi1] Normal control Reduce compressor step Cooling...
  • Page 68 Protection Control SiME332106E Graph B Ta (°C) Inverter overcurrent protection control by secondary current [CTi2] Normal control Compressor max step Next compressor rps is lower than current rps & Set current step as max limit Reduce compressor step Inverter current standby Cooling Condition Secondary current [CTi2] (A)
  • Page 69 SiME332106E Protection Control Radiation fin temperature control This control is performed for each compressor. Normal control Reduce compressor capacity When occurring 4 times within 60 Fin temperature standby minutes, the error code L4 is output. Cooling Condition All compressors more than 91 °C less than 89 °C more than 110 °C Heating...

  • Page 70: Heating Operation Prohibition

    Protection Control SiME332106E Heating Operation Prohibition  When outdoor air temperature becomes high, outdoor unit cannot perform heating because:  Low pressure sensor can give pressure value above upper limit of sensor: error JC.  Mechanical internal load on compressor increases. ...

  • Page 71: Special Control

    SiME332106E Special Control 7. Special Control Pump Down Residual Control Pc : High pressure sensor detection value Pe : Low pressure sensor detection value To avoid refrigerant emigration when outdoor unit stops operation (thermostat or safety), all electronic expansion valves are closed. Oil Return Control In order to prevent the compressor from running out of oil, the oil return control is conducted to recover oil that has flowed out from the compressor to the system side.
  • Page 72 Special Control SiME332106E 7.2.2 Oil Return Control in Heating Operation Electric Part Name RXYMQ-A Function Symbol Compressor motor RXYMQ4AVMK: 70 rps  RXYMQ4-6AYFK: 79 rps Fan motor With high pressure  OFF ←→ Step 4 ←→ Step 6 Electronic expansion valve 480 pulses ...

  • Page 73: Defrost Control

    SiME332106E Special Control Defrost Control To defrost the outdoor heat exchanger while in evaporator, the defrost control is conducted to recover the heating capacity. Tc : High pressure equivalent saturation temperature Te : Low pressure equivalent saturation temperature Starting conditions ...

  • Page 74: Outline Of Control (Indoor Unit)

    Outline of Control (Indoor Unit) SiME332106E 8. Outline of Control (Indoor Unit) Set Temperature and Control Target Temperature 8.1.1 Without Optional Infrared Floor Sensor The relationship between remote controller set temperature and control target temperature is described below.  When the suction air thermistor is used for controlling (Factory setting), the control target temperature is determined as follows to prevent insufficient heating in heating operation.

  • Page 75: Thermostat Control

    SiME332106E Outline of Control (Indoor Unit) Regarding control target temperature When using the infrared presence/floor sensor, the temperature around people will be treated as the control target temperature for operation. What is the temperature around people? The temperature around people refers to the temperature of the living space, obtained from the temperature around the ceiling and the temperature underfoot.
  • Page 76 Outline of Control (Indoor Unit) SiME332106E 8.2.2 With Optional Infrared Presence/Floor Sensor The thermostat ON/OFF condition is determined by the difference between the remote controller set temperature and the detected temperature around people.  Normal operation  Cooling operation ΔT ≤ –1.0°C Normal operation Thermostat OFF (Thermostat ON)
  • Page 77 SiME332106E Outline of Control (Indoor Unit) 8.2.3 Thermostat Control with Operation Mode Set to "AUTO" When the operation mode is set to "AUTO" on the remote controller, the system will conduct the temperature control shown below. Furthermore, setting changes of the differential value (D°C) can be made according to information in the Field Settings from Remote Controller on page 84 and later.

  • Page 78: Automatic Airflow Rate Control

    Outline of Control (Indoor Unit) SiME332106E Automatic Airflow Rate Control The automatic airflow rate control (Five steps from H to L) is based on the difference between control target temperature and set temperature. Conditions When airflow rate is set Automatic airflow rate Cooling Thermostat ON The fan tap is determined...

  • Page 79: Airflow Direction Control

    SiME332106E Outline of Control (Indoor Unit) Airflow Direction Control 8.4.1 Without Optional Infrared Floor Sensor Refer to the table below for controlling the horizontal flap (or the vertical flap) for airflow direction adjustment. Conditions FXAQ-AR Cooling Direction set Thermostat ON Thermostat OFF Swing set Thermostat ON...

  • Page 80: Auto Draft Reducing Control (Fxfsq-Ar Only)

    Outline of Control (Indoor Unit) SiME332106E Indoor unit Flap position (Horizontal view) Auto Draft Reducing Control (FXFSQ-AR only) In the case where both this control is activated and auto airflow direction control (eco full automatic control) is set, when human presence is detected, the airflow direction is automatically set to horizontal (P0) to reduce discomfort by direct airflow.

  • Page 81: Drain Pump Control

    SiME332106E Outline of Control (Indoor Unit) Drain Pump Control 8.7.1 Normal Operation Float switch Thermostat (running) Error display Drain pump 5 min.  The float switch is ON in normal operation.  When cooling operation starts (thermostat ON), the drain pump turns ON simultaneously. ...
  • Page 82 Outline of Control (Indoor Unit) SiME332106E 8.7.3 If the Float Switch is OFF with the Thermostat OFF in Cooling Operation Float switch Thermostat (running) Error display Drain pump 5 min. 5 sec.  When the float switch turns OFF, the drain pump turns ON simultaneously. ...

  • Page 83: Freeze-Up Prevention Control

    SiME332106E Outline of Control (Indoor Unit) Freeze-Up Prevention Control Freeze-Up Prevention by Off Cycle (Indoor Unit Individual Control) When the temperature detected by liquid pipe temperature thermistor of the indoor heat exchanger drops too low, the unit enters freeze-up prevention control in accordance with the following conditions, and is also set in accordance with the conditions given below.

  • Page 84: Dew Condensation Prevention Control

    Outline of Control (Indoor Unit) SiME332106E Dew Condensation Prevention Control 8.9.1 FXFSQ-AR Models Indoor operation under a certain condition will limit the swing range of the flaps. Position P0 continues for 30 minutes. Dew condensation Dew condensation prevention control OFF prevention control in action Thermostat OFF Refer to the table below for flap action under this control.

  • Page 85: Electronic Expansion Valve Control

    SiME332106E Outline of Control (Indoor Unit) 8.10 Electronic Expansion Valve Control Electronic expansion valves in indoor units have the functions of conducting superheating degree control in cooling operation and subcooling degree control in heating operation. However, if the indoor units receive any control command such as a protection control command or a special control command from the outdoor unit, the units will give a priority to the control command.

  • Page 86: Circulation Airflow (Fxfsq-Ar Only)

    Outline of Control (Indoor Unit) SiME332106E 8.11 Circulation Airflow (FXFSQ-AR only) Unevenness of room temperature and the startup time are improved by repeating 2-direction horizontal blow-off and swing alternately. 8.11.1 Initiation Conditions of Circulation Operation When operation starts (in the startup state) Circulation airflow operation is performed.

  • Page 87: Hot Start Control (In Heating Operation Only)

    SiME332106E Outline of Control (Indoor Unit) 8.11.3 Operational Concept (Designer Panel) Cooling : Factory setting Movement pattern 01: Pattern 1 120 600 120 600 Appearance 02: Pattern 2 Time (seconds) 03: Pattern 3 13 (23)-14 04: Pattern 4 Indicates the horizontal flap is in the position of reducing airflow volume (the flap is inverted). Heating : Factory setting Movement pattern...

  • Page 88: Heater Control (Optional Pcb Krp1B Series Is Required.)

    Outline of Control (Indoor Unit) SiME332106E 8.13 Heater Control (Optional PCB KRP1B series is required.) The heater control is conducted in the following manner. Normal control While in heating operation, the heater control (ON/OFF) is conducted as shown below. Set temperature 2ºC 2ºC Overload control...
  • Page 89 SiME332106E Part 5 Field Settings and Test Operation 1. Field Settings for Indoor Unit..............84 1.1 Field Settings with Remote Controller ............84 1.2 List of Field Settings for Indoor Unit ............90 1.3 Applicable Field Settings ................92 1.4 Details of Field Settings for Indoor Unit..........93 1.5 Operation Control Mode ...............106 2.

  • Page 90: Field Settings For Indoor Unit

    Field Settings for Indoor Unit SiME332106E 1. Field Settings for Indoor Unit Field Settings with Remote Controller Individual function of indoor unit can be changed from the remote controller. At the time of installation or after service inspection / repair, make the field setting in accordance with the following description.
  • Page 91 SiME332106E Field Settings for Indoor Unit Press Menu/Enter button. Setting Setting confirmation screen confirmation screen is displayed. Select Yes and press Menu/Enter button. Setting details are determined and field settings screen returns. In the case of multiple setting changes, repeat (3) to (7). After all setting changes are completed, press Cancel button twice.
  • Page 92 Field Settings for Indoor Unit SiME332106E 1.1.2 BRC1H81 Series (Remote Controller) The controller allows for making field settings related to the indoor unit, and to the controller itself. Field settings Screen Indoor unit ▪ Define a mode by setting a Mode number ▪...
  • Page 93 SiME332106E Field Settings for Indoor Unit 1.1.3 BRC1H81 Series (Smartphone Application) Set as Installer In order to retrieve the field settings, the Madoka Assistance app has to be set as installer Mode mode. If already set as installer mode, skip to Making Field Settings. 1.
  • Page 94 Field Settings for Indoor Unit SiME332106E 7. Select desired “Second Code No.. Multiple identical mode number settings are available. In the case of group total setting, all of Second Code No. which may be set are displayed as "*". "*" is changed to Second Code No. to be set. And, Second Code No. "-" means no function. Note(s) In case of multiple setting changes, repeat steps 4 through 7.
  • Page 95 SiME332106E Field Settings for Indoor Unit 1.1.4 BRC4M Series Mode No. First code Second code No. Setting To set the field settings, you have to change:  Mode No.  First code No.  Second code No. To change the field settings, proceed as follows: 1.

