Daikin FTX-N Series Service Manual

Inverter pair: wall mounted type, floor standing type, duct connected type.

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Service manual (132 pages)

Engineering data (132 pages)

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Service

Manual

Inverter Pair

Wall Mounted Type FTX-N/U Series

Floor Standing Type FVXS-V Series

Duct Connected Type FDMQ-R Series

SiUS091601EA

[Applied Models]

Inverter Pair : Heat Pump

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Summary of Contents for Daikin FTX-N Series

Page 1 SiUS091601EA Service Manual Inverter Pair Wall Mounted Type FTX-N/U Series Floor Standing Type FVXS-V Series Duct Connected Type FDMQ-R Series [Applied Models] Inverter Pair : Heat Pump...
Page 2: Table Of Contents
SiUS091601EA 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. Applicable Models ..................10 2.
Page 3 SiUS091601EA 2.6 Thermostat Control..................53 2.7 NIGHT SET Mode ..................54 2.8 ECONO Operation ..................55 2.9 INTELLIGENT EYE Operation ..............56 2.10 POWERFUL Operation ................57 2.11 Clock Setting ....................58 2.12 WEEKLY TIMER Operation ............... 59 2.13 Other Functions..................65 3.
Page 4 SiUS091601EA 3.2 ARC466 Series..................114 3.3 BRC1E73 ....................117 3.4 BRC082A43 ..................... 119 4. Error Codes and Description..............123 5. Troubleshooting for FTX, FVXS Series...........124 5.1 Indoor Unit PCB Abnormality ..............124 5.2 Freeze-up Protection Control/Heating Peak-cut Control ......126 5.3 Indoor Fan Motor (DC Motor) or Related Abnormality ......128 5.4 Thermistor or Related Abnormality............
Page 5 SiUS091601EA 8.4 Electronic Expansion Valve Check............184 8.5 Four Way Valve Performance Check ............185 8.6 Inverter Unit Refrigerant System Check........... 185 8.7 Inverter Analyzer Check ................186 8.8 Rotation Pulse Check on the Outdoor Unit PCB ........189 8.9 Installation Condition Check..............190 8.10 Discharge Pressure Check...............
Page 6: Introduction
SiUS091601EA 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
SiUS091601EA 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 SiUS091601EA 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
SiUS091601EA 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 SiUS091601EA 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 SiUS091601EA 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 SiUS091601EA 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
SiUS091601EA Revision History 3. Revision History Month/Year Version Revised contents 02 / 2016 SiUS091601E First edition Model addition : 10 / 2019 SiUS091601EA FTX18/24UVJU, FDMQ12/18/24RVJU, RXL12QMVJU9, RXL18/24UMVJU Introduction...
Page 14: Part 1 General Information
SiUS091601EA Part 1 General Information 1. Applicable Models ..................10 2. Functions....................11 Part 1 General Information...
Page 15: Applicable Models
SiUS091601EA Applicable Models 1. Applicable Models Indoor Unit FTX09NMVJU FVXS09NVJU FDMQ12RVJU FTX12NMVJU FVXS12NVJU FDMQ18RVJU FTX15NMVJU FVXS15NVJU FDMQ24RVJU FTX18UVJU FTX24UVJU Outdoor Unit RXL09QMVJU RXL12QMVJU RXL12QMVJU9 RXL15QMVJU RXL18UMVJU RXL24UMVJU Part 1 General Information...
Page 16: Functions
Functions SiUS091601EA 2. Functions Category Functions FDMQ FVXS Wired Wireless 18/24 Basic Inverter (with inverter power control)        Function Operation limit Refer to page 236 PAM control        Standby electricity saving ...
Page 17 SiUS091601EA Functions Category Functions FDMQ FVXS Wired Wireless 18/24 Worry Free Auto-restart (after power failure)        (Reliability & Self-diagnosis (R/C, LED)        Durability) Anti-corrosion treatment of outdoor heat ...
Page 18: Part 2 Specifications
SiUS091601EA Part 2 Specifications 1. Specifications ....................14 Part 2 Specifications...
