Daikin 4MXS-R Series Service Manual
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Daikin 4MXS-R Series Service Manual

Multi-split type air conditioners
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SiUS121736EA
Service
Manual
Multi-Split Type Air Conditioners
2MXS-N, 3/4MXS-R Series
[Applied Models]
Inverter Multi : Heat Pump
Table of Contents
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Summary of Contents for Daikin 4MXS-R Series

  • Page 1 SiUS121736EA Service Manual Multi-Split Type Air Conditioners 2MXS-N, 3/4MXS-R Series [Applied Models] Inverter Multi : Heat Pump...
  • Page 2 SiUS121736EA Multi-Split Type Air Conditioners 2MXS-N, 3/4MXS-R Series Heat Pump Indoor Unit CTXG09QVJUW CDXS07LVJU FDMQ09RVJU CTXG09QVJUS FDXS09LVJU FDMQ12RVJU CTXG12QVJUW FDXS12LVJU FDMQ15RVJU CTXG12QVJUS CDXS15LVJU FDMQ18RVJU CTXG18QVJUW CDXS18LVJU FDMQ24RVJU CTXG18QVJUS CDXS24LVJU FTXR09TVJUW FVXS09NVJU FFQ09Q2VJU FTXR09TVJUS FVXS12NVJU FFQ12Q2VJU FTXR12TVJUW FVXS15NVJU FFQ15Q2VJU FTXR12TVJUS FVXS18NVJU...

  • Page 3: Table Of Contents

    SiUS121736EA 1. Safety Cautions..................vii 1.1 Warnings and Cautions Regarding Safety of Workers........ vii 1.2 Warnings and Cautions Regarding Safety of Users........ix 2. Icons Used ....................xii Part 1 List of Functions ..............1 1. RA Indoor Unit..................... 2 2. SA Indoor Unit..................... 7 3.
  • Page 4 SiUS121736EA 2.6 NIGHT SET Mode ..................58 2.7 ECONO Operation ..................59 2.8 2-Area INTELLIGENT EYE Operation ............60 2.9 INTELLIGENT EYE Operation ..............62 2.10 POWERFUL Operation ................63 2.11 Multi-Monitor Lamp/TIMER Lamp .............. 64 2.12 Clock Setting ....................65 2.13 WEEKLY TIMER Operation ...............
  • Page 5 SiUS121736EA Part 6 Service Diagnosis.............. 131 1. General Problem Symptoms and Check Items ........133 2. Troubleshooting with LED ...............134 2.1 Indoor Unit....................134 2.2 Outdoor Unit ..................... 136 3. Service Diagnosis ................... 137 3.1 RA Indoor Unit..................137 3.2 SA Indoor Unit ..................143 4.
  • Page 6 SiUS121736EA 7.11 Four Way Valve Abnormality..............193 7.12 Discharge Pipe Temperature Control............195 7.13 High Pressure Control in Cooling ............. 196 7.14 Compressor Sensor System Abnormality ..........197 7.15 Position Sensor Abnormality ..............199 7.16 CT or Related Abnormality ............... 201 7.17 Thermistor or Related Abnormality (Outdoor Unit)........
  • Page 7 SiUS121736EA 3. Operation Limit..................267 Table of Contents...

  • Page 8: Safety Cautions

    Safety Cautions SiUS121736EA 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 SiUS121736EA 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 SiUS121736EA 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 a welder in an enclosed room may cause oxygen deficiency.
  • Page 11 SiUS121736EA Safety Cautions Warning Do not damage or modify the power cable. Damaged or modified power cables may cause an electrical shock or fire. Placing heavy items on the power cable, or heating or pulling the power cable may damage it. Do not mix air or gas other than the specified refrigerant (R-32 / R-410A / R- 22) in the refrigerant system.
  • Page 12 Safety Cautions SiUS121736EA Caution If the installation platform or frame has corroded, replace it. A corroded installation platform or frame may cause the unit to fall, resulting in injury. Check the earth / grounding, and repair it if the equipment is not properly earthed / grounded.

  • Page 13: Icons Used

    SiUS121736EA 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 A Warning is used when there is danger of personal injury. Warning Caution A Caution is used when there is danger that the reader, through incorrect manipulation, may damage equipment, lose data, get an Caution...

  • Page 14: Part 1 List Of Functions

    SiUS121736EA Part 1 List of Functions 1. RA Indoor Unit..................... 2 2. SA Indoor Unit..................... 7 3. Outdoor Unit....................9 List of Functions...

  • Page 15: Ra Indoor Unit

    SiUS121736EA RA Indoor Unit 1. RA Indoor Unit Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — Functions Cleanliness Operation limit for cooling — Titanium apatite deodorizing filter (option) Operation limit for heating — Longlife filter (option) —...
  • Page 16 RA Indoor Unit SiUS121736EA Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — Functions Cleanliness Operation limit for cooling — Titanium apatite deodorizing filter Operation limit for heating — Longlife filter (option) — PAM control —...
  • Page 17 SiUS121736EA RA Indoor Unit Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — Functions Cleanliness Operation limit for cooling — Titanium apatite deodorizing filter Operation limit for heating — Longlife filter (option) — PAM control —...
  • Page 18 RA Indoor Unit SiUS121736EA Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — — Functions Cleanliness Operation limit for cooling — — Titanium apatite deodorizing filter — — Operation limit for heating — — Longlife filter (option) —...
  • Page 19 SiUS121736EA RA Indoor Unit Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — Functions Cleanliness Operation limit for cooling — Titanium apatite deodorizing filter Operation limit for heating — Longlife filter (option) — PAM control —...

  • Page 20: Sa Indoor Unit

    SA Indoor Unit SiUS121736EA 2. SA Indoor Unit Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — — Functions Cleanliness Operation limit for cooling — — Titanium apatite deodorizing filter — — Operation limit for heating —...
  • Page 21 SiUS121736EA SA Indoor Unit Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — — Functions Cleanliness Operation limit for cooling — — Titanium apatite deodorizing filter — — Operation limit for heating — — Longlife filter (option) PAM control —...

  • Page 22: Outdoor Unit

    Outdoor Unit SiUS121736EA 3. Outdoor Unit Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — — Functions Cleanliness Operation limit for cooling Titanium apatite deodorizing filter — — Refer to P. 267 Operation limit for heating Longlife filter (option) —...

  • Page 23: Part 2 Specifications

    SiUS121736EA Part 2 Specifications 1. RA Indoor Unit...................11 2. SA Indoor Unit...................19 3. Outdoor Unit....................22 Specifications...

  • Page 24: Ra Indoor Unit

    RA Indoor Unit SiUS121736EA 1. RA Indoor Unit 60 Hz, 208 - 230 V CTXG09QVJUW CTXG09QVJUS Model Cooling Heating Cooling Heating Rated Capacity 9 kBtu/h Class 9 kBtu/h Class Front Panel Color White Silver 279 (7.9) 367 (10.4) 279 (7.9) 367 (10.4) 212 (6.0) 265 (7.5)
  • Page 25 SiUS121736EA RA Indoor Unit 60 Hz, 208 - 230 V CTXG18QVJUW CTXG18QVJUS Model Cooling Heating Cooling Heating Rated Capacity 18 kBtu/h Class 18 kBtu/h Class Front Panel Color White Silver 364 (10.3) 438 (12.4) 364 (10.3) 438 (12.4) 286 (8.1) 350 (9.9) 286 (8.1) 350 (9.9)
  • Page 26 RA Indoor Unit SiUS121736EA 60 Hz, 208 - 230 V FTXR12TVJUW FTXR12TVJUS Model Cooling Heating Cooling Heating Rated Capacity 12 kBtu/h Class 12 kBtu/h Class Front Panel Color White Silver 335 (9.5) 395 (11.2) 335 (9.5) 395 (11.2) 219 (6.2) 290 (8.2) 219 (6.2) 290 (8.2)
  • Page 27 SiUS121736EA RA Indoor Unit 60 Hz, 208 - 230 V CTXS07LVJU Model Cooling Heating Rated Capacity 7 kBtu/h Class Front Panel Color White 332 (9.4) 350 (9.9) 261 (7.4) 290 (8.2) Airflow Rate (m³/min) 194 (5.5) 233 (6.6) 145 (4.1) 219 (6.2) Type Cross Flow Fan...
  • Page 28 RA Indoor Unit SiUS121736EA 60 Hz, 208 - 230 V FTXS15LVJU FTXS18LVJU Model Cooling Heating Cooling Heating Rated Capacity 15 kBtu/h Class 18 kBtu/h Class Front Panel Color White White 568 (16.1) 593 (16.8) 583 (16.5) 625 (17.7) 477 (13.5) 505 (14.3) 484 (13.7) 526 (14.9)
  • Page 29 SiUS121736EA RA Indoor Unit 60 Hz, 208 - 230 V CDXS07LVJU FDXS09LVJU Model Cooling Heating Cooling Heating Rated Capacity 7 kBtu/h Class 9 kBtu/h Class External Static Pressure O (Pa) 0.12 (30) 0.12 (30) 305 (8.6) 305 (8.6) 305 (8.6) 305 (8.6) 280 (7.9) 280 (7.9)
  • Page 30 RA Indoor Unit SiUS121736EA 60 Hz, 208 - 230 V CDXS18LVJU CDXS24LVJU Model Cooling Heating Cooling Heating Rated Capacity 18 kBtu/h Class 24 kBtu/h Class External Static Pressure O (Pa) 0.16 (40) 0.16 (40) 424 (12.0) 424 (12.0) 565 (16.0) 565 (16.0) 388 (11.0) 388 (11.0)
  • Page 31 SiUS121736EA RA Indoor Unit 60 Hz, 208 - 230 V FVXS09NVJU FVXS12NVJU Model Cooling Heating Cooling Heating Rated Capacity 9 kBtu/h Class 12 kBtu/h Class Front Panel Color White White 290 (8.2) 311 (8.8) 300 (8.5) 332 (9.4) 230 (6.5) 244 (6.9) 237 (6.7) 258 (7.3)

