Daikin FTXM-V Series Service Manual
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Daikin FTXM-V Series Service Manual

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Service
Manual
Inverter Pair
Wall Mounted Type FTXM-V Series
SiUS042113E
[Applied Models]
Inverter Pair : Heat Pump

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Summary of Contents for Daikin FTXM-V Series

  • Page 1 SiUS042113E Service Manual Inverter Pair Wall Mounted Type FTXM-V Series [Applied Models] Inverter Pair : Heat Pump...

  • Page 2: Table Of Contents

    SiUS042113E 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 ....................7 3. Revision History ..................8 Part 1 General Information ............... 9 1.
  • Page 3 SiUS042113E 3.2 Frequency Control..................61 3.3 Standby Electricity Saving (Suspend Function) ......... 63 3.4 Controls at Mode Changing/Start-up............64 3.5 Discharge Pipe Temperature Control............66 3.6 Input Current Control.................. 67 3.7 Freeze-up Protection Control ..............68 3.8 Heating Peak-cut Control ................68 3.9 High Pressure Protection Control...............
  • Page 4 SiUS042113E 4.20 System Shutdown due to Temperature Abnormality in Compressor ..119 4.21 Compressor System Sensor Abnormality ..........120 4.22 Position Sensor Abnormality ..............121 4.23 DC Voltage/Current Sensor Abnormality..........124 4.24 Thermistor or Related Abnormality (Outdoor Unit)........126 4.25 Electrical Box Temperature Rise.............. 128 4.26 Radiation Fin Temperature Rise ..............

  • Page 5: Introduction

    SiUS042113E 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 ....................7 3. Revision History ..................8 Introduction...

  • Page 6: Safety Cautions

    Safety Cautions SiUS042113E 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. This manual is for the This appliance is person in charge of...
  • Page 7 SiUS042113E Safety Cautions Warning Be sure to discharge the capacitor completely before conducting repair work. The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit. A charged capacitor may cause an electrical shock. Do not turn the air conditioner on or off by plugging in or unplugging the power cable.

  • Page 8: Warnings And Cautions Regarding Safety Of Users

    Safety Cautions SiUS042113E Caution Be sure to check that the refrigerating cycle section has cooled down enough before conducting repair work. Working on the unit when the refrigerating cycle section is hot may cause burns. Conduct welding work in a well-ventilated place. Using the welder in an enclosed room may cause oxygen deficiency.
  • Page 9 SiUS042113E Safety Cautions Warning Do not mix air or gas other than the specified refrigerant (R-32 / R-410A / R-22) in the refrigerant system. If air enters the refrigerant system, an excessively high pressure results, causing equipment damage and injury. If the refrigerant gas leaks, be sure to locate the leaking point and repair it before charging the refrigerant.
  • Page 10 Safety Cautions SiUS042113E Caution Be sure to measure insulation resistance after the repair, and make sure that the resistance is 1 M or higher. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause water to enter the room and wet the furniture and floor.

  • Page 11: Icons Used

    SiUS042113E Icons Used 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 12: Revision History

    Revision History SiUS042113E 3. Revision History Month/Year Version Revised contents 04 / 2021 SiUS042113E First edition Introduction...

  • Page 13: Part 1 General Information

    SiUS042113E Part 1 General Information 1. Applicable Models ..................10 2. Functions....................11 Part 1 General Information...

  • Page 14: Applicable Models

    Applicable Models SiUS042113E 1. Applicable Models Indoor Unit FTXM09VVJU FTXM12VVJU FTXM18VVJU FTXM24VVJU Outdoor Unit RXM09VVJU RXM12VVJU RXM18VVJU RXM24VVJU Part 1 General Information...

  • Page 15: Functions

    SiUS042113E Functions 2. Functions FTXM-V series Category Functions 09/12 class 18/24 class Basic Functions Inverter (with inverter power control)   Operation limit Refer to page 167 Standby electricity saving   Compressor Swing compressor   Reluctance DC motor ...

  • Page 16: Part 2 Specifications

    SiUS042113E Part 2 Specifications 1. Specifications ....................13 Part 2 Specifications...

  • Page 17: Specifications

    SiUS042113E Specifications 1. Specifications Model Indoor Unit FTXM09VVJU FTXM12VVJU Outdoor Unit RXM09VVJU RXM12VVJU Cooling Heating Cooling Heating 1  1  Power Supply Phase Hz, V 60 Hz, 208 - 230 V 60 Hz, 208 - 230 V Capacity Rated (Min. - Max.) Btu/h 9,000 (4,400 ~ 12,500) 11,000 (4,400 ~ 19,500)
  • Page 18 Specifications SiUS042113E Model Indoor Unit FTXM18VVJU FTXM24VVJU Outdoor Unit RXM18VVJU RXM24VVJU Cooling Heating Cooling Heating 1  1  Power Supply Phase Hz, V 60 Hz, 208 - 230 V 60 Hz, 208 - 230 V Capacity Rated (Min. - Max.) Btu/h 18,000 (9,000 ~ 22,000) 21,600 (9,000 ~ 30,200)

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

    SiUS042113E Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................16 2. Outdoor Unit....................20 2.1 09/12 class ....................20 2.2 18/24 class ....................21 Part 3 Printed Circuit Board Connector Wiring Diagram...

  • Page 20: Indoor Unit

    Indoor Unit SiUS042113E 1. Indoor Unit Control PCB Connector for optional adaptor (A1P) Connector for optional adaptor S200 Connector for DC fan motor S300A, S301B Connector for power supply PCB (A2P) S400 Connector for swing motors S501 Connector for indoor heat exchanger thermistor (R1T) S600 Connector for humidity sensor PCB (A4P) S602...
  • Page 21 SiUS042113E Indoor Unit Power Supply S101 Connector for terminal strip (indoor-outdoor transmission) PCB (A2P) S102, S103 Connector for control PCB (A1P) Connector for terminal strip (frame ground) Fuse (3.15 A, 250 V) Varistor S102 S103 S101 2P578255-7 Part 3 Printed Circuit Board Connector Wiring Diagram...
  • Page 22 Indoor Unit SiUS042113E Display/Signal S920 Connector for control PCB (A1P) Receiver PCB Indoor unit ON/OFF switch (A3P) (Forced cooling operation ON/OFF switch) Refer to page 149 for details of forced cooling operation. LED for operation (green) LED for timer (yellow) LED for CLEAN operation (green) LED for INTELLIGENT EYE (green) LED for wireless LAN connection (yellow)
  • Page 23 SiUS042113E Indoor Unit Wireless LAN Connector Connector for control PCB (A1P) connection PCB (A6P) Connector 2P571193-4 Part 3 Printed Circuit Board Connector Wiring Diagram...

