Page 1 SiUS092231E Service Manual Inverter Pair RXL-W Series [Applied Models] Inverter Pair : Heat Pump...
Page 2: Table Of Contents
SiUS092231E 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 SiUS092231E 2.6 Thermostat Control..................51 2.7 NIGHT SET Mode ..................52 2.8 ECONO Operation ..................53 2.9 INTELLIGENT EYE Operation ..............54 2.10 POWERFUL Operation ................55 2.11 Clock Setting ....................56 2.12 WEEKLY TIMER Operation ............... 57 2.13 Other Functions..................63 3.
Page 4 SiUS092231E 3. Service Diagnosis ...................112 3.1 ARC480 Series..................112 3.2 ARC466 Series..................115 3.3 BRC1E73 ....................118 3.4 BRC082A43 ..................... 120 4. Error Codes and Description..............124 5. Troubleshooting for FTX, FVXS Series...........125 5.1 Indoor Unit PCB Abnormality ..............125 5.2 Freeze-up Protection Control/Heating Peak-cut Control ......127 5.3 Indoor Fan Motor (DC Motor) or Related Abnormality ......
Page 5 SiUS092231E 8. Check ......................186 8.1 Thermistor Resistance Check ..............186 8.2 Indoor Fan Motor Connector Check ............187 8.3 Power Supply Waveform Check............... 189 8.4 Electronic Expansion Valve Check............189 8.5 Four Way Valve Performance Check ............190 8.6 Inverter Unit Refrigerant System Check........... 192 8.7 Inverter Analyzer Check ................
Page 6: Introduction
SiUS092231E 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 7: Safety Cautions
SiUS092231E Safety Cautions 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 8 Safety Cautions SiUS092231E 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 9: Warnings And Cautions Regarding Safety Of Users
SiUS092231E Safety Cautions 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 10 Safety Cautions SiUS092231E 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 11 SiUS092231E Safety Cautions 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 12: Icons Used
Icons Used SiUS092231E 2. Icons Used The following icons are used to attract the attention of the reader to specific information. Icon Type of Description Information Warning Warning is used when there is danger of personal injury. Warning Caution Caution is used when there is danger that the reader, Caution through incorrect manipulation, may damage equipment, lose data, get an unexpected result or have to restart (part...
Page 13: Revision History
SiUS092231E Revision History 3. Revision History Month/Year Version Revised contents 11 / 2022 SiUS092231E First edition Introduction...
Page 14: Part 1 General Information
SiUS092231E Part 1 General Information 1. Applicable Models ..................10 2. Functions....................11 Part 1 General Information...
Page 15: Applicable Models
SiUS092231E Applicable Models 1. Applicable Models Indoor Unit Wall mounted type Floor standing type Duct concealed type FTX09WMVJU9 FVXS09WVJU9 FDMQ12WVJU9 FTX12WMVJU9 FVXS12WVJU9 FDMQ18WVJU9 FDMQ24WVJU9 FTX15WMVJU9 FVXS15WVJU9 FTX18WVJU9 FTX24WVJU9 Outdoor Unit RXL09WMVJU9 RXL12WMVJU9 RXL15WMVJU9 RXL18WMVJU9 RXL24WMVJU9 Part 1 General Information...
Page 16: Functions
Functions SiUS092231E 2. Functions Floor FDMQ Functions Wired Wireless FVXS 18/24 PAM control — — — — — Compressor — — — — — — — — — — — — — — — — — — — — — —...
Page 17: Part 2 Specifications
SiUS092231E Part 2 Specifications 1. Specifications ....................13 1.1 Wall Mounted Type ..................13 1.2 Floor Standing Type ................... 16 1.3 Duct Concealed Type................. 18 Part 2 Specifications...
Page 18: Specifications
Specifications SiUS092231E 1. Specifications Wall Mounted Type Indoor Unit FTX09WMVJU9 FTX12WMVJU9 Model RXL09WMVJU9 RXL12WMVJU9 Outdoor Unit Cooling Cooling 4.09 - 3.70 4.19 - 3.79 4.62 - 4.18 5.48 - 4.96 783 - 783 807 - 807 922 - 922 92.0 - 92.1 92.6 - 92.6 95.9 - 96.0 96.8 - 96.7...
Page 19 SiUS092231E Specifications Indoor Unit FTX15WMVJU9 FTX18WVJU9 Model RXL15WMVJU9 RXL18WMVJU9 Outdoor Unit Cooling Cooling 6.42 - 5.81 7.24 - 6.55 7.84 - 7.09 9.62 - 8.70 93.6 - 93.5 94.7 - 94.6 96.0 - 96.0 97.1 - 97.0 SEER2 / HSPF2 19.50 10.00 19.80...
Page 20 Specifications SiUS092231E Indoor Unit FTX24WVJU9 Model RXL24WMVJU9 Outdoor Unit Cooling 9.23 - 8.35 11.39 - 10.30 96.0 - 96.0 97.0 - 97.0 SEER2 / HSPF2 19.50 8.50 11.50 — — 3.06 Liquid Piping Connections Indoor Unit FTX24WVJU9 643 / 494 / 350 / 328 699 / 572 / 445 / 403 H / M / L / SL /min...
Page 21: Floor Standing Type
SiUS092231E Specifications Floor Standing Type Indoor Unit FVXS09WVJU9 FVXS12WVJU9 Model RXL09WMVJU9 RXL12WMVJU9 Outdoor Unit Cooling Cooling 4.08 - 3.69 3.91 - 3.54 4.58 - 4.14 5.00 - 4.52 783 - 783 767 - 767 927 - 927 92.3 - 92.3 94.3 - 94.3 97.3 - 97.3 97.4 - 97.4...
Page 22 Specifications SiUS092231E Indoor Unit FVXS15WVJU9 Model RXL15WMVJU9 Outdoor Unit Cooling 6.59 - 5.96 7.49 - 6.77 95.1 - 95.2 96.2 - 96.2 SEER2 / HSPF2 19.50 9.30 11.50 — — 3.52 Liquid Piping Connections Indoor Unit FVXS15WVJU9 378 / 325 / 275 / 233 417 / 357 / 300 / 251 H / M / L / SL /min...
Page 23: Duct Concealed Type
SiUS092231E Specifications Duct Concealed Type Indoor Unit FDMQ12WVJU9 FDMQ18WVJU9 Model RXL12WMVJU9 RXL18WMVJU9 Outdoor Unit Cooling Cooling 5.90 - 5.34 5.93 - 5.36 8.79 - 7.95 10.50 - 9.50 98.8 - 98.8 99.0 - 99.0 96.3 - 96.2 96.6 - 96.6 SEER2 / HSPF2 14.60 8.90...
Page 24 Specifications SiUS092231E Indoor Unit FDMQ24WVJU9 Model RXL24WMVJU9 Outdoor Unit Cooling 10.74 - 9.71 11.41 - 10.32 98.8 - 98.9 98.8 - 98.8 SEER2 / HSPF2 15.20 8.40 9.60 — — 3.00 Liquid Piping Connections I.D. Indoor Unit FDMQ24WVJU9 Multi Slit Fin / 731 / 621 / 512 731 / 621 / 512 H / M / L...
Page 25: Part 3 Printed Circuit Board Connector Wiring Diagram
SiUS092231E Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................21 1.1 FTX09/12WMVJU9 ..................21 1.2 FTX15WMVJU9 ..................23 1.3 FTX18/24WVJU9 ..................25 1.4 FVXS09/12/15WVJU9................27 1.5 FDMQ12/18/24WVJU9................29 2. Wired Remote Controller................31 2.1 BRC1E73 ....................31 3. Wireless Remote Controller Receiver for FDMQ Series ......32 3.1 BRC082A43 ....................
Page 26: Indoor Unit
Indoor Unit SiUS092231E 1. Indoor Unit FTX09/12WMVJU9 Control PCB Connector for swing motor (horizontal blade) (PCB1) Connector for display/signal receiver PCB (PCB2) Connector for indoor heat exchanger thermistor (RTH2) S200 Connector for DC fan motor S403 Connector for optional adaptor H1, H2, H3, FG Wire harness for terminal strip Fuse (3.15 A, 250 V)
Page 27 SiUS092231E Indoor Unit Display/Signal Connector for control PCB (PCB1) Receiver PCB Indoor unit ON/OFF switch (PCB2) (Forced cooling operation ON/OFF switch) Refer to page 206 for details of forced cooling operation. LED1 LED for operation (green) LED2 LED for timer (yellow) RTH1 Room temperature thermistor LED2 LED1...
Page 28: Ftx15Wmvju9
Indoor Unit SiUS092231E FTX15WMVJU9 Control PCB Connector for swing motor (horizontal blade) (PCB2) Connector for display/signal receiver PCB (PCB3) Connector for indoor heat exchanger thermistor (R2T) S200 Connector for DC fan motor S403 Connector for optional adaptor S900 Connector for filter PCB (PCB1) S200 S403 S900...
Page 29 SiUS092231E Indoor Unit Filter PCB (PCB1) S100 Connector for terminal strip S800 Connector for control PCB (PCB2) FG, HE Connector for ground Fuse (3.15 A, 250 V) Varistor S800 S100 3P380932-1 Display/Signal Connector for control PCB (PCB2) Receiver PCB Indoor unit ON/OFF switch (PCB3) (Forced cooling operation ON/OFF switch) Refer to page 206 for details of forced cooling operation.
Page 30: Ftx18/24Wvju9
Indoor Unit SiUS092231E FTX18/24WVJU9 Control PCB Connector for DC fan motor (PCB1) Connector for centralized control (HA) Wire harness for INTELLIGENT EYE sensor PCB (PCB4) Wire harness for indoor heat exchanger thermistor (R2T) Connector for swing motors Connector for display PCB (PCB3) Wire harness for signal receiver PCB (PCB2) H1, H2, H3, FG Wire harness for terminal strip Address setting jumper...
Page 31 SiUS092231E Indoor Unit Signal Receiver Connector for control PCB (PCB1) PCB (PCB2) 3P224121-1 Display PCB Connector for control PCB (PCB1) (PCB3) Indoor unit ON/OFF switch (Forced cooling operation ON/OFF switch) Refer to page 206 for details of forced cooling operation. LED1 (H1P) LED for operation (green) LED2 (H2P)
Page 32: Fvxs09/12/15Wvju9
Indoor Unit SiUS092231E FVXS09/12/15WVJU9 Control PCB Connector for DC fan motor (PCB2) Connector for centralized control (HA) Connector for service PCB (PCB3) Wire harness for indoor heat exchanger thermistor (R2T) Connector for lower air outlet motor Connector for swing motor Connector for display/signal receiver PCB (PCB4) Connector for sensor PCB (PCB1) H1, H2, H3...
Page 33 SiUS092231E Indoor Unit Sensor PCB Connector for control PCB (PCB2) (PCB1) Room temperature thermistor 3P191450-1 Service PCB Connector for control PCB (PCB2) (PCB3) S2W(4) Switch for upward airflow limit setting Refer to page 217 for details.  Keep the other switches as factory setting. Switch for airflow selection Refer to page 44 for details.
Page 34: Fdmq12/18/24Wvju9
Indoor Unit SiUS092231E FDMQ12/18/24WVJU9 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 35 SiUS092231E Indoor Unit 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 36: Wired Remote Controller
Wired Remote Controller SiUS092231E 2. 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 37: Wireless Remote Controller Receiver For Fdmq Series
SiUS092231E Wireless Remote Controller Receiver for FDMQ Series 3. Wireless Remote Controller Receiver for FDMQ Series BRC082A43 Wired Remote MAIN/SUB setting switch Controller PCB Refer to page 225 for details. Address setting switch Refer to page 225 for details. P1, P2 Terminal for indoor unit control PCB (A1P) 3P431101-2 Part 3 Printed Circuit Board Connector Wiring Diagram...
