SiUS181631EA Service Manual Multi-Split Type Air Conditioners RMXS-L Series [Applied Models] ● Inverter Multi : Heat Pump
SiUS181631EA Multi-Split Type Air Conditioners RMXS-L Series zHeat Pump Outdoor Unit RMXS48LVJU Branch Provider (BP) Unit BPMKS048A2U BPMKS049A3U Indoor Unit CTXG09QVJUW CTXG09QVJUS CTXG12QVJUW CTXG12QVJUS CTXG18QVJUW CTXG18QVJUS FDXS09LVJU FDXS12LVJU CDXS15LVJU CDXS18LVJU CDXS24LVJU FVXS09NVJU FVXS12NVJU FVXS15NVJU FVXS18NVJU FFQ09Q2VJU FFQ12Q2VJU FFQ15Q2VJU FFQ18Q2VJU CTXS07JVJU CTXS09HVJU CTXS12HVJU CTXS07LVJU FTXS09LVJU FTXS12LVJU FTXS15LVJU FTXS18LVJU FTXS24LVJU i Table of Contents
SiUS181631EA 1. Introduction ............................................................................................... vii 1.1 Safety Considerations ................................................................................. vii 1.2 Icons Used ...................................................................................................ix 1.3 Legends........................................................................................................ix Part 1 List of Functions .........
SiUS181631EA Part 5 Functions and Control......................................................... 50 1. Operation Mode ........................................................................................52 2. Basic Control.............................................................................................53 2.1 2.2 2.3 2.4 Normal Operation ....................................................................................... 53 Compressor PI Control..........................................
SiUS181631EA 8. FFQ Series Function .................................................................................98 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 8.10 8.11 Temperature Control .................................................................................. 98 Airflow Direction Control............................................................................. 99 Fan Speed Control for Indoor Unit ............................................................. 99 Program Dry Operation ...........
SiUS181631EA 3. Error Codes and Description...................................................................194 4. Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series............................................................................................ 196 4.1 4.2 4.3 4.4 4.5 4.6 Indoor Unit PCB Abnormality ................................................................... 196 Freeze-up Protection Control/Heating Peak-cut Control ..........................
SiUS181631EA 7.17 7.18 7.19 7.20 7.21 7.22 7.23 7.24 7.25 7.26 7.27 7.28 7.29 7.30 7.31 7.32 7.33 Outdoor Unit PCB Abnormality................................................................. 245 Radiation Fin Temperature Rise .............................................................. 246 Inverter Compressor Abnormality............................................................. 247 Inverter Current Abnormality ....................................................................
Introduction SiUS181631EA 1. Introduction 1.1 Safety Considerations Read these SAFETY CONSIDERATIONS carefully before performing any repair work. Comply with these safety symbols without fail. Meanings of DANGER, WARNING, CAUTION, and NOTE Symbols: DANGER .............. Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. WARNING ............ Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
SiUS181631EA • When relocating the equipment, check if the new installation site has sufficient strength to withstand the weight of the equipment. If the installation site does not have sufficient strength and the equipment is not properly secured, the equipment may fall and result in injury. • When relocating the system, keep the refrigerant circuit free from substances other than the specified refrigerant (R-410A) such as air.
Introduction 1.2 SiUS181631EA Icons Used The following icons are used to attract the attention of the reader to specific information. Icon Type of Information Description Warning A Warning is used when there is danger of personal injury. Caution A 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.
SiUS181631EA Part 1 List of Functions 1. Functions..................................................................................................... 2 1.1 Outdoor Unit ................................................................................................. 2 1.2 Indoor Unit....................................................................................................
Functions SiUS181631EA 1. Functions Category Basic Functions Functions Inverter (with inverter power control) Operation limit for cooling Operation limit for heating PAM control Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience z Category Functions Air-purifying filter — Air-purifying filter with photocatalytic deodorizing function — — Titanium apatite deodorizing filter — — Refer to P. 287 Health & Cleanliness RMXS48LVJU Outdoor Unit RMXS48LVJU 1.
SiUS181631EA Category Basic Functions Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience Functions Inverter (with inverter power control) z Operation limit for cooling — Operation limit for heating — Category Health & Cleanliness Functions CTXG09/12/18QVJUW(S) Indoor Unit CTXG09/12/18QVJUW(S) 1.
Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience Inverter (with inverter power control) z z Operation limit for cooling — — Operation limit for heating — — CTXS07LVJU FTXS09/12LVJU Basic Functions Functions CTXS07JVJU CTXS09/12HVJU Category CTXS07LVJU FTXS09/12LVJU SiUS181631EA CTXS07JVJU CTXS09/12HVJU Functions Air-purifying filter — — Air-purifying filter with photocatalytic deodorizing function z — Category Health & Cleanliness Functions PAM c
Basic Functions Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience Functions Inverter (with inverter power control) z Operation limit for cooling — Operation limit for heating — Category Health & Cleanliness Functions FTXS15/18/24LVJU Category Functions FTXS15/18/24LVJU SiUS181631EA Air-purifying filter — Air-purifying filter with photocatalytic deodorizing function — PAM control — Titanium apatite deodorizing filter z Oval scroll compressor — Longl
Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience Inverter (with inverter power control) z z Operation limit for cooling — — Operation limit for heating — — CDXS15/18/24LVJU Basic Functions Functions FDXS09/12LVJU Category CDXS15/18/24LVJU SiUS181631EA FDXS09/12LVJU Functions Air-purifying filter — — Air-purifying filter with photocatalytic deodorizing function — — Category Health & Cleanliness Functions PAM control — — Titanium apatite deodori
Basic Functions Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience Functions Inverter (with inverter power control) z Operation limit for cooling — Operation limit for heating — Category Health & Cleanliness Functions FVXS09/12/15/18NVJU Category Functions FVXS09/12/15/18NVJU SiUS181631EA Air-purifying filter — Air-purifying filter with photocatalytic deodorizing function — PAM control — Titanium apatite deodorizing filter z Oval scroll compressor —
Compressor Comfortable Airflow — — — — — Operation limit for heating — Category Health & Cleanliness Functions PAM control — — Titanium apatite deodorizing filter — Standby electricity saving — — Longlife filter z z Oval scroll compressor — — Air filter — — Swing compressor — — Filter cleaning indicator z z — Rotary compressor — — Wipe-clean flat panel — Reluctance DC motor — — Washable grille z z Power-airflow flap (horizontal blade) — — MOLD PROOF operation
SiUS181631EA Part 2 Specifications 1. Specifications ............................................................................................10 1.1 Outdoor Unit ............................................................................................... 10 1.2 Branch Provider (BP) Unit .......................................................................... 11 1.3 Indoor Unit..................................................................................................
Specifications SiUS181631EA 1. Specifications 1.1 Outdoor Unit 60 Hz, 208 - 230 V Model Cooling Capacity Heating Capacity COP ★ EER ★ SEER ★ HSPF ★ Casing Color Heat Exchanger Type Piston Displacement Number of Compressor Revolutions Motor Output (2.2 kW / 60 rps) Starting Method Model Refrigerant Oil Charge Type Refrigerant Charge Control Type Motor Output Fan Airflow rate Drive Dimensions (H × W × D) Weight (Mass) Liquid Piping Connections Gas Defrost Method Drawing No.
SiUS181631EA 1.2 Specifications Branch Provider (BP) Unit 60 Hz, 208 - 230 V Model BPMKS048A2U BPMKS049A3U Power Consumption W 10 10 Running Current Refrigerant Type A 0.05 0.05 R-410A Dimensions (H × W × D) in. (mm) Packaged Dimensions (H × W × D) in.
Specifications 1.3 SiUS181631EA Indoor Unit 1.3.1 CTXG Series 60 Hz, 208 - 230 V CTXG09QVJUW Model Cooling Heating Rated Capacity Front Panel Color Airflow Rate Fan H M L SL Type Motor Output Speed cfm (m³/min) W Steps A W % in. (mm) in. (mm) Lbs (kg) Lbs (kg) Heating 9 kBtu/h Class Silver 279 (7.9) 212 (6.0) 162 (4.6) 134 (3.8) 367 (10.4) 265 (7.5) 205 (5.8) 117 (3.3) Cross Flow Fan 29 5 Steps, Quiet, Auto Right, Left, Horizontal, Downward Removable, Washable, Mildew Proof 0.07 - 0.07 0.
SiUS181631EA Specifications 60 Hz, 208 - 230 V CTXG18QVJUW Model Cooling Rated Capacity Front Panel Color Airflow Rate Fan CTXG18QVJUS Heating Cooling 18 kBtu/h Class White 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 Liquid
Specifications SiUS181631EA 1.3.2 CTXS, FTXS Series 60 Hz, 208 - 230 V CTXS07JVJU Model Cooling Rated Capacity Front Panel Color Airflow Rate Fan H M L SL Type Motor Output Speed cfm (m³/min) Cooling 388 (11.0) 335 (9.5) 283 (8.0) – 400 (11.3) 357 (10.1) 314 (8.9) – 388 (11.0) 335 (9.5) 283 (8.0) – dB(A) 44 / 40 / 35 / – 44 / 39 / 34 / – 44 / 40 / 35 / – 44 / 39 / 34 / – dB – – – – A W % in. (mm) in. (mm) Lbs (kg) Lbs (kg) Both Liquid and Gas Pipes φ 1/4 (φ 6.4) φ 3/8 (φ 9.
SiUS181631EA Specifications 60 Hz, 208 - 230 V FTXS09LVJU Model Cooling Heating Rated Capacity Front Panel Color Airflow Rate Fan H M L SL Type Motor Output Speed cfm (m³/min) Heating 12 kBtu/h Class White 381 (10.8) 279 (7.9) 194 (5.5) 145 (4.1) 420 (11.9) 321 (9.1) 233 (6.6) 219 (6.2) 403 (11.4) 307 (8.7) 205 (5.8) 155 (4.4) 438 (12.4) 335 (9.5) 240 (6.8) 212 (6.0) Cross Flow Fan 23 5 Steps, Quiet, Auto Right, Left, Horizontal, Downward Removable, Washable, Mildew Proof 0.09 - 0.08 0.
Specifications SiUS181631EA 60 Hz, 208 - 230 V FTXS24LVJU Model Cooling Rated Capacity Front Panel Color Airflow Rate Fan Heating 24 kBtu/h Class White 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 Liquid Piping Gas Connections
SiUS181631EA Specifications 1.3.3 CDXS, FDXS Series 60 Hz, 208 - 230 V FDXS09LVJU Model Rated Capacity External Static Pressure H M Airflow Rate L SL Type Fan 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 Liquid Piping Gas Connections Drain Drawing No.
Specifications SiUS181631EA 60 Hz, 208 - 230 V CDXS24LVJU Model Rated Capacity External Static Pressure H M Airflow Rate L SL Type Fan 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 / SL Level Heat Insulation Liquid Piping Gas Connections Drain Drawing No. 18 Cooling Heating 24 kBtu/h Class 0.
