Daikin 4MXL-T Series Service Manual
  1. Manuals
  2. Brands
  3. Daikin Manuals
  4. Air Conditioner
  5. 4MXL-T Series
  6. Service manual

Daikin 4MXL-T Series Service Manual

Multi-split type air conditioners
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Service
Manual
Multi-Split Type Air Conditioners
5MXS-T, 4MXL-T Series
SiUS121827E
[Applied Models]
Inverter Pair : Heat Pump

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 4MXL-T Series and is the answer not in the manual?

Questions and answers

Related Manuals for Daikin 4MXL-T Series

Summary of Contents for Daikin 4MXL-T Series

  • Page 1 SiUS121827E Service Manual Multi-Split Type Air Conditioners 5MXS-T, 4MXL-T Series [Applied Models] Inverter Pair : Heat Pump...

  • Page 2: Table Of Contents

    SiUS121827E 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 1.1 Heat Pump ....................
  • Page 3 SiUS121827E 2. RA Indoor Unit Functions ................61 2.1 Airflow Direction Control................61 2.2 Fan Speed Control for Indoor Unit ............. 64 2.3 Program Dry Operation ................65 2.4 Automatic Cooling/Heating Changeover ............ 66 2.5 Thermostat Control..................67 2.6 NIGHT SET Mode ..................68 2.7 ECONO Operation ..................
  • Page 4 SiUS121827E Part 5 Remote Controller .............. 122 1. Applicable Remote Controller ..............123 2. ARC466A36 ....................124 3. ARC452A21 ....................126 4. ARC452A23 ....................128 5. ARC466A21 ....................130 6. BRC944B2 Wired Remote Controller............132 7. BRC1E73 Wired Remote Controller............133 8. BRC082A43 Wireless Remote Controller ..........139 9.
  • Page 5 SiUS121827E 6.11 Signal Transmission Error (Between MAIN/SUB Remote Controllers) ..193 6.12 Mismatching of Indoor Unit and Outdoor Unit .......... 194 7. Troubleshooting for Outdoor Unit............195 7.1 Refrigerant Shortage ................195 7.2 Low-voltage Detection or Over-voltage Detection........198 7.3 Wiring Error Check Unexecuted............... 200 7.4 Unspecified Voltage (Between Indoor Unit and Outdoor Unit), Anti-icing Control in Other Rooms................
  • Page 6 SiUS121827E 5. Field Settings ..................256 5.1 RA Indoor Unit..................256 5.2 SA Indoor Unit ..................262 5.3 Outdoor Unit ..................... 274 6. Silicone Grease on Power Transistor/Diode Bridge........277 Part 8 Appendix ................278 1. Piping Diagrams..................279 1.1 Indoor Unit....................279 1.2 Outdoor Unit .....................

  • Page 7: Introduction

    SiUS121827E Introduction 1. Safety Cautions...................2 1.1 Warnings and Cautions Regarding Safety of Workers......... 2 1.2 Warnings and Cautions Regarding Safety of Users........4 2. Icons Used ....................7 3. Revision History ..................8 Introduction...

  • Page 8: Safety Cautions

    Safety Cautions SiUS121827E 1. Safety Cautions Be sure to read the following safety cautions before conducting repair work. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer. This manual is for the person in charge of maintenance and...
  • Page 9 SiUS121827E Safety Cautions Warning Be sure to discharge the capacitor completely before conducting repair work. The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit. A charged capacitor may cause an electrical shock. Do not turn the air conditioner on or off by plugging in or unplugging the power cable.

  • Page 10: Warnings And Cautions Regarding Safety Of Users

    Safety Cautions SiUS121827E Caution Be sure to check that the refrigerating cycle section has cooled down enough before conducting repair work. Working on the unit when the refrigerating cycle section is hot may cause burns. Conduct welding work in a well-ventilated place. Using the welder in an enclosed room may cause oxygen deficiency.
  • Page 11 SiUS121827E Safety Cautions Warning Do not mix air or gas other than the specified refrigerant (R-32 / R- 410A / R-22) in the refrigerant system. If air enters the refrigerant system, an excessively high pressure results, causing equipment damage and injury. If the refrigerant gas leaks, be sure to locate the leaking point and repair it before charging the refrigerant.
  • Page 12 Safety Cautions SiUS121827E Caution Be sure to measure insulation resistance after the repair, and make sure that the resistance is 1 MΩ or higher. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause water to enter the room and wet the furniture and floor.

  • Page 13: Icons Used

    SiUS121827E Icons Used 2. Icons Used The following icons are used to attract the attention of the reader to specific information. Icon Type of Description Information Warning Warning is used when there is danger of personal injury. Warning Caution Caution is used when there is danger that the reader, Caution through incorrect manipulation, may damage equipment, lose data, get an unexpected result or have to restart (part...

  • Page 14: Revision History

    Revision History SiUS121827E 3. Revision History Month/Year Version Revised contents 12 / 2018 SiUS121827E First edition Introduction...

  • Page 15: Part 1 General Information

    SiUS121827E Part 1 General Information 1. Applicable Models ..................10 1.1 Heat Pump ....................10 2. Functions....................11 2.1 RA Indoor Unit.................... 11 2.2 SA Indoor Unit .................... 17 2.3 Outdoor Unit ....................21 Part 1 General Information...

  • Page 16: Applicable Models

    Applicable Models SiUS121827E 1. Applicable Models Heat Pump Indoor Unit FTXR09TVJUW FDXS09LVJU FDMQ09RVJU FTXR09TVJUS FDXS12LVJU FDMQ12RVJU FTXR12TVJUW CDXS15LVJU FDMQ15RVJU FTXR12TVJUS CDXS18LVJU FDMQ18RVJU FTXR18TVJUW CDXS24LVJU FDMQ24RVJU FTXR18TVJUS FVXS09NVJU FFQ09Q2VJU CTXG09QVJUW FVXS12NVJU FFQ12Q2VJU CTXG09QVJUS FVXS15NVJU FFQ15Q2VJU CTXG12QVJUW FVXS18NVJU FFQ18Q2VJU CTXG12QVJUS CTXG18QVJUW CTXG18QVJUS CTXS07LVJU FTXS09LVJU FTXS12LVJU...

  • Page 17: Functions

    SiUS121827E Functions 2. Functions RA Indoor Unit Wall Mounted (Non Duct) Type Category Functions FTXR CTXG CTXS FTXS Basic Function Inverter (with inverter power control)     Comfortable Power-airflow flap (horizontal blade) — — — — Airflow Power-airflow dual flaps (horizontal blade) ...
  • Page 18 Functions SiUS121827E Wall Mounted (Non Duct) Type Category Functions FTXR CTXG CTXS FTXS Remote Remote control adaptor Option Option Option Option Control (normal open pulse contact) Remote control adaptor (normal open contact) Option Option Option Option DIII-NET compatible (adaptor) Option Option Option Option...
  • Page 19 SiUS121827E Functions L.S.P. Duct Connected Type FDXS CDXS Category Functions With With With With wired R/C wireless R/C wired R/C wireless R/C Basic Function Inverter (with inverter power control)     Comfortable Power-airflow flap (horizontal blade) — — —...
  • Page 20 Functions SiUS121827E L.S.P. Duct Connected Type FDXS CDXS Category Functions With With With With wired R/C wireless R/C wired R/C wireless R/C Remote Remote control adaptor Option Option Option Option Control (normal open pulse contact) Remote control adaptor (normal open contact) Option Option Option...
  • Page 21 SiUS121827E Functions Category Functions Floor Standing Type FVXS Basic Function Inverter  (with inverter power control) Comfortable Power-airflow flap (horizontal blade) — Airflow Power-airflow dual flaps (horizontal blade) — Power-airflow diffuser — Wide-angle louvers (vertical blades)  Auto-swing (up and down) ...
  • Page 22 Functions SiUS121827E Category Functions Floor Standing Type FVXS Remote Remote control adaptor Option Control (normal open pulse contact) Remote control adaptor (normal open contact) Option DIII-NET compatible (adaptor) Option Wireless LAN connection Option Remote Wireless  Controller Wired —  : Available —...

  • Page 23: Sa Indoor Unit

    SiUS121827E Functions SA Indoor Unit M.S.P. Duct Connected Type FDMQ Category Functions With With wired R/C wireless R/C Basic Function Inverter (with inverter power control)   Comfortable Power-airflow flap (horizontal blade) — — Airflow Power-airflow dual flaps (horizontal blade) —...
  • Page 24 Functions SiUS121827E M.S.P. Duct Connected Type FDMQ Category Functions With With wired R/C wireless R/C Flexibility Multi-split/split type compatible indoor unit   Flexible power supply correspondence — — High ceiling application — — Either side drain (right or left) —...
  • Page 25 SiUS121827E Functions Ceiling Mounted Type FFQ Decoration Panel Decoration panel Category Functions BYFQ60B3W1 BYFQ60C2W1W(S) With With With With wired R/C wireless R/C wired R/C wireless R/C Basic Inverter     Function (with inverter power control) Comfortable Power-airflow flap (horizontal blade) —...
  • Page 26 Functions SiUS121827E Ceiling Mounted Type FFQ Decoration Panel Decoration panel Category Functions BYFQ60B3W1 BYFQ60C2W1W(S) With With With With wired R/C wireless R/C wired R/C wireless R/C Remote Remote control adaptor — — — — Control (normal open pulse contact) Remote control adaptor —...

  • Page 27: Outdoor Unit

    SiUS121827E Functions Outdoor Unit Function 5MXS / 4MXL Inverter  (with inverter power control) Operation limit for cooling (°FDB) Refer to P.292 Operation limit for heating (°FWB) PAM control  Oval scroll compressor — Swing compressor  Rotary compressor — Reluctance DC motor ...

  • Page 28: Part 2 Specifications

    SiUS121827E Part 2 Specifications 1. Specifications ....................23 1.1 RA Indoor Unit.................... 23 1.2 SA Indoor Unit .................... 31 1.3 Outdoor Unit ....................34 Part 2 Specifications...