Page 38: Outdoor Unit
Outdoor Unit SiUS092231E 4. Outdoor Unit RXL09WMVJU9 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 SiUS092231E Outdoor Unit HL1, HN1, S V150 E1, E2 LED A 2P415459-94 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: Rxl12Wmvju9
Outdoor Unit SiUS092231E RXL12WMVJU9 Main PCB (PCB1) 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 SiUS092231E Outdoor Unit HL1, HN1, S E1, E2 LED A V150 U, V, W 2P575834-16 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: Rxl15Wmvju9
Outdoor Unit SiUS092231E RXL15WMVJU9 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 43: Rxl18/24Wmvju9
SiUS092231E Outdoor Unit RXL18/24WMVJU9 Main PCB (PCB1) Connector for terminal block (indoor - outdoor transmission) 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) S201, S202...
Page 44 Outdoor Unit SiUS092231E Service Monitor S501, S502 Connector for main PCB (PCB1) PCB (PCB2) LEDA LED for service monitor (green) SW5-2 Switch for warmer airflow setting Refer to page 230 for details. SW5-3 Switch for facility setting Refer to page 228 for details. SW6-1 Switch for drain pan heater Refer to page 232 for details.
Page 45: Part 4 Functions And Control
SiUS092231E Part 4 Functions and Control 1. Common Functions ...................42 1.1 Temperature Control .................. 42 1.2 Frequency Principle..................42 2. Functions for FTX, FVXS Series ...............44 2.1 Airflow Direction Control................44 2.2 COMFORT AIRFLOW Operation ............... 47 2.3 Fan Speed Control for Indoor Unit ............. 48 2.4 Program Dry Operation ................
Page 46 SiUS092231E 5.13 Malfunctions ....................90 Part 4 Functions and Control...
Page 47: Common Functions
SiUS092231E Common Functions 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 48 Common Functions SiUS092231E  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 49: Functions For Ftx, Fvxs Series
SiUS092231E Functions for FTX, FVXS Series 2. Functions for FTX, FVXS 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) Flap(s) cooling, dry and heating operation. Cooling/Dry During cooling or dry operation, the flap retracts into the indoor unit.
Page 50 Functions for FTX, FVXS Series SiUS092231E FVXS Series Flap (up and down) Cooling/Dry Heating Upward airflow limit OFF R4003397 R4003396 Upward airflow limit ON R4003394 R4003394 3-D Airflow FTX18/24 only Alternative repetition of vertical and horizontal swing motions enables uniform air-conditioning of the entire room.
Page 51 SiUS092231E Functions for FTX, FVXS Series When setting the airflow selection switch to  The air conditioner automatically decides the appropriate blowing pattern depending on the operating mode/situation. Operating mode Situation Blowing pattern When the operation is Air is blown from the upper activated or when the room is and lower air outlets in order not fully cooled.
Page 52: Comfort Airflow Operation
Functions for FTX, FVXS Series SiUS092231E COMFORT AIRFLOW Operation Applicable FTX09/12/15WMVJU9 Models FTX18/24WVJU9 Outline The horizontal blades (louvers) are controlled not to blow the air directly at the people in the room. Cooling Heating 09/12 class 0° 65° R4003675 R4003676 10°...
Page 53: Fan Speed Control For Indoor Unit
SiUS092231E Functions for FTX, FVXS 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 54: Program Dry Operation
Functions for FTX, FVXS Series SiUS092231E 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 55: Automatic Cooling/Heating Changeover
SiUS092231E Functions for FTX, FVXS 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 56: Thermostat Control
Functions for FTX, FVXS Series SiUS092231E Thermostat Control Outline Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Details Thermostat OFF Condition  The temperature difference is in the zone A. Thermostat ON Conditions ...
Page 57: Night Set Mode
SiUS092231E Functions for FTX, FVXS 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 58: Econo Operation
Functions for FTX, FVXS Series SiUS092231E ECONO Operation Outline ECONO operation reduces the maximum operating current and the power consumption. This operation is particularly convenient for energy-saving. It is also a major bonus when breaker capacity does not allow the use of multiple electrical devices and air conditioners. It can be easily activated by pressing ECONO or Econo/Quiet button on the wireless remote controller.
Page 59: Intelligent Eye Operation
SiUS092231E Functions for FTX, FVXS Series INTELLIGENT EYE Operation Applicable FTX18/24WVJU9 Models Outline The microcomputer detects the presence with a motion sensor and reduces the capacity when there is nobody in the room in order to save electricity. Details 1. INTELLIGENT EYE detection method Sampling (20 msec.) 1 sec.
Page 60: Powerful Operation
Functions for FTX, FVXS Series SiUS092231E Note(s) For dry operation, the temperature cannot be set with a remote controller, but the target temperature is shifted internally. 2.10 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.
Page 61: Clock Setting
SiUS092231E Functions for FTX, FVXS Series 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 62: Weekly Timer Operation
Functions for FTX, FVXS Series SiUS092231E 2.12 WEEKLY TIMER Operation Applicable FTX18/24WVJU9 Models FVXS09/12/15WVJU9 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 The illustrations are for FVXS series as representative.
Page 63 SiUS092231E Functions for FTX, FVXS Series 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 64 Functions for FTX, FVXS Series SiUS092231E 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 65 SiUS092231E Functions for FTX, FVXS Series 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 66 Functions for FTX, FVXS Series SiUS092231E 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 67 SiUS092231E Functions for FTX, FVXS Series 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 68: Other Functions
Functions for FTX, FVXS Series SiUS092231E 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 69: Functions For Fdmq Series
SiUS092231E Functions for FDMQ Series 3. Functions for FDMQ 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 70: Program Dry Operation
Functions for FDMQ Series SiUS092231E 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 71: Clock And Calendar Setting (With Brc1E73)
SiUS092231E Functions for FDMQ 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 72 Functions for FDMQ Series SiUS092231E 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 73: Schedule Timer Operation (With Brc1E73)
SiUS092231E Functions for FDMQ 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 74 Functions for FDMQ Series SiUS092231E  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 75 SiUS092231E Functions for FDMQ Series 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 76: Drain Pump Control
Functions for FDMQ Series SiUS092231E  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 77 SiUS092231E Functions for FDMQ Series If Float Switch is OFF with Thermostat ON in Cooling Operation ∗2 ∗1 ∗4 ∗3 Float switch 5 sec. 5 sec. Thermostat (running) Error display Drain pump 5 min. 5 sec. 5 min. 5 sec. 5 min. 5 sec. (R24610) ...
Page 78: Hot Start Control (In Heating Operation Only)
Functions for FDMQ Series SiUS092231E If Float Switch Turns ON and OFF Continuously, or Float Switch Turns OFF While AF Displayed ∗1 ∗2 ∗3 Float Switch 5 sec. 5 sec. 5 sec. 5 sec. 5 sec. Thermostat (running) Error Display Drain Pump 5 min.
Page 79: Other Functions
SiUS092231E Functions for FDMQ Series Other Functions 3.7.1 Signal Receiving Sign When the indoor unit receives a signal from the remote controller, the unit emits a signal receiving sound. 3.7.2 Auto-restart Function If a power failure (even a momentary one) occurs during the operation, the system restarts automatically in the same conditions as before when the power supply is restored to the conditions prior to the power failure.
Page 80: Thermistor Functions
Thermistor Functions SiUS092231E 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 81: Control Specification
SiUS092231E 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 82 Control Specification SiUS092231E (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 83: Controls At Mode Changing/Start-Up
SiUS092231E Control Specification Controls at Mode Changing/Start-up 5.3.1 Preheating Control Outline The inverter operation in open phase starts with the conditions of the outdoor temperature, the discharge pipe temperature, the radiation fin temperature and the preheating command from the indoor unit. Details 09/15 class Outdoor temperature ≥...
Page 84 Control Specification SiUS092231E 5.3.3 Four Way Valve Operation Compensation Outline At the beginning of operation as the four way valve is switched, the pressure difference to activate the four way valve is acquired when the output frequency is higher than a certain fixed frequency, for a certain fixed time.
Page 85: Discharge Pipe Temperature Control
SiUS092231E Control Specification 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 86: Input Current Control
Control Specification SiUS092231E 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 87: High Pressure Protection Control
SiUS092231E 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 (602 psi) Pressure Condensing...
Page 88: Freeze-Up Protection Control
Control Specification SiUS092231E 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 89: Heating Peak-Cut Control
SiUS092231E Control Specification Heating Peak-cut Control During heating operation, the indoor heat exchanger temperature determines the frequency upper limit to prevent abnormal high pressure. The operating frequency limitation is judged with the indoor heat exchanger temperature. Stop zone Dropping zone Keep zone Up zone Reset zone...
Page 90: Outdoor Fan Control
Control Specification SiUS092231E 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 91: Defrost Control
SiUS092231E Control Specification 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 92: Electronic Expansion Valve Control
Control Specification SiUS092231E 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 93 SiUS092231E Control Specification 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 94 Control Specification SiUS092231E 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 95: Malfunctions
SiUS092231E Control Specification 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 96: Part 5 Remote Controller
SiUS092231E Part 5 Remote Controller 1. Applicable Remote Controller ..............92 2. ARC466A21 ....................93 3. ARC466A37 ....................95 4. ARC480A8 ....................97 5. BRC082A43 ....................98 6. BRC944B2 ....................100 7. BRC1E73 ....................101 Part 5 Remote Controller...
Page 97: Applicable Remote Controller
BRC1E73 FDMQ24WVJU9 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 98: Arc466A21
ARC466A21 SiUS092231E 2. ARC466A21 Signal transmitter Display (LCD) • Displays the current settings. (In this illustration, each section is shown with all its displays on for the Receiver purpose of explanation.) Temperature • T o use the remote controller, aim the adjustment buttons transmitter at the indoor unit.
Page 99 SiUS092231E ARC466A21 Open the Front Cover Mode button • Selects the operation mode. AUTO COOL HEAT 2 ECONO button • Starts ECONO operation. 3 Swing button Quiet button • Adjusts the airflow direction. • Starts QUIET OUTDOOR UNIT operation. • When you press Swing •...
Page 100: Arc466A37
ARC466A37 SiUS092231E 3. ARC466A37 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.) Receiver Temperature adjustment • To use the remote controller, aim the buttons transmitter at the indoor unit.
Page 101 SiUS092231E ARC466A37 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. Comfort/Sensor button (COMFORT AIRFLOW 2 Operation /INTELLIGENT ECONO QUIET...
Page 102: Arc480A8
ARC480A8 SiUS092231E 4. ARC480A8 Display (LCD) Signal transmitter • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) OFF button Receiver • Press this button to stop the operation.
Page 103: Brc082A43
SiUS092231E BRC082A43 5. 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 SiUS092231E 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: Brc944B2
SiUS092231E BRC944B2 6. 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 106: Brc1E73
BRC1E73 SiUS092231E 7. 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 107 SiUS092231E 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 108 BRC1E73 SiUS092231E 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 109 SiUS092231E 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 110 BRC1E73 SiUS092231E 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 111 SiUS092231E 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 112: Part 6 Service Diagnosis
SiUS092231E Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items ........109 2. Troubleshooting with LED ...............110 2.1 Indoor Unit....................110 2.2 Outdoor Unit ..................... 111 3. Service Diagnosis ...................112 3.1 ARC480 Series..................112 3.2 ARC466 Series..................115 3.3 BRC1E73 ....................118 3.4 BRC082A43 .....................
Page 113 SiUS092231E 7.6 DC Fan Lock .................... 164 7.7 Input Overcurrent Detection ..............165 7.8 Four Way Valve Abnormality..............167 7.9 Discharge Pipe Temperature Control............169 7.10 High Pressure Control in Cooling ............. 170 7.11 System Shutdown due to Temperature Abnormality in the Compressor..................
Page 114: General Problem Symptoms And Check Items
General Problem Symptoms and Check Items SiUS092231E 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 115: Troubleshooting With Led
SiUS092231E Troubleshooting with LED 2. Troubleshooting with LED Indoor Unit Operation Lamp  FTX, FVXS Check the interval time between blinks of the OPERATION lamp. Blink every 0.5 seconds This is a notification of an abnormality. Conduct the diagnostic procedure described in the following pages. ...