  • Page 96: List Of Field Settings For Indoor Unit

    Field Settings for Indoor Unit SiME332106E List of Field Settings for Indoor Unit : Factory setting Mode First Second Code No. Reference Code Description Page (2) Filter Ultra long life Approx. Approx. cleaning filter 10,000 5,000 sign interval hrs. hrs. Long life filter Approx.
  • Page 97 SiME332106E Field Settings for Indoor Unit Mode First Second Code No. Reference Code Description Page (2) Ceiling height setting, Setting of Refer to the page on the right for details. normal airflow Airflow direction setting 4-way airflow 3-way airflow 2-way airflow —...

  • Page 98: Applicable Field Settings

    Field Settings for Indoor Unit SiME332106E Applicable Field Settings Mode First FXDQ-PD Setting Contents FXFSQ-AR FXMQ-PB FXMQ-AR FXAQ-AR Code No. FXDQ-ND Filter cleaning sign interval      Filter type ―     Remote controller thermistor ...

  • Page 99: Details Of Field Settings For Indoor Unit

    SiME332106E Field Settings for Indoor Unit Details of Field Settings for Indoor Unit 1.4.1 Filter Cleaning Sign Interval, Filter Type When the setting 10 (20)-3 is set to 01 (Displayed), filter cleaning sign is displayed on the remote controller after a certain period of operation time. This setting is used to change the display interval of filter cleaning sign when the filter contamination is heavy.
  • Page 100 Field Settings for Indoor Unit SiME332106E In cooling Suction air Remote controller Suction air thermistor thermistor thermistor Suction air Remote controller Suction air thermistor thermistor thermistor Suction air temperature (°C) In heating Suction air Remote controller Suction air thermistor thermistor thermistor Suction air Remote controller...
  • Page 101 SiME332106E Field Settings for Indoor Unit 1.4.3 Filter Cleaning Sign Whether or not to display the sign after operation of a certain duration can be selected. : Factory setting Mode First Code Second Contents Code No. 01 Displayed 10 (20) Not displayed 1.4.4 Information for intelligent Touch Manager / intelligent Touch Controller...
  • Page 102 Field Settings for Indoor Unit SiME332106E 1.4.6 Dry Operation Time during VRTsmart Control  If you switch the operation mode to "Dry" while VRTsmart is enabled, the mode will automatically switch to "Cooling" after a certain period of time is elapsed. If you want to increase the duration of dry operation, change the Second code No.
  • Page 103 SiME332106E Field Settings for Indoor Unit 1.4.10 Setting the Rate of Human Detection Set the sensitivity of the infrared presence/floor sensor.  The infrared presence/floor sensor can be disabled by selecting the Second code No. 04. When the infrared presence/floor sensor is disabled, the remote controller menu does not display some functions such as the automatic draft reduction, energy-saving operation in absence and halt in absence.
  • Page 104 Field Settings for Indoor Unit SiME332106E 1.4.12 Compensating the Temperature around People Change the ratio between the suction air temperature and floor temperature used to calculate the temperature around people. The temperature around people is calculated using the values of the suction air thermistor and the infrared floor sensor.
  • Page 105 SiME332106E Field Settings for Indoor Unit 1.4.15 External ON/OFF Input This input is used for "ON/OFF operation" and "Protection device input" from the outside. The input is performed from the T1-T2 terminal of the operation terminal block in the electrical component box.
  • Page 106 Field Settings for Indoor Unit SiME332106E 1.4.19 Auto Restart after Power Failure : Factory setting Mode First Second Contents Code No. Code No. 12 (22) 02 ON When the "Auto Restart after Power Failure" setting is turned OFF, all the units will remain OFF after power failure, or after the main power supply is restored.
  • Page 107 SiME332106E Field Settings for Indoor Unit 1.4.22 Ceiling Height Setting, Setting of Normal Airflow Make the following setting according to the ceiling height.  FXFSQ25-80AR : Factory setting Ceiling Height First Second Mode Code Code Contents All round 4-way 3-way 2-way outlet Outlets...
  • Page 108 Field Settings for Indoor Unit SiME332106E 1.4.24 Swing Pattern Settings Set the flap operation in swing mode. With the factory swing, flaps facing each other are synchronized to operate, and flaps placed side by side are set to swing in an opposite direction to agitate airflow to reduce temperature irregularity.
  • Page 109 SiME332106E Field Settings for Indoor Unit 1.4.27 External Static Pressure Settings Make external static pressure setting automatically using automatic airflow adjustment (11 (21)-7), or manually using external static pressure settings (13 (23)-6).  FXMQ-PB : Factory setting Mode No. First Code No. Second Code No.
  • Page 110 Field Settings for Indoor Unit SiME332106E 1.4.30 Circulation Airflow Patterns This setting is to change the appearance pattern of the circulation airflow direction depending on the installation environment of the indoor unit. Cooling : Factory setting Movement pattern 01: Pattern 1 120...
  • Page 111 SiME332106E Field Settings for Indoor Unit 1.4.33 Direct Duct Connection This is used when "fresh air intake kit equipped with fan" is connected by duct directly. The indoor fan carries out residual operation for 1 minute after the thermostat is stopped. (For the purpose of preventing dust on the air filter from falling off.) When the second code No.

  • Page 112: Operation Control Mode

    Field Settings for Indoor Unit SiME332106E 1.4.37 Setting Restricted/Permitted of Airflow Block The airflow block function cannot be enabled when closure material kit, fresh air intake kit, separately installed natural evaporation type humidifier, or branch air duct is equipped, due to the possibility of dew condensation.
  • Page 113 SiME332106E Field Settings for Indoor Unit How to Select Operation Mode Whether operation by remote controller will be possible or not for turning ON/OFF, controlling temperature or setting operation mode is selected and decided by the operation mode given on the right edge of the table below.

  • Page 114: Field Settings For Outdoor Unit

    Field Settings for Outdoor Unit SiME332106E 2. Field Settings for Outdoor Unit This section shows a list of field setting items possible to set at time of initial startup. For details of DIP switch setting, setting mode ("mode 2") and monitor mode ("mode 1"), refer to information on the following pages.

  • Page 115: Settings By Dip Switches

    SiME332106E Field Settings for Outdoor Unit Settings by DIP Switches 2.2.1 DIP Switch Setting when Mounting a Spare PCB Caution:  After replacement with spare PCB, be sure to make settings shown in the table below. The procedure for making settings of spare PCB is different from that used for factory settings described above.
  • Page 116 Field Settings for Outdoor Unit SiME332106E RXYMQ4-6AYFK (3) BS button (BS1~BS3) (2) Segment display (SEG1~SEG3) DIP switch (DS1-1~4) (DS2-1~4) Initial position of DIP switches („) 1 2 3 4 1 2 3 4 Microcomputer normal monitor (HAP) Connection terminal for transmission use (1) Microcomputer normal monitor This monitor blinks while in normal control, and turns ON or OFF when an error occurs.
  • Page 117 SiME332106E Field Settings for Outdoor Unit C: 3P473957 Part 5 Field Settings and Test Operation...

  • Page 118: Settings By Bs Buttons

    Field Settings for Outdoor Unit SiME332106E Settings by BS Buttons The following settings can be made using the BS buttons on the PCB. BS buttons 7 segment display (SEG1-3) SEG1 SEG2 SEG3 MODE RETURN Normal mode (TEST) (RESET) Setting mode Used to make Used to make setting mode...
  • Page 119 SiME332106E Field Settings for Outdoor Unit  Selection between normal mode, monitor mode (Mode 1) and setting mode (Mode 2). SEG1 SEG2 SEG3 Normal mode MODE (BS1) button for more than 5 sec. Press Press MODE (BS1) button once. (Initial condition) Monitor mode (Mode 1) Setting mode (Mode 2) Select setting item with...

  • Page 120: Normal Mode

    Field Settings for Outdoor Unit SiME332106E Normal Mode 1. Indoor/outdoor transmission status: Used to check for the initial status of indoor/outdoor transmission. SEG1 SEG2 SEG3 Blinking Initializing Initializing completed 2. Descriptions: Used to display an error content. SEG1 SEG2 SEG3 Normal Example: E7-01 Error...

  • Page 121: Monitor Mode (Mode 1)

    SiME332106E Field Settings for Outdoor Unit Monitor Mode (Mode 1) In the monitor mode, information can be retrieved about settings related to performance, addresses, number of units and actual operation data. 2.5.1 Retrieve data by using BS button on outdoor unit main PCB SEG1 SEG2 SEG3 Normal To enter monitor mode, press the...
  • Page 122 Field Settings for Outdoor Unit SiME332106E 2.5.2 Overview of Monitor Mode (Mode 1) Item Contents Display Display 1 Description Description Low noise operation state In normal operation display In low noise operation Demand operation state In normal operation display In demand operation Automatic backup operation setting Defrost selection setting...
  • Page 123 SiME332106E Field Settings for Outdoor Unit Item Contents Display Display 1 Description Description Description of retry Refer to information in Error Code via (latest) Outdoor Unit PCB on page 152. Description of retry (1 cycle before) Description of retry (2 cycles before) Number of outdoor units Possible 0-63 connected in a multi...