  • Page 24: Outdoor Unit

    Outdoor Unit SiUS042113E 2. Outdoor Unit 09/12 class Main PCB (A1P) Connector for electronic expansion valve coil Connector for overload protector Connector for DC fan motor Connector for four way valve Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe temperature) Connector for liquid pipe thermistor HL1, HN1, S...

  • Page 25: 18/24 Class

    SiUS042113E Outdoor Unit 18/24 class Main PCB (A1P) Connector for terminal block (indoor - outdoor transmission) Connector for electronic expansion valve coil (White) Connector for overload protector Connector for DC fan motor Connector for four way valve coil Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe, liquid pipe) S201, S202...
  • Page 26 Outdoor Unit SiUS042113E Service Monitor S501, S502 Connector for main PCB (A1P) PCB (A2P) LEDA LED for service monitor (green) SW5-3 Switch for facility setting Refer to page 153 for details. SW6-1 Switch for drain pan heater Refer to page 154 for details. LEDA S501 SW5-3...

  • Page 27: Part 4 Functions And Control

    SiUS042113E Part 4 Functions and Control 1. Main Functions..................24 1.1 Temperature Control .................. 24 1.2 Frequency Principle..................24 1.3 Airflow Direction Control................26 1.4 COMFORT AIRFLOW Operation ............... 27 1.5 Fan Speed Control for Indoor Unit ............. 29 1.6 Hybrid Cooling.................... 30 1.7 Automatic Cooling/Heating Changeover ............

  • Page 28: Main Functions

    Main Functions SiUS042113E 1. Main Functions Temperature Control Definitions of The definitions of temperatures are classified as following. Temperatures  Room temperature: temperature of lower part of the room  Set temperature: temperature set by remote controller  Room thermistor temperature: temperature detected by room temperature thermistor ...
  • Page 29 SiUS042113E Main Functions  When the frequency decreases, the rotation speed of the compressor decreases resulting in a decrease of refrigerant circulation. This leads to a smaller amount of heat exchange per unit. The following drawing shows a schematic view of the inverter principle: Refrigerant circulation rate (high) high speed Amount of heat...

  • Page 30: Airflow Direction Control

    Main Functions SiUS042113E Airflow Direction Control Power-Airflow The large flap sends a large volume of air downward to the floor and provides an optimum control in Dual Flaps cooling, dry and heating operation. Cooling/Dry During cooling or dry operation, the flap retracts into the indoor unit. Then, cool air can be blown far and distributed all over the room.

  • Page 31: Comfort Airflow Operation

    SiUS042113E Main Functions COMFORT AIRFLOW Operation Outline New flap structure is developed with technology Coanda. In cooling operation, ceiling airflow provides cool air upward along the ceiling as far as entire the room. In heating operation, draftless airflow directs warm air straight downward to your feet. ...
  • Page 32 Main Functions SiUS042113E Operation Comfort button To start the operation:  Press Comfort button. The icon appears on the display. COOL / DRY operation HEAT operation FAN operation Flaps direction Goes up Goes down Not available Airflow rate AUTO To stop the operation: ...

  • Page 33: Fan Speed Control For Indoor Unit

    SiUS042113E Main Functions Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature.

  • Page 34: Hybrid Cooling

    Main Functions SiUS042113E Hybrid Cooling Operation Hybrid cooling becomes effective when COOL or DRY is selected from MODE button of the remote controller. In cooling operation, hybrid cooling is automatically activated when the room temperature approaches to the target temperature set from the remote controller. When more cooling capacity is required, the operation automatically returns to the normal cooling operation.
  • Page 35 SiUS042113E Main Functions Details  Humidity to be removed The amount of air to be dehumidified changes depending on the amount of humidity to be removed. To remove the larger amount of humidity, the amount of air passing through the heat exchanger becomes larger while the absolute humidity difference unchanged.
  • Page 36 Main Functions SiUS042113E Refer to the table below for (a) Thermostat ON and (b) Thermostat OFF values in various room temperatures when dry operation is started. Temperature when dry operation is Thermostat Thermostat started 26°C (78.8°F) ≤ Room temperature –2.5°C –3°C –1.5°C –2°C...

  • Page 37: Automatic Cooling/Heating Changeover

    SiUS042113E Main Functions Automatic Cooling/Heating Changeover Outline When the automatic operation is selected with the remote controller, the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start-up. The unit automatically switches the operation mode to maintain the room temperature at the set temperature.

  • Page 38: Thermostat Control

    Main Functions SiUS042113E Thermostat Control Outline Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Details Thermostat OFF Conditions  The temperature difference is in the zone A. Thermostat ON Conditions  The temperature difference returns to the zone C after being in the zone A. ...

  • Page 39: Night Set Mode

    SiUS042113E Main Functions NIGHT SET Mode Outline When the OFF TIMER is set, NIGHT SET mode is automatically activated. NIGHT SET mode keeps the airflow rate setting. Details NIGHT SET mode continues operation at the target temperature for the first one hour, then automatically raises the target temperature slightly in the case of cooling, or lowers the target temperature slightly in the case of heating.

  • Page 40: 2-Area Intelligent Eye Operation

    Main Functions SiUS042113E To start operation  Press the Econo/Quiet button and select the desired mode.  Each time the Econo/Quiet button is pressed, a different setting option is displayed on the LCD. blank ECONO OUTDOOR UNIT Combination No Setting QUIET To cancel operation ...
  • Page 41 SiUS042113E Main Functions Image of 2-area INTELLIGENT EYE Wall Top view Indoor unit Area B Area A A microcomputer judges human presence by the human detection signal from each area A and B. (R22951) 2. Motions (in cooling) within within 20 min.
  • Page 42 Main Functions SiUS042113E 3. Airflow direction in 2-area INTELLIGENT EYE operation  Detection method: The opposite area of detected area is set as the target direction. Wall Top view Indoor unit Left Right Human Area A Area B (R3853) 1. Human detection signal ON in both areas A and B: Shift the airflow direction to area B (left side) 2.
  • Page 43 SiUS042113E Main Functions Notes on INTELLIGENT EYE operation  Application range is as follows. Horizontal Vertical angle 90° angle 110° (Side view) 55° 55° (Top view) 90°  If the air conditioner is in INTELLIGENT EYE operation and the mode “Do not blow directly on people”...