SiUS181631EA Specifications 1.3.4 FVXS Series 60 Hz, 208 - 230 V FVXS09NVJU Model Cooling Heating Rated Capacity Front Panel Color Airflow Rate Fan H M L SL Type Motor Output Speed cfm (m³/min) W Steps A W % in. (mm) in. (mm) Lbs (kg) Lbs (kg) Heating 12 kBtu/h Class White 290 (8.2) 230 (6.5) 169 (4.8) 145 (4.1) 311 (8.8) 244 (6.9) 177 (5.0) 155 (4.4) Turbo Fan 12.3 5 Steps, Quiet, Auto Right, Left, Horizontal, Downward Removable, Washable, Mildew Proof 0.14 - 0.13 0.15 - 0.
Specifications SiUS181631EA 1.3.
SiUS181631EA Part 3 Printed Circuit Board Connector Wiring Diagram 1. Outdoor Unit..............................................................................................22 1.1 RMXS48LVJU ............................................................................................ 22 2. Branch Provider (BP) Unit.........................................................................25 2.1 BPMKS048A2U, BPMKS049A3U .............................................................. 25 3. Indoor Unit......
Outdoor Unit SiUS181631EA 1. Outdoor Unit 1.
SiUS181631EA Outdoor Unit X106A X107A F6U P X111A HBP N X66A W X37A V U X81A X5A X22A LE X21A X13A X11A X12A NC X18A X17A LC X32A HAP X25A X26A X27A X28A LD F4U 2P294944-17 Printed Circuit Board Connector Wiring Diagram 23
Outdoor Unit Service PCB (A2P) SiUS181631EA 1) 2) 3) 4) X205A H1P - H8P BS1 - BS5 DS1 Connector for main PCB (A1P) LED for service monitor (orange) Push button switch (mode, set, return, test, reset) DIP switch for cool/heat selector H1P H3P H5P H7P H8P H2P H4P H6P X205A DS1 BS2 BS1 Noise Filter PCB (A3P) 1) 2) 3) 4) LA, NA LB, NB E F1U BS4 BS5 BS3 2P174185-1 Terminal for terminal strip (power supply) Terminal for main PCB (A1P) Terminal for ground wire Fuse (6.
SiUS181631EA Branch Provider (BP) Unit 2. Branch Provider (BP) Unit 2.1 BPMKS048A2U, BPMKS049A3U PCB ASSY 1) X20A 2) X21A - X23A 3) X90A 4) F2U 5) X3M 6) X4M 7) X5M 8) F1, F2 (on X6M) 9) L1, L2 (on X1M) 10)E1 11)H1P (LED A) 12)H2P - H5P (LED 1 - 4) 13)DS2 Connector for bypass electronic expansion valve Connector for electronic expansion valve for room A, B, C (X23A for room C: BPMKS049A3U only) Connector for thermistors Fuse (3.
Indoor Unit SiUS181631EA 3. Indoor Unit 3.
SiUS181631EA Display/Signal Receiver PCB (A2P) Indoor Unit 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 button LED for operation (multi-color) LED for INTELLIGENT EYE (green) Address setting jumper ∗ Refer to page 141 for details. H1P H2P S51 S52 JA S1W Caution INTELLIGENT EYE Sensor PCB (A3P) 3P357402-2 Replace the PCB if you accidentally cut a wrong jumper. Jumpers are necessary for electronic circuit.
Indoor Unit 3.
SiUS181631EA Signal Receiver PCB (PCB2) Indoor Unit 1) S29 2) SW1 (S1W) Connector for control PCB (PCB1) Indoor unit ON/OFF button SW1 S29 2P290430-1 Buzzer PCB (PCB3) 1) S27 2) S38 3) RTH1 (R1T) Connector for control PCB (PCB1) Connector for display PCB (PCB4) Room temperature thermistor S27 S38 RTH1 2P290430-1 Display PCB (PCB4) 1) 2) 3) 4) S37 LED1 (H1P) LED2 (H2P) LED3 (H3P) Connector for buzzer PCB (PCB3) LED for operation (green) LED for timer (yellow) LED for HOME LEAVE operation (red)
Indoor Unit 3.3 SiUS181631EA CTXS07LVJU, FTXS09/12LVJU Control PCB (PCB1) 1) 2) 3) 4) 5) 6) 7) 8) 9) S1 S21 S25 S32 S41 S46 S47 H1, H2, H3, FG JA Connector for DC fan motor Connector for centralized control (HA) Connector for INTELLIGENT EYE sensor PCB (PCB4) Indoor heat exchanger thermistor Connector for swing motors Connector for display PCB (PCB3) Connector for signal receiver PCB (PCB2) Connector for terminal strip Address setting jumper ∗ Refer to page 141 for details.
SiUS181631EA Signal Receiver PCB (PCB2) Indoor Unit 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 button 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) S26 LED2 LED1 3P210728-1 Connector for control PCB (PCB1) S26 3EB86013-1
Indoor Unit 3.
SiUS181631EA Signal Receiver PCB (PCB2) Indoor Unit 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 button 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
Indoor Unit 3.
SiUS181631EA Display/Signal Receiver PCB (A2P) Indoor Unit 1) 2) 3) 4) 5) S1 SW1 (S1W) LED2 (H2P) LED3 (H3P) RTH1 (R1T) Connector for control PCB (A1P) Indoor unit ON/OFF button LED for timer (yellow) LED for operation (green) Room temperature thermistor S1 LED3 LED2 RTH1 1 SW1 2P084375-1 ★LED 1 does not function. Note: The symbols in the parenthesis are the names on the appropriate wiring diagram.
Indoor Unit 3.
SiUS181631EA Sensor PCB (PCB1) Indoor Unit 1) S49 2) RTH2 (R1T) Connector for control PCB (PCB2) Room temperature thermistor RTH2 S49 3P191450-1 Service PCB (PCB3) 1) S27 2) SW2 (S2W)-4 3) SW4 (S4W) Connector for control PCB (PCB2) Switch for upward airflow limit setting ∗ Refer to page 143 for details. ∗ Keep the other switches as factory setting. Switch for airflow selection ∗ Refer to page 76 for details.
Indoor Unit 3.
SiUS181631EA Wired Remote Controller 4. Wired Remote Controller 4.
Wireless Remote Controller Kit SiUS181631EA 5. Wireless Remote Controller Kit 5.1 BRC082A41W, BRC082A42W(S) Transmitter Board (A2P) 1) X1A 2) X2A 3) SS1 4) SS2 Connector for receiver (A3P) Connector for control PCB (A1P) MAIN/SUB setting switch ∗ Refer to page 149 for details. Address setting switch ∗ Refer to page 149 for details.
SiUS181631EA Part 4 Refrigerant Circuit 1. Refrigerant Circuit .....................................................................................42 1.1 Outdoor Unit ............................................................................................... 42 1.2 Branch Provider (BP) Unit .......................................................................... 43 2. Functional Parts Layout ............................................................................44 3.
Refrigerant Circuit SiUS181631EA 1. Refrigerant Circuit 1.1 Outdoor Unit No.
SiUS181631EA 1.2 Refrigerant Circuit Branch Provider (BP) Unit No. in diagram Symbol A EVU Electronic expansion valve (for operating room) Among EVA, EVB and EVC, the electronic expansion valve of operating room is called EVU. B EVT Electronic expansion valve (for non-operating room) Among EVA, EVB and EVC, the electronic expansion valve of stopping room is called EVT.
Functional Parts Layout SiUS181631EA 2.
SiUS181631EA Functional Parts Layout Back View R6T : Thermistor (subcooling heat exchanger gas pipe) (Marking : white) R3T : Thermistor (suction pipe 1) (Marking : red) R5T : Thermistor (suction pipe 2) (Marking : green) R1T : Thermistor (outdoor temperature) (Marking : yellow) R7T : Thermistor (liquid pipe) R4T : Thermistor (outdoor heat exchanger) (Marking : blue) (Connector : blue) (R17940) Refrigerant Circuit 45
46 FILTER SERVICE PORT ELECTRONIC EXPANSION VALVE (Y1E) PRESSURE REGULATING VALVE Y1E Y3E Y2S 480 pulse PI control OFF ELECTRONIC EXPANSION VALVE (Y3E) FILTER ACCUMULATOR CAPILLARY TUBE SERVICE PORT FILTER DOUBLE PIPE HEAT EXCHANGER LOW PRESSURE SENSOR : High pressure liquid refrigerant : High pressure high temp. gas refrigerant : Low pressure low temp.
Refrigerant Circuit SERVICE PORT FILTER ELECTRONIC EXPANSION VALVE (Y1E) PRESSURE REGULATING VALVE Y1E Y3E Y2S PI control PI control OFF ELECTRONIC EXPANSION VALVE (Y3E) FILTER ACCUMULATOR CAPILLARY TUBE SERVICE PORT FILTER DOUBLE PIPE HEAT EXCHANGER LOW PRESSURE SENSOR : High pressure liquid refrigerant : High pressure high temp. gas refrigerant : Low pressure low temp.
48 FILTER SERVICE PORT ELECTRONIC EXPANSION VALVE (Y1E) PRESSURE REGULATING VALVE Y1E Y3E Y2S 480 pulse Full close OFF ELECTRONIC EXPANSION VALVE (Y3E) FILTER ACCUMULATOR CAPILLARY TUBE SERVICE PORT FILTER DOUBLE PIPE HEAT EXCHANGER LOW PRESSURE SENSOR FILTER SV SOLENOID VALVE COMPRESSOR : High pressure liquid refrigerant : High pressure high temp. gas refrigerant : Low pressure low temp.
Refrigerant Circuit FILTER SERVICE PORT CAPILLARY TUBE PRESSURE REGULATING VALVE Y1E Y3E Y2S 480 pulse 55 pulse OFF ELECTRONIC EXPANSION VALVE (Y3E) FILTER ACCUMULATOR CAPILLARY TUBE SERVICE PORT FILTER DOUBLE PIPE HEAT EXCHANGER LOW PRESSURE SENSOR FILTER SV SOLENOID VALVE COMPRESSOR ELECTRONIC EXPANSION VALVE (Y1E) CAPILLARY TUBE HIGH PRESSURE SWITCH : High pressure liquid refrigerant : High pressure high temp. gas refrigerant : Low pressure low temp.
SiUS181631EA Part 5 Functions and Control 1. Operation Mode ........................................................................................52 2. Basic Control.............................................................................................53 2.1 2.2 2.3 2.4 Normal Operation ....................................................................................... 53 Compressor PI Control...............................................................................
SiUS181631EA 7.12 7.13 7.14 7.15 7.16 POWERFUL Operation .............................................................................. 87 Multi-Monitor Lamp/TIMER Lamp .............................................................. 88 Clock Setting .............................................................................................. 89 WEEKLY TIMER Operation ....................................................................... 90 Other Functions..................................................
Operation Mode SiUS181631EA 1.
SiUS181631EA Basic Control 2. Basic Control 2.
