SiUS121827E Service Manual Multi-Split Type Air Conditioners 5MXS-T, 4MXL-T Series [Applied Models] Inverter Pair : Heat Pump
SiUS121827E Introduction ....................................................................................... 1 1. Safety Cautions...........................................................................................2 1.1 Warnings and Cautions Regarding Safety of Workers................................. 2 1.2 Warnings and Cautions Regarding Safety of Users..................................... 4 2. Icons Used ..........................................................................................
SiUS121827E 2. RA Indoor Unit Functions ..........................................................................61 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 Airflow Direction Control............................................................................. 61 Fan Speed Control for Indoor Unit ............................................................. 64 Program Dry Operation ..............................................................................
SiUS121827E Part 5 Remote Controller .............................................................. 122 1. 2. 3. 4. 5. 6. 7. 8. 9. Applicable Remote Controller .................................................................123 ARC466A36 ............................................................................................124 ARC452A21 ............................................................................................126 ARC452A23 ...........................................................
SiUS121827E 6.11 Signal Transmission Error (Between MAIN/SUB Remote Controllers) .... 193 6.12 Mismatching of Indoor Unit and Outdoor Unit .......................................... 194 7. Troubleshooting for Outdoor Unit............................................................195 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.10 7.11 7.12 7.13 7.14 7.15 7.16 7.17 7.18 7.19 Refrigerant Shortage ................................................................................
SiUS121827E 5. Field Settings ..........................................................................................256 5.1 RA Indoor Unit.......................................................................................... 256 5.2 SA Indoor Unit .......................................................................................... 262 5.3 Outdoor Unit ............................................................................................. 274 6.
SiUS121827E Introduction 1. Safety Cautions...........................................................................................2 1.1 Warnings and Cautions Regarding Safety of Workers................................. 2 1.2 Warnings and Cautions Regarding Safety of Users..................................... 4 2. Icons Used ..................................................................................................7 3. Revision History ...........................................................
Safety Cautions SiUS121827E 1. Safety Cautions Be sure to read the following safety cautions before conducting repair work. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer. This manual is for the person in charge of maintenance and inspection. Caution Items The caution items are classified into Warning and Caution.
SiUS121827E Safety Cautions Warning Be sure to discharge the capacitor completely before conducting repair work. The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit. A charged capacitor may cause an electrical shock. Do not turn the air conditioner on or off by plugging in or unplugging the power cable. Plugging in or unplugging the power cable to operate the equipment may cause an electrical shock or fire.
Safety Cautions SiUS121827E Caution Be sure to check that the refrigerating cycle section has cooled down enough before conducting repair work. Working on the unit when the refrigerating cycle section is hot may cause burns. Conduct welding work in a well-ventilated place. Using the welder in an enclosed room may cause oxygen deficiency. 1.2 Warnings and Cautions Regarding Safety of Users Warning Do not store the equipment in a room with fire sources (e.g.
SiUS121827E Safety Cautions Warning Do not mix air or gas other than the specified refrigerant (R-32 / R410A / 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. After charging the refrigerant, make sure that there is no leak.
Safety Cautions SiUS121827E Caution Be sure to measure insulation resistance after the repair, and make sure that the resistance is 1 MΩ or higher. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause water to enter the room and wet the furniture and floor. Do not tilt the unit when removing it. The water inside the unit may spill and wet the furniture and floor.
SiUS121827E Icons Used 2. Icons Used The following icons are used to attract the attention of the reader to specific information. Icon Warning Caution Note Reference Introduction Type of Description Information Warning Warning is used when there is danger of personal injury. Caution Note Reference Caution is used when there is danger that the reader, through incorrect manipulation, may damage equipment, lose data, get an unexpected result or have to restart (part of) a procedure.
Revision History SiUS121827E 3.
SiUS121827E Part 1 General Information 1. Applicable Models .....................................................................................10 1.1 Heat Pump ................................................................................................. 10 2. Functions...................................................................................................11 2.1 RA Indoor Unit............................................................................................ 11 2.
Applicable Models SiUS121827E 1. Applicable Models 1.
SiUS121827E Functions 2. Functions 2.
Functions SiUS121827E Category Remote Control Remote Controller Functions Remote control adaptor (normal open pulse contact) Wall Mounted (Non Duct) Type FTXR CTXG CTXS FTXS Option Option Option Option Remote control adaptor (normal open contact) Option Option Option Option DIII-NET compatible (adaptor) Option Option Option Option Wireless LAN connection Option Option Option Option Wireless Wired Option Option Option Option : Available — : Not available 12 Pa
SiUS121827E Functions L.S.P.
Functions SiUS121827E L.S.P.
SiUS121827E Functions Category Functions Basic Function Inverter (with inverter power control) Comfortable Airflow Comfort Control Operation Lifestyle Convenience Health and Cleanliness Timer Worry Free (Reliability & Durability) Flexibility Floor Standing Type FVXS Power-airflow flap (horizontal blade) — Power-airflow dual flaps (horizontal blade) — Power-airflow diffuser — Wide-angle louvers (vertical blades) Auto-swing (up and down) Auto-swing (right and left) — 3-D airflow
Functions SiUS121827E Category Remote Control Remote Controller Functions Remote control adaptor (normal open pulse contact) Floor Standing Type FVXS Option Remote control adaptor (normal open contact) Option DIII-NET compatible (adaptor) Option Wireless LAN connection Option Wireless Wired — : Available — : Not available 16 Part 1 General Information
SiUS121827E 2.2 Functions SA Indoor Unit Category Functions M.S.P.
Functions SiUS121827E Category Flexibility Remote Control Functions M.S.P.
SiUS121827E Functions Ceiling Mounted Type FFQ Category Functions Decoration Panel BYFQ60B3W1 Decoration panel BYFQ60C2W1W(S) With wired R/C With wireless R/C With wired R/C With wireless R/C Basic Function Inverter (with inverter power control) Comfortable Airflow Power-airflow flap (horizontal blade) — — — — Power-airflow dual flaps (horizontal blade) — — — — Power-airflow diffuser — — — — Wide-angle louvers (vertical blades) — — — — Auto-swing (up and down)
Functions SiUS121827E Ceiling Mounted Type FFQ Category Remote Control Remote Controller Functions Decoration Panel BYFQ60B3W1 Decoration panel BYFQ60C2W1W(S) With wired R/C With wireless R/C With wired R/C With wireless R/C Remote control adaptor (normal open pulse contact) — — — — Remote control adaptor (normal open contact) — — — — DIII-NET compatible (adaptor) Option Option Option Option Wireless Option Option Option Option Wired Option Option Option Option : Avail
SiUS121827E 2.3 Functions Outdoor Unit Function Inverter (with inverter power control) Operation limit for cooling (°FDB) Operation limit for heating (°FWB) 5MXS / 4MXL Refer to P.
SiUS121827E Part 2 Specifications 1. Specifications ............................................................................................23 1.1 RA Indoor Unit............................................................................................ 23 1.2 SA Indoor Unit ............................................................................................ 31 1.3 Outdoor Unit ...............................................................................................
SiUS121827E Specifications 1. Specifications 1.1 RA Indoor Unit Model FTXR09TVJUW Cooling Power Supply Rated Capacity Front Panel Color Airflow Rates Fan Air Direction Control Air Filter Running Current (Rated) Power Consumption (Rated) Power Factor (Rated) Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure H / M / L / SL Level Sound Power Level Heat Insulation Piping Connection Liquid Gas Drain Drawing No.
Specifications SiUS121827E Model FTXR18TVJUW Cooling Power Supply Rated Capacity Front Panel Color Airflow Rates Fan Air Direction Control Air Filter Running Current (Rated) Power Consumption (Rated) Power Factor (Rated) Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure H / M / L / SL Level Sound Power Level Heat Insulation Piping Connection Liquid Gas Drain Drawing No. Notes cfm (m3/min) W Steps A W % in. (mm) in.
SiUS121827E Specifications Model CTXG12QVJUW Cooling Power Supply Rated Capacity Front Panel Color Airflow Rates Fan Air Direction Control Air Filter Running Current (Rated) Power Consumption (Rated) Power Factor (Rated) Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure H / M / L / SL Level Sound Power Level Heat Insulation Piping Connection Liquid Gas Drain Drawing No. Notes cfm (m3/min) W Steps A W % in. (mm) in.
Specifications SiUS121827E Model CTXS07LVJU Cooling Power Supply Rated Capacity Front Panel Color Airflow Rates Fan Heating 1φ 60 Hz, 208 - 230 V 7 kBtu/h Class White Phase Hz, V H M L SL Type Motor Output Speed Air Direction Control Air Filter Running Current (Rated) Power Consumption (Rated) Power Factor (Rated) Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure H / M / L / SL Level Sound Power Level Heat Insulation Pi
SiUS121827E Specifications Model FTXS15LVJU Cooling Power Supply Rated Capacity Front Panel Color Airflow Rates Fan Air Direction Control Air Filter Running Current (Rated) Power Consumption (Rated) Power Factor (Rated) Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure H / M / L / SL Level Sound Power Level Heat Insulation Piping Connection Liquid Gas Drain Drawing No.
Specifications SiUS121827E Model FDXS09LVJU FDXS12LVJU Cooling Power Supply Rated Capacity External Static Pressure Airflow Rates H M L SL Fan Type Motor Output Speed Air Filter Running Current (Rated) Power Consumption (Rated) Power Factor (Rated) Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure H/M/L Level Sound Power Level Heat Insulation Piping Connection Liquid Gas Drain Drawing No. Notes inAq (Pa) W Steps A W % in.
SiUS121827E Specifications Model CDXS24LVJU Cooling Power Supply Heating 1φ 60 Hz, 208 - 230 V 24 kBtu/h Class 0.
Specifications SiUS121827E Model FVXS15NVJU Cooling Power Supply Rated Capacity Front Panel Color Airflow Rates Fan Air Direction Control Air Filter Running Current (Rated) Power Consumption (Rated) Power Factor (Rated) Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure H / M / L / SL Level Sound Power Level Heat Insulation Piping Connection Liquid Gas Drain Drawing No. Notes cfm (m3/min) W Steps A W % in. (mm) in.
SiUS121827E 1.2 Specifications SA Indoor Unit Model FDMQ09RVJU Cooling Power Supply Phase Hz, V Rated Capacity Casing Color Dimensions (H × W × D) in. (mm) Coil Type Rows × Stages × Fin per Inch Face Area ft² (m²) Fan Type Motor Output W Airflow Rate cfm H/M/L (m3/min) External Static inH2O Pressure 1 Pa Sound Pressure Level dB(A) Sound Power Level dB(A) Air Filter 2 Weight (Mass) Lbs (kg) Piping Liquid in. (mm) Connection Gas in. (mm) Drain in.
Specifications SiUS121827E Model FDMQ24RVJU Cooling Power Supply Rated Capacity Casing Color Dimensions (H × W × D) in. (mm) Coil Type Rows × Stages × Fin per Inch Face Area ft² (m²) Fan Type Motor Output W Airflow Rate cfm H/M/L (m3/min) External Static inH2O Pressure 1 Pa Sound Pressure Level dB(A) Sound Power Level dB(A) Air Filter 2 Weight (Mass) Lbs (kg) Piping Liquid in. (mm) Connection Gas in. (mm) Drain in. (mm) Remote Wired Controller Wireless (Option) Drawing No.
SiUS121827E Specifications Model FFQ15Q2VJU FFQ18Q2VJU Cooling Power Supply Rated Capacity Decoration Panel (1) Decoration Panel (2) Airflow Rates Fan Model Color Dimensions (H × W × D) Weight (Mass) Model Color Dimensions (H × W × D) Weight (Mass) H M L Type Motor Output Speed Air Direction Control Running Current (Rated) Power Consumption (Rated) Power Factor (Rated) Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure
Specifications 1.3 SiUS121827E Outdoor Unit Model 5MXS48TVJU Cooling Power Supply COP EER W/W Btu/W·h SEER / HSPF Casing Color Compressor Type Model Motor Output Refrigerant Model Oil Charge Refrigerant Type Charge Airflow H Rates M L H M L Fan Type Motor Output Running Current Power Consumption Starting Current Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure Level Piping Liquid Connection Gas Drain Heat Insulation No.
SiUS121827E Specifications Model 4MXL36TVJU Cooling Power Supply COP EER W/W Btu/W·h SEER / HSPF Casing Color Compressor Type Model Motor Output Refrigerant Model Oil Charge Refrigerant Type Charge Airflow H Rates M L H M L Fan Type Motor Output Running Current Power Consumption Starting Current Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure Level Piping Liquid Connection Gas Drain Heat Insulation No. of Wiring Connections Max.
SiUS121827E Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit.................................................................................................37 1.1 1.2 1.3 1.4 1.5 1.6 1.7 FTXR09/12/18TVJUW(S), CTXG09/12/18QVJUW(S) ............................... 37 CTXS07LVJU, FTXS09/12LVJU ................................................................ 39 FTXS15/18/24LVJU ...................................................................................
SiUS121827E Indoor Unit 1. Indoor Unit 1.
Indoor Unit SiUS121827E Display/Signal Receiver PCB (A2P) 1) 2) 3) 4) 5) 6) S51 S52 S1W H1P H2P JA Connector for control PCB (A1P) Connector for room temperature thermistor Indoor unit ON/OFF switch LED for operation (multi-color) LED for INTELLIGENT EYE (green) Address setting jumper ∗ Refer to page 258 for details. H1P H2P S51 S52 JA S1W Caution INTELLIGENT EYE Sensor PCB (A3P) 3P357402-2 Replace the PCB if you cut a jumper unintentionally. Jumpers are necessary for electronic circuit.
SiUS121827E 1.
Indoor Unit SiUS121827E Signal Receiver PCB (PCB2) 1) S48 Connector for control PCB (PCB1) S48 3P210728-1 Display PCB (PCB3) 1) 2) 3) 4) 5) 6) S49 SW1 LED1 (H1P) LED2 (H2P) LED3 (H3P) RTH1 (R1T) Connector for control PCB (PCB1) Indoor unit ON/OFF switch LED for operation (green) LED for timer (yellow) LED for INTELLIGENT EYE (green) Room temperature thermistor RTH1 SW1 LED3 LED2 S49 INTELLIGENT EYE Sensor PCB (PCB4) 1) S26 LED1 3P210728-1 Connector for control PCB (PCB1) S26 3EB86013-1
SiUS121827E 1.3 Indoor Unit FTXS15/18/24LVJU Control PCB (PCB1) 1) 2) 3) 4) 5) 6) 7) 8) 9) S1 S21 S25 S32 S41 S46 S47 H1, H2, H3.
Indoor Unit SiUS121827E Signal Receiver PCB (PCB2) 1) S48 Connector for control PCB (PCB1) S48 3P224121-1 Display PCB (PCB3) 1) 2) 3) 4) 5) 6) S49 SW1 LED1 (H1P) LED2 (H2P) LED3 (H3P) RTH1 (R1T) Connector for control PCB (PCB1) Indoor unit ON/OFF switch LED for operation (green) LED for timer (yellow) LED for INTELLIGENT EYE (green) Room temperature thermistor RTH1 SW1 LED3 S49 INTELLIGENT EYE Sensor PCB (PCB4) 1) S36 LED2 LED1 3P224121-1 Connector for control PCB (PCB1) S36 3P227885-1
SiUS121827E 1.
Indoor Unit SiUS121827E Display/Signal Receiver PCB (A2P) 1) 2) 3) 4) 5) S1 SW1 (S1W) LED2 (H2P) LED3 (H3P) RTH1 (R1T) Connector for control PCB (A1P) Indoor unit ON/OFF switch LED for timer (yellow) LED for operation (green) Room temperature thermistor S1 LED3 LED2 RTH1 1 LED1 SW1 2P084375-1 LED 1 does not function. Note 44 The symbols in the parenthesis are the names on the appropriate wiring diagram.
SiUS121827E 1.
Indoor Unit SiUS121827E Sensor PCB (PCB1) 1) 2) S49 RTH2 (R1T) Connector for control PCB (PCB2) Room temperature thermistor RTH2 S49 3P191450-1 Service PCB (PCB3) 1) 2) S27 SW2 (S2W)-4 3) SW4 (S4W) Connector for control PCB (PCB2) Switch for upward airflow limit setting ∗ Refer to page 261 for details. ∗ Keep the other switches as factory setting. Switch for airflow selection ∗ Refer to page 63 for details.
SiUS121827E 1.
Indoor Unit Indoor Fan PCB (A2P) SiUS121827E 1) 2) 3) 4) 5) 6) 7) X3A X6A X8A X10A F2U F4U HAP Connector for control PCB (A1P) Connector for reactor Connector for indoor fan motor Connector for terminal block (for power supply) Fuse (5 A, 250 V) Fuse (6.
SiUS121827E 1.
Sensor Kit for FFQ Series SiUS121827E 2. Sensor Kit for FFQ Series 2.
SiUS121827E Wired Remote Controller 3. Wired Remote Controller 3.
Wireless Remote Controller Receiver for FDMQ series SiUS121827E 4. Wireless Remote Controller Receiver for FDMQ series 4.1 BRC082A43 Wired Remote Controller PCB 1) SS1 2) SS2 3) P1, P2 MAIN/SUB setting switch ∗ Refer to page 268 for details. Address setting switch ∗ Refer to page 268 for details.
SiUS121827E Wireless Remote Controller Kit for FFQ Series 5. Wireless Remote Controller Kit for FFQ Series 5.1 BRC082A41W, BRC082A42W(S) Transmitter Board (A2P) 1) 2) 3) X1A X2A SS1 4) SS2 Connector for receiver (A3P) Connector for control PCB (A1P) MAIN/SUB setting switch ∗ Refer to page 271 for details. Address setting switch ∗ Refer to page 271 for details.
Outdoor Unit SiUS121827E 6. Outdoor Unit Main PCB (PCB1) 54 1) 2) S, S10 S15 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) S20 (white) S21 (red) S22 (blue) S23 (yellow) S24 (white) S25 (red) S40 S70 S80 S90 13) 14) 15) 16) 17) 18) 19) 20) 21) 22) 23) S92 S93 S201, S202 HL1, HN1 E1, E2, E3 U, V, W FU1 FU2 FU3 FU10 V3, V4, V401 Connector for terminal block (indoor - outdoor transmission) Connector for COOL/HEAT lock ∗ Refer to page 275 for details.
SiUS121827E Outdoor Unit E1 HL1 HN1 V3 V4 E2 E3 FU3 FU10 S10 FU1 S V401 S15 S202 W S201 V U S40 S20 S70 S21 S80 S22 S23 S24 S25 S90 S93 S92 FU2 2P519836-1 Part 3 Printed Circuit Board Connector Wiring Diagram 55
Outdoor Unit Service Monitor PCB (PCB2) SiUS121827E 1) 2) 3) 4) S501, S502 LED A LED1, LED2, LED3, LED4, LED5 SW1 5) SW2 6) SW3 7) SW4 8) SW6-1 Connector for main PCB (PCB1) LED for service monitor (green) LED for service monitor (red) Forced cooling operation ON/OFF switch ∗ Refer to page 248 for details. Operation mode switch ∗ Refer to page 248 for details. Wiring error check switch ∗ Refer to page 249 for details. Priority room setting switch ∗ Refer to page 274 for details.
SiUS121827E Part 4 Functions and Control 1. Common Functions ...................................................................................59 1.1 Temperature Control .................................................................................. 59 1.2 Frequency Principle.................................................................................... 59 2. RA Indoor Unit Functions ..........................................................................61 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.
SiUS121827E 4.10 4.11 4.12 4.13 4.14 58 Liquid Compression Protection Function.................................................. 114 Defrost Control ......................................................................................... 114 Low Hz High Pressure Limit ..................................................................... 116 Electronic Expansion Valve Control ......................................................... 116 Malfunctions .......................................................
SiUS121827E Common Functions 1. Common Functions 1.1 Temperature Control Definitions of Temperatures The definitions of temperatures are classified as following.
Common Functions SiUS121827E When the frequency increases, the rotation speed of the compressor increases resulting in an increase of refrigerant circulation. This leads to a larger amount of heat exchange per unit. When the frequency decreases, the rotation speed of the compressor decreases resulting in a decrease of refrigerant circulation. This leads to a smaller amount of heat exchange per unit.
SiUS121827E RA Indoor Unit Functions 2. RA Indoor Unit Functions 2.1 Airflow Direction Control Applicable Models FTXR09/12/18TVJUW(S) CTXG09/12/18QVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU FVXS09/12/15/18NVJU Power-Airflow (Dual) Flap(s) The large flap sends a large volume of air downward to the floor and provides an optimum control in cooling, dry and heating operation. Cooling/Dry During cooling or dry operation, the flap retracts into the indoor unit.
RA Indoor Unit Functions SiUS121827E FVXS series ° 40 ° 90 ° 90 Upward airflow limit OFF 25° Flap (up and down) Cooling/Dry Heating 20° R4003396 ° 90 ° 90 Upward airflow limit ON 20° R4003397 R4003394 3-D Airflow R4003394 FTXR, 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.
SiUS121827E Airflow Selection Setting RA Indoor Unit Functions FVXS Series Airflow direction can be set with the airflow selection switch. Open the front panel. Front panel Air is blown from the upper outlet only. The blow pattern is automatically decided depending on mode and conditions. (Recommended and factory set.) (R17866) Caution Before opening the front panel, be sure to stop the operation and turn the breaker off.
RA Indoor Unit Functions 2.2 SiUS121827E Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature. Automatic Fan Speed Control In automatic fan speed operation, the step SL is not available.
SiUS121827E 2.3 RA Indoor Unit Functions Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and FAN setting buttons are inoperable. Details The microcomputer automatically sets the temperature and airflow rate. The difference between the room thermistor temperature at start-up and the target temperature is divided into two zones.
RA Indoor Unit Functions 2.4 SiUS121827E Automatic Cooling/Heating Changeover Outline When the automatic operation is selected with the remote controller, the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start-up. The unit automatically switches the operation mode to maintain the room temperature at the set temperature.
SiUS121827E RA Indoor Unit Functions FDXS, CDXS, FVXS Series Cooling Operation Target temperature – 2.0°C (–3.6°F) = Thermostat OFF Target temperature + 2.5°C (+4.5°F) Target temperature + 1.5°C (+2.7°F) = Thermostat OFF Target temperature – 3.0°C (–5.4°F) Heating Operation (R22000) Ex: When the target temperature is 25°C (77°F) Cooling → 23°C (73.4°F): Thermostat OFF → 22°C (71.6°F): Switch to heating Heating → 26.5°C (79.7°F): Thermostat OFF → 27.5°C (81.5°F): Switch to cooling 2.
RA Indoor Unit Functions SiUS121827E CTXS, FTXS Series Room thermistor temperature – target temperature OFF Zone A Zone B 2.0°C (3.6°F) 2.0°C (3.6°F) 1.5°C (2.7°F) Zone C 1.0°C (1.8°F) 0.5°C (0.9°F) ON (R24033) FDXS, CDXS, FVXS Series Room thermistor temperature – target temperature OFF Zone A Zone B 1.5°C (2.7°F) 1.0°C (1.8°F) Zone C 0°C (0°F) ON Reference 2.6 (R24034) Refer to Temperature Control on page 59 for details.
SiUS121827E 2.7 RA Indoor Unit Functions ECONO Operation Outline ECONO operation reduces the maximum operating current and the power consumption. This operation is particularly convenient for energy-saving. It is also a major bonus when breaker capacity does not allow the use of multiple electrical devices and air conditioners. It can be easily activated by pressing ECONO button on the wireless remote controller. Details When this function is activated, the maximum capacity also decreases.
RA Indoor Unit Functions 2.8 SiUS121827E 2-Area INTELLIGENT EYE Operation Applicable Models FTXR09/12/18TVJUW(S) CTXG09/12/18QVJUW(S) Outline The following functions can be performed by the microcomputer and a motion sensor. 1. Reduction of the capacity when there is nobody in the room in order to save electricity (energy saving operation) 2. Dividing the room into plural areas and detecting presence of humans in each area.
SiUS121827E RA Indoor Unit Functions 2. Motions (in cooling) within 20 min. Human detection signal ON OFF within 20 min. within 20 min. 20 min. ↑ Reset ↑ Reset ↑ Reset 1 ~ 2°C (1.8 ~ 3.6 °F) Target temperature Remote controller Sensor button ON OFF Operation ON OFF Set speed Set speed 60 rpm Fan speed (#) OFF (R23920) In FAN operation, the fan speed is reduced by 60 rpm when no one is in the area.
RA Indoor Unit Functions 2.9 SiUS121827E INTELLIGENT EYE Operation Applicable Models CTXS07LVJU FTXS09/12/15/18/24LVJU Outline The microcomputer detects the presence of humans in the room with a motion sensor and reduces the capacity when there is nobody in the room in order to save electricity. Details 1. INTELLIGENT EYE detection method Sampling (20 msec.) Motion sensor output 1 sec.
