Page 1 SiUS092230E Service Manual Inverter Pair RX-W Series [Applied Models] Inverter Pair : Heat Pump...
Page 2 SiUS092230E 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 SiUS092230E 2.6 NIGHT SET Mode ..................45 2.7 ECONO Operation ..................45 2.8 2-Area INTELLIGENT EYE Operation ............46 2.9 POWERFUL Operation ................48 2.10 Multi-Monitor Lamp/TIMER Lamp .............. 49 2.11 Clock Setting ....................50 2.12 WEEKLY TIMER Operation ............... 51 2.13 Other Functions..................
Page 4 SiUS092230E Part 6 Service Diagnosis ............... 108 1. General Problem Symptoms and Check Items ........110 2. Troubleshooting with LED ...............111 2.1 Indoor Unit....................111 2.2 Outdoor Unit ..................... 113 3. Service Diagnosis ...................114 3.1 ARC466 Series..................114 3.2 BRC1E73 ....................117 3.3 BRC082A43, BRC082A41W, BRC082A42W(S)........
Page 5 SiUS092230E 7.11 System Shutdown due to Temperature Abnormality in the Compressor..................174 7.12 Compressor Sensor System Abnormality ..........175 7.13 Position Sensor Abnormality ..............176 7.14 DC Voltage/Current Sensor Abnormality..........179 7.15 Thermistor or Related Abnormality (Outdoor Unit)........180 7.16 Electrical Box Temperature Rise.............. 182 7.17 Radiation Fin Temperature Rise ..............
Page 6 SiUS092230E 7. Silicone Grease on Power Transistor/Diode Bridge........227 Part 8 Appendix ................228 1. Piping Diagrams..................229 1.1 Indoor Unit....................229 1.2 Outdoor Unit ..................... 230 2. Wiring Diagrams..................232 2.1 Indoor Unit....................232 2.2 Outdoor Unit ..................... 235 3. Operation Limit..................237 Table of Contents...
Page 7 SiUS092230E 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 8 Safety Cautions SiUS092230E 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 person in charge of maintenance and...
Page 9 SiUS092230E 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 10 Safety Cautions SiUS092230E 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 11 SiUS092230E 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 12 Safety Cautions SiUS092230E 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 13 SiUS092230E 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 14 Revision History SiUS092230E 3. Revision History Month/Year Version Revised contents 11 / 2022 SiUS092230E First edition Introduction...
Page 15 SiUS092230E Part 1 General Information 1. Applicable Models ..................10 2. Functions....................11 Part 1 General Information...
Page 16 Applicable Models SiUS092230E 1. Applicable Models Indoor Unit Wall mounted type Duct concealed type Ceiling cassette type FTXR09WVJUW9 FDMQ09WVJU9 FFQ09W2VJU9 FTXR09WVJUS9 FDMQ12WVJU9 FFQ12W2VJU9 FFQ15W2VJU9 FTXR12WVJUW9 FDMQ15WVJU9 FTXR12WVJUS9 FDMQ18WVJU9 FFQ18W2VJU9 FTXR18WVJUW9 FDMQ24WVJU9 FTXR18WVJUS9 Outdoor Unit RX09WMVJU9 RX12WMVJU9 RX15WMVJU9 RX18WMVJU9 RX24WMVJU9 Part 1 General Information...
Page 17 SiUS092230E Functions 2. Functions FDMQ Functions Mounted BYFQ60B3W1 FTXR Wired Wireless Wired Wireless Wired Wireless PAM control — — — — — — — Compressor — — — — — — — — — — — — — — — —...
Page 18 Functions SiUS092230E FDMQ Functions Mounted BYFQ60B3W1 FTXR Wired Wireless Wired Wireless Wired Wireless — — — — — — — — — — — — — — — Option Option Option Option — — — — — — — — —...
Page 19 SiUS092230E Part 2 Specifications 1. Specifications ....................14 1.1 Wall Mounted Type ..................14 1.2 Duct Concealed Type................. 17 1.3 Ceiling Cassette Type ................20 Part 2 Specifications...
Page 20 Specifications SiUS092230E 1. Specifications Wall Mounted Type Indoor Unit FTXR09WVJUW9 FTXR09WVJUS9 Model RX09WMVJU9 RX09WMVJU9 Outdoor Unit Cooling Cooling 4.28 - 3.87 3.83 - 3.46 4.28 - 3.87 3.83 - 3.46 819 - 819 733 - 733 819 - 819 733 - 733 92.0 - 92.0 92.0 - 92.1 92.0 - 92.0...
Page 21 SiUS092230E Specifications Indoor Unit FTXR12WVJUW9 FTXR12WVJUS9 Model RX12WMVJU9 RX12WMVJU9 Outdoor Unit Cooling Cooling 5.46 - 4.94 5.60 - 5.06 5.46 - 4.94 5.60 - 5.06 1,091 - 1,091 1,106 -1,106 1,091 - 1,091 1,106 - 1,106 96.1 - 96.0 95.0 - 95.0 96.1 - 96.0 95.0 - 95.0 SEER2 / HSPF2...
Page 22 Specifications SiUS092230E Indoor Unit FTXR18WVJUW9 FTXR18WVJUS9 Model RX18WMVJU9 RX18WMVJU9 Outdoor Unit Cooling Cooling 9.29 - 8.40 8.70 - 7.89 9.29 - 8.40 8.70 - 7.89 1,875 - 1,875 1,755 - 1,755 1,875 - 1,875 1,755 - 1,755 97.0 - 97.0 97.0 - 97.0 97.0 - 97.0 97.0 - 97.0...
Page 23 SiUS092230E Specifications Duct Concealed Type Indoor Unit FDMQ09WVJU9 FDMQ12WVJU9 Model RX09WMVJU9 RX12WMVJU9 Outdoor Unit Cooling Cooling 5.30 - 4.79 5.34 - 4.83 6.14 - 5.55 6.48 - 5.86 1,059 - 1,059 1,065 - 1,065 1,227 - 1,227 1,329 - 1,329 96.1 - 96.1 95.9 - 95.8 96.1 - 96.2...
Page 24 Specifications SiUS092230E Indoor Unit FDMQ15WVJU9 FDMQ18WVJU9 Model RX15WMVJU9 RX18WMVJU9 Outdoor Unit Cooling Cooling 7.25 - 6.56 8.72 - 7.89 9.16 - 8.28 10.41 - 9.41 1,440 - 1,440 1,758 - 1,758 1,872 - 1,872 2,110 - 2,110 95.5 - 95.4 96.9 - 96.9 98.3 - 98.3 97.4 - 97.5...
Page 25 SiUS092230E Specifications Indoor Unit FDMQ24WVJU9 Model RX24WMVJU9 Outdoor Unit Cooling 10.56 - 9.55 11.37 - 10.28 2,180 - 2,180 2,345 - 2,345 99.2 - 99.2 99.2 - 99.2 SEER2 / HSPF2 15.20 8.10 10.00 — — 3.00 Liquid Piping Connections I.D.
Page 26 Specifications SiUS092230E Ceiling Cassette Type Indoor Unit FFQ09W2VJU9 FFQ12W2VJU9 Model RX09WMVJU9 RX12WMVJU9 Outdoor Unit Cooling Cooling 3.94 - 3.56 3.74 - 3.38 5.01 - 4.53 5.45 - 4.93 758 - 758 698 - 698 939 - 939 1,081 - 1,081 92.5 - 92.5 89.7 - 89.9 90.1 - 90.1...