  • Page 44: Intelligent Eye Operation

    Main Functions SiUS042113E 1.12 INTELLIGENT EYE Operation Applicable FTXM18/24VVJU Models Outline This function detects the presence of humans in the room with a motion sensor and reduces the capacity when there is nobody in the room in order to save electricity. Details 1.
  • Page 45 SiUS042113E Main Functions Note(s) For dry operation, the temperature cannot be set with a remote controller, but the target temperature is shifted internally. Notes on Energy saving operation  If no presence detected in the room for 20 minutes, the energy saving operation will start, and the INTELLIGENT EYE lamp goes off.

  • Page 46: Powerful Operation

    Main Functions SiUS042113E 1.13 POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, the air conditioner can be operated by increasing the indoor fan rotating speed and the compressor frequency. Details When POWERFUL button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes.

  • Page 47: Clock Setting

    SiUS042113E Main Functions 1.14 Clock Setting ARC466 Series The clock can be set by taking the following steps: 1. Press Clock button.  is displayed, then MON and blink. 2. Press Select or Select button to set the clock to the current day of the week. 3.

  • Page 48: Weekly Timer Operation

    Main Functions SiUS042113E 1.15 WEEKLY TIMER Operation Outline Up to 4 timer settings can be saved for each day of the week (up to 28 settings in total). The 3 items: ON/OFF, temperature, and time can be set. Details Setting example of the WEEKLY TIMER The same timer settings are used from Monday through Friday, while different timer settings are used for the weekend.
  • Page 49 SiUS042113E Main Functions To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. program 1 program 2 program 3 program 4 [Monday] 77°F (25.0°C) 81°F (27.0°C)
  • Page 50 Main Functions SiUS042113E Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10-minute intervals. • To return to the ON/OFF TIMER mode setting, press • Proceed to STEP when setting the OFF TIMER. Press •...
  • Page 51 SiUS042113E Main Functions Copy mode • A reservation made once can be copied to another day of the week. The whole reservation of the selected day of the week will be copied. program 1 program 2 program 3 program 4 [Monday] 77°F (25.0°C) 81°F (27.0°C)
  • Page 52 Main Functions SiUS042113E • Setting Displays Normal Press • The day of the week and the reservation number of the current day will be displayed. Press to select the day of the week and the • Pressing displays the reservation details. •...
  • Page 53 SiUS042113E Main Functions To delete reservations An individual reservation Press • The day of the week and the reservation number will be displayed. Press to select the day of the week and the reservation number to be deleted. Press • “ ”...

  • Page 54: Brightness Setting Of Indoor Unit Display

    Main Functions SiUS042113E 1.16 Brightness Setting of Indoor Unit Display Outline The brightness of the indoor unit display can be adjusted as desired. Also, the display can be turned OFF. Details 1. Press and hold Menu button for 2 seconds. 2.

  • Page 55: Clean Operation

    SiUS042113E Main Functions 1.17 CLEAN Operation Outline The CLEAN function dries the interior of the indoor unit to reduce the amount of condensation present. When COOL or DRY operation is performed, condensation may occur inside the air conditioner. It is recommended to dry the inside of the air conditioner using CLEAN operation. Details ...
  • Page 56 Main Functions SiUS042113E Relation between CLEAN operation and indoor unit lamps Air conditioner CLEAN lamp Operating CLEAN is “ON” Lights up (OPERATION lamp lights up) CLEAN is “OFF” Goes off Not operating CLEAN is “ON” Goes off (OPERATION lamp goes off) Lights up (CLEAN is “Operating”) CLEAN is “OFF”...

  • Page 57: Wireless Lan Connection

    1.18 Wireless LAN Connection Operation Wireless LAN connection adapter The Wireless LAN connection adapter function requires the Daikin Comfort Control App for connecting to the air conditioner and controlling it via your smartphone or tablet over your network. Attention • Wireless LAN sends and receives data using radio waves so there is a risk of transmitted data being subject to eavesdropping and illegal access.
  • Page 58 For information on the latest version of Wireless LAN control, please see the web site above. For instruction about how to operate the Daikin Comfort Control App application, please refer to the operation manual at the web site. Contains FCC ID: VPYLB1YA This device complies with part 15 of the FCC Rules.
  • Page 59 SiUS042113E Main Functions „ While operation is stopped, press and hold the button for 5 seconds. Press • “ ” appears on the LCD. • “ ” blinks. Check the indoor unit LED. Wireless LAN connection adapter lamp Status Blinking for 1 second Communication is OK Please initialize the wireless LAN Blinking for 3 seconds...
  • Page 60 • The wireless LAN connection adapter lamp lights. Press to return to the default screen. Open the Daikin Comfort Control App and tap connect to the home network following the instructions on the screen. Connect your smartphone to the home network.
  • Page 61 SiUS042113E Main Functions To turn off the wireless connection „ To use the remote controller While operation is stopped, press and hold the button for 5 seconds. Press and select menu • “ ” appears on the LCD. • “ ”...

  • Page 62: Other Functions

    Main Functions SiUS042113E 1.19 Other Functions 1.19.1 Hot-Start Function In order to prevent the cold air blast that normally occurs when heating operation is started, the temperature of the indoor heat exchanger is detected, and the airflow is either stopped or significantly weakened resulting in comfortable heating.

  • Page 63: Thermistor Functions

    SiUS042113E Thermistor Functions 2. Thermistor Functions (6) Liquid Pipe (3) Outdoor (5) Room Thermistor Temperature Temperature Thermistor Expansion valve Thermistor (2) Outdoor Heat Exchanger Thermistor Four way valve (4) Indoor Heat Exchanger Thermistor Compressor (1) Discharge Pipe Thermistor (R25225) (1) Discharge ...
  • Page 64 Thermistor Functions SiUS042113E (5) Room  The room temperature thermistor detects the room air temperature and is used for controlling the room air temperature. Temperature Thermistor (6) Liquid Pipe  The liquid pipe thermistor is used for control in hybrid cooling. The microcomputer sets the Thermistor target liquid pipe temperature and controls the electronic expansion valve opening so that the temperature from the liquid pipe thermistor becomes the target temperature.