Basic Control SiUS181631EA Step 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Full-load 52.0 Hz 57.0 Hz 62.0 Hz 68.0 Hz 74.0 Hz 80.0 Hz 86.0 Hz 92.0 Hz 98.0 Hz 104.0 Hz Unload 36.0 Hz 39.0 Hz 43.0 Hz 47.0 Hz 52.0 Hz 57.0 Hz 64.0 Hz 71.0 Hz 78.0 Hz Step 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Full-load 110.0 Hz 116.0 Hz 122.0 Hz 128.0 Hz 134.0 Hz 140.0 Hz 146.0 Hz 152.0 Hz 158.0 Hz 164.0 Hz 170.0 Hz 175.0 Hz 180.0 Hz 185.0 Hz 190.0 Hz 195.
SiUS181631EA 2.4 Basic Control Cooling Operation Fan Control In cooling operation with low outdoor temperature, cooling operation fan control provides the adequate amount of circulating air with liquid pressure secured by high pressure control using the outdoor fan. When the outdoor temperature is ≥ 20°C (68°F), the fan operates in STEP 7 or higher. When the outdoor temperature is ≥ 18°C (64.4°F), it operates in STEP 5 or higher. When the outdoor temperature is ≥ 12°C (53.
Special Control SiUS181631EA 3. Special Control 3.1 Startup Control Startup control equalizes the pressure in the front and back of the compressor before the startup of the compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor. To avoid stresses to the compressor due to oil return operation, etc. after startup, the following control is made and the position of the four way valve is also determined.
SiUS181631EA 3.2 Special Control Oil Return Operation In order to prevent the compressor from running out of oil, the oil return operation is conducted to recover oil flown out from the compressor to the system side. 3.2.
Special Control SiUS181631EA 3.2.2 Oil Return Operation in Heating Operation Conditions to start Oil return operation in heating operation is started referring to the following conditions: Integrated amount of displaced oil Timer setting (Make this setting so as to start the oil return operation when the initial cumulative operating time reaches 2 hours after power supply is turned ON and then every 8 hours.) The integrated amount of displaced oil is derived from Tc, Te, and the compressor load.
SiUS181631EA 3.3 Special Control Defrosting Operation The defrosting operation is performed to solve frost on the outdoor unit heat exchanger when heating, in order to recover heating capacity. Conditions to start The defrosting operation is started referring to the following conditions: Outdoor heat exchanger heat transfer co-efficiency Outdoor heat exchanger temperature (Tb) Timer (2 hours at the minimum) Outdoor heat-exchange co-efficiency is derived from Tc, Te, and the compressor load.
Special Control SiUS181631EA 3.4.1 Pump-down Residual Operation in Cooling Operation Pump-down residual operation Actuator Step 1 Step 2 Compressor 124 Hz Full load 52 Hz Full load Outdoor fan Fan control Fan control Four way valve (Y1S) OFF OFF Main electronic expansion valve (Y1E) 480 pulse 240 pulse Subcooling electronic expansion valve (Y3E) 0 pulse 0 pulse Hot gas bypass solenoid valve (Y2S) OFF OFF Ending conditions 2 sec. 2 sec. 3.4.
SiUS181631EA Protection Control 4. Protection Control 4.1 High Pressure Protection Control Outline High pressure protection control is used to prevent the activation of protection devices due to an abnormal increase of high pressure and to protect compressors against the temporary increase of high pressure. Cooling Operation Pc > 3.
Protection Control 4.2 SiUS181631EA Low Pressure Protection Control Outline Low pressure protection control is used to protect compressors against the temporary decrease of low pressure. Cooling Operation Low pressure not limited Pe < 0.25 MPa (84 ftAq) Pe: Low pressure sensor detection value Pe > 0.39 MPa (130 ftAq) Low pressure limited Hot gas bypass valve = OFF Pe < 0.15 MPa (50 ftAq) Pe > 0.30 MPa (100 ftAq) 36 Hz Unload Hot gas bypass valve = ON Pe < 0.
SiUS181631EA 4.3 Protection Control Discharge Pipe Temperature Protection Control Outline Discharge pipe temperature protection control protects the compressor internal temperature against a malfunction or temporary increase of discharge pipe temperature. Compressor or or HTdi > 115˚C (239˚F) Tp > 135˚C (275˚F) Discharge pipe temperature protection control not limited HTdi < 100˚C (212˚F) Upper limit frequency: 1-step down from current compressor frequency HTdi > 115˚C After 30 sec.
Protection Control 4.4 SiUS181631EA Inverter Protection Control Outline Inverter overcurrent protection control and inverter fin temperature control are performed to prevent tripping due to a malfunction, temporary inverter overcurrent, or radiation fin temperature increase. Inverter overcurrent protection control Not limited & Inverter current > 23.8 A Inverter current ≤ 23.8 A Upper limit frequency = max Hz Limited Upper limit frequency: 1-step down 10 sec.
SiUS181631EA 4.5 Protection Control Freeze-up Protection Control According to the freeze prevention status sent from the BP unit, the compressor output frequency is regulated to decrease compressor capacity in order to prevent the indoor heat exchanger from freezing. Details Zones are divided based on the freeze prevention status signal sent from the BP unit (indoor unit), and the freeze prevention control prevents freezing of the indoor unit. Indoor heat exchanger temperature Outline ˚F ˚C 55.
Protection Control 4.6 SiUS181631EA Dew Condensation Prevention Control According to the dew condensation prevention status sent from the BP unit, the compressor output frequency is regulated to decrease compressor capacity in order to prevent the indoor unit from dew condensation. Details Zones are divided based on the dew condensation prevention status signal sent from the BP unit (indoor unit), and the dew condensation prevention control prevents dew condensation of the indoor unit.
SiUS181631EA Other Control 5. Other Control 5.1 Demand Control In order to lower power consumption, the capacity of the outdoor unit is forcibly lowered using the Demand 1 Setting. To operate the unit with this mode, additional setting of Constant Demand Setting is necessary.
Branch Provider (BP) Unit Control SiUS181631EA 6. Branch Provider (BP) Unit Control 6.1 Branch Provider (BP) Unit Command Conversion 1. ∆D (room thermistor temperature − target temperature) signals from BP units are converted to a capacity up/down signal. ∆D signals from BP units are used as the capacity up/down signal in frequency commands (excludes during POWERFUL operation). ∆D Signal Capacity up/down signal 0 1 Thermostat OFF 2 3 4 5 Down Keep 6 7 8 9 10 11 Up 12 13 14 15 2.
SiUS181631EA 6.2 Branch Provider (BP) Unit Control Branch Provider (BP) Unit Electronic Expansion Valve Control This function provides instructions regarding the absolute flow rate, relative flow rate and fully closing from the outdoor unit to the BP unit in order to ensure outdoor unit compressor safety and optimum refrigerating cycle of the system.
Branch Provider (BP) Unit Control SiUS181631EA 6.2.3 Full Closing of Electronic Expansion Valves Outline The electronic expansion valves are initialized when the power is turned on. Details The following processes are conducted. 1. Conducts P1 pulses close when power is turned on, and sets current opening to 0 pulse (fully closing process). 2. Sends electronic expansion valve initialization signal to outdoor unit. 3.
SiUS181631EA 6.3 Branch Provider (BP) Unit Control SH Control in Cooling Operation Outline This function ensures appropriate refrigerant distribution when many indoor units are operating in cooling operation.
Branch Provider (BP) Unit Control 6.4 SiUS181631EA SC Control in Heating Operation Outline This function ensures appropriate refrigerant distribution when many indoor units are operating in heating operation.
SiUS181631EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions 7. CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions 7.1 Temperature Control Definitions of Temperatures The definitions of temperatures are classified as following.
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS181631EA Heating During heating operation, the large flap directs airflow downward to spread the warm air to the entire room. Wide-Angle Louvers The louvers, made of elastic synthetic resin, provide a wide range of airflow that guarantees comfortable air distribution.
SiUS181631EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions FVXS Series Flap (up and down) 40 25˚ ˚ 90 ˚ 90 Upward airflow limit OFF Heating ˚ Cooling/Dry 20˚ ˚ 90 ˚ 90 Upward airflow limit ON (R6829) 20˚ (R6831) (R6832) 3-D Airflow (R6830) CTXG, CTXS, FTXS Series Alternative repetition of vertical and horizontal swing motions enables uniform air-conditioning of the entire room.
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions Airflow Selection Setting SiUS181631EA FVXS Series Airflow direction can be set with the airflow selection switch. Open the front panel 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.
SiUS181631EA 7.3 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature. Automatic Fan Speed Control In automatic fan speed control, the step SL is not available.
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions COMFORT AIRFLOW Operation SiUS181631EA CTXG, CTXS-L, FTXS-L Series The fan speed is automatically controlled within the following steps. Cooling L tap ~ MH tap (same as AUTOMATIC) Heating In order to obtain a comfortable airflow, the fan speed may be set to a rate different from automatic fan speed control. The latest command has the priority between POWERFUL and COMFORT AIRFLOW. 7.
SiUS181631EA 7.5 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions Automatic Operation Outline Details Automatic Cooling/Heating Function When the automatic operation is selected with the remote controller, the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start-up. The unit automatically switches the operation mode to maintain the room temperature at the set temperature.
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS181631EA CDXS, FDXS, 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.
SiUS181631EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions CTXS-L, 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) CTXS-J, CTXS-H, CDXS, FDXS, FVXS series OFF Room thermistor temperature – target temperature Zone A Zone B 1.5˚C (2.7˚F) 1.0˚C (1.8˚F) Zone C 0˚C (0˚F) ON (R24034) Refer to Temperature Control on page 73 for details. 7.
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions 7.8 SiUS181631EA ECONO Operation Applicable Models CTXG09/12/18QVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU FDXS09/12LVJU CDXS15/18/24LVJU FVXS09/12/15/18NVJU Outline ECONO operation reduces the maximum operating current and the power consumption. This operation is particularly convenient for energy-saving. It is also a major bonus when breaker capacity does not allow the use of multiple electrical devices and air conditioners.
SiUS181631EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions If this button is pressed in POWERFUL operation, the POWERFUL operation is canceled and this function becomes effective. HOME LEAVE button is ineffective in dry operation and fan operation. End of Function The function ends when HOME LEAVE button is pressed again during HOME LEAVE operation or when POWERFUL button is pressed. Cooling HOME LEAVE operation set temp. Set temp.
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS181631EA 7.10 2-Area INTELLIGENT EYE Operation Applicable Models CTXG09/12/18QVJUW(S) Outline The following functions can be performed by the microcomputer with a motion sensor. 1. Reduction of the capacity when there is nobody in the room in order to save electricity (energy saving operation) 2. Dividing the room into plural areas and detecting presence of humans in each area.
SiUS181631EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions 2. Motions (in cooling) within 20 min. within 20 min. within 20 min. 20 min. Human detection signal ON OFF ↑ 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.
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS181631EA 7.11 INTELLIGENT EYE Operation Applicable Models CTXS07JVJU CTXS09/12HVJU 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.
SiUS181631EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions When there is no signal from the motion sensor in 20 minutes, the microcomputer judges that nobody is in the room and operates the unit at a temperature shifted from the target temperature. (Cooling/Dry: 1 ~ 2°C (1.8 ~ 3.6°F) higher, Heating: 2°C (3.6°F) lower, Auto: according to the operation mode at that time.) Note: For dry operation, the target temperature is shifted internally.