SiUS121827E Note(s) RA Indoor Unit Functions For dry operation, the temperature cannot be set with a remote controller, but the target temperature is shifted internally. 2.10 POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, the air conditioner can be operated by increasing the indoor fan rotating speed and the compressor frequency.
RA Indoor Unit Functions SiUS121827E 2.11 Multi-Monitor Lamp/TIMER Lamp Applicable Models FTXR09/12/18TVJUW(S) CTXG09/12/18QVJUW(S) Features Current operation mode is displayed in color of the lamp of the indoor unit. Operating status can be monitored even in automatic operation in accordance with the actual operation mode. Multi-monitor lamp/ TIMER lamp (R19925) The lamp color changes according to the operation. ∗ AUTO..................................................Red/Blue ∗ DRY.................
SiUS121827E RA Indoor Unit Functions 2.12 Clock Setting ARC452 Series ARC466 Series The clock can be set by taking the following steps: 1. Press CLOCK button. → is displayed, then MON and blink. 2. Press SELECT or SELECT button to set the clock to the current day of the week. 3. Press CLOCK button. → blinks. 4. Press SELECT or SELECT button to set the clock to the present time. Holding down SELECT or SELECT button rapidly increases or decreases the time display. 5.
RA Indoor Unit Functions SiUS121827E 2.13 WEEKLY TIMER Operation Applicable Models FTXR09/12/18TVJUW(S) CTXG09/12/18QVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU FVXS09/12/15/18NVJU Outline Up to 4 timer settings can be saved for each day of the week (up to 28 settings in total). The 3 items: ON/OFF, temperature, and time can be set. Details The illustrations are for FTXR and CTXG series as representative.
SiUS121827E RA Indoor Unit Functions To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. program 1 program 2 ON OFF ON 8:30 17:30 [Monday] program 3 77°F (25°C) 6:00 program 4 OFF 81°F (27°C) 22:00 Setting Displays Day and number 1. Press ON/OFF Time Temperature . • The day of the week and the reservation number of the current day will be displayed. • 1 to 4 settings can be made per day. 2.
RA Indoor Unit Functions SiUS121827E 6. 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 9 when setting the OFF TIMER. 7. Press . • The time will be set. •“ ” and the temperature blink. 8. Press to select the desired temperature. • The temperature can be set between 50°F (10°C) and 90°F (32°C).
SiUS121827E RA Indoor Unit Functions Copy mode • A reservation made once can be copied to another day of the week. The whole reservation of the selected day of the week will be copied. program 1 program 2 program 3 ON [Monday] OFF 77°F (25°C) 6:00 program 4 ON OFF 81°F (27°C) 8:30 17:30 22:00 COPY program 1 [Tuesday] to [Friday] program 2 program 3 ON OFF ON 8:30 17:30 77°F (25°C) 6:00 program 4 OFF 81°F (27°C) 22:00 Setting Displays Confirmation Copy Paste Normal 1. Press .
RA Indoor Unit Functions SiUS121827E Confirming a reservation • The reservation can be confirmed. Setting Displays Normal Confirmation 1. Press . • The day of the week and the reservation number of the current day will be displayed. 2. Press to select the day of the week and the reservation number to be confirmed. • Pressing displays the reservation details. • To change the confirmed reserved settings, select the reservation number and press . The mode is switched to setting mode.
SiUS121827E RA Indoor Unit Functions To delete reservations An individual reservation 1. Press . • The day of the week and the reservation number will be displayed. 2. Press to select the day of the week and the reservation number to be deleted. 3. Press •“ . ” and “ 4. Press • Pressing ” or “ ” blink. until no icon is displayed. changes the ON/OFF TIMER mode in sequence. • Selecting “blank” will cancel any reservation you may have. blank ON TIMER OFF TIMER 5.
RA Indoor Unit Functions SiUS121827E 2.14 Other Functions 2.14.1 Hot-Start Function In order to prevent the cold air blast that normally occurs when heating operation is started, the temperature of the indoor heat exchanger is detected, and the airflow is either stopped or significantly weakened resulting in comfortable heating. Note(s) The cold air blast is prevented using similar control when defrost control starts or when the thermostat is turned ON. 2.14.
SiUS121827E RA Indoor Unit Functions FVXS Series ON/OFF switch (R23926) 2.14.4 Auto-restart Function If a power failure (even a momentary one) occurs during the operation, the system restarts automatically in the same conditions as before when the power supply is restored to the conditions prior to the power failure. Note It takes 3 minutes to restart the operation because 3-minute standby function is activated.
SA Indoor Unit Functions SiUS121827E 3. SA Indoor Unit Functions 3.1 Airflow Direction Control Applicable Models FFQ09/12/15/18Q2VJU 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. The display of the remote controller and the actual angle of the flap do not match.
SiUS121827E 3.2 SA Indoor Unit Functions Fan Speed Control for Indoor Unit With Wired Remote Controller (BRC1E73) To change the fan speed, press Fan Speed button and select the fan speed from Low/Medium/ High/Auto. Auto cannot be selected if the indoor unit does not have Auto Fan speed function. The system may change the fan speed automatically for equipment protection purposes. The system may turn off the fan when the room temperature is satisfied.
SA Indoor Unit Functions 3.3 SiUS121827E Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and FAN setting buttons are inoperable. Details The microcomputer automatically sets the temperature and airflow rate. The difference between the room thermistor temperature at start-up and the target temperature is divided into two zones.
SiUS121827E 3.4 SA Indoor Unit Functions Clock and Calendar Setting (With Wired Remote Controller BRC1E73) 1 Press Menu/OK button to display the main menu screen. Press buttons to select Clock & Calendar on the main menu screen. Press Menu/OK button to display the clock & calendar screen. 2 Press buttons to select Date & Time on the clock & calendar screen. Press Menu/OK button to display the date & time screen. 3 Select Year with buttons. Change the year with buttons.
SA Indoor Unit Functions SiUS121827E 6 Select Hour with buttons. Change the hour with buttons. Holding down the button causes the number to change continuously. 7 Select Minute with buttons. Change the minute with buttons. Holding down the button causes the number to change continuously. Press Menu/OK button. The confirmation screen will appear. Note: The date can be set between January 1, 2015 and December 31, 2099. 8 Press button to select Yes on the confirmation screen.
SiUS121827E 3.5 SA Indoor Unit Functions Schedule TIMER Operation (With Wired Remote Controller BRC1E73) Outline Day settings are selected from 4 patterns: 7 Days Weekday/Sat/Sun Weekday/Weekend Everyday Up to 5 actions can be set for each day. Details Set the startup time and operation stop time. ON: OFF: __: Reference Startup time, cooling and heating temperature setpoints can be configured. Operation stop time, cooling and heating setback temperature setpoints can be configured.
SA Indoor Unit Functions SiUS121827E Daily Patterns 1 2 3 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 or Everyday on the daily patterns screen. The confirmation screen will appear when Menu/OK button is pressed. Press buttons to select Yes on the confirmation screen.
SiUS121827E SA Indoor Unit Functions Settings 1 2 The schedule screen will appear. Press buttons to select Settings on the schedule screen. The settings screen will appear when Menu/OK button is pressed. Press be set. buttons to select the day to * It cannot be selected in the case of EVDY . 3 Input the time for the selected day. Press buttons to move the highlighted item and press buttons to input the desired operation start time. Each press of buttons moves the numbers by 1 hour or 1 minute.
SA Indoor Unit Functions SiUS121827E 4 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. – –: The temperature setpoints and setback temperature setpoints become disabled. The cooling and heating temperature setpoints for both ON and OFF (Setback) are configured.
SiUS121827E SA Indoor Unit Functions Enabling or disabling the schedule 1 Display the schedule screen. 2 Press buttons to select Enable or Disable on the enable/disable screen. Press Menu/OK button after selecting the item. The confirmation screen is displayed. 3 Press buttons to select Yes on the confirmation screen. Pressing Menu/OK button confirms the enable/disable setting for the schedule and takes you back to the basic screen. Press buttons to select Enable / Disable on the schedule screen.
SA Indoor Unit Functions 3.7 SiUS121827E Drain Pump Control Normal Operation OFF Float switch ON Thermostat ON (running) OFF Error display ON OFF Drain pump ON OFF (R24037) The float switch is ON in normal operation. When cooling operation starts (thermostat ON), the drain pump turns ON simultaneously. After the thermostat turns OFF, the drain pump continues to operate. If Float Switch is OFF with Thermostat ON in Cooling Operation ∗2 ∗3 ∗1 ∗4 OFF Float switch ON 5 sec. 5 sec.
SiUS121827E SA Indoor Unit Functions If Float Switch is OFF with Thermostat OFF in Cooling Operation OFF Float switch ON Thermostat ON (running) OFF Error display A3 ON OFF Drain pump ON OFF 5 sec. 5 min. 5 sec. 5 min. 5 sec. 5 min. (R24611) When the float switch stays OFF for 5 sec., the drain pump turns ON. If the float switch remains OFF even after the residual operation of the drain pump has ended, the error code A3 is determined.
SA Indoor Unit Functions 3.8 Outline SiUS121827E Hot Start Control (In Heating Operation Only) At startup with thermostat ON or after the completion of defrosting in heating operation, the indoor unit fan is controlled to prevent cold air from blasting out and ensure startup capacity. Details Defrost ending or oil return ending or Thermostat ON Hot start ending conditions · Lapse of 3 minutes OR · TH3 > 37°C (98.
SiUS121827E 3.9 SA Indoor Unit Functions Presence and Floor Sensors (Option) Applicable Models FFQ09/12/15/18Q2VJU 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.
SA Indoor Unit Functions SiUS121827E 2. Auto-setback by sensor (with presence sensor) After pre-determined time has elapsed without detection of human presence, the unit automatically shifts the target temperature gradually for energy saving. The target temperature displayed on the remote controller remains same as the initial set value during the above change of target temperature.
SiUS121827E SA Indoor Unit Functions 3. Auto-off by sensor (with presence sensor) After pre-determined time has elapsed without detection of human presence, the unit automatically stops operation. The auto-off time can be set between 1- 24 hours by the hour. Once the unit stops operation by auto-off function, the system would not restart even if the human is detected again.
SA Indoor Unit Functions SiUS121827E 4. Room temperature adjustment by sensing (with floor sensor) The system uses living space temperature calculated from temperatures detected by room temperature thermistor (suction air thermistor in the indoor unit) and floor sensor, as the target temperature. Operation becomes more optimized by using not only suction air temperature but floor temperature.
SiUS121827E SA Indoor Unit Functions FFQ Series Emergency operation switch (R24077) Part 4 Functions and Control 101
Control Specification SiUS121827E 4. Control Specification 4.
SiUS121827E Control Specification In case of low outdoor temperature operation, the system compares the indoor heat exchanger temperature with the liquid pipe temperature to detect disturbances in the refrigerant flow. If any, the system adjusts the opening of the electronic expansion valve to control the refrigerant flow. When only one indoor unit is in heating operation, the liquid pipe thermistor is used for subcooling control.
Control Specification 4.2 Outline SiUS121827E Mode Hierarchy The air conditioner control has normal operation mode, forced operation mode, and power transistor test mode for installation and servicing.
SiUS121827E 4.3 Control Specification Frequency Control Outline Frequency corresponding to each room’s capacity is determined according to the difference between the target temperature and the temperature of each room. When the shift of the frequency is less than zero (ΔF<0) by PI control, the target frequency is used as the command frequency. Dropping function Input current control, etc.
Control Specification SiUS121827E ΔD signal: Indoor frequency command The difference between the room thermistor temperature and the target temperature is taken as the ΔD value and is used for ΔD signal of frequency command. Temperature difference ΔD signal Temperature difference ΔD signal Temperature difference ΔD signal Temperature difference ΔD signal –2.0°C (–3.6°F) ∗OFF 0°C (0°F) 4 2.0°C (3.6°F) 8 4.0°C (7.2°F) 12 –1.5°C (–2.7°F) 1 0.5°C (0.9°F) 5 2.5°C (4.5°F) 9 4.5°C (8.
SiUS121827E 4.4 Control Specification Controls at Mode Changing/Start-up 4.4.1 Preheating Control Outline The inverter operation in open phase starts with the conditions of the outdoor temperature and the preheating command from the indoor unit. Details ON Condition When the outdoor temperature is below 6°C (42.8°F), the inverter operation in open phase starts. OFF Condition When the outdoor temperature is higher than 7.5°C (45.5°F), the inverter operation in open phase stops. 4.4.