  • Page 32: Sa Indoor Unit

    SA Indoor Unit SiUS121736EA 2. SA Indoor Unit 60 Hz, 208 - 230 V FDMQ09RVJU FDMQ12RVJU Model Cooling Heating Cooling Heating Rated Capacity 9 kBtu/h Class 12 kBtu/h Class Casing Color — — Dimensions (H × W × D) in. (mm) 9-5/8 ×...
  • Page 33 SiUS121736EA SA Indoor Unit 60 Hz, 208 - 230 V FDMQ24RVJU Model Cooling Heating 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) Type Cross Fin Coil Coil...
  • Page 34 SA Indoor Unit SiUS121736EA 60 Hz, 208 - 230 V FFQ09Q2VJU FFQ12Q2VJU Model Cooling Heating Cooling Heating Rated Capacity 9 kBtu/h Class 12 kBtu/h Class Model BYFQ60B3W1 BYFQ60B3W1 Color White White Decoration Panel Dimensions in. (mm) 2-3/16 × 27-9/16 × 27-9/16 (55 × 700 × 700) 2-3/16 ×...

  • Page 35: Outdoor Unit

    SiUS121736EA Outdoor Unit 3. Outdoor Unit 60 Hz, 208 - 230 V 2MXS18NMVJU 2MXS18NMVJUA Model Cooling Heating Cooling Heating — — Btu/W·h 12.5 — 12.5 — SEER / HSPF 14.0 18.9 10.7 14.0 18.9 10.7 Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type...
  • Page 36 Outdoor Unit SiUS121736EA 60 Hz, 208 - 230 V 3MXS24RMVJU 3MXS24RMVJUA Model Cooling Heating Cooling Heating — — Btu/W·h 12.7 — 12.7 — SEER / HSPF 14.0 18.0 12.5 14.0 18.0 12.5 Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model...
  • Page 37 SiUS121736EA Outdoor Unit 60 Hz, 208 - 230 V 4MXS36RMVJU 4MXS36RMVJUA Model Cooling Heating Cooling Heating — — Btu/W·h — — SEER / HSPF 14.0 17.7 12.2 14.0 17.7 12.2 Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model...

  • Page 38: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiUS121736EA Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................26 1.1 CTXG09/12/18QVJUW(S), FTXR09/12/18TVJUW(S) ....... 26 1.2 CTXS07LVJU, FTXS09/12LVJU ..............28 1.3 FTXS15/18/24LVJU ................... 30 1.4 CDXS07/15/18/24LVJU, FDXS09/12LVJU ..........32 1.5 FVXS09/12/15/18NVJU................34 1.6 FDMQ09/12/15/18/24RVJU ............... 36 1.7 FFQ09/12/15/18Q2VJU................38 2.

  • Page 39: Indoor Unit

    SiUS121736EA Indoor Unit 1. Indoor Unit CTXG09/12/18QVJUW(S), FTXR09/12/18TVJUW(S) Control PCB (A1P) 1) S21 Connector for centralized control (HA) 2) S25 Connector for INTELLIGENT EYE sensor PCB (A3P) 3) S32 Indoor heat exchanger thermistor 4) S41 Connector for swing motors 5) S42 Connector for reduction motor (front panel mechanism) and limit switch 6) S46 Connector for display/signal receiver PCB (A2P)
  • Page 40 Indoor Unit SiUS121736EA Display/Signal Receiver PCB 1) S51 Connector for control PCB (A1P) (A2P) 2) S52 Connector for room temperature thermistor 3) S1W Indoor unit ON/OFF button 4) H1P LED for operation (multi-color) 5) H2P LED for INTELLIGENT EYE (green) 6) JA Address setting jumper ∗...

  • Page 41: Ctxs07Lvju, Ftxs09/12Lvju

    SiUS121736EA Indoor Unit CTXS07LVJU, FTXS09/12LVJU Control PCB (PCB1) 1) S1 Connector for DC fan motor 2) S21 Connector for centralized control (HA) 3) S25 Connector for INTELLIGENT EYE sensor PCB (PCB4) 4) S32 Indoor heat exchanger thermistor 5) S41 Connector for swing motors 6) S46 Connector for display PCB (PCB3) 7) S47...
  • Page 42 Indoor Unit SiUS121736EA Signal Receiver PCB (PCB2) 1) S48 Connector for control PCB (PCB1) 3P210728-1 Display PCB (PCB3) 1) S49 Connector for control PCB (PCB1) 2) SW1 Indoor unit ON/OFF button 3) LED1 (H1P) LED for operation (green) 4) LED2 (H2P) LED for timer (yellow) 5) LED3 (H3P) LED for INTELLIGENT EYE (green)

  • Page 43: Ftxs15/18/24Lvju

    SiUS121736EA Indoor Unit FTXS15/18/24LVJU Control PCB (PCB1) 1) S1 Connector for DC fan motor 2) S21 Connector for centralized control (HA) 3) S25 Connector for INTELLIGENT EYE sensor PCB (PCB4) 4) S32 Indoor heat exchanger thermistor 5) S41 Connector for swing motors 6) S46 Connector for display PCB (PCB3) 7) S47...
  • Page 44 Indoor Unit SiUS121736EA Signal Receiver PCB (PCB2) 1) S48 Connector for control PCB (PCB1) 3P224121-1 Display PCB (PCB3) 1) S49 Connector for control PCB (PCB1) 2) SW1 Indoor unit ON/OFF button 3) LED1 (H1P) LED for operation (green) 4) LED2 (H2P) LED for timer (yellow) 5) LED3 (H3P) LED for INTELLIGENT EYE (green)

  • Page 45: Cdxs07/15/18/24Lvju, Fdxs09/12Lvju

    SiUS121736EA Indoor Unit CDXS07/15/18/24LVJU, FDXS09/12LVJU Control PCB (A1P) 1) S1 Connector for AC fan motor 2) S7 Connector for AC fan motor (Hall IC) 3) S21 Connector for centralized control (HA) 4) S26 Connector for display/signal receiver PCB (A2P) 5) S32 Connector for indoor heat exchanger thermistor 6) H1, H2, H3 Connector for terminal block...
  • Page 46 Indoor Unit SiUS121736EA Display/Signal Receiver PCB 1) S1 Connector for control PCB (A1P) (A2P) 2) SW1 (S1W) Indoor unit ON/OFF button 3) LED2 (H2P) LED for timer (yellow) 4) LED3 (H3P) LED for operation (green) 5) RTH1 (R1T) Room temperature thermistor LED3 LED2 RTH1...

  • Page 47: Fvxs09/12/15/18Nvju

    SiUS121736EA Indoor Unit FVXS09/12/15/18NVJU Control PCB (PCB2) 1) S1 Connector for DC fan motor 2) S21 Connector for centralized control (HA) 3) S26 Connector for service PCB (PCB3) 4) S32 Indoor heat exchanger thermistor 5) S41 Connector for lower air outlet motor 6) S42 Connector for swing motor 7) S46...
  • Page 48 Indoor Unit SiUS121736EA Sensor PCB (PCB1) 1) S49 Connector for control PCB (PCB2) 2) RTH2 (R1T) Room temperature thermistor RTH2 3P191450-1 Service PCB (PCB3) 1) S27 Connector for control PCB (PCB2) 2) SW2 (S2W)-4 Switch for upward airflow limit setting ∗...

  • Page 49: Fdmq09/12/15/18/24Rvju

    SiUS121736EA 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 50 Indoor Unit SiUS121736EA 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 51: Ffq09/12/15/18Q2Vju

    SiUS121736EA Indoor Unit FFQ09/12/15/18Q2VJU Control PCB (A1P) 1) X15A Connector for float switch 2) X16A Connector for room temperature thermistor (suction air thermistor) 3) X17A, X18A Connector for indoor heat exchanger thermistor 4) X20A Connector for DC fan motor 5) X24A Connector for transmitter board (when the wireless remote controller (option) is used) 6) X25A...

  • Page 52: Sensor Kit For Ffq Series

    Sensor Kit for FFQ Series SiUS121736EA 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 Printed Circuit Board Connector Wiring Diagram...

  • Page 53: Wired Remote Controller

    SiUS121736EA Wired Remote Controller 3. Wired Remote Controller BRC1E73 Wired Remote Controller PCB 1) P1, P2 Terminal for indoor unit 2) R4T Room temperature thermistor 2P298037-7 Printed Circuit Board Connector Wiring Diagram...