Page 19: Specifications
SiUS091601EA Specifications 1. Specifications Model Indoor Unit FTX09NMVJU FTX12NMVJU Outdoor Unit RXL09QMVJU RXL12QMVJU Cooling Heating Cooling Heating 1  , 60 Hz, 208 - 230 V 1  , 60 Hz, 208 - 230 V Power Supply Capacity Rated (Min. ~ Max.) 2.64 (1.30 ~ 3.20) 3.20 (1.30 ~ 4.70) 3.20 (1.30 ~ 3.90)
Page 20 Specifications SiUS091601EA Model Indoor Unit FTX12NMVJU FTX15NMVJU Outdoor Unit RXL12QMVJU9 RXL15QMVJU Cooling Heating Cooling Heating 1  , 60 Hz, 208 - 230 V 1  , 60 Hz, 208 - 230 V Power Supply Capacity Rated (Min. ~ Max.) 3.20 (1.30 ~ 3.90) 4.00 (1.30 ~ 5.50) 4.40 (1.70 ~ 5.40)
Page 21 SiUS091601EA Specifications Model Indoor Unit FTX18UVJU FTX24UVJU Outdoor Unit RXL18UMVJU RXL24UMVJU Cooling Heating Cooling Heating 1  , 60 Hz, 208 - 230 V 1  , 60 Hz, 208 - 230 V Power Supply Capacity Rated (Min. ~ Max.) Btu/h 18,000 (9,000 ~ 21,600) 21,600 (9,000 ~ 28,000)
Page 22 Specifications SiUS091601EA Model Indoor Unit FVXS09NVJU FVXS12NVJU Outdoor Unit RXL09QMVJU RXL12QMVJU Cooling Heating Cooling Heating 1  , 60 Hz, 208 - 230 V 1  , 60 Hz, 208 - 230 V Power Supply Capacity Rated (Min. ~ Max.) 2.64 (1.30 ~ 3.00) 2.95 (1.30 ~ 4.20) 3.00 (1.30 ~ 3.60)
Page 23 SiUS091601EA Specifications Model Indoor Unit FVXS12NVJU FVXS15NVJU Outdoor Unit RXL12QMVJU9 RXL15QMVJU Cooling Heating Cooling Heating 1  , 60 Hz, 208 - 230 V 1  , 60 Hz, 208 - 230 V Power Supply Capacity Rated (Min. ~ Max.) 3.00 (1.30 ~ 3.60) 3.80 (1.30 ~ 5.00) 4.40 (1.70 ~ 5.00)
Page 24 Specifications SiUS091601EA Model Indoor Unit FDMQ12RVJU FDMQ18RVJU Outdoor Unit RXL12QMVJU9 RXL18UMVJU Cooling Heating Cooling Heating 1  , 60 Hz, 208 - 230 V 1  , 60 Hz, 208 - 230 V Power Supply Capacity (Min. ~ Max.) 3.18 (1.91 ~ 3.87) 1 3.99 (1.85 ~ 4.98) 2 5.16 (2.64 ~ 5.92) 1 6.33 (2.64 ~ 7.33) 2...
Page 25 SiUS091601EA Specifications Model Indoor Unit FDMQ24RVJU Outdoor Unit RXL24UMVJU Cooling Heating 1  , 60 Hz, 208 - 230 V Power Supply Cooling Capacity (Min. ~ Max.) 6.21 (2.64 ~ 7.03) 1 7.02 (2.64 ~ 8.09) 2 4 Btu/h 21,200 (9,000 ~ 24,000) 1 24,000 (9,000 ~ 27,600) 2 kcal/h 5,340 (2,270 ~ 6,050) 1...
Page 26: Part 3 Printed Circuit Board Connector Wiring Diagram
SiUS091601EA Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................22 1.1 FTX09/12NMVJU ..................22 1.2 FTX15NMVJU .................... 24 1.3 FTX18/24UVJU ..................26 1.4 FVXS09/12/15NVJU................... 28 1.5 FDMQ12/18/24RVJU ................. 30 2. Wireless Remote Controller Receiver ............32 2.1 BRC082A43 ....................32 3.
Page 27: Indoor Unit
SiUS091601EA Indoor Unit 1. Indoor Unit FTX09/12NMVJU Control PCB Connector for swing motor (horizontal blade) (PCB1) Connector for display/signal receiver PCB (PCB2) Connector for indoor heat exchanger thermistor (R2T) S200 Connector for DC fan motor S403 Connector for adaptor PCB (option) H1, H2, H3, FG Connector for terminal strip Fuse (3.15 A, 250 V)
Page 28 Indoor Unit SiUS091601EA Display/Signal Connector for control PCB (PCB1) Receiver PCB SW1 (S1W) Indoor unit ON/OFF switch (PCB2) (Forced cooling operation ON/OFF switch) Refer to page 199 for details of forced cooling operation. LED1 (H1P) LED for operation (green) LED2 (H2P) LED for timer (yellow) RTH1 (R1T) Room temperature thermistor...
Page 29: Ftx15Nmvju
SiUS091601EA Indoor Unit FTX15NMVJU 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 adaptor PCB (option) S900 Connector for filter PCB (PCB1) S200 S403 S900...
Page 30 Indoor Unit SiUS091601EA 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 SW1 (S1W) Indoor unit ON/OFF switch (PCB3) (Forced cooling operation ON/OFF switch)
Page 31: Ftx18/24Uvju
SiUS091601EA Indoor Unit FTX18/24UVJU Control PCB Connector for DC fan motor (PCB1) Connector for centralized control (HA) Connector for INTELLIGENT EYE sensor PCB (PCB4) Indoor heat exchanger thermistor (R2T) Connector for swing motors Connector for display PCB (PCB3) Connector for signal receiver PCB (PCB2) H1, H2, H3, FG Connector for terminal strip Address setting jumper Refer to page 207 for details.