  • Page 124: Setting Mode (Mode 2)

    Field Settings for Outdoor Unit SiME332106E Setting Mode (Mode 2) 2.6.1 How to Make Settings SEG1 SEG2 SEG3 Press and hold the MODE (BS1) button for 5 seconds or more to enter setting mode. Normal MODE Selection of setting items Press the SET (BS2) button to select any of the setting item listed in the following table.
  • Page 125 SiME332106E Field Settings for Outdoor Unit 2.6.2 Overview of Setting Mode (Mode 2) This overview shows the available settings by using the press buttons on the outdoor unit PCB. Item Contents Display Display Description Description Low noise/ Used to make address setting for low Address: demand address noise/demand address.
  • Page 126 Field Settings for Outdoor Unit SiME332106E Item Contents Display Display Description Description External Low noise level when the external low Level 1 night-time low noise signal is input at option Level 2 noise operation DTA104A61. Level 3 level Automatic Time to start automatic “night-time low About 8:00 PM night-time low noise”...
  • Page 127 SiME332106E Field Settings for Outdoor Unit Item Contents Display Display Description Description VRTsmart Used to change upper limit of target Low 1 control evaporation temperature in VRTsmart Low 2 Te upper limit control. Low 3 Low 4 Low 5 Low 6 Standard High VRTsmart...
  • Page 128 Field Settings for Outdoor Unit SiME332106E 2.6.3 Details of Setting Mode (Mode 2)  Mode 2-2: Low noise/demand address: address for low noise/demand operation.  1 or more systems (maximum 10 systems wired by “F1F2 OUT/D”) can operate use the LNO (Low Noise Operation) or/and the DE (Demand Control) by instruction of field supplied input to optional board DTA104A61/62.
  • Page 129 SiME332106E Field Settings for Outdoor Unit  Mode 2-12: Enable input “DTA104A61/62”: enable the low noise function and/or power consumption limitation. If the system needs to be running under low noise operation or under power consumption limitation conditions when an external signal is sent to the unit, this setting should be changed.
  • Page 130 Field Settings for Outdoor Unit SiME332106E  Mode 2-25: Night-time low noise operation level when using external input to optional board DTA104A61/62.  If the system needs to be running under low noise operation conditions when an external signal is sent to the unit, this setting defines the level of low noise that will be applied. ...
  • Page 131 SiME332106E Field Settings for Outdoor Unit  Wait until the LEDs are OFF before returning fasten terminals back to the compressor terminals.  Minimum requirements to refer to the result on the inverter checker module:  Line (for RXYMQ4AVMK) or all 3 phases (for RXYMQ4-6AYFK) and neutral are available, and ...
  • Page 132 Field Settings for Outdoor Unit SiME332106E RXYMQ4-6AYFK Disconnect U/V/W from compressor before performing the power transistor check. Step 2: Voltage Mode 2-28 Check 2 output Step 1: Set 02 01, then U/V/W Mode 2-28 Frequency: 10 Hz press “Return” twice Set 01 02, then OR press “MODE”...
  • Page 133 SiME332106E Field Settings for Outdoor Unit  Mode 2-30: Power consumption limitation level 1. If the system needs to be running under power consumption limitation conditions via the external control adaptor for outdoor unit DTA104A61/62. This setting defines the level power consumption limitation that will be applied for level 1.
  • Page 134 Field Settings for Outdoor Unit SiME332106E  2: Quick. Undershoot during cooling operation is allowed compared to the requested refrigerant temperature, in order to achieve the required room temperature very fast. The overshoot is allowed from the start up moment. In case of cooling operation the evaporating temperature is allowed to go down to 6°C on temporary base depending on the situation.
  • Page 135 SiME332106E Field Settings for Outdoor Unit  Default value: 1. RA cool/heat master logic. Any RA indoor unit that is switched first, is assigned as cool/heat master as long this unit is in operation (regardless thermostat status). Only when this indoor unit is switched OFF operation (by remote controller), other indoor unit can become cool/heat master: ...

  • Page 136: Eco Mode Setting

    Field Settings for Outdoor Unit SiME332106E Eco Mode Setting By connecting an external contact input in the input of mode configuration and external control adaptor (sold separately), you may control Eco mode setting, limiting compressor operation load and power consumption. When Eco mode is set as unavailable (Outdoor unit external control adaptor is unnecessary) Eco mode control is unavailable during cooling operation.

  • Page 137: Night-Time Low Noise Operation And Demand Operation

    SiME332106E Field Settings for Outdoor Unit Night-Time Low Noise Operation and Demand Operation Night-time Low Noise Operation By connecting the external contact input to the low noise input of the outdoor unit external control adaptor (optional), you can lower operating noise by 2-3 dB. Setting Content Level 1...
  • Page 138 Field Settings for Outdoor Unit SiME332106E Image of operation in the case of A Operation If capacity priority is set in sound Capacity priority setting, the fan speed will be increased according to the load of air conditioning when load is heavier. Operation sound Rated during low noise...
  • Page 139 SiME332106E Field Settings for Outdoor Unit Setting of Demand Operation By connecting the external contact input to the demand input of the external control adaptor for outdoor unit (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition.
  • Page 140 Field Settings for Outdoor Unit SiME332106E Image of operation in the case of A Power consumption Rated The power Demand level 1 Demand level 2 Demand level 3 consumption instructing instructing instructing during the demand level 1 instructing can be set with the Power consumption set by "Demand 1 level...

  • Page 141: Test Operation

    SiME332106E Test Operation 3. Test Operation Checks before Test Operation Before carrying out a test operation, proceed as follows: Step Action Make sure the voltage at the primary side of the safety breaker is: 220-240 V ± 10% for 1-phase units; 380-415 V ±...

  • Page 142: Test Operation Procedure

    Test Operation SiME332106E Test Operation Procedure To start smoothly, a crankcase heater is equipped to the unit. To power up the crankcase heater in advance, be sure to turn on the power supply 6 hours before operation. Warning Be sure to inform other installers or attach the front panel well before leaving with the power supply turned on for the outdoor unit.
  • Page 143 SiME332106E Test Operation About test operation  In order to ensure uniform refrigerant distribution, it may take up to around 10 minutes for the compressor to start up after the unit starting operation. This is not an error.  Meaning of operation check is not to check individual indoor unit. After completing operation check, operate the system normally with the remote controller.

  • Page 144: Turn Power On

    Test Operation SiME332106E Turn Power ON • Be sure to turn the power ON 6 hours before starting operation to protect Turn outdoor unit and indoor compressors. unit power ON. • Check to be sure the transmission is normal. Check the 7 segment display of In a normal condition, the 7-segment display is OFF.
  • Page 145 SiME332106E Part 6 Service Diagnosis 1. Servicing Items to be Confirmed ............142 1.1 Troubleshooting..................142 1.2 Precautions for Maintenance..............142 1.3 Refrigerant Properties (R-410A)............143 2. Symptom-based Troubleshooting ............144 2.1 With Optional Infrared Presence/Floor Sensor........147 2.2 For All Outdoor Units................148 3. Error Code via Remote Controller............149 3.1 BRC1E63 .....................149 3.2 BRC1H81 Series ..................150 3.3 BRC4M Series..................151...
  • Page 146 SiME332106E 5.28 Outdoor Fan Motor Abnormality ............202 5.29 Electronic Expansion Valve Coil Abnormality........205 5.30 Discharge Pipe Temperature Abnormality ...........206 5.31 Wet Alarm.....................208 5.32 Refrigerant Overcharged..............210 5.33 Harness Abnormality (between Outdoor Unit Main PCB and Inverter PCB)..................211 5.34 OL Activation (Compressor Overload) ..........212 5.35 Outdoor Fan PCB Abnormality.............214 5.36 Thermistor Abnormality ................215 5.37 High Pressure Sensor Abnormality ............217...
  • Page 147 SiME332106E 6.7 Vacuuming and Dehydration Procedure ..........280 6.8 Thermistor Check .................281 6.9 Pressure Sensor Check ...............284 6.10 Broken Wire Check of the Relay Wires ..........285 6.11 Fan Motor Connector Check (Power Supply Cable) ......285 6.12 Fan Motor Connector Check (Signal Cable) ........287 6.13 Electronic Expansion Valve Coil Check ..........288 Part 6 Service Diagnosis...

  • Page 148: Servicing Items To Be Confirmed

    Servicing Items to be Confirmed SiME332106E 1. Servicing Items to be Confirmed Troubleshooting 1. Initial verification and troubleshooting (1) Properly understand the end user's needs and issues. (2) Check the cause of errors according to the description provided by the end user. (3) Check if the remote controller displays any error codes.

  • Page 149: Refrigerant Properties (R-410A)

    SiME332106E Servicing Items to be Confirmed minute before entering service mode again. In case of continuous execution, the outdoor unit PCB may sometimes display an error code. If any error codes are displayed, press the RETURN (BS3) button. If performing the above operation still does not eliminate the error, reconnect the unit to the power supply.

  • Page 150: Symptom-Based Troubleshooting

    Symptom-based Troubleshooting SiME332106E 2. Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure The system does not start operation at all. Blowout of fuse(s) Turn Off the power supply and then replace the fuse(s). Cutout of breaker(s) • If the knob of any breaker is in its OFF position, turn ON the power supply.
  • Page 151 SiME332106E Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure COOL/HEAT The remote controller displays This remote controller has no option Use a remote controller with option selection is the mark for centralized to select cooling operation. to select cooling operation. disabled. control. The remote controller displays COOL/HEAT selection is made Use the COOL/HEAT selection...
  • Page 152 Symptom-based Troubleshooting SiME332106E Symptom Supposed Cause Countermeasure Dust comes out Dust comes out from the Dust, which has deposited on the Normal operation. from the system. system when it restarts after inside of indoor unit, is blown out the stop for an extended from the system.

  • Page 153: With Optional Infrared Presence/Floor Sensor

    SiME332106E Symptom-based Troubleshooting With Optional Infrared Presence/Floor Sensor Problem Measure "Louver operation different from setting" or "No downward Refer to the flowchart below. airflow in heating operation" 2 Individual airflow direction setting different from the actual Check the "Louver operation different from setting" error airflow direction diagnosis.

  • Page 154: For All Outdoor Units

    Symptom-based Troubleshooting SiME332106E For All Outdoor Units Problem Measure Decrease of main circuit power supply insulation Define the measure using the flowchart below. resistance (Less than 1 M) Decrease of main circuit power supply insulation resistance Cut the power supply. Remove the compressor wiring from the power supply terminal.

  • Page 155: Error Code Via Remote Controller

    SiME332106E Error Code via Remote Controller 3. Error Code via Remote Controller BRC1E63 The following message is displayed on the screen when an error (or a warning) occurs during operation. Check the error code and take the corrective action specified for the particular model. Screen Operation lamp Menu/Enter button...

  • Page 156: Brc1H81 Series

    Error Code via Remote Controller SiME332106E BRC1H81 Series When the system is in error and the controller presents you with an error screen from as soon as you try to enter the main menu, consult your dealer. Error screen (example) 3.2.1 Refrigerant Leak Detection When the system detects a refrigerant leak, an alarm goes off.

  • Page 157: Brc4M Series

    SiME332106E Error Code via Remote Controller BRC4M Series When the air conditioner stops in emergency, the operating indicator lamp on the indoor unit starts blinking. Take the following steps yourself to read the error code that appears on the display. Contact your local dealer with this code.

  • Page 158: Error Code Via Outdoor Unit Pcb

    Error Code via Outdoor Unit PCB SiME332106E 4. Error Code via Outdoor Unit PCB Error code descriptions are accessible on monitor mode (Mode 1). Refer to page 115 for monitor mode. The error codes for forced stop outdoor or retry are item: ...

  • Page 159: Troubleshooting By Error Code

    SiME332106E Troubleshooting by Error Code 5. Troubleshooting by Error Code Error Codes and Descriptions k: ON h: OFF l: Blink Operation Reference Error code Description lamp page Indoor Unit External protection device abnormality Indoor unit PCB abnormality Drain level control system abnormality Indoor fan motor lock, overload Indoor fan motor abnormality Power supply voltage abnormality...
  • Page 160 Troubleshooting by Error Code SiME332106E Operation Reference Error code Description lamp page Outdoor Unit Outdoor unit main PCB abnormality Current leakage detection Missing of leakage detection core Activation of high pressure switch Activation of low pressure sensor Compressor motor lock Outdoor fan motor abnormality Electronic expansion valve coil abnormality Discharge pipe temperature abnormality...

  • Page 161: Error Codes (Sub Codes)

    SiME332106E Troubleshooting by Error Code Error Codes (Sub Codes) If an error code like the one shown below is displayed when the navigation remote controller (BRC1E series) is in use, make a detailed diagnosis or a diagnosis of the relevant unit referring to the attached list of detailed error codes.
  • Page 162 Troubleshooting by Error Code SiME332106E Troubleshooting Error code Description of error Diagnosis Infrared floor sensor error An abnormality other than the ones mentioned above has been detected. CE - 04 Check if the temperature nearby the sensor is too high, and if there is any foreign matter that may cause noise.
  • Page 163 SiME332106E Troubleshooting by Error Code 5.2.2 Outdoor Unit, System Troubleshooting Error code Description of error Diagnosis E1 - 01 Outdoor unit PCB error Refer to the E1 flowchart and make a diagnosis based on the Error code shown to the left. E1 - 02 Defective outdoor unit PCB E2 - 01...
  • Page 164 Troubleshooting by Error Code SiME332106E Troubleshooting Error code Description of error Diagnosis JA - 06 Defective high pressure sensor: Open Refer to the JA flowchart and make a diagnosis of the sensor based Defective high pressure sensor: Short JA - 07 on the Error code shown to the left.
  • Page 165 SiME332106E Troubleshooting by Error Code Troubleshooting Error code Description of error Diagnosis Error when external control adaptor for outdoor unit is U7 - 01 installed Alarm when external control adaptor for outdoor unit is Refer to the U7 flowchart and make a diagnosis based U7 - 02 installed on the Error code shown to the left.

  • Page 166: External Protection Device Abnormality

    Troubleshooting by Error Code SiME332106E External Protection Device Abnormality Applicable All indoor unit models Models Error Code Method of Error Detects open or short circuit between external input terminals in indoor unit. Detection Error Decision An open circuit occurs between external input terminals with the remote controller set for Conditions external ON/OFF input.

  • Page 167: Indoor Unit Pcb Abnormality

    SiME332106E Troubleshooting by Error Code Indoor Unit PCB Abnormality Applicable All indoor unit models Models Error Code Method of Error Data from EEPROM is checked. Detection Error Decision Data cannot be correctly received from the EEPROM Conditions EEPROM: Type of nonvolatile memory. Maintains memory contents even when the power supply is turned OFF.

  • Page 168: Drain Level Control System Abnormality

    Troubleshooting by Error Code SiME332106E Drain Level Control System Abnormality Applicable FXFSQ-AR, FXDQ-PD, FXDQ-ND, FXMQ-PB, FXMQ-AR Models Error Code Method of Error By float switch OFF detection Detection Error Decision Float switch goes OFF when the conditions for water level rise are not met Conditions Supposed ...
  • Page 169 SiME332106E Troubleshooting by Error Code The drain pump works when the Check the drain piping for power supply is reset for the clogging or upward slope, etc. indoor unit. voltage of drain pump terminals (∗2) is in accordance to the criteria Replace the indoor unit control (∗3) (within 5 minutes of PCB (A1P).

  • Page 170: Indoor Fan Motor Lock, Overload

    Troubleshooting by Error Code SiME332106E Indoor Fan Motor Lock, Overload Applicable FXMQ40PB, FXAQ-AR Models Error Code Method of Error Abnormal fan revolutions are detected by a signal output from the fan motor. Detection Error Decision The fan revolutions do not increase. Conditions Supposed ...
  • Page 171 SiME332106E Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn OFF the power supply, and then wait for a period of 10 minutes. Are there any foreign matter Remove the foreign matter.

  • Page 172: Indoor Fan Motor Abnormality

    Troubleshooting by Error Code SiME332106E Indoor Fan Motor Abnormality 5.7.1 Indoor Fan Motor Abnormality (FXDQ-PD, FXDQ-ND) Applicable FXDQ-PD, FXDQ-ND Models Error Code Method of Error This error is detected if there is no revolution detection signal output from the fan motor. Detection Error Decision When no revolutions can be detected even at the maximum output voltage to the fan...
  • Page 173 SiME332106E Troubleshooting by Error Code 5.7.2 Indoor Fan Motor Abnormality (FXMQ50-140PB) Applicable FXMQ50-140PB Models Error Code Method of Error  Error from the current flow on the fan PCB Detection  Error from the rotation speed of the fan motor in operation ...
  • Page 174 Troubleshooting by Error Code SiME332106E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power and wait for 10 minutes. There is a foreign matter around the Remove the foreign matter.
  • Page 175 SiME332106E Troubleshooting by Error Code The resistance among U, V, and W are unbalanced Replace the indoor fan motor (M1F). or below 1 Ω. CHECK 17 Remove the signal connector from the fan motor and check the resistance. Between and GND terminals, and between GND Replace the indoor fan and H...
  • Page 176 Troubleshooting by Error Code SiME332106E 5.7.3 Indoor Fan Motor Abnormality (FXFSQ-AR) Applicable FXFSQ-AR Models A6-10 Error Code Method of Error  Detection from the current flow on the fan PCB (A1P) Detection  Detection from the rotation speed of the fan motor in operation ...
  • Page 177 SiME332106E Troubleshooting by Error Code The HAP lamp on the indoor unit Replace the indoor unit control control PCB is PCB (A1P). blinking. Replace the fan motor (M1F). 1 Check also if the relay connector between the indoor unit control PCB and the fan motor are correctly connected.

  • Page 178: Power Supply Voltage Abnormality

    Troubleshooting by Error Code SiME332106E Power Supply Voltage Abnormality 5.8.1 Power Supply Voltage Abnormality (FXMQ-PB) Applicable FXMQ-PB Models Error Code Method of Error Error is detected by checking the input voltage of the fan motor. Detection Error Decision When the input voltage of fan motor is 150 V or less, or 386 V or more. Conditions Supposed ...
  • Page 179 SiME332106E Troubleshooting by Error Code 5.8.2 Power Supply Voltage Abnormality (FXFSQ-AR) Applicable FXFSQ-AR Models A8-01 Error Code Method of Error This error is detected by checking the voltage status with the microcomputer. Detection Error Decision Overvoltage or voltage drop is detected on the fan driver. Conditions Supposed ...
  • Page 180 Troubleshooting by Error Code SiME332106E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the condition of the power supply. Check if power supply voltage is 220-240 V±10%. There are problems Correct any fault.

  • Page 181: Electronic Expansion Valve Coil Abnormality, Dust Clogging

    SiME332106E Troubleshooting by Error Code Electronic Expansion Valve Coil Abnormality, Dust Clogging Applicable All indoor unit models Models A9, A9-02 Error Code Method of Error Electronic expansion valve coil conditions are checked via microcomputer. Detection The electronic expansion valve main body is checked for dust clogging via microcomputer. Error Decision Pin input for electronic expansion valve coil is abnormal when initializing microcomputer.

  • Page 182: Humidifier System Abnormality

    Troubleshooting by Error Code SiME332106E 5.10 Humidifier System Abnormality Applicable FXFSQ-AR, FXDQ-PD, FXDQ-ND, FXMQ-PB, FXMQ-AR Models Error Code Method of Error Water leakage from the humidifier system is detected based on float switch ON/OFF operation Detection while the compressor is not in operation. Error Decision The float switch changes from ON to OFF while the compressor is not in operation.

  • Page 183: Auto Grille Unit Error

    SiME332106E Troubleshooting by Error Code 5.11 Auto Grille Unit Error Applicable FXFSQ-AR (when auto grille panel BYCQ125EBSF is installed) Models AH-12 Error Code Method of Error This error is determined when an abnormal signal from the auto grille kit is detected. Detection Error Decision Any of the following conditions is established while the grille is elevating.

  • Page 184: Defective Capacity Setting

    Troubleshooting by Error Code SiME332106E 5.12 Defective Capacity Setting Applicable All indoor unit models Models Error Code Method of Error Capacity is determined according to resistance of the capacity setting adaptor and the memory Detection inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is determined.