Control Specification SiUS121827E 4.4.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. (The function is not used when defrosting.) (Hz) Frequency E D C B A F G H J K (sec.
SiUS121827E 4.5 Outline Control Specification Discharge Pipe Temperature Control The discharge pipe temperature is used as the internal temperature of the compressor. If the discharge pipe temperature rises above a certain level, the upper limit of frequency is set to keep the discharge pipe temperature from rising further. Details Zone Stop zone Dropping zone Keep zone Reset zone Control When the temperature reaches the stop zone, the compressor stops. The upper limit of frequency decreases.
Control Specification 4.6 Outline SiUS121827E Input Current Control The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit based on the input current. In case of heat pump models, this control is the upper limit control of the frequency and takes priority over the lower limit control of four way valve operation compensation.
SiUS121827E 4.7 Control Specification Freeze-up Protection Control 4.7.1 Freeze-up Protection Control (Except FDMQ Series) Applicable Models FTXR09/12/18TVJUW(S) CTXG09/12/18QVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU FDXS09/12LVJU CDXS15/18/24LVJU FVXS09/12/15/18NVJU FFQ09/12/15/18Q2VJU Outline During cooling operation, the signal sent from the indoor unit determines the frequency upper limit and prevents freezing of the indoor heat exchanger. The signals from the indoor unit is divided into zones.
Control Specification SiUS121827E 4.7.2 Freeze-up Protection Control for FDMQ Series Outline During cooling operation, the signal sent from the indoor unit determines the frequency upper limit and prevents the indoor heat exchanger from freezing. Details When the freeze-up protection control starts, the compressor stops, the airflow rate is fixed to L tap, and the drain pump turns ON. Conditions for starting and ending are as below.
SiUS121827E 4.8 Control Specification Heating Peak-cut Control Outline During heating operation, the indoor heat exchanger temperature determines the frequency upper limit to prevent abnormal high pressure. Details The operating frequency is judged with the indoor heat exchanger temperature 2 minutes after the operation starts and F seconds after the number of the rooms in operation is changed.
Control Specification 4.9 SiUS121827E Outdoor Fan Control 1. Fan OFF control during defrosting The outdoor fan is turned OFF while defrosting. 2. Fan OFF delay when stopped The outdoor fan is turned OFF 60 seconds after the compressor stops. 3. Fan speed control for pressure difference upkeep The rotation speed of the outdoor fan is controlled for keeping the pressure difference during cooling operation with low outdoor temperature.
SiUS121827E Control Specification E Hz D Hz PI control Frequency 0 Hz 0 Hz G sec. F sec. Compressor Four way valve H sec. J sec. ON OFF ON OFF 5 sec. Fan 5 sec. ON OFF Electronic expansion valve opening (operating room) Normal control Electronic expansion valve opening (stop room) Normal control K pulse zone L pulse zone P pulse zone M pulse zone N pulse zone Starting control Q pulse zone Starting control (R21926) A (minutes) 30 B (°C) 4 ~ 12 C (°F) 39.2 ~ 53.
Control Specification SiUS121827E 4.12 Low Hz High Pressure Limit Outline The system controls the upper limit of the frequency to prevent abnormal high pressure while the frequency is low. Control is carried out according to three zones. Details A Dropping zone Reset zone Highest indoor heat exchanger temperature among operating rooms Keep zone B C (R14587) A 23 ~ 54°C (73.4 ~ 129.2°F) B 22 ~ 53°C (71.6 ~ 127.4°F) C 19 ~ 50°C (66.2 ~ 122.
SiUS121827E SC (subcooling) control Control when the frequency changes Control for abnormally high discharge pipe temperature Oil recovery control Indoor anti-icing control Liquid pipe temperature control Liquid pipe temperature control for non-operating units Dew prevention control for indoor rotor The following are the examples of the electronic expansion valve control for each operation mode.
Control Specification SiUS121827E 4.13.1 Initialization as Power Supply On The electronic expansion valve is initialized (fully closed) when the power is turned on. Then, the valve opening position is set and the pressure is equalized. 4.13.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalizing control is activated. The electronic expansion valve opens, and develops the pressure equalization. 4.13.
SiUS121827E Control Specification 4.13.8 Discharge Pipe Thermistor Disconnection Control Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensing temperature. If the discharge pipe thermistor is disconnected, the electronic expansion valve opens according to the outdoor temperature and the operation frequency, operates for a specified time, and then stops.
Control Specification SiUS121827E 4.13.11 Target Discharge Pipe Temperature Control The target discharge pipe temperature is obtained from the indoor and outdoor heat exchanger temperature, and the electronic expansion valve opening is adjusted so that the actual discharge pipe temperature becomes close to the target discharge pipe temperature. (Indirect SH (superheating) control using the discharge pipe temperature) SC (Subcooling) The target discharge pipe temperature is set as to become the target SH.
SiUS121827E Control Specification 4.14 Malfunctions 4.14.1 Sensor Malfunction Detection Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Radiation fin thermistor 4. Gas pipe thermistor 5. Outdoor temperature thermistor 6. Liquid pipe thermistor 4.14.2 Detection of Overcurrent and Overload Outline In order to protect the inverter, an excessive output current is detected and the OL temperature is observed to protect the compressor.
SiUS121827E Part 5 Remote Controller 1. 2. 3. 4. 5. 6. 7. 8. 9. 122 Applicable Remote Controller .................................................................123 ARC466A36 ............................................................................................124 ARC452A21 ............................................................................................126 ARC452A23 ............................................................................................128 ARC466A21 ...............
SiUS121827E Applicable Remote Controller 1.
ARC466A36 SiUS121827E 2. ARC466A36 Signal transmitter Receiver 19-11/16” (50 cm) or more Display (LCD) • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate. • The maximum distance for communication is about 19-11/16 ft (6 m).
SiUS121827E ARC466A36 Open the Front Cover Mode button • Selects the operation mode. AUTO DRY COOL HEAT FAN Econo4 / Quiet button • Every time you press Econo/Quiet button, the setting changes in the following order. Lamp brightness setting button ECONO • Each time you press Brightness button, the brightness of the indoor unit display changes to high, low, or off. Blank No setting Combination • OUTDOOR UNIT QUIET operation is not available in FAN and DRY operation.
ARC452A21 SiUS121827E 3. ARC452A21 Signal transmitter Receiver Display (LCD) • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate. • Do not drop the remote controller. Do not get it wet.
SiUS121827E ARC452A21 Open the Front Cover MODE button • Selects the operation mode. AUTO DRY COOL HEAT FAN ECONO4 button • Starts ECONO operation. QUIET button SWING5 buttons • Starts OUTDOOR UNIT QUIET operation. • Adjusts the airflow direction. • When you press SWING button, the flap moves up and down, or (and) the louver moves right and left. The flap (louver) stops when you press SWING button again. • OUTDOOR UNIT QUIET operation is not available in FAN and DRY operation.
ARC452A23 SiUS121827E 4. ARC452A23 Signal transmitter Display (LCD) Receiver • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate. • Do not drop the remote controller. Do not get it wet.
SiUS121827E ARC452A23 Open the Front Cover MODE button • Selects the operation mode. AUTO DRY COOL HEAT FAN ECONO2 button • Starts ECONO operation. QUIET button • Starts OUTDOOR UNIT QUIET operation. SELECT button • OUTDOOR UNIT QUIET operation is not available in FAN and DRY operation. • OUTDOOR UNIT QUIET operation and POWERFUL operation cannot be used at the same time. Priority is given to the function you pressed last. • Changes the ON/OFF TIMER settings.
ARC466A21 SiUS121827E 5. ARC466A21 Signal transmitter Display (LCD) • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) Receiver Temperature adjustment buttons • To use the remote controller, aim the transmitter at the indoor unit. If there is anything blocking the signals between the unit and the remote controller, such as a curtain, the unit may not operate. • The maximum transmission distance is about 23 ft (7 m).
SiUS121827E ARC466A21 Open the Front Cover Mode button • Selects the operation mode. AUTO DRY COOL HEAT FAN Econo2 button • Starts ECONO operation. Quiet button Swing3 button • Starts OUTDOOR UNIT QUIET operation. • OUTDOOR UNIT QUIET operation is not available in FAN and DRY operation. • OUTDOOR UNIT QUIET operation and POWERFUL operation cannot be used at the same time. Priority is given to the function you pressed last. • Adjusts the airflow direction.
BRC944B2 Wired Remote Controller SiUS121827E 6. BRC944B2 Wired Remote Controller R5000214 Caution 132 This remote controller cannot be used together with a standard wireless remote controller. Otherwise, what appears on this remote controller's display may fail to correspond to actual operating conditions.
SiUS121827E BRC1E73 Wired Remote Controller 7. BRC1E73 Wired Remote Controller 1. Operation mode selector button 11. LCD (with backlight) 4. Up button 5. Down button 6. Right button 7. Left button 9. Operation lamp 8. On/Off button 3. Menu/OK button 10. Cancel button 2.
BRC1E73 Wired Remote Controller 1. Operation mode selector button • Press this button to select the operation mode of your preference. * Available modes vary with the indoor unit model. 2. Fan speed control button • Press this button to select the fan speed of your preference. * Available fan speeds vary with the indoor unit model. 3. Menu/OK button • Used to enter the main menu. • Used to enter the selected item. 4. Up button • Used to raise the setpoint.
SiUS121827E BRC1E73 Wired Remote Controller Liquid Crystal Display • Three types of display mode (Standard, Detailed and Simple) are available. • Standard display is set by default. • Detailed and Simple displays can be selected in the main menu. Standard display 10.Changeover controlled by the master indoor unit 9.Under centralized control 11.Setback 8.( ) Scheduled 7.( 1.Operation mode ) Key Lock 3.Setpoint 2.Fan Speed 6.Ventilation 4.Stand by for Defrost/ Hot start 5.
BRC1E73 Wired Remote Controller SiUS121827E Simple display 1.Operation mode 14.Selectable Display Item 3.Setpoint 11.Setback 2.Fan speed 4.Stand by for Defrost/ 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.
SiUS121827E BRC1E73 Wired Remote Controller “Error: Push Menu button” “Warning: Push Menu button” • Displayed if an error or warning is detected. 1. Operation mode • Used to display the current operation mode: Cool, Heat, Vent, Fan, Dry or Auto. • In Auto mode, the actual operation mode (Cool or Heat) will be also displayed. • Operation mode cannot be changed when OFF is displayed. Operation mode can be changed after starting operation.
BRC1E73 Wired Remote Controller 11. Setback “ SiUS121827E ” • The setback icon flashes when the unit is turned on by the setback control. 12. Airflow Direction “ ” • Displayed when the airflow direction and swing are set. • If the connected indoor unit model does not include oscillating louvers this item will not be displayed. 13. Current Day/Time (12/24 hour time display) • Displayed if the clock is set. • If the clock is not set, “ -- : -- ” will be displayed.
SiUS121827E BRC082A43 Wireless Remote Controller 8. BRC082A43 Wireless Remote Controller 1 ON OFF 3 ON OFF 7 TEMP H M L DOWN 9 H M F L TIME UP UP 5 10 F FAN DOWN FAN 4 8 hr. 2 12 RESERVE CANCEL hr. hr. TIMER 11 MODE 13 hr.
BRC082A43 Wireless Remote Controller 1 2 SiUS121827E DISPLAY “ ” “ I ” (SIGNAL TRANSMISSION) This lights up when a signal is being transmitted. 11 TIMER MODE START/STOP BUTTON Use this button for TIMER MODE setting. DISPLAY “ ”“ ”“ (OPERATION MODE) 12 TIMER RESERVE/CANCEL BUTTON Use this button to end timer setting procedure. ”“ ”“ ” This display shows the current OPERATION MODE. 3 DISPLAY “ H M L F ” (SET TEMPERATURE) This display shows the set temperature. 4 DISPLAY “ hr.
SiUS121827E BRC082A41W, BRC082A42W(S) Wireless Remote Controller 9.
BRC082A41W, BRC082A42W(S) Wireless Remote Controller 1 2 DISPLAY (SIGNAL TRANSMISSION) This lights up when a signal is being transmitted. DISPLAY , , (OPERATION MODE) , , This display shows the current OPERATION MODE. 3 DISPLAY This display shows PROGRAMMED TIME of the system start or stop. 5 DISPLAY 7 DISPLAY 12 13 14 16 This button is used only by qualified service persons for maintenance purposes.