Page 116: Outdoor Unit
Troubleshooting with LED SiUS092231E Operation lamp (green) #The error or warning message also blinks on the basic screen. R4003516  FDMQ series with BRC082A43 For wireless remote controller, a receiver is installed. When the error occurs, the operation lamp on the receiver blinks.
Page 117: Service Diagnosis
SiUS092231E Service Diagnosis 3. Service Diagnosis ARC480 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 <ARC480 Series>...
Page 118 Service Diagnosis SiUS092231E 3.1.2 Method 2 1. Press the center of TEMP button and OFF button at the same time. R6000668 SC is displayed on the LCD. R6000695 2. Select SC (service check) with TEMP or TEMP button. 3. Press FAN button to enter the service check mode. R6000669 00 is displayed and the left-side number blinks.
Page 119 SiUS092231E Service Diagnosis  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 124. 6. Press FAN button. R6000669 The right-side number blinks. R6000697 7.
Page 120: Arc466 Series
Service Diagnosis SiUS092231E ARC466 Series 3.2.1 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 SiUS092231E Service Diagnosis 3.2.2 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 SiUS092231E  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 124. 6. Press Mode button. (R24047) The right-side number blinks. (R11673) 7.
Page 123: Brc1E73
SiUS092231E 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: Brc082A43
SiUS092231E Service Diagnosis BRC082A43 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 z Others...
Page 126 Service Diagnosis SiUS092231E 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 SiUS092231E 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 SiUS092231E 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: Error Codes And Description
SiUS092231E Error Codes and Description 4. Error Codes and Description Reference Page Error Description Codes FVXS 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 Ftx, Fvxs Series
Troubleshooting for FTX, FVXS Series SiUS092231E 5. Troubleshooting for FTX, FVXS 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 SiUS092231E Troubleshooting for FTX, FVXS Series Note Connectors FTX09/12/18/24 Terminal ~ Control PCB (H1, H2, H3) FVXS FTX15 Terminal ~ Filter PCB (S100) Filter PCB (S800) ~ Control PCB (S900) Part 6 Service Diagnosis...
Page 132: Freeze-Up Protection Control/Heating Peak-Cut Control
Troubleshooting for FTX, FVXS Series SiUS092231E 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 SiUS092231E Troubleshooting for FTX, FVXS Series Reference Check No.01 Refer to P.186 Part 6 Service Diagnosis...
Page 134: Indoor Fan Motor (Dc Motor) Or Related Abnormality
Troubleshooting for FTX, FVXS Series SiUS092231E 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 135 SiUS092231E Troubleshooting for FTX, FVXS Series Continued from the previous page Abnormal Fan rotates smoothly? sound occurs? Check No. 03 Check the fan motor for breakdown or short circuit. Is the rubber cushion Replace the bearing rubber properly fitted? cushion. Correct the position of rubber cushion or replace the rubber cushion.
Page 136 Troubleshooting for FTX, FVXS Series SiUS092231E Troubleshooting FTX18/24, FVXS 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 137 SiUS092231E Troubleshooting for FTX, FVXS Series Note(s) The rotation pulse is the feedback signal from the indoor fan motor. Reference Check No.02 Refer to P.187 Part 6 Service Diagnosis...
Page 138: Thermistor Or Related Abnormality
Troubleshooting for FTX, FVXS Series SiUS092231E Thermistor or Related Abnormality C4, C9 Error Code Method of Error The temperatures detected by the thermistors determine thermistor errors. Detection Error Decision The voltage between the both ends of the thermistor is either 4.96 V or more, or 0.04 V or less with Conditions the power on.
Page 139: Low-Voltage Detection Or Over-Voltage Detection
SiUS092231E Troubleshooting for FTX, FVXS 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 140 Troubleshooting for FTX, FVXS Series SiUS092231E 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 141: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)
SiUS092231E Troubleshooting for FTX, FVXS Series 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 142 Troubleshooting for FTX, FVXS Series SiUS092231E 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 143: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)
SiUS092231E Troubleshooting for FTX, FVXS Series 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 144: Troubleshooting For Fdmq Series
Troubleshooting for FDMQ Series SiUS092231E 6. Troubleshooting for FDMQ 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 145: Drain Level Control System Abnormality
SiUS092231E Troubleshooting for FDMQ Series 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 146: Indoor Fan Motor (Dc Motor) Or Related Abnormality
Troubleshooting for FDMQ Series SiUS092231E Indoor Fan Motor (DC Motor) or Related Abnormality Error Code Method of Error  Detection from the current flow on the fan PCB Detection  Detection from the rotation speed of the fan motor in operation Error Decision The rotation speed is less than a certain level for 6 seconds.
Page 147 SiUS092231E Troubleshooting for FDMQ Series 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 148: Indoor Fan Pcb Abnormality
Troubleshooting for FDMQ Series SiUS092231E Indoor Fan PCB Abnormality 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  Defective fan PCB Causes ...
Page 149: Humidifier Or Related Abnormality
SiUS092231E Troubleshooting for FDMQ 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 150: Thermistor Or Related Abnormality
Troubleshooting for FDMQ Series SiUS092231E 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 151: Remote Controller Thermistor Abnormality
SiUS092231E Troubleshooting for FDMQ Series 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 152: Low-Voltage Detection Or Over-Voltage Detection
Troubleshooting for FDMQ Series SiUS092231E 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 153 SiUS092231E Troubleshooting for FDMQ 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 154: Signal Transmission Error (Between Indoor And Outdoor Unit)
Troubleshooting for FDMQ Series SiUS092231E 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 155 SiUS092231E Troubleshooting for FDMQ 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 wires between the indoor unit and the...
Page 156: Signal Transmission Error (Between Indoor Unit And Remote Controller)
Troubleshooting for FDMQ Series SiUS092231E 6.10 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 157: Signal Transmission Error (Between Main/Sub Remote Controllers)
SiUS092231E Troubleshooting for FDMQ Series 6.11 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 158: Mismatching Of Indoor Unit And Outdoor Unit
Troubleshooting for FDMQ Series SiUS092231E 6.12 Mismatching of 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  Defective optional unit(s) wirings ...