  • Page 185: Transmission Abnormality (Between Indoor Unit Pcb And Fan Pcb)

    SiME332106E Troubleshooting by Error Code 5.13 Transmission Abnormality (between Indoor Unit PCB and Fan PCB) Applicable FXMQ-PB Models Error Code Method of Error Transmission conditions between the indoor unit control PCB (A1P) and fan PCB (A2P) are Detection checked via microcomputer. Error Decision When normal transmission is not carried out for a certain duration.
  • Page 186 Troubleshooting by Error Code SiME332106E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the connector between indoor unit PCB (A1P) and fan Connect the connector accurately. PCB (A2P) accurately connected? (∗1) Confirm the condition of transmission on indoor unit...

  • Page 187: Transmission Error

    SiME332106E Troubleshooting by Error Code 5.14 Transmission Error Applicable FXFSQ-AR Models C1-01 Error Code Method of Error Check the condition of transmission using microcomputer. Detection Error Decision Error is decided when transmission has been lost for 15 seconds and the error code is Conditions displayed on the remote controller 60 seconds later.

  • Page 188: Transmission Error (Between Indoor Unit Pcb And Auto Grille Control Pcb)

    Troubleshooting by Error Code SiME332106E 5.15 Transmission Error (between Indoor Unit PCB and Auto Grille Control PCB) Applicable FXFSQ-AR (when auto grille panel BYCQ125EBSF is installed) Models C1-06 Error Code Method of Error The status of communication between the indoor unit PCB (X70A) and the auto grille control Detection PCB (X12A) is checked with the microcomputer.
  • Page 189 SiME332106E Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the X70A connector on the indoor Properly connect the connector. unit PCB properly connected? Is the X12A connector on the auto grille Properly connect the connector.

  • Page 190: Thermistor Abnormality

    Troubleshooting by Error Code SiME332106E 5.16 Thermistor Abnormality Applicable All indoor unit models Models C4, C5, C9 Error Code Method of Error The error is determined by the temperature detected by the thermistor. Detection Error Decision The thermistor becomes disconnected or shorted while the unit is running. Conditions Supposed ...

  • Page 191: Combination Abnormality (Between Indoor Unit Pcb And Fan Pcb)

    SiME332106E Troubleshooting by Error Code 5.17 Combination Abnormality (between Indoor Unit PCB and Fan PCB) Applicable FXMQ-PB Models Error Code Method of Error Transmission conditions with the fan PCB (A2P) are checked using the indoor unit PCB (A1P). Detection Error Decision Fan PCB (A2P) communication data is determined to be incorrect.

  • Page 192: Capacity Setting Abnormality

    Troubleshooting by Error Code SiME332106E 5.18 Capacity Setting Abnormality Applicable FXFSQ-AR Models C6-01 Error Code Method of Error This error is detected by checking communication between the PCB (A1P) and the fan Detection microcomputer. Error Decision Based on the communication data, decide whether the combination of capacity setting and the Conditions type of fan driver is correct.

  • Page 193: Indoor Unit Pcb Abnormality

    SiME332106E Troubleshooting by Error Code 5.19 Indoor Unit PCB Abnormality Applicable FXFSQ-AR Models C6-05 Error Code Method of Error This error is detected by checking the current sensor value. Detection Error Decision When an abnormal signal is detected at the start of operation of the fan motor. Conditions Supposed ...

  • Page 194: Infrared Presence/Floor Sensor Error

    Troubleshooting by Error Code SiME332106E 5.20 Infrared Presence/Floor Sensor Error Applicable FXFSQ-AR Models Error Code Method of Error The contents of a failure vary with the detailed error code. Check the code and proceed with the Detection flowchart. Error Decision Error is detected based on sensor output signals Conditions Supposed...
  • Page 195 SiME332106E Troubleshooting by Error Code Troubleshooting Diagnosis procedure 1 Infrared presence sensor error (Error code CE-01) Is the connection of the connector on infrared presence Connect the connector correctly. sensor PCB (A3P) and the connector X81A on A1P normal? Is the connection of the Connect the connector correctly.
  • Page 196 Troubleshooting by Error Code SiME332106E Troubleshooting Diagnosis procedure 2 Infrared floor sensor error (Error code CE-02) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB (A2P) and the connector X81A on A1P normal? Is the connection of the Connect the connector correctly.
  • Page 197 SiME332106E Troubleshooting by Error Code Troubleshooting Diagnosis procedure 3 Infrared floor sensor error (Error code CE-03) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB (A2P) and the connector X81A on A1P normal? Is the connection of the Connect the connector correctly.
  • Page 198 Troubleshooting by Error Code SiME332106E Troubleshooting Diagnosis procedure 4 Infrared floor sensor error (Error code CE-04) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB (A2P) and the connector X81A on A1P normal? Is the connection of the Connect the connector correctly.

  • Page 199: Remote Controller Thermistor Abnormality

    SiME332106E Troubleshooting by Error Code 5.21 Remote Controller Thermistor Abnormality Applicable All indoor unit models Models Error Code Method of Error Error detection is carried out by the temperature detected by the remote controller thermistor. Detection Error Decision When the remote controller thermistor becomes disconnected or shorted while the unit is Conditions running.

  • Page 200: Outdoor Unit Main Pcb Abnormality

    Troubleshooting by Error Code SiME332106E 5.22 Outdoor Unit Main PCB Abnormality Applicable All outdoor unit models Models Error Code Method of Error Abnormality is detected under the communication conditions in the hardware section between Detection the indoor unit and outdoor unit. Error Decision When the communication conditions in the hardware section between the indoor unit and the Conditions...

  • Page 201: Current Leakage Detection

    SiME332106E Troubleshooting by Error Code 5.23 Current Leakage Detection Applicable RXYMQ4-6AYFK Models Error Code Sub code: 01 Method of Error Current leakage is detected in the earth leakage detection circuit. Error is detected on the Detection outdoor unit main PCB. Error Decision When leakage current is detected.

  • Page 202: Missing Of Leakage Detection Core

    Troubleshooting by Error Code SiME332106E 5.24 Missing of Leakage Detection Core Applicable RXYMQ4-6AYFK Models Error Code Sub code: 06 Method of Error Detect error according to whether or not there is continuity across the connector (X101A). Detection Error Decision When no current flows at the time of turning ON the power supply. Conditions Supposed ...

  • Page 203: Activation Of High Pressure Switch

    SiME332106E Troubleshooting by Error Code 5.25 Activation of High Pressure Switch Applicable All outdoor unit models Models Error Code Method of Error Detect continuity across the high pressure switch in the protection device circuit. Detection Error Decision When part of the protection device circuit opens. Conditions (Reference) Operating pressure of the high pressure switch: ...
  • Page 204 Troubleshooting by Error Code SiME332106E CHECK 12 Service Checker Connect the service checker, and then compare the high pressure value measured by the service checker with the voltage measurement of the connector of the pressure sensor ( 1) Are both pressure values the Replace the outdoor unit same? main PCB (A1P).

  • Page 205: Activation Of Low Pressure Sensor

    SiME332106E Troubleshooting by Error Code 5.26 Activation of Low Pressure Sensor Applicable All outdoor unit models Models Error Code Method of Error Make judgment of pressure detected by the low pressure sensor with the outdoor unit main Detection PCB. Error Decision When low pressure caused a drop while the compressor is in operation: Conditions ...

  • Page 206: Compressor Motor Lock

    Troubleshooting by Error Code SiME332106E 5.27 Compressor Motor Lock Applicable All outdoor unit models Models Error Code Method of Error Outdoor unit main PCB takes the position signal from UVW line connected between the inverter Detection and compressor, and the error is detected when any abnormality is observed in the phase-current waveform.
  • Page 207 SiME332106E Troubleshooting by Error Code The insulation resistance of the Replace the compressor (M1C). compressor is low (< 100 k:) Power OFF internal wiring of the compressor coil is defective. Restart the compressor, and then Quit work. check for the operation. Pressure equalization failure Does the error may have occurred.

  • Page 208: Outdoor Fan Motor Abnormality

    Troubleshooting by Error Code SiME332106E 5.28 Outdoor Fan Motor Abnormality Applicable All outdoor unit models Models Error Code Method of Error  Detect according to the value of current flowing through the PCB. Detection  Detect error of the fan motor system according to the fan revolutions detected by the Hall IC during the fan motor runs.
  • Page 209 SiME332106E Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn OFF the power supply, and then wait for a period of 10 minutes. There is foreign matter around the Remove the foreign matter.
  • Page 210 Troubleshooting by Error Code SiME332106E RXYMQ4AVMK CHECK 16 Check for the connector (power supply cable) of the fan motor. Resistance between U, V, W phases of the fan motor power supply cable has lost Replace the fan motor (M1F). balance or short circuit is caused between U, V, W phases.

  • Page 211: Electronic Expansion Valve Coil Abnormality

    SiME332106E Troubleshooting by Error Code 5.29 Electronic Expansion Valve Coil Abnormality Applicable All outdoor unit models Models Error Code Method of Error Detect according to whether or not there is continuity across the electronic expansion valve Detection coils (Y1E, Y2E, Y3E, Y4E). Error Decision When no current flows through common (COM+) at the time of turning ON the power supply.

  • Page 212: Discharge Pipe Temperature Abnormality

    Troubleshooting by Error Code SiME332106E 5.30 Discharge Pipe Temperature Abnormality Applicable All outdoor unit models Models Error Code Method of Error Detect according to temperature detected with the discharge pipe or compressor body Detection thermistor. Error Decision  When discharge pipe temperature becomes abnormally high (i.e., 135°C or more) Conditions ...
  • Page 213 SiME332106E Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the stop valve open? Open the stop valve. Connect the Service Checker. Reset the system operation, and then restart it.

  • Page 214: Wet Alarm

    Troubleshooting by Error Code SiME332106E 5.31 Wet Alarm Applicable All outdoor unit models Models Error Code Method of Error In cooling operation, detect the condition under which liquid refrigerant returns to the Detection compressor, according to the temperature and pressure of each part. Error Decision When the following wet state continues for a period of 180 minutes, an alert is issued.
  • Page 215 SiME332106E Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Connect the Service Checker. Mount a pressure gauge on the high pressure service port. Reset the operation, and then restart the operation.