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS181631EA 7.13 Multi-Monitor Lamp/TIMER Lamp Applicable Models CTXG09/12/18QVJUW(S) Features Current operation mode is displayed in color of the lamp of the indoor unit. Operating status can be monitored even in automatic operation in accordance with the actual operation mode. Multi-monitor lamp/ TIMER lamp (R19925) The lamp color changes according to the operation. ∗ AUTO ........................................................Red/Blue ∗ DRY ..
SiUS181631EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions 7.14 Clock Setting ARC452 Series ARC466 Series The clock can be set by taking the following steps: 1. Press CLOCK button. is displayed. MON and blink. → 2. Press SELECT ▲ or SELECT ▼ button to set the clock to the current day of the week. 3. Press CLOCK button. blinks. → 4. Press SELECT ▲ or SELECT ▼ button to set the clock to the present time. Holding down SELECT ▲ or SELECT ▼ button increases or decreases the time display rapidly. 5.
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS181631EA 7.15 WEEKLY TIMER Operation Applicable Models CTXG09/12/18QVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU FVXS09/12/15/18NVJU Outline Up to 4 timer settings can be saved for each day of the week (up to 28 settings in total). The 3 items: ON/OFF, temperature, and time can be set. Details ★ The illustrations are for CTXG series as representative.
SiUS181631EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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.
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions 6. Press SiUS181631EA 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).
SiUS181631EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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.
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS181631EA 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 .
SiUS181631EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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.
CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions SiUS181631EA 7.16 Other Functions 7.16.1 Hot-Start Function In order to prevent the cold air blast that normally occurs when heating operation starts, the temperature of the indoor heat exchanger is detected, and the airflow is either stopped or significantly weakened resulting in comfortable heating. Note: The cold air blast is prevented using similar control when defrost control starts or when the thermostat is turned ON. 7.16.
SiUS181631EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Functions FVXS Series ON/OFF button (R23926) 7.16.4 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: Functions and Control It takes 3 minutes to restart the operation because the 3-minute standby function is activated.
FFQ Series Function SiUS181631EA 8. FFQ Series Function 8.1 Temperature Control Definitions of Temperatures The definitions of temperatures are classified as following.
SiUS181631EA 8.2 FFQ Series Function Airflow Direction Control Outline There are two types of airflow direction settings. Automatic swing setting The flaps automatically oscillate up and down. Indoor unit (Automatic swing) (Automatic swing) (R24069) Airflow direction fixed setting You can select from one of the fixed directions. The display of the remote controller and the actual angle of the flap do not match.
FFQ Series Function 8.4 SiUS181631EA 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.
SiUS181631EA 8.5 FFQ Series Function Clock and Calendar Setting (With Wired Remote Controller BRC1E73) 1 2 3 4 5 Press Menu/OK button to display the main menu screen. Press buttons to select Clock & Calendar on the main menu screen. Press Menu/OK button to display the clock & calendar screen. Press buttons to select Date & Time on the clock & calendar screen. Press Menu/OK button to display the date & time screen. Select Year with buttons. Change the year with buttons.
FFQ Series Function SiUS181631EA 6 7 Select Hour with buttons. Change the hour with buttons. Holding down the button causes the number to change continuously. Select Minute with buttons. Change the minute with buttons. Holding down the button causes the number to change continuously. Press Menu/OK button. 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.
SiUS181631EA 8.6 FFQ Series Function Schedule TIMER Operation (With Wired Remote Controller BRC1E73) Outline Day settings are selected from 4 patterns: 7Days Weekday/Sat/Sun Weekday/Weekend Everyday Up to 5 actions can be set for each day. Details Set the startup time and operation stop time. ON: Startup time, cooling and heating temperature setpoints can be configured. OFF: Operation stop time, cooling and heating setback temperature setpoints can be configured.
FFQ Series Function SiUS181631EA 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.
SiUS181631EA FFQ Series Function 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.
FFQ Series Function SiUS181631EA Enabling or disabling the schedule 1 2 3 Display the schedule screen. Press buttons to select Enable / Disable on the schedule screen. Press Menu/OK button to display the enable/disable screen. Press buttons to select Enable or Disable on the enable/disable screen. Press Menu/OK button after selecting the item. The confirmation screen is displayed. Press buttons to select Yes on the confirmation screen.
SiUS181631EA 8.7 FFQ Series Function Setback Function (With Wired Remote Controller BRC1E73) The Setback function can be used to maintain the space temperature in an assigned range for an unoccupied period. The setback icon flashes on the LCD of wired remote controller when the unit is turned on by the setback control. When enabled, the Setback mode becomes active when the indoor unit is turned off by either the user, a schedule event or an off timer. Setback function is not available by default.
FFQ Series Function SiUS181631EA 8.8.2 If the Float Switch is OFF with the Thermostat ON in Cooling Operation ∗2 ∗3 ∗1 ∗4 OFF Float switch ON 5 sec. 5 sec. Thermostat ON (running) OFF Error display A3 ON OFF Drain pump ON OFF 5 min. 5 sec. 5 min. 5 sec. 5 min. 5 sec. (R24610) When the float switch stays OFF for 5 sec., the thermostat turns OFF. After the thermostat turns OFF, the drain pump continues to operate for another 5 minutes.
SiUS181631EA FFQ Series Function 8.8.4 If the Float Switch Turns OFF and ON Continuously, or the Float Switch Turns OFF While AF Displayed ∗1 OFF Float Switch Thermostat (running) ∗2 1st 4th 5th 5 sec. 5 sec. 5 sec. ON ON 5 sec. 5 sec. OFF AF ON Error Display ∗3 A3 OFF ON Drain Pump OFF 5 min. 5 min. 5 min. 5 sec. 5 min. 5 sec. 5 min. 5 min. 5 min. 5 sec. 5 min. 5 sec. 5 min. 5 min. 5 sec. 5 sec. (R24370) When the float switch stays OFF for 5 sec.
FFQ Series Function SiUS181631EA 8.10 Presence and Floor Sensors (Option) Outline With the human presence signal and the floor temperature signal from the optional sensor kit, the system provides the energy saving control, or the comfortable temperature control and airflow direction control preventing the direct draft to the human. To use sensor related functions, a wired remote controller (BRC1E73) and optional sensor kit (BRYQ60A2W(S)) are necessary to be installed. Details 1.
SiUS181631EA FFQ Series Function 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.
FFQ Series Function SiUS181631EA 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.
SiUS181631EA FFQ Series Function 8.11 Other Functions 8.11.1 Signal Receiving Sign When the indoor unit receives a signal from the remote controller, the unit emits a signal receiving sound. 8.11.2 Auto-restart Function If a power failure (even a momentary one) occurs during the operation, the system restarts automatically in the same conditions as before when the power supply is restored to the conditions prior to the power failure.
SiUS181631EA Part 6 Test Operation and Field Settings 1. Test Operation ........................................................................................ 115 1.1 1.2 1.3 1.4 1.5 Procedure and Outline ............................................................................. 115 Operation when Power is Turned On ....................................................... 117 Branch Provider (BP) Unit ........................................................................
SiUS181631EA Test Operation 1. Test Operation 1.1 Procedure and Outline Follow the following procedure to conduct the initial test operation after installation. 1.1.1 Check Work Prior to Turn Power Supply On Check the below items.
Test Operation SiUS181631EA 1.1.3 Check Operation * During check operation, mount front panel to avoid the misjudging. * Check operation is mandatory for normal unit operation. (When the check operation is not executed, alarm code U3 is displayed.) Press and hold the TEST (BS4) button on outdoor unit PCB for 5 seconds. Check on operation { The test operation is started automatically. The following judgments are conducted within 15 minutes (about 30 at the maximum).
SiUS181631EA Test Operation 1.1.4 Confirmation on Normal Operation • • • • • 1.2 Conduct normal unit operation after the check operation has been completed. (When outdoor air temperature is 24°CDB (75.2°FDB) or higher, the unit can not be operated with heating operation. See the installation manual attached.) Confirm that the indoor/outdoor units can be operated normally.
Test Operation 1.3 SiUS181631EA Branch Provider (BP) Unit 1.3.1 Judging and reprogramming in case of redundant BP addresses The BP unit of this system is provided with specific addresses in its production stage. These addresses are for various controls. If by any chance (on 3 out of 260000 units) these addresses are redundant, the system may get in trouble. When replacing the PCB of the BP unit too, these addresses may be used repeatedly.
SiUS181631EA Test Operation Example of DIP switch (DS2) settings on the BP unit's PCB DS2-1 DS2-2 DS2-3 DS2-4 BP unit 1 BP unit 2 OFF OFF OFF OFF ON OFF OFF ON BP unit 3 OFF OFF ON ON DS1 ~ 4 : Factory setting is OFF. The BP unit 1 through 3 show the first through third unit, respectively. The order of these BP units is flexible. The above table is only for your reference. The redundancy of addresses can be avoided when the DIP switch settings are individually specified.
Test Operation 1.4 SiUS181631EA CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Outline Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts, such as flap movement, are working properly. Trial operation should be carried out in either cooling or heating operation. Details 1. Measure the power supply voltage and make sure that it falls within the specified range. 2.
SiUS181631EA Test Operation ARC466 Series (1) Press On/Off button to turn on the system. (2) Press the center of Temp button and Mode button at the same time. (3) Select T (test operation) with Temp ▲ or Temp ▼ button. (4) Press Mode button to start the test operation. (5) Press Mode button and select operation mode. (6) Test operation terminates in about 30 minutes and switches into normal mode. To quit test operation, press On/Off button.
Test Operation 1.5 SiUS181631EA FFQ Series Make sure to install the decoration panel before carrying out trial operation if the wireless Outline remote controller is used. Trial operation should be carried out in either cooling or heating operation. 1. Measure the supply voltage and make sure that it is within the specified range. 2. In cooling operation, select the lowest programmable temperature; in heating operation, select the highest programmable temperature. 3.
SiUS181631EA Test Operation With Wired Remote Controller (BRC1E73) 1. Set to COOL or HEAT operation using the remote controller. 2. Press and hold Cancel button for 4 seconds or longer. Service settings menu is displayed. Basic screen 1. 2. 3. Select Test Operation in the service settings menu, and press Menu/OK button. Basic screen returns and “Test Operation” 3. is displayed at the bottom. Cool Set to 68 F Press and hold Cancel button for 4 seconds or longer during backlight lit.
Test Operation SiUS181631EA With Wireless Remote Controller Kit (BRC082A41W, BRC082A42W(S)) 1. Press button and select the COOL or HEAT operation. 2. Press button twice. “TEST” is displayed. 3. Press button within 10 seconds, and the test operation starts. Monitor the operation of the indoor unit for a minimum of 10 minutes. During test operation, the indoor unit will continue to cool/heat regardless of the temperature setpoint and room temperature.