  • Page 29: Specifications

    SiUS121827E Specifications 1. Specifications RA Indoor Unit Model FTXR09TVJUW FTXR09TVJUWS Cooling Heating Cooling Heating 1 φ 1 φ Power Supply Phase Hz, V 60 Hz, 208 - 230 V 60 Hz, 208 - 230 V Rated Capacity 9 kBtu/h Class 9 kBtu/h Class Front Panel Color White...
  • Page 30 Specifications SiUS121827E Model FTXR18TVJUW FTXR18TVJUS Cooling Heating Cooling Heating Power Supply Phase 1 φ 1 φ Hz, V 60 Hz, 208 - 230 V 60 Hz, 208 - 230 V Rated Capacity 18 kBtu/h Class 18 kBtu/h Class Front Panel Color White Silver Airflow Rates...
  • Page 31 SiUS121827E Specifications Model CTXG12QVJUW CTXG12QVJUS Cooling Heating Cooling Heating Power Supply Phase 1 φ 1 φ Hz, V 60 Hz, 208 - 230 V 60 Hz, 208 - 230 V Rated Capacity 12 kBtu/h Class 12 kBtu/h Class Front Panel Color White Silver Airflow Rates...
  • Page 32 Specifications SiUS121827E Model CTXS07LVJU Cooling Heating Power Supply Phase 1 φ Hz, V 60 Hz, 208 - 230 V Rated Capacity 7 kBtu/h Class Front Panel Color White Airflow Rates 332 (9.4) 350 (9.9) 261 (7.4) 290 (8.2) /min) 194 (5.5) 233 (6.6) 145 (4.1) 219 (6.2)
  • Page 33 SiUS121827E Specifications Model FTXS15LVJU FTXS18LVJU Cooling Heating Cooling Heating Power Supply Phase 1 φ 1 φ Hz, V 60 Hz, 208 - 230 V 60 Hz, 208 - 230 V Rated Capacity 15 kBtu/h Class 18 kBtu/h Class Front Panel Color White White Airflow Rates...
  • Page 34 Specifications SiUS121827E Model FDXS09LVJU FDXS12LVJU Cooling Heating Cooling Heating Power Supply Phase 1 φ 1 φ Hz, V 60 Hz, 208 - 230 V 60 Hz, 208 - 230 V Rated Capacity 9 kBtu/h Class 12 kBtu/h Class External Static Pressure inAq (Pa) 0.12 (30) 0.12 (30)
  • Page 35 SiUS121827E Specifications Model CDXS24LVJU Cooling Heating Power Supply Phase 1 φ Hz, V 60 Hz, 208 - 230 V Rated Capacity 24 kBtu/h Class External Static Pressure O (Pa) 0.16 (40) Airflow Rates 565 (16.0) 565 (16.0) 523 (14.8) 523 (14.8) /min) 477 (13.5) 477 (13.5)
  • Page 36 Specifications SiUS121827E Model FVXS15NVJU FVXS18NVJU Cooling Heating Cooling Heating Power Supply Phase 1 φ 1 φ Hz, V 60 Hz, 208 - 230 V 60 Hz, 208 - 230 V Rated Capacity 15 kBtu/h Class 18 kBtu/h Class Front Panel Color White White Airflow Rates...

  • Page 37: Sa Indoor Unit

    SiUS121827E Specifications SA Indoor Unit Model FDMQ09RVJU FDMQ12RVJU Cooling Heating Cooling Heating Power Supply Phase 1 φ 1 φ Hz, V 60 Hz, 208 - 230 V 60 Hz, 208 - 230 V Rated Capacity 9 kBtu/h Class 12 kBtu/h Class Casing Color —...
  • Page 38 Specifications SiUS121827E Model FDMQ24RVJU Cooling Heating Power Supply Phase 1 φ Hz, V 60 Hz, 208 - 230 V Rated Capacity 24 kBtu/h Class Casing Color — Dimensions (H × W × D) in. (mm) 9-5/8 × 39-3/8 × 31-1/2 (245 × 1,000 × 800) Coil Type Cross Fin Coil...
  • Page 39 SiUS121827E Specifications Model FFQ15Q2VJU FFQ18Q2VJU Cooling Heating Cooling Heating Power Supply Phase 1 φ 1 φ Hz, V 60 Hz, 208 - 230 V 60 Hz, 208 - 230 V Rated Capacity 15 kBtu/h Class 18 kBtu/h Class Decoration Panel Model BYFQ60B3W1 BYFQ60B3W1...

  • Page 40: Outdoor Unit

    Specifications SiUS121827E Outdoor Unit Model 5MXS48TVJU Cooling Heating Power Supply Phase 1 φ Hz, V 60 Hz, 208 - 230 V 3.9 (Non-Ducted type connected) — 3.2 (Ducted type connected) 10.5 (Non-Ducted type connected) Btu/W·h — 8.6 (Ducted type connected) SEER / HSPF 20.2 (Non-Ducted type connected) 11.1 (Non-Ducted type connected)
  • Page 41 SiUS121827E Specifications Model 4MXL36TVJU Cooling Heating Power Supply Phase 1 φ Hz, V 60 Hz, 208 - 230 V 4.26 (Non-Ducted type connected) — 3.5 (Ducted type connected) 12.5 (Non-Ducted type connected) Btu/W·h — 11.0 (Ducted type connected) SEER / HSPF 21.7 (Non-Ducted type connected) 11.2 (Non-Ducted type connected) 16.9 (Ducted type connected)

  • Page 42: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiUS121827E Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................37 1.1 FTXR09/12/18TVJUW(S), CTXG09/12/18QVJUW(S) ....... 37 1.2 CTXS07LVJU, FTXS09/12LVJU ..............39 1.3 FTXS15/18/24LVJU ................... 41 1.4 FDXS09/12LVJU, CDXS15/18/24LVJU ............. 43 1.5 FVXS09/12/15/18NVJU................45 1.6 FDMQ09/12/15/18/24RVJU ............... 47 1.7 FFQ09/12/15/18Q2VJU................49 2.

  • Page 43: Indoor Unit

    SiUS121827E Indoor Unit 1. Indoor Unit FTXR09/12/18TVJUW(S), CTXG09/12/18QVJUW(S) Control PCB Connector for centralized control (HA) (A1P) Connector for INTELLIGENT EYE sensor PCB (A3P) Indoor heat exchanger thermistor Connector for swing motors Connector for reduction motor (front panel mechanism) and limit switch Connector for display/signal receiver PCB (A2P) S200...
  • Page 44 Indoor Unit SiUS121827E Display/Signal Connector for control PCB (A1P) Receiver PCB Connector for room temperature thermistor (A2P) Indoor unit ON/OFF switch LED for operation (multi-color) LED for INTELLIGENT EYE (green) Address setting jumper ∗ Refer to page 258 for details. 3P357402-2 Caution Replace the PCB if you cut a jumper unintentionally.

  • Page 45: Ctxs07Lvju, Ftxs09/12Lvju

    SiUS121827E Indoor Unit CTXS07LVJU, FTXS09/12LVJU Control PCB Connector for DC fan motor (PCB1) Connector for centralized control (HA) Connector for INTELLIGENT EYE sensor PCB (PCB4) Indoor heat exchanger thermistor 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 ∗...
  • Page 46 Indoor Unit SiUS121827E Signal Receiver Connector for control PCB (PCB1) PCB (PCB2) 3P210728-1 Display PCB Connector for control PCB (PCB1) (PCB3) Indoor unit ON/OFF switch LED1 (H1P) LED for operation (green) LED2 (H2P) LED for timer (yellow) LED3 (H3P) LED for INTELLIGENT EYE (green) RTH1 (R1T) Room temperature thermistor RTH1...

  • Page 47: Ftxs15/18/24Lvju

    SiUS121827E Indoor Unit FTXS15/18/24LVJU Control PCB Connector for DC fan motor (PCB1) Connector for centralized control (HA) Connector for INTELLIGENT EYE sensor PCB (PCB4) Indoor heat exchanger thermistor Connector for swing motors Connector for display PCB (PCB3) Connector for signal receiver PCB (PCB2) H1, H2, H3.
  • Page 48 Indoor Unit SiUS121827E Signal Receiver Connector for control PCB (PCB1) PCB (PCB2) 3P224121-1 Display PCB Connector for control PCB (PCB1) (PCB3) Indoor unit ON/OFF switch LED1 (H1P) LED for operation (green) LED2 (H2P) LED for timer (yellow) LED3 (H3P) LED for INTELLIGENT EYE (green) RTH1 (R1T) Room temperature thermistor RTH1...

  • Page 49: Fdxs09/12Lvju, Cdxs15/18/24Lvju

    SiUS121827E Indoor Unit FDXS09/12LVJU, CDXS15/18/24LVJU Control PCB Connector for AC fan motor (A1P) Connector for AC fan motor (Hall IC) Connector for centralized control (HA) Connector for display/signal receiver PCB (A2P) Connector for indoor heat exchanger thermistor H1, H2, H3 Connector for terminal block FG (GND) Connector for terminal block (ground)
  • Page 50 Indoor Unit SiUS121827E Display/Signal Connector for control PCB (A1P) Receiver PCB SW1 (S1W) Indoor unit ON/OFF switch (A2P) LED2 (H2P) LED for timer (yellow) LED3 (H3P) LED for operation (green) RTH1 (R1T) Room temperature thermistor LED3 LED2 RTH1 LED1 2P084375-1 LED 1 does not function.

  • Page 51: Fvxs09/12/15/18Nvju

    SiUS121827E Indoor Unit FVXS09/12/15/18NVJU Control PCB Connector for DC fan motor (PCB2) Connector for centralized control (HA) Connector for service PCB (PCB3) Indoor heat exchanger thermistor 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 52 Indoor Unit SiUS121827E 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 261 for details. ∗...