  • Page 216: Refrigerant Overcharged

    Troubleshooting by Error Code SiME332106E 5.32 Refrigerant Overcharged Applicable All outdoor unit models Models Error Code Method of Error Detect overcharged refrigerant according to outdoor air temperature, heat exchanger liquid pipe Detection temperature, and subcooling liquid pipe temperature during test operation. Error Decision When the amount of refrigerant, which is calculated using outdoor air temperature, heat Conditions...

  • Page 217: Harness Abnormality (Between Outdoor Unit Main Pcb And Inverter Pcb)

    SiME332106E Troubleshooting by Error Code 5.33 Harness Abnormality (between Outdoor Unit Main PCB and Inverter PCB) Applicable RXYMQ4-6AYFK Models Error Code Method of Error Check for the transmission conditions of the harnesses between the PCBs (X28A (A1P) and Detection X6A (A3P)), and relay connector, if any, using microcomputer. Error Decision When normal transmission between PCBs is disabled during the compressor stops running.

  • Page 218: Ol Activation (Compressor Overload)

    Troubleshooting by Error Code SiME332106E 5.34 OL Activation (Compressor Overload) Applicable All outdoor unit models Models Error Code Method of Error A compressor overload is detected through compressor OL. Detection Error Decision  If the error occurs, the system is shut down. Conditions ...
  • Page 219 SiME332106E Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Discharge pipe Insert the thermistor in thermistor disconnected? position. CHECK 11 Check the discharge pipe Replace the discharge pipe thermistor.

  • Page 220: Outdoor Fan Pcb Abnormality

    Troubleshooting by Error Code SiME332106E 5.35 Outdoor Fan PCB Abnormality Applicable RXYMQ4-6AYFK Models H7-21 Error Code Method of Error Detect according to values detected with current sensor. Detection Error Decision When the current sensor is abnormal. Conditions Supposed  Disconnection/Short circuit in fan motor leads or disconnection of connector ...

  • Page 221: Thermistor Abnormality

    SiME332106E Troubleshooting by Error Code 5.36 Thermistor Abnormality Applicable All outdoor unit models Models H9, J3, J5, J6, J7, J8, J9 Error Code Method of Error Detect according to temperature detected with individual thermistors. Detection Error Decision When the system is in operation and the thermistor causes wiring disconnection or short circuit Conditions in it.
  • Page 222 Troubleshooting by Error Code SiME332106E Note(s) 1. Error codes and thermistors RXYMQ-A Error Applicable Thermistor Code Electric symbol Connector Outdoor air thermistor X18A Discharge pipe thermistor R21T X19A Suction pipe thermistor Heat exchanger deicer thermistor X30A (Group Subcooling heat exchanger liquid pipe thermistor connector) Heat exchanger liquid pipe thermistor Subcooling heat exchanger gas pipe thermistor...

  • Page 223: High Pressure Sensor Abnormality

    SiME332106E Troubleshooting by Error Code 5.37 High Pressure Sensor Abnormality Applicable All outdoor unit models Models Error Code Method of Error Detect according to temperature detected with the high pressure sensor. Detection Error Decision The high pressure sensor is short circuit or open circuit. Conditions (Pressure range: 0-4.3 MPa) Supposed...

  • Page 224: Low Pressure Sensor Abnormality

    Troubleshooting by Error Code SiME332106E 5.38 Low Pressure Sensor Abnormality Applicable All outdoor unit models Models Error Code Method of Error Detect according to temperature detected with the low pressure sensor. Detection Error Decision The low pressure sensor is short circuit or open circuit. Conditions (Pressure range: 0-1.7 MPa) Supposed...

  • Page 225: Inverter Circuit Abnormality

    SiME332106E Troubleshooting by Error Code 5.39 Inverter Circuit Abnormality Applicable All outdoor unit models Models Error Code Method of Error Error is detected based on the current value during waveform output before starting Detection compressor. Error is detected based on the value from current sensor during synchronous operation when starting the unit.
  • Page 226 Troubleshooting by Error Code SiME332106E Troubleshooting RXYMQ4AVMK Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power. Then, turn on the power again. Does the power It is supposed that the error results supply normally come from external causes other than back on?

  • Page 227: Momentary Power Failure During Test Operation

    SiME332106E Troubleshooting by Error Code 5.40 Momentary Power Failure during Test Operation Applicable RXYMQ4-6AYFK Models Error Code Method of Error Momentary power failure is detected by the PCB. Detection Error Decision Judgment is made by AC power frequency detection circuit on the outdoor unit main PCB Conditions Supposed ...

  • Page 228: Inverter Radiation Fin Temperature Rise Abnormality

    Troubleshooting by Error Code SiME332106E 5.41 Inverter Radiation Fin Temperature Rise Abnormality Applicable All outdoor unit models Models Error Code Method of Error Detect temperature of power module of the inverter circuit. Detection Error Decision Thermistor located inside the power module of the inverter circuit for compressor and fan motor. Conditions Cooling tube plate poor heat-exchange.
  • Page 229 SiME332106E Troubleshooting by Error Code  Subcode L4-06 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the cooling conditions of the inverter heat sink. (1) Is the heat sink properly fixed with screws? (2) Error code U0 is displayed on the Error History...

  • Page 230: Compressor Instantaneous Overcurrent

    Troubleshooting by Error Code SiME332106E 5.42 Compressor Instantaneous Overcurrent Applicable All outdoor unit models Models Error Code Method of Error Detect current flowing through the power transistor. Detection Error Decision The current instantaneously exceeds A (A) in the power transistor. Conditions Trigger point Compressor model...
  • Page 231 SiME332106E Troubleshooting by Error Code Power OFF insulation resistance of the Replace the compressor compressor is 100 k: or less. (M1C). The internal wiring of the Replace the compressor compressor coil is (M1C). defective. CHECK 4 Is the power Replace the relevant transistor normal? PCB ( 1 ).

  • Page 232: Compressor Overcurrent

    Troubleshooting by Error Code SiME332106E 5.43 Compressor Overcurrent Applicable All outdoor unit models Models Error Code Method of Error Detect current flowing through the power transistor. Detection Error Decision (1) The secondary-side inverter current exceeds A (A) for a period of 5 consecutive seconds. Conditions (2) The secondary-side inverter current exceeds B (A) for a period of 260 consecutive seconds.
  • Page 233 SiME332106E Troubleshooting by Error Code Power OFF insulation resistance of the Replace the compressor compressor is 100 k: or (M1C). less to ground. The internal wiring of the Replace the compressor compressor coil is (M1C). defective. CHECK 4 Is the power Replace the relevant transistor normal? PCB ( 1) .

  • Page 234: Compressor Startup Abnormality

    Troubleshooting by Error Code SiME332106E 5.44 Compressor Startup Abnormality Applicable All outdoor unit models Models Error Code Method of Error Detect error according to the signal waveform of compressor. Detection Error Decision When compressor startup operation has not been completed. Conditions Supposed ...
  • Page 235 SiME332106E Troubleshooting by Error Code From the previous page (Startup failure in aging operation) Refrigerant is stagnated. (The unit is out of power Solve the refrigerant stagnation. supply for more than (Power should be supplied for more 6 hours.) than 6 hours.) Is the insulation resistance of the...

  • Page 236: Transmission Error Between Microcomputers On Outdoor Unit Main Pcb

    Troubleshooting by Error Code SiME332106E 5.45 Transmission Error between Microcomputers on Outdoor Unit Main PCB Applicable RXYMQ4AVMK Models Error Code Method of Error Check for the transmission conditions between microcomputers on the outdoor unit main PCB Detection using a microcomputer. Error Decision Normal transmission is disabled for a given period of time or more.

  • Page 237: Transmission Error Between Inverter Pcb And Outdoor Unit Main Pcb

    SiME332106E Troubleshooting by Error Code 5.46 Transmission Error between Inverter PCB and Outdoor Unit Main PCB Applicable RXYMQ4-6AYFK Models Error Code Method of Error Check for the transmission conditions between the inverter PCB and the outdoor unit main PCB Detection using a microcomputer.
  • Page 238 Troubleshooting by Error Code SiME332106E The service monitor (green) on the This is not the LC error. outdoor unit main PCB (A1P) is Recheck the error code. blinking. The service The fuse of the monitor (green) on the Replace the inverter PCB (A3P). noise filter PCB has blown inverter PCB (A3P) is out.

  • Page 239: Inverter Circuit Capacitor High Voltage

    SiME332106E Troubleshooting by Error Code 5.47 Inverter Circuit Capacitor High Voltage Applicable RXYMQ4AVMK Models Error Code Method of Error The voltage waveform of the main circuit capacitor of the inverter is used to check for errors. Detection Error Decision The voltage waveform fluctuates greatly. Conditions Supposed ...

  • Page 240: Power Supply Voltage Imbalance

    Troubleshooting by Error Code SiME332106E 5.48 Power Supply Voltage Imbalance Applicable RXYMQ4-6AYFK Models Error Code Method of Error Detect voltage imbalance through inverter PCB. Detection Error Decision Power supply voltage imbalance exceeds approximately 12 V. Conditions Error is not decided while the unit operation is continued. P1 will be displayed by pressing the inspection button.
  • Page 241 Use the document “Notice of Inspection Results” attached to spare part. Explanation to users Be sure to explain user that “power supply Hand the “Notice of Inspection Results” to user to ask voltage imbalance” will occur and Daikin him/her to rectify the imbalance. accepts no responsibility for the imbalance. Note(s) 1.

  • Page 242: Reactor Temperature Abnormality

    Troubleshooting by Error Code SiME332106E 5.49 Reactor Temperature Abnormality Applicable RXYMQ4-6AYFK Models Error Code Method of Error Detect according to the value detected with the reactor surface thermistor. Detection Error Decision When the system is in operation and the thermistor causes wiring disconnection or short circuit Conditions in it.