Page 27 SiUS092230E Specifications Indoor Unit FFQ15W2VJU9 FFQ18W2VJU9 Model RX15WMVJU9 RX18WMVJU9 Outdoor Unit Cooling Cooling 6.34 - 5.73 6.80 - 6.15 7.74 - 7.00 10.70 - 9.68 1,252 - 1,252 1,349 - 1,349 1,513 - 1,513 2,110 - 2,110 94.9 - 95.0 95.4 - 95.4 94.0 - 94.0 94.8 - 94.8...
Page 28 SiUS092230E Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................23 1.1 FTXR09/12/18WVJUW(S)9................ 23 1.2 FDMQ09/12/15/18/24WVJU9..............25 1.3 FFQ09/12/15/18W2VJU9 ................27 2. Sensor Kit for FFQ Series .................28 2.1 BRYQ60A2W(S)..................28 3. Wired Remote Controller................29 3.1 BRC1E73 ....................29 4.
Page 29 SiUS092230E Indoor Unit 1. Indoor Unit FTXR09/12/18WVJUW(S)9 Control PCB Connector for centralized control (HA) (A1P) Connector for INTELLIGENT EYE sensor PCB (A3P) Wire harness for indoor heat exchanger thermistor (R2T) Connector for swing motors Wire harness for reduction motor (front panel mechanism) and limit switch Connector for display/signal receiver PCB (A2P) S200...
Page 30 Indoor Unit SiUS092230E Display/Signal Connector for control PCB (A1P) Receiver PCB Connector for room temperature thermistor (R1T) (A2P) Indoor unit ON/OFF switch LED for operation (multi-color) LED for INTELLIGENT EYE (green) Address setting jumper Refer to page 210 for details. 3P357402-2 Caution Replace the PCB if you cut a jumper unintentionally.
Page 31 SiUS092230E Indoor Unit FDMQ09/12/15/18/24WVJU9 Control PCB X15A Connector for float switch (A1P) X16A Connector for room temperature thermistor (suction air thermistor) (R1T) X17A, X18A Connector for indoor heat exchanger thermistor (R2T, R3T) X25A Connector for drain pump motor X27A Connector for terminal block (for power supply) X28A Connector for power supply wiring (option) X30A...
Page 32 Indoor Unit SiUS092230E Indoor Fan PCB Connector for control PCB (A1P) (A2P) Connector for reactor Connector for DC fan motor X10A Connector for terminal block (for power supply) Fuse (5 A, 250 V) Fuse (6.3 A, 250 V) LED for service monitor (green) X10A 2P442228-16 2P442228-17...
Page 33 SiUS092230E Indoor Unit FFQ09/12/15/18W2VJU9 Control PCB X15A Connector for float switch (A1P) X16A Connector for room temperature thermistor (suction air thermistor) X17A, X18A Connector for indoor heat exchanger thermistor X20A Connector for DC fan motor X24A Connector for transmitter board (when the wireless remote controller (option) is used) X25A Connector for drain pump motor...
Page 34 Sensor Kit for FFQ Series SiUS092230E 2. Sensor Kit for FFQ Series BRYQ60A2W(S) Outline Thermopile sensor (A4P) Pyroelectric sensor (A5P) (R25074) Thermopile Sensor (A4P) Connector 3P262610-1 Pyroelectric Sensor (A5P) Connector 3P262611-1 Part 3 Printed Circuit Board Connector Wiring Diagram...
Page 35 SiUS092230E Wired Remote Controller 3. Wired Remote Controller BRC1E73 Wired Remote P1, P2 Terminal for indoor unit Controller PCB Room temperature thermistor 2P619817-7 Part 3 Printed Circuit Board Connector Wiring Diagram...
Page 36 Wireless Remote Controller Receiver for FDMQ Series SiUS092230E 4. Wireless Remote Controller Receiver for FDMQ Series BRC082A43 Wired Remote MAIN/SUB setting switch Controller PCB Refer to page 218 for details. Address setting switch Refer to page 218 for details. P1, P2 Terminal for indoor unit control PCB (A1P) 3P431101-2 Part 3 Printed Circuit Board Connector Wiring Diagram...
Page 37 SiUS092230E Wireless Remote Controller Kit for FFQ Series 5. Wireless Remote Controller Kit for FFQ Series BRC082A41W, BRC082A42W(S) Transmitter Connector for receiver (A3P) Board (A2P) Connector for control PCB (A1P) MAIN/SUB setting switch Refer to page 221 for details. Address setting switch Refer to page 221 for details.
Page 38 Outdoor Unit SiUS092230E 6. Outdoor Unit RX09/12WMVJU9 Main PCB (PCB1) Connector for electronic expansion valve coil Connector for compressor Connector for overload protector and high pressure switch Connector for DC fan motor Connector for four way valve coil Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe) HL1, HN1, S Wire harness for terminal block...
Page 39 SiUS092230E Outdoor Unit HL1, HN1, S V150 E1, E2 LED A 2P504947-93 Caution Replace the PCB if you cut a jumper unintentionally. Jumpers are necessary for electronic circuit. Improper operation may occur if you cut any of them. Part 3 Printed Circuit Board Connector Wiring Diagram...
Page 40 Outdoor Unit SiUS092230E RX15/18/24WMVJU9 Main PCB Connector for electronic expansion valve coil Connector for overload protector and high pressure switch Connector for DC fan motor Connector for four way valve coil Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe) HL1, HN1, S Wire harness for terminal block E1, E2...
Page 41 SiUS092230E Outdoor Unit HL1, HN1, S E1, E2 LED A U, V, W 2P443814-57 2P443814-58 Caution Replace the PCB if you cut a jumper unintentionally. Jumpers are necessary for electronic circuit. Improper operation may occur if you cut any of them. Part 3 Printed Circuit Board Connector Wiring Diagram...
Page 42 SiUS092230E Part 4 Functions and Control 1. Common Functions ...................38 1.1 Temperature Control .................. 38 1.2 Frequency Principle..................38 2. Functions for FTXR Series................40 2.1 Airflow Direction Control................40 2.2 Fan Speed Control for Indoor Unit ............. 41 2.3 Program Dry Operation ................42 2.4 Automatic Cooling/Heating Changeover ............
Page 43 SiUS092230E 5.10 Liquid Compression Protection Function............ 87 5.11 Defrost Control ................... 88 5.12 Electronic Expansion Valve Control ............89 5.13 Malfunctions ....................92 Part 4 Functions and Control...
Page 44 Common Functions SiUS092230E 1. Common 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 45 SiUS092230E Common Functions  When the frequency increases, the rotation speed of the compressor increases resulting in an increase of refrigerant circulation. This leads to a larger amount of heat exchange per unit.  When the frequency decreases, the rotation speed of the compressor decreases resulting in a decrease of refrigerant circulation.
Page 46 Functions for FTXR Series SiUS092230E 2. Functions for FTXR Series 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.
Page 47 SiUS092230E Functions for FTXR Series 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 48 Functions for FTXR Series SiUS092230E Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and FAN setting buttons are inoperable. Details The microcomputer automatically sets the temperature and airflow rate.
