Page 1 SiUS121630EA Service Manual Multi-Split Type Air Conditioners 2/3/4MXS-N Series [Applied Models] Inverter Multi : Heat Pump...
Page 2 SiUS121630EA Multi-Split Type Air Conditioners 2/3/4MXS-N Series Heat Pump Indoor Unit CTXG09QVJUW FDXS09LVJU FVXS09NVJU FFQ09Q2VJU CTXG09QVJUS FDXS12LVJU FVXS12NVJU FFQ12Q2VJU CTXG12QVJUW CDXS15LVJU FVXS15NVJU FFQ15Q2VJU CTXG12QVJUS CDXS18LVJU FVXS18NVJU FFQ18Q2VJU CTXG18QVJUW CDXS24LVJU CTXG18QVJUS CTXS07LVJU FTXS09LVJU FTXS12LVJU FTXS15LVJU FTXS18LVJU FTXS24LVJU Outdoor Unit 2MXS18NMVJU 3MXS24NMVJU...
Page 3: Table Of Contents
SiUS121630EA 1. Safety Cautions..................vi 1.1 Warnings and Cautions Regarding Safety of Workers.........vi 1.2 Warnings and Cautions Regarding Safety of Users........viii 2. Icons Used ....................xi Part 1 List of Functions ..............1 1. Functions..................... 2 Part 2 Specifications ............... 8 1.
Page 4 SiUS121630EA 2.10 POWERFUL Operation ................54 2.11 Multi-Monitor Lamp/TIMER Lamp .............. 55 2.12 Clock Setting ....................56 2.13 WEEKLY TIMER Operation ............... 57 2.14 Other Functions..................63 3. FFQ Series Functions ................65 3.1 Airflow Direction Control................65 3.2 Fan Speed Control for Indoor Unit ............. 65 3.3 Program Dry Operation ................
Page 5 SiUS121630EA 2.1 Indoor Unit....................119 2.2 Outdoor Unit ..................... 121 3. Service Diagnosis ................... 122 3.1 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series ........122 3.2 FFQ Series ....................128 4. Code Indication on Remote Controller ............ 134 4.1 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series ........134 4.2 FFQ Series ....................
Page 6 SiUS121630EA 7.15 Position Sensor Abnormality ..............181 7.16 CT or Related Abnormality ............... 183 7.17 Thermistor or Related Abnormality (Outdoor Unit)........185 7.18 Electrical Box Temperature Rise.............. 187 7.19 Radiation Fin Temperature Rise .............. 188 7.20 Output Overcurrent Detection ..............189 8.
Page 7: Safety Cautions
SiUS121630EA Safety Cautions 1. Safety Cautions Be sure to read the following safety cautions before conducting repair work. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer. Caution Items The caution items are classified into Warning and...
Page 8 Safety Cautions SiUS121630EA Warning Do not turn the air conditioner on or off by plugging in or unplugging the power cable. Plugging in or unplugging the power cable to operate the equipment may cause an electrical shock or fire. Be sure to wear a safety helmet, gloves, and a safety belt when working in a high place (more than 2 m (6.5 ft)).
Page 9: Warnings And Cautions Regarding Safety Of Users
SiUS121630EA Safety Cautions Caution Conduct welding work in a well-ventilated place. Using a welder in an enclosed room may cause oxygen deficiency. Warnings and Cautions Regarding Safety of Users Warning Do not store the equipment in a room with fire sources (e.g., naked flames, gas appliances, electric heaters).
Page 10 Safety Cautions SiUS121630EA Warning Do not mix air or gas other than the specified refrigerant (R-32 / R-410A / R- 22) in the refrigerant system. If air enters the refrigerant system, an excessively high pressure results, causing equipment damage and injury. If the refrigerant gas leaks, be sure to locate the leaking point and repair it before charging the refrigerant.
Page 11 SiUS121630EA Safety Cautions Caution Check the earth / grounding, and repair it if the equipment is not properly earthed / grounded. Improper earth / grounding may cause an electrical shock. Be sure to measure insulation resistance after the repair, and make sure that the resistance is 1 MΩ...
Page 12: Icons Used
Icons Used SiUS121630EA 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 13: Part 1 List Of Functions
SiUS121630EA Part 1 List of Functions 1. Functions..................... 2 List of Functions...
Page 14: Functions
Functions SiUS121630EA 1. Functions 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) — PAM control —...
Page 15 SiUS121630EA Functions 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 16 Functions SiUS121630EA 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 17 SiUS121630EA Functions 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 — Air filter (prefilter) Compressor Oval scroll compressor...
Page 18 Functions SiUS121630EA Category Functions Category Functions Basic Inverter (with inverter power control) Health & Auto cleaning filter — — Functions Cleanliness Operation limit for cooling — — Air-purifying filter — — Operation limit for heating — — Titanium apatite deodorizing filter —...
Page 19 SiUS121630EA Functions 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. 243 Operation limit for heating Longlife filter (option) —...
Page 20: Part 2 Specifications
SiUS121630EA Part 2 Specifications 1. Indoor Unit....................9 1.1 CTXG Series ....................9 1.2 CTXS, FTXS Series ................... 11 1.3 FDXS, CDXS Series................... 13 1.4 FVXS Series....................15 1.5 FFQ Series ....................16 2. Outdoor Unit....................17 Specifications...
Page 21: Indoor Unit
SiUS121630EA Indoor Unit 1. Indoor Unit CTXG Series 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)
Page 22 Indoor Unit SiUS121630EA 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) Airflow Rate...
Page 23: Ctxs, Ftxs Series
SiUS121630EA Indoor Unit CTXS, FTXS Series 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...
Page 24 Indoor Unit SiUS121630EA 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) Airflow Rate...
Page 25: Fdxs, Cdxs Series
SiUS121630EA Indoor Unit FDXS, CDXS Series 60 Hz, 208 - 230 V FDXS09LVJU FDXS12LVJU Model Cooling Heating Cooling Heating Rated Capacity 9 kBtu/h Class 12 kBtu/h Class External Static Pressure inAq (Pa) 0.12 (30) 0.12 (30) 305 (8.6) 305 (8.6) 305 (8.6) 305 (8.6) 280 (7.9)
Page 26 Indoor Unit SiUS121630EA 60 Hz, 208 - 230 V CDXS24LVJU Model Cooling Heating Rated Capacity 24 kBtu/h Class External Static Pressure inAq (Pa) 0.16 (40) 565 (16.0) 565 (16.0) 523 (14.8) 523 (14.8) Airflow Rate (m³/min) 477 (13.5) 477 (13.5) 395 (11.2) 395 (11.2) Type...
Page 27: Fvxs Series
SiUS121630EA Indoor Unit FVXS Series 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 28: Ffq Series
Indoor Unit SiUS121630EA FFQ Series 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 29: Outdoor Unit
SiUS121630EA Outdoor Unit 2. Outdoor Unit 60 Hz, 208 - 230 V 2MXS18NMVJU Model Cooling Heating — Btu/W·h 9.5 ~ 12.5 — SEER / HSPF 14.0 ~ 18.9 8.2 ~ 10.7 Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC36PXD...