Page 159: Troubleshooting For Outdoor Unit
SiUS092231E Troubleshooting for Outdoor Unit 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 160: Actuation Of High Pressure Switch
Troubleshooting for Outdoor Unit SiUS092231E Actuation of High Pressure Switch Applicable RXL15/18/24WMVJU9 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 161 SiUS092231E Troubleshooting for Outdoor Unit 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 162: Ol Activation (Compressor Overload) Or Hps Activation (High Pressure Switch)
Troubleshooting for Outdoor Unit SiUS092231E OL Activation (Compressor Overload) or HPS Activation (High Pressure Switch) Applicable RXL09/12WMVJU9 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 163 SiUS092231E Troubleshooting for Outdoor Unit 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 164 Troubleshooting for Outdoor Unit SiUS092231E Note(s) OL (Q1M/Q1L) activating temperature: 130°C (266°F) OL (Q1M/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.186 Reference Check No.12 Refer to P.189 Reference...
Page 165: Ol Activation (Compressor Overload)
SiUS092231E Troubleshooting for Outdoor Unit OL Activation (Compressor Overload) Applicable RXL15/18/24WMVJU9 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 166 Troubleshooting for Outdoor Unit SiUS092231E 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 167 SiUS092231E Troubleshooting for Outdoor Unit Reference Check No.13 Refer to P.190 Reference Check No.14 Refer to P.192 Part 6 Service Diagnosis...
Page 168: Compressor Lock
Troubleshooting for Outdoor Unit SiUS092231E 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 169: Dc Fan Lock
SiUS092231E Troubleshooting for Outdoor Unit 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 170: Input Overcurrent Detection
Troubleshooting for Outdoor Unit SiUS092231E 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 ~ 20.0 A (depending on the model) for 2.5 seconds with the Conditions compressor running.
Page 171 SiUS092231E Troubleshooting for Outdoor Unit Reference Check No.18 Refer to P.197 Part 6 Service Diagnosis...
Page 172: Four Way Valve Abnormality
Troubleshooting for Outdoor Unit SiUS092231E 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 C seconds after operating for 5 minutes.
Page 173 SiUS092231E Troubleshooting for Outdoor Unit 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 174: Discharge Pipe Temperature Control
Troubleshooting for Outdoor Unit SiUS092231E 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 175: High Pressure Control In Cooling
SiUS092231E Troubleshooting for Outdoor Unit 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 ...
Page 176 Troubleshooting for Outdoor Unit SiUS092231E 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 177: System Shutdown Due To Temperature Abnormality In The Compressor
SiUS092231E Troubleshooting for Outdoor Unit 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 178: Compressor Sensor System Abnormality
Troubleshooting for Outdoor Unit SiUS092231E 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 179: Position Sensor Abnormality
SiUS092231E Troubleshooting for Outdoor Unit 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 180 Troubleshooting for Outdoor Unit SiUS092231E 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 181 SiUS092231E Troubleshooting for Outdoor Unit 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 182: Thermistor Or Related Abnormality (Outdoor Unit)
Troubleshooting for Outdoor Unit SiUS092231E 7.14 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 183 SiUS092231E 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 184: Electrical Box Temperature Rise
Troubleshooting for Outdoor Unit SiUS092231E 7.15 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 185 SiUS092231E Troubleshooting for Outdoor Unit Reference Check No.19 Refer to P.198 Part 6 Service Diagnosis...
Page 186: Radiation Fin Temperature Rise
Troubleshooting for Outdoor Unit SiUS092231E 7.16 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 187 SiUS092231E 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. Then, turn on the power to restart the system. Has the PCB Error displayed Check if silicone grease is been replaced?
Page 188: Output Overcurrent Detection
Troubleshooting for Outdoor Unit SiUS092231E 7.17 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 189 SiUS092231E Troubleshooting for Outdoor Unit Continued from the previous page Any LED off? Correct the power supply or replace the outdoor unit PCB (main PCB). Check No. 22 Check the power module. Normal? Replace the outdoor unit PCB (main PCB). Turn off the power, and reconnect the harnesses.
Page 190: Signal Transmission Error On Outdoor Unit Pcb
Troubleshooting for Outdoor Unit SiUS092231E 7.18 Signal Transmission Error on Outdoor Unit PCB Error Code Method of Error Communication error between microcomputer mounted on the main PCB and PM1. Detection Error Decision  The abnormality is determined when the data sent from the PM1 cannot be received for 9 Conditions seconds.
Page 191: Check
SiUS092231E Check 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 192: Indoor Fan Motor Connector Check
Check SiUS092231E Indoor Fan Motor Connector Check Check No.02 FTX18/24, FVXS 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 193 SiUS092231E Check Check No.03 FTX09/12/15  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 194: Power Supply Waveform Check
Check SiUS092231E Power Supply Waveform Check Check No.11 Measure the power supply waveform between No. 1 and No. 2 on the terminal strip, and check the waveform disturbance.  Check if the power supply waveform is a sine wave (Fig.1). ...
Page 195: Four Way Valve Performance Check
SiUS092231E Check Four Way Valve Performance Check Check No.13  09/12 Class 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?
Page 196 Check SiUS092231E  15/18/24 Class < 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. voltage at 0 VDC Replace the outdoor unit with the outdoor unit PCB.
Page 197: Inverter Unit Refrigerant System Check
SiUS092231E Check Inverter Unit Refrigerant System Check Check No.14 Refrigerant system check Is the discharge pipe Reconnect the thermistor. thermistor disconnected from the holder? Check for refrigerant leakage. See the service diagnosis on refrigerant shortage (U0). Replace the refrigerant. R6000874 Part 6 Service Diagnosis...
Page 198: Inverter Analyzer Check
Check SiUS092231E 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 199 SiUS092231E Check FTX09/12/15 1. Turn the power on. 2. Press the center of TEMP button and OFF button on the remote controller at the same time. 3. Select T with TEMP or TEMP button. 4. Press FAN button. 5. Press FAN ONLY button to start the power transistor test operation. 2, 3 R6000683 FTX18/24, FVXS...
Page 200 Check SiUS092231E FDMQ with Wired Remote Controller (BRC1E73) Basic screen 1. Turn the power on. 2. Set FAN operation using the remote controller. Press and hold Cancel 3. Press and hold Cancel button for 4 seconds or button for 4 seconds or longer.
Page 201: Outdoor Fan Motor Check
SiUS092231E Check 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 202: Installation Condition Check
Check SiUS092231E 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 203: Outdoor Fan System Check
SiUS092231E Check 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 204 Check SiUS092231E 12 class Multimeter (R23024) 15 class Multimeter (R25105) Part 6 Service Diagnosis...
Page 205 SiUS092231E Check 18/24 class Multimeter (R24538) Part 6 Service Diagnosis...
Page 206: Power Module Check
Check SiUS092231E 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 SiUS092231E Check 12 class Pin 24: + Pin 23: U Pin 22: V Pin 21: W Pin 20: – (R23025) 15 class DC_P1: + (R20704) DC_N1: – Part 6 Service Diagnosis...
Page 208 Check SiUS092231E 18/24 class DC– (R24539) Part 6 Service Diagnosis...
Page 209: Part 7 Trial Operation And Field Settings
SiUS092231E Part 7 Trial Operation and Field Settings 1. Pump Down Operation................205 2. Forced Cooling Operation ...............206 3. Trial Operation ..................209 4. Field Settings for FTX, FVXS Series............213 4.1 Temperature Display Switch ..............213 4.2 When 2 Units are Installed in 1 Room............214 4.3 Jumper and Switch Settings..............
Page 210: Pump Down Operation
Pump Down Operation SiUS092231E 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 211: Forced Cooling Operation
SiUS092231E 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 212 Forced Cooling Operation SiUS092231E  With remote controller FTX09/12/15 1. Press Temp,  buttons and OFF button at the same time. 2. Press Temp button, select "T", and press FAN button. 3. Press COOL button to turn on the system. Forced cooling operation will stop automatically after about 30 minutes.
Page 213 SiUS092231E Forced Cooling Operation For FDMQ series FDMQ 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 214: Trial Operation
Trial Operation SiUS092231E 3. Trial Operation Outline Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts, such as flap movement, are working properly. Trial operation should be carried out in either cooling or heating operation. Procedure 1.
Page 215 SiUS092231E Trial Operation  ARC466 Series 1. Press Temp ,  button and Mode button at the same time. 2. Press Tempor button, select "T", and press Mode button for confirmation. 3. Press Mode button and select operation mode. 4. Press On/Off button to turn on the system. 5.
Page 216 Trial Operation SiUS092231E Wired Remote Controller (BRC1E73) 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 217 SiUS092231E Trial Operation Test Items Test items Symptoms Indoor and outdoor units are installed Fall, vibration, noise securely. Is the outdoor unit fully installed? No operation or burn damage No refrigerant gas leaks. Incomplete cooling/heating function Refrigerant gas and liquid pipes and indoor Water leakage drain hose extension are thermally insulated.
Page 218: Field Settings For Ftx, Fvxs Series
Field Settings for FTX, FVXS Series SiUS092231E 4. Field Settings for FTX, FVXS Series Temperature Display Switch ARC480 Series  You can select Fahrenheit or Celsius for temperature display.  Press TEMP button and ON TIMER buttons simultaneously for 5 seconds to change the unit of temperature display.
Page 219: When 2 Units Are Installed In 1 Room
SiUS092231E Field Settings for FTX, FVXS Series 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. FTX09/12/15 1.
Page 220 Field Settings for FTX, FVXS Series SiUS092231E FTX18/24 1. Remove the front grille. 2. Remove the electrical box. 3. Remove the shield plate of the electrical box. 4. Cut the address setting jumper JA on the PCB. 5. Remove the cover of remote controller battery. 6.
Page 221 SiUS092231E Field Settings for FTX, FVXS Series Address EXIST Sensor PCB fixing Front shield plate plate 6. Shield plate R7000157 Wireless Remote Controller Jumper (J4) ADDRESS EXIST ∗ Do not cut the left jumper. (R18416) Caution Replace the PCB if you cut a jumper unintentionally. Jumpers are necessary for electronic circuit.
Page 222: Jumper And Switch Settings
Field Settings for FTX, FVXS Series SiUS092231E Jumper and Switch Settings Jumper for FTX18/24, FVXS Jumper When connected on indoor Function When cut (factory setting) unit PCB Fan speed setting when Fan speed setting; The fan stops. compressor stops for Remote controller setting thermostat OFF.
Page 223: Service Mode Of Wireless Remote Controller
SiUS092231E Field Settings for FTX, FVXS Series 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.
Page 224 Field Settings for FTX, FVXS Series SiUS092231E 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 225 SiUS092231E Field Settings for FTX, FVXS Series Note After replacing the indoor unit PCB, all the values are returned to the factory settings. Use the remote controller to change the settings again. When only the remote controller is replaced, the values stored in the PCB remain the same. There is no hassle to the end user.
Page 226: Field Settings For Fdmq Series
Field Settings for FDMQ Series SiUS092231E 5. Field Settings for FDMQ 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 227 SiUS092231E Field Settings for FDMQ 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 228 Field Settings for FDMQ Series SiUS092231E BRC082A43 Wireless Remote Controller UP button Mode No. DOWN button Field setting mode First code No. RESERVE button MODE button Second code No. INSPECTION/TEST button R7000287 To set the field settings, you have to change: ...
Page 229: Overview Of Field Settings
SiUS092231E Field Settings for FDMQ Series Overview of Field Settings First Second Code No. Mode Code Description of setting Approx. Approx. Filter cleaning sign interval (used to Longlife filter — 2,500 hrs. 1,250 hrs. change filter cleaning display interval according to filter Approx.
Page 230: Main/Sub And Address Setting For Wireless Remote Controller
Field Settings for FDMQ Series SiUS092231E 18/24 class First Mode Code Second Code No. External static pressure 05  50 Pa  60 Pa 70 Pa 80 Pa 90 Pa 100 Pa (23) 110 Pa 120 Pa 130 Pa 140 Pa 150 Pa Factory Setting MAIN/SUB and Address Setting for Wireless Remote...