Page 49 SiUS092230E Functions for FTXR Series 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 50 Functions for FTXR Series SiUS092230E 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 ...
Page 51 SiUS092230E Functions for FTXR Series 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 52 Functions for FTXR Series SiUS092230E 2-Area INTELLIGENT EYE Operation Outline The following functions can be performed by the microcomputer and a motion sensor. 1. Reduction of the capacity when there is nobody in the room in order to save electricity (energy saving operation) 2.
Page 53 SiUS092230E Functions for FTXR Series 2. Motions (in cooling) within within 20 min. within 20 min. 20 min. 20 min. Detection signal Reset Reset Reset 1 ~ 2°C (1.8 ~ 3.6 °F) Target temperature Remote controller Sensor button Operation Set speed Set speed 60 rpm Fan speed (#)
Page 54 Functions for FTXR Series SiUS092230E 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 55 SiUS092230E Functions for FTXR Series 2.10 Multi-Monitor Lamp/TIMER Lamp Features Current operation mode is displayed in color of the lamp of the indoor unit. Operating status can be monitored even in automatic operation in accordance with the actual operation mode. Multi-monitor lamp/ TIMER lamp (R19925)
Page 56 Functions for FTXR Series SiUS092230E 2.11 Clock Setting ARC466 Series The clock can be set by taking the following steps: 1. Press Clock button. 0:00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 57 SiUS092230E Functions for FTXR Series 2.12 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 58 Functions for FTXR Series SiUS092230E 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°C)
Page 59 SiUS092230E Functions for FTXR Series 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 60 Functions for FTXR Series SiUS092230E 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°C)
Page 61 SiUS092230E Functions for FTXR Series Confirming a reservation • The reservation can be confirmed. Setting Displays Normal Confirmation Press • The day of the week and the reservation number of the current day will be displayed. Press to select the day of the week and the reservation number to be confirmed.
Page 62 Functions for FTXR Series SiUS092230E 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 63 SiUS092230E Functions for FTXR Series 2.13 Other Functions 2.13.1 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 64 Functions for FDMQ/FFQ Series SiUS092230E 3. Functions for FDMQ/FFQ Series Airflow Direction Control Applicable FFQ09/12/15/18W2VJU9 Models Outline There are two types of airflow direction settings.  Automatic swing setting The flaps automatically oscillate up and down. Indoor unit (Automatic swing) (Automatic swing) (R24069) ...
Page 65 SiUS092230E Functions for FDMQ/FFQ Series Fan Speed Control for Indoor Unit  With Wired Remote Controller (BRC1E73) To change the fan speed, press Fan Speed button and select the fan speed from Low/Medium/High/Auto.  Auto cannot be selected if the indoor unit does not have Auto Fan speed function. ...
Page 66 Functions for FDMQ/FFQ Series SiUS092230E Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and FAN setting buttons are inoperable. Details The microcomputer automatically sets the temperature and airflow rate.
Page 67 SiUS092230E Functions for FDMQ/FFQ Series Clock and Calendar Setting (With BRC1E73) Press Menu/OK button to display the main menu screen. Press buttons to select Clock & Calendar on the main menu screen. Press Menu/OK button to display the clock & calendar screen. Press buttons to select Date &...
Page 68 Functions for FDMQ/FFQ Series SiUS092230E Select Hour with buttons. Change the hour with buttons. Holding down the button causes the number to change continuously. Select Minute with buttons. Change the minute with buttons. Holding down the button causes the number to change continuously. Press Menu/OK button.
Page 69 SiUS092230E Functions for FDMQ/FFQ Series Schedule Timer Operation (With BRC1E73) Outline Day settings are selected from 4 patterns:  7 Days  Weekday/Sat/Sun  Weekday/Weekend  Everyday Up to 5 actions can be set for each day. Details Set the startup time and operation stop time. Startup time, cooling and heating temperature setpoints can be configured.
Page 70 Functions for FDMQ/FFQ Series SiUS092230E  Daily Patterns The schedule screen will appear. Press buttons to select Daily Patterns on the schedule screen. The daily patterns screen will appear when Menu/OK button is pressed. Press buttons to select 7 Days Weekday/Sat/Sun Weekday/Weekend Everyday...
Page 71 SiUS092230E Functions for FDMQ/FFQ Series  Settings The schedule screen will appear. Press buttons to select Settings on the schedule screen. The settings screen will appear when Menu/OK button is pressed. Press buttons to select the day to be set. * It cannot be selected in the case of EVDY Input the time for the selected day.
Page 72 Functions for FDMQ/FFQ Series SiUS092230E Press buttons to move the highlighted item and press buttons to configure ON/OFF/-- settings. --, ON, or OFF changes in sequence when buttons are pressed. ON: The temperature setpoints can be configured. OFF: The setback temperature setpoints can be configured.
Page 73 SiUS092230E Functions for FDMQ/FFQ Series  Enabling or disabling the schedule Display the schedule screen. Press buttons to select Enable / Disable on the schedule screen. Press Menu/OK button to display the enable/disable screen. Press buttons to select Enable Disable on the enable/disable screen.
Page 74 Functions for FDMQ/FFQ Series SiUS092230E Drain Pump Control Normal Operation Float switch Thermostat (running) Error display Drain pump (R24037)  The float switch is ON in normal operation.  When cooling operation starts (thermostat ON), the drain pump turns ON simultaneously. ...
Page 75 SiUS092230E Functions for FDMQ/FFQ Series If Float Switch is OFF with Thermostat OFF in Cooling Operation Float switch Thermostat (running) Error display Drain pump 5 sec. 5 min. 5 sec. 5 min. 5 sec. 5 min. (R24611)  When the float switch stays OFF for 5 sec., the drain pump turns ON. ...
Page 76 Functions for FDMQ/FFQ Series SiUS092230E Hot Start Control (In Heating Operation Only) Outline At startup with thermostat ON or after the completion of defrosting in heating operation, the indoor unit fan is controlled to prevent cold air from blasting out and ensure startup capacity. Details Defrost ending or oil return ending Hot start ending conditions...
Page 77 SiUS092230E Functions for FDMQ/FFQ Series Presence and Floor Sensors (Option) Applicable FFQ09/12/15/18W2VJU9 Models Outline With the human presence signal and the floor temperature signal from the optional sensor kit, the system provides the energy saving control, or the comfortable temperature control and airflow direction control preventing the direct draft to the human.
Page 78 Functions for FDMQ/FFQ Series SiUS092230E 2. Auto-setback by sensor (with presence sensor) After pre-determined time has elapsed without detection of human presence, the unit automatically shifts the target temperature gradually for energy saving. The target temperature displayed on the remote controller remains same as the initial set value during the above change of target temperature.
Page 79 SiUS092230E Functions for FDMQ/FFQ Series 3. Auto-off by sensor (with presence sensor) After pre-determined time has elapsed without detection of human presence, the unit automatically stops operation. The auto-off time can be set between 1- 24 hours by the hour. Once the unit stops operation by auto-off function, the system would not restart even if the human is detected again.
Page 80 Functions for FDMQ/FFQ Series SiUS092230E 4. Room temperature adjustment by sensing (with floor sensor) The system uses living space temperature calculated from temperatures detected by room temperature thermistor (suction air thermistor in the indoor unit) and floor sensor, as the target temperature.