Page 32 Indoor Unit SiUS091601EA 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 199 for details of forced cooling operation. LED1 (H1P) LED for operation (green) LED2 (H2P)
Page 33: Fvxs09/12/15Nvju
SiUS091601EA Indoor Unit FVXS09/12/15NVJU Control PCB Connector for DC fan motor (PCB2) Connector for centralized control (HA) Connector for service PCB (PCB3) 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 Connector for terminal strip...
Page 34 Indoor Unit SiUS091601EA Sensor PCB Connector for control PCB (PCB2) (PCB1) RTH2 (R1T) Room temperature thermistor RTH2 3P191450-1 Service PCB Connector for control PCB (PCB2) (PCB3) SW2 (S2W)-4 Switch for upward airflow limit setting Refer to page 209 for details. ...
Page 35: Fdmq12/18/24Rvju
SiUS091601EA Indoor Unit FDMQ12/18/24RVJU 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 36 Indoor Unit SiUS091601EA 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 37: Wireless Remote Controller Receiver
SiUS091601EA Wireless Remote Controller Receiver 2. Wireless Remote Controller Receiver BRC082A43 Wired Remote MAIN/SUB setting switch Controller PCB Refer to page 214 for details. Address setting switch Refer to page 214 for details. P1, P2 Terminal for indoor unit control PCB (A1P) 3P156152-1 Part 3 Printed Circuit Board Connector Wiring Diagram...
Page 38: Wired Remote Controller
Wired Remote Controller SiUS091601EA 3. Wired Remote Controller BRC1E73 Wired Remote P1, P2 Terminal for indoor unit Controller PCB Room temperature thermistor 2P298037-7 Part 3 Printed Circuit Board Connector Wiring Diagram...
Page 39: Outdoor Unit
SiUS091601EA Outdoor Unit 4. Outdoor Unit RXL09QMVJU Main PCB (PCB1) Connector for electronic expansion valve coil Connector for compressor Connector for overload protector Connector for DC fan motor Connector for four way valve coil Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe) HL1, HN1, S Connector for terminal block E1, E2...
Page 40 Outdoor Unit SiUS091601EA HL1, HN1, S V150 E1, E2 LED A 2P415459-42 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 41: Rxl12Qmvju(9)
SiUS091601EA Outdoor Unit RXL12QMVJU(9) Main PCB Connector for electronic expansion valve coil Connector for overload protector Connector for DC fan motor Connector for four way valve coil Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe) HL1, HN1, S Connector for terminal block E1, E2 Terminal for ground wire...
Page 42 Outdoor Unit SiUS091601EA HL1, HN1, S E1, E2 LED A V150 U, V, W 2P381219-4 2P575834-12 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 43: Rxl15Qmvju
SiUS091601EA Outdoor Unit RXL15QMVJU Main PCB Connector for electronic expansion valve coil Connector for overload protector Connector for DC fan motor Connector for four way valve coil Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe) HL1, HN1, S Connector for terminal block E1, E2 Terminal for ground wire...
Page 44: Rxl18/24Umvju
Outdoor Unit SiUS091601EA RXL18/24UMVJU Main PCB (PCB1) Connector for terminal block (indoor - outdoor transmission) Connector for electronic expansion valve coil (White) Connector for overload protector Connector for DC fan motor Connector for four way valve coil Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe) S201, 202 Connector for service monitor PCB (PCB2)
Page 45 SiUS091601EA Outdoor Unit E1, E2 V401 S201 U, V, W S202 2P455785-14 Part 3 Printed Circuit Board Connector Wiring Diagram...
Page 46 Outdoor Unit SiUS091601EA Service Monitor S501, S502 Connector for main PCB (PCB1) PCB (PCB2) LED A LED for service monitor (green) SW5-3 Switch for facility setting Refer to page 217 for details. SW6-1 Switch for drain pan heater Refer to page 218 for details. LED A S501 SW5-3...
Page 47: Optional Adaptor
SiUS091601EA Optional Adaptor 5. Optional Adaptor BRP072A43 Wireless LAN Adaptor Wireless LAN Connector for [S21] or [S403] Adaptor PCB 3P356259-2 Note Connectors Models Connector FTX09/12/15NMVJU S403 FTX18/24UVJU FVXS series KRP067A41/KRP980B2 Remote Control PC-board Set Adaptor PCB Connector for wireless LAN adaptor PCB S601, S602 Connector for [S403] on indoor unit control PCB S602...
Page 48: Part 4 Functions And Control
SiUS091601EA Part 4 Functions and Control 1. Common Functions ...................44 1.1 Temperature Control .................. 44 1.2 Frequency Principle..................44 2. Functions for FTX, FVXS Series ...............46 2.1 Airflow Direction Control................46 2.2 COMFORT AIRFLOW Operation ............... 49 2.3 Fan Speed Control for Indoor Unit ............. 50 2.4 Program Dry Operation ................
Page 49: Common Functions
SiUS091601EA 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 50 Common Functions SiUS091601EA  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 51: Functions For Ftx, Fvxs Series
SiUS091601EA 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 52 Functions for FTX, FVXS Series SiUS091601EA FVXS series Flap (up and down) Cooling/Dry Heating Upward airflow limit OFF R4003397 R4003396 Upward airflow limit ON R4003394 R4003394 3-D Airflow FTX18/24UVJU only Alternative repetition of vertical and horizontal swing motions enables uniform air-conditioning of the entire room.
Page 53 SiUS091601EA 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 54: Comfort Airflow Operation
Functions for FTX, FVXS Series SiUS091601EA COMFORT AIRFLOW Operation Applicable FTX09/12/15NMVJU Models FTX18/24UVJU 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 55: Fan Speed Control For Indoor Unit
SiUS091601EA 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 56: Program Dry Operation
Functions for FTX, FVXS Series SiUS091601EA 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 57: Automatic Cooling/Heating Changeover
SiUS091601EA 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 58: Thermostat Control
Functions for FTX, FVXS Series SiUS091601EA 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 59: Night Set Mode
SiUS091601EA 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 60: Econo Operation
Functions for FTX, FVXS Series SiUS091601EA 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 61: Intelligent Eye Operation
SiUS091601EA Functions for FTX, FVXS Series INTELLIGENT EYE Operation Applicable FTX18/24UVJU Models Outline The microcomputer detects the presence of humans in the room with a motion sensor and reduces the capacity when there is nobody in the room in order to save electricity. Details 1.
Page 62: Powerful Operation
Functions for FTX, FVXS Series SiUS091601EA 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 63: Clock Setting
SiUS091601EA 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.  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 64: Weekly Timer Operation
Functions for FTX, FVXS Series SiUS091601EA 2.12 WEEKLY TIMER Operation Applicable FTX18/24UVJU Models FVXS09/12/15NVJU 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 65 SiUS091601EA 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 66 Functions for FTX, FVXS Series SiUS091601EA 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 67 SiUS091601EA 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 68 Functions for FTX, FVXS Series SiUS091601EA 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 69 SiUS091601EA 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 70: Other Functions
Functions for FTX, FVXS Series SiUS091601EA 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 71: Functions For Fdmq Series
SiUS091601EA 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 72: Program Dry Operation
Functions for FDMQ Series SiUS091601EA 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 73: Clock And Calender Setting (With Brc1E73)
SiUS091601EA Functions for FDMQ Series Clock and Calender 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 74 Functions for FDMQ Series SiUS091601EA 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 75: Schedule Timer Operation (With Brc1E73)
SiUS091601EA 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 76 Functions for FDMQ Series SiUS091601EA  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 77 SiUS091601EA 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 78: Drain Pump Control
Functions for FDMQ Series SiUS091601EA  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 79 SiUS091601EA 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 80: Hot Start Control (In Heating Operation Only)
Functions for FDMQ Series SiUS091601EA 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 81: Other Functions
SiUS091601EA 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 82: Thermistor Functions
Thermistor Functions SiUS091601EA 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: Control Specification
SiUS091601EA 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 SiUS091601EA (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: Controls At Mode Changing/Start-Up
SiUS091601EA 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 86 Control Specification SiUS091601EA 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 87: Discharge Pipe Temperature Control
SiUS091601EA 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 88: Input Current Control
Control Specification SiUS091601EA 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 89: Freeze-Up Protection Control
SiUS091601EA 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 The operating frequency limitation is judged with the indoor heat exchanger temperature.
Page 90: Outdoor Fan Control
Control Specification SiUS091601EA 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
SiUS091601EA Control Specification 5.10 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish defrosting. Details Conditions for Starting Defrost ...
Page 92: Electronic Expansion Valve Control
Control Specification SiUS091601EA 5.11 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 SiUS091601EA Control Specification 5.11.1 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. 5.11.2 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 SiUS091601EA 5.11.7 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
SiUS091601EA Control Specification 5.11.8 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
SiUS091601EA Part 5 Remote Controller 1. Applicable Remote Controller ..............92 2. ARC466A21 ....................93 3. ARC466A37 ....................95 4. ARC480A8 ....................97 5. BRC082A43 ....................98 6. BRC1E73 ....................100 Part 5 Remote Controller...
Page 97: Applicable Remote Controller
BRC1E73 FDMQ24RVJU 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 SiUS091601EA 2. ARC466A21 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 • T o use the remote controller, aim the transmitter at the indoor unit.
Page 99 SiUS091601EA ARC466A21 Open the Front Cover Mode button • Selects the operation mode. AUTO COOL HEAT 2 ECONO button • Starts ECONO operation. 3 Quiet button Swing button • Adjusts the airflow direction. • Starts OUTDOOR UNIT • When you press Swing QUIET operation.
Page 100: Arc466A37
ARC466A37 SiUS091601EA 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 SiUS091601EA 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 OUTDOOR UNIT...
Page 102: Arc480A8
ARC480A8 SiUS091601EA 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
SiUS091601EA 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 SiUS091601EA 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: Brc1E73
SiUS091601EA BRC1E73 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 106 BRC1E73 SiUS091601EA 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 107 SiUS091601EA BRC1E73 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 108 BRC1E73 SiUS091601EA 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 •...