  • Page 53: Fdmq09/12/15/18/24Rvju

    SiUS121827E Indoor Unit FDMQ09/12/15/18/24RVJU Control PCB X15A Connector for float switch (A1P) X16A Connector for room temperature thermistor (suction air thermistor) X17A, X18A Connector for indoor heat exchanger thermistor X25A Connector for drain pump motor X27A Connector for terminal block (for power supply) X28A Connector for power supply wiring (option) X30A...
  • Page 54 Indoor Unit SiUS121827E Indoor Fan PCB Connector for control PCB (A1P) (A2P) Connector for reactor Connector for indoor 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 55: Ffq09/12/15/18Q2Vju

    SiUS121827E Indoor Unit FFQ09/12/15/18Q2VJU Control PCB X15A Connector for float switch (A1P) X16A Connector for room temperature thermistor (suction air thermistor) X17A, X18A Connector for indoor heat exchanger thermistor X20A Connector for DC fan motor X24A Connector for transmitter board (when the wireless remote controller (option) is used) X25A Connector for drain pump motor...

  • Page 56: Sensor Kit For Ffq Series

    Sensor Kit for FFQ Series SiUS121827E 2. Sensor Kit for FFQ Series BRYQ60A2W(S) Outline Thermopile sensor (A4P) Pyroelectric sensor (A5P) (R25074) Thermopile Sensor (A4P) Connector 3P262610-1 Pyroelectric Sensor (A5P) Connector 3P262611-1 Part 3 Printed Circuit Board Connector Wiring Diagram...

  • Page 57: Wired Remote Controller

    SiUS121827E Wired Remote Controller 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 58: Wireless Remote Controller Receiver For Fdmq Series

    Wireless Remote Controller Receiver for FDMQ series SiUS121827E 4. Wireless Remote Controller Receiver for FDMQ series BRC082A43 Wired Remote MAIN/SUB setting switch Controller PCB ∗ Refer to page 268 for details. Address setting switch ∗ Refer to page 268 for details. P1, P2 Terminal for indoor unit control PCB (A1P) 3P156152-1...

  • Page 59: Wireless Remote Controller Kit For Ffq Series

    SiUS121827E Wireless Remote Controller Kit for FFQ Series 5. Wireless Remote Controller Kit for FFQ Series BRC082A41W, BRC082A42W(S) Transmitter Connector for receiver (A3P) Board (A2P) Connector for control PCB (A1P) MAIN/SUB setting switch ∗ Refer to page 271 for details. Address setting switch ∗...

  • Page 60: Outdoor Unit

    Outdoor Unit SiUS121827E 6. Outdoor Unit Main PCB (PCB1) S, S10 Connector for terminal block (indoor - outdoor transmission) Connector for COOL/HEAT lock ∗ Refer to page 275 for details. S20 (white) Connector for electronic expansion valve coil A port S21 (red) Connector for electronic expansion valve coil B port S22 (blue)
  • Page 61 SiUS121827E Outdoor Unit FU10 V401 S202 S201 2P519836-1 Part 3 Printed Circuit Board Connector Wiring Diagram...
  • Page 62 Outdoor Unit SiUS121827E Service Monitor S501, S502 Connector for main PCB (PCB1) PCB (PCB2) LED A LED for service monitor (green) LED1, LED2, LED for service monitor (red) LED3, LED4, LED5 Forced cooling operation ON/OFF switch ∗ Refer to page 248 for details. Operation mode switch ∗...

  • Page 63: Part 4 Functions And Control

    SiUS121827E Part 4 Functions and Control 1. Common Functions ...................59 1.1 Temperature Control .................. 59 1.2 Frequency Principle..................59 2. RA Indoor Unit Functions ................61 2.1 Airflow Direction Control................61 2.2 Fan Speed Control for Indoor Unit ............. 64 2.3 Program Dry Operation ................65 2.4 Automatic Cooling/Heating Changeover ............
  • Page 64 SiUS121827E 4.10 Liquid Compression Protection Function..........114 4.11 Defrost Control ..................114 4.12 Low Hz High Pressure Limit ..............116 4.13 Electronic Expansion Valve Control ............116 4.14 Malfunctions ..................... 121 Part 4 Functions and Control...

  • Page 65: Common Functions

    SiUS121827E 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 66 Common Functions SiUS121827E  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 67: Ra Indoor Unit Functions

    SiUS121827E RA Indoor Unit Functions 2. RA Indoor Unit Functions Airflow Direction Control Applicable FTXR09/12/18TVJUW(S) CTXG09/12/18QVJUW(S) Models CTXS07LVJU FTXS09/12/15/18/24LVJU FVXS09/12/15/18NVJU 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.
  • Page 68 RA Indoor Unit Functions SiUS121827E FVXS series Flap (up and down) Cooling/Dry Heating Upward airflow limit OFF R4003397 R4003396 Upward airflow limit ON R4003394 R4003394 3-D Airflow FTXR, CTXG, CTXS, FTXS Series Alternative repetition of vertical and horizontal swing motions enables uniform air-conditioning of the entire room.
  • Page 69 SiUS121827E RA Indoor Unit Functions Airflow Selection FVXS Series Setting Airflow direction can be set with the airflow selection switch.  Open the front panel. „ Air is blown from the upper outlet only. The blow pattern is automatically decided „...

  • Page 70: Fan Speed Control For Indoor Unit

    RA Indoor Unit Functions SiUS121827E 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 71: Program Dry Operation

    SiUS121827E RA Indoor Unit Functions 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 72: Automatic Cooling/Heating Changeover

    RA Indoor Unit Functions SiUS121827E 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 73: Thermostat Control

    SiUS121827E RA Indoor Unit Functions FDXS, CDXS, FVXS Series Cooling Operation Target temperature + 2.5°C (+4.5°F) Target temperature – 2.0°C (–3.6°F) Target temperature + 1.5°C (+2.7°F) = Thermostat OFF = Thermostat OFF Target temperature – 3.0°C (–5.4°F) Heating Operation (R22000) Ex: When the target temperature is 25°C (77°F) Cooling →...

  • Page 74: Night Set Mode

    RA Indoor Unit Functions SiUS121827E CTXS, FTXS Series Room thermistor temperature – target temperature Zone A Zone A 2.0°C (3.6°F) 2.0°C (3.6°F) Zone B Zone B 1.5°C (2.7°F) Zone C Zone C 1.0°C (1.8°F) 0.5°C (0.9°F) (R24033) FDXS, CDXS, FVXS Series Room thermistor temperature –...

  • Page 75: Econo Operation

    SiUS121827E RA Indoor Unit Functions 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 button on the wireless remote controller.

  • Page 76: 2-Area Intelligent Eye Operation

    RA Indoor Unit Functions SiUS121827E 2-Area INTELLIGENT EYE Operation Applicable FTXR09/12/18TVJUW(S) Models CTXG09/12/18QVJUW(S) Outline The following functions can be performed by the microcomputer and a motion sensor. 1. Reduction of the capacity when there is nobody in the room in order to save electricity (energy saving operation) 2.
  • Page 77 SiUS121827E RA Indoor Unit Functions 2. Motions (in cooling) within within 20 min. within 20 min. 20 min. 20 min. Human detection signal ↑ ↑ ↑ Reset Reset Reset 1 ~ 2°C (1.8 ~ 3.6 °F) Target temperature Remote controller Sensor button Operation Set speed...

  • Page 78: Intelligent Eye Operation

    RA Indoor Unit Functions SiUS121827E INTELLIGENT EYE Operation Applicable CTXS07LVJU Models FTXS09/12/15/18/24LVJU 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 79: Powerful Operation

    SiUS121827E RA Indoor Unit Functions 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 80: Multi-Monitor Lamp/Timer Lamp

    RA Indoor Unit Functions SiUS121827E 2.11 Multi-Monitor Lamp/TIMER Lamp Applicable FTXR09/12/18TVJUW(S) Models CTXG09/12/18QVJUW(S) Features Current operation mode is displayed in color of the lamp of the indoor unit. Operating status can be monitored even in automatic operation in accordance with the actual operation mode. Multi-monitor lamp/ TIMER lamp (R19925)

  • Page 81: Clock Setting

    SiUS121827E RA Indoor Unit Functions 2.12 Clock Setting ARC452 Series The clock can be set by taking the following steps: ARC466 Series 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 82: Weekly Timer Operation

    RA Indoor Unit Functions SiUS121827E 2.13 WEEKLY TIMER Operation Applicable FTXR09/12/18TVJUW(S) Models CTXG09/12/18QVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU FVXS09/12/15/18NVJU 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 FTXR and CTXG series as representative.
  • Page 83 SiUS121827E RA Indoor Unit Functions To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. program 1 program 2 program 3 program 4 [Monday] 77°F (25°C)
  • Page 84 RA Indoor Unit Functions SiUS121827E 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 85 SiUS121827E RA Indoor Unit Functions Copy mode • A reservation made once can be copied to another day of the week. The whole reservation of the selected day of the week will be copied. program 1 program 2 program 3 program 4 [Monday] 77°F (25°C)
  • Page 86 RA Indoor Unit Functions SiUS121827E 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 87 SiUS121827E RA Indoor Unit Functions To delete reservations An individual reservation Press • The day of the week and the reservation number will be displayed. Press to select the day of the week and the reservation number to be deleted. Press •...

  • Page 88: Other Functions

    RA Indoor Unit Functions SiUS121827E 2.14 Other Functions 2.14.1 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 89 SiUS121827E RA Indoor Unit Functions FVXS Series ON/OFF switch (R23926) 2.14.4 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 90: Sa Indoor Unit Functions

    SA Indoor Unit Functions SiUS121827E 3. SA Indoor Unit Functions Airflow Direction Control Applicable FFQ09/12/15/18Q2VJU Models Outline There are two types of airflow direction settings.  Automatic swing setting The flaps automatically oscillate up and down. Indoor unit (Automatic swing) (Automatic swing) (R24069) ...