Page 30 Outdoor Unit SiUS121630EA 60 Hz, 208 - 230 V 3MXS24NMVJU Model Cooling Heating — 3.2 ~ 4.6 Btu/W·h 9.7 ~ 12.7 — SEER / HSPF 14.0 ~ 17.9 8.2 ~ 12.5 Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC63AAXD...
Page 31 SiUS121630EA Outdoor Unit 60 Hz, 208 - 230 V 4MXS36NMVJU Model Cooling Heating — 3.5 ~ 4.5 Btu/W·h 7.9 ~ 9.2 — SEER / HSPF 14.0 ~ 17.7 8.2 ~ 12.2 Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC63AAXD...
Page 32: Part 3 Printed Circuit Board Connector Wiring Diagram
SiUS121630EA Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................21 1.1 CTXG09/12/18QVJUW(S)................21 1.2 CTXS07LVJU, FTXS09/12LVJU ..............23 1.3 FTXS15/18/24LVJU ................... 25 1.4 FDXS09/12LVJU, CDXS15/18/24LVJU ............. 27 1.5 FVXS09/12/15/18NVJU................29 1.6 FFQ09/12/15/18Q2VJU................31 2. Wired Remote Controller................32 2.1 BRC1E73 ....................32 3.
Page 33: Indoor Unit
SiUS121630EA Indoor Unit 1. Indoor Unit CTXG09/12/18QVJUW(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 34 Indoor Unit SiUS121630EA 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 35: Ctxs07Lvju, Ftxs09/12Lvju
SiUS121630EA 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 36 Indoor Unit SiUS121630EA 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 37: Ftxs15/18/24Lvju
SiUS121630EA 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 38 Indoor Unit SiUS121630EA 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 39: Fdxs09/12Lvju, Cdxs15/18/24Lvju
SiUS121630EA Indoor Unit FDXS09/12LVJU, CDXS15/18/24LVJU 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 40 Indoor Unit SiUS121630EA 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 41: Fvxs09/12/15/18Nvju
SiUS121630EA 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 42 Indoor Unit SiUS121630EA 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 43: Ffq09/12/15/18Q2Vju
SiUS121630EA 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 44: Wired Remote Controller
Wired Remote Controller SiUS121630EA 2. 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 45: Wireless Remote Controller Kit
SiUS121630EA Wireless Remote Controller Kit 3. Wireless Remote Controller Kit 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 224 for details. 4) SS2 Address setting switch ∗...
Page 46: Outdoor Unit
Outdoor Unit SiUS121630EA 4. 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 213 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 47 SiUS121630EA Outdoor Unit E1, E2 HL1, HN1 V401 S201 U, V, W S202 2P350358-10 2P350358-11 Printed Circuit Board Connector Wiring Diagram...
Page 48 Outdoor Unit SiUS121630EA 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 204 for details. 5) SW2 Operation mode switch ∗...
Page 49: Part 4 Functions And Control
SiUS121630EA Part 4 Functions and Control 1. Common Functions ...................39 1.1 Temperature Control .................. 39 1.2 Frequency Principle..................39 2. CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions....41 2.1 Airflow Direction Control................41 2.2 Fan Speed Control for Indoor Unit ............. 45 2.3 Program Dry Operation ................
Page 50 SiUS121630EA 4.10 Liquid Compression Protection Function............ 89 4.11 Defrost Control ................... 90 4.12 Low Hz High Pressure Limit ............... 91 4.13 Electronic Expansion Valve Control ............92 4.14 Malfunctions ....................97 Functions and Control...
Page 51: Common Functions
SiUS121630EA 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 52 Common Functions SiUS121630EA 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 53: Ctxg, Ctxs, Ftxs, Cdxs, Fdxs, Fvxs Series Functions
SiUS121630EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions 2. CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions Airflow Direction Control Applicable CTXG09/12/18QVJUW(S) CTXS07LVJU Models 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 cooling, dry and heating operation.
Page 54 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS121630EA Auto-Swing The following table explains the auto-swing process for cooling, dry, heating and fan: CTXG Series Flap (up and down) Louver (right and left) Cooling/Dry Heating 09/12/18 class 25˚ 30˚ 30˚ 65˚...
Page 55 SiUS121630EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions 3-D Airflow CTXG, 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 56 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS121630EA Airflow Selection FVXS Series Setting Airflow direction can be set with the airflow selection switch. Open the front panel. Air is blown from the upper outlet only. The blow pattern is automatically decided depending on mode and conditions.
Page 57: Fan Speed Control For Indoor Unit
SiUS121630EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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 58: Program Dry Operation
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS121630EA 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 59: Automatic Operation
SiUS121630EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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.
Page 60: Thermostat Control
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS121630EA 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)
Page 61: Night Set Mode
SiUS121630EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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 62: Econo Operation
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS121630EA ECONO Operation Applicable CTXG09/12/18QVJUW(S) CTXS07LVJU Models FTXS09/12/15/18/24LVJU FDXS09/12LVJU CDXS15/18/24LVJU FVXS09/12/15/18NVJU 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.
Page 63: 2-Area Intelligent Eye Operation
SiUS121630EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions 2-Area INTELLIGENT EYE Operation Applicable CTXG09/12/18QVJUW(S) Models 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 64 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS121630EA 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...
Page 65: Intelligent Eye Operation
SiUS121630EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions INTELLIGENT EYE Operation Applicable CTXS07LVJU FTXS09/12/15/18/24LVJU Models Outline The microcomputer detects the presence of humans in the room with a motion sensor and reduces the capacity when there is nobody in the room in order to save electricity. Details 1.
Page 66: Powerful Operation
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS121630EA 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 67: Multi-Monitor Lamp/Timer Lamp