Page 81 SiUS092230E Functions for FDMQ/FFQ Series FFQ Series Emergency operation switch (R24077) Part 4 Functions and Control...
Page 82 Thermistor Functions SiUS092230E 4. Thermistor Functions (3) Outdoor (5) Room Temperature Temperature Expansion valve Thermistor Thermistor (2) Outdoor Heat Exchanger Thermistor Four way valve (4) Indoor Heat Exchanger (1) Discharge Pipe Thermistor Thermistor Compressor (R23851) (1) Discharge  The discharge pipe thermistor is used for controlling discharge pipe temperature. If the Pipe Thermistor discharge pipe temperature (used in place of the inner temperature of the compressor) rises abnormally, the operating frequency becomes lower or the operation halts.
Page 83 SiUS092230E Control Specification 5. 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 84 Control Specification SiUS092230E 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 85 SiUS092230E 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 86 Control Specification SiUS092230E 5.3.2 Four Way Valve Switching Outline The four way valve coil is energized/not energized depending on the operation mode. (Heating: ON, Cooling/Dry/Defrost: OFF) In order to eliminate the switching sound as the four way valve coil switches from ON to OFF when the heating is stopped, the OFF delay switch of the four way valve is carried out.
Page 87 SiUS092230E Control Specification 5.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. The function is not used when defrosting. (Hz) Frequency (sec.) Time (R23251) 09/12 class 15/18/24 class A (Hz) B (Hz) C (Hz)
Page 88 Control Specification SiUS092230E 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 89 SiUS092230E 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 90 Control Specification SiUS092230E 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 (602 psi) Pressure Condensing...
Page 91 SiUS092230E Control Specification 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 ...
Page 92 Control Specification SiUS092230E  FFQ The operating frequency limitation is judged with the indoor heat exchanger temperature. Indoor heat exchanger temperature (R2T) 13°C (55.4°F) Reset zone 7°C (44.6°F) Up zone 5°C (41.0°F) Keep zone 3°C (37.4°F) Dropping zone 0°C (32.0°F) Stop zone R4003916 Heating Peak-cut Control...
Page 93 SiUS092230E Control Specification Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF control during defrosting The outdoor fan is turned OFF while defrosting.
Page 94 Control Specification SiUS092230E 5.11 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 95 SiUS092230E Control Specification 5.12 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 96 Control Specification SiUS092230E 5.12.1 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. 5.12.2 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 97 SiUS092230E Control Specification 5.12.7 Discharge Pipe Thermistor Disconnection Control Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensation temperature. If the discharge pipe thermistor is disconnected, the electronic expansion valve opens according to the outdoor temperature and the operation frequency, operates for a specified time, and then stops.
Page 98 Control Specification SiUS092230E 5.12.8 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 99 SiUS092230E Part 5 Remote Controller 1. Applicable Remote Controller ..............94 2. ARC466A36 ....................95 3. BRC082A43 ....................97 4. BRC082A41W, BRC082A42W(S)............. 99 5. BRC944B2 ....................101 6. BRC1E73 ....................102 Part 5 Remote Controller...
Page 100 FFQ15W2VJU9 FFQ18W2VJU9 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 101 SiUS092230E ARC466A36 2. ARC466A36 Signal transmitter Receiver 19-11/16" Display (LCD) (50 cm) or more • Displays the current settings. (In this illustration, each section is shown with all its displays on for the • T o use the remote controller, aim the purpose of explanation.) transmitter at the indoor unit.
Page 102 ARC466A36 SiUS092230E Open the Front Cover Mode button • Selects the operation mode. AUTO COOL HEAT 4 Econo / Quiet button • Every time you press Econo/Quiet button, the setting changes in the following order. Lamp brightness ECONO QUIET setting button OUTDOOR UNIT •...
Page 103 SiUS092230E BRC082A43 3. BRC082A43 ON OFF ON OFF TEMP TIME DOWN DOWN RESERVE CANCEL TIMER MODE TEST TEST TEST The situation which opened the front cover of the remote control (R25006) (R25007) Part 5 Remote Controller...
Page 104 BRC082A43 SiUS092230E TIMER MODE START/STOP BUTTON DISPLAY “ ” “ I ” (SIGNAL TRANSMISSION) Use this button for TIMER MODE setting. This lights up when a signal is being transmitted. TIMER RESERVE/CANCEL BUTTON DISPLAY “ ” “ ” “ ” “ ”...
Page 105 SiUS092230E BRC082A41W, BRC082A42W(S) 4. BRC082A41W, BRC082A42W(S) (R23936) (R23937) Part 5 Remote Controller...
Page 106 BRC082A41W, BRC082A42W(S) SiUS092230E TIMER MODE START/STOP BUTTON DISPLAY (SIGNAL TRANSMISSION) TIMER RESERVE/CANCEL BUTTON This lights up when a signal is being transmitted. AIRFLOW DIRECTION ADJUST BUTTON DISPLAY OPERATION MODE SELECTOR BUTTON (OPERATION MODE) Press this button to select OPERATION MODE. This display shows the current OPERATION MODE.
Page 107 SiUS092230E BRC944B2 5. BRC944B2 R5000214 Caution This remote controller cannot be used together with a standard wireless remote controller. Otherwise, what appears on this remote controller's display may fail to correspond to actual operating conditions. Part 5 Remote Controller...
Page 108 BRC1E73 SiUS092230E 6. BRC1E73 1. Operation mode selector button 11. LCD (with backlight) 4. Up button 5. Down button 6. Right button 7. Left button 9. Operation lamp 8. On/Off button 3. Menu/OK button 10. Cancel button 2. Fan speed control button Part 5 Remote Controller...
Page 109 SiUS092230E BRC1E73 1. Operation mode selector button 7. Left button Press this button to select the operation Used to highlight the next items on the • • mode of your preference. left-hand side. * Available modes vary with the indoor unit Each screen is scrolled in the left-hand •...
Page 110 BRC1E73 SiUS092230E Liquid Crystal Display • Three types of display mode (Standard, Detailed and Simple) are available. • Standard display is set by default. • Detailed and Simple displays can be selected in the main menu. Standard display 10.Changeover controlled 11.Setback by the master indoor unit 9.Under centralized...
Page 111 SiUS092230E BRC1E73 Simple display 1.Operation mode 14.Selectable Display Item 3.Setpoint 11.Setback 2.Fan speed 4.Stand by for Defrost/ <Simple display example> Hot start Note for all display modes • Depending on the field settings, while the indoor unit is stopped, OFF may be displayed instead of the operation mode and/or the setpoint may not be displayed.
Page 112 BRC1E73 SiUS092230E 1. Operation mode “Error: Push Menu button” “Warning: Push Menu button” Used to display the current operation • Displayed if an error or warning is detected. • mode: Cool, Heat, Vent, Fan, Dry or Auto. In Auto mode, the actual operation mode •...
Page 113 SiUS092230E BRC1E73 11. Setback “ ” The setback icon flashes when the unit is • turned on by the setback control. 12. Airflow Direction “ ” Displayed when the airflow direction and • swing are set. If the connected indoor unit model does not •...