  • Page 91: Fan Speed Control For Indoor Unit

    SiUS121827E SA Indoor Unit Functions 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 92: Program Dry Operation

    SA Indoor Unit Functions SiUS121827E 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 93: Clock And Calendar Setting (With Wired Remote Controller Brc1E73)

    SiUS121827E SA Indoor Unit Functions Clock and Calendar Setting (With Wired Remote Controller 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 &...
  • Page 94 SA Indoor Unit Functions SiUS121827E 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 95: Schedule Timer Operation (With Wired Remote Controller Brc1E73)

    SiUS121827E SA Indoor Unit Functions Schedule TIMER Operation (With Wired Remote Controller 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.
  • Page 96 SA Indoor Unit Functions SiUS121827E  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 97 SiUS121827E SA Indoor Unit Functions  Settings The schedule screen will appear. Press buttons to select Settings on the schedule screen. The settings screen will appear when Menu/OK button is pressed. Press buttons to select the day to be set. * It cannot be selected in the case of EVDY Input the time for the selected day.
  • Page 98 SA Indoor Unit Functions SiUS121827E 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 99: Setback Function (With Wired Remote Controller Brc1E73)

    SiUS121827E SA Indoor Unit Functions  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 100: Drain Pump Control

    SA Indoor Unit Functions SiUS121827E Drain Pump Control Normal Operation Float switch Thermostat (running) Error display Drain pump (R24037)  The float switch is ON in normal operation.  When cooling operation starts (thermostat ON), the drain pump turns ON simultaneously. ...
  • Page 101 SiUS121827E SA Indoor Unit Functions If Float Switch is OFF with Thermostat OFF in Cooling Operation Float switch Thermostat (running) Error display Drain pump 5 sec. 5 min. 5 sec. 5 min. 5 sec. 5 min. (R24611)  When the float switch stays OFF for 5 sec., the drain pump turns ON. ...

  • Page 102: Hot Start Control (In Heating Operation Only)

    SA Indoor Unit Functions SiUS121827E Hot Start Control (In Heating Operation Only) Outline At startup with thermostat ON or after the completion of defrosting in heating operation, the indoor unit fan is controlled to prevent cold air from blasting out and ensure startup capacity. Details Defrost ending or oil return ending Hot start ending conditions...

  • Page 103: Presence And Floor Sensors (Option)

    SiUS121827E SA Indoor Unit Functions Presence and Floor Sensors (Option) Applicable FFQ09/12/15/18Q2VJU Models Outline With the human presence signal and the floor temperature signal from the optional sensor kit, the system provides the energy saving control, or the comfortable temperature control and airflow direction control preventing the direct draft to the human.
  • Page 104 SA Indoor Unit Functions SiUS121827E 2. Auto-setback by sensor (with presence sensor) After pre-determined time has elapsed without detection of human presence, the unit automatically shifts the target temperature gradually for energy saving. The target temperature displayed on the remote controller remains same as the initial set value during the above change of target temperature.
  • Page 105 SiUS121827E SA Indoor Unit Functions 3. Auto-off by sensor (with presence sensor) After pre-determined time has elapsed without detection of human presence, the unit automatically stops operation. The auto-off time can be set between 1- 24 hours by the hour. Once the unit stops operation by auto-off function, the system would not restart even if the human is detected again.

  • Page 106: Other Functions

    SA Indoor Unit Functions SiUS121827E 4. Room temperature adjustment by sensing (with floor sensor) The system uses living space temperature calculated from temperatures detected by room temperature thermistor (suction air thermistor in the indoor unit) and floor sensor, as the target temperature.
  • Page 107 SiUS121827E SA Indoor Unit Functions FFQ Series Emergency operation switch (R24077) Part 4 Functions and Control...

  • Page 108: Control Specification

    Control Specification SiUS121827E 4. Control Specification Thermistor Functions Expansion valve (3) Outdoor (5) Liquid Pipe Temperature Thermistor Thermistor (2) Outdoor Heat Exchanger Thermistor Fusible plug Four way valve (1) Discharge Pipe Thermistor (7) Room (6) Indoor Heat Compressor Temperature Exchanger Thermistor Thermistor (4) Gas Pipe...
  • Page 109 SiUS121827E Control Specification  In case of low outdoor temperature operation, the system compares the indoor heat exchanger temperature with the liquid pipe temperature to detect disturbances in the refrigerant flow. If any, the system adjusts the opening of the electronic expansion valve to control the refrigerant flow.

  • Page 110: Mode Hierarchy

    Control Specification SiUS121827E 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) Forced heating operation Wiring error check operation Power transistor test mode...

  • Page 111: Frequency Control

    SiUS121827E Control Specification Frequency Control Outline Frequency corresponding to each room’s capacity is determined according to the difference between the target temperature and the temperature of each room. When the shift of the frequency is less than zero (ΔF<0) by PI control, the target frequency is used as the command frequency.
  • Page 112 Control Specification SiUS121827E ΔD signal: Indoor frequency command The difference between the room thermistor temperature and the target temperature is taken as the ΔD value and is used for ΔD signal of frequency command. ΔD ΔD ΔD ΔD Temperature Temperature Temperature Temperature difference...

  • Page 113: Controls At Mode Changing/Start-Up

    SiUS121827E Control Specification Controls at Mode Changing/Start-up 4.4.1 Preheating Control Outline The inverter operation in open phase starts with the conditions of the outdoor temperature and the preheating command from the indoor unit. Details ON Condition  When the outdoor temperature is below 6°C (42.8°F), the inverter operation in open phase starts.
  • Page 114 Control Specification SiUS121827E 4.4.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. (The function is not used when defrosting.) (Hz) Frequency (sec.) Time (R23251) Cooling Heating A (Hz) B (Hz) C (Hz) D (Hz)

  • Page 115: Discharge Pipe Temperature Control

    SiUS121827E 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 116: Input Current Control

    Control Specification SiUS121827E 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 117: Freeze-Up Protection Control

    SiUS121827E Control Specification Freeze-up Protection Control 4.7.1 Freeze-up Protection Control (Except FDMQ Series) Applicable FTXR09/12/18TVJUW(S) Models CTXG09/12/18QVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU FDXS09/12LVJU CDXS15/18/24LVJU FVXS09/12/15/18NVJU FFQ09/12/15/18Q2VJU 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 is divided into zones.
  • Page 118 Control Specification SiUS121827E 4.7.2 Freeze-up Protection Control for FDMQ Series Outline During cooling operation, the signal sent from the indoor unit determines the frequency upper limit and prevents the indoor heat exchanger from freezing. Details When the freeze-up protection control starts, the compressor stops, the airflow rate is fixed to L tap, and the drain pump turns ON.

  • Page 119: Heating Peak-Cut Control

    SiUS121827E Control Specification Heating Peak-cut Control Outline During heating operation, the indoor heat exchanger temperature determines the frequency upper limit to prevent abnormal high pressure. Details  The operating frequency is judged with the indoor heat exchanger temperature 2 minutes after the operation starts and F seconds after the number of the rooms in operation is changed.

  • Page 120: Outdoor Fan Control

    Control Specification SiUS121827E Outdoor Fan Control 1. Fan OFF control during defrosting The outdoor fan is turned OFF while defrosting. 2. Fan OFF delay when stopped The outdoor fan is turned OFF 60 seconds after the compressor stops. 3. Fan speed control for pressure difference upkeep The rotation speed of the outdoor fan is controlled for keeping the pressure difference during cooling operation with low outdoor temperature.
  • Page 121 SiUS121827E Control Specification E Hz D Hz PI control Frequency 0 Hz 0 Hz G sec. F sec. H sec. J sec. Compressor Four way valve 5 sec. 5 sec. Electronic expansion valve Starting Normal K pulse L pulse M pulse N pulse opening control...

  • Page 122: Low Hz High Pressure Limit

    Control Specification SiUS121827E 4.12 Low Hz High Pressure Limit Outline The system controls the upper limit of the frequency to prevent abnormal high pressure while the frequency is low. Control is carried out according to three zones. Details Dropping zone Reset zone Keep zone...
  • Page 123 SiUS121827E Control Specification Details The following are the examples of the electronic expansion valve control for each operation mode. Operation pattern  : Available — : Not available When power is turned on Fully closed when power is turned on —...
  • Page 124 Control Specification SiUS121827E 4.13.1 Initialization as Power Supply On The electronic expansion valve is initialized (fully closed) when the power is turned on. Then, the valve opening position is set and the pressure is equalized. 4.13.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalizing control is activated. The electronic expansion valve opens, and develops the pressure equalization.
  • Page 125 SiUS121827E Control Specification 4.13.8 Discharge Pipe Thermistor Disconnection Control Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensing temperature. If the discharge pipe thermistor is disconnected, the electronic expansion valve opens according to the outdoor temperature and the operation frequency, operates for a specified time, and then stops.
  • Page 126 Control Specification SiUS121827E 4.13.11 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 127: Malfunctions

    SiUS121827E Control Specification 4.14 Malfunctions 4.14.1 Sensor Malfunction Detection Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Radiation fin thermistor 4. Gas pipe thermistor 5. Outdoor temperature thermistor 6. Liquid pipe thermistor 4.14.2 Detection of Overcurrent and Overload Outline In order to protect the inverter, an excessive output current is detected and the OL temperature is observed to protect the compressor.

  • Page 128: Part 5 Remote Controller

    SiUS121827E Part 5 Remote Controller 1. Applicable Remote Controller ..............123 2. ARC466A36 ....................124 3. ARC452A21 ....................126 4. ARC452A23 ....................128 5. ARC466A21 ....................130 6. BRC944B2 Wired Remote Controller............132 7. BRC1E73 Wired Remote Controller............133 8. BRC082A43 Wireless Remote Controller ..........139 9. BRC082A41W, BRC082A42W(S) Wireless Remote Controller....141 Part 5 Remote Controller...

  • Page 129: Applicable Remote Controller

    FFQ15Q2VJU FFQ18Q2VJU 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 130: Arc466A36

    ARC466A36 SiUS121827E 2. ARC466A36 Signal transmitter Receiver 19-11/16” Display (LCD) (50 cm) or more • Displays the current settings. (In this illustration, each section is shown with all its displays on for the • T o use the remote controller, aim the purpose of explanation.) transmitter at the indoor unit.
  • Page 131 SiUS121827E ARC466A36 Open the Front Cover Mode button • Selects the operation mode. AUTO COOL HEAT 4 Econo / Quiet button • Every time you press Econo/Quiet button, the setting changes in the following order. Lamp brightness ECONO OUTDOOR UNIT setting button QUIET •...