SiUS121630EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions 2.11 Multi-Monitor Lamp/TIMER Lamp Applicable CTXG09/12/18QVJUW(S) Models 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 68: Clock Setting
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS121630EA 2.12 Clock Setting ARC452 Series The clock can be set by taking the following steps: 1. Press CLOCK button. ARC466 Series → is displayed. MON and blink. 2. Press SELECT or SELECT button to set the clock to the current day of the week.
Page 69: Weekly Timer Operation
SiUS121630EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions 2.13 WEEKLY TIMER Operation Applicable CTXG09/12/18QVJUW(S) CTXS07LVJU Models 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.
Page 70 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS121630EA 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...
Page 71: Functions And Control
SiUS121630EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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.
Page 72 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS121630EA 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]...
Page 73 SiUS121630EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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 74 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS121630EA 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 75: Other Functions
SiUS121630EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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 76 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS121630EA 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 77: Ffq Series Functions
SiUS121630EA FFQ Series Functions 3. FFQ Series Functions Airflow Direction Control 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 78: Program Dry Operation
FFQ Series Functions SiUS121630EA 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 79: Clock And Calendar Setting (With Wired Remote Controller Brc1E73)
SiUS121630EA FFQ Series Functions Clock and Calendar Setting (With Wired Remote Controller BRC1E73) Press Menu/OK button to display the main menu screen. Press buttons to select Clock & Calendar on the main menu screen. Press Menu/OK button to display the clock &...
Page 80 FFQ Series Functions SiUS121630EA 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 81: Schedule Timer Operation (With Wired Remote Controller Brc1E73)
SiUS121630EA FFQ Series Functions Schedule TIMER Operation (With Wired Remote Controller BRC1E73) Outline Day settings are selected from 4 patterns: 7Days 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 82 FFQ Series Functions SiUS121630EA 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 83 SiUS121630EA FFQ Series Functions 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 84 FFQ Series Functions SiUS121630EA 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 85: Setback Function (With Wired Remote Controller Brc1E73)
SiUS121630EA FFQ Series Functions Setback Function (With Wired Remote Controller BRC1E73) The Setback function can be used to maintain the space temperature in an assigned range for an unoccupied period. The setback icon flashes on the LCD of wired remote controller when the unit is turned on by the setback control.
Page 86 FFQ Series Functions SiUS121630EA 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 87: Hot Start Control (In Heating Operation Only)
SiUS121630EA FFQ Series Functions 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 5 min.
Page 88: Presence And Floor Sensors (Option)
FFQ Series Functions SiUS121630EA Presence and Floor Sensors (Option) 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. To use sensor related functions, a wired remote controller (BRC1E73) and optional sensor kit (BRYQ60A2W(S)) are necessary to be installed.
Page 89 SiUS121630EA FFQ Series Functions 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 90 FFQ Series Functions SiUS121630EA 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 91: Other Functions
SiUS121630EA FFQ Series Functions 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 92: Control Specification
Control Specification SiUS121630EA 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 93 SiUS121630EA Control Specification (5) Liquid Pipe Liquid pipe thermistor is used to protect the compressor against liquid attack during cooling Thermistor operation. 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 94: Mode Hierarchy
Control Specification SiUS121630EA 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 95: Frequency Control
SiUS121630EA Control Specification 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 96 Control Specification SiUS121630EA 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 97: Controls At Mode Changing/Start-Up
SiUS121630EA Control Specification Controls at Mode Changing/Start-up 4.4.1 Preheating Control Outline The inverter operation in open phase starts with the conditions of the outdoor temperature and the preheating command from the indoor unit. Details ON Condition When the outdoor temperature is below 20°C (68°F), the inverter operation in open phase starts.
Page 98: Discharge Pipe Temperature Control
Control Specification SiUS121630EA 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 99: Input Current Control
SiUS121630EA Control Specification Input Current Control Outline The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit based on the input current. In case of heat pump models, this control is the upper limit control of frequency and takes priority over the lower limit control of four way valve operation compensation.
Page 100: Freeze-Up Protection Control
Control Specification SiUS121630EA Freeze-up Protection Control 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 after operation starts and 30 seconds after the number of operation room is changed.
Page 101: Outdoor Fan Control
SiUS121630EA Control Specification Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF control during defrosting The outdoor fan is turned OFF while defrosting.
Page 102: Defrost Control
Control Specification SiUS121630EA 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 103: Low Hz High Pressure Limit
SiUS121630EA Control Specification 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 104: Electronic Expansion Valve Control
Control Specification SiUS121630EA 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 105 SiUS121630EA Control Specification 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 106: Pressure Equalizing Control