  • Page 54: Wireless Remote Controller Receiver For Fdmq Series

    Wireless Remote Controller Receiver for FDMQ series SiUS121736EA 4. Wireless Remote Controller Receiver for FDMQ series BRC082A43 Wireless Remote MAIN/SUB setting switch Controller PCB ∗ Refer to page 243 for details. Address setting switch ∗ Refer to page 243 for details. P1, P2 Terminal for indoor unit control PCB (A1P) 3P156152-1...

  • Page 55: Wireless Remote Controller Kit For Ffq Series

    SiUS121736EA Wireless Remote Controller Kit for FFQ Series 5. Wireless Remote Controller Kit for FFQ Series BRC082A41W, BRC082A42W(S) Transmitter Board (A2P) 1) X1A Connector for receiver (A3P) 2) X2A Connector for control PCB (A1P) 3) SS1 MAIN/SUB setting switch ∗ Refer to page 246 for details. 4) SS2 Address setting switch ∗...

  • Page 56: Outdoor Unit

    Outdoor Unit SiUS121736EA 6. Outdoor Unit Main PCB (PCB1) 1) S Connector for terminal board (indoor - outdoor transmission) 2) S15 Connector for COOL/HEAT mode lock ∗ Refer to page 231 for details. 3) S20 (white) Connector for electronic expansion valve coil A port 4) S21 (red) Connector for electronic expansion valve coil B port 5) S22 (blue)
  • Page 57 SiUS121736EA Outdoor Unit E1, E2 HL1, HN1 V401 S201 U, V, W S202 2P350358-10 2P350358-11 Printed Circuit Board Connector Wiring Diagram...
  • Page 58 Outdoor Unit SiUS121736EA Service Monitor PCB (PCB2) 1) S501, S502 Connector for main PCB (PCB1) 2) LED A LED for service monitor (green) 3) LED1 - LED5 LED for service monitor (red) 4) SW1 Forced operation ON/OFF switch ∗ Refer to page 222 for details. 5) SW2 Operation mode switch ∗...

  • Page 59: Part 4 Functions And Control

    SiUS121736EA Part 4 Functions and Control 1. Common Functions ...................48 1.1 Temperature Control .................. 48 1.2 Frequency Principle..................48 2. RA Indoor Unit Functions ................50 2.1 Airflow Direction Control................50 2.2 Fan Speed Control for Indoor Unit ............. 54 2.3 Program Dry Operation ................55 2.4 Automatic Operation...................
  • Page 60 SiUS121736EA 4.12 Low Hz High Pressure Limit ..............103 4.13 Electronic Expansion Valve Control ............104 4.14 Malfunctions ..................... 109 Functions and Control...

  • Page 61: Common Functions

    SiUS121736EA 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 Target temperature: temperature determined by microcomputer Target temperature Room thermistor temperature...
  • Page 62 Common Functions SiUS121736EA Inverter Principle To regulate the capacity, a frequency control is needed. The inverter makes it possible to control the rotation speed of the compressor. The following table explains the inverter principle: Phase Description The supplied AC power source is converted into the DC power source for the present. The DC power source is reconverted into the three phase AC power source with variable frequency.

  • Page 63: Ra Indoor Unit Functions

    SiUS121736EA RA Indoor Unit Functions 2. RA Indoor Unit Functions Airflow Direction Control Applicable CTXG09/12/18QVJUW(S) Models FTXR09/12/18TVJUW(S) 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 64 RA Indoor Unit Functions SiUS121736EA CTXS, FTXS Series Flap (up and down) Louver (right and left) Cooling/Dry Heating 5˚ 07/09/12 class 15˚ 30˚ 35˚ 30˚ 30˚ 55˚ 65˚ 45˚ 65˚ 70˚ 80˚ (R11404) (R13527) (R11402) (R11403) 15˚ 15˚ 15/18/24 class 30˚...
  • Page 65 SiUS121736EA RA Indoor Unit Functions 3-D Airflow CTXG, FTXR, CTXS, FTXS Series Alternative repetition of vertical and horizontal swing motions enables uniform air-conditioning of the entire room. When the horizontal swing and vertical swing are both set to automatic operation, the airflow becomes 3-D airflow.
  • Page 66 RA Indoor Unit Functions SiUS121736EA Airflow Selection FVXS Series Airflow direction can be set with the airflow selection switch. Setting Open the front panel. Air is blown from the upper outlet only. The blow pattern is automatically decided depending on mode and conditions. (Recommended and factory set.) Front panel (R17866)

  • Page 67: Fan Speed Control For Indoor Unit

    SiUS121736EA RA Indoor Unit Functions Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature.

  • Page 68: Program Dry Operation

    RA Indoor Unit Functions SiUS121736EA 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 69: Automatic Operation

    SiUS121736EA RA Indoor Unit Functions Automatic Operation Outline Automatic Cooling/Heating Function 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 70: Thermostat Control

    RA Indoor Unit Functions SiUS121736EA CDXS, FDXS, 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 71: Night Set Mode

    SiUS121736EA RA Indoor Unit Functions CTXS, FTXS series Room thermistor temperature – target temperature Zone A 2.0˚C (3.6˚F) 2.0˚C (3.6˚F) Zone B 1.5˚C (2.7˚F) Zone C 1.0˚C (1.8˚F) 0.5˚C (0.9˚F) (R24033) CDXS, FDXS, FVXS series Room thermistor temperature – target temperature Zone A 1.5˚C (2.7˚F) Zone B...

  • Page 72: Econo Operation

    RA Indoor Unit Functions SiUS121736EA 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 73: 2-Area Intelligent Eye Operation

    SiUS121736EA RA Indoor Unit Functions 2-Area INTELLIGENT EYE Operation Applicable CTXG09/12/18QVJUW(S) Models FTXR09/12/18TVJUW(S) Outline The following functions can be performed by the microcomputer with 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 74 RA Indoor Unit Functions SiUS121736EA 2. Motions (in cooling) within within within 20 min. 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 75: Intelligent Eye Operation

    SiUS121736EA RA Indoor Unit Functions 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 76: Powerful Operation

    RA Indoor Unit Functions SiUS121736EA 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. Details When POWERFUL button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes.

  • Page 77: Multi-Monitor Lamp/Timer Lamp

    SiUS121736EA RA Indoor Unit Functions 2.11 Multi-Monitor Lamp/TIMER Lamp Applicable CTXG09/12/18QVJUW(S) Models FTXR09/12/18TVJUW(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 78: Clock Setting

    RA Indoor Unit Functions SiUS121736EA 2.12 Clock Setting ARC452 Series The clock can be set by taking the following steps: ARC466 Series 1. Press CLOCK button. → is displayed. MON and blink. 2. Press SELECT or SELECT button to set the clock to the current day of the week. 3.

  • Page 79: Weekly Timer Operation

    SiUS121736EA RA Indoor Unit Functions 2.13 WEEKLY TIMER Operation Applicable CTXG09/12/18QVJUW(S) Models FTXR09/12/18TVJUW(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 CTXG, FTXR series as representative.
  • Page 80 RA Indoor Unit Functions SiUS121736EA 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 81 SiUS121736EA RA Indoor Unit Functions 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 82 RA Indoor Unit Functions SiUS121736EA 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 83 SiUS121736EA RA Indoor Unit Functions 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 84 RA Indoor Unit Functions SiUS121736EA 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 85: Other Functions

    SiUS121736EA RA Indoor Unit Functions 2.14 Other Functions 2.14.1 Hot-Start Function In order to prevent the cold air blast that normally occurs when heating operation starts, the temperature of the indoor heat exchanger is detected, and the airflow is either stopped or significantly weakened resulting in comfortable heating.
  • Page 86 RA Indoor Unit Functions SiUS121736EA FVXS Series ON/OFF button (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 87: Sa Indoor Unit Functions

    SiUS121736EA SA Indoor Unit Functions 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) Airflow direction fixed setting You can select from one of the fixed directions.

  • Page 88: Fan Speed Control For Indoor Unit

    SA Indoor Unit Functions SiUS121736EA 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. The system may change the fan speed automatically for equipment protection purposes.

  • Page 89: Program Dry Operation

    SiUS121736EA SA 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 90: Clock And Calendar Setting (With Wired Remote Controller Brc1E73)

    SA Indoor Unit Functions SiUS121736EA 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 91 SiUS121736EA SA Indoor Unit Functions 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 92: Schedule Timer Operation (With Wired Remote Controller Brc1E73)

    SA Indoor Unit Functions SiUS121736EA 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. Startup time, cooling and heating temperature setpoints can be configured.
  • Page 93 SiUS121736EA SA Indoor Unit Functions 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 the daily patterns screen.
  • Page 94 SA Indoor Unit Functions SiUS121736EA 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 95 SiUS121736EA 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 96: Setback Function (With Wired Remote Controller Brc1E73)

    SA Indoor Unit Functions SiUS121736EA Setback Function (With Wired Remote Controller BRC1E73) Applicable FFQ09/12/15/18Q2VJU Models Outline The Setback function can be used to maintain the space temperature in an assigned range for an unoccupied period. Details The setback icon flashes on the LCD of wired remote controller when the unit is turned on by the setback control.
  • Page 97 SiUS121736EA SA Indoor Unit Functions 3.7.2 If the Float Switch is OFF with the Thermostat ON in Cooling Operation ∗2 ∗1 ∗4 ∗3 Float switch 5 sec. 5 sec. Thermostat (running) Error display Drain pump 5 min. 5 sec. 5 min. 5 sec.