SiUS121827E Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items .......................................145 2. Troubleshooting with LED .......................................................................146 2.1 Indoor Unit................................................................................................ 146 2.2 Outdoor Unit ............................................................................................. 149 3. Service Diagnosis ...............................
SiUS121827E 7.3 Wiring Error Check Unexecuted............................................................... 200 7.4 Unspecified Voltage (Between Indoor Unit and Outdoor Unit), Anti-icing Control in Other Rooms............................................................................ 201 7.5 Anti-icing Control for Indoor Unit .............................................................. 202 7.6 Outdoor Unit PCB Abnormality................................................................. 204 7.
SiUS121827E General Problem Symptoms and Check Items 1. General Problem Symptoms and Check Items Symptom None of the units operates. Check Item Details Check the power supply. Check the types of the indoor units. Check the outdoor temperature. Check if the rated voltage is supplied. Check if the indoor unit type is compatible with the outdoor unit. Heating/cooling operations are not available when the outdoor temperature is out of the operation limit. Check the reference page for the operation limit.
Troubleshooting with LED SiUS121827E 2. Troubleshooting with LED 2.1 Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. A protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions. A signal transmission error occurs between the indoor and outdoor units. In either case, conduct the diagnostic procedure described in the following pages.
SiUS121827E Troubleshooting with LED FVXS Series Operation lamp (green) FDMQ, FFQ series with BRC1E73 wired remote controller R4003515 # Operation lamp (green) #The error or warning message also blinks on the basic screen. R4003516 FDMQ series with BRC082A43 wireless remote controller In case of wireless remote controller, a receiver is installed. When the error occurs, the operation lamp on the receiver blinks.
Troubleshooting with LED SiUS121827E Operation lamp (red) R4003518 Caution When operation stops suddenly and the operation lamp blinks, it could be operation mode conflict. For FFQ models, even if the operation mode conflict occurs, the operation lamp does not blink. 1. Check if the operation modes are all the same for the indoor units connected to multi system outdoor unit. 2. If not, set all the indoor units to the same operation mode and confirm that the operation lamp is not blinking. 3.
SiUS121827E 2.2 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. Even after the error is canceled and the unit operates in normal condition, the LED indication remains. Service monitor PCB LED A LED 1 A LED 2 1 LED 3 2 LED 4 3 LED 5 4 5 R6000447 Refer to page 54 for the location of LED.
Service Diagnosis SiUS121827E 3. Service Diagnosis 3.1 ARC452 Series Wireless Remote Controller 3.1.1 Method 1 1. When TIMER CANCEL button is held down for 5 seconds, 00 is displayed on the temperature display screen. 2. Press TIMER CANCEL button repeatedly until a long beep sounds. TIMER CANCEL button < ARC452 Series > (R23945) The code indication changes in the sequence shown below. ARC452A21, A23 No. 1 2 3 4 5 6 7 8 9 10 11 12 Notes 150 Code 00 U4 L5 E6 H6 H0 A6 E7 U0 F3 A5 F6 No.
SiUS121827E Service Diagnosis 3.1.2 Method 2 1. Press the 3 buttons (TEMP, TEMP, MODE) at the same time to enter the diagnosis mode. (R14550) The left-side number blinks. (R9430) 2. Press TEMP or TEMP button and change the number until you hear the two consecutive beeps or the long beep. (R14551) 3. Diagnose by the sound. Beep : The left-side number does not correspond with the error code.
Service Diagnosis SiUS121827E 5. Press TEMP or TEMP button and change the number until you hear the long beep. (R14547) 6. Diagnose by the sound. Beep: The left-side number does not correspond with the error code. Two consecutive beeps: The left-side number corresponds with the error code but the rightside number does not. Long beep: Both the left-side and right-side number corresponds with the error code. 7. Determine the error code.
SiUS121827E 3.2 Service Diagnosis ARC466 Series Wireless Remote Controller 3.2.1 Method 1 1. When Timer Cancel button is held down for 5 seconds, 00 is displayed on the temperature display screen. 2. Press Timer Cancel button repeatedly until a long beep sounds. Timer Cancel button (R24045) < ARC466 Series > The code indication changes in the sequence shown below. ARC466A21, A36 No. 1 2 3 4 5 6 7 8 9 10 Notes Part 6 Service Diagnosis Code 00 A5 E7 F3 F6 L3 L4 L5 U4 E6 No.
Service Diagnosis SiUS121827E 3.2.2 Method 2 1. Press the center of Temp button and Mode button at the same time. (R24046) 5C is displayed on the LCD. (R11821) 2. Select 5C (service check) with Temp or Temp button. 3. Press Mode button to enter the service check mode. (R24047) The left-side number blinks. (R11670) 4. Press Temp or Temp button and change the number until you hear the two consecutive beeps or the long beep. (R24048) 5. Diagnose by the sound.
SiUS121827E Service Diagnosis Long beep: Both the left-side and right-side numbers correspond with the error code. The numbers indicated when you hear the long beep are the error code. Refer to page 162, 163. 6. Press Mode button. (R24047) The right-side number blinks. (R11673) 7. Press Temp or Temp button and change the number until you hear the long beep. (R24048) 8. Diagnose by the sound. Beep: The left-side number does not correspond with the error code.
Service Diagnosis 3.3 SiUS121827E BRC1E73 Wired Remote Controller Relations Between Modes 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 from the basic screen, refer to the figure below. When any of the operation buttons is pressed, the backlight will come on and remain lit for about 30 seconds. Be sure to press a button while the backlight is on.
SiUS121827E Service Diagnosis Service Diagnosis The following message is displayed on the screen when an error (or a warning) occurs during operation. Check the error code and take the corrective action specified for the particular model. Screen Operation lamp Menu/OK button (R18817) Operation 1 Cool If an error occurs, either one of the following items will flash in the basic screen. Set to 74 Error : Push Menu button F Error: Push Menu button * The Operation lamp will flash.
Service Diagnosis 3.4 SiUS121827E BRC082A43, BRC082A41W, BRC082A42W(S) Wireless Remote Controller Relations Between Modes The following modes can be selected by using INSPECTION/TEST OPERATION button on the remote controller. Indoor unit settings can be made. z Filter cleaning sign time Field z Others setting mode Press INSPECTION/TEST OPERATION button for more than 4 seconds. Service mode Press INSPECTION/TEST OPERATION button once. Press INSPECTION/TEST OPERATION button for more than 4 seconds.
SiUS121827E Service Diagnosis Step 2 Action Press UP or DOWN button and change the UNIT No. until the indoor unit starts to beep. UP button DOWN button (R15408) 3 If you hear... Then... 3 short beeps 1 short beep Follow all steps below. Follow steps 3 and 4. Continue the operation in step 4 until you hear a long beep. This long beep indicates that the error code is confirmed. 1 long beep There is no abnormality. Press OPERATION MODE SELECTOR button.
Service Diagnosis SiUS121827E Step 4 Action Press UP or DOWN button to change the error code upper digit until the indoor unit beeps. DOWN 4 5 6 7 8 9 U P L J F H E C A 0 UP button DOWN button UP (R15411) 5 If you hear... 2 short beeps Then... The upper digit matches. 1 short beep 1 long beep No digits match. Both upper and lower digits match. Press OPERATION MODE SELECTOR button. The right 0 (lower digit) indication of the error code blinks.
SiUS121827E Service Diagnosis Step 6 Action Press UP or DOWN button and change the error code lower digit until the indoor unit generates long beep. DOWN F E J C H A 9 8 7 6 5 4 3 2 1 0 UP button DOWN button UP (R15413) 7 If you hear... Then... 2 short beeps 1 long beep No digits match. Both upper and lower digits match. Press OPERATION MODE SELECTOR button to return to the normal mode. If you do not press any button for 1 minute, the remote controller automatically returns to the normal mode.
Code Indication on Remote Controller SiUS121827E 4. Code Indication on Remote Controller 4.1 RA Indoor Unit Error Codes 00 A1 A5 A6 C4 C7 C9 U4 UA 4.
SiUS121827E 4.
Troubleshooting for RA Indoor Unit SiUS121827E 5. Troubleshooting for RA Indoor Unit 5.1 Indoor Unit PCB Abnormality Error Code A1 Method of Error Detection The system checks if the circuit works properly within the microcomputer of the indoor unit. Error Decision Conditions The system cannot set the internal settings.
SiUS121827E Troubleshooting for RA Indoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Combination of the indoor and outdoor unit matched? NO Match the compatible models. YES Check the connection of connectors. (Refer to Note) OK? ∗ To secure the connection, disconnect the connectors once and then reconnect. YES Check the power supply voltage. NO Voltage as rated? NO Correct the power supply.
Troubleshooting for RA Indoor Unit 5.2 SiUS121827E Freeze-up Protection Control/Heating Peak-cut Control Error Code A5 Method of Error Detection Freeze-up protection control During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor.
SiUS121827E 5.3 Troubleshooting for RA Indoor Unit Indoor Fan Motor or Related Abnormality 5.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable Models FTXR09/12/18TVJUW(S) CTXG09/12/18QVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU FVXS09/12/15/18NVJU Error Code A6 Method of Error Detection The rotation speed detected by the Hall IC during indoor fan motor operation determines abnormal fan motor operation.
Troubleshooting for RA Indoor Unit SiUS121827E Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Turn off the power and rotate the fan by hand. Does the fan rotate smoothly? NO Replace the indoor fan motor. YES Turn on the power and start operation.
SiUS121827E Troubleshooting for RA Indoor Unit Note Reference Part 6 Service Diagnosis The rotation pulse is the feedback signal from the indoor fan motor. Check No.02 Refer to P.
Troubleshooting for RA Indoor Unit SiUS121827E 5.3.2 Indoor Fan Motor (AC Motor) or Related Abnormality Applicable Models FDXS09/12LVJU CDXS15/18/24LVJU Error Code A6 Method of Error Detection The rotation speed detected by the Hall IC during indoor fan motor operation determines abnormal fan motor operation. Error Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap.
SiUS121827E Troubleshooting for RA Indoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Start operation. YES Does the fan rotate? NO Check No. 04 Check Hall IC Turn off the power and rotate the fan by hand.
Troubleshooting for RA Indoor Unit 5.4 SiUS121827E Thermistor or Related Abnormality C4, C9 Error Code Method of Error Detection The temperatures detected by the thermistors determine thermistor errors. Error Decision Conditions 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.
SiUS121827E 5.5 Troubleshooting for RA Indoor Unit Front Panel Open/Close Fault Applicable Models FTXR09/12/18TVJUW(S), CTXG09/12/18QVJUW(S) Error Code C7 Error Decision Conditions If the error repeats, the system is shut down. Supposed Causes Defective reduction motor Malfunction or deterioration of the front panel mechanism Defective limit switch Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Troubleshooting for RA Indoor Unit 5.6 SiUS121827E Signal Transmission Error (Between Indoor Unit and Outdoor Unit) Error Code U4 Method of Error Detection The signal transmission data received from the outdoor unit is checked whether it is normal. Error Decision Conditions The data sent from the outdoor unit cannot be received normally, or the content of the data is abnormal.
SiUS121827E Troubleshooting for RA Indoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Check the connection wires between the indoor unit and the outdoor unit. Is there any wiring error? YES Correct the connection wires between the indoor unit and the outdoor unit.
Troubleshooting for RA Indoor Unit Reference 176 SiUS121827E Check No.11 Refer to P.
SiUS121827E 5.7 Troubleshooting for RA Indoor Unit Mismatching of Indoor Unit and Outdoor Unit Error Code UA Method of Error Detection The supply power is detected for its requirements (pair type is different from multi type) by the indoor/outdoor transmission signal. Error Decision Conditions The pair type and multi type are interconnected.
Troubleshooting for SA Indoor Unit SiUS121827E 6. Troubleshooting for SA Indoor Unit 6.1 Indoor Unit PCB Abnormality Error Code A1 Method of Error Detection The system checks the data from EEPROM. Error Decision Conditions When the data from the EEPROM is not received correctly EEPROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds its content without power.
SiUS121827E 6.2 Troubleshooting for SA Indoor Unit Drain Level Control System Abnormality Error Code A3 Method of Error Detection The float switch detects error.
Troubleshooting for SA Indoor Unit 6.3 SiUS121827E Indoor Fan Motor or Related Abnormality 6.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable Models FDMQ09/12/15/18/24RVJU Error Code A6 Method of Error Detection Detection from the current flow on the fan PCB Detection from the rotation speed of the fan motor in operation Error Decision Conditions The rotation speed is less than a certain level for 6 seconds.