Control Specification SiUS121630EA 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 107 SiUS121630EA Control Specification 4.13.8 Discharge Pipe Thermistor Disconnection Control Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensing temperature. If the discharge pipe thermistor is disconnected, the electronic expansion valve opens according to the outdoor temperature and the operation frequency, operates for a specified time, and then stops.
Page 108 Control Specification SiUS121630EA 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 109: Malfunctions
SiUS121630EA Control Specification 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 110: Part 5 Remote Controller
SiUS121630EA Part 5 Remote Controller 1. Applicable Remote Controller ..............99 2. ARC466A36 .................... 100 3. ARC452A21 .................... 102 4. ARC452A23 .................... 104 5. ARC466A21 .................... 106 6. BRC1E73 (Wired Remote Controller) .............108 7. BRC082A41W, BRC082A42W(S) (Wireless Remote Controller Kit) ..114 Remote Controller...
Page 111: Applicable Remote Controller
SiUS121630EA Applicable Remote Controller 1. Applicable Remote Controller Model Name Remote Controller Reference Page CTXG09QVJUW(S) ARC466A36 CTXG12QVJUW(S) CTXG18QVJUW(S) CTXS07LVJU ARC452A21 FTXS09LVJU FTXS12LVJU FTXS15LVJU FTXS18LVJU FTXS24LVJU FDXS09LVJU ARC452A23 FDXS12LVJU CDXS15LVJU CDXS18LVJU CDXS24LVJU FVXS09NVJU ARC466A21 FVXS12NVJU FVXS15NVJU FVXS18NVJU FFQ09Q2VJU Wired Remote Controller...
Page 112: Arc466A36
ARC466A36 SiUS121630EA 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 113: Mode Button
SiUS121630EA ARC466A36 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 114: Arc452A21
ARC452A21 SiUS121630EA 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 115 SiUS121630EA ARC452A21 Open the Front Cover MODE button • Selects the operation mode. AUTO COOL HEAT ECONO button • Starts ECONO operation. QUIET button SWING buttons • OUTDOOR UNIT QUIET • Adjusts the airflow direction. operation. • When you press SWING •...
Page 116: Arc452A23
ARC452A23 SiUS121630EA 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 117 SiUS121630EA ARC452A23 Open the Front Cover MODE button • Selects the operation mode. AUTO COOL HEAT ECONO button • Starts ECONO operation. QUIET button • OUTDOOR UNIT QUIET operation. SELECT button • OUTDOOR UNIT QUIET • Changes the ON/OFF TIMER operation is not available in settings.
Page 118: Arc466A21
ARC466A21 SiUS121630EA 5. ARC466A21 Signal transmitter Display (LCD) • Displays the current settings. (In this illustration, each section is shown with all its displays on for the Receiver purpose of explanation.) Temperature • To use the remote controller, aim the transmitter at the indoor unit.
Page 119 SiUS121630EA ARC466A21 Open the Front Cover Mode button • Selects the operation mode. AUTO COOL HEAT Econo button • Starts ECONO operation. Quiet button Swing button • OUTDOOR UNIT QUIET • Adjusts the airflow direction. operation. • When you press Swing •...
Page 120: Brc1E73 (Wired Remote Controller)
BRC1E73 (Wired Remote Controller) SiUS121630EA 6. BRC1E73 (Wired Remote Controller) 1. Operation mode selector button 11. LCD (with backlight) 4. Up button 5. Down button 6. Right button 7. Left button 9. Operation lamp 8. On/Off button 3. Menu/OK button 10.
Page 121: Operation Lamp
SiUS121630EA BRC1E73 (Wired Remote Controller) 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 122 BRC1E73 (Wired Remote Controller) SiUS121630EA 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 123 SiUS121630EA BRC1E73 (Wired Remote Controller) Simple display 1.Operation mode 14.Selectable Display Item 3.Setpoint 11.Setback 2.Fan speed 4.Stand by for Defrost/ <Simple display example> Hot start Note for all display modes • Depending on the field settings, while the indoor unit is stopped, OFF may be displayed instead of the operation mode and/or the setpoint may not be displayed.
Page 124: Operation Mode
BRC1E73 (Wired Remote Controller) SiUS121630EA “Error: Push Menu button” 1. Operation mode “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 125 SiUS121630EA BRC1E73 (Wired Remote Controller) 11. Setback “ ” • The setback icon flashes when the unit is turned on by the setback control. 12. Airflow Direction “ ” Displayed when the airflow direction and • swing are set. If the connected indoor unit model does not •...
Page 126: Brc082A41W, Brc082A42W(S) (Wireless Remote Controller Kit)
BRC082A41W, BRC082A42W(S) (Wireless Remote Controller Kit) SiUS121630EA 7. BRC082A41W, BRC082A42W(S) (Wireless Remote Controller Kit) (R23936) (R23937) Remote Controller...
Page 127 SiUS121630EA BRC082A41W, BRC082A42W(S) (Wireless Remote Controller Kit) 11 TIMER MODE START/STOP BUTTON DISPLAY (SIGNAL TRANSMISSION) 12 TIMER RESERVE/CANCEL BUTTON This lights up when a signal is being 13 AIRFLOW DIRECTION ADJUST BUTTON transmitted. OPERATION MODE SELECTOR BUTTON DISPLAY Press this button to select OPERATION MODE. (OPERATION MODE) 15 FILTER SIGN RESET BUTTON This display shows the current OPERATION...
Page 128: Part 6 Service Diagnosis
SiUS121630EA Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items ........118 2. Troubleshooting with LED ...............119 2.1 Indoor Unit....................119 2.2 Outdoor Unit ..................... 121 3. Service Diagnosis ................... 122 3.1 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series ........122 3.2 FFQ Series ....................
Page 129 SiUS121630EA 7.6 Outdoor Unit PCB Abnormality..............169 7.7 OL Activation (Compressor Overload) ............. 170 7.8 Compressor Lock ..................172 7.9 DC Fan Lock .................... 173 7.10 Input Overcurrent Detection ..............174 7.11 Four Way Valve Abnormality..............175 7.12 Discharge Pipe Temperature Control............177 7.13 High Pressure Control in Cooling .............
Page 130: General Problem Symptoms And Check Items
General Problem Symptoms and Check Items SiUS121630EA 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 131: Troubleshooting With Led
SiUS121630EA Troubleshooting with LED 2. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions.
Page 132 Troubleshooting with LED SiUS121630EA FFQ series with wired remote controller (BRC1E73) Operation lamp (green) The error or warning message also blinks on the basic screen. (R23942) FFQ series with wireless remote controller kit (BRC082A41W, BRC082A42W(S)) In case of wireless remote controller, a transmitter board (A2P) and a receiver (A3P) are installed on indoor unit.
Page 133: Outdoor Unit
SiUS121630EA Troubleshooting with LED Outdoor Unit The outdoor unit has a green LED (LED A) and red LEDs (LED 1 ~ LED 5) on the PCB. When the microcomputer works in order, the LED A blinks, and when the system is in normal condition, the red LEDs are OFF.