Page 109 SiUS091601EA BRC1E73 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 110 BRC1E73 SiUS091601EA 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 111: Part 6 Service Diagnosis
SiUS091601EA Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items ........108 2. Troubleshooting with LED ...............109 2.1 Indoor Unit....................109 2.2 Outdoor Unit ..................... 110 3. Service Diagnosis ...................111 3.1 ARC480 Series..................111 3.2 ARC466 Series..................114 3.3 BRC1E73 ....................117 3.4 BRC082A43 .....................
Page 112 SiUS091601EA 7.7 Discharge Pipe Temperature Control............163 7.8 High Pressure Control in Cooling ............. 165 7.9 System Shutdown due to Temperature Abnormality in the Compressor ......................... 167 7.10 Compressor Sensor System Abnormality ..........168 7.11 Position Sensor Abnormality ..............169 7.12 Thermistor or Related Abnormality (Outdoor Unit)........
Page 113: General Problem Symptoms And Check Items
SiUS091601EA General Problem Symptoms and Check Items 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 114: Troubleshooting With Led
Troubleshooting with LED SiUS091601EA 2. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected.  A protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions.
Page 115: Outdoor Unit
SiUS091601EA Troubleshooting with LED FDMQ series with BRC082A43 For wireless remote controller, a receiver is installed. When the error occurs, the operation lamp on the receiver blinks. Operation lamp (red) R4003517 Outdoor Unit The outdoor unit has one green LED (LED A) on the PCB. When the microcomputer works in order, the LED A blinks.
Page 116: Service Diagnosis
Service Diagnosis SiUS091601EA 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 117 SiUS091601EA Service Diagnosis 3.1.2 Method 2 1. Press the center of TEMP button and OFF button at the same time. R6000668 5C is displayed on the LCD. R6000695 2. Select 5C (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 118 Service Diagnosis SiUS091601EA  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 FAN button. R6000669 The right-side number blinks. R6000697 7.
Page 119: Arc466 Series
SiUS091601EA Service Diagnosis 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 120 Service Diagnosis SiUS091601EA 3.2.2 Method 2 1. Press the center of Temp button and Mode button at the same time. (R24046) 5C is displayed on the LCD. (R11821) 2. Select 5C (service check) with Temp or Temp button. 3. Press Mode button to enter the service check mode. (R24047) The left-side number blinks.
Page 121 SiUS091601EA 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 123. 6. Press Mode button. (R24047) The right-side number blinks. (R11673) 7.
Page 122: Brc1E73
Service Diagnosis SiUS091601EA 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 123 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 124: Brc082A43
Service Diagnosis SiUS091601EA 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 125 SiUS091601EA Service Diagnosis 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 126 Service Diagnosis SiUS091601EA 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 127 SiUS091601EA Service Diagnosis 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 128: Error Codes And Description
Error Codes and Description SiUS091601EA 4. Error Codes and Description Reference Page Error Description Codes FVXS FDMQ System Normal — — — Refrigerant shortage — — — U0 Low-voltage detection or over-voltage detection Signal transmission error (between indoor unit and outdoor unit) Signal transmission error (between indoor unit —...
Page 129: Troubleshooting For Ftx, Fvxs Series
SiUS091601EA Troubleshooting for FTX, FVXS Series 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 130 Troubleshooting for FTX, FVXS Series SiUS091601EA Note Connectors FTX09/12NMVJU Terminal ~ Control PCB (H1, H2, H3) FTX18/24UVJU FVXS series FTX15NMVJU Terminal ~ Filter PCB (S100) Filter PCB (S800) ~ Control PCB (S900) Part 6 Service Diagnosis...
Page 131: Freeze-Up Protection Control/Heating Peak-Cut Control
SiUS091601EA Troubleshooting for FTX, FVXS Series 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 132 Troubleshooting for FTX, FVXS Series SiUS091601EA Reference Check No.01 Refer to P.181 Part 6 Service Diagnosis...
Page 133: Indoor Fan Motor (Dc Motor) Or Related Abnormality
SiUS091601EA Troubleshooting for FTX, FVXS 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 FTX, FVXS Series SiUS091601EA 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 135 SiUS091601EA Troubleshooting for FTX, FVXS Series Troubleshooting FTX18/24UVJU, FVXS Series 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 136 Troubleshooting for FTX, FVXS Series SiUS091601EA Note(s) The rotation pulse is the feedback signal from the indoor fan motor. Reference Check No.02 Refer to P.182 Part 6 Service Diagnosis...
Page 137: Thermistor Or Related Abnormality
SiUS091601EA Troubleshooting for FTX, FVXS Series 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 138: Low-Voltage Detection Or Over-Voltage Detection
Troubleshooting for FTX, FVXS Series SiUS091601EA 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 SiUS091601EA Troubleshooting for FTX, FVXS 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: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)
Troubleshooting for FTX, FVXS Series SiUS091601EA 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 SiUS091601EA Troubleshooting for FTX, FVXS 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: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)
Troubleshooting for FTX, FVXS Series SiUS091601EA 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 indoor/outdoor transmission signal. Detection Error Decision The pair type and multi type are interconnected.
Page 143: Troubleshooting For Fdmq Series
SiUS091601EA Troubleshooting for FDMQ Series 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 144: Drain Level Control System Abnormality
Troubleshooting for FDMQ Series SiUS091601EA 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: Indoor Fan Motor (Dc Motor) Or Related Abnormality
SiUS091601EA Troubleshooting for FDMQ Series 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 146 Troubleshooting for FDMQ Series SiUS091601EA 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: Indoor Fan Pcb Abnormality
SiUS091601EA Troubleshooting for FDMQ Series 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 148: Humidifier Or Related Abnormality
Troubleshooting for FDMQ Series SiUS091601EA 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 149: Thermistor Or Related Abnormality
SiUS091601EA Troubleshooting for FDMQ Series 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 150: Remote Controller Thermistor Abnormality
Troubleshooting for FDMQ Series SiUS091601EA 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 151: Low-Voltage Detection Or Over-Voltage Detection
SiUS091601EA Troubleshooting for FDMQ 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 152 Troubleshooting for FDMQ Series SiUS091601EA 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 153: Signal Transmission Error (Between Indoor And Outdoor Unit)
SiUS091601EA Troubleshooting for FDMQ Series 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 154 Troubleshooting for FDMQ Series SiUS091601EA 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 155: Signal Transmission Error (Between Indoor Unit And Remote Controller)
SiUS091601EA Troubleshooting for FDMQ Series 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 if signal transmission between indoor unit and remote controller (main and sub) is normal. Detection Error Decision Normal transmission does not continue for specified period.
Page 156: Signal Transmission Error (Between Main/Sub Remote Controllers)
Troubleshooting for FDMQ Series SiUS091601EA 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 if signal transmission between MAIN remote controller and SUB remote controller is normal. Detection Error Decision Normal transmission does not continue for specified period.
Page 157: Mismatching Of Indoor Unit And Outdoor Unit
SiUS091601EA Troubleshooting for FDMQ Series 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 158: Troubleshooting For Outdoor Unit
Troubleshooting for Outdoor Unit SiUS091601EA 7. Troubleshooting for Outdoor Unit Outdoor Unit PCB Abnormality Error Code Method of Error  The system checks if the microprocessor is working in order.  The system checks if the zero-cross signal comes in properly. Detection Error Decision ...
Page 159: Ol Activation (Compressor Overload)
SiUS091601EA Troubleshooting for Outdoor Unit OL Activation (Compressor Overload) Error Code Method of Error A compressor overload is detected through compressor OL. Detection Error Decision  If the error repeats, the system is shut down. Conditions  Reset condition: Continuous run for about 60 minutes without any other error Supposed ...
Page 160 Troubleshooting for Outdoor Unit SiUS091601EA Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Discharge pipe Insert the thermistor in thermistor disconnected? position. Check No. 01 Check the discharge pipe Replace the discharge pipe thermistor.
Page 161 SiUS091601EA Troubleshooting for Outdoor Unit Reference Check No.14 Refer to P.185 Part 6 Service Diagnosis...
Page 162: Compressor Lock
Troubleshooting for Outdoor Unit SiUS091601EA 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 163: Dc Fan Lock
SiUS091601EA 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 164: Input Overcurrent Detection
Troubleshooting for Outdoor Unit SiUS091601EA 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 165 SiUS091601EA Troubleshooting for Outdoor Unit Reference Check No.18 Refer to P.190 Part 6 Service Diagnosis...
Page 166: Four Way Valve Abnormality
Troubleshooting for Outdoor Unit SiUS091601EA 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 167 SiUS091601EA 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 168: Discharge Pipe Temperature Control
Troubleshooting for Outdoor Unit SiUS091601EA 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 169 SiUS091601EA Troubleshooting for Outdoor Unit Reference Check No.12 Refer to P.184 Reference Check No.14 Refer to P.185 Part 6 Service Diagnosis...
Page 170: High Pressure Control In Cooling
Troubleshooting for Outdoor Unit SiUS091601EA 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 171 SiUS091601EA 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 172: System Shutdown Due To Temperature Abnormality In The Compressor
Troubleshooting for Outdoor Unit SiUS091601EA 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 determined limit. Detection Error Decision Temperature exceeds the detection threshold of 127.5°C (261.5°F) during forced cooling operation. Conditions Supposed ...
Page 173: Compressor Sensor System Abnormality
SiUS091601EA Troubleshooting for Outdoor Unit 7.10 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 174: Position Sensor Abnormality
Troubleshooting for Outdoor Unit SiUS091601EA 7.11 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 175 SiUS091601EA 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 176 Troubleshooting for Outdoor Unit SiUS091601EA R6000565 Reference Check No.15 Refer to P.186 Reference Check No.18 Refer to P.190 Reference Check No.20 Refer to P.191 Part 6 Service Diagnosis...
Page 177: Thermistor Or Related Abnormality (Outdoor Unit)
SiUS091601EA Troubleshooting for Outdoor Unit 7.12 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 178 Troubleshooting for Outdoor Unit SiUS091601EA 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 179: Electrical Box Temperature Rise
SiUS091601EA Troubleshooting for Outdoor Unit 7.13 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 180 Troubleshooting for Outdoor Unit SiUS091601EA Reference Check No.19 Refer to P.191 Part 6 Service Diagnosis...
Page 181: Radiation Fin Temperature Rise
SiUS091601EA Troubleshooting for Outdoor Unit 7.14 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 182 Troubleshooting for Outdoor Unit SiUS091601EA 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 183: Output Overcurrent Detection
SiUS091601EA Troubleshooting for Outdoor Unit 7.15 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 184 Troubleshooting for Outdoor Unit SiUS091601EA 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 185: Signal Transmission Error On Outdoor Unit Pcb
SiUS091601EA Troubleshooting for Outdoor Unit 7.16 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 186: Check
Check SiUS091601EA 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 187: Indoor Fan Motor Connector Check
SiUS091601EA Check Indoor Fan Motor Connector Check Check No.03 FTX09/12/15NMVJU  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 188 Check SiUS091601EA Check No.02 FTX18/24UVJU, FVXS 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 189: Power Supply Waveform Check
SiUS091601EA Check 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 190: Four Way Valve Performance Check
Check SiUS091601EA 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 191: Inverter Analyzer Check
SiUS091601EA 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 192 Check SiUS091601EA FTX09/12/15NMVJU 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. OFF button (R23157) FTX18/24UVJU, FVXS series...
Page 193 SiUS091601EA Check FDMQ series 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 194: Rotation Pulse Check On The Outdoor Unit Pcb
Check SiUS091601EA Rotation Pulse Check on the Outdoor Unit PCB 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 195: Installation Condition Check
SiUS091601EA 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 196: Outdoor Fan System Check
Check SiUS091601EA 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 197 SiUS091601EA Check 12 class Multimeter (R23024) 15 class Multimeter (R25105) Part 6 Service Diagnosis...
Page 198 Check SiUS091601EA 18/24 class Multimeter (R24538) Part 6 Service Diagnosis...
Page 199: Power Module Check
SiUS091601EA Check 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 200 Check SiUS091601EA 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 201 SiUS091601EA Check 18/24 class DC– (R24539) Part 6 Service Diagnosis...
Page 202: Part 7 Trial Operation And Field Settings
SiUS091601EA Part 7 Trial Operation and Field Settings 1. Pump Down Operation................198 2. Forced Cooling Operation ...............199 3. Trial Operation ..................202 4. Field Settings for FTX, FVXS Series............206 4.1 Temperature Display Switch ..............206 4.2 When 2 Units are Installed in 1 Room............207 4.3 Jumper and Switch Settings..............
Page 203: Pump Down Operation
SiUS091601EA 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 204: Forced Cooling Operation
Forced Cooling Operation SiUS091601EA 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 205 SiUS091601EA Forced Cooling Operation  With remote controller FTX09/12/15NMVJU 1. Press center of TEMP button 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 206 Forced Cooling Operation SiUS091601EA For FDMQ series FDMQ 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 207: Trial Operation
SiUS091601EA Trial Operation 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 208 Trial Operation SiUS091601EA  ARC466 Series 1. Press On/Off button to turn on the system. 2. Press the center of Temp button and Mode button at the same time. 3. Select T (trial operation) with Tempor Tempbutton. 4. Press Mode button to start the trial operation. 5.
Page 209 SiUS091601EA Trial Operation 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 210 Trial Operation SiUS091601EA 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 211: Field Settings For Ftx, Fvxs Series
SiUS091601EA Field Settings for FTX, FVXS Series 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 212: When 2 Units Are Installed In 1 Room
Field Settings for FTX, FVXS Series SiUS091601EA 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. FTX09/12/15NMV 1.
Page 213 SiUS091601EA Field Settings for FTX, FVXS Series FTX18/24UVJU 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 214: Jumper And Switch Settings
Field Settings for FTX, FVXS Series SiUS091601EA 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. Caution Replace the remote controller if you cut a jumper unintentionally. Jumpers are necessary for electronic circuit.
Page 215: Field Settings For Fdmq Series
SiUS091601EA Field Settings for FDMQ Series 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 216 Field Settings for FDMQ Series SiUS091601EA 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 217 SiUS091601EA Field Settings for FDMQ Series 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 218: Overview Of Field Settings
Field Settings for FDMQ Series SiUS091601EA 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 219: Main/Sub And Address Setting For Wireless Remote Controller
SiUS091601EA Field Settings for FDMQ Series 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 220 Field Settings for FDMQ Series SiUS091601EA 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 221 SiUS091601EA Field Settings for FDMQ 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 from the wireless remote controller. Check what setting the customer needs and make the multiple setting as shown below.
Page 222: Field Settings For Outdoor Unit
Field Settings for Outdoor Unit SiUS091601EA 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 223: Drain Pan Heater
SiUS091601EA Field Settings for Outdoor Unit Drain Pan Heater When attaching the drain pan heater 1. Attach the drain pan heater in accordance with the installation manual included with the drain pan heater. 2. Turn on SW6-1 on the PCB. Remove the switch Screw...
Page 224: Silicone Grease On Power Transistor/Diode Bridge
Silicone Grease on Power Transistor/Diode Bridge SiUS091601EA 7. Silicone Grease on Power Transistor/Diode Bridge Outline Apply the specified silicone grease to the heat radiation part of a power transistor/diode bridge when you replace an outdoor unit PCB. The silicone grease encourages the heat radiation of a power transistor/diode bridge.
Page 225: Part 8 Appendix
SiUS091601EA Part 8 Appendix 1. Piping Diagrams..................221 1.1 Indoor Unit....................221 1.2 Outdoor Unit ..................... 223 2. Wiring Diagrams..................226 2.1 Indoor Unit....................226 2.2 Outdoor Unit ..................... 231 3. Operation Limit..................236 Part 8 Appendix...
Page 226: Piping Diagrams
Piping Diagrams SiUS091601EA 1. Piping Diagrams Indoor Unit FTX09/12NMVJU FTX15NMVJU 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 227 SiUS091601EA Piping Diagrams FVXS09/12NVJU FVXS15NVJU INDOOR UNIT INDOOR UNIT MUFFLER ASSY HEAT EXCHANGER MUFFLER ASSY HEAT EXCHANGER 1/4 CuT 1/4 CuT 9/32 CuT 9/32 CuT 1/4 CuT 1/4 CuT 1/4 CuT THERMISTOR THERMISTOR ON HEAT EXCH. ON HEAT EXCH. 1/4 CuT 1/4 CuT 1/4 CuT FIELD PIPING...
Page 228: Outdoor Unit
Piping Diagrams SiUS091601EA Outdoor Unit RXL09QMVJU 3D100008 RXL12QMVJU(9) 3D100009A Part 8 Appendix...
Page 229 SiUS091601EA Piping Diagrams RXL15QMVJU 3D100007 RXL18UMVJU 3D123368 Part 8 Appendix...
Page 230 Piping Diagrams SiUS091601EA RXL24UMVJU 3D107985A Part 8 Appendix...
Page 231: Wiring Diagrams
SiUS091601EA Wiring Diagrams 2. Wiring Diagrams Indoor Unit FTX09/12NMVJU 3D086429D Note(s) PCB1: Control PCB PCB2: Display/signal receiver PCB Refer to page 22 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 232 Wiring Diagrams SiUS091601EA FTX15NMVJU 3D090199B Note(s) PCB1: Filter PCB PCB2: Control PCB PCB3: Display/signal receiver PCB Refer to page 24 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 233 SiUS091601EA Wiring Diagrams FTX18/24UVJU C: 3D060942W Note(s) PCB1: Control PCB PCB2: Signal receiver PCB PCB3: Display PCB PCB4: INTELLIGENT EYE sensor PCB Refer to page 26 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 234 Wiring Diagrams SiUS091601EA FVXS09/12/15NVJU PCB3 PCB2 ® RECTIFIER S2W ( 4 ) 3.15A OUTDOOR GRN/YLW FIELD WIRING. MR10 WIRELESS TRANSMISSION REMOTE CIRCUIT CAUTION CONTROLLER PCB4 NOTE THAT OPERATION WILL SIGNAL RESTART AUTOMATICALLY IF RECEIVER THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK LED1 LED2 3.15A...
Page 235 SiUS091601EA Wiring Diagrams FDMQ12/18/24RVJU 3D112629A Note(s) A1P: Control PCB A2P: Indoor fan PCB Refer to page 30 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 236: Outdoor Unit
Wiring Diagrams SiUS091601EA Outdoor Unit RXL09QMVJU C: 3D099947 Note(s) PCB1: Main PCB Refer to page 34 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 237 SiUS091601EA Wiring Diagrams RXL12QMVJU C: 3D099948 Note(s) PCB: Main PCB Refer to page 36 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 238 Wiring Diagrams SiUS091601EA RXL12QMVJU9 C: 3D122861 Note(s) PCB: Main PCB Refer to page 36 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 239 SiUS091601EA Wiring Diagrams RXL15QMVJU C: 3D099952 Note(s) PCB: Main PCB Refer to page 38 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 240 Wiring Diagrams SiUS091601EA RXL18/24UMVJU C: 3D122866 Note(s) PCB1: Main PCB PCB2: Service monitor PCB Refer to page 39 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
Page 241: Operation Limit
SiUS091601EA Operation Limit 3. Operation Limit RXL09/12/15QMVJU 3D100732 RXL12QMVJU9, RXL18/24UMVJU 3D123451 Part 8 Appendix...
Page 242 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 FTX-N 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 FTX-N Series