SiUS121827E Troubleshooting for SA Indoor Unit A Continued from the previous page Turn ON the power supply while the fan motor connector (∗1) is disconnected. The HAP lamp on the indoor unit control PCB is blinking while the HAP lamp on the fan PCB is not blinking. YES NO Turn OFF the power supply and wait for 10 minutes. Turn OFF the power supply and wait for 10 minutes. Check No.02 Check the fan motor connectors. Each resistance between the pins is equal to or lower than 1 Ω.
Troubleshooting for SA Indoor Unit SiUS121827E 6.3.2 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable Models FFQ09/12/15/18Q2VJU Error Code A6 Method of Error Detection The rotation speed detected by the Hall IC during indoor fan motor operation determines abnormal fan motor operation. Error Decision Conditions The fan motor is not revved up.
SiUS121827E Troubleshooting for SA Indoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Turn off the power supply. (Unplug the power cable or turn the breaker off.) Check the connector for connection. OK? NO Correct the connection.
Troubleshooting for SA Indoor Unit Reference 184 SiUS121827E Check No.02 Refer to P.
SiUS121827E 6.4 Troubleshooting for SA Indoor Unit Indoor Fan PCB Abnormality Applicable Models Error Code FDMQ09/12/15/18/24RVJU A8 Method of Error Detection Microcomputer checks the voltage state of the fan PCB. Error Decision Conditions Overvoltage or voltage drop is detected on the fan PCB. Supposed Causes Defective fan PCB External factor such as noise Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Troubleshooting for SA Indoor Unit 6.5 SiUS121827E Humidifier or Related Abnormality Error Code AF Method of Error Detection Water leakage from humidifier(s) is detected based on the float switch ON/OFF changeover while the system is not operating.
SiUS121827E 6.6 Troubleshooting for SA Indoor Unit Thermistor or Related Abnormality C4, C5, C9 Error Code Method of Error Detection The temperatures detected by the thermistors determine thermistor errors. Error Decision Conditions The thermistor is disconnected or shorted while the unit is running. Supposed Causes Troubleshooting If the cause of the problem is related to the thermistors, the thermistors should be checked prior to changing the indoor unit PCB.
Troubleshooting for SA Indoor Unit 6.7 SiUS121827E Presence Sensor or Floor Sensor Abnormality Applicable Models FFQ09/12/15/18Q2VJU CE Error Code Method of Error Detection The system detects abnormality by the output signal from the sensor(s). Error Decision Conditions The sensor is disconnected or shorted while the unit is running.
SiUS121827E 6.8 Troubleshooting for SA Indoor Unit Remote Controller Thermistor Abnormality CJ Error Code Method of Error Detection 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 thermistor. Error Decision Conditions The remote controller thermistor is disconnected or shorted while the unit is running.
Troubleshooting for SA Indoor Unit 6.9 SiUS121827E Signal Transmission Error (Between Indoor and Outdoor Unit) Error Code U4 Method of Error Detection The signal transmission data from the outdoor unit is checked whether it is normal. Error Decision Conditions The data sent from the outdoor unit cannot be received normally, or the content of the data is abnormal.
SiUS121827E Troubleshooting for SA Indoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Check the connection wires between the indoor unit and the outdoor unit. Is there any wiring error? YES Correct the connection wires between the indoor unit and the outdoor unit.
Troubleshooting for SA Indoor Unit SiUS121827E 6.10 Signal Transmission Error (Between Indoor Unit and Remote Controller) Error Code U5 Method of Error Detection 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. Error Decision Conditions Normal transmission does not continue for specified period.
SiUS121827E Troubleshooting for SA Indoor Unit 6.11 Signal Transmission Error (Between MAIN/SUB Remote Controllers) Error Code U8 Method of Error Detection 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. Error Decision Conditions Normal transmission does not continue for specified period.
Troubleshooting for SA Indoor Unit SiUS121827E 6.
SiUS121827E Troubleshooting for Outdoor Unit 7. Troubleshooting for Outdoor Unit 7.1 Refrigerant Shortage Error Code U0 Outdoor Unit LED Display Aj1h2h3i4i5h Method of Error Detection 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 value. Error Decision Conditions The following conditions continue for 7 minutes.
Troubleshooting for Outdoor Unit SiUS121827E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Check the installation space. Check No. 17 Check the installation condition. NG Change the installation location or direction. Clean the outdoor heat exchanger. OK Check No. 19 Check the outdoor fan. NG Replace the outdoor fan motor. Reconnect the connector or fan motor lead wires.
SiUS121827E Troubleshooting for Outdoor Unit A Continued from the previous page Check No. 12 Electronic expansion valve functioning? NO Replace the electronic expansion valve. YES Change for a specified amount of fresh refrigerant. Refrigerant shortage error again? NO YES Check No. 01 Check the thermistors. NG Replace the defective thermistor(s). OK Replace the outdoor unit PCB (main PCB). Error again? YES Replace the compressor. NO Completed. Completed. R6000552 Reference Check No.
Troubleshooting for Outdoor Unit 7.2 SiUS121827E Low-voltage Detection or Over-voltage Detection Error Code U2 Outdoor Unit LED Display Aj1i2h3h4i5h Method of Error Detection Indoor Unit 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. Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit.
SiUS121827E Troubleshooting for Outdoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Check the connection of the compressor harness. Loose or disconnected? YES Reconnect the harness.
Troubleshooting for Outdoor Unit 7.3 SiUS121827E Wiring Error Check Unexecuted Error Code U3 Outdoor Unit LED Display Aj1h2i3h4h5h Method of Error Detection The system checks if wiring error check is executed after clearing the memory. Error Decision Conditions An error is determined when the unit is operated by the remote controller without executing wiring error check after the memory was cleared.
SiUS121827E 7.4 Troubleshooting for Outdoor Unit Unspecified Voltage (Between Indoor Unit and Outdoor Unit), Anti-icing Control in Other Rooms UA, UH Error Code Outdoor Unit LED Display Aj1h2h3h4h5h Method of Error Detection A wrong connection is detected by checking the combination of indoor and outdoor units on the microcomputer.
Troubleshooting for Outdoor Unit 7.5 SiUS121827E Anti-icing Control for Indoor Unit Error Code A5 Outdoor Unit LED Display Aj1i2h3i4i5h Method of Error Detection 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 room. Error Decision Conditions In cooling operation, the both conditions (A) and (B) are met for 5 minutes.
SiUS121827E Troubleshooting for Outdoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the wiring and piping. Wrong wiring or piping? YES Activate the wiring error check function. NO Check No. 12 Check the electronic expansion valve. NO Replace the electronic expansion valve or coil. Functioning? YES Check No. 01 Check the outdoor heat exchanger thermistor.
Troubleshooting for Outdoor Unit 7.6 SiUS121827E Outdoor Unit PCB Abnormality Error Code E1 Outdoor Unit LED Display Aj1i2i3i4h5h Method of Error Detection Detect within the program of the microcomputer. Error Decision Conditions The program of the microcomputer is in abnormal running order.
SiUS121827E 7.7 Troubleshooting for Outdoor Unit OL Activation (Compressor Overload) Error Code E5 Outdoor Unit LED Display Aj1i2h3i4h5h Method of Error Detection A compressor overload is detected through compressor OL. Error Decision Conditions If the error repeats, the system is shut down.
Troubleshooting for Outdoor Unit SiUS121827E Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Discharge pipe thermistor disconnected? YES Insert the thermistor in position. NO Check No. 01 Check the discharge pipe thermistor. NG Replace the discharge pipe thermistor. OK Is the connector S40 properly connected? NO Connect the connector S40 properly. YES Disconnect the connector S40 from the PCB.
SiUS121827E Troubleshooting for Outdoor Unit Reference Check No.13 Refer to P.237 Reference Check No.14 Refer to P.
Troubleshooting for Outdoor Unit 7.8 SiUS121827E Compressor Lock Error Code E6 Outdoor Unit LED Display Aj1h2i3i4h5h Method of Error Detection A compressor lock is detected by checking the compressor running condition through the position detection circuit. Error Decision Conditions Judging from the current waveform generated when high-frequency voltage is applied to the compressor. If the error repeats, the system is shut down.
SiUS121827E Troubleshooting for Outdoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. (Precaution before turning on the power again) Make sure the power has been off for at least 30 seconds. Stop valve closed? YES Open the stop valve. NO Turn off the power. Disconnect the harnesses U, V, and W. Check No.15 Check with the inverter analyzer.
Troubleshooting for Outdoor Unit 7.9 SiUS121827E DC Fan Lock Error Code E7 Outdoor Unit LED Display Aj1i2i3i4i5h Method of Error Detection An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Error Decision Conditions The fan does not start in 30 seconds even when the fan motor is running. If the error repeats, the system is shut down.
SiUS121827E Troubleshooting for Outdoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Fan motor connector disconnected? YES Turn off the power and reconnect the connector. NO Foreign matters in or around the fan? YES Remove the foreign matters. NO Turn on the power. Rotate the fan. Fan rotates smoothly? NO Replace the outdoor fan motor. YES Check No.
Troubleshooting for Outdoor Unit SiUS121827E 7.10 Input Overcurrent Detection Error Code E8 Outdoor Unit LED Display Aj1h2i3h4i5h Method of Error Detection Detected by checking the input current value Error Decision Conditions 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. Supposed Causes 212 Outdoor temperature is out of operation range.
SiUS121827E Troubleshooting for Outdoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. ∗ An input overcurrent may result from wrong internal wiring. If the system is interrupted by an input overcurrent after the wires have been disconnected and reconnected for part replacement, check the Check No. 17 Check the installation condition. Start operation and measure the input current.
Troubleshooting for Outdoor Unit SiUS121827E 7.11 Four Way Valve Abnormality Error Code EA Outdoor Unit LED Display Aj1i2h3h4h5h Method of Error Detection 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. Error Decision Conditions The following condition continues for A seconds after the compressor has started.
SiUS121827E Troubleshooting for Outdoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Four way valve coil disconnected (loose)? YES Correct the four way valve coil. NO Harness disconnected? YES Reconnect the harness. NO Check the continuity of the four way valve coil and harness. Disconnect the harness from the connector. Resistance between harnesses about 1000 ~ 2000 Ω? NO Replace the four way valve coil.
Troubleshooting for Outdoor Unit SiUS121827E 7.12 Discharge Pipe Temperature Control Error Code F3 Outdoor Unit LED Display Aj1i2h3i4h5h Method of Error Detection An error is determined with the temperature detected by the discharge pipe thermistor. Error Decision Conditions If the temperature detected by the discharge pipe thermistor rises above A, the compressor stops. The error is cleared when the discharge pipe temperature is dropped below B. A 120°C (248°F) B 107°C (224.
SiUS121827E Troubleshooting for Outdoor Unit 7.13 High Pressure Control in Cooling Error Code F6 Outdoor Unit LED Display Aj1i2h3i4i5h Method of Error Detection 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. Error Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rises above about 62.5°C (144.5°F).
Troubleshooting for Outdoor Unit SiUS121827E Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the installation space. Check No. 17 Check the installation condition. NG OK Check No. 19 Check the outdoor fan. NG OK Check No. 18 Check the discharge pressure. NG Change the installation location or direction. Clean the outdoor heat exchanger. Replace the outdoor fan motor.
SiUS121827E Troubleshooting for Outdoor Unit 7.14 Compressor Sensor System Abnormality Error Code H0 Outdoor Unit LED Display Aj1i2i3h4h5h Method of Error Detection 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.
Troubleshooting for Outdoor Unit SiUS121827E Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn off the power. Check the connection of the reactor. Connection OK? NO Connect the reactor properly. YES Check the connection of the compressor. Connection OK? NO Connect the compressor properly. YES Check the reactor.
SiUS121827E Troubleshooting for Outdoor Unit 7.15 Position Sensor Abnormality Error Code H6 Outdoor Unit LED Display Aj1i2i3h4h5h Method of Error Detection A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit. Error Decision Conditions If the error repeats, the system is shut down.
Troubleshooting for Outdoor Unit SiUS121827E Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn on the power. Check the electrolytic capacitor voltage. + 100 Within 320 - 50 VDC? NO Replace the outdoor unit PCB (main PCB). YES Turn off the power. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Check No.
SiUS121827E Troubleshooting for Outdoor Unit Reference Check No.15 Refer to P.238 Reference Check No.18 Refer to P.241 Reference Check No.20 Refer to P.
Troubleshooting for Outdoor Unit SiUS121827E 7.16 Thermistor or Related Abnormality (Outdoor Unit) Error Code H9, J3, J6, J8, J9, P4 Outdoor Unit LED Display Aj1i2i3h4h5h Method of Error Detection 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. Error Decision Conditions The voltage between the both ends of the thermistor is above 4.96 V or below 0.04 V with the power on.