Page 134: Service Diagnosis
Service Diagnosis SiUS121630EA 3. Service Diagnosis CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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 <...
Page 135 SiUS121630EA 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 136 Service Diagnosis SiUS121630EA 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 137 SiUS121630EA 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 138 Service Diagnosis SiUS121630EA Method 2 1. Press the center of Temp button and Mode button at the same time. (R24046) 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 139 SiUS121630EA 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 140: Ffq Series
Service Diagnosis SiUS121630EA FFQ Series 3.2.1 Wired Remote Controller (BRC1E73) Relations On power-up, the message “Checking the connection. Please standby.” will be displayed on the remote controller screen temporarily and then the basic screen will be displayed. To access a mode Between Modes from the basic screen, refer to the figure below.
Page 141 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 142 Service Diagnosis SiUS121630EA 3.2.2 Wireless Remote Controller Kit (BRC082A41W, BRC082A42W(S)) Relations The following modes can be selected by using INSPECTION/TEST OPERATION button on the remote controller. Between Modes 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 143 SiUS121630EA 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 144 Service Diagnosis SiUS121630EA 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 145 SiUS121630EA 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 146: Code Indication On Remote Controller
Code Indication on Remote Controller SiUS121630EA 4. Code Indication on Remote Controller CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Error Codes Description Reference Page Normal condition — Indoor unit PCB abnormality Freeze-up protection control/heating peak-cut control DC motor (CTXG, CTXS, FTXS, FVXS series) Indoor fan motor or related abnormality AC motor (CDXS, FDXS series)
Page 147: Outdoor Unit
SiUS121630EA Code Indication on Remote Controller Outdoor Unit : ON, : OFF, : Blinks Outdoor Unit LED Indication Error Reference Green Description Codes Page h 00 Normal condition — Unspecified voltage (between indoor unit and outdoor unit) Anti-icing control in other rooms (U0) Refrigerant shortage h U2...
Page 148: Troubleshooting For Ctxg, Ctxs, Ftxs, Cdxs, Fdxs, Fvxs Series
Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121630EA 5. Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Indoor Unit PCB Abnormality Error Code Method of Error The system checks if the circuit works properly within the microcomputer of the indoor unit. Detection Error Decision The system cannot set the internal settings.
Page 149 SiUS121630EA Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Combination of the indoor and outdoor Match the compatible unit matched? models.
Page 150: Freeze-Up Protection Control/Heating Peak-Cut Control
Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121630EA Freeze-up Protection Control/Heating Peak-cut Control Error Code Method of Error Freeze-up protection control During cooling operation, the freeze-up protection control (operation halt) is activated according Detection 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 151: Indoor Fan Motor Or Related Abnormality
SiUS121630EA Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Indoor Fan Motor or Related Abnormality 5.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable CTXG09/12/18QVJUW(S) CTXS07LVJU Models 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 fan motor operation.
Page 152 Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121630EA 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.192 Is the voltage fluctuation...
Page 153 SiUS121630EA Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 5.3.2 Indoor Fan Motor (AC Motor) or Related Abnormality Applicable FDXS09/12LVJU CDXS15/18/24LVJU 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.
Page 154 Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121630EA 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.192 Check the power supply voltage. Is the voltage fluctuation Correct the power supply.
Page 155: Thermistor Or Related Abnormality
SiUS121630EA Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Thermistor or Related Abnormality C4 , C9 Error Code Method of Error The temperatures detected by the thermistors determine thermistor errors. Detection Error Decision The voltage between the both ends of the thermistor is either 4.96 V or more, or 0.04 V or less with the power on.
Page 156: Front Panel Open/Close Fault
Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121630EA Front Panel Open/Close Fault Applicable CTXG09/12/18QVJUW(S) Models Error Code Error Decision If the error repeats, the system is shut down. Conditions Supposed Defective reduction motor Malfunction or deterioration of the front panel mechanism Causes Defective limit switch Troubleshooting...
Page 157: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)
SiUS121630EA Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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 abnormal.
Page 158 Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121630EA 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.193 Is the voltage fluctuation Correct the power supply.
Page 159: Mismatching Of Indoor Unit And Outdoor Unit
SiUS121630EA Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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 160: Troubleshooting For Ffq Series
Troubleshooting for FFQ Series SiUS121630EA 6. Troubleshooting for FFQ Series 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 161: Drain Level Control System Abnormality
SiUS121630EA Troubleshooting for FFQ Series 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 162: Indoor Fan Motor (Dc Motor) Or Related Abnormality
Troubleshooting for FFQ Series SiUS121630EA Indoor Fan Motor (DC Motor) or Related Abnormality Error Code Method of Error The rotation speed detected by the Hall IC during indoor fan motor operation determines abnormal fan motor operation. Detection Error Decision The fan motor is not revved up. Conditions Supposed Layer short inside the fan motor winding...
Page 163 SiUS121630EA Troubleshooting for FFQ Series Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply voltage. Check No.02 Refer to P.192 Is the voltage fluctuation within Correct the power ±10% from the rated supply.
Page 164: Humidifier Or Related Abnormality