Page 114 SiUS092230E Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items ........110 2. Troubleshooting with LED ...............111 2.1 Indoor Unit....................111 2.2 Outdoor Unit ..................... 113 3. Service Diagnosis ...................114 3.1 ARC466 Series..................114 3.2 BRC1E73 ....................117 3.3 BRC082A43, BRC082A41W, BRC082A42W(S)........119 4.
Page 115 SiUS092230E 7.5 Compressor Lock ..................165 7.6 DC Fan Lock .................... 166 7.7 Input Overcurrent Detection ..............167 7.8 Four Way Valve Abnormality..............169 7.9 Discharge Pipe Temperature Control............171 7.10 High Pressure Control in Cooling ............. 172 7.11 System Shutdown due to Temperature Abnormality in the Compressor..................
Page 116 General Problem Symptoms and Check Items SiUS092230E 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 117 SiUS092230E Troubleshooting with LED 2. Troubleshooting with LED Indoor Unit Operation Lamp Check the interval time between blinks of the OPERATION lamp.  FTXR Series Blink every 2 to 3 seconds If the operation mode is different from the operation mode of the indoor unit in another room, the OPERATION lamp may blink and operation may not be performed, or operation may stop while in progress.
Page 118 Troubleshooting with LED SiUS092230E  FDMQ Series with BRC082A43 Wireless Remote Controller In case of wireless remote controller, a receiver is installed. When the error occurs, the operation lamp on the receiver blinks. Operation lamp (red) R4003517  FFQ Series with BRC082A41W, BRC082A42W(S) Wireless Remote Controller In case of wireless remote controller, a transmitter board (A2P) and a receiver (A3P) are installed on indoor unit.
Page 119 SiUS092230E Troubleshooting with LED Outdoor Unit The outdoor unit has one green LED (LED A) on the PCB. When the microcomputer works in order, the LED A blinks. However, the LED A turns OFF while the standby electricity saving function is activated and the power supply is OFF.
Page 120 Service Diagnosis SiUS092230E 3. Service Diagnosis ARC466 Series 3.1.1 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 121 SiUS092230E Service Diagnosis 3.1.2 Method 2 1. Press the center of Temp button and Mode button at the same time. (R24046) SC is displayed on the LCD. R6000375 2. Select SC (service check) with Temp or Temp button. 3. Press Mode button to enter the service check mode. (R24047) The left-side number blinks.
Page 122 Service Diagnosis SiUS092230E  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 123. 6. Press Mode button. (R24047) The right-side number blinks. (R11673) 7.
Page 123 SiUS092230E Service Diagnosis BRC1E73 Relations On power-up, the message “Checking the connection. Please standby.” will be displayed on the Between Modes remote controller screen temporarily and then 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 remain lit for about 30 seconds.
Page 124 The error code will flash and the service Error Code: A1 Contact Info contact and model name or code may 0123-456-7890 be displayed. Indoor Model ---/000 Notify your Daikin dealer of the Error Outdoor Model ---/000 code and model name or code. Part 6 Service Diagnosis...
Page 125 SiUS092230E Service Diagnosis BRC082A43, BRC082A41W, BRC082A42W(S) Relations The following modes can be selected by using INSPECTION/TEST OPERATION button on the Between Modes remote controller. Service data can be obtained. Indoor unit settings can be made. Press INSPECTION/TEST z Error code history z Filter cleaning sign time OPERATION button for Field...
Page 126 Service Diagnosis SiUS092230E Step Action Press UP or DOWN button and change the UNIT No. until the indoor unit starts to beep. UP button DOWN button (R15408) If you hear... Then... 3 short beeps Follow all steps below. o l l operation in step 4 until you hear a long beep.
Page 127 SiUS092230E Service Diagnosis Step Action Press UP or DOWN button to change the error code upper digit until the indoor unit beeps. DOWN UP button DOWN button (R15411) If you hear... Then... 2 short beeps The upper digit matches. s t i s t i Press OPERATION MODE SELECTOR button.
Page 128 Service Diagnosis SiUS092230E Step Action Press UP or DOWN button and change the error code lower digit until the indoor unit generates long beep. DOWN UP button DOWN button (R15413) If you hear... Then... 2 short beeps No digits match. s t i Press OPERATION MODE SELECTOR button to return to the normal mode.
Page 129 SiUS092230E Error Codes and Description 4. Error Codes and Description Reference Page Error Description Codes FTXR FDMQ System Normal — — — U0 Refrigerant shortage — — — Low-voltage detection or over-voltage detection Signal transmission error (between indoor unit and outdoor unit) Signal transmission error —...
Page 130 Troubleshooting for FTXR Series SiUS092230E 5. Troubleshooting for FTXR Series 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 ...
Page 131 SiUS092230E Troubleshooting for FTXR Series Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Combination of the indoor and outdoor Match the compatible unit matched? models. To secure the connection, Check the connection of disconnect the connectors once connectors/wire harness.
Page 132 Troubleshooting for FTXR Series SiUS092230E 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. ...
Page 133 SiUS092230E Troubleshooting for FTXR Series Indoor Fan Motor (DC Motor) or Related Abnormality Error Code Method of Error The rotation speed detected by the Hall IC during indoor fan motor operation determines abnormal Detection fan motor operation. Error Decision The detected rotation speed does not reach the demanded rotation speed of the target tap, and is Conditions less than 50% of the maximum fan motor rotation speed.
Page 134 Troubleshooting for FTXR Series SiUS092230E 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 within ±10% from supply.
Page 135 SiUS092230E Troubleshooting for FTXR Series Note The rotation pulse is the feedback signal from the indoor fan motor. Reference Check No.02 Refer to P.189 Part 6 Service Diagnosis...
Page 136 Troubleshooting for FTXR Series SiUS092230E 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 137 SiUS092230E Troubleshooting for FTXR Series Front Panel Open/Close Fault Error Code Error Decision If the error repeats, the system is shut down. Conditions Supposed  Defective reduction motor Causes  Malfunction or deterioration of the front panel mechanism  Defective limit switch Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Page 138 Troubleshooting for FTXR Series SiUS092230E Low-voltage Detection or Over-voltage Detection Error Code Method of Error Low-voltage detection: 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. Error Decision Low-voltage detection: Conditions...
Page 139 SiUS092230E Troubleshooting for FTXR Series 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 140 Troubleshooting for FTXR Series SiUS092230E 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 141 SiUS092230E Troubleshooting for FTXR Series 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 indoor unit - outdoor unit connection wires.
Page 142 Troubleshooting for FTXR Series SiUS092230E 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.
Page 143 SiUS092230E Troubleshooting for FDMQ, FFQ Series 6. Troubleshooting for FDMQ, FFQ Series Indoor Unit PCB Abnormality Error Code Method of Error The system checks the data from EEPROM. Detection Error Decision When the data from the EEPROM is not received correctly Conditions EEPROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds its content without power.
Page 144 Troubleshooting for FDMQ, FFQ Series SiUS092230E Drain Level Control System Abnormality Error Code Method of Error The float switch detects error. Detection Error Decision When the water level reaches its upper limit and when the float switch turns OFF Conditions Supposed ...
Page 145 SiUS092230E Troubleshooting for FDMQ, FFQ Series Indoor Fan Motor or Related Abnormality 6.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable FDMQ09/12/15/18/24WVJU9 Models Error Code Method of Error  Detection from the current flow on the fan PCB Detection ...