  • Page 132: Arc452A21

    ARC452A21 SiUS121827E 3. ARC452A21 Signal transmitter Receiver Display (LCD) • Displays the current settings. • To use the remote controller, aim the (In this illustration, each section is transmitter at the indoor unit. If there shown with all its displays on for the is anything to block signals between purpose of explanation.) the unit and the remote controller,...
  • Page 133 SiUS121827E ARC452A21 Open the Front Cover MODE button • Selects the operation mode. AUTO COOL HEAT 4 ECONO button • Starts ECONO operation. QUIET button 5 SWING buttons • Starts OUTDOOR UNIT • Adjusts the airflow direction. QUIET operation. • When you press SWING •...

  • Page 134: Arc452A23

    ARC452A23 SiUS121827E 4. ARC452A23 Signal transmitter Display (LCD) Receiver • Displays the current settings. • To use the remote controller, aim the (In this illustration, each section is transmitter at the indoor unit. If there shown with all its displays on for the is anything to block signals between purpose of explanation.) the unit and the remote controller,...
  • Page 135 SiUS121827E ARC452A23 Open the Front Cover MODE button • Selects the operation mode. AUTO COOL HEAT 2 ECONO button • Starts ECONO operation. QUIET button • Starts OUTDOOR UNIT QUIET operation. SELECT button • OUTDOOR UNIT QUIET • Changes the ON/OFF TIMER operation is not available in settings.

  • Page 136: Arc466A21

    ARC466A21 SiUS121827E 5. 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 137 SiUS121827E ARC466A21 Open the Front Cover Mode button • Selects the operation mode. AUTO COOL HEAT 2 Econo button • Starts ECONO operation. Quiet button 3 Swing button • Starts OUTDOOR UNIT • Adjusts the airflow direction. QUIET operation. • When you press Swing •...

  • Page 138: Brc944B2 Wired Remote Controller

    BRC944B2 Wired Remote Controller SiUS121827E 6. BRC944B2 Wired Remote Controller 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 139: Brc1E73 Wired Remote Controller

    SiUS121827E BRC1E73 Wired Remote Controller 7. BRC1E73 Wired Remote Controller 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.
  • Page 140 BRC1E73 Wired Remote Controller SiUS121827E 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 141 SiUS121827E BRC1E73 Wired Remote Controller 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...
  • Page 142 BRC1E73 Wired Remote Controller SiUS121827E 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 143 SiUS121827E BRC1E73 Wired Remote Controller 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 144 BRC1E73 Wired Remote Controller SiUS121827E 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 145: Brc082A43 Wireless Remote Controller

    SiUS121827E BRC082A43 Wireless Remote Controller 8. BRC082A43 Wireless Remote Controller 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 146 BRC082A43 Wireless Remote Controller SiUS121827E 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 147: Brc082A41W, Brc082A42W(S) Wireless Remote Controller

    SiUS121827E BRC082A41W, BRC082A42W(S) Wireless Remote Controller 9. BRC082A41W, BRC082A42W(S) Wireless Remote Controller (R23936) (R23937) Part 5 Remote Controller...
  • Page 148 BRC082A41W, BRC082A42W(S) Wireless Remote Controller SiUS121827E TIMER MODE START/STOP BUTTON DISPLAY (SIGNAL TRANSMISSION) TIMER RESERVE/CANCEL BUTTON This lights up when a signal is being transmitted. AIRFLOW DIRECTION ADJUST BUTTON DISPLAY OPERATION MODE SELECTOR BUTTON (OPERATION MODE) Press this button to select OPERATION MODE. This display shows the current OPERATION MODE.

  • Page 149: Part 6 Service Diagnosis

    SiUS121827E Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items ........145 2. Troubleshooting with LED ...............146 2.1 Indoor Unit....................146 2.2 Outdoor Unit ..................... 149 3. Service Diagnosis ...................150 3.1 ARC452 Series Wireless Remote Controller..........150 3.2 ARC466 Series Wireless Remote Controller..........153 3.3 BRC1E73 Wired Remote Controller............
  • Page 150 SiUS121827E 7.3 Wiring Error Check Unexecuted............... 200 7.4 Unspecified Voltage (Between Indoor Unit and Outdoor Unit), Anti-icing Control in Other Rooms................201 7.5 Anti-icing Control for Indoor Unit .............. 202 7.6 Outdoor Unit PCB Abnormality..............204 7.7 OL Activation (Compressor Overload) ............. 205 7.8 Compressor Lock ..................

  • Page 151: General Problem Symptoms And Check Items

    SiUS121827E General Problem Symptoms and Check Items 1. General Problem Symptoms and Check Items Reference Symptom Check Item Details Page None of the units Check the power supply. Check if the rated voltage is supplied. — operates. Check the types of the indoor Check if the indoor unit type is —...

  • Page 152: Troubleshooting With Led

    Troubleshooting with LED SiUS121827E 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 153 SiUS121827E Troubleshooting with LED FVXS Series Operation lamp (green) R4003515 FDMQ, FFQ series with BRC1E73 wired remote controller Operation lamp (green) #The error or warning message also blinks on the basic screen. R4003516 FDMQ series with BRC082A43 wireless remote controller In case of wireless remote controller, a receiver is installed.
  • Page 154 Troubleshooting with LED SiUS121827E Operation lamp (red) R4003518 Caution When operation stops suddenly and the operation lamp blinks, it could be operation mode conflict. For FFQ models, even if the operation mode conflict occurs, the operation lamp does not blink. 1.

  • Page 155: Outdoor Unit

    SiUS121827E Troubleshooting with LED Outdoor Unit The outdoor unit has a green LED (LED A) and red LEDs (LED 1 ~ LED 5) on the PCB. When the microcomputer works in order, the LED A blinks, and when the system is in normal condition, the red LEDs are OFF.

  • Page 156: Service Diagnosis

    Service Diagnosis SiUS121827E 3. Service Diagnosis ARC452 Series Wireless Remote Controller 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 <...
  • Page 157 SiUS121827E Service Diagnosis 3.1.2 Method 2 1. Press the 3 buttons (TEMP, TEMP, MODE) at the same time to enter the diagnosis mode. (R14550) The left-side number blinks. (R9430) 2. Press TEMP or TEMP button and change the number until you hear the two consecutive beeps or the long beep.
  • Page 158 Service Diagnosis SiUS121827E 5. Press TEMP or TEMP button and change the number until you hear the long beep. (R14547) 6. Diagnose by the sound.  Beep: The left-side number does not correspond with the error code.  Two consecutive beeps: The left-side number corresponds with the error code but the right- side number does not.

  • Page 159: Arc466 Series Wireless Remote Controller

    SiUS121827E Service Diagnosis ARC466 Series Wireless Remote Controller 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 160 Service Diagnosis SiUS121827E 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 161 SiUS121827E 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 162, 163. 6. Press Mode button. (R24047) The right-side number blinks.

  • Page 162: Brc1E73 Wired Remote Controller

    Service Diagnosis SiUS121827E BRC1E73 Wired Remote Controller 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.
  • Page 163 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 164: Brc082A43, Brc082A41W, Brc082A42W(S) Wireless Remote Controller

    Service Diagnosis SiUS121827E BRC082A43, BRC082A41W, BRC082A42W(S) Wireless Remote Controller 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...
  • Page 165 SiUS121827E 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 166 Service Diagnosis SiUS121827E 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 167 SiUS121827E 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 168: Code Indication On Remote Controller

    Code Indication on Remote Controller SiUS121827E 4. Code Indication on Remote Controller RA Indoor Unit Error Reference Description Codes Page Normal condition — Indoor unit PCB abnormality Freeze-up protection control/heating peak-cut control Indoor fan motor or related DC motor abnormality (FTXR, CTXG, CTXS, FTXS, FVXS series) AC motor (FDXS, CDXS series) Indoor heat exchanger thermistor or related abnormality...

  • Page 169: Outdoor Unit

    SiUS121827E Code Indication on Remote Controller Outdoor Unit i: ON, h: OFF, j: Blinks Outdoor Unit LED Indication Error Reference Description Green Codes Page Normal condition — Unspecified voltage (between indoor unit and outdoor unit) Anti-icing control in other rooms (U0) Refrigerant shortage Low-voltage detection or over-voltage...

  • Page 170: Troubleshooting For Ra Indoor Unit

    Troubleshooting for RA Indoor Unit SiUS121827E 5. Troubleshooting for RA Indoor Unit 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 171 SiUS121827E Troubleshooting for RA Indoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Combination of the Match the compatible indoor and outdoor unit models. matched? ∗ To secure the connection, Check the connection of disconnect the connectors once connectors.

  • Page 172: Freeze-Up Protection Control/Heating Peak-Cut Control

    Troubleshooting for RA Indoor Unit SiUS121827E 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 173: Indoor Fan Motor Or Related Abnormality

    SiUS121827E Troubleshooting for RA Indoor Unit Indoor Fan Motor or Related Abnormality 5.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable FTXR09/12/18TVJUW(S) Models CTXG09/12/18QVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU FVXS09/12/15/18NVJU Error Code Method of Error The rotation speed detected by the Hall IC during indoor fan motor operation determines abnormal Detection fan motor operation.
  • Page 174 Troubleshooting for RA Indoor Unit SiUS121827E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation Correct the power within ±10% from supply.
  • Page 175 SiUS121827E Troubleshooting for RA Indoor Unit Note The rotation pulse is the feedback signal from the indoor fan motor. Reference Check No.02 Refer to P. 233 Part 6 Service Diagnosis...
  • Page 176 Troubleshooting for RA Indoor Unit SiUS121827E 5.3.2 Indoor Fan Motor (AC Motor) or Related Abnormality Applicable FDXS09/12LVJU Models CDXS15/18/24LVJU Error Code Method of Error The rotation speed detected by the Hall IC during indoor fan motor operation determines abnormal Detection fan motor operation.
  • Page 177 SiUS121827E Troubleshooting for RA Indoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% Correct the power supply. from the rated value? Start operation.

  • Page 178: Thermistor Or Related Abnormality

    Troubleshooting for RA Indoor Unit SiUS121827E 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 179: Front Panel Open/Close Fault

    SiUS121827E Troubleshooting for RA Indoor Unit Front Panel Open/Close Fault Applicable FTXR09/12/18TVJUW(S), Models CTXG09/12/18QVJUW(S) Error Code Error Decision  If the error repeats, the system is shut down. Conditions Supposed  Defective reduction motor Causes  Malfunction or deterioration of the front panel mechanism ...

  • Page 180: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    Troubleshooting for RA Indoor Unit SiUS121827E 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 181 SiUS121827E Troubleshooting for RA Indoor Unit 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 182 Troubleshooting for RA Indoor Unit SiUS121827E Reference Check No.11 Refer to P.235 Part 6 Service Diagnosis...

  • Page 183: Mismatching Of Indoor Unit And Outdoor Unit

    SiUS121827E Troubleshooting for RA Indoor Unit Mismatching of 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 184: Troubleshooting For Sa Indoor Unit

    Troubleshooting for SA Indoor Unit SiUS121827E 6. Troubleshooting for SA Indoor Unit 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 185: Drain Level Control System Abnormality

    SiUS121827E Troubleshooting for SA Indoor Unit 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 186: Indoor Fan Motor Or Related Abnormality

    Troubleshooting for SA Indoor Unit SiUS121827E Indoor Fan Motor or Related Abnormality 6.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable FDMQ09/12/15/18/24RVJU Models Error Code Method of Error  Detection from the current flow on the fan PCB Detection ...
  • Page 187 SiUS121827E Troubleshooting for SA Indoor Unit 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 188 Troubleshooting for SA Indoor Unit SiUS121827E 6.3.2 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable FFQ09/12/15/18Q2VJU Models Error Code Method of Error The rotation speed detected by the Hall IC during indoor fan motor operation determines abnormal Detection fan motor operation. Error Decision The fan motor is not revved up.
  • Page 189 SiUS121827E Troubleshooting for SA Indoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within Correct the power ±10% from the rated supply.
  • Page 190 Troubleshooting for SA Indoor Unit SiUS121827E Reference Check No.02 Refer to P. 233 Part 6 Service Diagnosis...

  • Page 191: Indoor Fan Pcb Abnormality

    SiUS121827E Troubleshooting for SA Indoor Unit Indoor Fan PCB Abnormality Applicable FDMQ09/12/15/18/24RVJU Models Error Code Method of Error Microcomputer checks the voltage state of the fan PCB. Detection Error Decision Overvoltage or voltage drop is detected on the fan PCB. Conditions Supposed ...

  • Page 192: Humidifier Or Related Abnormality

    Troubleshooting for SA Indoor Unit SiUS121827E 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 193: Thermistor Or Related Abnormality

    SiUS121827E Troubleshooting for SA Indoor Unit 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 194: Presence Sensor Or Floor Sensor Abnormality

    Troubleshooting for SA Indoor Unit SiUS121827E Presence Sensor or Floor Sensor Abnormality Applicable FFQ09/12/15/18Q2VJU Models Error Code Method of Error The system detects abnormality by the output signal from the sensor(s). Detection Error Decision The sensor is disconnected or shorted while the unit is running. Conditions Supposed ...

  • Page 195: Remote Controller Thermistor Abnormality

    SiUS121827E Troubleshooting for SA Indoor Unit 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 196: Signal Transmission Error (Between Indoor And Outdoor Unit)

    Troubleshooting for SA Indoor Unit SiUS121827E 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 197 SiUS121827E Troubleshooting for SA Indoor Unit 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 198: Signal Transmission Error (Between Indoor Unit And Remote Controller)

    Troubleshooting for SA Indoor Unit SiUS121827E 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 199: Signal Transmission Error (Between Main/Sub Remote Controllers)

    SiUS121827E Troubleshooting for SA Indoor Unit 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 200: Mismatching Of Indoor Unit And Outdoor Unit

    Troubleshooting for SA Indoor Unit SiUS121827E 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 201: Troubleshooting For Outdoor Unit

    SiUS121827E Troubleshooting for Outdoor Unit 7. Troubleshooting for Outdoor Unit Refrigerant Shortage Error Code Outdoor Unit LED A j 1 h 2 h 3 i 4 i 5 h Display Method of Error Refrigerant shortage is detected by checking the input current value and the compressor running Detection frequency.
  • Page 202 Troubleshooting for Outdoor Unit SiUS121827E 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 Change the installation Check the installation location or direction. condition.
  • Page 203 SiUS121827E Troubleshooting for Outdoor Unit Continued from the previous page Check No. 12 Electronic expansion valve Replace the electronic functioning? expansion valve. Change for a specified amount of fresh refrigerant. Refrigerant shortage error again? Check No. 01 Replace the defective Check the thermistors.

  • Page 204: Low-Voltage Detection Or Over-Voltage Detection

    Troubleshooting for Outdoor Unit SiUS121827E Low-voltage Detection or Over-voltage Detection Error Code Outdoor Unit LED A j 1 i 2 h 3 h 4 i 5 h Display Method of Error  Indoor Unit Detection The zero-cross detection of the power supply is evaluated by the indoor unit PCB. ...
  • Page 205 SiUS121827E 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 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 206: Wiring Error Check Unexecuted

    Troubleshooting for Outdoor Unit SiUS121827E Wiring Error Check Unexecuted Error Code Outdoor Unit LED A j 1 h 2 i 3 h 4 h 5 h Display Method of Error The system checks if wiring error check is executed after clearing the memory. Detection Error Decision An error is determined when the unit is operated by the remote controller without executing wiring...

  • Page 207: Unspecified Voltage (Between Indoor Unit And Outdoor Unit), Anti-Icing Control In Other Rooms

    SiUS121827E Troubleshooting for Outdoor Unit Unspecified Voltage (Between Indoor Unit and Outdoor Unit), Anti-icing Control in Other Rooms UA, UH Error Code Outdoor Unit LED A j 1 h 2 h 3 h 4 h 5 h Display Method of Error A wrong connection is detected by checking the combination of indoor and outdoor units on the Detection microcomputer.

  • Page 208: Anti-Icing Control For Indoor Unit

    Troubleshooting for Outdoor Unit SiUS121827E Anti-icing Control for Indoor Unit Error Code Outdoor Unit LED A j 1 i 2 h 3 i 4 i 5 h Display Method of Error During cooling operation, indoor unit icing is detected by checking the temperatures sensed by the Detection indoor heat exchanger thermistor and room temperature thermistor that are located in a shut-down room.
  • Page 209 SiUS121827E 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 wiring and piping. Wrong wiring or Activate the wiring error check piping? function. Check No.

  • Page 210: Outdoor Unit Pcb Abnormality

    Troubleshooting for Outdoor Unit SiUS121827E Outdoor Unit PCB Abnormality Error Code Outdoor Unit LED A j 1 i 2 i 3 i 4 h 5 h Display Method of Error Detect within the program of the microcomputer. Detection Error Decision The program of the microcomputer is in abnormal running order.

  • Page 211: Ol Activation (Compressor Overload)

    SiUS121827E Troubleshooting for Outdoor Unit OL Activation (Compressor Overload) Error Code Outdoor Unit LED A j 1 i 2 h 3 i 4 h 5 h Display Method of Error A compressor overload is detected through compressor OL. Detection Error Decision ...
  • Page 212 Troubleshooting for Outdoor Unit SiUS121827E 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 213 SiUS121827E Troubleshooting for Outdoor Unit Reference Check No.13 Refer to P.237 Reference Check No.14 Refer to P.237 Part 6 Service Diagnosis...

  • Page 214: Compressor Lock

    Troubleshooting for Outdoor Unit SiUS121827E Compressor Lock Error Code Outdoor Unit LED A j 1 h 2 i 3 i 4 h 5 h Display Method of Error A compressor lock is detected by checking the compressor running condition through the position Detection detection circuit.
  • Page 215 SiUS121827E Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. (Precaution before turning on the power again) Make sure the power has been off for at least 30 seconds. Stop valve Open the stop valve.

  • Page 216: Dc Fan Lock

    Troubleshooting for Outdoor Unit SiUS121827E DC Fan Lock Error Code Outdoor Unit LED A j 1 i 2 i 3 i 4 i 5 h Display Method of Error An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Detection Error Decision ...
  • Page 217 SiUS121827E Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Fan motor connector disconnected? Turn off the power and reconnect the connector. Foreign matters Remove the foreign in or around the fan? matters.

  • Page 218: Input Overcurrent Detection

    Troubleshooting for Outdoor Unit SiUS121827E 7.10 Input Overcurrent Detection Error Code Outdoor Unit LED A j 1 h 2 i 3 h 4 i 5 h Display Method of Error Detected by checking the input current value Detection Error Decision ...
  • Page 219 SiUS121827E Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. ∗ An input overcurrent may result from wrong internal wiring. If the system is interrupted by an input overcurrent after the wires have been disconnected and reconnected for part replacement, check the Check No.

  • Page 220: Four Way Valve Abnormality

    Troubleshooting for Outdoor Unit SiUS121827E 7.11 Four Way Valve Abnormality Error Code Outdoor Unit LED A j 1 i 2 h 3 h 4 h 5 h Display Method of Error The liquid pipe thermistor and the outdoor heat exchanger thermistor are checked to see if they Detection function within their normal ranges in the operating mode.
  • Page 221 SiUS121827E 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 222: Discharge Pipe Temperature Control

    Troubleshooting for Outdoor Unit SiUS121827E 7.12 Discharge Pipe Temperature Control Error Code Outdoor Unit LED A j 1 i 2 h 3 i 4 h 5 h Display Method of Error An error is determined with the temperature detected by the discharge pipe thermistor. Detection Error Decision ...

  • Page 223: High Pressure Control In Cooling

    SiUS121827E Troubleshooting for Outdoor Unit 7.13 High Pressure Control in Cooling Error Code Outdoor Unit LED A j 1 i 2 h 3 i 4 i 5 h Display 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.
  • Page 224 Troubleshooting for Outdoor Unit SiUS121827E 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 225: Compressor Sensor System Abnormality

    SiUS121827E Troubleshooting for Outdoor Unit 7.14 Compressor Sensor System Abnormality Error Code Outdoor Unit LED A j 1 i 2 i 3 h 4 h 5 h Display Method of Error  The system checks the power supply voltage and the DC voltage before the compressor starts. Detection ...
  • Page 226 Troubleshooting for Outdoor Unit SiUS121827E 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 connection of the reactor. Connection OK? Connect the reactor properly. Check the connection of the compressor.

  • Page 227: Position Sensor Abnormality

    SiUS121827E Troubleshooting for Outdoor Unit 7.15 Position Sensor Abnormality Error Code Outdoor Unit LED A j 1 i 2 i 3 h 4 h 5 h Display Method of Error A compressor start-up failure is detected by checking the compressor running condition through the Detection position detection circuit.
  • Page 228 Troubleshooting for Outdoor Unit SiUS121827E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn on the power. Check the electrolytic capacitor voltage. + 100 Within 320 VDC? Replace the outdoor unit - 50 PCB (main PCB).
  • Page 229 SiUS121827E Troubleshooting for Outdoor Unit Reference Check No.15 Refer to P.238 Reference Check No.18 Refer to P.241 Reference Check No.20 Refer to P.242 Part 6 Service Diagnosis...

  • Page 230: Thermistor Or Related Abnormality (Outdoor Unit)

    Troubleshooting for Outdoor Unit SiUS121827E 7.16 Thermistor or Related Abnormality (Outdoor Unit) H9, J3, J6, J8, J9, P4 Error Code Outdoor Unit LED A j 1 i 2 i 3 h 4 h 5 h Display 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.
  • Page 231 SiUS121827E Troubleshooting for Outdoor Unit Troubleshooting In case of H9, J3, J6, J8, J9 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn on the power again. Error displayed again on remote controller? Reconnect the connectors or thermistors.

  • Page 232: Electrical Box Temperature Rise

    Troubleshooting for Outdoor Unit SiUS121827E 7.17 Electrical Box Temperature Rise Error Code Outdoor Unit LED A j 1 i 2 i 3 h 4 i 5 h Display Method of Error An electrical box temperature rise is detected by checking the radiation fin thermistor with the Detection compressor off.

  • Page 233: Radiation Fin Temperature Rise

    SiUS121827E Troubleshooting for Outdoor Unit 7.18 Radiation Fin Temperature Rise Error Code Outdoor Unit LED A j 1 h 2 h 3 h 4 i 5 h Display Method of Error A radiation fin temperature rise is detected by checking the radiation fin temperature with the Detection compressor on.
  • Page 234 Troubleshooting for Outdoor Unit SiUS121827E 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 235: Output Overcurrent Detection

    SiUS121827E Troubleshooting for Outdoor Unit 7.19 Output Overcurrent Detection Error Code Outdoor Unit LED A j 1 h 2 h 3 i 4 h 5 h Display Method of Error An output overcurrent is detected by checking the current that flows in the inverter DC section. Detection Error Decision ...
  • Page 236 Troubleshooting for Outdoor Unit SiUS121827E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. ∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again.
  • Page 237 SiUS121827E Troubleshooting for Outdoor Unit Reference Check No.17 Refer to P.240 Reference Check No.18 Refer to P.241 Reference Check No.22 Refer to P.245 Part 6 Service Diagnosis...

  • Page 238: Check

    Check SiUS121827E 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 239: Indoor Fan Motor Connector Check

    SiUS121827E Check Indoor Fan Motor Connector Check Check No.02 FTXR, CTXG, CTXS, FTXS, 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.

  • Page 240: Hall Ic Check

    Check SiUS121827E FFQ Series 1. Check the connection of connector. 2. Check motor power supply voltage output (pins 5 - 8). 3. Check motor control voltage (pins 5 - 4). 4. Check rotation command voltage output (pins 5 - 3). X20A Motor power supply voltage (290 ~ 330 VDC) Unused...

  • Page 241: Power Supply Waveform Check

    SiUS121827E 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 242: Electronic Expansion Valve Check

    Check SiUS121827E Electronic Expansion Valve Check Check No.12 Conduct the followings to check the electronic expansion valve (EV). 1. Check if the EV connector is correctly inserted in the PCB. Match the EV unit number and the connector number. 2. Turn the power off and on again, and check if all the EVs generate latching sound. 3.

  • Page 243: Four Way Valve Performance Check

    SiUS121827E Check 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 244: Inverter Analyzer Check

    Check SiUS121827E 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 245 SiUS121827E Check 1. If all the LEDs are lit uniformly, the compressor is defective. → Replace the compressor. 2. If the LEDs are not lit uniformly, check the power module. → Refer to Check No.22. 3. If NG in Check No.22, replace the power module. (Replace the main PCB.

  • Page 246: Rotation Pulse Check On The Outdoor Unit Pcb

    Check SiUS121827E Rotation Pulse Check on the Outdoor Unit PCB Check No.16 Manually rotate the outdoor fan motor and check if 4 pulses of sinusoidal voltage are detected between pins 1-2 and then pins 2-3. U (red) V (white) W (black) R6000524 8.10 Installation Condition Check Check No.17...

  • Page 247: Discharge Pressure Check

    SiUS121827E Check 8.11 Discharge Pressure Check Check No.18 Discharge pressure check High? Replace the compressor. Is the stop valve Open the stop valve. open? Is the connection pipe deformed? Replace the pipe installed at the site. Is the air filter or indoor/outdoor heat Replace the compressor.

  • Page 248: Main Circuit Short Check

    Check SiUS121827E 8.13 Main Circuit Short Check Check No.20 Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is about 0 V before checking  Measure the resistance between the pins of the DB1 referring to the table below. ...
  • Page 249 SiUS121827E Check „ Front side „ Rear side Multimeter R6000583 Part 6 Service Diagnosis...

  • Page 250: Capacitor Voltage Check

    Check SiUS121827E 8.14 Capacitor Voltage Check Check No.21 Before this check, be sure to check the main circuit for short circuit. With the circuit breaker still on, measure the voltage according to the drawing of the model in question. Be careful never to touch any live parts. Multimeter (DC, voltage) R6000525...

  • Page 251: Power Module Check

    SiUS121827E Check 8.15 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 252: Part 7 Trial Operation And Field Settings

    SiUS121827E Part 7 Trial Operation and Field Settings 1. Pump Down Operation................247 2. Forced Cooling Operation ...............248 3. Wiring Error Check Function ..............249 4. Trial Operation ..................251 4.1 RA Indoor Unit..................251 4.2 SA Indoor Unit ..................253 5. Field Settings ..................256 5.1 RA Indoor Unit..................

  • Page 253: Pump Down Operation

    SiUS121827E 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 254: Forced Cooling Operation

    Forced Cooling Operation SiUS121827E 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 255: Wiring Error Check Function

    SiUS121827E Wiring Error Check Function 3. Wiring Error Check Function Outline Wiring error check function is designed for the microcomputer to correct wiring errors itself. If local wiring is unclear in the case of buried piping, for example, just press the wiring error check switch on the outdoor unit.
  • Page 256 Wiring Error Check Function SiUS121827E Details  Wiring error check is realized by feeding refrigerant one by one through each piping port and detecting indoor heat exchanger temperature with the indoor heat exchanger thermistor in each room to see if the temperature changes in correct order. ...

  • Page 257: Trial Operation

    SiUS121827E Trial Operation 4. Trial Operation RA Indoor Unit 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 258 Trial Operation SiUS121827E 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 259: Sa Indoor Unit

    SiUS121827E Trial Operation SA Indoor Unit Outline  Make sure to install the decoration panel before carrying out trial operation if the wireless remote controller is used (FFQ series only).  Trial operation should be carried out in either cooling or heating operation. 1.
  • Page 260 Trial Operation SiUS121827E With BRC1E73 Wired Remote Controller 1. Set to COOL or HEAT operation using the Basic screen remote controller. Cool Set to 2. Press and hold Cancel button for 4 seconds Press and hold Cancel or longer. Service settings menu is button for 4 seconds or displayed.
  • Page 261 SiUS121827E Trial Operation With BRC082A43, BRC082A41W, BRC082A42W(S) Wireless Remote Controller 1. Press button and select the COOL or HEAT operation. 2. Press button twice. “TEST” is displayed. 3. Press button within 10 seconds, and the test operation starts. Monitor the operation of the indoor unit for a minimum of 10 minutes. During test operation, the indoor unit will continue to cool/heat regardless of the temperature setpoint and room temperature.

  • Page 262: Field Settings

    Field Settings SiUS121827E 5. Field Settings RA Indoor Unit 5.1.1 Model Type Settings ARC452A21, ARC452A23  The remote controller is common to the heat pump model and cooling only model.  Make sure the DIP switch is set to the left side. The heating operation will not be available when the DIP switch is set to the right side.
  • Page 263 SiUS121827E Field Settings 5.1.2 Temperature Display Switch You can select Fahrenheit or Celsius for temperature display. ARC452A21, ARC452A23  Press TEMPand TEMPbuttons at the same time for 5 seconds to change the unit of temperature display. (R14477) ARC466A21, ARC466A36  Press the upper side of Temp button and On button at the same time for 5 seconds to change the unit of temperature display.
  • Page 264 Field Settings SiUS121827E 5.1.3 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. Both the indoor unit PCB and the wireless remote controller need alteration.
  • Page 265 SiUS121827E Field Settings FDXS, CDXS  Cut the jumper JA on PCB. Series ADDRESS : JA EXIST (R22010) 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. FVXS Series 1.
  • Page 266 Field Settings SiUS121827E 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. Wireless Remote 1. Remove the cover and take it off. Controller 2.
  • Page 267 SiUS121827E Field Settings 5.1.4 Jumper and Switch Settings FTXR series Jumper When connected on indoor Function When cut (factory setting) unit PCB Fan speed setting when The fan stops. Fan speed setting; compressor stops for Remote controller setting thermostat OFF. (effective only at cooling operation) Power failure recovery...