  • Page 243: Inverter Radiation Fin Temperature Abnormality

    SiME332106E Troubleshooting by Error Code 5.50 Inverter Radiation Fin Temperature Abnormality Applicable All outdoor unit models Models Error Code Method of Error Detect the resistance of the following thermistors during the compressor stops running: Detection (1) Radiation fin thermistor (2) Thermistor located in PCB circuit Error Decision When the resistance of the thermistor comes to a value equivalent to open or short circuit.
  • Page 244 Troubleshooting by Error Code SiME332106E Troubleshooting  Subcode P4-01 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Make measurement of resistance of the radiation fin thermistor. CHECK 11 Is the resistance of the Replace the relevant PCB ( 1 ).

  • Page 245: Field Setting After Replacing Outdoor Unit Main Pcb Abnormality Or Combination Of Pcb Abnormality

    SiME332106E Troubleshooting by Error Code 5.51 Field Setting after Replacing Outdoor Unit Main PCB Abnormality or Combination of PCB Abnormality Applicable All outdoor unit models Models Error Code Method of Error This error is detected according to communications with the outdoor unit main PCB Detection (RXYMQ4AVMK) or inverter PCB (RXYMQ4-6AYFK).

  • Page 246: Refrigerant Shortage Warning (Cooling)

    Troubleshooting by Error Code SiME332106E 5.52 Refrigerant Shortage Warning (Cooling) Applicable RXYMQ4-6AYFK Models Error Code Sub code: 05 Method of Error Detects refrigerant shortage according to the ending conditions of cooling oil return control. Detection Error Decision Cooling oil return control does not finish according to the ending conditions, and the time is Conditions up for 3 consecutive times.

  • Page 247: Refrigerant Shortage Warning (Heating)

    SiME332106E Troubleshooting by Error Code 5.53 Refrigerant Shortage Warning (Heating) Applicable RXYMQ4-6AYFK Models Error Code Sub code: 06 Method of Error Detects refrigerant shortage according to the difference between low pressure equivalent Detection saturation temperature and suction pipe temperature, opening degree of main electronic expansion valve, or superheating operation.
  • Page 248 Troubleshooting by Error Code SiME332106E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Are the characteristics of the Replace the thermistor suction pipe thermistor normal? (R3T). Are the characteristics of the Replace the low pressure low pressure sensor...

  • Page 249: Refrigerant Shortage Abnormality (Heating Only)

    SiME332106E Troubleshooting by Error Code 5.54 Refrigerant Shortage Abnormality (Heating Only) Applicable All outdoor unit models Models Error Code Sub code: -08 Method of Error Detects refrigerant shortage according to the difference between low pressure equivalent Detection saturation temperature and suction pipe temperature, opening degree of main electronic expansion valve or indoor unit electronic expansion valve, inverter fin temperature, or outdoor air temperature, etc.
  • Page 250 Troubleshooting by Error Code SiME332106E Are the characteristics of the inverter fin temperature thermistor normal? Replace the relevant PCB ( 1 ). (Refer to L4 troubleshooting.) CHECK 12 Are the characteristics Replace the low pressure of the low pressure sensor (S1NPL). sensor normal? CHECK 12 Are the characteristics...
  • Page 251 SiME332106E Troubleshooting by Error Code Reference CHECK 3 Refer to page 273. Reference CHECK 7 Refer to page 279. Reference CHECK 11 Refer to page 281. Reference CHECK 12 Refer to page 284. Reference CHECK 18 Refer to page 288. Part 6 Service Diagnosis...

  • Page 252: Open Phase

    Troubleshooting by Error Code SiME332106E 5.55 Open Phase Applicable RXYMQ4-6AYFK Models Error Code Method of Error The phase of each phase is detected by phase detection circuit and open phase is judged. Detection Error Decision When any phase is open phase. Conditions Supposed ...

  • Page 253: Power Supply Insufficient Or Instantaneous Abnormality

    SiME332106E Troubleshooting by Error Code 5.56 Power Supply Insufficient or Instantaneous Abnormality Applicable All outdoor unit models Models Error Code Method of Error Detect the voltage of capacitor of the main circuit in the outdoor unit main PCB. Detection Error Decision When the voltage in the DC circuit (between diode module and power module) falls below Conditions 220-240 VDC (RXYMQ4AVMK) or 380 VDC (RXYMQ4-6AYFK).
  • Page 254 Troubleshooting by Error Code SiME332106E The insulation resistance of the fan Replace the fan motor. motor is less If the motor gets severely than 1 M:. damaged, the outdoor unit main PCB (A1P) should also be replaced. CHECK 4 Is the power Replace the outdoor unit transistor normal? main PCB (A1P).
  • Page 255 SiME332106E Troubleshooting by Error Code RXYMQ4-6AYFK Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check for power supply conditions. (1) Power supply voltage falls within the range of 380 to 415 V? (2) Any open phase in the power supply wiring or any...
  • Page 256 Troubleshooting by Error Code SiME332106E Turn ON the power supply, and then press the ON button. system enters standby mode before the Replace the inverter PCB outdoor unit fan starts (A3P). rotating. The system enters standby mode before completing Replace the inverter PCB the startup operation of the (A3P).

  • Page 257: Check Operation Not Executed

    SiME332106E Troubleshooting by Error Code 5.57 Check Operation Not Executed Applicable All outdoor unit models Models Error Code Method of Error The check operation has not been executed. Detection Error Decision Error is decided when the unit starts operation without check operation. Conditions Supposed ...

  • Page 258: Transmission Error Between Indoor Units And Outdoor Units

    Troubleshooting by Error Code SiME332106E 5.58 Transmission Error between Indoor Units and Outdoor Units Applicable All indoor unit models All outdoor unit models Models Error Code Method of Error Microcomputer checks if transmission between indoor and outdoor units is normal. Detection Error Decision Transmission is not carried out normally for a certain amount of time.
  • Page 259 SiME332106E Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check for details of error in monitor mode. U4-01 Go to the next page. U4-03 (Indoor unit system transmission error) Has the...
  • Page 260 Troubleshooting by Error Code SiME332106E U4-03 Indication after launch test Check controller indoor units: operation? (1) Some error about thermistor, or fan motor, electronic expansion valve, or defective PCB. (2) Test operation was interrupted by the MODE Operate all indoor units. (BS1) button.

  • Page 261: Transmission Error Between Remote Controller And Indoor Unit

    SiME332106E Troubleshooting by Error Code 5.59 Transmission Error between Remote Controller and Indoor Unit Applicable All indoor unit models Models Error code Method of Error Microcomputer checks if transmission between indoor unit and remote controller is normal. Detection Error Decision When transmission is not carried out normally for a certain amount of time.

  • Page 262: Transmission Error Between Outdoor Units

    Troubleshooting by Error Code SiME332106E 5.60 Transmission Error between Outdoor Units Applicable All outdoor unit models Models Error Code Method of Error Microcomputer checks if transmission between outdoor units is normal. Detection Error Decision Transmission is not carried out normally for a certain amount of time Conditions Supposed ...
  • Page 263 SiME332106E Troubleshooting by Error Code Diagnosis Flowchart-1 U7-01 Error code Sub code (Transmission error when the external control adaptor is mounted) there any wiring disconnection or wiring error in the transmission Modify the transmission wirings wirings to the external to the external control adaptor for control adaptor for outdoor unit.
  • Page 264 Troubleshooting by Error Code SiME332106E Diagnosis Flowchart-2 U7-02 Error code Sub code (Transmission error when the external control adaptor for outdoor unit is mounted) Unified Cool/ Heat Set Cool/Heat selection selection for the external control adaptor for outdoor unit to “IND.” Cool/Heat selection for the external control adaptor...
  • Page 265 SiME332106E Troubleshooting by Error Code Diagnosis Flowchart-11 U7-11 Error code Sub code (Connection of excess indoor units for test operation) There is an error in the connection of indoor-outdoor, indoor-indoor, Rectify the error in the connection and outdoor multi of transmission wirings, and then transmission reset the power supply.

  • Page 266: Transmission Error Between Main And Sub Remote Controllers

    Troubleshooting by Error Code SiME332106E 5.61 Transmission Error between Main and Sub Remote Controllers Applicable All indoor unit models Models Error code Method of Error In case of controlling with 2 remote controllers, check the system using microcomputer if signal Detection transmission between indoor unit and remote controller (main and sub remote controller) is normal.

  • Page 267: Other Indoor Units And Outdoor Unit Abnormality

    SiME332106E Troubleshooting by Error Code 5.62 Other Indoor Units and Outdoor Unit Abnormality Applicable All indoor unit models Models All outdoor unit models Error Code Method of Error Detect the error signal for the other indoor unit within the circuit by outdoor unit main PCB. Detection Error Decision The error decision is made on any other indoor units within the system concerned.

  • Page 268: Improper Combination Of Indoor Unit And Outdoor Unit, Indoor Unit And Remote Controller

    Troubleshooting by Error Code SiME332106E 5.63 Improper Combination of Indoor Unit and Outdoor Unit, Indoor Unit and Remote Controller Applicable All indoor unit models All outdoor unit models Models Error Code Method of Error A difference occurs in data by the type of refrigerant between indoor and outdoor units. Detection The number of indoor units connected is out of the allowable range.
  • Page 269 SiME332106E Troubleshooting by Error Code Diagnosis Flowchart-1 UA-17 Error code Sub code The number of indoor units connected to the same Replace the outdoor unit main system is less than 64. PCB (A1P). Excess indoor units are connected. Check for the connection to Diagnosis Flowchart-2 connect the proper number of UA-18...
  • Page 270 Troubleshooting by Error Code SiME332106E Diagnosis Flowchart-4 UA-21 Error code Sub code Replace the outdoor unit main PCB (A1P). Part 6 Service Diagnosis...

  • Page 271: Address Duplication Of Centralized Controller

    SiME332106E Troubleshooting by Error Code 5.64 Address Duplication of Centralized Controller Applicable All indoor unit models Models Centralized controller Error Code Method of Error The principal indoor unit detects the same address as that of its own on any other indoor unit. Detection Error Decision The error decision is made as soon as the abnormality aforementioned is detected.