  • Page 98: Hot Start Control (In Heating Operation Only)

    SA Indoor Unit Functions SiUS121736EA 3.7.4 If the Float Switch Turns OFF and ON Continuously, or the Float Switch Turns OFF While AF Displayed ∗1 ∗2 ∗3 Float Switch 5 sec. 5 sec. 5 sec. 5 sec. 5 sec. Thermostat (running) Error Display Drain Pump...

  • Page 99: Presence And Floor Sensors (Option)

    SiUS121736EA 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 100 SA Indoor Unit Functions SiUS121736EA 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 101 SiUS121736EA 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 102: Other Functions

    SA Indoor Unit Functions SiUS121736EA 3.10 Other Functions 3.10.1 Signal Receiving Sign When the indoor unit receives a signal from the remote controller, the unit emits a signal receiving sound. 3.10.2 Auto-restart Function If a power failure (even a momentary one) occurs during the operation, the system restarts automatically in the same conditions as before when the power supply is restored to the conditions prior to the power failure.

  • Page 103: Control Specification

    SiUS121736EA Control Specification 4. Control Specification Thermistor Functions Expansion valve (3) Outdoor (5) Liquid Pipe Temperature Thermistor Thermistor (2) Outdoor Heat Exchanger Thermistor Four way valve (1) Discharge Pipe Thermistor (7) Room (6) Indoor Heat Compressor Temperature Exchanger Thermistor Thermistor (4) Gas Pipe Thermistor (R23838)
  • Page 104 Control Specification SiUS121736EA (5) Liquid Pipe Liquid pipe thermistor is used to protect the compressor against liquid attack during cooling operation. Thermistor 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 105: Mode Hierarchy

    SiUS121736EA Control Specification Mode Hierarchy Outline 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 106: Frequency Control

    Control Specification SiUS121736EA Frequency Control Outline Frequency that corresponds 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 (∆F<0) by PI control, the target frequency is used as the command frequency.
  • Page 107 SiUS121736EA Control Specification Parameters Q value Indoor unit output determined from indoor unit volume, airflow rate and other factors. S value: Indoor Unit Capacity An S value is the capacity of the indoor unit, and is used for frequency command. Capacity S value Capacity...

  • Page 108: Controls At Mode Changing/Start-Up

    Control Specification SiUS121736EA 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 20°C (68°F), the inverter operation in open phase starts.

  • Page 109: Discharge Pipe Temperature Control

    SiUS121736EA Control Specification 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 (R13528) 18 class 24/36 class A (Hz) 35 ~ 55 B (Hz)

  • Page 110: Input Current Control

    Control Specification SiUS121736EA 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 frequency and takes priority over the lower limit control of four way valve operation compensation.

  • Page 111: Freeze-Up Protection Control

    SiUS121736EA Control Specification Freeze-up Protection Control 4.7.1 Freeze-up Protection Control (Except FDMQ Series) Applicable CTXG09/12/18QVJUW(S) Models FTXR09/12/18TVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU CDXS07/15/18/24LVJU FDXS09/12LVJU FVXS09/12/15/18NVJU FFQ09/12/15/18Q2VJU Outline During cooling operation, the signals sent from the indoor units control the operating frequency limitation and prevent freezing of the indoor heat exchanger. (The signals from the indoor units are divided into zones.) Details The operating frequency limitation is judged with the indoor heat exchanger temperature 2 seconds...
  • Page 112 Control Specification SiUS121736EA 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 113: Heating Peak-Cut Control

    SiUS121736EA 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 seconds after the number of operation room is changed.

  • Page 114: Outdoor Fan Control

    Control Specification SiUS121736EA Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF control during defrosting The outdoor fan is turned OFF while defrosting.

  • Page 115: Defrost Control

    SiUS121736EA Control Specification 4.11 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish defrosting. Details Conditions for Starting Defrost The starting conditions are determined with the outdoor temperature and the outdoor heat exchanger temperature.

  • Page 116: Low Hz High Pressure Limit

    Control Specification SiUS121736EA 18 class 24/36 class A (minutes) B (°C) 4 ~ 12 4 ~ 12 C (°F) 39.2 ~ 53.6 39.2 ~ 53.6 D (Hz) E (Hz) F (seconds) G (seconds) H (seconds) J (seconds) K (pulse) L (pulse) M (pulse) N (pulse) P (pulse)

  • Page 117: Electronic Expansion Valve Control

    SiUS121736EA Control Specification 4.13 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Room Distribution Control 1.
  • Page 118 Control Specification SiUS121736EA Details The following are the examples of electronic expansion valve control which function in each operation mode. Operation pattern : Available — : Not available When power is turned on Fully closed when power is turned on —...
  • Page 119 SiUS121736EA Control Specification 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 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 120 Control Specification SiUS121736EA 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 121 SiUS121736EA Control Specification 4.13.10 SC (Subcooling) Control Outline The liquid pipe temperature and the heat exchanger temperature are detected and the electronic expansion valve opening is compensated so that the SC of each room becomes the target SC. When the actual SC is > target SC, open the electronic expansion valve of the room. When the actual SC is <...

  • Page 122: Malfunctions

    Control Specification SiUS121736EA 4.14 Malfunctions 4.14.1 Sensor Malfunction Detection Sensor malfunction may occur either in the thermistor or current transformer (CT) system. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Radiation fin thermistor 4. Gas pipe thermistor 5.

  • Page 123: Part 5 Remote Controller

    SiUS121736EA Part 5 Remote Controller 1. Applicable Remote Controller ..............111 2. ARC466A36 .................... 112 3. ARC452A21 .................... 114 4. ARC452A23 .................... 116 5. ARC466A21 .................... 118 6. Wired Remote Controller (BRC944B2) ........... 120 7. Wired Remote Controller (BRC1E73) .............121 8.

  • Page 124: Applicable Remote Controller

    Applicable Remote Controller SiUS121736EA 1. Applicable Remote Controller Wired Remote Indoor Unit Wireless Remote Reference Page Model Name Reference Page Controller Type Controller CTXG09QVJUW(S) CTXG12QVJUW(S) CTXG18QVJUW(S) ARC466A36 FTXR09TVJUW(S) FTXR12TVJUW(S) FTXR18TVJUW(S) CTXS07LVJU FTXS09LVJU FTXS12LVJU ARC452A21 BRC944B2 FTXS15LVJU FTXS18LVJU FTXS24LVJU CDXS07LVJU FDXS09LVJU FDXS12LVJU ARC452A23 CDXS15LVJU...

  • Page 125: Arc466A36

    SiUS121736EA ARC466A36 2. ARC466A36 Signal transmitter Receiver 19-11/16” Display (LCD) (50 cm) or more • Displays the current settings. (In this illustration, each section is shown with all its displays on for the • To use the remote controller, aim the purpose of explanation.) transmitter at the indoor unit.
  • Page 126 ARC466A36 SiUS121736EA Open the Front Cover Mode button • Selects the operation mode. AUTO COOL HEAT Econo / Quiet button • Every time you press Econo/Quiet button, the setting changes in the following order. Lamp brightness ECONO OUTDOOR UNIT setting button QUIET •...

  • Page 127: Arc452A21

    SiUS121736EA ARC452A21 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 128 ARC452A21 SiUS121736EA Open the Front Cover MODE button • Selects the operation mode. AUTO COOL HEAT ECONO button • Starts ECONO operation. QUIET button SWING buttons • Starts OUTDOOR UNIT • Adjusts the airflow direction. QUIET operation. • When you press SWING •...

  • Page 129: Arc452A23

    SiUS121736EA ARC452A23 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 130 ARC452A23 SiUS121736EA Open the Front Cover MODE button • Selects the operation mode. AUTO COOL HEAT 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 131: Arc466A21

    SiUS121736EA ARC466A21 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 • To use the remote controller, aim the transmitter at the indoor unit.
  • Page 132 ARC466A21 SiUS121736EA Open the Front Cover Mode button • Selects the operation mode. AUTO COOL HEAT Econo button • Starts ECONO operation. Quiet button Swing button • Starts OUTDOOR UNIT • Adjusts the airflow direction. QUIET operation. • When you press Swing •...

  • Page 133: Wired Remote Controller (Brc944B2)

    SiUS121736EA Wired Remote Controller (BRC944B2) 6. Wired Remote Controller (BRC944B2) Remote Controller...

  • Page 134: Wired Remote Controller (Brc1E73)

    Wired Remote Controller (BRC1E73) SiUS121736EA 7. Wired Remote Controller (BRC1E73) 1. Operation mode selector button 11. LCD (with backlight) 4. Up button 5. Down button 6. Right button 7. Left button 9. Operation lamp 8. On/Off button 3. Menu/OK button 10.
  • Page 135 SiUS121736EA Wired Remote Controller (BRC1E73) 1. Operation mode selector button 7. Left button • Press this button to select the operation • Used to highlight the next items on the mode of your preference. left-hand side. • * Available modes vary with the indoor unit Each screen is scrolled in the left-hand model.
  • Page 136 Wired Remote Controller (BRC1E73) SiUS121736EA 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 137 SiUS121736EA Wired Remote Controller (BRC1E73) Simple display 1.Operation mode 14.Selectable Display Item 3.Setpoint 11.Setback 2.Fan speed 4.Stand by for Defrost/ 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 138 Wired Remote Controller (BRC1E73) SiUS121736EA 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 139 SiUS121736EA Wired Remote Controller (BRC1E73) 11. Setback “ ” • The setback icon flashes when the unit is turned on by the setback control. 12. Airflow Direction “ ” Displayed when the airflow direction and • swing are set. • If the connected indoor unit model does not include oscillating louvers this item will not be displayed.

  • Page 140: Wireless Remote Controller (Brc082A43)

    Wireless Remote Controller (BRC082A43) SiUS121736EA 8. Wireless Remote Controller (BRC082A43) ON OFF ON OFF TEMP TIME DOWN DOWN RESERVE CANCEL TIMER MODE TEST TEST TEST The situation which opened the front cover of the remote control (R25006) (R25007) Remote Controller...
  • Page 141 SiUS121736EA Wireless Remote Controller (BRC082A43) 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 142: Wireless Remote Controller (Brc082A41W, Brc082A42W(S))

    Wireless Remote Controller (BRC082A41W, BRC082A42W(S)) SiUS121736EA 9. Wireless Remote Controller (BRC082A41W, BRC082A42W(S)) (R23936) (R23937) Remote Controller...
  • Page 143 SiUS121736EA Wireless Remote Controller (BRC082A41W, BRC082A42W(S)) 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 144: Part 6 Service Diagnosis

    SiUS121736EA Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items ........133 2. Troubleshooting with LED ...............134 2.1 Indoor Unit....................134 2.2 Outdoor Unit ..................... 136 3. Service Diagnosis ................... 137 3.1 RA Indoor Unit..................137 3.2 SA Indoor Unit ..................143 4.
  • Page 145 SiUS121736EA 7.6 Outdoor Unit PCB Abnormality..............187 7.7 OL Activation (Compressor Overload) ............. 188 7.8 Compressor Lock ..................190 7.9 DC Fan Lock .................... 191 7.10 Input Overcurrent Detection ..............192 7.11 Four Way Valve Abnormality..............193 7.12 Discharge Pipe Temperature Control............195 7.13 High Pressure Control in Cooling .............

  • Page 146: General Problem Symptoms And Check Items

    General Problem Symptoms and Check Items SiUS121736EA 1. General Problem Symptoms and Check Items Reference Problem Symptom Check Item Details Page None of the units operates. Check the power supply. Check if the rated voltage is supplied. — Check the types of the indoor units. Check if the indoor unit type is compatible with —...

  • Page 147: Troubleshooting With Led

    SiUS121736EA Troubleshooting with LED 2. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. A protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions.
  • Page 148 Troubleshooting with LED SiUS121736EA FDMQ, FFQ series with wired remote controller (BRC1E73) Operation lamp (green) The error or warning message also blinks on the basic screen. (R23942) FDMQ series with wireless remote controller (BRC082A43) In case of wireless remote controller, a receiver is installed. When the error occurs, the operation lamp on the receiver blinks.

  • Page 149: Outdoor Unit

    SiUS121736EA Troubleshooting with LED 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) Check if the operation modes are all the same for the indoor units connected to multi system outdoor unit? 2) If not, set all the indoor units to the same operation mode and confirm that the operation lamp is not blinking.

  • Page 150: Service Diagnosis

    Service Diagnosis SiUS121736EA 3. Service Diagnosis RA Indoor Unit 3.1.1 ARC452 Series Remote Controller 1. When TIMER CANCEL button is held down for 5 seconds, 00 is displayed on the temperature Method 1 display screen. TIMER CANCEL button < ARC452 Series > (R23945) 2.
  • Page 151 SiUS121736EA Service Diagnosis 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 152 Service Diagnosis SiUS121736EA 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 153 SiUS121736EA Service Diagnosis 3.1.2 ARC466 Series Remote Controller 1. When Timer Cancel button is held down for 5 seconds, 00 is displayed on the temperature Method 1 display screen. Timer Cancel button (R24045) < ARC466 Series > 2. Press Timer Cancel button repeatedly until a long beep sounds. The code indication changes in the sequence shown below.
  • Page 154 Service Diagnosis SiUS121736EA 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 155 SiUS121736EA Service Diagnosis 5. 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. 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.

  • Page 156: Sa Indoor Unit

    Service Diagnosis SiUS121736EA SA Indoor Unit 3.2.1 Wired Remote Controller (BRC1E73) Relations On power-up, the message “Checking the connection. Please standby.” will be displayed on the Between Modes remote controller screen temporarily and then the basic screen will be displayed. To access a mode from the basic screen, refer to the figure below.
  • Page 157 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. Service Diagnosis...
  • Page 158 Service Diagnosis SiUS121736EA 3.2.2 Wireless Remote Controller (BRC082A43, BRC082A41W, BRC082A42W(S)) Relations The following modes can be selected by using INSPECTION/TEST OPERATION button on the Between Modes remote controller. Service data can be obtained. Indoor unit settings can be made. Press INSPECTION/TEST Error code history Filter cleaning sign time OPERATION button for...
  • Page 159 SiUS121736EA 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. 1 short beep Follow steps 3 and 4.
  • Page 160 Service Diagnosis SiUS121736EA 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. 1 short beep No digits match.
  • Page 161 SiUS121736EA 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. 1 long beep Both upper and lower digits match.

  • Page 162: Code Indication On Remote Controller

    Code Indication on Remote Controller SiUS121736EA 4. Code Indication on Remote Controller RA Indoor Unit Error Codes Description Reference Page Normal condition — Indoor unit PCB abnormality Freeze-up protection control, heating peak-cut control DC motor Indoor fan motor or (CTXG, FTXR, CTXS, FTXS, FVXS series) related abnormality AC motor (CDXS, FDXS series) Indoor heat exchanger thermistor or related abnormality...

  • Page 163: Outdoor Unit

    SiUS121736EA Code Indication on Remote Controller Outdoor Unit : ON, : OFF, : Blinks Outdoor Unit LED Indication Error Reference Green Description 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 detection...

  • Page 164: Troubleshooting For Ra Indoor Unit

    Troubleshooting for RA Indoor Unit SiUS121736EA 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 Wrong models interconnected...
  • Page 165 SiUS121736EA 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 Match the compatible the indoor and outdoor models. unit matched? ∗ To secure the connection, Check the connection of disconnect the connectors once connectors.

  • Page 166: Freeze-Up Protection Control, Heating Peak-Cut Control

    Troubleshooting for RA Indoor Unit SiUS121736EA Freeze-up Protection Control, Heating Peak-cut Control Error Code Method of Error Freeze-up protection control Detection During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor. Heating peak-cut control During heating operation, the temperature detected by the indoor heat exchanger thermistor is used for the heating peak-cut control (operation halt, outdoor fan stop, etc.)

  • Page 167: Indoor Fan Motor Or Related Abnormality

    SiUS121736EA Troubleshooting for RA Indoor Unit Indoor Fan Motor or Related Abnormality 5.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable CTXG09/12/18QVJUW(S) Models FTXR09/12/18TVJUW(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 168 Troubleshooting for RA Indoor Unit SiUS121736EA Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply Check No.02 voltage. Refer to P.210 Is the voltage fluctuation Correct the power within ±10% from supply.
  • Page 169 SiUS121736EA Troubleshooting for RA Indoor Unit 5.3.2 Indoor Fan Motor (AC Motor) or Related Abnormality Applicable CDXS07/15/18/24LVJU Models FDXS09/12LVJU 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 170 Troubleshooting for RA Indoor Unit SiUS121736EA Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.04 Refer to P.211 Check the power supply voltage. Is the voltage fluctuation Correct the power supply.

  • Page 171: Thermistor Or Related Abnormality

    SiUS121736EA Troubleshooting for RA Indoor Unit 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 172: Front Panel Open/Close Fault

    Troubleshooting for RA Indoor Unit SiUS121736EA Front Panel Open/Close Fault Applicable CTXG09/12/18QVJUW(S) Models FTXR09/12/18TVJUW(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 Defective limit switch Troubleshooting Be sure to turn off the power switch before connecting or disconnecting...

  • Page 173: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    SiUS121736EA Troubleshooting for RA Indoor Unit Signal Transmission Error (Between Indoor Unit 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 174 Troubleshooting for RA Indoor Unit SiUS121736EA Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.11 Check the power supply voltage. Refer to P.211 Is the voltage fluctuation Correct the power supply.

  • Page 175: Mismatching Of Indoor Unit And Outdoor Unit

    SiUS121736EA 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 indoor/outdoor transmission signal. Detection Error Decision The pair type and multi type are interconnected.

  • Page 176: Troubleshooting For Sa Indoor Unit

    Troubleshooting for SA Indoor Unit SiUS121736EA 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 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 177: Drain Level Control System Abnormality

    SiUS121736EA Troubleshooting for SA Indoor Unit Drain Level Control System Abnormality Error Code Method of Error The float switch detects error. Detection Error Decision The water level reaches its upper limit and the float switch turns OFF. Conditions Supposed Defective drain pump Causes Improper drain piping work Clogged drain piping...

  • Page 178: Indoor Fan Motor Or Related Abnormality

    Troubleshooting for SA Indoor Unit SiUS121736EA Indoor Fan Motor or Related Abnormality 6.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality FDMQ09/12/15/18/24RVJU Applicable Models Error Code Method of Error Detection from the current flow on the fan PCB Detection from the rotation speed of the fan motor in operation Detection Error Decision The rotation speed is less than a certain level for 6 seconds.
  • Page 179 SiUS121736EA Troubleshooting for SA Indoor Unit The HAP lamp on the indoor unit control PCB is blinking while the HAP lamp on the fan PCB is not blinking. Turn OFF the power supply Turn OFF the power supply and wait for 10 minutes. and wait for 10 minutes.
  • Page 180 Troubleshooting for SA Indoor Unit SiUS121736EA 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 181 SiUS121736EA 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. Check No.02 Refer to P.210 Is the voltage fluctuation within Correct the power ±10% from the rated supply.

  • Page 182: Indoor Fan Pcb Abnormality

    Troubleshooting for SA Indoor Unit SiUS121736EA 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 Defective fan PCB...

  • Page 183: Humidifier Or Related Abnormality

    SiUS121736EA Troubleshooting for SA Indoor Unit 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 Defective float switch...

  • Page 184: Thermistor Or Related Abnormality

    Troubleshooting for SA Indoor Unit SiUS121736EA 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 Disconnection of connector...

  • Page 185: Presence Sensor Or Floor Sensor Abnormality

    SiUS121736EA Troubleshooting for SA Indoor Unit 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 Disconnection of connector...

  • Page 186: Remote Controller Thermistor Abnormality

    Troubleshooting for SA Indoor Unit SiUS121736EA Remote Controller Thermistor Abnormality Error Code Method of Error Even if remote controller thermistor is faulty, system is possible to operate by system thermistor. Malfunction detection is carried out by the temperature detected by the remote controller Detection thermistor.

  • Page 187: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    SiUS121736EA Troubleshooting for SA Indoor Unit Signal Transmission Error (Between Indoor Unit 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 188 Troubleshooting for SA Indoor Unit SiUS121736EA Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.11 Check the power supply voltage. Refer to P.211 Is the voltage fluctuation Correct the power supply.

  • Page 189: Signal Transmission Error (Between Indoor Unit And Remote Controller)

    SiUS121736EA Troubleshooting for SA Indoor Unit 6.10 Signal Transmission Error (Between Indoor Unit and Remote Controller) Error Code Method of Error In case of controlling 1 indoor unit with 2 remote controllers, check the system using microcomputer if signal transmission between indoor unit and remote controller (main and sub) is normal. Detection Error Decision Normal transmission does not continue for specified period.

  • Page 190: Signal Transmission Error (Between Main Remote Controller And Sub Remote Controller)

    Troubleshooting for SA Indoor Unit SiUS121736EA 6.11 Signal Transmission Error (Between MAIN Remote Controller and SUB Remote Controller) Error Code Method of Error In case of controlling 1 indoor unit with 2 remote controllers, check the system using microcomputer if signal transmission between MAIN remote controller and SUB remote controller is normal. Detection Error Decision Normal transmission does not continue for specified period.

  • Page 191: Mismatching Of Indoor Unit And Outdoor Unit

    SiUS121736EA Troubleshooting for SA Indoor Unit 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 Improper power supply wiring of indoor unit Improper wiring of connecting wires between indoor/outdoor units Troubleshooting...

  • Page 192: Troubleshooting For Outdoor Unit

    Troubleshooting for Outdoor Unit SiUS121736EA 7. Troubleshooting for Outdoor Unit Refrigerant Shortage Error Code Outdoor Unit LED Display Method of Error Refrigerant shortage is detected by checking the input current value and the compressor running Detection frequency. If there is insufficient refrigerant, the input current tends to be lower than the normal value.
  • Page 193 SiUS121736EA Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Be sure to turn off the power switch before connecting or disconnecting Caution Caution connectors, or parts may be damaged. connectors, or parts may be damaged. Check No.01 Refer to P.209 Any thermistor...

  • Page 194: Low-Voltage Detection Or Over-Voltage Detection

    Troubleshooting for Outdoor Unit SiUS121736EA Low-voltage Detection or Over-voltage Detection Error Code Outdoor Unit LED Display Method of Error Indoor Unit Detection The zero-cross detection of the power supply is evaluated by the indoor unit PCB. Outdoor Unit Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit.
  • Page 195 SiUS121736EA 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 196: Wiring Error Check Unexecuted

    Troubleshooting for Outdoor Unit SiUS121736EA Wiring Error Check Unexecuted Error Code Outdoor Unit LED 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 Conditions error check after the memory was cleared.

  • Page 197: Unspecified Voltage (Between Indoor Unit And Outdoor Unit), Anti-Icing Control In Other Rooms

    SiUS121736EA 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 Display Method of Error A wrong connection is detected by checking the combination of indoor and outdoor units on the Detection microcomputer.

  • Page 198: Anti-Icing Control For Indoor Unit

    Troubleshooting for Outdoor Unit SiUS121736EA Anti-Icing Control for Indoor Unit Error Code Outdoor Unit LED 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 199 SiUS121736EA 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 No.01 Check the wiring and piping. Refer to P.209 Check No.12 Wrong wiring or Activate the wiring error check piping? Refer to P.212...

  • Page 200: Outdoor Unit Pcb Abnormality

    Troubleshooting for Outdoor Unit SiUS121736EA Outdoor Unit PCB Abnormality Error Code Outdoor Unit LED Display Method of Error Detect within the program of the microcomputer. Detection Error Decision The program of the microcomputer is in abnormal running order. Conditions Supposed Defective outdoor unit PCB Causes Noise...

  • Page 201: Ol Activation (Compressor Overload)

    SiUS121736EA Troubleshooting for Outdoor Unit OL Activation (Compressor Overload) Error Code Outdoor Unit LED Display Method of Error A compressor overload is detected through compressor OL. Detection Error Decision If the error repeats, the system is shut down. Conditions Reset condition: Continuous run for about 60 minutes without any other error Supposed Disconnection of discharge pipe thermistor Defective discharge pipe thermistor...
  • Page 202 Troubleshooting for Outdoor Unit SiUS121736EA Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Refer to P.209 Discharge pipe thermistor Insert the thermistor in disconnected? position. Check No.12 Refer to P.212 Check No.

  • Page 203: Compressor Lock

    SiUS121736EA Troubleshooting for Outdoor Unit Compressor Lock Error Code Outdoor Unit LED Display Method of Error A compressor lock is detected by checking the compressor running condition through the position Detection detection circuit. Error Decision Judging from the current waveform generated when high-frequency voltage is applied to the Conditions compressor.

  • Page 204: Dc Fan Lock

    Troubleshooting for Outdoor Unit SiUS121736EA DC Fan Lock Error Code Outdoor Unit LED Display Method of Error An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Detection Error Decision The fan does not start in 30 seconds even when the fan motor is running. Conditions If the error repeats, the system is shut down.

  • Page 205: Input Overcurrent Detection

    SiUS121736EA Troubleshooting for Outdoor Unit 7.10 Input Overcurrent Detection Error Code Outdoor Unit LED Display Method of Error Detected by checking the input current value Detection Error Decision The input current is at a certain value (depending on the condition) for 2.5 seconds. Conditions The compressor halts if the error occurs, and restarts automatically after 3-minute standby.

  • Page 206: Four Way Valve Abnormality

    Troubleshooting for Outdoor Unit SiUS121736EA 7.11 Four Way Valve Abnormality Error Code Outdoor Unit LED 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. Error Decision The following condition continues for A seconds after the compressor has started.
  • Page 207 SiUS121736EA 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 No.01 Refer to P.209 Four way valve coil Correct the four way valve disconnected (loose)? coil.

  • Page 208: Discharge Pipe Temperature Control

    Troubleshooting for Outdoor Unit SiUS121736EA 7.12 Discharge Pipe Temperature Control Error Code Outdoor Unit LED Display Method of Error An error is determined with the temperature detected by the discharge pipe thermistor. Detection Error Decision If the temperature detected by the discharge pipe thermistor rises above , the compressor Conditions stops.

  • Page 209: High Pressure Control In Cooling

    SiUS121736EA Troubleshooting for Outdoor Unit 7.13 High Pressure Control in Cooling Error Code Outdoor Unit LED 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. Error Decision The temperature sensed by the outdoor heat exchanger thermistor rises above about °C...

  • Page 210: Compressor Sensor System Abnormality

    Troubleshooting for Outdoor Unit SiUS121736EA 7.14 Compressor Sensor System Abnormality Error Code Outdoor Unit LED Display Method of Error The system checks the power supply voltage and the DC voltage before the compressor starts. Detection The system checks the DC current of the compressor right after the compressor starts. Power DC voltage Module...
  • Page 211 SiUS121736EA Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power. Check the connection of the reactor. Connection OK? Connect the reactor properly.

  • Page 212: Position Sensor Abnormality

    Troubleshooting for Outdoor Unit SiUS121736EA 7.15 Position Sensor Abnormality Error Code Outdoor Unit LED Display Method of Error A compressor start-up failure is detected by checking the compressor running condition through the Detection position detection circuit. Error Decision If the error repeats, the system is shut down. Conditions Reset condition: Continuous run for about 5 minutes without any other error Supposed...
  • Page 213 SiUS121736EA 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 No.15 Turn off the power. Refer to P.214 Check the power supply voltage. Check No.18 Refer to P.216 Is the voltage fluctuation...

  • Page 214: Ct Or Related Abnormality

    Troubleshooting for Outdoor Unit SiUS121736EA 7.16 CT or Related Abnormality Error Code Outdoor Unit LED Display Method of Error A CT or related error is detected by checking the compressor running frequency and CT-detected Detection input current. Error Decision The compressor running frequency is more than Hz and input current is less than Conditions A (Hz)
  • Page 215 SiUS121736EA 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 No.15 Turn off the power. Then, turn on Refer to P.214 the power to restart the system. Start operation.

  • Page 216: Thermistor Or Related Abnormality (Outdoor Unit)

    Troubleshooting for Outdoor Unit SiUS121736EA 7.17 Thermistor or Related Abnormality (Outdoor Unit) H9, J3, J6, J8, J9, P4 Error Code Outdoor Unit LED 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 217 SiUS121736EA 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. Check No.01 Refer to P.209 Turn on the power again. Error displayed Reconnect the connectors again on remote...

  • Page 218: Electrical Box Temperature Rise

    Troubleshooting for Outdoor Unit SiUS121736EA 7.18 Electrical Box Temperature Rise Error Code Outdoor Unit LED Display Method of Error An electrical box temperature rise is detected by checking the radiation fin thermistor with the Detection compressor off. Error Decision With the compressor off, the radiation fin temperature is above Conditions The error is cleared when the temperature drops below To cool the electrical components, the outdoor fan starts when the radiation fin temperature...

  • Page 219: Radiation Fin Temperature Rise

    SiUS121736EA Troubleshooting for Outdoor Unit 7.19 Radiation Fin Temperature Rise Error Code Outdoor Unit LED Display Method of Error A radiation fin temperature rise is detected by checking the radiation fin temperature with the Detection compressor on. Error Decision The radiation fin temperature with the compressor on is above Conditions The error is cleared when the temperature drops below 90°C (194°F)

  • Page 220: Output Overcurrent Detection

    Troubleshooting for Outdoor Unit SiUS121736EA 7.20 Output Overcurrent Detection Error Code Outdoor Unit LED Display Method of Error An output overcurrent is detected by checking the current that flows in the inverter DC section. Detection Error Decision A position signal error occurs while the compressor is running. Conditions A rotation speed error occurs while the compressor is running.
  • Page 221 SiUS121736EA 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 output overcurrent may result from wrong internal wiring. If the system is interrupted by an output Check No.15 overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again.

  • Page 222: Check

    Check SiUS121736EA 8. Check Thermistor Resistance Check Check No.01 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using a multimeter. The data is for reference purpose only. Thermistor temperature Resistance (kΩ) °C °F –20 –4...

  • Page 223: Indoor Fan Motor Connector Check

    SiUS121736EA Check Indoor Fan Motor Connector Check Check No.02 CTXG, FTXR , 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 224: Hall Ic Check

    Check SiUS121736EA Hall IC Check Check No.04 CDXS, FDXS Series 1. Check the connector connection. 2. With the power on, operation off, and the connector connected, check the following. (1) Output voltage of about 5 V between pins 1 and 3. (2) Generation of 3 pulses between pins 2 and 3 when the indoor fan motor is operating.

  • Page 225: Electronic Expansion Valve Check

    SiUS121736EA Check Electronic Expansion Valve Check Check No.12 Conduct the following to check the electronic expansion valve (EV). 1. Check if the EV connector is correctly 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 a latching sound. 3.

  • Page 226: Four Way Valve Performance Check

    Check SiUS121736EA 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 voltage at 208 - 230 Replace the outdoor unit VAC with compressor PCB (main PCB).

  • Page 227: Inverter Analyzer Check

    SiUS121736EA Check Inverter Analyzer Check Check No.15 Characteristics Inverter analyzer: RSUK0917C If an abnormal stop occurs due to compressor startup failure or overcurrent output when using an inverter unit, it is difficult to judge whether the stop is caused by the compressor failure or some other failure (main PCB, power module, etc.).

  • Page 228: Rotation Pulse Check On The Outdoor Unit Pcb

    Check SiUS121736EA Diagnose method (Diagnose according to 6 LEDs lighting status.) (1) If all the LEDs are lit uniformly, the compressor is defective. → Replace the compressor. (2) If the LEDs are not lit uniformly, check the power module. → Refer to Check No.22. (3) If NG in Check No.22, replace the power module.

  • Page 229: Installation Condition Check

    SiUS121736EA Check 8.10 Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction. discharge area. Is the discharged air Change the installation short-circuited? location or direction. Is the outdoor heat Clean the outdoor heat exchanger very dirty? exchanger.

  • Page 230: Outdoor Fan System Check

    Check SiUS121736EA 8.12 Outdoor Fan System Check Check No.19 DC motor Check the outdoor fan system. Fan motor Is the lead wire connector outdoor fan running? Go to Check No. 16. disconnected? Reconnect the connector. Outdoor fan system is functioning. (R21195) 8.13 Main Circuit Short Check Check No.20...

  • Page 231: Capacitor Voltage Check

    SiUS121736EA Check 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.

  • Page 232: Power Module Check

    Check SiUS121736EA 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 233: Part 7 Trial Operation And Field Settings

    SiUS121736EA Part 7 Trial Operation and Field Settings 1. Pump Down Operation................221 2. Forced Cooling Operation ...............222 3. Wiring Error Check Function ..............223 4. Trial Operation ..................225 4.1 RA Indoor Unit..................225 4.2 SA Indoor Unit ..................227 5. Field Settings ..................230 5.1 Outdoor Unit .....................

  • Page 234: Pump Down Operation

    Pump Down Operation SiUS121736EA 1. Pump Down Operation Pump Down In order to protect the environment, be sure to pump down when relocating or disposing the unit. Operation 1. Remove the valve cap from liquid stop valve and gas stop valve. 2.

  • Page 235: Forced Cooling Operation

    SiUS121736EA Forced Cooling Operation 2. Forced Cooling Operation Outline The forced cooling operation is allowed when both the following conditions are met. 1. The outdoor unit is not abnormal and not in the 3-minute standby mode. 2. The outdoor unit is not operating. Protection functions have priority over all other functions during forced cooling operation.

  • Page 236: Wiring Error Check Function

    Wiring Error Check Function SiUS121736EA 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 237 SiUS121736EA Wiring Error Check Function Details Refrigerant flows from Port A and on. The indoor heat exchanger temperatures are detected one by one to check up the matching between the piping and wiring. With this function on, freezing (crackling) noise may be heard from the indoor unit. This is not a problem.

  • Page 238: Trial Operation

    Trial Operation SiUS121736EA 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 239 SiUS121736EA Trial Operation 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) Press Mode button and select operation mode.

  • Page 240: Sa Indoor Unit

    Trial Operation SiUS121736EA 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 241 SiUS121736EA Trial Operation With Wired Remote Controller (BRC1E73) 1. Set to COOL or HEAT operation using the Basic screen remote controller. Cool Set to 2. Press and hold Cancel button for 4 seconds Press and hold Cancel or longer. Service settings menu is button for 4 seconds or displayed.
  • Page 242 Trial Operation SiUS121736EA With Wireless Remote Controller (BRC082A43, BRC082A41W, BRC082A42W(S)) 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 243: Field Settings

    SiUS121736EA Field Settings 5. Field Settings Outdoor Unit 5.1.1 Priority Room Setting Outline 1. Operation mode 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 244 Field Settings SiUS121736EA 5.1.2 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 245: Ra Indoor Unit

    SiUS121736EA Field Settings RA Indoor Unit 5.2.1 Model Type Setting 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 246 Field Settings SiUS121736EA 5.2.2 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 247 SiUS121736EA Field Settings 5.2.3 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 248 Field Settings SiUS121736EA FVXS Series (1) Remove the front grille. (2) Lift the sensor PCB fixing plate and remove the front shield plate. (3) Disconnect the connectors S1, S41, S42. (4) Remove the electric box (1 screw). (5) Pull out the indoor heat exchanger thermistor. (6) Remove the shield plate (8 tabs).
  • Page 249 SiUS121736EA Field Settings Wireless Remote (1) Remove the cover and take it off. (2) Cut the address setting jumper. Controller ARC452 series ARC466 series Jumper Jumper ADDRESS ADDRESS EXIST EXIST (R12065) ∗ Do not cut the left jumper. (R18416) Caution Replace the remote controller if you cut a jumper unintentionally.