Page 146 Troubleshooting for FDMQ, FFQ Series SiUS092230E Continued from the previous page Turn ON the power supply while the fan motor connector ( 1) is disconnected. The HAP lamp on the indoor unit control PCB is blinking while the HAP lamp on the fan PCB is not blinking.
Page 147 SiUS092230E Troubleshooting for FDMQ, FFQ Series 6.3.2 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable FFQ09/12/15/18W2VJU9 Models Error Code Method of Error The rotation speed detected by the Hall IC during indoor fan motor operation determines abnormal Detection fan motor operation. Error Decision The fan motor is not revved up.
Page 148 Troubleshooting for FDMQ, FFQ Series SiUS092230E 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 Correct the power ±10% from the rated supply.
Page 149 SiUS092230E Troubleshooting for FDMQ, FFQ Series Reference Check No.02 Refer to P.189 Part 6 Service Diagnosis...
Page 150 Troubleshooting for FDMQ, FFQ Series SiUS092230E Indoor Fan PCB Abnormality Applicable FDMQ09/12/15/18/24WVJU9 Models Error Code Method of Error Microcomputer checks the voltage state of the fan PCB. Detection Error Decision Overvoltage or voltage drop is detected on the fan PCB. Conditions Supposed ...
Page 151 SiUS092230E Troubleshooting for FDMQ, FFQ Series Humidifier or Related Abnormality Error Code Method of Error Water leakage from humidifier(s) is detected based on the float switch ON/OFF changeover while Detection the system is not operating. Error Decision The float switch changes from ON to OFF while the system is OFF Conditions Supposed ...
Page 152 Troubleshooting for FDMQ, FFQ Series SiUS092230E Thermistor or Related Abnormality C4, C5, C9 Error Code Method of Error The temperatures detected by the thermistors determine thermistor errors. Detection Error Decision The thermistor is disconnected or shorted while the unit is running. Conditions Supposed ...
Page 153 SiUS092230E Troubleshooting for FDMQ, FFQ Series Presence Sensor or Floor Sensor Abnormality Applicable FFQ09/12/15/18W2VJU9 Models Error Code Method of Error The system detects abnormality by the output signal from the sensor(s). Detection Error Decision The sensor is disconnected or shorted while the unit is running. Conditions Supposed ...
Page 154 Troubleshooting for FDMQ, FFQ Series SiUS092230E Remote Controller Thermistor Abnormality Error Code Method of Error Even if remote controller thermistor is faulty, system is possible to operate by system thermistor. Detection Malfunction detection is carried out by the temperature detected by the remote controller thermistor.
Page 155 SiUS092230E Troubleshooting for FDMQ, FFQ Series Low-voltage Detection or Over-voltage Detection Error Code Method of Error Low-voltage detection: 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. Error Decision Low-voltage detection: Conditions...
Page 156 Troubleshooting for FDMQ, FFQ Series SiUS092230E 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 157 SiUS092230E Troubleshooting for FDMQ, FFQ Series 6.10 Signal Transmission Error (Between Indoor and Outdoor Unit) Error Code Method of Error The signal transmission data 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 158 Troubleshooting for FDMQ, FFQ Series SiUS092230E 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 wires between the indoor unit and the...
Page 159 SiUS092230E Troubleshooting for FDMQ, FFQ Series 6.11 Signal Transmission Error (Between Indoor Unit and Remote Controller) Error Code Method of Error In case of controlling 1 indoor unit with 2 remote controllers, check the system using microcomputer Detection if signal transmission between indoor unit and remote controller (main and sub) is normal. Error Decision Normal transmission does not continue for specified period.
Page 160 Troubleshooting for FDMQ, FFQ Series SiUS092230E 6.12 Signal Transmission Error (Between MAIN/SUB Remote Controllers) Error Code Method of Error In case of controlling 1 indoor unit with 2 remote controllers, check the system using microcomputer Detection if signal transmission between MAIN remote controller and SUB remote controller is normal. Error Decision Normal transmission does not continue for specified period.
Page 161 SiUS092230E Troubleshooting for FDMQ, FFQ Series 6.13 Unspecified Voltage (Between Indoor Unit and Outdoor Unit) Error Code Error Decision Improper combination of indoor and outdoor units Conditions Supposed  Defective indoor unit PCB Causes  Indoor-outdoor unit transmission wiring error ...
Page 162 Troubleshooting for Outdoor Unit SiUS092230E 7. Troubleshooting for Outdoor Unit 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 ...
Page 163 SiUS092230E Troubleshooting for Outdoor Unit Actuation of High Pressure Switch Applicable RX15/18/24WMVJU9 Models 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 (602 psi) Conditions ...
Page 164 Troubleshooting for Outdoor Unit SiUS092230E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Open the stop valve. Stop valve open? High pressure switch Reconnect the connector. connector S40 properly connected? Disconnect the connector S40 from the PCB.
Page 165 SiUS092230E Troubleshooting for Outdoor Unit OL Activation (Compressor Overload) or HPS Activation (High Pressure Switch) Applicable RX09/12WMVJU9 Models Error Code Method of Error A compressor overload is detected through compressor OL. Detection Abnormality is detected when the contact of the high pressure switch opens. Error Decision ...
Page 166 Troubleshooting for Outdoor Unit SiUS092230E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Thermistor Insert the thermistor in disconnected? Discharge pipe thermistor position. Indoor heat exchanger thermistor Outdoor heat exchanger thermistor Is the connector S40 Connect the connector S40 properly connected?
Page 167 SiUS092230E Troubleshooting for Outdoor Unit Note(s) OL (Q1L) activating temperature: 130°C (266°F) OL (Q1L) recovery temperature: 95°C (203°F) High pressure switch (S1PH) activating pressure: 602 psi (4.15 MPa) High pressure switch (S1PH) recovery pressure: 464 psi (3.2 MPa) Reference Check No.01 Refer to P.188 Reference Check No.12 Refer to P.191 Reference...
Page 168 Troubleshooting for Outdoor Unit SiUS092230E OL Activation (Compressor Overload) Applicable RX15/18/24WMVJU9 Models 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 169 SiUS092230E Troubleshooting for Outdoor Unit 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 170 Troubleshooting for Outdoor Unit SiUS092230E Reference Check No.13 Refer to P.192 Reference Check No.14 Refer to P.192 Part 6 Service Diagnosis...
Page 171 SiUS092230E Troubleshooting for Outdoor Unit 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 172 Troubleshooting for Outdoor Unit SiUS092230E 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 173 SiUS092230E Troubleshooting for Outdoor Unit 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 12.0 ~ 12.5 A (depending on the model) for 2.5 seconds with the Conditions compressor running.
Page 174 Troubleshooting for Outdoor Unit SiUS092230E 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 175 SiUS092230E Troubleshooting for Outdoor Unit 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 10 minutes after operating for 5 minutes.
Page 176 Troubleshooting for Outdoor Unit SiUS092230E 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 177 SiUS092230E Troubleshooting for Outdoor Unit 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 178 Troubleshooting for Outdoor Unit SiUS092230E 7.10 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 The temperature sensed by the outdoor heat exchanger thermistor rises above 57.5 ~ 60°C (135.5 Conditions...