SiUS181631EA Field Settings 2. Field Settings 2.1 Outdoor Unit 2.1.1 Setting Mode and Monitor Mode Outline The following 3 modes can be changed over with the button switches on the service PCB and you can find the present mode by the status of the H1P indicator. H1P H3P H5P H7P H2P H4P H6P BS2 BS3 BS5 BS1 BS4 (MODE) (SET) (RETURN) (TEST) (RESET) (R15629) (1) Setting mode 1 (H1P off) Initial status (normal) : Also indicates during abnormal.
Field Settings SiUS181631EA Setting Mode 1 This mode is used to set and check the following items. 1. Set items ············ In order to make COOL/HEAT selection in a batch of outdoor unit group, change the setting. • COOL/HEAT selection (IND) ·····················Used to select COOL or HEAT by individual outdoor unit (factory setting). • COOL/HEAT selection (MASTER) ············Used to select COOL or HEAT by outdoor unit group with the master unit.
SiUS181631EA Field Settings Setting Mode 2 Press MODE (BS1) button for 5 seconds and enter the setting mode 2. No. 1 2 3 Setting item Cool/heat unified address Low noise/demand address Test operation settings Selection of setting items Press SET (BS2) button and select a setting item according to the LED pattern shown in the table on the right. ↓ Press RETURN (BS3) button and decide the item. (The present setting condition is shown.
Field Settings SiUS181631EA Setting item display No.
SiUS181631EA Field Settings Setting item display No.
Field Settings SiUS181631EA Monitor Mode Press MODE (BS1) button and enter the monitor mode. No. LED display Check item Confirmation on check item Press RETURN (BS3) button to display different data of check item. Press RETURN (BS3) button and return to the initial status of monitor mode. H2P H3P H4P H5P H6P H7P h h h h h h h h h h h h h h h h h h h h h h h h h k k h h h h k k k h h h h k k h h k h k h k h k h k k h k See the note below.
SiUS181631EA Field Settings Press BS2 (SET button) and match with the LEDs No. 1 - 15, press BS3 (RETURN button), and confirm the data for each setting. ★ Data such as addresses and number of units is expressed as binary numbers; the two ways of expressing are as follows: Figure 1 l hlhllh 16 32 4 8 1 2 (R12951) The No. 1 cool/heat unified address is expressed as a binary number consisting of the lower 6 digits.
Field Settings SiUS181631EA Switching Mode (1): Set Cool/Heat Separately for Each Outdoor Unit System by Indoor Unit Remote Controller It does not matter whether or not there is outdoor - outdoor unit wiring. Set the DIP switch DS1-1 of the outdoor unit PCB (A2P) to IN (factory setting). Set cool/heat switching to IND (individual) in the setting mode 1 (factory setting). (Refer to page 126 for details.
SiUS181631EA Field Settings Set the master unit (indoor unit having the right to select the cooling/heating operation mode). In the case of wired remote controllers • After the check operation, “CHANGEOVER UNDER CONTROL” is flashing in all connected remote controllers. • Select an indoor unit to be used as the master unit in accordance with the request from the customer. (It is recommended to select an indoor unit which will be used most often as the master unit.
Field Settings SiUS181631EA 2.1.3 Setting of Low Noise Operation and Demand Operation Setting of Low Noise Operation By connecting the external contact input to the low noise input of the outdoor unit external control adaptor (optional), you can lower operating noise by 2 ~ 3 dB. When the low noise operation is automatically carried out at night (The external control adaptor for outdoor unit is not required) 1. While in setting mode 2, select the setting condition (i.e.
SiUS181631EA Field Settings Setting of Demand Operation By connecting the external contact input to the demand input of the outdoor unit external control adaptor (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition. Set item Demand Condition Mode 1 Content The compressor operates at 60% or less of rating. Mode 2 Mode 3 The compressor operates at 70% or less of rating. The compressor operates at 80% or less of rating.
Field Settings SiUS181631EA Detailed Setting Procedure of Low Noise Operation and Demand Control 1. Setting mode 1 (H1P off) In setting mode 2, press BS1 (MODE button) one time. → The system enters setting mode 1 and the H1P goes off. In setting mode 1, the H6P (In low noise operation) and the H7P (In demand control) keep lighting. 2. Setting mode 2 (H1P on) (1) In setting mode 1, press and hold BS1 (MODE button) for more than 5 seconds. → The system enters setting mode 2 and the H1P lights up.
SiUS181631EA Field Settings 2.1.4 Setting of Refrigerant Additional Charging Operation When the outdoor unit is stopped and the entire quantity of refrigerant cannot be charged from the stop valve on the liquid side, make sure to charge the remaining quantity of refrigerant using this procedure. If the refrigerant quantity is insufficient, the unit may malfunction. (1) Turn ON the power of the indoor unit and the outdoor unit.
Field Settings SiUS181631EA 2.1.6 Setting of Vacuuming Mode In order to perform vacuuming operation at site, fully open the expansion valves of indoor and outdoor units and turn on some solenoid valves. Operating procedure (1) In setting mode 2 with units in stop mode, set the item No.21 (refrigerant recovery/vacuuming mode) to ON. The respective expansion valve of indoor and outdoor units are fully opened.
SiUS181631EA 2.2 Field Settings CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 2.2.1 Model Type Setting ARC452A21, ARC452A23 The remote controller is common to the heat pump model and cooling only model. Make sure the DIP switch is set to the left side. The heating operation will not be available when the DIP switch is set to the right side.
Field Settings SiUS181631EA 2.2.2 Temperature Display Switch You can select Fahrenheit or Celsius for temperature display. ARC452A9, ARC452A21, ARC452A23 Press TEMP▲ and TEMP▼ buttons at the same time for 5 seconds to change the unit of temperature display. (R14477) ARC466A21, ARC466A36 Press the upper side of Temp button and On button at the same time for 5 seconds to change the unit of temperature display.
SiUS181631EA Field Settings 2.2.3 When 2 Units are Installed in 1 Room Outline When 2 indoor units are installed in 1 room, 1 of the 2 indoor units and the corresponding wireless remote controller can be set for different address. Both the indoor unit PCB and the wireless remote controller need alteration. The method of address setting varies depending on the type of indoor unit and the series of wired remote controller.
Field Settings CDXS, FDXS Series SiUS181631EA Cut the jumper JA on PCB. 1 JA 2 3 ADDRESS : JA EXIST 1 CUT 2 (R19089) Caution FVXS Series Replace the PCB if you accidentally cut a wrong jumper. Jumpers are necessary for electronic circuit. Improper operation may occur if you cut any of them. (1) Remove the front grille. (2) Lift the sensor PCB fixing plate and remove the front shield plate. (3) Disconnect the connectors S1, S41, S42. (4) Remove the electric box (1 screw).
SiUS181631EA Wireless Remote Controller Field Settings (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 ADDRESS EXIST 1 CUT 2 ∗ Do not cut the left jumper. (R12065) (R18416) Replace the remote controller if you accidentally cut a wrong jumper. Jumpers are necessary for electronic circuit. Improper operation may occur if you cut any of them. 2.2.
Field Settings 2.3 SiUS181631EA FFQ Series 2.3.1 How to Change the Field Settings Outline If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed. Refer to the instruction manual for each optional accessory. Note: When using 2 remote controllers for 1 indoor unit, change the field settings from MAIN remote controller. Note that the field settings can not be set from SUB remote controller. Wired Remote Controller (BRC1E73) d b c a (R18831) a Unit No.
SiUS181631EA 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.
Field Settings SiUS181631EA Wireless Remote Controller Kit (BRC082A41W, BRC082A42W(S)) 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 the /TEST button for at least 4 seconds to enter the Field Set mode. 2. Select the desired Mode No. with the MODE button. 3.
SiUS181631EA Field Settings 2.3.2 Overview of the Field Settings 12 (22) 04 05 06 — — — — 2 3 Disabled — — — — Remote controller thermistor Enabled Filter cleaning sign Display No display — — — — Optional accessories output Operation Outdoor air Presence Compressor — Error output selection (field selection of output intake sensor output for adaptor for wiring) High air outlet velocity (for high ≤ 2.7 m 2.7 ~ 3.0 m 3.0 ~ 3.
Field Settings SiUS181631EA 2.3.3 MAIN/SUB Setting when Using 2 Wired Remote Controllers Outline The MAIN/SUB setting is necessary when 1 indoor unit is controlled by 2 remote controllers. When you use 2 remote controllers, set one to MAIN and the other to SUB. Details 1. 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.
SiUS181631EA Field Settings 2.3.4 Address and MAIN/SUB Setting for Wireless Remote Controller Outline If setting multiple wireless remote controllers to operate in one room, perform address setting for the receiver and the wireless remote controller. If using both a wired remote controller and a wireless remote controller with 1 indoor unit, change the MAIN/SUB switch of the transmitter board.
Field Settings Wireless Remote Controller Address SiUS181631EA 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.
SiUS181631EA After Setting Field Settings Affix corresponding unit number labels onto both air outlet of the decoration panel and onto back of the wireless remote controller. (R24066) Note: Set the unit No. of the receiver and the wireless remote controller to be the equal. If the settings differ, the signal from the remote controller cannot be transmitted.
SiUS181631EA Part 7 Remote Controller 1. 2. 3. 4. 5. 6. 7. 8. 152 Applicable Remote Controller ................................................................. 153 ARC466A36 ............................................................................................ 154 ARC452A9 .............................................................................................. 156 ARC452A21 ............................................................................................ 158 ARC452A23 ............
SiUS181631EA Applicable Remote Controller 1.
ARC466A36 SiUS181631EA 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.
SiUS181631EA 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.
ARC452A9 SiUS181631EA 3. ARC452A9 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.
SiUS181631EA ARC452A9 Open the Front Cover MODE button • Selects the operation mode. AUTO DRY COOL HEAT FAN HOME LEAVE3 button • Press this button to start HOME LEAVE operation. The HOME LEAVE lamp lights up. QUIET button • 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.
ARC452A21 SiUS181631EA 4. ARC452A21 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.
SiUS181631EA 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 • OUTDOOR UNIT QUIET operation. • Adjusts the airflow direction. • When you press the 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 SiUS181631EA 5. 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.
SiUS181631EA ARC452A23 Open the Front Cover MODE button • Selects the operation mode. AUTO DRY COOL HEAT FAN ECONO2 button • Starts ECONO operation. QUIET button • 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 SiUS181631EA 6. 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).
SiUS181631EA 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 • 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.
BRC1E73 (Wired Remote Controller) SiUS181631EA 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.
SiUS181631EA 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.
BRC1E73 (Wired Remote Controller) SiUS181631EA 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.
SiUS181631EA BRC1E73 (Wired Remote Controller) Simple display 1.Operation mode 14.Selectable Display Item 3.Setpoint 11.Setback 2.Fan speed 4.Stand by for Defrost/ 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.
BRC1E73 (Wired Remote Controller) SiUS181631EA “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.
SiUS181631EA BRC1E73 (Wired Remote Controller) 11. Setback “ ” • The setback icon flashes when the unit is turned on by the setback control. 12. Airflow Direction “ ” • Displayed when the airflow direction and swing are set. • If the connected indoor unit model does not 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.
BRC082A41W, BRC082A42W(S) (Wireless Remote Controller Kit) SiUS181631EA 8.