  • Page 268: Sa Indoor Unit

    Field Settings SiUS121827E SA Indoor Unit 5.2.1 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 269 SiUS121827E Field Settings 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.and select “Indoor unit No.” to be set by using (Up/Down) button.
  • Page 270 Field Settings SiUS121827E BRC082A43, BRC082A41W, BRC082A42W(S) Wireless Remote Controller UP button Mode No. Field setting mode DOWN button First code No. RESERVE button MODE button Second code No. INSPECTION/TEST button (R24061) To set the field settings, you have to change: ...
  • Page 271 SiUS121827E Field Settings 5.2.2 Overview of Field Settings for FFQ Series First Second Code No. Mode Code Description of setting Filter cleaning Longlife filter Approx. Approx. sign interval — — — — 2,500 hrs. 1,250 hrs. (20) Remote controller thermistor Enabled Disabled...
  • Page 272 Field Settings SiUS121827E 5.2.3 Overview of Field Settings for FDMQ Series First Second Code No. Mode Code Description of setting Filter cleaning Longlife Approx. Approx. sign interval filter 2,500 1,250 — — — — (used to change hrs. hrs. filter cleaning Standard Approx.
  • Page 273 SiUS121827E Field Settings 5.2.4 MAIN/SUB Setting when Using 2 Wired Remote Controllers Outline The MAIN/SUB setting is necessary when 1 indoor unit is controlled by 2 remote controllers. When you use 2 remote controllers, set one to MAIN and the other to SUB. Details 1.
  • Page 274 Field Settings SiUS121827E 5.2.5 MAIN/SUB and Address Setting for Wireless Remote Controller for FDMQ Series Outline  If setting multiple wireless remote controllers to operate in one room, perform address setting for the receiver and the wireless remote controller.  If using both a wired remote controller and a wireless remote controller with 1 indoor unit, change the MAIN/SUB switch of the signal receiver PCB.
  • Page 275 SiUS121827E Field Settings Wireless Remote Factory set is 1. Change the wireless remote controller address setting by the following steps, if necessary. Controller 1. Hold down button and /TEST button at the same time for at least 4 seconds to enter the Address field setting mode.
  • Page 276 Field Settings SiUS121827E 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 277 SiUS121827E Field Settings 5.2.6 MAIN/SUB and Address Setting for Wireless Remote Controller for FFQ Series Outline  If setting multiple wireless remote controllers to operate in one room, perform address setting for the receiver and the wireless remote controller.  If using both a wired remote controller and a wireless remote controller with 1 indoor unit, change the MAIN/SUB switch of the transmitter board.
  • Page 278 Field Settings SiUS121827E Wireless Remote Factory set is 1. Change the wireless remote controller address setting by the following steps, if necessary. Controller 1. Hold down button and /TEST button at the same time for at least 4 seconds to enter the Address field setting mode.
  • Page 279 SiUS121827E Field Settings 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 280: Outdoor Unit

    Field Settings SiUS121827E Outdoor Unit 5.3.1 Priority Room Setting Outline The indoor unit for which priority room setting is applied takes priority in the following cases.  Operation mode priority The operation mode of the prioritized room takes precedence. For example, when the prioritized indoor unit starts cooling operation, the other indoor units which have been in heating operation enter the standby mode.
  • Page 281 SiUS121827E Field Settings 5.3.2 COOL/HEAT Mode Lock Use the S15 connector to set the unit to cooling only or heating only. Setting to heating only (H): short-circuit the pins 1 and 3 of the connector S15. Setting to cooling only (C): short-circuit the pins 3 and 5 of the connector S15. The following specifications apply to the connector housing and pins.
  • Page 282 Field Settings SiUS121827E 5.3.3 NIGHT QUIET Mode Outline If NIGHT QUIET mode is to be used, initial settings must be made when the unit is installed. Explain the function of NIGHT QUIET mode, as described below, to the customer, and confirm whether or not the customer wants to use NIGHT QUIET mode.

  • Page 283: Silicone Grease On Power Transistor/Diode Bridge

    SiUS121827E Silicone Grease on Power Transistor/Diode Bridge 6. 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 284: Part 8 Appendix

    SiUS121827E Part 8 Appendix 1. Piping Diagrams..................279 1.1 Indoor Unit....................279 1.2 Outdoor Unit ..................... 282 2. Wiring Diagrams..................283 2.1 Indoor Unit....................283 3. Outdoor Unit....................290 4. Operation Limit..................292 Part 8 Appendix...

  • Page 285: Piping Diagrams

    SiUS121827E Piping Diagrams 1. Piping Diagrams Indoor Unit FTXR09/12TVJUW(S), CTXG09/12QVJUW(S) FTXR18TVJUW(S), CTXG18QVJUW(S) Indoor unit Indoor unit Heat exchanger thermistor 1/4 CuT Heat exchanger thermistor Heat exchanger 1/4 CuT Heat exchanger Cross flow fan Field piping Cross flow fan Field piping 1/4 CuT 1/4 CuT Fan motor...
  • Page 286 Piping Diagrams SiUS121827E FTXS24LVJU FDXS09/12LVJU INDOOR UNIT INDOOR UNIT 5/16 CuT (1/4CuT) DISTRIBUTOR HEAT EXCHANGER HEAT EXCHANGER THERMISTOR ON HEAT EXCH. THERMISTOR CROSS FLOW FAN FIELD PIPING ON HEAT EXCH. FIELD PIPING (1/4CuT) SIROCCO FAN 1/4 CuT FAN MOTOR FAN MOTOR HEADER FIELD PIPING (3/8CuT)
  • Page 287 SiUS121827E Piping Diagrams FVXS09/12NVJU FVXS15/18NVJU 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. 1/4 CuT 1/4 CuT 1/4 CuT FIELD PIPING TURBO FAN...

  • Page 288: Outdoor Unit

    Piping Diagrams SiUS121827E Outdoor Unit 5MXS48TVJU 3D117817 4MXL36TVJU 3D118311 Part 8 Appendix...

  • Page 289: Wiring Diagrams

    SiUS121827E Wiring Diagrams 2. Wiring Diagrams Indoor Unit FTXR09/12/18TVJUW(S), CTXG09/12/18QVJUW(S) Wiring diagram : Frame ground : Signal receiver F1U, F2U : Fuse : Ground OUTDOOR H1P, H2P : Pilot lamp H1-H3 : Harness GRN/YLW R1T, R2T : Thermistor MR10 : Magnetic relay GRN/YLW S25-S200 : Connector...
  • Page 290 Wiring Diagrams SiUS121827E CTXS07LVJU, FTXS09/12LVJU PCB3 PCB1 LED1 OUTDOOR 3.15A C102 LED2 MR10 FIELD WIRING. LED3 C101 GRN/YLW TRANSMISSION CIRCUIT CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN. t°...
  • Page 291 SiUS121827E Wiring Diagrams FTXS15/18/24LVJU WIRING DIAGRAM PCB3 PCB1 LED1 OUTDOOR 3.15A C102 LED2 MR10 FIELD WIRING. LED3 C101 TRANSMISSION CAUTION CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN. t°...
  • Page 292 Wiring Diagrams SiUS121827E FDXS09/12LVJU, CDXS15/18/24LVJU V1TR 3.15A OUTDOOR LED LED GRN/YLW FIELD WIRING. TERMINAL FOR CAUTION TRANSMISSION CENTRALIZED CONTROL CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK SIGNAL ON AGAIN. RECEIVER RTH1 H1P~H3P...
  • Page 293 SiUS121827E Wiring Diagrams FVXS09/12/15/18NVJU PCB3 PCB2 ® RECTIFIER S2W ( 4 ) 3.15A OUTDOOR GRN/YLW MR10 FIELD WIRING. 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 294 Wiring Diagrams SiUS121827E FDMQ09/12/15/18/24RVJU 3D112629A Note A1P: Control PCB A2P: Indoor fan PCB Refer to page 47 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
  • Page 295 SiUS121827E Wiring Diagrams FFQ09/12/15/18Q2VJU INDOOR UNIT PILOT LAMP (ON-RED) PRINTED CIRCUIT BOARD PILOT LAMP WIRING DIAGRAM WIRELESS REMOTE CONTROLLER C105 (TIMER-GREEN) CAPACITOR (M1F) (RECEIVER/DISPLAY UNIT) DIP SWITCH ON PCB PILOT LAMP (OPTIONAL ACCESSORY) FUSE (F, 5A, 250V) (FILTER SIGN-RED) FLASHING LAMP PILOT LAMP (SERVICE MONITOR GREEN) (DEFROST-ORANGE)

  • Page 296: Outdoor Unit

    Outdoor Unit SiUS121827E 3. Outdoor Unit 5MXS48TVJU 3D118022 Note(s) PCB1: Main PCB PCB2: Service monitor PCB Refer to page 54 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...
  • Page 297 SiUS121827E Outdoor Unit 4MXL36TVJU 3D118060 Note(s) PCB1: Main PCB PCB2: Service monitor PCB Refer to page 54 for Printed Circuit Board Connector Wiring Diagram. Part 8 Appendix...

  • Page 298: Operation Limit

    Operation Limit SiUS121827E 4. Operation Limit 5MXS48TVJU 3D048149D 4MXL36TVJU 3D101428 Part 8 Appendix...
  • Page 299 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion.  Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

This manual is also suitable for:

5mxs-t seriesFtxr12tvjusFtxr09tvjuwFtxr09tvjusFtxr18tvjuwFtxr18tvjus ... Show all

Table of Contents