Page 179 SiUS092230E Troubleshooting for Outdoor Unit 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 180 Troubleshooting for Outdoor Unit SiUS092230E 7.11 System Shutdown due to Temperature Abnormality in the 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 181 SiUS092230E Troubleshooting for Outdoor Unit 7.12 Compressor Sensor System 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 182 Troubleshooting for Outdoor Unit SiUS092230E 7.13 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 183 SiUS092230E Troubleshooting for Outdoor Unit 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.
Page 184 Troubleshooting for Outdoor Unit SiUS092230E Reference Check No.15 Refer to P.193 Reference Check No.18 Refer to P.197 Reference Check No.20 Refer to P.198 Part 6 Service Diagnosis...
Page 185 SiUS092230E Troubleshooting for Outdoor Unit 7.14 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 186 Troubleshooting for Outdoor Unit SiUS092230E 7.15 Thermistor or Related Abnormality (Outdoor Unit) H9, J3, J6, P4 Error Code Method of Error This fault is identified based on the thermistor input voltage to the microcomputer. Detection A thermistor fault is identified based on the temperature sensed by each thermistor. Error Decision ...
Page 187 SiUS092230E Troubleshooting for Outdoor Unit Troubleshooting In case of H9, J3, J6 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 Reconnect the connectors again on remote or thermistors.
Page 188 Troubleshooting for Outdoor Unit SiUS092230E 7.16 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 189 SiUS092230E Troubleshooting for Outdoor Unit 7.17 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 190 Troubleshooting for Outdoor Unit SiUS092230E 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?
Page 191 SiUS092230E Troubleshooting for Outdoor Unit 7.18 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 192 Troubleshooting for Outdoor Unit SiUS092230E 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 193 SiUS092230E Troubleshooting for Outdoor Unit Reference Check No.15 Refer to P.193 Reference Check No.17 Refer to P.197 Reference Check No.18 Refer to P.197 Reference Check No.22 Refer to P.200 Part 6 Service Diagnosis...
Page 194 Check SiUS092230E 8. 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 195 SiUS092230E Check Indoor Fan Motor Connector Check Check No.02 FTXR Series 1. Check the connection of connector. 2. Check motor power supply voltage output (pins 4 - 7). 3. Check motor control voltage (pins 4 - 3). 4. Check rotation command voltage output (pins 4 - 2). 5.
Page 196 Check SiUS092230E FFQ Series 1. Check the connection of connector. 2. Check motor power supply voltage output (pins 5 - 8). 3. Check motor control voltage (pins 5 - 4). 4. Check rotation command voltage output (pins 5 - 3). X20A Motor power supply voltage (290 ~ 330 VDC) Unused...
Page 197 SiUS092230E Check 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 198 Check SiUS092230E Four Way Valve Performance Check Check No.13 Turn off the power. Then, turn on the power to restart the system. ∗ Four way valve coil Start heating operation. Cooling/Dry/Defrost: Not energized Heating: energized S80 voltage at 208 - 230 VAC with Replace the outdoor unit compressor on? PCB (main PCB).
Page 199 SiUS092230E Check Inverter Analyzer Check Check No.15  Characteristics Inverter analyzer: RSUK0917C If an abnormal stop occurs due to compressor startup failure or overcurrent output when using an inverter unit, it is difficult to judge whether the stop is caused by the compressor failure or some other failure (main PCB, power module, etc.).
Page 200 Check SiUS092230E FTXR Series 1. Turn the power on. 2. Select FAN operation with the Mode button on the remote controller. 3. Press the center of the Temp button and the Mode button at the same time. 4. Select T with the Temp or Temp button. 5.
Page 201 SiUS092230E Check  Diagnose method (Diagnose according to 6 LEDs lighting status.) 1. If all the LEDs are lit uniformly, the compressor is defective.  Replace the compressor. 2. If the LEDs are not lit uniformly, check the power module. ...
Page 202 Check SiUS092230E Outdoor Fan Motor Check Check No.16 Make sure that the voltage is within 320 + 100 VDC. - 50 1. Set operation off and power off. Disconnect the connector S70 or S71. 2. Check that the voltage between the pins 4 - 7 is 320 VDC. 3.
Page 203 SiUS092230E Check Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction. discharge area. Is the discharged air Change the installation short-circuited? location or direction. Is the outdoor heat Clean the outdoor heat exchanger very dirty? exchanger.
Page 204 Check SiUS092230E 8.11 Outdoor Fan System Check Check No.19 DC motor Check the outdoor fan system. Fan motor lead the outdoor fan wire connector Go to Check No. 16. running? disconnected? Outdoor fan system is functioning. Reconnect the connector. (R21195) 8.12 Main Circuit Short Check Check No.20 Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is about...
Page 205 SiUS092230E Check 15/18/24 class Multimeter (R25105) Part 6 Service Diagnosis...
Page 206 Check SiUS092230E 8.13 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 207 SiUS092230E Check 15/18/24 class DC_P1: + (R20704) DC_N1: – Part 6 Service Diagnosis...
Page 208 SiUS092230E Part 7 Trial Operation and Field Settings 1. Pump Down Operation................203 2. Forced Cooling Operation ...............204 3. Trial Operation ..................206 3.1 FTXR Series..................... 206 3.2 FDMQ, FFQ Series .................. 207 4. Field Settings for FTXR Series..............210 4.1 Temperature Display Switch ..............210 4.2 When 2 Units are Installed in 1 Room............
Page 209 SiUS092230E Pump Down Operation 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing of the unit. Details 1. Remove the valve caps from the liquid stop valve and the gas stop valve. 2.
Page 210 Forced Cooling Operation SiUS092230E 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 211 SiUS092230E Forced Cooling Operation FDMQ, FFQ Series With Wired Remote Controller (BRC1E73) 1. Set to COOL operation using the remote Basic screen controller. 2. Press and hold Cancel button for 4 seconds or longer. Service settings menu is Press and hold Cancel displayed.
Page 212 Trial Operation SiUS092230E 3. Trial Operation FTXR Series 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 213 SiUS092230E 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 214 Trial Operation SiUS092230E With BRC1E73 Wired Remote Controller 1. Set to COOL or HEAT operation using the Basic screen remote controller. Cool Set to 2. Press and hold Cancel button for 4 seconds Press and hold Cancel or longer. Service settings menu is button for 4 seconds or displayed.
Page 215 SiUS092230E Trial Operation With BRC082A43, BRC082A41W, BRC082A42W(S) Wireless Remote Controller 1. Press button and select the COOL or HEAT operation. 2. Press button twice. “TEST” is displayed. 3. Press button within 10 seconds, and the test operation starts. Monitor the operation of the indoor unit for a minimum of 10 minutes. During test operation, the indoor unit will continue to cool/heat regardless of the temperature setpoint and room temperature.
Page 216 Field Settings for FTXR Series SiUS092230E 4. Field Settings for FTXR Series 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...
Page 217 SiUS092230E Field Settings for FTXR Series Wireless Remote 1. Slide down the cover and take it off. 2. Cut the address setting jumper J4. Controller  Be careful not to cut the jumper J8. (R25252) Caution Replace the remote controller if you cut a jumper unintentionally. Jumpers are necessary for electronic circuit.
Page 218 Field Settings for FDMQ, FFQ Series SiUS092230E 5. Field Settings for FDMQ, FFQ Series How to Change the Field Settings Outline If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed. Refer to the instruction manual for each optional accessory. Note When using 2 remote controllers for 1 indoor unit, change the field settings from MAIN remote controller.