  • Page 65: Control Specification

    SiUS042113E Control Specification 3. Control Specification Mode Hierarchy Outline The air conditioner control has normal operation mode, forced operation mode, and power transistor test mode for installation and servicing. Details Air conditioner control mode Forced operation mode Forced cooling operation (for pump down operation) Power transistor test mode Normal operation mode Cooling (includes drying)
  • Page 66 Control Specification SiUS042113E Details 1. Determine command frequency Command frequency is determined in the following order of priority. (1) Limiting defrost control time (2) Forced cooling (3) Indoor frequency command 2. Determine upper limit frequency The minimum value is set as an upper limit frequency among the frequency upper limits of the following functions: Compressor protection, input current, discharge pipe temperature, heating peak-cut, freeze-up protection, defrost control.

  • Page 67: Standby Electricity Saving (Suspend Function)

    SiUS042113E Control Specification PI Control 1. P control The D value is calculated in each sampling time (20 seconds), and the frequency is adjusted according to its difference from the frequency previously calculated. 2. I control If the operating frequency does not change for more than a certain fixed time, the frequency is adjusted according to the D value.

  • Page 68: Controls At Mode Changing/Start-Up

    Control Specification SiUS042113E Controls at Mode Changing/Start-up 3.4.1 Preheating Control Applicable RXM18/24VVJU Models Outline The inverter operation in open phase starts with the conditions of the preheating command from the indoor unit, the outdoor temperature, the discharge pipe temperature, and the radiation fin temperature.
  • Page 69 SiUS042113E Control Specification 3.4.4 3-Minute Standby Turning on the compressor is prohibited for 3 minutes after turning off. The function is not used when defrosting. 3.4.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. (The function is not used when defrosting.) (Hz) Frequency...

  • Page 70: Discharge Pipe Temperature Control

    Control Specification SiUS042113E Discharge Pipe Temperature Control Outline The discharge pipe temperature is used as the internal temperature of the compressor. If the discharge pipe temperature rises above a certain level, the upper limit of frequency is set to keep the discharge pipe temperature from rising further.

  • Page 71: Input Current Control

    SiUS042113E Control Specification Input Current Control Outline The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit based on the input current. In case of heat pump models, this control is the upper limit control of the frequency and takes priority over the lower limit control of four way valve operation compensation.

  • Page 72: Freeze-Up Protection Control

    Control Specification SiUS042113E Freeze-up Protection Control Outline During cooling operation, the signal sent from the indoor unit determines the frequency upper limit and prevents freezing of the indoor heat exchanger. The signals from the indoor unit are divided into zones. Details The operating frequency limitation is judged with the indoor heat exchanger temperature.

  • Page 73: High Pressure Protection Control

    SiUS042113E Control Specification High Pressure Protection Control Outline In order to prevent abnormal high pressures in the system and hence avoiding activation of the high pressure safety device the below control function will be activated. Details High Pressure Protection Control 4.15 MPa Pressure Condensing...

  • Page 74: Outdoor Fan Control

    Control Specification SiUS042113E 3.10 Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF control during defrosting The outdoor fan is turned OFF while defrosting.

  • Page 75: Defrost Control

    SiUS042113E Control Specification 3.12 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish defrosting. Details Conditions for Starting Defrost ...

  • Page 76: Electronic Expansion Valve Control

    Control Specification SiUS042113E 3.13 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Open Control 1.
  • Page 77 SiUS042113E Control Specification 3.13.1 Initialization as Power Supply On The electronic expansion valve is initialized (fully closed) when the power is turned on. Then, the valve opening position is set and the pressure is equalized. 3.13.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalizing control is activated. The electronic expansion valve opens, and develops the pressure equalization.
  • Page 78 Control Specification SiUS042113E 3.13.7 Discharge Pipe Thermistor Disconnection Control Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensing temperature. If the discharge pipe thermistor is disconnected, the electronic expansion valve opens according to the outdoor temperature and the operation frequency, operates for a specified time, and then stops.

  • Page 79: Malfunctions

    SiUS042113E Control Specification 3.13.8 Target Discharge Pipe Temperature Control The target discharge pipe temperature is obtained from the indoor and outdoor heat exchanger temperature, and the electronic expansion valve opening is adjusted so that the actual discharge pipe temperature becomes close to the target discharge pipe temperature. (Indirect SH (superheating) control using the discharge pipe temperature) The target discharge pipe temperature is set as to become...

  • Page 80: Part 5 Remote Controller

    SiUS042113E Part 5 Remote Controller 1. Applicable Remote Controller ..............77 2. ARC466A70 ....................78 3. ARC466A71 ....................80 Part 5 Remote Controller...

  • Page 81: Applicable Remote Controller

    ARC466A71 FTXM24VVJU Note Refer to the operation manual of applicable model for details. You can download operation manuals from Daikin Business Portal: Daikin Business Portal  Document Search  Item Category  Installation/Operation Manual (URL: https://global1d.daikin.com/business_portal/login/) Part 5 Remote Controller...

  • Page 82: Arc466A70

    ARC466A70 SiUS042113E 2. ARC466A70 Signal transmitter Display (LCD) • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) TEMPERATURE Receiver adjustment buttons • Changes the temperature setting. • To use the remote controller, aim the transmitter at the indoor unit.
  • Page 83 SiUS042113E ARC466A70 Open the Front Cover Mode button • Selects the operation mode. AUTO COOL HEAT ECONO /QUIET button • Every time you press ECONO/QUIET button, the setting changes in the following order. ECONO OUTDOOR UNIT QUIET SENSOR button Blank (INTELLIGENT EYE No setting Combination...

  • Page 84: Arc466A71

    ARC466A71 SiUS042113E 3. ARC466A71 Signal transmitter Display (LCD) • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) TEMPERATURE Receiver adjustment buttons • Changes the temperature setting. • To use the remote controller, aim the transmitter at the indoor unit.
  • Page 85 SiUS042113E ARC466A71 Open the Front Cover Mode button • Selects the operation mode. AUTO COOL HEAT ECONO /QUIET button • Every time you press ECONO/QUIET button, the setting changes in the following order. ECONO OUTDOOR UNIT QUIET Blank SENSOR button No setting Combination (INTELLIGENT EYE...

  • Page 86: Part 6 Service Diagnosis

    SiUS042113E Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items .........84 2. Troubleshooting with LED .................85 2.1 Indoor Unit....................85 2.2 Outdoor Unit ....................85 3. Service Diagnosis ..................86 3.1 Method 1 ....................86 3.2 Method 2 ....................87 4.
  • Page 87 SiUS042113E 5.4 Electronic Expansion Valve Check............136 5.5 Four Way Valve Performance Check ............137 5.6 Inverter Unit Refrigerant System Check........... 138 5.7 Inverter Analyzer Check ................138 5.8 Rotation Pulse Check on the Outdoor Unit PCB ........140 5.9 Installation Condition Check..............141 5.10 Discharge Pressure Check...............

  • Page 88: General Problem Symptoms And Check Items

    General Problem Symptoms and Check Items SiUS042113E 1. General Problem Symptoms and Check Items Reference Symptom Check Item Measures Page The unit does not Check the power supply. Check if the rated voltage is supplied. — operate. Check the type of the indoor unit. Check if the indoor unit type is compatible with the —...

  • Page 89: Troubleshooting With Led

    SiUS042113E Troubleshooting with LED 2. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. A protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions.

  • Page 90: Service Diagnosis

    Service Diagnosis SiUS042113E 3. Service Diagnosis Method 1 1. When Timer Cancel button is held down for 5 seconds, 00 is displayed on the temperature display screen. 2. Press Timer Cancel button repeatedly until a long beep sounds. Timer Cancel button (R24045) <...

  • Page 91: Method 2

    SiUS042113E Service Diagnosis Method 2 1. Press the center of Temp button and Mode button at the same time. (R24046) 5C is displayed on the LCD. R6000375 2. Select 5C (service check) with Temp or Temp button. 3. Press Mode button to enter the service check mode. (R24047) The left-side number blinks.
  • Page 92 Service Diagnosis SiUS042113E  Long beep: Both the left-side and right-side numbers correspond with the error code. The numbers indicated when you hear the long beep are the error code. Refer to page 89. 6. Press Mode button. (R24047) The right-side number blinks. (R11673) 7.

  • Page 93: Troubleshooting

    SiUS042113E Troubleshooting 4. Troubleshooting Error Codes and Description Error Reference Description Codes Page System Normal — U0 Refrigerant shortage Low-voltage detection or over-voltage detection Signal transmission error (between indoor unit and outdoor unit) Unspecified voltage (between indoor unit and outdoor unit) Indoor Indoor unit PCB abnormality Unit...

  • Page 94: Indoor Unit Pcb Abnormality

    Troubleshooting SiUS042113E Indoor Unit PCB Abnormality Error Code Method of Error The system checks if the circuit works properly within the microcomputer of the indoor unit. Detection Error Decision The system cannot set the internal settings. Conditions Supposed  Defective indoor unit PCB Causes ...

  • Page 95: Freeze-Up Protection Control/Heating Peak-Cut Control

    SiUS042113E Troubleshooting Freeze-up Protection Control/Heating Peak-cut Control Error Code Method of Error  Freeze-up protection control Detection During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor.  Heating peak-cut control During heating operation, the temperature detected by the indoor heat exchanger thermistor is used for the heating peak-cut control (operation halt, outdoor fan stop, etc.) Error Decision...
  • Page 96 Troubleshooting SiUS042113E Reference Check No.01 Refer to P.134 Part 6 Service Diagnosis...

  • Page 97: Indoor Fan Motor (Dc Motor) Or Related Abnormality

    SiUS042113E Troubleshooting Indoor Fan Motor (DC Motor) or Related Abnormality Error Code Method of Error The rotation speed detected by the microcomputer software during indoor fan motor operation Detection determines abnormal fan motor operation. Error Decision  The detected rotation speed does not reach the demanded rotation speed of the target tap, and Conditions is less than 50% of the maximum fan motor rotation speed.
  • Page 98 Troubleshooting SiUS042113E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Note: The motor may break when the Turn off the power supply. motor connector is disconnected (Unplug the power cable or turn with the power supply on.

  • Page 99: Thermistor Or Related Abnormality

    SiUS042113E Troubleshooting Thermistor or Related Abnormality C4, C9 Error Code Method of Error The temperatures detected by the thermistors determine thermistor errors. Detection Error Decision The communication error of thermistor(s) or malfunction of thermistor(s). Conditions Supposed  Disconnection of connector Causes ...

  • Page 100: Humidity Sensor Abnormality

    Troubleshooting SiUS042113E Humidity Sensor Abnormality Error Code Method of Error Sensor abnormality is detected by input value. Detection Error Decision The communication error of humidity sensor or malfunction of humidity sensor. Conditions Supposed  Disconnection of connector Causes  Defective humidity sensor ...

  • Page 101: Refrigerant Shortage

    SiUS042113E Troubleshooting Refrigerant Shortage Error Code Method of Error Refrigerant shortage detection I: Detection Refrigerant shortage is detected by checking the input current value and the compressor running frequency. If there is insufficient refrigerant, the input current tends to be lower than the normal value.
  • Page 102 Troubleshooting SiUS042113E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Any thermistor Reconnect the thermistor(s). disconnected? ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗ Room temperature thermistor ∗...

  • Page 103: Low-Voltage Detection Or Over-Voltage Detection

    SiUS042113E Troubleshooting Low-voltage Detection or Over-voltage Detection Error Code Method of Error  Indoor Unit Detection Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit.  Outdoor Unit Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit. Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit.
  • Page 104 Troubleshooting SiUS042113E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation Correct the power supply. within ±10% from the rated value? Check the connection of the compressor harness.

  • Page 105: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    SiUS042113E Troubleshooting Signal Transmission Error (Between Indoor Unit and Outdoor Unit) Error Code Method of Error The signal transmission data received from the outdoor unit is checked whether it is normal. Detection Error Decision The data sent from the outdoor unit cannot be received normally, or the content of the data is Conditions abnormal.
  • Page 106 Troubleshooting SiUS042113E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% Correct the power supply. from the rated value? Check the indoor unit - outdoor unit connection wires.

  • Page 107: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    SiUS042113E Troubleshooting 4.10 Unspecified Voltage (Between Indoor Unit and Outdoor Unit) Error Code Method of Error The supply power is detected for its requirements (pair type is different from multi type) by the Detection indoor/outdoor transmission signal. Error Decision The pair type and multi type are interconnected. Conditions Supposed ...

  • Page 108: Outdoor Unit Pcb Abnormality

    Troubleshooting SiUS042113E 4.11 Outdoor Unit PCB Abnormality Error Code Method of Error  The system checks if the microprocessor is working in order. Detection  The system checks if the zero-cross signal comes in properly. Error Decision  The microprocessor program runs out of control. Conditions ...

  • Page 109: Actuation Of High Pressure Switch

    SiUS042113E Troubleshooting 4.12 Actuation of High Pressure Switch Error Code Method of Error Abnormality is detected when the contact of the high pressure switch opens. Detection Error Decision  High pressure switch (S1PH) activating pressure: 4.15 MPa Conditions  High pressure switch (S1PH) recovery pressure: 3.2 MPa Supposed ...

  • Page 110: Ol Activation (Compressor Overload)

    Troubleshooting SiUS042113E 4.13 OL Activation (Compressor Overload) Error Code Method of Error A compressor overload is detected through compressor OL. Detection Error Decision  If the error repeats, the system is shut down. Conditions  Reset condition: Continuous run for about 60 minutes without any other error Supposed ...
  • Page 111 SiUS042113E Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Discharge pipe thermistor Insert the thermistor in disconnected? position. Check No. 01 Replace the discharge pipe Check the discharge pipe thermistor.
  • Page 112 Troubleshooting SiUS042113E Reference Check No.13 Refer to P.137 Reference Check No.14 Refer to P.138 Part 6 Service Diagnosis...

  • Page 113: Compressor Lock

    SiUS042113E Troubleshooting 4.14 Compressor Lock Error Code Method of Error A compressor lock is detected by the current waveform generated when applying high-frequency Detection voltage to the motor. Error Decision  If the error repeats, the system is shut down. Conditions ...

  • Page 114: Dc Fan Lock

    Troubleshooting SiUS042113E 4.15 DC Fan Lock Error Code Method of Error An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Detection Error Decision  The fan does not start in 15 ~ 30 seconds even when the fan motor is running. Conditions ...

  • Page 115: Input Overcurrent Detection

    SiUS042113E Troubleshooting 4.16 Input Overcurrent Detection Error Code Method of Error An input overcurrent is detected by checking the input current value with the compressor running. Detection Error Decision The current exceeds about 13 ~ 20 A (depending on the model) for 2.5 seconds with the Conditions compressor running.
  • Page 116 Troubleshooting SiUS042113E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. * An input overcurrent may result from wrong internal wiring. If the system is interrupted by an input overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again.

  • Page 117: Four Way Valve Abnormality

    SiUS042113E Troubleshooting 4.17 Four Way Valve Abnormality Error Code Method of Error The room temperature thermistor and the indoor heat exchanger thermistor are checked if they Detection function within their normal ranges in each operation mode. Error Decision The following condition continues over 1 ~ 10 minutes (depending on the model) after operating for Conditions 5 ~ 10 minutes (depending on the model).
  • Page 118 Troubleshooting SiUS042113E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Four way valve coil disconnected (loose)? Correct the four way valve coil. Harness Reconnect the harness. disconnected? Check the continuity of the four way valve coil and harness.

  • Page 119: Discharge Pipe Temperature Control

    SiUS042113E Troubleshooting 4.18 Discharge Pipe Temperature Control Error Code Method of Error An error is determined with the temperature detected by the discharge pipe thermistor. Detection Error Decision  If the temperature detected by the discharge pipe thermistor rises above A, the compressor Conditions stops.
  • Page 120 Troubleshooting SiUS042113E Reference Check No.01 Refer to P.134 Reference Check No.12 Refer to P.136 Reference Check No.14 Refer to P.138 Part 6 Service Diagnosis...

  • Page 121: High Pressure Control In Cooling

    SiUS042113E Troubleshooting 4.19 High Pressure Control in Cooling Error Code Method of Error High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the Detection temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Error Decision ...
  • Page 122 Troubleshooting SiUS042113E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the installation space. Check No. 17 Check the installation Change the installation condition. location or direction. Clean the outdoor heat exchanger.

  • Page 123: System Shutdown Due To Temperature Abnormality In Compressor

    SiUS042113E Troubleshooting 4.20 System Shutdown due to Temperature Abnormality in Compressor Error Code Method of Error Operation is halted when the temperature detected by the discharge pipe thermistor exceeds the Detection determined limit. Error Decision Temperature exceeds the detection threshold of 127.5°C (261.5°F) during forced cooling operation. Conditions Supposed ...

  • Page 124: Compressor System Sensor Abnormality

    Troubleshooting SiUS042113E 4.21 Compressor System Sensor Abnormality Error Code Method of Error The system checks the DC current before the compressor starts. Detection Error Decision  The voltage converted from the DC current before compressor start-up is out of the range 0.5 ~ Conditions 4.5 V.

  • Page 125: Position Sensor Abnormality

    SiUS042113E Troubleshooting 4.22 Position Sensor Abnormality Error Code Method of Error A compressor start-up failure is detected by checking the compressor running condition through the Detection position detection circuit. Error Decision  If the error repeats, the system is shut down. Conditions ...
  • Page 126 Troubleshooting SiUS042113E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power. Check the power supply voltage. Is the power supply voltage fluctuation within Correct the power supply. ±10% from the rated value? Check No.
  • Page 127 SiUS042113E Troubleshooting Reference Check No.15 Refer to P.138 Reference Check No.18 Refer to P.142 Reference Check No.20 Refer to P.142 Part 6 Service Diagnosis...

  • Page 128: Dc Voltage/Current Sensor Abnormality

    Troubleshooting SiUS042113E 4.23 DC Voltage/Current Sensor Abnormality Error Code Method of Error DC voltage or DC current sensor abnormality is identified based on the compressor running Detection frequency and the input current. Error Decision  If the error repeats, the system is shut down. Conditions ...
  • Page 129 SiUS042113E Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power. Then, turn on the power to restart the system. Start operation. Running current as shown at right Replace the outdoor unit with relay cable 1 PCB (main PCB).

  • Page 130: Thermistor Or Related Abnormality (Outdoor Unit)

    Troubleshooting SiUS042113E 4.24 Thermistor or Related Abnormality (Outdoor Unit) H9, J3, J6, J8, P4 Error Code Method of Error This fault is identified based on the thermistor input voltage to the microcomputer. Detection A thermistor fault is identified based on the temperature sensed by each thermistor. Error Decision ...
  • Page 131 SiUS042113E Troubleshooting Troubleshooting In case of H9, J3, J6, J8 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn on the power again. Error displayed again on remote Reconnect the connectors controller? or thermistors.

  • Page 132: Electrical Box Temperature Rise

    Troubleshooting SiUS042113E 4.25 Electrical Box Temperature Rise Error Code Method of Error An electrical box temperature rise is detected by checking the radiation fin thermistor with the Detection compressor off. Error Decision  With the compressor off, the radiation fin temperature is above A. Conditions ...

  • Page 133: Radiation Fin Temperature Rise

    SiUS042113E Troubleshooting 4.26 Radiation Fin Temperature Rise Error Code Method of Error A radiation fin temperature rise is detected by checking the radiation fin thermistor with the Detection compressor on. Error Decision  If the radiation fin temperature with the compressor on is above A. Conditions ...
  • Page 134 Troubleshooting SiUS042113E Troubleshooting 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 to restart the system. Has the PCB Error displayed Check if silicone grease is been replaced? again?

  • Page 135: Output Overcurrent Detection

    SiUS042113E Troubleshooting 4.27 Output Overcurrent Detection Error Code Method of Error An output overcurrent is detected by checking the current that flows in the inverter DC section. Detection Error Decision  A position signal error occurs while the compressor is running. Conditions ...
  • Page 136 Troubleshooting SiUS042113E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again.
  • Page 137 SiUS042113E Troubleshooting Reference Check No.15 Refer to P.138 Reference Check No.17 Refer to P.141 Reference Check No.18 Refer to P.142 Reference Check No.22 Refer to P.145 Part 6 Service Diagnosis...

  • Page 138: Check

    Check SiUS042113E 5. Check Thermistor Resistance Check Check No.01 Measure the resistance of each thermistor using multimeter. The resistance values are defined by below table. If the measured resistance value does not match the listed value, the thermistor must be replaced. ...

  • Page 139: Indoor Fan Motor Connector Check

    SiUS042113E Check Indoor Fan Motor Connector Check Check No.03  Fan motor wire breakdown/short circuit check 1. Check the connector for connection. 2. Turn the power off. 3. Check if each resistance at the phases U - V and V - W is within specified range in the table below.

  • Page 140: Electronic Expansion Valve Check

    Check SiUS042113E Electronic Expansion Valve Check Check No.12 Conduct the following to check the electronic expansion valve (EV). 1. Check if the EV connector is correctly connected to the PCB. 2. Turn the power off and on again, and check if the EV generates a latching sound. 3.

  • Page 141: Four Way Valve Performance Check

    SiUS042113E Check Four Way Valve Performance Check Check No.13 < Caution on resetting the power supply > Be sure to wait for 30 sec. or more after turning off the power. Turn off the power and turn it on again. S80 voltage at 0 VDC with compressor on? Replace the outdoor unit...

  • Page 142: Inverter Unit Refrigerant System Check

    Check SiUS042113E Inverter Unit Refrigerant System Check Check No.14 Refrigerant system check Is the discharge pipe thermistor Reconnect the thermistor. disconnected from the holder? Check for refrigerant leakage. See the service diagnosis on refrigerant shortage (U0). Replace the refrigerant. (R15833) Inverter Analyzer Check Check No.15 ...
  • Page 143 SiUS042113E Check (2) Connect the terminals to the (1) Remove the terminals from terminals of the inverter the compressor. analyzer. Compressor Compressor Inverter analyzer Be careful not to let the terminals (U,V,W) touch each other. Otherwise, high voltage is applied. (R22731) Reference: If the terminals of the compressor are not FASTON terminals (difficult to remove the wire on the...

  • Page 144: Rotation Pulse Check On The Outdoor Unit Pcb

    Check SiUS042113E 2. On completion of the inverter analyzer diagnosis, be sure to re-crimp the FASTON terminals. Otherwise, the terminals may be burned due to loosening. Direction of crimp This size is shortened by the crimp. FASTON terminal (R15292) Rotation Pulse Check on the Outdoor Unit PCB Check No.16 Outdoor fan motor ...

  • Page 145: Installation Condition Check

    SiUS042113E Check Actual rotation pulse input (0 ~ 15 VDC) Rotation command voltage (0 ~ 6.5 VDC) Control voltage 15 VDC 320 VDC (R25288) Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction.

  • Page 146: Discharge Pressure Check

    Check SiUS042113E 5.10 Discharge Pressure Check Check No.18 Discharge pressure check High? Replace the compressor. Is the stop valve Open the stop valve. open? Is the connection pipe deformed? Replace the pipe installed at the site. Is the air filter or indoor/outdoor heat Replace the compressor.
  • Page 147 SiUS042113E Check  09/12 class Multimeter  18/24 class Multimeter (R24538) Part 6 Service Diagnosis...

  • Page 148: Capacitor Voltage Check

    Check SiUS042113E 5.13 Capacitor Voltage Check Check No.21 Before this check, turn the circuit breaker off and wait for 10 minutes for prevention of electric shock.  09/12 class R6000792  To prevent electrical shock, use a multimeter to check that the voltage between DC_P2 (+) and DC_N2 (–) is 50 V or less.

  • Page 149: Power Module Check

    SiUS042113E Check 5.14 Power Module Check Check No.22 Check to make sure that the voltage between (+) and (–) of the power module is about 0 V before checking.  Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.
  • Page 150 Check SiUS042113E  18/24 class DC– (R24539) Part 6 Service Diagnosis...

  • Page 151: Part 7 Trial Operation And Field Settings

    SiUS042113E Part 7 Trial Operation and Field Settings 1. Pump Down Operation................148 2. Forced Cooling Operation ...............149 3. Trial Operation ..................150 4. Field Settings ..................152 4.1 Temperature Display Switch ..............152 4.2 When 2 Units are Installed in 1 Room............152 4.3 Facility Setting (cooling at low outdoor temperature) .......

  • Page 152: Pump Down Operation

    Pump Down Operation SiUS042113E 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing of the unit. Details 1. Remove the valve caps from the liquid stop valve and the gas stop valve. 2.

  • Page 153: Forced Cooling Operation

    SiUS042113E Forced Cooling Operation 2. Forced Cooling Operation Outline The forced cooling operation is allowed when both the following conditions are met. 1. The outdoor unit is not abnormal and not in the 3-minute standby mode. 2. The outdoor unit is not operating. Protection functions have priority over all other functions during forced cooling operation.

  • Page 154: Trial Operation

    Trial Operation SiUS042113E 3. Trial Operation Outline Trial operation should be carried out in either cooling or heating operation. 1. Measure the supply voltage and make sure that it is within the specified range. 2. In cooling operation, select the lowest programmable temperature; in heating operation, select the highest programmable temperature.
  • Page 155 SiUS042113E Trial Operation Test Items Test items Symptom Indoor and outdoor units are installed securely. Fall, vibration, noise No refrigerant gas leaks. Incomplete cooling/heating function Refrigerant gas and liquid pipes and indoor drain Water leakage hose extension are thermally insulated. Draining line is properly installed.

  • Page 156: Field Settings

    Field Settings SiUS042113E 4. Field Settings Temperature Display Switch Procedure  Press the upper side of Temp button and On button at the same time for 5 seconds to change the unit of temperature display. (R22009) When 2 Units are Installed in 1 Room Outline When 2 indoor units are installed in 1 room, 1 of the 2 indoor units and the corresponding wireless remote controller can be set for different address.

  • Page 157: Facility Setting (Cooling At Low Outdoor Temperature)

    SiUS042113E Field Settings Jumper (J4) ADDRESS EXIST Temp button (R22634) Mode button R7000202 Indoor unit ON/OFF switch and operation lamp R7000337 Caution Replace the remote controller if you cut a jumper unintentionally. Jumpers are necessary for electronic circuit. Improper operation may occur if you cut any of them. Facility Setting (cooling at low outdoor temperature) Outline This function is limited only for facilities (the target of air conditioning is equipment such as...

  • Page 158: Drain Pan Heater

    Field Settings SiUS042113E Reference For the location of the jumper, refer to page 20. Caution  If the outdoor unit is installed where the heat exchanger of the unit is exposed to direct wind, provide a windbreak wall.  Intermittent noises may be produced by the indoor unit due to the outdoor fan turning on and off when using facility settings.

  • Page 159: Service Mode Of Wireless Remote Controller

    SiUS042113E Field Settings Service Mode of Wireless Remote Controller The remote controller mode is hierarchized by special conditions and operation content. Refer below for the main hierarchy of the menu. Normal mode Simplified service diagnosis on normal mode Normal mode is operated by the end user. The code indication changes every time the TIMER CANCEL button is pressed.
  • Page 160 Field Settings SiUS042113E Field settings mode Room temperature adjustment settings may be applied. When changing the settings, make sure the button was correctly pressed by listening for the beep sound. (The beep can be heard even if the button is pressed within a setting which is unavailable.
  • Page 161 SiUS042113E Field Settings Notes Set value on remote controller display may differ from the set value of indoor unit itself, as remote controller is not synchronized with indoor unit. Part 7 Trial Operation and Field Settings...

  • Page 162: Silicone Grease On Power Transistor/Diode Bridge

    Silicone Grease on Power Transistor/Diode Bridge SiUS042113E 5. Silicone Grease on Power Transistor/Diode Bridge Outline Apply the specified silicone grease to the heat radiation part of a power transistor/diode bridge when you replace an outdoor unit PCB. The silicone grease encourages the heat radiation of a power transistor/diode bridge.

  • Page 163: Part 8 Appendix

    SiUS042113E Part 8 Appendix 1. Piping Diagrams..................160 1.1 Indoor Unit....................160 1.2 Outdoor Unit ..................... 161 2. Wiring Diagrams..................163 2.1 Indoor Unit....................163 2.2 Outdoor Unit ..................... 165 3. Operation Limit..................167 Part 8 Appendix...

  • Page 164: Piping Diagrams

    Piping Diagrams SiUS042113E 1. Piping Diagrams Indoor Unit FTXM09/12VVJU FTXM18VVJU 4D132956 4D132992 FTXM24VVJU 4D132994 Part 8 Appendix...

  • Page 165: Outdoor Unit

    SiUS042113E Piping Diagrams Outdoor Unit RXM09/12VVJU 3D131979 RXM18VVJU 3D132216 Part 8 Appendix...
  • Page 166 Piping Diagrams SiUS042113E RXM24VVJU 3D132217 Part 8 Appendix...

  • Page 167: Wiring Diagrams

    SiUS042113E Wiring Diagrams 2. Wiring Diagrams Indoor Unit FTXM09/12VVJU C: 3D129547A Note(s) A1P: Control PCB A2P: Power supply PCB A3P: Display/signal receiver PCB A4P: Humidity sensor PCB A5P: INTELLIGENT EYE sensor PCB A6P: Wireless LAN connection PCB Refer to page 16 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
  • Page 168 Wiring Diagrams SiUS042113E FTXM18/24VVJU C: 3D129548A Note(s) A1P: Control PCB A2P: Power supply PCB A3P: Display/signal receiver PCB A4P: Humidity sensor PCB A5P: INTELLIGENT EYE sensor PCB A6P: Wireless LAN connection PCB Refer to page 16 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...

  • Page 169: Outdoor Unit

    SiUS042113E Wiring Diagrams Outdoor Unit RXM09/12VVJU C: 3D129643B Note(s) A1P: Main PCB Refer to page 20 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
  • Page 170 Wiring Diagrams SiUS042113E RXM18/24VVJU C: 3D129644B Note(s) A1P: Main PCB A2P: Service monitor PCB Refer to page 21 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...

  • Page 171: Operation Limit

    SiUS042113E Operation Limit 3. Operation Limit RXM09/12/18/24VVJU 3D133582A Part 8 Appendix...
  • Page 172 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion.  Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of 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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