  • Page 272: Transmission Error Between Centralized Controller And Indoor Unit

    Troubleshooting by Error Code SiME332106E 5.65 Transmission Error between Centralized Controller and Indoor Unit Applicable All indoor unit models Schedule timer Models Central remote controller Error Code Method of Error Microcomputer checks if transmission between indoor unit and centralized controller is normal. Detection Error Decision Transmission is not carried out normally for a certain amount of time...
  • Page 273 SiME332106E Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the indoor unit for which UE is displayed. Is the transmission error UE caused on all indoor units? Is the...
  • Page 274 Troubleshooting by Error Code SiME332106E Check the transmission wiring between centralized controller for Correct the wiring. any broken wire. CHECK 15 Check the transmission wiring between main centralized controller for Correct the wiring. any broken wire. CHECK 15 Has the main centralized controller setting Correct the connection of the connector been...

  • Page 275: System Not Set Yet

    SiME332106E Troubleshooting by Error Code 5.66 System Not Set Yet Applicable All indoor unit models Models All outdoor unit models Error Code Method of Error On check operation, the number of indoor units in terms of transmission is not corresponding to Detection that of indoor units that have made changes in temperature.

  • Page 276: System Abnormality, Refrigerant System Address Undefined

    Troubleshooting by Error Code SiME332106E 5.67 System Abnormality, Refrigerant System Address Undefined Applicable All indoor unit models All outdoor unit models Models Error Code Method of Error Detect an indoor unit with no auto address setting. Detection Error Decision The error decision is made as soon as the abnormality aforementioned is detected. Conditions Supposed ...

  • Page 277: Check

    SiME332106E Check 6. Check High Pressure Check CHECK 1 Referring to the Fault Tree Analysis (FTA) shown below, probe the defective points. mCheck to be sure the stop valve is open. Stop valve closed Local High pipe mConduct visual checks for pipe conditions. pressure Bent or crashed pipe resistance...

  • Page 278: Low Pressure Check

    Check SiME332106E Low Pressure Check CHECK 2 Referring to the Fault Tree Analysis (FTA) shown below, probe the defective points [In cooling] mIs the pressure value checked with the Service Checker Defective low pressure ( 1) Defective sensor corresponding to the measurement value of the pressure sensor? compressor Defective mAre the voltage characteristics normal?

  • Page 279: Superheat Operation Check

    SiME332106E Check Superheat Operation Check CHECK 3 Referring to the Fault Tree Analysis (FTA) shown below, probe the defective points Hot gas circuit clogging Defective hot Defective solenoid gas bypass Are the coil resistance and insulation normal? valve coil control Defective solenoid valve body ( 1)
  • Page 280 Check SiME332106E 4. Judgment criteria of superheat operation: (1) Suction gas superheating degree: 10°C and over. (2) Discharge gas superheating degree: 45°C and over, except immediately after compressor starts up or is running under dropping control. (Use the above values as a guide. Depending on the other conditions, the unit may be normal despite the values within the above range.) Reference CHECK 7 Refer to page 279.

  • Page 281: Power Transistor Check

    SiME332106E Check Power Transistor Check CHECK 4 RXYMQ4AVMK Use a multimeter to measure the resistance to determine if the power transistor is defective or not. 1. Do not touch live parts (high voltage parts) within 10 minutes after turning off the power supply.
  • Page 282 Check SiME332106E RXYMQ4-6AYFK Perform the following procedures prior to check. (1) Power OFF. (2) Remove all the wiring connected to the PCB where power transistors are mounted on.  Prepare the analog type of multimeter. Preparation Multimeter For the digital type of multimeter, those with diode check function are available for the checking.
  • Page 283 SiME332106E Check PCB and Circuit Diagram Part 6 Service Diagnosis...

  • Page 284: Refrigerant Overcharge Check

    Check SiME332106E Refrigerant Overcharge Check CHECK 6 In case of VRV Systems, the only way to judge as the overcharge of refrigerant is with operating conditions due to the relationship to pressure control and electronic expansion valve control. As information for making a judgment, refer to the information below. Diagnosis of refrigerant overcharge 1.

  • Page 285: Refrigerant Shortage Check

    SiME332106E Check Refrigerant Shortage Check CHECK 7 In case of VRV Systems, the only way to judge as the shortage of refrigerant is with operating conditions due to the relationship to pressure control and electronic expansion valve control. As information for making a judgement, refer to the information below. Diagnosis of shortage of refrigerant 1.

  • Page 286: Vacuuming And Dehydration Procedure

    Check SiME332106E Vacuuming and Dehydration Procedure CHECK 8 Conduct vacuuming and dehydration in the piping system following the procedure for Normal vacuuming and dehydration described below. Furthermore, if moisture may get mixed in the piping system, follow the procedure for Special vacuuming and dehydration described below.

  • Page 287: Thermistor Check

    SiME332106E Check Thermistor Check CHECK 11 Thermistor type of indoor units Model Indoor heat exchanger Indoor heat exchanger Suction air thermistor (liquid) thermistor (gas) thermistor FXFSQ-AR Type C Type A FXDQ-PD FXDQ-ND Type A FXMQ-PB Type B Type J FXMQ-AR FXAQ-AR Thermistor type of outdoor units Thermistor...
  • Page 288 Check SiME332106E Thermistor Resistance (k) temperature Type A Type B Type C (°C) –30 363.8 361.7719 — –25 266.8 265.4704 — –20 197.8 196.9198 — –15 148.2 147.5687 — –10 112.0 111.6578 111.8 –5 85.52 85.2610 85.42 65.84 65.6705 65.80 51.05 50.9947 51.07...
  • Page 289 SiME332106E Check Thermistor Resistance (k) temperature Type E Type H Type J Type K (°C) –30 362.4862 3407 352.1 350.6 –25 265.9943 2540 261.2 257.4 –20 197.3083 1910 195.4 191.0 –15 147.8597 1449 147.3 143.2 –10 111.8780 1108 111.8 108.4 –5 85.4291 853.8...

  • Page 290: Pressure Sensor Check

    Check SiME332106E Pressure Sensor Check CHECK 12 Pressure Sensor and Voltage Characteristics 4.15 4.15 Detected Pressure (MPa) = × V – × 0.5 (kg/cm )(MPa) (MPa) = × V – × 0.5 51.0 5.0 : High pressure (MPa) 45.9 : Low pressure (MPa) High Pressure (P : Output Voltage (High Side) (VDC) 40.8...

  • Page 291: Broken Wire Check Of The Relay Wires

    SiME332106E Check 6.10 Broken Wire Check of the Relay Wires CHECK 15 Procedure for checking indoor-outdoor unit transmission wiring for broken wires Turn OFF the power supply to all equipment, short circuit between the indoor-outdoor unit terminal F1 and F2 in outdoor unit, and then conduct continuity checks between the transmission wiring F1 and F2 of "Indoor Unit a"...
  • Page 292 Check SiME332106E Indoor unit FXDQ-PD, FXDQ-ND 1. Turn OFF the power supply. 2. Measure the resistance between phases of U, V, W at the motor side connectors (3-core wire) to check that the values are balanced and there is no short circuiting, while connector or relay connector is disconnected.

  • Page 293: Fan Motor Connector Check (Signal Cable)

    SiME332106E Check 6.12 Fan Motor Connector Check (Signal Cable) CHECK 17 Resistance measuring points and judgment criteria. FXMQ40PB, FXAQ-AR White (1) Orange (2) Brown (3) Blue (4) — (5) — — (6) — Red (7) Measuring points Judgment criteria 1  or more 1 ...

  • Page 294: Electronic Expansion Valve Coil Check

    Check SiME332106E 6.13 Electronic Expansion Valve Coil Check CHECK 18 Remove the connector for electronic expansion valve from PCB. Measure the resistance value between pins and check the continuity to judge the condition. The normal products will show the following conditions. Outdoor unit X21A (Y1E) X22A (Y2E) *2...
  • Page 295 SiME332106E Check FXDQ-PD, FXDQ-ND White (1) Measuring points Judgment criteria φ1 Red (6) No continuity φ3 92 Ω Orange (3) 46 Ω 92 Ω φ2 φ4 46 Ω Yellow Blue (1) White (2) Yellow (3) Orange Blue (5) — (6) Red FXMQ-AR White (1) Measuring points...
  • Page 296 SiME332106E Part 7 Appendix 1. Wiring Diagrams..................291 1.1 Outdoor Unit ..................291 1.2 VRV Indoor Unit ...................293 Part 7 Appendix...
  • Page 297 SiME332106E Wiring Diagrams 1. Wiring Diagrams Outdoor Unit RXYMQ4AVMK C: 3D133942 Part 7 Appendix...
  • Page 298 Wiring Diagrams SiME332106E RXYMQ4/5/6AYFK C: 3D133944A Part 7 Appendix...
  • Page 299 SiME332106E Wiring Diagrams VRV Indoor Unit 1.2.1 Round Flow Cassette with Sensing FXFSQ25/32/40/50/63/80/100/125/140ARV1 Part 7 Appendix...
  • Page 300 Wiring Diagrams SiME332106E 1.2.2 Auto Grille Panel BYCQ125EBSF (Auto Grille Panel for FXFSQ-AR) Part 7 Appendix...
  • Page 301 SiME332106E Wiring Diagrams 1.2.3 Slim Duct (Standard Type) FXDQ20/25/32PDVM, FXDQ40/50/63NDVM Part 7 Appendix...
  • Page 302 Wiring Diagrams SiME332106E 1.2.4 Middle-high Static Pressure Duct FXMQ40/50/63/80/100/125/140PBV1 Part 7 Appendix...
  • Page 303 SiME332106E Wiring Diagrams FXMQ40/50/63/80/100ARV1 Part 7 Appendix...
  • Page 304 Wiring Diagrams SiME332106E 1.2.5 Wall Mounted FXAQ20/25/32/40/50/63ARVM Part 7 Appendix...
  • Page 305 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. z 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 unauthorized 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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