Troubleshooting for FFQ Series SiUS121630EA 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 the system is not operating. Detection Error Decision The float switch changes from ON to OFF while the system is OFF. Conditions Supposed Defective float switch...
Page 165: Thermistor Or Related Abnormality
SiUS121630EA Troubleshooting for FFQ Series Thermistor or Related Abnormality C4 , C5 , C9 Error Code Method of Error The temperatures detected by the thermistors determine thermistor errors. Detection Error Decision The thermistor is disconnected or shorted while the unit is running. Conditions Supposed Disconnection of connector...
Page 166: Presence Sensor Or Floor Sensor Abnormality
Troubleshooting for FFQ Series SiUS121630EA Presence Sensor or Floor Sensor Abnormality 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 167: Remote Controller Thermistor Abnormality
SiUS121630EA Troubleshooting for FFQ Series Remote Controller Thermistor Abnormality Error Code Method of Error Even if remote controller thermistor is faulty, system is possible to operate by system thermistor. Malfunction detection is carried out by the temperature detected by the remote controller Detection thermistor.
Page 168: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)
Troubleshooting for FFQ Series SiUS121630EA 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 abnormal.
Page 169 SiUS121630EA Troubleshooting for FFQ Series 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.193 Is the voltage fluctuation Correct the power supply. within ±10% from the rated value? Check the connection wires...
Page 170: Signal Transmission Error (Between Indoor Unit And Remote Controller)
Troubleshooting for FFQ Series SiUS121630EA 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 171: Signal Transmission Error (Between Main Remote Controller And Sub Remote Controller)
SiUS121630EA Troubleshooting for FFQ Series 6.10 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 172: Mismatching Of Indoor Unit And Outdoor Unit
Troubleshooting for FFQ Series SiUS121630EA 6.11 Mismatching of Indoor Unit and Outdoor Unit Error Code Error Decision Improper combination of indoor and outdoor units Conditions Supposed Defective indoor unit PCB Indoor-outdoor unit transmission wiring error Causes Defective optional unit(s) wirings Improper power supply wiring of indoor unit Improper wiring of connecting wires between indoor/outdoor units Troubleshooting...
Page 173: Troubleshooting For Outdoor Unit
SiUS121630EA Troubleshooting for Outdoor Unit 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 frequency. If there is insufficient refrigerant, the input current tends to be lower than the normal Detection value.
Page 174 Troubleshooting for Outdoor Unit SiUS121630EA 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.191 Any thermistor...
Page 175: Low-Voltage Detection Or Over-Voltage Detection
SiUS121630EA Troubleshooting for Outdoor Unit 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 176 Troubleshooting for Outdoor Unit SiUS121630EA 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 177: Wiring Error Check Unexecuted
SiUS121630EA Troubleshooting for Outdoor Unit 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 error check after the memory was cleared.
Page 178: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)/Anti-Icing Control In Other Rooms
Troubleshooting for Outdoor Unit SiUS121630EA 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 microcomputer.
Page 179: Anti-Icing Control For Indoor Unit
SiUS121630EA Troubleshooting for Outdoor Unit 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 indoor heat exchanger thermistor and room temperature thermistor that are located in a shut-down Detection room.
Page 180 Troubleshooting for Outdoor Unit SiUS121630EA 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.191 Check the wiring and piping. Check No.12 Wrong wiring or Activate the wiring error check piping? Refer to P.194...
Page 181: Outdoor Unit Pcb Abnormality
SiUS121630EA Troubleshooting for Outdoor Unit 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 182: Ol Activation (Compressor Overload)
Troubleshooting for Outdoor Unit SiUS121630EA 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. Reset condition: Continuous run for about 60 minutes without any other error Conditions Supposed Disconnection of discharge pipe thermistor...
Page 183 SiUS121630EA 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.191 Discharge pipe thermistor Insert the thermistor in disconnected? position. Check No.12 Refer to P.194 Check No.
Page 184: Compressor Lock
Troubleshooting for Outdoor Unit SiUS121630EA 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 circuit. Detection Error Decision Judging from the current waveform generated when high-frequency voltage is applied to the compressor.
Page 185: Dc Fan Lock
SiUS121630EA Troubleshooting for Outdoor Unit 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. If the error repeats, the system is shut down.
Page 186: Input Overcurrent Detection
Troubleshooting for Outdoor Unit SiUS121630EA 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. The compressor halts if the error occurs, and restarts automatically after 3-minute standby.
Page 187: Four Way Valve Abnormality
SiUS121630EA Troubleshooting for Outdoor Unit 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 function within their normal ranges in the operating mode. Detection Error Decision The following condition continues for A seconds after the compressor has started.
Page 188 Troubleshooting for Outdoor Unit SiUS121630EA 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.191 Four way valve coil Correct the four way valve disconnected (loose)? coil.
Page 189: Discharge Pipe Temperature Control
SiUS121630EA Troubleshooting for Outdoor Unit 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 stops.
Page 190: High Pressure Control In Cooling
Troubleshooting for Outdoor Unit SiUS121630EA 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 temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection Error Decision The temperature sensed by the outdoor heat exchanger thermistor rises above about...
Page 191: Compressor Sensor System Abnormality
SiUS121630EA Troubleshooting for Outdoor Unit 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. The system checks the DC current of the compressor right after the compressor starts. Detection Power DC voltage...
Page 192 Troubleshooting for Outdoor Unit SiUS121630EA 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 193: Position Sensor Abnormality
SiUS121630EA Troubleshooting for Outdoor Unit 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 position detection circuit. Detection 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 194 Troubleshooting for Outdoor Unit SiUS121630EA 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.196 Check the power supply voltage. Check No.18 Refer to P.198 Is the voltage fluctuation...
Page 195: Ct Or Related Abnormality
SiUS121630EA Troubleshooting for Outdoor Unit 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 input current. Detection Error Decision The compressor running frequency is more than Hz and input current is less than Conditions A (Hz)
Page 196 Troubleshooting for Outdoor Unit SiUS121630EA 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.196 the power to restart the system. Check No.21 Start operation.
Page 197: Thermistor Or Related Abnormality (Outdoor Unit)
SiUS121630EA Troubleshooting for Outdoor Unit 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. A thermistor fault is identified based on the temperature sensed by each thermistor.
Page 198 Troubleshooting for Outdoor Unit SiUS121630EA Troubleshooting In case of 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.191 Turn on the power again. Error displayed Reconnect the connectors again on remote or thermistors.
Page 199: Electrical Box Temperature Rise
SiUS121630EA Troubleshooting for Outdoor Unit 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 compressor off. Detection 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 200: Radiation Fin Temperature Rise
Troubleshooting for Outdoor Unit SiUS121630EA 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 compressor on. Detection Error Decision The radiation fin temperature with the compressor on is above The error is cleared when the temperature drops below Conditions 90°C (194°F)
Page 201: Output Overcurrent Detection
SiUS121630EA Troubleshooting for Outdoor Unit 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. A rotation speed error occurs while the compressor is running.
Page 202 Troubleshooting for Outdoor Unit SiUS121630EA 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 203: Check
SiUS121630EA Check 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 204: Indoor Fan Motor Connector Check
Check SiUS121630EA Indoor Fan Motor Connector Check Check No.02 CTXG, CTXS, FTXS, FVXS Series 1. Check the connection of connector. 2. Check motor power supply voltage output (pins 4 - 7). 3. Check motor control voltage (pins 4 - 3). 4.
Page 205: Power Supply Waveform Check
SiUS121630EA Check Power Supply Waveform Check Check No.11 Measure the power supply waveform between No. 1 and No. 2 on the terminal board, and check the waveform disturbance. Check if the power supply waveform is a sine wave (Fig.1). Check if there is waveform disturbance near the zero-cross (sections circled in Fig.2) [Fig.1] [Fig.2] (R1444)
Page 206: Electronic Expansion Valve Check
Check SiUS121630EA 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 207: Four Way Valve Performance Check
SiUS121630EA Check Four Way Valve Performance Check Check No.13 Turn off the power. Then, turn on the power to restart the system. ∗ Four way valve coil Start heating operation. Cooling/Dry/Defrost: Not energized Heating: energized voltage at 208 - 230 Replace the outdoor unit VAC with compressor PCB (main PCB).
Page 208: Inverter Analyzer Check
Check SiUS121630EA 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 209: Rotation Pulse Check On The Outdoor Unit Pcb
SiUS121630EA Check Diagnose method (Diagnose according to 6 LEDs lighting status.) (1) If all the LEDs are lit uniformly, the compressor is defective. → Replace the compressor. (2) If the LEDs are not lit uniformly, check the power module. → Refer to Check No.22. (3) If NG in Check No.22, replace the power module.
Page 210: Installation Condition Check
Check SiUS121630EA 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 211: Outdoor Fan System Check
SiUS121630EA Check 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 212: Capacitor Voltage Check
Check SiUS121630EA 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 213: Power Module Check
SiUS121630EA Check 8.15 Power Module Check Check No.22 Check to make sure that the voltage between (+) and (–) of the power module is about 0 V before checking. Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.
Page 214: Part 7 Trial Operation And Field Settings
SiUS121630EA Part 7 Trial Operation and Field Settings 1. Pump Down Operation................203 2. Forced Cooling Operation ...............204 3. Wiring Error Check Function ..............205 4. Trial Operation ..................207 4.1 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series ........207 4.2 FFQ Series ....................209 5.
Page 215: Pump Down Operation
SiUS121630EA Pump Down Operation 1. Pump Down Operation Pump Down In order to protect the environment, be sure to conduct pump down operation when relocating or disposing the unit. Operation 1. Remove the valve caps from the liquid stop valve and the gas stop valve. 2.
Page 216: Forced Cooling Operation
Forced Cooling Operation SiUS121630EA 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 217: Wiring Error Check Function
SiUS121630EA Wiring Error Check Function 3. Wiring Error Check Function Outline Wiring error check function is designed for the microcomputer to correct wiring errors itself. If local wiring is unclear in the case of buried piping, for example, just press the wiring error check switch on the outdoor unit.
Page 218 Wiring Error Check Function SiUS121630EA 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 219: Trial Operation
SiUS121630EA Trial Operation 4. Trial Operation CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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 220 Trial Operation SiUS121630EA 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 221: Ffq Series
SiUS121630EA Trial Operation FFQ Series Outline Make sure to install the decoration panel before carrying out trial operation if the wireless remote controller is used. Trial operation should be carried out in either cooling or heating operation. 1. Measure the supply voltage and make sure that it is within the specified range. 2.
Page 222 Trial Operation SiUS121630EA 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 223 SiUS121630EA Trial Operation With Wireless Remote Controller Kit (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 224: Field Settings
Field Settings SiUS121630EA 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 225 SiUS121630EA Field Settings 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 226: Ctxg, Ctxs, Ftxs, Cdxs, Fdxs, Fvxs Series
Field Settings SiUS121630EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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 227: Temperature Display Switch
SiUS121630EA Field Settings 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 228: When 2 Units Are Installed In 1 Room
Field Settings SiUS121630EA 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 229 SiUS121630EA Field Settings 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 230: Jumper Settings
Field Settings SiUS121630EA Wireless Remote (1) Remove the cover and take it off. Controller (2) Cut the address setting jumper. 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 accidentally cut a wrong jumper.
Page 231: Ffq Series
SiUS121630EA Field Settings FFQ Series 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 232 Field Settings SiUS121630EA 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 233 SiUS121630EA Field Settings Wireless Remote Controller Kit (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 234 Field Settings SiUS121630EA 5.3.2 Overview of the Field Settings 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 235 SiUS121630EA Field Settings 5.3.3 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 236 Field Settings SiUS121630EA 5.3.4 Address and MAIN/SUB Setting for Wireless Remote Controller 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 237 SiUS121630EA Field Settings Wireless Remote Factory set is 1. Change the wireless remote controller address setting by the following steps, if Controller necessary. 1. Hold down button and /TEST button at the same time for at least 4 seconds to enter the Address field setting mode.
Page 238 Field Settings SiUS121630EA 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 239: Silicone Grease On Power Transistor/Diode Bridge
SiUS121630EA Silicone Grease on Power Transistor/Diode Bridge 6. Silicone Grease on Power Transistor/Diode Bridge Outline Apply the specified silicone grease to the heat radiation part of a power transistor/diode bridge when you replace an outdoor unit PCB. The silicone grease encourages the heat radiation of a power transistor/diode bridge.
Page 240: Part 8 Appendix
SiUS121630EA Part 8 Appendix 1. Piping Diagrams..................229 1.1 Indoor Unit....................229 1.2 Outdoor Unit ..................... 232 2. Wiring Diagrams..................234 2.1 Indoor Unit....................234 2.2 Outdoor Unit ..................... 240 3. Operation Limit..................243 Appendix...
Page 241: Piping Diagrams
SiUS121630EA Piping Diagrams 1. Piping Diagrams Indoor Unit CTXG09/12QVJUW(S) CTXG18QVJUW(S) Indoor unit Indoor unit Heat exchanger thermistor Heat exchanger thermistor 1/4 CuT 1/4 CuT Heat exchanger Heat exchanger Crossflow fan Crossflow fan Field piping Field piping 1/4 CuT 1/4 CuT Fan motor Fan motor Field piping...
Page 242 Piping Diagrams SiUS121630EA FTXS24LVJU FDXS09/12LVJU INDOOR UNIT INDOOR UNIT 5/16 CuT (1/4CuT) DISTRIBUTOR HEAT EXCHANGER HEAT EXCHANGER THERMISTOR ON HEAT EXCH. THERMISTOR CROSS FLOW FAN FIELD PIPING ON HEAT EXCH. FIELD PIPING (1/4CuT) SIROCCO FAN 1/4 CuT FAN MOTOR FAN MOTOR HEADER FIELD PIPING (3/8CuT)
Page 243 SiUS121630EA Piping Diagrams 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 244: Outdoor Unit
Piping Diagrams SiUS121630EA Outdoor Unit 2MXS18NMVJU OUTDOOR UNIT ELECTRONIC EXPANSION VALVE LIQUID PIPE HEAT EXCHANGER THERMISTOR OUTDOOR AIR HEADER 1/4 CuT 5/16 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 (1/4 CuT)
Page 245 SiUS121630EA Piping Diagrams 4MXS36NMVJU 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 5/16 CuT 5/16 CuT 1/4 CuT ROOM B HEAT EXCHANGER (1/4 CuT) FIELD 1/2 CuT 5/16 CuT...
Page 246: Wiring Diagrams
Wiring Diagrams SiUS121630EA 2. Wiring Diagrams Indoor Unit CTXG09/12/18QVJUW(S) Wiring diagram : Frame ground : Signal receiver F1U, F2U : Fuse : Ground OUTDOOR H1P, H2P : Pilot lamp H1-H3 : Harness GRN/YLW R1T, R2T : Thermistor MR10 : Magnetic relay S25-S200 : Connector : Varistor...
Page 247 SiUS121630EA Wiring Diagrams 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 248 Wiring Diagrams SiUS121630EA FTXS15/18/24LVJU WIRING DIAGRAM 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 249 SiUS121630EA Wiring Diagrams FDXS09/12LVJU, CDXS15/18/24LVJU → V1TR 3.15A OUTDOOR LED LED GRN/YLW FIELD WIRING. TERMINAL FOR CAUTION TRANSMISSION CENTRALIZED CONTROL CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK SIGNAL ON AGAIN. RECEIVER RTH1 H1P~H3P...
Page 250 Wiring Diagrams SiUS121630EA 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 251 SiUS121630EA Wiring Diagrams FFQ09/12/15/18Q2VJU INDOOR UNIT PILOT LAMP (ON-RED) PRINTED CIRCUIT BOARD PILOT LAMP WIRING DIAGRAM WIRELESS REMOTE CONTROLLER C105 (TIMER-GREEN) CAPACITOR (M1F) (RECEIVER/DISPLAY UNIT) DIP SWITCH ON PCB PILOT LAMP (OPTIONAL ACCESSORY) FUSE (F, 5A, 250V) (FILTER SIGN-RED) FLASHING LAMP PILOT LAMP (SERVICE MONITOR GREEN) (DEFROST-ORANGE)
Page 252: Outdoor Unit
Wiring Diagrams SiUS121630EA 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 253 SiUS121630EA Wiring Diagrams 3MXS24NMVJU 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 3.15A ROOM C W V U...
Page 254 Wiring Diagrams SiUS121630EA 4MXS36NMVJU 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 255: Operation Limit
SiUS121630EA Operation Limit 3. Operation Limit 2MXS18NMVJU, 3MXS24NMVJU, 4MXS36NMVJU 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 256 Revision History Month / Year Version Revised contents 09 / 2016 SiUS121630E First edition 03 / 2017 SiUS121630EA Model addition: FFQ18Q2VJU...
Page 257 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.

Daikin CTXG09QVJUW Service Manual

Table of Contents

Part 1 List of Functions

Part 2 Specifications

Part 3 Printed Circuit Board Connector Wiring Diagram

1 Indoor Unit

2 Wired Remote Controller

3 Wireless Remote Controller Kit

4 Outdoor Unit

Part 4 Functions and Control

1 Common Functions

2 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions

3 FFQ Series Functions

4 Control Specification

Part 5 Remote Controller

Part 6 Service Diagnosis

1 General Problem Symptoms and Check Items

2 Troubleshooting with LED

3 Service Diagnosis

4 Code Indication on Remote Controller

5 Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series

6 Troubleshooting for FFQ Series

7 Troubleshooting for Outdoor Unit

8 Check

Part 7 Trial Operation and Field Settings

1 Pump down Operation

2 Forced Cooling Operation

3 Wiring Error Check Function

4 Trial Operation

5 Field Settings

6 Silicone Grease on Power Transistor/Diode Bridge

Quick Links

Chapters

Troubleshooting

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Summary of Contents for Daikin CTXG09QVJUW