SiUS181631EA BRC082A41W, BRC082A42W(S) (Wireless Remote Controller Kit) DISPLAY 1 2 (SIGNAL TRANSMISSION) This lights up when a signal is being transmitted. DISPLAY , , (OPERATION MODE) , , This display shows the current OPERATION MODE. 3 DISPLAY (SET TEMPERATURE) This display shows the set temperature. 4 DISPLAY (PROGRAMMED TIME) This display shows PROGRAMMED TIME of the system start or stop. 5 DISPLAY 6 DISPLAY (FAN SPEED) The display shows the set fan speed.
SiUS181631EA Part 8 Troubleshooting 1. Troubleshooting with LED .......................................................................174 1.1 Outdoor Unit ............................................................................................. 174 1.2 Branch Provider (BP) Unit ........................................................................ 179 1.3 Indoor Unit................................................................................................ 180 2. Service Diagnosis ............
SiUS181631EA 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 7.20 7.21 7.22 7.23 7.24 7.25 7.26 7.27 7.28 7.29 7.30 7.31 7.32 7.33 Actuation of High Pressure Switch ........................................................... 227 Actuation of Low Pressure Sensor ........................................................... 229 Compressor Motor Lock ........................................................................... 231 Outdoor Fan Motor Abnormality ..................
Troubleshooting with LED SiUS181631EA 1. Troubleshooting with LED 1.1 Outdoor Unit 1.1.1 Main PCB (A1P) The main PCB (A1P) has green LEDs (HAP, HBP). When the microprocessors work in order, the LEDs blink. HBP A3P C4 A2P A4P HAP A1P (R22090) 1.1.2 Service PCB (A2P) The error code can be identified with the orange LEDs (H1P~H7P) on the service PCB (A2P) in monitor mode.
SiUS181631EA Troubleshooting with LED Error code indication in monitor mode Monitor mode Press MODE (BS1) button and enter the monitor mode.
Troubleshooting with LED SiUS181631EA k : ON h : OFF l : Blink Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 Confirmation of malfunction 4 Error code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P E7 l l l l l h h h h h h h l l l h l h h l l l h l l H9 l h l h h l l h h l l l l l l l l l l E9 l l h h l F3 l h l h l l h h l l l k h h h h h l k k h h
SiUS181631EA Troubleshooting with LED Monitor mode Press MODE (BS1) button and enter the monitor mode. Contents of malfunction Selection of check item Press SET (BS2) button and select a check item according to the LED pattern of No.14~16 and No.20~22. Refer to page 130 for check items.
Troubleshooting with LED SiUS181631EA k : ON Error code P1 l l h h h P4 U0 l l h h l U2 l : Blink l h h h l l k h h h h h l k k h h l h l h h l k h h h h h l k k h h l h h h h l k h h h h h l k k h h l h h l h l l l l l l l l l k k k k k k k k k h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h l l l l l l l l k k k k k k k k k k k k k k k k k k h h h h h h h h h h l h h h l h l h l h
SiUS181631EA 1.2 Troubleshooting with LED Branch Provider (BP) Unit i: ON, h: OFF, j: Blinks, —: No matter Green : Blinks in normal condition Red : OFF in normal condition Green BP Unit LED Indication Red Description A 1 2 3 4 j j h i h h h h h h j j i h i i i h h i h i — — — — Defective BP unit PCB (Refer to note.) — — — — Power supply abnormality (Refer to note.) Note: Turn the power off then on again. If the LED display recurs, the BP unit PCB is defective.
Troubleshooting with LED 1.3 SiUS181631EA Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. When a protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions. When a signal transmission error occurs between the indoor and outdoor units. In either case, conduct the diagnostic procedure described in the following pages.
SiUS181631EA Troubleshooting with LED FFQ series with wired remote controller (BRC1E73) + Operation lamp (green) +The error or warning message also blinks on the basic screen. (R23942) FFQ series with wireless remote controller kit (BRC082A41W, BRC082A42W(S)) In case of wireless remote controller, a transmitter board (A2P) and a receiver (A3P) are installed on indoor unit. When the error occurs, the operation lamp on the receiver (A3P) blinks.
Service Diagnosis SiUS181631EA 2. Service Diagnosis 2.1 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 2.1.1 ARC452 Series Remote Controller 1. When TIMER CANCEL button is held down for 5 seconds, 00 is displayed on the temperature display screen. Method 1 TIMER CANCEL button < ARC452 Series > (R23945) 2. Press TIMER CANCEL button repeatedly until a long beep sounds. The code indication changes in the sequence shown below. ARC452A9, A21, A23 Notes: 182 No. 1 Code 00 No. 13 Code C7 No.
SiUS181631EA Method 2 Service Diagnosis 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 SiUS181631EA 5. Press TEMP ▲ or TEMP ▼ button and change the number until you hear the long beep. (R14547) 6. Diagnose by the sound. ★beep : The left-side number does not correspond with the error code. ★two consecutive beeps : The left-side number corresponds with the error code but the right-side number does not. ★long beep : Both the left-side and right-side number corresponds with the error code. 7. Determine the error code.
SiUS181631EA Service Diagnosis 2.1.2 ARC466 Series Remote Controller 1. When Timer Cancel button is held down for 5 seconds, 00 is displayed on the temperature display screen. Method 1 Timer Cancel button (R24045) < ARC466 Series > 2. Press Timer Cancel button repeatedly until a long beep sounds. The code indication changes in the sequence shown below. ARC466A21, A36 Notes: Troubleshooting No. Code No. Code No.
Service Diagnosis SiUS181631EA 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.
SiUS181631EA Service Diagnosis 5. Diagnose by the sound. ★ beep: The left-side number does not correspond with the error code. ★ two consecutive beeps: The left-side number corresponds with the error code but the rightside number does not. ★ long beep: Both the left-side and right-side numbers correspond with the error code. The numbers indicated when you hear the long beep are the error code. Refer to page 194, 195. 6. Press Mode button. (R24047) The right-side number blinks. (R11673) 7.
Service Diagnosis 2.2 SiUS181631EA FFQ Series 2.2.1 Wired Remote Controller (BRC1E73) 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.
SiUS181631EA 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 butto n F Error: Push Menu button * The Operation lamp will flash.
Service Diagnosis SiUS181631EA 2.2.2 Wireless Remote Controller Kit (BRC082A41W, BRC082A42W(S)) 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.
SiUS181631EA 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 SiUS181631EA 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.
SiUS181631EA 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.
Error Codes and Description SiUS181631EA 3.
SiUS181631EA Error code Error Codes and Description Description RA Indoor Unit Outdoor Unit System Outdoor Unit JC Low pressure sensor abnormality — — — 244 L1 Outdoor unit PCB abnormality — — — 245 L4 Radiation fin temperature rise — — — 246 L5 Inverter compressor abnormality — — — 247 L8 Inverter current abnormality — — — 248 L9 Compressor start-up error — — — 249 P1 High voltage of capacitor in main inverter circuit — — — 250 P4 Radiation fin thermistor a
Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS181631EA 4. Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 4.1 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.
SiUS181631EA Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 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 ∗ To secure the connection, disconnect the connectors once and then reconnect. Check the connection of connectors. (Refer to Note) OK? YES Check the power supply voltage.
Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 4.2 SiUS181631EA Freeze-up Protection Control/Heating Peak-cut Control Error Code A5 Method of Error Detection Freeze-up protection control Error Decision Conditions 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.
SiUS181631EA 4.3 Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Indoor Fan Motor or Related Abnormality 4.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable Models CTXG09/12/18QVJUW(S) CTXS07JVJU CTXS09/12HVJU 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 is used to determine abnormal fan motor operation.
Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Troubleshooting Caution Check No.02 Refer to P.206 SiUS181631EA 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.
SiUS181631EA Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 4.3.2 Indoor Fan Motor (AC Motor) or Related Abnormality (CDXS, FDXS Series) 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.
Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Troubleshooting Caution Check No.04 Refer to P.206 SiUS181631EA 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? Check No. 04 Check Hall IC NO Turn off the power and rotate the fan by hand.
SiUS181631EA 4.4 Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Thermistor or Related Abnormality C4, C9 Error Code Method of Error Detection The temperatures detected by the thermistors are used to determine thermistor errors. Error Decision Conditions The voltage between both ends of the thermistor is either 4.96 V or more, or 0.04 V or less during compressor operation. Supposed Causes Disconnection of connector Thermistor corresponding to the error code is defective.
Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 4.5 SiUS181631EA Front Panel Open/Close Fault Applicable Models CTXG09/12/18QVJUW(S) C7 Error Code 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.
SiUS181631EA 4.6 Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series Check for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series 4.6.1 Thermistor Resistance Check Check No.01 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using a multimeter. The data is for reference purpose only. Thermistor temperature Resistance (kΩ) °C –20 °F –4 –15 –10 5 14 148.2 112.1 –5 0 23 32 85.60 65.93 5 10 41 50 51.14 39.99 15 20 59 68 31.52 25.
Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS181631EA 4.6.2 Indoor Fan Motor Connector Check Check No.02 CTXG, CTXS, FTXS, FVXS Series 1. Check the connection of connector. 2. Check motor power supply voltage output (pins 4 - 7). 3. Check motor control voltage (pins 4 - 3). 4. Check rotation command voltage output (pins 4 - 2). 5. Check rotation pulse input (pins 4 - 1).
SiUS181631EA Troubleshooting for FFQ Series 5. Troubleshooting for FFQ Series 5.1 Indoor Unit PCB Abnormality Error Code A1 Method of Error Detection The system checks the data from EEPROM. Error Decision Conditions 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.
Troubleshooting for FFQ Series 5.2 SiUS181631EA Drain Level Control System Abnormality Error Code A3 Method of Error Detection The float switch detects error. Error Decision Conditions The water level reaches its upper limit and the float switch turns OFF.
SiUS181631EA 5.3 Troubleshooting for FFQ Series Indoor Fan Motor (DC Motor) or Related Abnormality Error Code A6 Method of Error Detection The rotation speed detected by the Hall IC during fan motor operation determines abnormal fan motor operation. Error Decision Conditions The fan motor is not revved up.
Troubleshooting for FFQ Series SiUS181631EA Troubleshooting Caution Check No.02 Refer to P.218 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.
SiUS181631EA 5.4 Troubleshooting for FFQ Series 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. Error Decision Conditions The float switch changes from ON to OFF while the system is OFF.
Troubleshooting for FFQ Series 5.5 SiUS181631EA 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 voltage between the both ends of the thermistor is 4.96 V and more or 0.04 V and less during compressor operation. Supposed Causes Disconnection of connector Thermistor corresponding to the error code is defective.
SiUS181631EA 5.6 Troubleshooting for FFQ Series Presence Sensor or Floor Sensor Abnormality 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. Supposed Causes Troubleshooting If the cause of the problem is related to the sensors, the sensors should be checked prior to changing the indoor unit PCB.
Troubleshooting for FFQ Series 5.7 SiUS181631EA 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 disconnected or shorted while the unit is running.
SiUS181631EA 5.8 Troubleshooting for FFQ Series 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.
Troubleshooting for FFQ Series 5.9 SiUS181631EA Signal Transmission Error (Between MAIN Remote Controller and SUB Remote Controller) 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.
SiUS181631EA Troubleshooting for FFQ Series 5.
Troubleshooting for FFQ Series SiUS181631EA 5.11 Check for FFQ Series 5.11.1 Indoor Fan Motor Connector Check Check No.02 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).
SiUS181631EA Troubleshooting for Branch Provider (BP) Unit 6. Troubleshooting for Branch Provider (BP) Unit 6.
Troubleshooting for Branch Provider (BP) Unit 6.2 SiUS181631EA Branch Provider (BP) Unit PCB Abnormality Error Code E2 Method of Error Detection Check data from EEPROM Error Decision Conditions When data could not be correctly received from the EEPROM EEPROM : Type of nonvolatile memory. Maintains memory contents even when the power supply is turned off.
SiUS181631EA 6.
Troubleshooting for Branch Provider (BP) Unit 6.4 SiUS181631EA Signal transmission Error between Indoor Unit and Branch Provider (BP) Unit Error Code U4 Method of Error Detection The signal transmission data from the BP unit is checked whether it is normal. Error Decision Conditions When the data sent from the BP unit cannot be received normally, or when the content of the data is abnormal.
SiUS181631EA Troubleshooting for Branch Provider (BP) Unit Troubleshooting Caution Check No.11 Refer to P.225 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Push and hold the RESET button on the outdoor unit PCB for 5 seconds. Does the malfunction occur again? NO Normal (Address Setting was not conducted) YES Check the indoor unit - BP unit connection wires.
Troubleshooting for Branch Provider (BP) Unit 6.5 SiUS181631EA Transmission Error between Outdoor Unit and Branch Provider (BP) Unit Error Code UJ Method of Error Detection Transmission error is detected when the outdoor unit could not received the data from BP unit correctly.
SiUS181631EA 6.6 Troubleshooting for Branch Provider (BP) Unit Check for Branch Provider (BP) Unit 6.6.1 Power Supply Waveforms Check Check No.11 Measure the power supply waveform between the pins L1 and L2 on the terminal board, and check the waveform disturbance. Check if the power supply waveform is a sine wave (Fig.1). Check if there is waveform disturbance near the zero-cross (sections circled in Fig.2) Fig.1 Troubleshooting Fig.
Troubleshooting for Outdoor Unit SiUS181631EA 7. Troubleshooting for Outdoor Unit 7.1 Outdoor Unit PCB Abnormality Error Code E1 Method of Error Detection Check data from EEPROM Error Decision Conditions When data could not be correctly received from the EEPROM EEPROM: Type of nonvolatile memory. Maintains memory contents even when the power supply is turned off.
SiUS181631EA 7.2 Troubleshooting for Outdoor Unit Actuation of High Pressure Switch Error Code E3 Method of Error Detection Abnormality is detected when the contact of the high pressure switch opens. Error Decision Conditions When the high pressure switch activation count reaches the number specific to the operation mode (Reference) Operating pressure: 4.0 MPa (1338 ftAq) Reset pressure: 3.
Troubleshooting for Outdoor Unit SiUS181631EA Troubleshooting Caution Check No.30 Refer to P.263 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check for the points shown below. (1) Is the stop valve open? (2) Is the high pressure switch connector properly connected to the main PCB (A1P)? (3) Does the high pressure switch have continuity? Are the three points above OK? NO Rectify the defective points.
SiUS181631EA 7.3 Troubleshooting for Outdoor Unit Actuation of Low Pressure Sensor Error Code E4 Method of Error Detection Detection by the pressure value with the low pressure sensor Error Decision Conditions When the low pressure is dropped under specific pressure Operating pressure: 0.07 MPa (23 ftAq) Supposed Causes Troubleshooting Abnormal drop of low pressure (Lower than 0.
Troubleshooting for Outdoor Unit SiUS181631EA Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Check No.31 Refer to P.264 Is the stop valve open? NO Open the stop valve. YES (1) Mount a pressure gauge on the low pressure service port. (2) Reset the operation using the remote controller, and then restart the operation. Are the characteristics of the low pressure sensor normal? (See ∗1.
SiUS181631EA 7.4 Troubleshooting for Outdoor Unit Compressor Motor Lock Error Code E5 Method of Error Detection The position signal is taken from UVW line, and the malfunction is detected when any abnormality is observed in the phase-current waveform. Error Decision Conditions When the compressor motor does not start up even in forced startup mode Supposed Causes Compressor lock High differential pressure (0.
Troubleshooting for Outdoor Unit 7.5 SiUS181631EA Outdoor Fan Motor Abnormality E7 Error Code Method of Error Detection The error is determined according to the fan speed detected by Hall IC when the fan motor runs. Error Decision Conditions When the fan runs with speed less than a specified one for 6 seconds or more when the fan motor running conditions are met When the error is generated 4 times, the system shuts down.
SiUS181631EA 7.6 Troubleshooting for Outdoor Unit Moving Part of Electronic Expansion Valve (Y1E, Y3E) Abnormality Error Code E9 Method of Error Detection System checks if the connector is disconnected, and the detection is based on the continuity of electronic expansion valve coil. Error Decision Conditions No current is detected in the common (COM +) when power supply is ON.
Troubleshooting for Outdoor Unit SiUS181631EA Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Turn power supply off, and turn power supply on again. Return to normal? YES Could be other causes than malfunction (for example, noise etc.). NO Identify the defective electronic expansion valve (Y1E or Y3E) in monitor mode. (Refer to Note) The connector of main PCB (A1P) for electronic expansion valve is connected.
SiUS181631EA 7.7 Troubleshooting for Outdoor Unit Discharge Pipe Temperature Abnormality Error Code F3 Method of Error Detection The temperature detected by the discharge pipe thermistor determines the error.
Troubleshooting for Outdoor Unit 7.8 SiUS181631EA Refrigerant Overcharged Error Code F6 Method of Error Detection Excessive charging of refrigerant is detected during check operation by using outdoor temperature, outdoor heat exchanger temperature, and liquid pipe temperature. Error Decision Conditions When the amount of refrigerant, which is calculated during check operation by using outdoor temperature, outdoor heat exchanger temperature, and liquid pipe temperature, exceeds the standard.
SiUS181631EA 7.9 Troubleshooting for Outdoor Unit Outdoor Temperature Thermistor (R1T) Abnormality Error Code H9 Method of Error Detection The temperature detected by the outdoor temperature thermistor determines the error.
Troubleshooting for Outdoor Unit SiUS181631EA 7.10 Discharge Pipe Thermistor (R2T) Abnormality Error Code J3 Method of Error Detection The temperature detected by discharge pipe thermistor determines the error.
SiUS181631EA Troubleshooting for Outdoor Unit 7.11 Suction Pipe Thermistor (R3T, R5T) Abnormality Error Code J5 Method of Error Detection The temperature detected by the suction pipe thermistor determines the error.
Troubleshooting for Outdoor Unit SiUS181631EA 7.12 Outdoor Heat Exchanger Thermistor (R4T) Abnormality Error Code J6 Method of Error Detection The temperature detected by the outdoor heat exchanger thermistor determines the error.
SiUS181631EA Troubleshooting for Outdoor Unit 7.13 Outdoor Liquid Pipe Thermistor (R7T) Abnormality Error Code J7 Method of Error Detection The temperature detected by the outdoor liquid pipe thermistor determines the error.
Troubleshooting for Outdoor Unit SiUS181631EA 7.14 Subcooling Heat Exchanger Gas Pipe Thermistor (R6T) Abnormality Error Code J9 Method of Error Detection The temperature detected by subcooling heat exchanger gas pipe thermistor determines the error.
SiUS181631EA Troubleshooting for Outdoor Unit 7.15 High Pressure Sensor Abnormality Error Code JA Method of Error Detection The pressure detected by high pressure sensor determines the error.
Troubleshooting for Outdoor Unit SiUS181631EA 7.16 Low Pressure Sensor Abnormality Error Code JC Method of Error Detection The pressure detected by low pressure sensor determines the error.
SiUS181631EA Troubleshooting for Outdoor Unit 7.17 Outdoor Unit PCB Abnormality Error Code Method of Error Detection L1 The error is detected based on the current value during waveform output before starting compressor. The error is detected based on the value from current sensor during synchronous operation when starting the unit. Error Decision Conditions Overcurrent (OCP) flows during waveform output.
Troubleshooting for Outdoor Unit SiUS181631EA 7.18 Radiation Fin Temperature Rise Error Code L4 Method of Error Detection Fin temperature is detected by the thermistor of the radiation fin. Error Decision Conditions When the radiation fin temperature increases above 83°C (181.
SiUS181631EA Troubleshooting for Outdoor Unit 7.19 Inverter Compressor Abnormality L5 Error Code Method of Error Detection The error is detected from current flowing in the power transistor. Error Decision Conditions When an excessive current flows in the power transistor (Instantaneous overcurrent also causes activation.
Troubleshooting for Outdoor Unit SiUS181631EA 7.20 Inverter Current Abnormality Error Code L8 Method of Error Detection The error is detected by current flowing in the power transistor. Error Decision Conditions When overload in the compressor is detected. (Inverter secondary current 16.1 A) (1) 19.0 A and over continues for 5 seconds. (2) 16.1 A and over continues for 260 seconds.
SiUS181631EA Troubleshooting for Outdoor Unit 7.21 Compressor Start-up Error Error Code L9 Method of Error Detection The error is detected from current flowing in the power transistor. Error Decision Conditions Starting control of the compressor does not complete.
Troubleshooting for Outdoor Unit SiUS181631EA 7.22 High Voltage of Capacitor in Main Inverter Circuit Error Code P1 Method of Error Detection The error is detected according to the voltage waveform of main circuit capacitor built in the inverter.
SiUS181631EA Troubleshooting for Outdoor Unit 7.23 Radiation Fin Thermistor Abnormality Error Code P4 Method of Error Detection Resistance of radiation fin thermistor is detected when the compressor is not operating. Error Decision Conditions When the resistance value of thermistor becomes a value equivalent to open or short circuited status ★ Malfunction is not decided while the unit operation is continued. P4 is displayed by pressing the inspection button.
Troubleshooting for Outdoor Unit SiUS181631EA 7.24 Low Pressure Drop due to Refrigerant Shortage or Electronic Expansion Valve Abnormality Error Code U0 Method of Error Detection Refrigerant shortage is detected by discharge pipe thermistor and low pressure saturation temperature. Error Decision Conditions ★The error is not decided while the operation continues. Supposed Causes 252 Microcomputer judge and detect if the system is short of refrigerant.
SiUS181631EA Troubleshooting for Outdoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Low pressure is 0.25 MPa (84 ftAq) or less? NO YES Cooling? NO YES The voltage between the pins 2 and 3 of X18A is 1.0 VDC or less? (Low pressure sensor output voltage) ∗1 YES NO Is the suction pipe 1 temp. minus low pressure saturation temp.
Troubleshooting for Outdoor Unit SiUS181631EA 7.25 Power Supply Insufficient or Instantaneous Failure Error Code U2 Method of Error Detection Detection of voltage of main circuit capacitor built in the inverter and power supply voltage.
SiUS181631EA Troubleshooting for Outdoor Unit 7.26 Check Operation is not Conducted Error Code U3 Method of Error Detection Check operation is executed or not Error Decision Conditions When the unit starts operation without check operation Supposed Causes Check operation is not executed. Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Troubleshooting for Outdoor Unit SiUS181631EA 7.
SiUS181631EA Troubleshooting for Outdoor Unit 7.28 Excessive Number of Indoor Units Error Code UA Method of Error Detection A difference occurs in data by the type of refrigerant between indoor and outdoor units. The number of indoor units is out of the allowable range. Incorrect signals are transmitted among the indoor unit, BP unit, and outdoor unit. Error Decision Conditions The malfunction decision is made as soon as either of the abnormalities is detected.
Troubleshooting for Outdoor Unit SiUS181631EA 7.29 Address Duplication of Central Remote Controller Error Code UC Method of Error Detection The principal indoor unit detects the same address as that of its own on any other indoor unit. Error Decision Conditions The malfunction decision is made as soon as the abnormality is detected.
SiUS181631EA Troubleshooting for Outdoor Unit 7.30 Transmission Error between Centralized Remote Controller and Indoor Unit Error Code UE Method of Error Detection Microcomputer checks if transmission between indoor unit and centralized remote controller is normal.
Troubleshooting for Outdoor Unit SiUS181631EA Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Has an indoor unit once connected been remove or its address changed? YES Reset power supply simultaneously for all optional controllers for centralized control. NO Is the power supply turned on for indoor units displaying malfunction? NO Turn indoor unit's power supply.
SiUS181631EA Troubleshooting for Outdoor Unit 7.31 System is not Set yet Error Code UF Method of Error Detection On check operation, the number of indoor units in terms of transmission is not corresponding to that of indoor units that have made changes in temperature. Error Decision Conditions The malfunction is determined as soon as the abnormality aforementioned is detected through checking the system for any erroneous connection of units on the check operation.
Troubleshooting for Outdoor Unit SiUS181631EA 7.32 System Abnormality, Refrigerant System Address Undefined Error Code UH Method of Error Detection The system detects an indoor unit to which auto address has not been assigned. Error Decision Conditions The malfunction decision is made as soon as the abnormality is detected.
SiUS181631EA Troubleshooting for Outdoor Unit 7.33 Check for Outdoor Unit 7.33.1 Check for Causes of Rise in High Pressure Check No.30 Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. Local pressure rise Rise in high pressure High pipe resistance If the outdoor unit electronic expansion valve is throttled: (See ∗1.) Faulty high pressure control Faulty outdoor unit electronic expansion valve Stop valve closed ←Check to be sure the stop valve is open.
Troubleshooting for Outdoor Unit SiUS181631EA 7.33.2 Check for Causes of Drop in Low Pressure Check No.31 Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. In cooling (See ∗1.) Faulty low pressure control Abnormally low low-pressure (Low evaporating temperature) In both cooling and heating (See ∗2.) Faulty electronic expansion valve control If the outdoor unit electronic expansion valve excessively throttled: (See ∗3.
SiUS181631EA Troubleshooting for Outdoor Unit 7.33.3 Outdoor Fan Motor Connector Check Check No. 32 (1) Turn the power supply off. (2) With the fan motor connector disconnected, measure the resistance between each pin, then make sure that the resistance is more than the value mentioned in the following table.
Troubleshooting for Outdoor Unit SiUS181631EA 7.33.4 Check for the Factors of Overheat Operation Check No. 33 Identify the defective points referring to the failure factor analysis (FTA) as follows. Hot gas circuit clogging Faulty hot gas bypass control (∗1) Defective solenoid valve coil Defective solenoid valve body ←Check if coil resistance and insulation are normal.
SiUS181631EA Thermistor Resistance/Temperature Characteristics 8.
Thermistor Resistance/Temperature Characteristics SiUS181631EA Table 2 Applicable thermistor Outdoor unit FINTH: Radiation fin Outdoor unit R2T: Discharge pipe Thermistor temperature °C (°F) Resistance (kΩ) Resistance (kΩ) –30 (–22) 354.1 4759 –25 (–13) 259.7 3454 –20 (–4) 192.6 2534 –15 (5) 144.2 1877 –10 (14) 109.1 1404 –5 (23) 83.25 1059 0 (32) 64.10 806.5 5 (41) 49.70 618.9 10 (50) 38.85 478.8 15 (59) 30.61 373.1 20 (68) 24.29 292.9 25 (77) 19.41 231.
SiUS181631EA Pressure Sensor 9. Pressure Sensor 4.15 4.15 × VH – × 0.5 3.0 3.0 1.7 1.7 PL (MPa) = × VL – × 0.5 3.0 3.0 1 MPa = 334.6 ftAq PH (MPa) = Detected Pressure PH, PL (ftAq) (kgf/cm2) MPa 1673 51.0 5.0 1505 45.9 PH : High pressure PL : Low pressure VH : Output Voltage (High Side) (VDC) VL : Output Voltage (Low Side) (VDC) 4.5 High Pressure (PH) 1338 40.8 4.0 1171 35.7 3.5 1004 30.6 3.0 836 25.5 2.5 669 20.4 2.0 Low Pressure (PL) 502 15.3 1.5 335 10.2 1.0 167 0 –167 5.
Method of Replacing Inverter’s Power Transistors Modules SiUS181631EA 10.Method of Replacing Inverter’s Power Transistors Modules Check the power semiconductors mounted on the main PCB (A1P) with a multimeter. Items to be prepared z Multimeter : Prepare the digital type of multimeter with diode check function. Preparation z Turn OFF the power supply. Then, after a lapse of 10 minutes or more, make measurement of resistance. z To make measurement, disconnect all connectors and terminals.
SiUS181631EA Method of Replacing Inverter’s Power Transistors Modules Power module checking When using the digital type of multimeter, make measurement in diode check mode. Multimeter terminal + C+ Criterion Remark Not less than 0.3 V (including ∞)∗ It may take time to determine the voltage due to capacitor charge or else. – U V W U C– Not less than 0.3 V (including ∞)∗ C+ 0.3 ~ 0.7 V (including ∞)∗ U 0.3 ~ 0.
SiUS181631EA Part 9 Appendix 1. Piping Diagrams......................................................................................273 1.1 Outdoor Unit ............................................................................................. 273 1.2 Branch Provider (BP) Unit ........................................................................ 274 1.3 Indoor Unit................................................................................................ 275 2. Wiring Diagrams.................
SiUS181631EA Piping Diagrams 1. Piping Diagrams 1.
Piping Diagrams 1.
SiUS181631EA 1.
Piping Diagrams SiUS181631EA FTXS15/18LVJU FTXS24LVJU INDOOR UNIT INDOOR UNIT 5/16 CuT 5/16 CuT DISTRIBUTOR DISTRIBUTOR HEAT EXCHANGER FIELD PIPING 1/4 CuT CROSS FLOW FAN HEAT EXCHANGER THERMISTOR ON HEAT EXCH. M THERMISTOR ON HEAT EXCH.
SiUS181631EA Piping Diagrams CDXS24LVJU FVXS09/12NVJU INDOOR UNIT MUFFLER ASSY 9/32 CuT HEAT EXCHANGER 1/4 CuT 1/4 CuT 1/4 CuT INDOOR UNIT (3/8CuT) THERMISTOR ON HEAT EXCH. HEAT EXCHANGER M FIELD PIPING (1/4 CuT) FIELD PIPING (1/4CuT) SIROCCO FAN THERMISTOR ON HEAT EXCH.
Wiring Diagrams SiUS181631EA 2. Wiring Diagrams 2.
SiUS181631EA 2.2 Wiring Diagrams Branch Provider (BP) Unit BPMKS048A2U R1T R2T R3T R4T (DLA) (DGA) (DLB) (DGB) t˚ t˚ t˚ BLK BLK BLK BLK BLU BLU BLU BLU t˚ FIELD WIRING OFF 1 2 DS2 3 4 12 X22A (BLU) X3M INDOOR ROOM A 1 1 2 2 3 3 X4M INDOOR ROOM B 1 1 2 2 3 3 H1P H2P H3P H4P H5P TRANSMISSION CIRCUIT LEDA LED1 LED2 LED3 LED4 1 X90A (WHT) F2U T, 3.
Wiring Diagrams 2.
SiUS181631EA Wiring Diagrams CTXS07JVJU, CTXS09/12HVJU FIELD WIRING. PCB3 S27 S26 PCB1 1 H1 ~ ~ RECTIFIER X1M Fu 3.15A BLK 1 WHT 2 RED 3 H2 t˚ R1T H3 TRANSMISSION CIRCUIT S38 GRN / 2 3 CAUTION YLW NOTE THAT OPERATION WILL FG RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS PCB4 S37 S21 LED1 LED2 LED3 H1P H2P H3P 7 TURNED OFF AND THEN BACK S1 ON AGAIN.
Wiring Diagrams SiUS181631EA 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 GRN/YLW H3 TRANSMISSION CIRCUIT 9 BLK SW1 CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
SiUS181631EA Wiring Diagrams FTXS15/18/24LVJU 1 PCB3 S49 1 LED1 H1P PCB1 S46 1 BLK FU1 F1U BLK ~ BLK H1 3.15A C102 BLK LED2 H2P X1M V1 BLK H2 MR10 WHT 2 RED 3 C101 BLK 9 SW1 t˚ FU2 F2U HA RTH1 R1T 7 S1 RED 3.
Wiring Diagrams SiUS181631EA FDXS09/12LVJU, CDXS15/18/24LVJU A1P H1 A2P F1U 3.15A V1TR LED LED LED H1P H2P H3P S1 1 S26 1 H2 FOR ( TERMINAL CENTRALIZED CONTROL ) S21 S1W SIGNAL RECEIVER 10 2 RTH1 1 3 1 RED S7 1 BRN BRN R1T t° 2 RED 3 INDOOR C1 : PROTECTIVE GROUND C1 : CAPACITOR (M1F) F1U : FUSE PPL BLU 1 2 → 3 OUTDOOR GRN GRN/YLW FIELD WIRING. CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
SiUS181631EA 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.
Wiring Diagrams SiUS181631EA 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.
SiUS181631EA Operation Limit 3. Operation Limit RMXS48LVJU Heating Cooling 60 120 115 Continuous operation 41 Warming up period 40 Outdoor temp. (˚FWB) 60 Pull-down period 80 50 Continuous operation Outdoor temp. (˚FDB) 104 23 5 57 73 82 Indoor temp. (˚FWB) Notes : The graphs are based on the following conditions. • Equivalent piping length 16.4ft From outdoor unit to BP unit 9.8ft From BP unit to each indoor units 0ft • Level difference High • Air flow rate Appendix 50 57 Indoor temp.
Revision History Month / Year Version 09 / 2016 SiUS181631E 03 / 2017 SiUS181631EA Revised contents First edition Model addition: FFQ18Q2VJU
z 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. z Ask a qualified installer or contractor to install this product.