SiUS121827E Troubleshooting Troubleshooting for Outdoor Unit In case of H9, J3, J6, J8, J9 Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn on the power again. Error displayed again on remote controller? NO Reconnect the connectors or thermistors. YES Check No. 01 Check the thermistor resistance value. Normal? NO Replace the defective thermistor(s).
Troubleshooting for Outdoor Unit SiUS121827E 7.17 Electrical Box Temperature Rise Error Code L3 Outdoor Unit LED Display Aj1i2i3h4i5h Method of Error Detection An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off. Error Decision Conditions With the compressor off, the radiation fin temperature is above A. The error is cleared when the temperature drops below B.
SiUS121827E Troubleshooting for Outdoor Unit 7.18 Radiation Fin Temperature Rise Error Code L4 Outdoor Unit LED Display Aj1h2h3h4i5h Method of Error Detection A radiation fin temperature rise is detected by checking the radiation fin temperature with the compressor on. Error Decision Conditions The radiation fin temperature with the compressor on is above A. The error is cleared when the temperature drops below B. If the error repeats, the system is shut down.
Troubleshooting for Outdoor Unit SiUS121827E Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn off the power. Then, turn on the power to restart the system. Error displayed again? YES NO Has the PCB been replaced? YES Check if silicone grease is applied properly on the radiation fin. If not, apply the silicone grease. NO Check the radiation fin temperature. NO Above A? Replace the outdoor unit PCB (main PCB).
SiUS121827E Troubleshooting for Outdoor Unit 7.19 Output Overcurrent Detection Error Code L5 Outdoor Unit LED Display Aj1h2h3i4h5h Method of Error Detection An output overcurrent is detected by checking the current that flows in the inverter DC section. Error Decision Conditions A position signal error occurs while the compressor is running. A rotation speed error occurs while the compressor is running.
Troubleshooting for Outdoor Unit SiUS121827E Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. ∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again. Check No. 17 Check the installation condition. Stop valve fully open? NO Fully open the stop valve.
SiUS121827E Troubleshooting for Outdoor Unit Reference Check No.17 Refer to P.240 Reference Check No.18 Refer to P.241 Reference Check No.22 Refer to P.
Check SiUS121827E 8. Check 8.1 Thermistor Resistance Check Check No.01 Measure the resistance of each thermistor using multimeter. The resistance values are defined by below table. If the measured resistance value does not match the listed value, the thermistor must be replaced. Disconnect the connector of thermistor ASSY from the PCB to measure the resistance between the pins using multimeter.
SiUS121827E 8.2 Check Indoor Fan Motor Connector Check Check No.02 FTXR, CTXG, CTXS, FTXS, FVXS Series 1. Check the connection of connector. 2. Check motor power supply voltage output (pins 4 - 7). 3. Check motor control voltage (pins 4 - 3). 4. Check rotation command voltage output (pins 4 - 2). 5. Check rotation pulse input (pins 4 - 1).
Check SiUS121827E FFQ Series 1. Check the connection of connector. 2. Check motor power supply voltage output (pins 5 - 8). 3. Check motor control voltage (pins 5 - 4). 4. Check rotation command voltage output (pins 5 - 3). X20A Motor power supply voltage (290 ~ 330 VDC) Unused Unused GND Motor control voltage (15 VDC) Rotation command voltage (0 ~ 5 VDC) Rotation pulse input Unused (R24373) 8 7 6 5 4 3 2 1 8.3 Hall IC Check Check No.04 FDXS, CDXS Series 1. Check the connector connection. 2.
SiUS121827E 8.4 Check Power Supply Waveform Check Check No.11 Measure the power supply waveform between No. 1 and No. 2 on the terminal strip, and check the waveform disturbance. Check if the power supply waveform is a sine wave (Fig.1). Check if there is waveform disturbance near the zero-cross (sections circled in Fig.2). [Fig.1] [Fig.
Check 8.5 SiUS121827E Electronic Expansion Valve Check Check No.12 Conduct the followings to check the electronic expansion valve (EV). 1. Check if the EV connector is correctly inserted in the PCB. Match the EV unit number and the connector number. 2. Turn the power off and on again, and check if all the EVs generate latching sound. 3. If any of the EVs does not generate latching sound in the above step 2, disconnect that connector and check the continuity using a multimeter.
SiUS121827E 8.6 Check Four Way Valve Performance Check Check No.13 Turn off the power. Then, turn on the power to restart the system. Start heating operation. S80 voltage at 208 - 230 VAC with compressor on? (Fig. 1) ∗ Four way valve coil Cooling/Dry/Defrost: Not energized Heating: energized NO Replace the outdoor unit PCB (main PCB). YES Disconnect the four way valve coil from the connector and check the continuity.
Check 8.8 SiUS121827E Inverter Analyzer Check Check No.15 Characteristics Inverter analyzer: RSUK0917C If an abnormal stop occurs due to compressor startup failure or overcurrent output when using an inverter unit, it is difficult to judge whether the stop is caused by the compressor failure or some other failure (main PCB, power module, etc.). The inverter analyzer makes it possible to judge the cause of trouble easily and securely.
SiUS121827E Check 1. If all the LEDs are lit uniformly, the compressor is defective. → Replace the compressor. 2. If the LEDs are not lit uniformly, check the power module. → Refer to Check No.22. 3. If NG in Check No.22, replace the power module. (Replace the main PCB. The power module (IPM1) is united with the main PCB.) If OK in Check No.22, check if there is any solder cracking on the PCB. 4. If any solder cracking is found, replace the PCB or repair the soldered section.
Check 8.9 SiUS121827E Rotation Pulse Check on the Outdoor Unit PCB Check No.16 Manually rotate the outdoor fan motor and check if 4 pulses of sinusoidal voltage are detected between pins 1-2 and then pins 2-3. S70 3 U (red) 2 V (white) 1 W (black) R6000524 8.10 Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air suction and discharge area. NG Change the installation location or direction.
SiUS121827E Check 8.11 Discharge Pressure Check Check No.18 Discharge pressure check High? NO Replace the compressor. YES Is the stop valve open? NO Open the stop valve. YES Is the connection pipe deformed? YES Replace the pipe installed at the site. NO Is the air filter or indoor/outdoor heat exchanger dirty? NO Replace the compressor. YES Clean the dirty air filter or indoor/outdoor heat exchanger. (R21121) 8.12 Outdoor Fan System Check Check No.19 DC motor Check the outdoor fan system.
Check SiUS121827E 8.13 Main Circuit Short Check Check No.20 Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is about 0 V before checking Measure the resistance between the pins of the DB1 referring to the table below. If the resistance is ∞ or less than 1 kΩ, short circuit occurs on the main circuit. Positive terminal (+) of digital multimeter Negative terminal (–) of digital multimeter Resistance is OK. Resistance is NG.
SiUS121827E Check Front side Rear side Multimeter – + – ~ ~ + 4 3 2 1 R6000583 Part 6 Service Diagnosis 243
Check SiUS121827E 8.14 Capacitor Voltage Check Check No.21 Before this check, be sure to check the main circuit for short circuit. With the circuit breaker still on, measure the voltage according to the drawing of the model in question. Be careful never to touch any live parts. Multimeter (DC, voltage) R6000525 To prevent an electrical shock, use a multimeter to check that the voltage between DC + and DC – is 50 V or less.
SiUS121827E Check 8.15 Power Module Check Check No.22 Check to make sure that the voltage between (+) and (–) of the power module is about 0 V before checking. Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector. Follow the procedure below to measure resistance between the (+) or (–) terminal of the power module and the U, V, or W terminal of the compressor with a multimeter.
SiUS121827E Part 7 Trial Operation and Field Settings 1. 2. 3. 4. Pump Down Operation............................................................................247 Forced Cooling Operation .......................................................................248 Wiring Error Check Function ...................................................................249 Trial Operation ........................................................................................251 4.1 RA Indoor Unit....................
SiUS121827E Pump Down Operation 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing of the unit. Details 1. 2. 3. 4. 5. Remove the valve caps from the liquid stop valve and the gas stop valve. Carry out forced cooling operation. After 1 - 2 minutes, close the liquid stop valve with a hexagonal wrench. After 3 - 4 minutes, close the gas stop valve and stop the forced cooling operation.
Forced Cooling Operation SiUS121827E 2. Forced Cooling Operation Outline The forced cooling operation is allowed when both the following conditions are met. 1. The outdoor unit is not abnormal and not in the 3-minute standby mode. 2. The outdoor unit is not operating. Protection functions have priority over all other functions during forced cooling operation. Procedure 1. 2. 3. 4. 5. 6. 7. 8. 9. Turn off the power. Remove the right side panel (6 screws) and the shield cover (2 screws).
SiUS121827E Wiring Error Check Function 3. Wiring Error Check Function Outline Wiring error check function is designed for the microcomputer to correct wiring errors itself. If local wiring is unclear in the case of buried piping, for example, just press the wiring error check switch on the outdoor unit. Even if the connections for Room A and Room B are confused, the system may run without a hassle. Note that this check function does not work in the following cases.
Wiring Error Check Function Details SiUS121827E Wiring error check is realized by feeding refrigerant one by one through each piping port and detecting indoor heat exchanger temperature with the indoor heat exchanger thermistor in each room to see if the temperature changes in correct order. During wiring error check, freezing (cracking) noise may be heard from the indoor unit. This is not a malfunction.
SiUS121827E Trial Operation 4. Trial Operation 4.1 RA Indoor Unit Outline Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts, such as flap movement, are working properly. Trial operation should be carried out in either cooling or heating operation. Procedure 1. Measure the power supply voltage and make sure that it falls within the specified range. 2.
Trial Operation SiUS121827E ARC466 Series 1. Press On/Off button to turn on the system. 2. Press the center of Temp button and Mode button at the same time. 3. Select T (trial operation) with Tempor Tempbutton. 4. Press Mode button to start the trial operation. 5. Press Mode button and select operation mode. 6. Trial operation terminates in about 30 minutes and switches into normal mode. To quit trial operation, press On/Off button.
SiUS121827E 4.2 Trial Operation SA Indoor Unit Outline Make sure to install the decoration panel before carrying out trial operation if the wireless remote controller is used (FFQ series only). Trial operation should be carried out in either cooling or heating operation. 1. Measure the supply voltage and make sure that it is within the specified range. 2. In cooling operation, select the lowest programmable temperature; in heating operation, select the highest programmable temperature. 3.
Trial Operation SiUS121827E With BRC1E73 Wired Remote Controller 1. Set to COOL or HEAT operation using the remote controller. Basic screen 1. 2. 2. Press and hold Cancel button for 4 seconds or longer. Service settings menu is displayed. Cool Set to 68 F 3. In the case of a model having airflow direction function, select Test Operation 3. in the service settings menu, and press Menu/OK button. Basic screen returns and “Test Operation” is displayed at the bottom.
SiUS121827E Trial Operation With BRC082A43, BRC082A41W, BRC082A42W(S) Wireless Remote Controller 1. Press button and select the COOL or HEAT operation. 2. Press button twice. “TEST” is displayed. 3. Press button within 10 seconds, and the test operation starts. Monitor the operation of the indoor unit for a minimum of 10 minutes. During test operation, the indoor unit will continue to cool/heat regardless of the temperature setpoint and room temperature.
Field Settings SiUS121827E 5. Field Settings 5.1 RA Indoor Unit 5.1.1 Model Type Settings ARC452A21, ARC452A23 The remote controller is common to the heat pump model and cooling only model. Make sure the DIP switch is set to the left side. The heating operation will not be available when the DIP switch is set to the right side. Heat pump model Cooling only model DIP switch DIP switch (R18201) ARC466A21, ARC466A36 The remote controller is common to the heat pump model and cooling only model.
SiUS121827E Field Settings 5.1.2 Temperature Display Switch You can select Fahrenheit or Celsius for temperature display. ARC452A21, ARC452A23 Press TEMPand TEMPbuttons 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.
Field Settings SiUS121827E 5.1.3 When 2 Units are Installed in 1 Room Outline When 2 indoor units are installed in 1 room, 1 of the 2 indoor units and the corresponding wireless remote controller can be set for different address. Both the indoor unit PCB and the wireless remote controller need alteration. The method of address setting varies depending on the type of indoor unit and the series of wired remote controller.
SiUS121827E FDXS, CDXS Series Field Settings Cut the jumper JA on PCB. 1 2 3 ADDRESS : JA EXIST 1 2 CUT JA (R22010) Caution FVXS Series Replace the PCB if you cut a jumper unintentionally. Jumpers are necessary for electronic circuit. Improper operation may occur if you cut any of them. 1. 2. 3. 4. 5. 6. 7. Remove the front grille. Lift the sensor PCB fixing plate and remove the front shield plate. Disconnect the connectors S1, S41, S42. Remove the electric box (1 screw).
Field Settings Caution Wireless Remote Controller SiUS121827E Replace the PCB if you cut a jumper unintentionally. Jumpers are necessary for electronic circuit. Improper operation may occur if you cut any of them. 1. Remove the cover and take it off. 2. Cut the address setting jumper. ARC452 series ARC466 series Jumper Jumper ADDRESS EXIST 1 CUT 2 Caution 260 (R12065) ADDRESS EXIST 1 CUT 2 ∗ Do not cut the left jumper. (R18416) Replace the remote controller if you cut a jumper unintentionally.
SiUS121827E Field Settings 5.1.4 Jumper and Switch Settings FTXR series Jumper on indoor unit PCB JB JC Function Fan speed setting when compressor stops for thermostat OFF. (effective only at cooling operation) Power failure recovery function When connected (factory setting) When cut The fan stops. Fan speed setting; Remote controller setting Auto-restart The unit does not resume operation after recovering from a power failure. Timer settings are cleared.
Field Settings 5.2 SiUS121827E SA Indoor Unit 5.2.1 How to Change the Field Settings Outline If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed. Refer to the instruction manual for each optional accessory. Note Procedure When using 2 remote controllers for 1 indoor unit, change the field settings from MAIN remote controller. Note that the field settings can not be set from SUB remote controller. BRC1E73 Wired Remote Controller d a Unit No.
SiUS121827E Field Settings 3. Highlight the mode, and select desired “Mode No.” by using (Up/Down) button. 4. In the case of setting per indoor unit during group control (When Mode No. such as 20 , 22 , 23 , 25 are selected), highlight the unit No.and select “Indoor unit No.” to be set by using (Up/Down) button. (In the case of group setting, this operation is not needed.) In the case of individual setting per indoor unit, current settings are displayed. And, SECOND CODE NO. “ - ” means no function. 5.
Field Settings SiUS121827E BRC082A43, BRC082A41W, BRC082A42W(S) Wireless Remote Controller Mode No. Field setting mode First code No. UP button DOWN button RESERVE button MODE button Second code No. INSPECTION/TEST button (R24061) To set the field settings, you have to change: Mode No. First code No. Second code No. 1. When in normal mode, hold down /TEST button for at least 4 seconds to enter the Field Set mode. 2. Select the desired Mode No. with MODE button. 3.
SiUS121827E Field Settings 5.2.2 Overview of Field Settings for FFQ Series First Mode Code No. No.
Field Settings SiUS121827E 5.2.3 Overview of Field Settings for FDMQ Series 3 11 (21) 7 13 (23) 6 Filter cleaning sign interval (used to change filter cleaning display interval according to filter contamination) Longlife filter Standard filter 01 Filter cleaning sign (used to set filter cleaning display ON/ OFF) 03 04 05 06 — — — — Approx. 100 hrs.
SiUS121827E Field Settings 5.2.4 MAIN/SUB Setting when Using 2 Wired Remote Controllers Outline The MAIN/SUB setting is necessary when 1 indoor unit is controlled by 2 remote controllers. When you use 2 remote controllers, set one to MAIN and the other to SUB. Details 1. The following message is displayed after power-on. Checking the connection. Please stand by. When the above message is displayed, the backlight will not be ON.
Field Settings SiUS121827E 5.2.5 MAIN/SUB and Address Setting for Wireless Remote Controller for FDMQ Series Outline If setting multiple wireless remote controllers to operate in one room, perform address setting for the receiver and the wireless remote controller. If using both a wired remote controller and a wireless remote controller with 1 indoor unit, change the MAIN/SUB switch of the signal receiver PCB.
SiUS121827E Wireless Remote Controller Address Field Settings Factory set is 1. Change the wireless remote controller address setting by the following steps, if necessary. 1. Hold down button and /TEST button at the same time for at least 4 seconds to enter the field setting mode. (SETTING is indicated on the display). 2. Press FAN button and select display setting ( or ). Each time the button is pressed, the display switches between and . 3. Press button and button to set the address.
Field Settings Multiple Settings or SiUS121827E When the indoor unit is controlled by an outside controller (central remote controller, etc.), the indoor unit sometimes does not respond to ON/OFF command or temperature setting command from the wireless remote controller. Check what setting the customer needs and make the multiple setting as shown below. Remote Controller Multiple settings Remote controller display : Standard All items displayed.
SiUS121827E Field Settings 5.2.6 MAIN/SUB and Address Setting for Wireless Remote Controller for FFQ Series Outline Transmitter Board 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.
Field Settings Wireless Remote Controller Address SiUS121827E Factory set is 1. Change the wireless remote controller address setting by the following steps, if necessary. 1. Hold down button and /TEST button at the same time for at least 4 seconds to enter the field setting mode. (SETTING is indicated on the display). Press FAN button and select display setting ( or ). Each time the button is pressed, the display switches between and . 2. Press button and button to set the address.
SiUS121827E Multiple Settings or Field Settings When the indoor unit is controlled by an outside controller (central remote controller, etc.), the indoor unit sometimes does not respond to ON/OFF command or temperature setting command from the wireless remote controller. Check what setting the customer needs and make the multiple setting as shown below. Remote Controller Multiple settings Remote controller display : Standard All items displayed.
Field Settings 5.3 SiUS121827E Outdoor Unit 5.3.1 Priority Room Setting Outline The indoor unit for which priority room setting is applied takes priority in the following cases. Operation mode priority The operation mode of the prioritized room takes precedence. For example, when the prioritized indoor unit starts cooling operation, the other indoor units which have been in heating operation enter the standby mode. Heating operation will resume if the prioritized indoor unit stops cooling operation.
SiUS121827E Field Settings 5.3.2 COOL/HEAT Mode Lock Use the S15 connector to set the unit to cooling only or heating only. Setting to heating only (H): short-circuit the pins 1 and 3 of the connector S15. Setting to cooling only (C): short-circuit the pins 3 and 5 of the connector S15. The following specifications apply to the connector housing and pins.
Field Settings SiUS121827E 5.3.3 NIGHT QUIET Mode Outline If NIGHT QUIET mode is to be used, initial settings must be made when the unit is installed. Explain the function of NIGHT QUIET mode, as described below, to the customer, and confirm whether or not the customer wants to use NIGHT QUIET mode. NIGHT QUIET mode function reduces operating noise of the outdoor unit at nighttime. This function is useful if the customer is worried about the effects of the operating noise on the neighbors.
SiUS121827E Silicone Grease on Power Transistor/Diode Bridge 6. Silicone Grease on Power Transistor/Diode Bridge Outline Apply the specified silicone grease to the heat radiation part of a power transistor/diode bridge when you replace an outdoor unit PCB. The silicone grease encourages the heat radiation of a power transistor/diode bridge. Details 1. Wipe off the old silicone grease on the refrigerant pipe completely. 2. Apply the silicone grease on the heat sink evenly.
SiUS121827E Part 8 Appendix 1. Piping Diagrams......................................................................................279 1.1 Indoor Unit................................................................................................ 279 1.2 Outdoor Unit ............................................................................................. 282 2. Wiring Diagrams......................................................................................283 2.1 Indoor Unit....................
SiUS121827E Piping Diagrams 1. Piping Diagrams 1.
Piping Diagrams SiUS121827E FTXS24LVJU FDXS09/12LVJU INDOOR UNIT INDOOR UNIT 5/16 CuT (1/4CuT) DISTRIBUTOR HEAT EXCHANGER THERMISTOR ON HEAT EXCH. THERMISTOR ON HEAT EXCH.
SiUS121827E Piping Diagrams FVXS09/12NVJU FVXS15/18NVJU INDOOR UNIT INDOOR UNIT MUFFLER ASSY 9/32 CuT 1/4 CuT 1/4 CuT THERMISTOR TURBO FAN FAN MOTOR FIELD PIPING (3/8 CuT) HEAT EXCHANGER 1/4 CuT 1/4 CuT 1/4 CuT 1/4 CuT M FIELD PIPING (1/4 CuT) MUFFLER ASSY 9/32 CuT HEAT EXCHANGER 1/4 CuT THERMISTOR ON HEAT EXCH.
Piping Diagrams 1.
SiUS121827E Wiring Diagrams 2. Wiring Diagrams 2.
Wiring Diagrams SiUS121827E CTXS07LVJU, FTXS09/12LVJU 1 PCB3 S49 LED1 H1P 1 PCB1 S46 1 BLK BLK ~ BLK V1 - BLK H1 3.15A C102 BLK LED2 H2P X1M FU1 F1U MR10 H2 2 RED 3 3 BLK 9 TRANSMISSION CIRCUIT 9 BLK GRN/YLW H3 CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
SiUS121827E Wiring Diagrams FTXS15/18/24LVJU WIRING DIAGRAM 1 PCB3 S49 1 LED1 H1P LED2 H2P LED3 H3P 9 PCB1 S46 1 BLK BLK BLK BLK BLK BLK BLK BLK BLK H1 3.15A ~ C102 V1 - MR10 H2 H3 TRANSMISSION CIRCUIT 9 FU2 F2U HA RTH1 R1T 7 S1 3.15A 4 S25 1 BLK BLK S48 1 3 S32 S41 2 16 8 10 12 14 2 5 3 4 6 15 13 11 9 7 1 BLK 1 1 PCB2 WIRELESS REMOTE CONTROLLER S47 3 4 INTELLIGENT EYE SENSOR RED 3 3 OUTDOOR FIELD WIRING.
Wiring Diagrams SiUS121827E FDXS09/12LVJU, CDXS15/18/24LVJU A1P H1 A2P F1U 3.
SiUS121827E Wiring Diagrams FVXS09/12/15/18NVJU PCB2 PCB3 S27 S2W(4) S26 V1 F1U ~RECTIFIER~ H1 BLK WHT RED 3.15A H2 S4W GRN GRN/YLW MR10 WIRELESS REMOTE CONTROLLER PCB4 S1W LED1 LED2 H1P H2P S47 S46 F2U 3.15A E1 S1 7 4 1 M1S M2S INDOOR M RED ORG YLW PNK BLU M RED ORG YLW PNK BLU S42 1 S21 E3 BLU BRN ORG WHT M HA M1F t° S48 S49 R1T 6 S41 1 PCB1 S32 5 CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
Wiring Diagrams SiUS121827E FDMQ09/12/15/18/24RVJU 3D112629A Note 288 A1P: Control PCB A2P: Indoor fan PCB Refer to page 47 for Printed Circuit Board Connector Wiring Diagram.
SiUS121827E Wiring Diagrams FFQ09/12/15/18Q2VJU WIRING DIAGRAM WIRELESS REMOTE CONTROLLER (RECEIVER/DISPLAY UNIT) (OPTIONAL ACCESSORY) GRN OUTDOOR BLK WHT RED PNK WHT YLW ORG BLU BLK INDOOR UNIT PRINTED CIRCUIT BOARD CAPACITOR (M1F) DIP SWITCH ON PCB FUSE (F, 5A, 250V) FLASHING LAMP (SERVICE MONITOR GREEN) CENTRAL REMOTE K2R MAGNETIC RELAY CONTROLLER M1F FAN MOTOR (NOTE 2) M1P DRAIN PUMP MOTOR WIRED REMOTE CONTROLLER (OPTIONAL ACCESSORY) (NOTE 3) GRN/YLW NORM. EMG.
Outdoor Unit SiUS121827E 3. Outdoor Unit 5MXS48TVJU 3D118022 Note(s) 290 PCB1: Main PCB PCB2: Service monitor PCB Refer to page 54 for Printed Circuit Board Connector Wiring Diagram.
SiUS121827E Outdoor Unit 4MXL36TVJU 3D118060 Note(s) Part 8 Appendix PCB1: Main PCB PCB2: Service monitor PCB Refer to page 54 for Printed Circuit Board Connector Wiring Diagram.
Operation Limit SiUS121827E 4.
zz Daikin products are manufactured for export to numerous countries throughout the world. Prior to purchase, please confirm with your local authorized importer, distributor and/or retailer whether this product conforms to the applicable standards, and is suitable for use, in the region where the product will be used. This statement does not purport to exclude, restrict or modify the application of any local legislation. zz Ask a qualified installer or contractor to install this product.