Page 231 SiUS092231E Field Settings for FDMQ Series Wireless address switch Set the address setting switch (SS2) on the signal receiver PCB according to the table below. No.1 No.2 No.3 Address setting switch (SS2) R7000183 R7000184 R7000185 Wireless Remote Factory set is 1. Change the wireless remote controller address setting by the following steps, if Controller necessary.
Page 232 Field Settings for FDMQ Series SiUS092231E 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. Check what setting the customer needs and make the multiple setting as shown below.
Page 233: Field Settings For Outdoor Unit
SiUS092231E Field Settings for Outdoor Unit 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 234 Field Settings for Outdoor Unit SiUS092231E (3) Turn on SW5-3. Remove the switch Screw Turn on switch 3 cover R7000285 Reference For the location of the jumper, refer to pages 33, 35, 37. Caution  If the outdoor unit is installed where the heat exchanger of the unit is exposed to direct wind, provide a windbreak wall.
Page 235: Warmer Airflow Setting
SiUS092231E 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/disabled from remote controller or outdoor unit.
Page 236 Field Settings for Outdoor Unit SiUS092231E Reference For the location of the jumper, refer to page 33, 35, 37. Note(s) Warmer airflow can be enabled from either indoor or outdoor unit. Warmer airflow becomes available when either one of the RC or outdoor unit setting is enabled. For example, if the outdoor unit has the switch for warmer airflow, it can be set even when it is disabled on the indoor unit.
Page 237: Drain Pan Heater
SiUS092231E Field Settings for Outdoor Unit 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. For 09/12/15 class 1. Attach the drain pan heater in accordance with the installation manual included with the drain pan heater.
Page 238: Silicone Grease On Power Transistor/Diode Bridge
Silicone Grease on Power Transistor/Diode Bridge SiUS092231E 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 239: Part 8 Appendix
SiUS092231E Part 8 Appendix 1. Piping Diagrams..................235 1.1 Indoor Unit....................235 1.2 Outdoor Unit ..................... 237 2. Wiring Diagrams..................240 2.1 Indoor Unit....................240 2.2 Outdoor Unit ..................... 245 3. Operation Limit..................249 Part 8 Appendix...
Page 240: Piping Diagrams
Piping Diagrams SiUS092231E 1. Piping Diagrams Indoor Unit FTX09/12WMVJU9 FTX15WMVJU9 INDOOR UNIT INDOOR UNIT HEAT EXCHANGER 1/4 CuT DISTRIBUTOR HEAT EXCHANGER THERMISTOR ON HEAT EXCH. THERMISTOR CROSS FLOW FAN ON HEAT EXCH. FIELD PIPING FIELD PIPING CROSS FLOW FAN 1/4 CuT ( 1/4 CuT ) SINGLE UNION JOINT...
Page 241 SiUS092231E Piping Diagrams FVXS09/12WVJU9 FVXS15WVJU9 4D091794A 4D091795B FDMQ12/18/24WVJU9 MODEL FDMQ09 1/4 (6.4) 3/8 (9.5) • 1/4 (6.4) 1/2 (12.7) FDMQ15 • FDMQ24 1/4 (6.4) 5/8 (15.9) C: 4D112974B Part 8 Appendix...
Page 242: Outdoor Unit
Piping Diagrams SiUS092231E Outdoor Unit RXL09WMVJU9 3D135015 RXL12WMVJU9 3D135016 Part 8 Appendix...
Page 243 SiUS092231E Piping Diagrams RXL15WMVJU9 3D141505 RXL18WMVJU9 3D141506 Part 8 Appendix...
Page 244 Piping Diagrams SiUS092231E RXL24WMVJU9 3D141503 Part 8 Appendix...
Page 245: Wiring Diagrams
SiUS092231E Wiring Diagrams 2. Wiring Diagrams Indoor Unit FTX09/12WMVJU9 3D142895 Note(s) PCB1: Control PCB PCB2: Display/signal receiver PCB Refer to page 21 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 246 Wiring Diagrams SiUS092231E FTX15WMVJU9 3D090199C Note(s) PCB1: Filter PCB PCB2: Control PCB PCB3: Display/signal receiver PCB Refer to page 23 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 247 SiUS092231E Wiring Diagrams FTX18/24WVJU9 C: 3D060942X Note(s) PCB1: Control PCB PCB2: Signal receiver PCB PCB3: Display PCB PCB4: INTELLIGENT EYE sensor PCB Refer to page 25 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 248 Wiring Diagrams SiUS092231E FVXS09/12/15WVJU9 C: 3D090604C Note(s) PCB1: Sensor PCB PCB2: Control PCB PCB3: Service PCB PCB4: Display/signal receiver PCB Refer to page 27 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 249 SiUS092231E Wiring Diagrams FDMQ12/18/24WVJU9 3D112629B Note(s) A1P: Control PCB A2P: Indoor fan PCB Refer to page 29 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 250: Outdoor Unit
Wiring Diagrams SiUS092231E Outdoor Unit RXL09WMVJU9 C: 3D134975 Note(s) PCB1: Main PCB Refer to page 33 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 251 SiUS092231E Wiring Diagrams RXL12WMVJU9 C: 3D134919 Note(s) PCB1: Main PCB Refer to page 35 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 252 Wiring Diagrams SiUS092231E RXL15WMVJU9 C: 3D141455 Note(s) PCB: Main PCB Refer to page 37 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 253 SiUS092231E Wiring Diagrams RXL18/24WMVJU9 C: 3D141469 Note(s) PCB1: Main PCB PCB2: Service monitor PCB Refer to page 38 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 254: Operation Limit
Operation Limit SiUS092231E 3. Operation Limit RXL09/15WMVJU9 3D100732A RXL12/18/24WMVJU9 3D123451 Part 8 Appendix...
Page 255 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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Daikin RXL-W Series Service Manual

Introduction

Part 1 General Information

Part 2 Specifications

Part 3 Printed Circuit Board Connector Wiring Diagram

Part 4 Functions and Control

Part 5 Remote Controller

Part 6 Service Diagnosis

Part 7 Trial Operation and Field Settings

Part 8 Appendix

Quick Links

Troubleshooting

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Summary of Contents for Daikin RXL-W Series