  • Page 250: Sa Indoor Unit

    Field Settings SiUS121736EA SA Indoor Unit 5.3.1 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 251 SiUS121736EA 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 252 Field Settings SiUS121736EA Wireless Remote Controller (BRC082A43, BRC082A41W, BRC082A42W(S)) 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: Mode No.
  • Page 253 SiUS121736EA Field Settings 5.3.2 Overview of the Field Settings for FFQ Series First Second Code No. Mode Code Description of setting Approx. Approx. Filter cleaning Longlife 2,500 1,250 — — — — sign interval filter hrs. hrs. (20) Remote controller thermistor Enabled Disabled —...
  • Page 254 Field Settings SiUS121736EA 5.3.3 Overview of the Field Settings for FDMQ Series First Second Code No. Mode Code Description of setting Filter cleaning Approx. Approx. Longlife sign interval 2,500 1,250 — — — — filter (used to change hrs. hrs. filter cleaning display interval Standard...
  • Page 255 SiUS121736EA Field Settings 5.3.4 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 256 Field Settings SiUS121736EA 5.3.5 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 257 SiUS121736EA 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 258 Field Settings SiUS121736EA After Setting Stick the Unit No. label on the receiver and the back of the wireless remote controller. Unit No. label (5) Wireless remote controller (2) (R25081) Note: Set the Unit No. of the receiver and the wireless remote controller to be the equal. If the settings differ, the signal from the remote controller cannot be transmitted.
  • Page 259 SiUS121736EA Field Settings 5.3.6 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 260 Field Settings SiUS121736EA 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 261 SiUS121736EA Field Settings After Setting Affix corresponding unit number labels onto both air outlet of the decoration panel and onto back of the wireless remote controller. (R24066) Note: Set the Unit No. of the receiver and the wireless remote controller to be the equal. If the settings differ, the signal from the remote controller cannot be transmitted.

  • Page 262: Silicone Grease On Power Transistor/Diode Bridge

    Silicone Grease on Power Transistor/Diode Bridge SiUS121736EA 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 263: Part 8 Appendix

    SiUS121736EA Part 8 Appendix 1. Piping Diagrams..................251 1.1 Indoor Unit....................251 1.2 Outdoor Unit ..................... 254 2. Wiring Diagrams..................256 2.1 Indoor Unit....................256 2.2 Outdoor Unit ..................... 263 3. Operation Limit..................267 Appendix...

  • Page 264: Piping Diagrams

    Piping Diagrams SiUS121736EA 1. Piping Diagrams Indoor Unit CTXG09/12QVJUW(S), FTXR09/12TVJUW(S) CTXG18QVJUW(S), FTXR18TVJUW(S) Indoor unit Indoor unit Heat exchanger thermistor Heat exchanger thermistor 1/4 CuT 1/4 CuT Heat exchanger Heat exchanger Cross flow fan Cross flow fan Field piping Field piping 1/4 CuT 1/4 CuT Fan motor...
  • Page 265 SiUS121736EA Piping Diagrams FTXS24LVJU CDXS07LVJU, 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...
  • Page 266 Piping Diagrams SiUS121736EA FVXS09/12NVJU FVXS15/18NVJU INDOOR UNIT INDOOR UNIT MUFFLER ASSY HEAT EXCHANGER MUFFLER ASSY HEAT EXCHANGER 1/4 CuT 9/32 CuT 1/4 CuT 9/32 CuT 1/4 CuT 1/4 CuT 1/4 CuT THERMISTOR THERMISTOR ON HEAT EXCH. ON HEAT EXCH. 1/4 CuT 1/4 CuT 1/4 CuT FIELD PIPING...

  • Page 267: Outdoor Unit

    SiUS121736EA Piping Diagrams Outdoor Unit 2MXS18NMVJU, 2MXS18NMVJUA OUTDOOR UNIT ELECTRONIC EXPANSION VALVE LIQUID PIPE HEAT EXCHANGER THERMISTOR OUTDOOR AIR HEADER 5/16 CuT 1/4 CuT 5/16 CuT THERMISTOR ROOM A (1/4 CuT) FILTER FIELD PIPING 5/16 CuT 5/16 CuT 1/4 CuT LIQUID ROOM B HEAT EXCHANGER...
  • Page 268 Piping Diagrams SiUS121736EA 4MXS36RMVJU, 4MXS36RMVJUA OUTDOOR UNIT ELECTRONIC EXPANSION VALVE LIQUID PIPE HEAT EXCHANGER OUTDOOR AIR THERMISTOR HEADER 5/16 CuT 1/4 CuT 5/16 CuT THERMISTOR ROOM A (1/4 CuT) FILTER 5/16 CuT 5/16 CuT 1/4 CuT ROOM B HEAT EXCHANGER (1/4 CuT) FIELD 1/2 CuT...

  • Page 269: Wiring Diagrams

    SiUS121736EA Wiring Diagrams 2. Wiring Diagrams Indoor Unit CTXG09/12/18QVJUW(S), FTXR09/12/18TVJUW(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 S25-S200 : Connector : Varistor...
  • Page 270 Wiring Diagrams SiUS121736EA 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 271 SiUS121736EA 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 272 Wiring Diagrams SiUS121736EA CDXS07/15/18/24LVJU, FDXS09/12LVJU → 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 273 SiUS121736EA Wiring Diagrams FVXS09/12/15/18NVJU PCB3 PCB2 → RECTIFIER S2W ( 4 ) 3.15A OUTDOOR GRN/YLW FIELD WIRING. MR10 WIRELESS TRANSMISSION REMOTE CIRCUIT CAUTION CONTROLLER PCB4 NOTE THAT OPERATION WILL SIGNAL RESTART AUTOMATICALLY IF RECEIVER THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
  • Page 274 Wiring Diagrams SiUS121736EA FDMQ09/12/15/18/24RVJU 3D112629A Note: A1P: Control PCB A2P: Indoor fan PCB Refer to Part 3 for Printed Circuit Board Connector Wiring Diagram. Appendix...
  • Page 275 SiUS121736EA Wiring Diagrams FFQ09/12/15/18Q2VJU INDOOR UNIT PILOT LAMP (ON-RED) PILOT LAMP PRINTED CIRCUIT BOARD WIRING DIAGRAM WIRELESS REMOTE CONTROLLER C105 CAPACITOR (M1F) (TIMER-GREEN) (RECEIVER/DISPLAY UNIT) DIP SWITCH ON PCB PILOT LAMP (OPTIONAL ACCESSORY) (FILTER SIGN-RED) FUSE (F, 5A, 250V) FLASHING LAMP PILOT LAMP (SERVICE MONITOR GREEN) (DEFROST-ORANGE)

  • Page 276: Outdoor Unit

    Wiring Diagrams SiUS121736EA Outdoor Unit 2MXS18NMVJU GRN/YLW PCB2 POWER SUPPLY IN CASE OF S501 S502 Z2C N=4 11 1 HEAT PUMP TYPE TO INDOOR UNIT ROOM B X11A Z5C N=2 PCB1 S201 S202 TO INDOOR UNIT ROOM A MRM20 MRM10 3.15A V401 3.15A...
  • Page 277 SiUS121736EA Wiring Diagrams 2MXS18NMVJUA WIRING DIAGRAM GRN/YLW PCB2 POWER SUPPLY S501 S502 TO INDOOR UNIT X11A ROOM B PCB1 S201 S202 TO INDOOR UNIT ROOM A MRM20 MRM10 3.15A V401 3.15A C110 IPM1 ROOM A ROOM B t˚ t˚ t˚ t˚...
  • Page 278 Wiring Diagrams SiUS121736EA 3MXS24RMVJU, 3MXS24RMVJUA WIRING DIAGRAM GRN/YLW PCB2 POWER SUPPLY S501 S502 TO INDOOR UNIT X11A ROOM B PCB1 1 S202 S201 TO INDOOR UNIT ROOM A MRM20 MRM10 TO INDOOR UNIT ROOM C 3.15A W V U V401 3.15A C110 IPM1...
  • Page 279 SiUS121736EA Wiring Diagrams 4MXS36RMVJU, 4MXS36RMVJUA GRN/YLW PCB2 POWER SUPPLY IN CASE OF S501 S502 Z2C N=4 HEAT PUMP TYPE TO INDOOR UNIT ROOM B X11A Z5C N=2 PCB1 11 1 S201 S202 TO INDOOR UNIT ROOM A MRM20 MRM10 TO INDOOR UNIT ROOM C 3.15A V401...

  • Page 280: Operation Limit

    Operation Limit SiUS121736EA 3. Operation Limit 2MXS18NMVJU, 3MXS24RMVJU, 4MXS36RMVJU 2MXS18NMVJUA, 3MXS24RMVJUA, 4MXS36RMVJUA Heating Cooling 114.8 59.9 ( 5˚FDB ) 57.2 73.4 82.4 Notes: Indoor temp. ( ˚FWB ) The graphs are based Indoor temp. (˚FDB) on the following conditions. • Equivalent piping length 25ft •...
  • Page 281 Revision History Month / Year Version Revised contents 01 / 2018 SiUS121736E First edition 06 / 2020 SiUS121736EA Model Addition: FTXR09/12/18TVJUW(S), 2MXS18NMVJUA, 3MXS24RMVJUA, 4MXS36RMVJUA...
  • Page 282 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

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