Page 219 SiUS092230E Field Settings for FDMQ, FFQ Series 3. Highlight the mode, and select desired “Mode No.” by using (Up/Down) button. 4. In the case of setting per indoor unit during group control (When Mode No. such as 20 22 23 25 are selected), highlight the unit No.
Page 220 Field Settings for FDMQ, FFQ Series SiUS092230E BRC082A43, BRC082A41W, BRC082A42W(S) Wireless Remote Controller UP button Mode No. Field setting mode DOWN button First code No. RESERVE button MODE button Second code No. INSPECTION/TEST button (R24061) To set the field settings, you have to change: ...
Page 221 SiUS092230E Field Settings for FDMQ, FFQ Series Overview of Field Settings for FDMQ Series First Second Code No. Mode Code Description of setting Filter cleaning Longlife Approx. Approx. sign interval filter 2,500 1,250 — — — — (used to change hrs.
Page 222 Field Settings for FDMQ, FFQ Series SiUS092230E Overview of Field Settings for FFQ Series First Second Code No. Mode Code Description of setting Filter cleaning Longlife filter Approx. Approx. sign interval — — — — 2,500 hrs. 1,250 hrs. (20) Remote controller thermistor Enabled Disabled...
Page 223 SiUS092230E Field Settings for FDMQ, FFQ Series MAIN/SUB Setting when Using 2 Wired Remote Controllers Outline The MAIN/SUB setting is necessary when 1 indoor unit is controlled by 2 remote controllers. When you use 2 remote controllers, set one to MAIN and the other to SUB. Details 1.
Page 224 Field Settings for FDMQ, FFQ Series SiUS092230E MAIN/SUB and Address Setting for Wireless Remote Controller for FDMQ Series Outline  If setting multiple wireless remote controllers to operate in one room, perform address setting for the receiver and the wireless remote controller. ...
Page 225 SiUS092230E Field Settings for FDMQ, FFQ Series Wireless Remote Factory set is 1. Change the wireless remote controller address setting by the following steps, if necessary. Controller 1. Hold down button and /TEST button at the same time for at least 4 seconds to enter the Address field setting mode.
Page 226 Field Settings for FDMQ, FFQ Series SiUS092230E Multiple Settings When the indoor unit is controlled by an outside controller (central remote controller, etc.), the indoor unit sometimes does not respond to ON/OFF command or temperature setting command A or b from the wireless remote controller.
Page 227 SiUS092230E Field Settings for FDMQ, FFQ Series MAIN/SUB and Address Setting for Wireless Remote Controller for FFQ Series Outline  If setting multiple wireless remote controllers to operate in one room, perform address setting for the receiver and the wireless remote controller. ...
Page 228 Field Settings for FDMQ, FFQ Series SiUS092230E Wireless Remote Factory set is 1. Change the wireless remote controller address setting by the following steps, if necessary. Controller 1. Hold down button and /TEST button at the same time for at least 4 seconds to enter the Address field setting mode.
Page 229 SiUS092230E Field Settings for FDMQ, FFQ Series Multiple Settings When the indoor unit is controlled by an outside controller (central remote controller, etc.), the indoor unit sometimes does not respond to ON/OFF command or temperature setting command A or b from the wireless remote controller.
Page 230 Field Settings for Outdoor Unit SiUS092230E 6. Field Settings for Outdoor Unit Facility Setting (cooling at low outdoor temperature) Outline This function is limited only for facilities (the target of air conditioning is equipment such as computers). Never use it in a residence or office (the space where there is a human). Details ...
Page 231 SiUS092230E Field Settings for Outdoor Unit Warmer Airflow Setting Outline The temperature of discharge airflow in heating operation can be adjusted warmer.  The room temperature will be high when getting close to the set temperature.  The discharge airflow does not become warmer in other than heating operation. Procedure Warmer airflow can be enabled from outdoor unit.
Page 232 Field Settings for Outdoor Unit SiUS092230E Drain Pan Heater In high humidity areas or heavy snow areas, it is recommended to attach a drain pan heater to prevent ice build-up from the bottom frame. 1. Attach the drain pan heater in accordance with the installation manual included with the drain pan heater.
Page 233 SiUS092230E Silicone Grease on Power Transistor/Diode Bridge 7. Silicone Grease on Power Transistor/Diode Bridge Outline Apply the specified silicone grease to the heat generation part of a power transistor/diode bridge when you replace an outdoor unit PCB. The silicone grease encourages the heat dissipation of a power transistor/diode bridge.
Page 234 SiUS092230E Part 8 Appendix 1. Piping Diagrams..................229 1.1 Indoor Unit....................229 1.2 Outdoor Unit ..................... 230 2. Wiring Diagrams..................232 2.1 Indoor Unit....................232 2.2 Outdoor Unit ..................... 235 3. Operation Limit..................237 Part 8 Appendix...
Page 235 SiUS092230E Piping Diagrams 1. Piping Diagrams Indoor Unit FTXR09/12WVJUW(S)9 FTXR18WVJUW(S)9 Indoor unit Indoor unit Heat exchanger thermistor 1/4 CuT Heat exchanger thermistor Heat exchanger 1/4 CuT Heat exchanger Cross flow fan Field piping Cross flow fan Field piping 1/4 CuT 1/4 CuT Fan motor Field piping...
Page 236 Piping Diagrams SiUS092230E Outdoor Unit RX09/12WMVJU9 3D135014 RX15/18WMVJU9 3D141501 Part 8 Appendix...
Page 237 SiUS092230E Piping Diagrams RX24WMVJU9 3D141502 Part 8 Appendix...
Page 238 Wiring Diagrams SiUS092230E 2. Wiring Diagrams Indoor Unit FTXR09/12/18WVJUW(S)9 3D103375B Note A1P: Control PCB A2P: Display/signal receiver PCB A3P: INTELLIGENT EYE sensor PCB Refer to page 23 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 239 SiUS092230E Wiring Diagrams FDMQ09/12/15/18/24WVJU9 3D112629B Note A1P: Control PCB A2P: Indoor fan PCB Refer to page 25 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 240 Wiring Diagrams SiUS092230E FFQ09/12/15/18W2VJU9 3D139759B Note A1P: Control PCB A2P: Transmitter board for wireless remote controller A3P: Receiver for wireless remote controller A4P: Thermopile sensor A5P: Pyroelectric sensor Refer to page 27 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 241 SiUS092230E Wiring Diagrams Outdoor Unit RX09/12WMVJU9 C: 3D134904 Note(s) PCB1: Main PCB Refer to page 32 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 242 Wiring Diagrams SiUS092230E RX15/18/24WMVJU9 C: 3D140830 Note(s) PCB: Main PCB Refer to page 34 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 243 SiUS092230E Operation Limit 3. Operation Limit RX09/12/15/18/24WMVJU9 3D092209F Part 8 Appendix...
Page 244 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.

This manual is also suitable for:

Ftxr09wvjuw9 Ftxr09wvjus9 Rx09wmvju9

Daikin RX-W Series Service Manual

Quick Links

Related Manuals for Daikin RX-W Series

Summary of Contents for Daikin RX-W Series

This manual is also suitable for: