SiUS121736EA Service Manual Multi-Split Type Air Conditioners 2MXS-N, 3/4MXS-R Series [Applied Models] z Inverter Multi : Heat Pump
SiUS121736EA Multi-Split Type Air Conditioners 2MXS-N, 3/4MXS-R Series zHeat Pump Indoor Unit CTXG09QVJUW CTXG09QVJUS CTXG12QVJUW CTXG12QVJUS CTXG18QVJUW CTXG18QVJUS CDXS07LVJU FDXS09LVJU FDXS12LVJU CDXS15LVJU CDXS18LVJU CDXS24LVJU FDMQ09RVJU FDMQ12RVJU FDMQ15RVJU FDMQ18RVJU FDMQ24RVJU FTXR09TVJUW FTXR09TVJUS FTXR12TVJUW FTXR12TVJUS FTXR18TVJUW FTXR18TVJUS FVXS09NVJU FVXS12NVJU FVXS15NVJU FVXS18NVJU FFQ09Q2VJU FFQ12Q2VJU FFQ15Q2VJU FFQ18Q2VJU CTXS07LVJU FTXS09LVJU FTXS12LVJU FTXS15LVJU FTXS18LVJU FTX
SiUS121736EA 1. Safety Cautions......................................................................................... vii 1.1 Warnings and Cautions Regarding Safety of Workers................................ vii 1.2 Warnings and Cautions Regarding Safety of Users.....................................ix 2. Icons Used ................................................................................................ xii Part 1 List of Functions ...............................................................
SiUS121736EA 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 NIGHT SET Mode ...................................................................................... 58 ECONO Operation ..................................................................................... 59 2-Area INTELLIGENT EYE Operation ....................................................... 60 INTELLIGENT EYE Operation ................................................................... 62 POWERFUL Operation ......................................
SiUS121736EA Part 6 Service Diagnosis.............................................................. 131 1. General Problem Symptoms and Check Items .......................................133 2. Troubleshooting with LED .......................................................................134 2.1 Indoor Unit................................................................................................ 134 2.2 Outdoor Unit ....................................................................................
SiUS121736EA 7.11 7.12 7.13 7.14 7.15 7.16 7.17 7.18 7.19 7.20 Four Way Valve Abnormality.................................................................... 193 Discharge Pipe Temperature Control....................................................... 195 High Pressure Control in Cooling ............................................................. 196 Compressor Sensor System Abnormality ................................................ 197 Position Sensor Abnormality .....................................
SiUS121736EA 3. Operation Limit........................................................................................
Safety Cautions SiUS121736EA 1. Safety Cautions Be sure to read the following safety cautions before conducting repair work. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer. This manual is for the person in charge of maintenance and inspection. Caution Items Pictograms 1.1 The caution items are classified into Warning and Caution.
SiUS121736EA Safety Cautions Warning Be sure to discharge the capacitor completely before conducting repair work. The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit. A charged capacitor may cause an electrical shock. Do not turn the air conditioner on or off by plugging in or unplugging the power cable. Plugging in or unplugging the power cable to operate the equipment may cause an electrical shock or fire.
Safety Cautions SiUS121736EA Caution Be sure to check that the refrigerating cycle section has cooled down enough before conducting repair work. Working on the unit when the refrigerating cycle section is hot may cause burns. Conduct welding work in a well-ventilated place. Using a welder in an enclosed room may cause oxygen deficiency. 1.2 Warnings and Cautions Regarding Safety of Users Warning Do not store the equipment in a room with fire sources (e.g.
SiUS121736EA Safety Cautions Warning Do not damage or modify the power cable. Damaged or modified power cables may cause an electrical shock or fire. Placing heavy items on the power cable, or heating or pulling the power cable may damage it. Do not mix air or gas other than the specified refrigerant (R-32 / R-410A / R22) in the refrigerant system. If air enters the refrigerant system, an excessively high pressure results, causing equipment damage and injury.
Safety Cautions SiUS121736EA Caution If the installation platform or frame has corroded, replace it. A corroded installation platform or frame may cause the unit to fall, resulting in injury. Check the earth / grounding, and repair it if the equipment is not properly earthed / grounded. Improper earth / grounding may cause an electrical shock. Be sure to measure insulation resistance after the repair, and make sure that the resistance is 1 MΩ or higher. Faulty insulation may cause an electrical shock.
SiUS121736EA Icons Used 2. Icons Used The following icons are used to attract the attention of the reader to specific information. Icon Type of Information Warning Description A Warning is used when there is danger of personal injury. Warning Caution A Caution is used when there is danger that the reader, through incorrect manipulation, may damage equipment, lose data, get an unexpected result or have to restart (part of) a procedure.
SiUS121736EA Part 1 List of Functions 1. RA Indoor Unit............................................................................................. 2 2. SA Indoor Unit............................................................................................. 7 3. Outdoor Unit................................................................................................
SiUS121736EA RA Indoor Unit 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 Air-purifying filter CTXG09/12/18QVJUW(S) FTXR09/12/18TVJUW(S) Category CTXG09/12/18QVJUW(S) FTXR09/12/18TVJUW(S) 1.
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 CTXS07LVJU Category SiUS121736EA CTXS07LVJU RA Indoor Unit Functions Air-purifying filter — Titanium apatite deodorizing filter z — Longlife filter (option) — PAM control — Air filter (prefilter) z Oval scroll compressor — Wipe-clean flat panel
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 Air-purifying filter FTXS09/12/15/18/24LVJU Category RA Indoor Unit FTXS09/12/15/18/24LVJU SiUS121736EA — Titanium apatite deodorizing filter z — Longlife filter (option) — PAM control — Air filter (prefilter) z Oval scroll compressor —
Basic Functions Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience Functions Inverter (with inverter power control) z z Operation limit for cooling — — Operation limit for heating — — Health & Cleanliness Functions Air-purifying filter — — Titanium apatite deodorizing filter — — Longlife filter (option) — — PAM control — — Air filter (prefilter) z z Oval scroll compressor — — Wipe-clean flat panel — — Swing compressor — — Washable grille
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 Air-purifying filter FVXS09/12/15/18NVJU Category RA Indoor Unit FVXS09/12/15/18NVJU SiUS121736EA — Titanium apatite deodorizing filter z — Longlife filter (option) — PAM control — Air filter (prefilter) z Oval scroll compressor — Wipe
SA Indoor Unit SiUS121736EA Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience z z Operation limit for cooling — — Air-purifying filter — — Titanium apatite deodorizing filter — — z Category Health & Cleanliness Functions Operation limit for heating — — Silver ion anti-bacterial drain pan z PAM control — — Longlife filter (option) z z Oval scroll compressor — — Air filter — — Swing compressor — — Filter cleaning indicator z z Rotary com
Compressor Comfortable Airflow Comfort Control FFQ09/12/15/18Q2VJU with BYFQ60C2W1W(S) — — Titanium apatite deodorizing filter — — — Longlife filter (option) z z — Air filter — — z z Operation limit for cooling — — Operation limit for heating — PAM control — Category Health & Cleanliness Functions Standby electricity saving — — Filter cleaning indicator z z Oval scroll compressor — — Wipe-clean flat panel — — Swing compressor — — Washable grille z z Rotary comp
Outdoor Unit SiUS121736EA Basic Functions Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience Inverter (with inverter power control) Operation limit for cooling z Operation limit for heating Refer to P. 267 PAM control z z Health & Cleanliness Functions 3MXS24RMVJU(A) 4MXS36RMVJU(A) z Category 2MXS18NMVJU(A) Functions 3MXS24RMVJU(A) 4MXS36RMVJU(A) Category 2MXS18NMVJU(A) 3.
SiUS121736EA Part 2 Specifications 1. RA Indoor Unit...........................................................................................11 2. SA Indoor Unit...........................................................................................19 3. Outdoor Unit..............................................................................................
RA Indoor Unit SiUS121736EA 1. RA Indoor Unit 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 0.13 - 0.
SiUS121736EA RA Indoor Unit 60 Hz, 208 - 230 V CTXG18QVJUW Model Cooling Rated Capacity Front Panel Color Airflow Rate Fan Heating H M L SL Type Motor Output Speed cfm (m³/min) W Steps A W % in. (mm) in. (mm) Lbs (kg) Lbs (kg) 364 (10.3) 286 (8.1) 233 (6.6) 219 (6.2) Heating 18 kBtu/h Class Silver 438 (12.4) 350 (9.9) 265 (7.5) 212 (6) Cross Flow Fan 29 5 Steps, Quiet, Auto Right, Left, Horizontal, Downward Removable, Washable, Mildew Proof 0.14 - 0.14 0.21 - 0.21 28 - 28 42 - 42 96.1 - 87.
RA Indoor Unit SiUS121736EA 60 Hz, 208 - 230 V FTXR12TVJUW Model Cooling 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) 335 (9.5) 219 (6.2) 169 (4.8) 131 (3.7) 395 (11.2) 290 (8.2) 226 (6.4) 131 (3.7) Cross Flow Fan 29 5 Steps, Quiet, Auto Right, Left, Horizontal, Downward Removable, Washable, Mildew Proof 0.13 - 0.12 0.19 - 0.17 26 - 26 38 - 38 96.1 - 94.2 96.1 - 97.
SiUS121736EA RA Indoor Unit 60 Hz, 208 - 230 V CTXS07LVJU Model Cooling Heating Rated Capacity Front Panel Color Airflow Rate Fan 7 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
RA Indoor Unit SiUS121736EA 60 Hz, 208 - 230 V FTXS15LVJU Model Cooling Rated Capacity Front Panel Color Airflow Rate Fan FTXS18LVJU Heating 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 Drain Dra
SiUS121736EA RA Indoor Unit 60 Hz, 208 - 230 V CDXS07LVJU Model Cooling 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. W Steps A W % in. (mm) in.
RA Indoor Unit SiUS121736EA 60 Hz, 208 - 230 V CDXS18LVJU Model Cooling 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.
SiUS121736EA RA Indoor Unit 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 - 0.14 15 - 15 17 - 17 51.5 - 50.2 54.
SA Indoor Unit SiUS121736EA 2. SA Indoor Unit 60 Hz, 208 - 230 V FDMQ09RVJU Model FDMQ12RVJU Cooling Rated Capacity Casing Color Dimensions (H × W × D) in. (mm) Type Coil Rows × Stages × Fin per Inch Face Area ft² (m²) Type Motor Output W Airflow Rate cfm Fan H/M/L (m³/min) inH2O External Static Pressure 1 Pa Sound Pressure Level dB(A) Sound Power Level dB(A) Air Filter 2 Weight (Mass) Lbs (kg) Liquid in. (mm) Piping Gas in. (mm) Connections Drain in.
SiUS121736EA SA Indoor Unit 60 Hz, 208 - 230 V FDMQ24RVJU Model Cooling Rated Capacity Casing Color Dimensions (H × W × D) in. (mm) Type Coil Rows × Stages × Fin per Inch Face Area ft² (m²) Type Motor Output W Airflow Rate cfm Fan H/M/L (m³/min) External Static Pressure 1 Sound Pressure Level Sound Power Level Air Filter 2 Weight (Mass) Liquid Piping Gas Connections Drain Remote Controller Wired (Option) Wireless Drawing No.
SA Indoor Unit SiUS121736EA 60 Hz, 208 - 230 V FFQ09Q2VJU Model Cooling Rated Capacity Decoration Panel (1) Decoration Panel (2) Airflow Rate Fan Model Color Dimensions (H × W × D) Weight (Mass) Model Color Dimensions (H × W × D) Weight (Mass) H M L Type Motor Output Speed Air Direction Control Running Current (Rated) Power Consumption (Rated) Power Factor (Rated) Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure H/M/
SiUS121736EA Outdoor Unit 3. Outdoor Unit 60 Hz, 208 - 230 V 2MXS18NMVJU Model COP EER SEER / HSPF Casing Color Compressor Refrigerant Oil Refrigerant Airflow Rate Fan W/W Btu/W·h Type Model Motor Output Model Charge Type Charge H M L H M L Type Motor Output Running Current Power Consumption Starting Current Dimension (H × W × D) Packaged Dimension (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure Level Liquid Piping Gas Connections Drain Heat Insulation No.
Outdoor Unit SiUS121736EA 60 Hz, 208 - 230 V 3MXS24RMVJU Model COP EER SEER / HSPF Casing Color Compressor Refrigerant Oil Refrigerant Airflow Rate Fan W/W Btu/W·h Type Model Motor Output Model Charge Type Charge H M L H M L Type Motor Output Running Current Power Consumption Starting Current Dimension (H × W × D) Packaged Dimension (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure Level Sound Power Liquid Piping Gas Connections Drain Heat Insulation W oz (L) Lbs (kg) cfm m³/min
SiUS121736EA Outdoor Unit 60 Hz, 208 - 230 V 4MXS36RMVJU Model COP EER SEER / HSPF Casing Color Compressor Refrigerant Oil Refrigerant Airflow Rate Fan W/W Btu/W·h Type Model Motor Output Model Charge Type Charge H M L H M L Type Motor Output Running Current Power Consumption Starting Current Dimension (H × W × D) Packaged Dimension (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure Level Sound Power Liquid Piping Gas Connections Drain Heat Insulation W oz (L) Lbs (kg) cfm m³/min
SiUS121736EA Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit.................................................................................................26 1.1 1.2 1.3 1.4 1.5 1.6 1.7 CTXG09/12/18QVJUW(S), FTXR09/12/18TVJUW(S) ............................... 26 CTXS07LVJU, FTXS09/12LVJU ................................................................ 28 FTXS15/18/24LVJU ...................................................................................
SiUS121736EA Indoor Unit 1. Indoor Unit 1.
Indoor Unit SiUS121736EA Display/Signal Receiver PCB (A2P) 1) 2) 3) 4) 5) 6) S51 S52 S1W H1P H2P JA Connector for control PCB (A1P) Connector for room temperature thermistor Indoor unit ON/OFF button LED for operation (multi-color) LED for INTELLIGENT EYE (green) Address setting jumper ∗ Refer to page 234 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.
SiUS121736EA 1.2 Indoor Unit 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 234 for details.
Indoor Unit SiUS121736EA Signal Receiver PCB (PCB2) 1) S48 Connector for control PCB (PCB1) S48 3P210728-1 Display PCB (PCB3) 1) 2) 3) 4) 5) 6) S49 SW1 LED1 (H1P) LED2 (H2P) LED3 (H3P) RTH1 (R1T) Connector for control PCB (PCB1) Indoor unit ON/OFF 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
SiUS121736EA 1.
Indoor Unit SiUS121736EA Signal Receiver PCB (PCB2) 1) S48 Connector for control PCB (PCB1) S48 3P224121-1 Display PCB (PCB3) 1) 2) 3) 4) 5) 6) S49 SW1 LED1 (H1P) LED2 (H2P) LED3 (H3P) RTH1 (R1T) Connector for control PCB (PCB1) Indoor unit ON/OFF 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
SiUS121736EA 1.4 Indoor Unit CDXS07/15/18/24LVJU, FDXS09/12LVJU Control PCB (A1P) 1) 2) 3) 4) 5) 6) 7) 8) S1 S7 S21 S26 S32 H1, H2, H3 FG (GND) JA Connector for AC fan motor Connector for AC fan motor (Hall IC) Connector for centralized control (HA) Connector for display/signal receiver PCB (A2P) Connector for indoor heat exchanger thermistor Connector for terminal block Connector for terminal block (ground) Address setting jumper ∗ Refer to page 234 for details.
Indoor Unit SiUS121736EA Display/Signal Receiver PCB (A2P) 1) 2) 3) 4) 5) S1 SW1 (S1W) LED2 (H2P) LED3 (H3P) RTH1 (R1T) Connector for control PCB (A1P) Indoor unit ON/OFF 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: 33 The symbols in the parenthesis are the names on the appropriate wiring diagram.
SiUS121736EA 1.
Indoor Unit SiUS121736EA Sensor PCB (PCB1) 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 236 for details. ∗ Keep the other switches as factory setting. Switch for airflow selection ∗ Refer to page 53 for details.
SiUS121736EA 1.
Indoor Unit Indoor Fan PCB (A2P) SiUS121736EA 1) 2) 3) 4) 5) 6) 7) X3A X6A X8A X10A F2U F4U HAP Connector for control PCB (A1P) Connector for reactor Connector for indoor fan motor Connector for terminal block (for power supply) Fuse (5 A, 250 V) Fuse (6.
SiUS121736EA 1.
Sensor Kit for FFQ Series SiUS121736EA 2. Sensor Kit for FFQ Series 2.
SiUS121736EA Wired Remote Controller 3. Wired Remote Controller 3.
Wireless Remote Controller Receiver for FDMQ series SiUS121736EA 4. Wireless Remote Controller Receiver for FDMQ series 4.1 BRC082A43 Wireless Remote Controller PCB 1) SS1 2) SS2 3) P1, P2 MAIN/SUB setting switch ∗ Refer to page 243 for details. Address setting switch ∗ Refer to page 243 for details.
SiUS121736EA Wireless Remote Controller Kit for FFQ Series 5. Wireless Remote Controller Kit for FFQ Series 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 246 for details. Address setting switch ∗ Refer to page 246 for details.
Outdoor Unit SiUS121736EA 6. Outdoor Unit Main PCB (PCB1) 1) S 2) S15 3) S20 (white) 4) S21 (red) 5) S22 (blue) 6) S23 (yellow) 7) S40 8) S70 9) S80 10) S90 11) S92 12) S93 13) S201, S202 14) HL1, HN1 15) E1, E2 16) U, V, W 17) FU1, FU2 18) FU3 19) V2, V3, V401 43 Connector for terminal board (indoor - outdoor transmission) Connector for COOL/HEAT mode lock ∗ Refer to page 231 for details.
SiUS121736EA Outdoor Unit E1, E2 HL1, HN1 V401 FU1 V3 V2 FU3 S S15 S23 S22 S21 S20 S201 U, V, W S80 FU2 S70 S40 S93 S90 S92 S202 2P350358-10 2P350358-11 Printed Circuit Board Connector Wiring Diagram 44
Outdoor Unit Service Monitor PCB (PCB2) SiUS121736EA 1) 2) 3) 4) S501, S502 LED A LED1 - LED5 SW1 5) SW2 6) SW3 7) SW4 8) SW6-1 Connector for main PCB (PCB1) LED for service monitor (green) LED for service monitor (red) Forced operation ON/OFF switch ∗ Refer to page 222 for details. Operation mode switch ∗ Refer to page 222 for details. Wiring error check switch ∗ Refer to page 223 for details. Priority room setting switch ∗ Refer to page 230 for details.
SiUS121736EA Part 4 Functions and Control 1. Common Functions ...................................................................................48 1.1 Temperature Control .................................................................................. 48 1.2 Frequency Principle.................................................................................... 48 2. RA Indoor Unit Functions ..........................................................................50 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.
SiUS121736EA 4.12 Low Hz High Pressure Limit ..................................................................... 103 4.13 Electronic Expansion Valve Control ......................................................... 104 4.14 Malfunctions .............................................................................................
SiUS121736EA Common Functions 1. Common Functions 1.1 Temperature Control Definitions of Temperatures The definitions of temperatures are classified as following.
Common Functions Inverter Principle SiUS121736EA To regulate the capacity, a frequency control is needed. The inverter makes it possible to control the rotation speed of the compressor. The following table explains the inverter principle: Phase 1 2 Description The supplied AC power source is converted into the DC power source for the present. The DC power source is reconverted into the three phase AC power source with variable frequency.
SiUS121736EA RA Indoor Unit Functions 2. RA Indoor Unit Functions 2.1 Airflow Direction Control Applicable Models CTXG09/12/18QVJUW(S) FTXR09/12/18TVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU FVXS09/12/15/18NVJU Power-Airflow (Dual) Flap(s) The large flap sends a large volume of air downward to the floor and provides an optimum control in cooling, dry and heating operation. Cooling/Dry During cooling or dry operation, the flap retracts into the indoor unit.
RA Indoor Unit Functions SiUS121736EA CTXS, FTXS Series Flap (up and down) Cooling/Dry 07/09/12 class Heating 5˚ 15˚ 30˚ 35˚ 55˚ 45˚ (R13527) 15/18/24 class Louver (right and left) Fan 15˚ 30˚ 30˚ 65˚ 70˚ 80˚ (R11402) ˚ ˚ 45 (R11404) (R11403) 15˚ 30˚ 25˚ 60˚ 50˚ 45 65˚ 40˚ 75˚ 70˚ (R9304) (R9303) 25˚ 75˚ 70˚ (R9305) 45˚ 45˚ (R9306) FVXS Series Flap (up and down) 40 25˚ ˚ ˚ 90 90 Upward airflow limit OFF Heating ˚ Cooling/Dry 20˚ 90 ˚ ˚ 90 Upward airflow limit
SiUS121736EA 3-D Airflow RA Indoor Unit Functions CTXG, FTXR, CTXS, FTXS Series Alternative repetition of vertical and horizontal swing motions enables uniform air-conditioning of the entire room. When the horizontal swing and vertical swing are both set to automatic operation, the airflow becomes 3-D airflow. The horizontal and vertical swing motions are alternated and the airflow direction changes in the order shown in the following diagram. (1) The louvers move from the right to the left.
RA Indoor Unit Functions Airflow Selection Setting SiUS121736EA FVXS Series Airflow direction can be set with the airflow selection switch. Open the front panel. Front panel Air is blown from the upper outlet only. The blow pattern is automatically decided depending on mode and conditions. (Recommended and factory set.) (R17866) Caution: Before opening the front panel, be sure to stop the operation and turn the breaker off.
SiUS121736EA 2.2 RA Indoor Unit Functions Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature. Automatic Fan Speed Control In automatic fan speed control, the step SL is not available.
RA Indoor Unit Functions 2.3 SiUS121736EA Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and FAN setting buttons are inoperable. Details The microcomputer automatically sets the temperature and airflow rate. The difference between the room thermistor temperature at start-up and the target temperature is divided into two zones.
SiUS121736EA 2.4 RA Indoor Unit 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.
RA Indoor Unit Functions SiUS121736EA 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 (81.5°F): Switch to cooling 2.
SiUS121736EA RA Indoor Unit Functions CTXS, FTXS series Room thermistor temperature – target temperature OFF Zone A Zone B 2.0˚C (3.6˚F) 2.0˚C (3.6˚F) 1.5˚C (2.7˚F) Zone C 1.0˚C (1.8˚F) 0.5˚C (0.9˚F) ON (R24033) 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 48 for details. 2.
RA Indoor Unit Functions 2.7 SiUS121736EA ECONO Operation Outline ECONO operation reduces the maximum operating current and the power consumption. This operation is particularly convenient for energy-saving. It is also a major bonus when breaker capacity does not allow the use of multiple electrical devices and air conditioners. It can be easily activated by pressing ECONO button on the wireless remote controller. Details When this function is activated, the maximum capacity also decreases.
SiUS121736EA 2.8 RA Indoor Unit Functions 2-Area INTELLIGENT EYE Operation Applicable Models CTXG09/12/18QVJUW(S) FTXR09/12/18TVJUW(S) Outline The following functions can be performed by the microcomputer with a motion sensor. 1. Reduction of the capacity when there is nobody in the room in order to save electricity (energy saving operation) 2. Dividing the room into plural areas and detecting presence of humans in each area.
RA Indoor Unit Functions SiUS121736EA 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.
SiUS121736EA 2.9 RA Indoor Unit Functions INTELLIGENT EYE Operation Applicable Models CTXS07LVJU FTXS09/12/15/18/24LVJU Outline The microcomputer detects the presence of humans in the room with a motion sensor and reduces the capacity when there is nobody in the room in order to save electricity. Details 1. INTELLIGENT EYE detection method Sampling (20 msec.) Motion sensor output 1 sec.
RA Indoor Unit Functions SiUS121736EA 2.10 POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, the air conditioner can be operated by increasing the indoor fan rotating speed and the compressor frequency. Details When POWERFUL button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes. Operation mode COOL Fan speed Target temperature H tap + A rpm DRY Dry rotating speed + A rpm 18°C (64.
SiUS121736EA RA Indoor Unit Functions 2.11 Multi-Monitor Lamp/TIMER Lamp Applicable Models CTXG09/12/18QVJUW(S) FTXR09/12/18TVJUW(S) Features Current operation mode is displayed in color of the lamp of the indoor unit. Operating status can be monitored even in automatic operation in accordance with the actual operation mode. Multi-monitor lamp/ TIMER lamp (R19925) The lamp color changes according to the operation. ∗ AUTO ........................................................Red/Blue ∗ DRY ........
RA Indoor Unit Functions SiUS121736EA 2.12 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 adjust the clock to the present time. Holding down SELECT or SELECT button increases or decreases the time display rapidly. 5. Press CLOCK button to set the clock.
SiUS121736EA RA Indoor Unit Functions 2.13 WEEKLY TIMER Operation Applicable Models CTXG09/12/18QVJUW(S) FTXR09/12/18TVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU FVXS09/12/15/18NVJU Outline Up to 4 timer settings can be saved for each day of the week (up to 28 settings in total). The 3 items: ON/OFF, temperature, and time can be set. Details The illustrations are for CTXG, FTXR series as representative.
RA Indoor Unit Functions SiUS121736EA To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. program 1 program 2 ON OFF ON 8:30 17:30 [Monday] program 3 77˚F (25˚C) 6:00 program 4 OFF 81˚F (27˚C) 22:00 Setting Displays Day and number 1. Press ON/OFF Time Temperature . • The day of the week and the reservation number of the current day will be displayed. • 1 to 4 settings can be made per day. 2.
SiUS121736EA RA Indoor Unit Functions 6. Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10-minute intervals. • To return to the ON/OFF TIMER mode setting, press . • Proceed to STEP 9 when setting the OFF TIMER. 7. Press . • The time will be set. •“ ” and the temperature blink. 8. Press to select the desired temperature. • The temperature can be set between 50˚F (10˚C) and 90˚F (32˚C).
RA Indoor Unit Functions SiUS121736EA Copy mode • A reservation made once can be copied to another day of the week. The whole reservation of the selected day of the week will be copied. program 1 program 2 program 3 ON [Monday] OFF ON 8:30 17:30 77˚F (25˚C) 6:00 program 4 OFF 81˚F (27˚C) 22:00 COPY program 1 [Tuesday] to [Friday] program 2 program 3 ON OFF ON 8:30 17:30 77˚F (25˚C) 6:00 program 4 OFF 81˚F (27˚C) 22:00 Setting Displays Confirmation Copy Paste Normal 1. Press .
SiUS121736EA RA Indoor Unit Functions Confirming a reservation • The reservation can be confirmed. Setting Displays Normal Confirmation 1. Press . • The day of the week and the reservation number of the current day will be displayed. 2. Press to select the day of the week and the reservation number to be confirmed. • Pressing displays the reservation details. • To change the confirmed reserved settings, select the reservation number and press . The mode is switched to setting mode.
RA Indoor Unit Functions SiUS121736EA 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.
SiUS121736EA RA Indoor Unit Functions 2.14 Other Functions 2.14.1 Hot-Start Function In order to prevent the cold air blast that normally occurs when heating operation starts, the temperature of the indoor heat exchanger is detected, and the airflow is either stopped or significantly weakened resulting in comfortable heating. Note: The cold air blast is prevented using similar control when defrost control starts or when the thermostat is turned ON. 2.14.
RA Indoor Unit Functions SiUS121736EA FVXS Series ON/OFF button (R23926) 2.14.4 Auto-restart Function If a power failure (even a momentary one) occurs during the operation, the system restarts automatically in the same conditions as before when the power supply is restored to the conditions prior to the power failure. Note: 73 It takes 3 minutes to restart the operation because the 3-minute standby function is activated.
SiUS121736EA SA Indoor Unit Functions 3. SA Indoor Unit Functions 3.1 Airflow Direction Control Applicable Models FFQ09/12/15/18Q2VJU Outline There are two types of airflow direction settings. Automatic swing setting The flaps automatically oscillate up and down. Indoor unit (Automatic swing) (Automatic swing) (R24069) Airflow direction fixed setting You can select from one of the fixed directions. The display of the remote controller and the actual angle of the flap do not match.
SA Indoor Unit Functions 3.2 SiUS121736EA Fan Speed Control for Indoor Unit With Wired Remote Controller (BRC1E73) To change the fan speed, press Fan Speed button and select the fan speed from Low/Medium/High/Auto. Auto cannot be selected if the indoor unit does not have Auto Fan speed function. The system may change the fan speed automatically for equipment protection purposes. The system may turn off the fan when the room temperature is satisfied.
SiUS121736EA 3.3 SA Indoor Unit Functions Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and FAN setting buttons are inoperable. Details The microcomputer automatically sets the temperature and airflow rate. The difference between the room thermistor temperature at start-up and the target temperature is divided into two zones.
SA Indoor Unit Functions 3.4 SiUS121736EA 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.
SiUS121736EA SA Indoor Unit Functions 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.
SA Indoor Unit Functions 3.5 Outline SiUS121736EA Schedule TIMER Operation (With Wired Remote Controller BRC1E73) Day settings are selected from 4 patterns: 7 Days Weekday/Sat/Sun Weekday/Weekend Everyday Up to 5 actions can be set for each day. Details Set the startup time and operation stop time. ON: Startup time, cooling and heating temperature setpoints can be configured. OFF: Operation stop time, cooling and heating setback temperature setpoints can be configured.
SiUS121736EA SA Indoor Unit Functions 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.
SA Indoor Unit Functions SiUS121736EA 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.
SiUS121736EA SA Indoor Unit Functions 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.
SA Indoor Unit Functions 3.6 SiUS121736EA Setback Function (With Wired Remote Controller BRC1E73) Applicable Models FFQ09/12/15/18Q2VJU Outline The Setback function can be used to maintain the space temperature in an assigned range for an unoccupied period. Details The setback icon flashes on the LCD of wired remote controller when the unit is turned on by the setback control.
SiUS121736EA SA Indoor Unit Functions 3.7.2 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.
SA Indoor Unit Functions SiUS121736EA 3.7.4 If the Float Switch Turns OFF and ON Continuously, or the Float Switch Turns OFF While AF Displayed ∗1 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.
SiUS121736EA 3.9 SA Indoor Unit Functions Presence and Floor Sensors (Option) Applicable Models FFQ09/12/15/18Q2VJU Outline With the human presence signal and the floor temperature signal from the optional sensor kit, the system provides the energy saving control, or the comfortable temperature control and airflow direction control preventing the direct draft to the human.
SA Indoor Unit Functions SiUS121736EA 2. Auto-setback by sensor (with presence sensor) After pre-determined time has elapsed without detection of human presence, the unit automatically shifts the target temperature gradually for energy saving. The target temperature displayed on the remote controller remains same as the initial set value during the above change of target temperature.
SiUS121736EA SA Indoor Unit Functions 3. Auto-off by sensor (with presence sensor) After pre-determined time has elapsed without detection of human presence, the unit automatically stops operation. The auto-off time can be set between 1- 24 hours by the hour. Once the unit stops operation by auto-off function, the system would not restart even if the human is detected again.
SA Indoor Unit Functions SiUS121736EA 3.10 Other Functions 3.10.1 Signal Receiving Sign When the indoor unit receives a signal from the remote controller, the unit emits a signal receiving sound. 3.10.2 Auto-restart Function If a power failure (even a momentary one) occurs during the operation, the system restarts automatically in the same conditions as before when the power supply is restored to the conditions prior to the power failure.
SiUS121736EA Control Specification 4. Control Specification 4.1 Thermistor Functions Expansion valve (3) Outdoor Temperature Thermistor (5) Liquid Pipe Thermistor EVA EVB EVC EVD D (2) Outdoor Heat Exchanger Thermistor C B A Four way valve (1) Discharge Pipe Thermistor Compressor (7) Room Temperature Thermistor (4) Gas Pipe Thermistor (6) Indoor Heat Exchanger Thermistor (R23838) The illustration is for the 4-room models as representative and have 4 lines of indoor unit system (A – D).
Control Specification (5) Liquid Pipe Thermistor SiUS121736EA Liquid pipe thermistor is used to protect the compressor against liquid attack during cooling operation. In case of low outdoor temperature operation, the system compares the indoor heat exchanger temperature with the liquid pipe temperature to detect disturbances in the refrigerant flow. If any, the system adjusts the opening of the electronic expansion valve to control the refrigerant flow.
SiUS121736EA 4.2 Control Specification Mode Hierarchy Outline Air conditioner control has normal operation mode, forced operation mode, and power transistor test mode for installation and servicing.
Control Specification 4.3 Outline SiUS121736EA Frequency Control Frequency that corresponds to each room’s capacity is determined according to the difference between the target temperature and the temperature of each room. When the shift of the frequency is less than zero (∆F<0) by PI control, the target frequency is used as the command frequency. Dropping function Input current control, etc.
SiUS121736EA Parameters Control Specification Q value Indoor unit output determined from indoor unit volume, airflow rate and other factors. S value: Indoor Unit Capacity An S value is the capacity of the indoor unit, and is used for frequency command.
Control Specification 4.4 SiUS121736EA Controls at Mode Changing/Start-up 4.4.1 Preheating Control Outline The inverter operation in open phase starts with the conditions of the outdoor temperature and the preheating command from the indoor unit. Details ON Condition When the outdoor temperature is below 20°C (68°F), the inverter operation in open phase starts. OFF Condition When the outdoor temperature is higher than 22°C (71.6°F), the inverter operation in open phase stops. 4.4.
SiUS121736EA Control Specification 4.4.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. (The function is not used when defrosting.) (Hz) Frequency C B A D E (sec.) Time F (R13528) 4.
Control Specification 4.6 Outline SiUS121736EA Input Current Control The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit based on the input current. In case of heat pump models, this control is the upper limit control of frequency and takes priority over the lower limit control of four way valve operation compensation.
SiUS121736EA 4.7 Control Specification Freeze-up Protection Control 4.7.1 Freeze-up Protection Control (Except FDMQ Series) Applicable Models CTXG09/12/18QVJUW(S) FTXR09/12/18TVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU CDXS07/15/18/24LVJU FDXS09/12LVJU FVXS09/12/15/18NVJU FFQ09/12/15/18Q2VJU Outline During cooling operation, the signals sent from the indoor units control the operating frequency limitation and prevent freezing of the indoor heat exchanger.
Control Specification SiUS121736EA 4.7.2 Freeze-up Protection Control for FDMQ Series Outline During cooling operation, the signal sent from the indoor unit determines the frequency upper limit and prevents the indoor heat exchanger from freezing. Details When the freeze-up protection control starts, the compressor stops, the airflow rate is fixed to L tap, and the drain pump turns ON. Conditions for starting and ending are as below.
SiUS121736EA 4.8 Control Specification Heating Peak-cut Control Outline During heating operation, the indoor heat exchanger temperature determines the frequency upper limit to prevent abnormal high pressure. Details The operating frequency is judged with the indoor heat exchanger temperature 2 minutes after the operation starts and F seconds after the number of operation room is changed. The maximum value of the indoor heat exchanger temperature controls the following (excluding stopped rooms).
Control Specification 4.9 SiUS121736EA Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF control during defrosting The outdoor fan is turned OFF while defrosting. 3. Fan OFF delay when stopped The outdoor fan is turned OFF 60 seconds after the compressor stops. 4.
SiUS121736EA Control Specification 4.11 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish defrosting. Details Conditions for Starting Defrost The starting conditions are determined with the outdoor temperature and the outdoor heat exchanger temperature. The system is in heating operation. The compressor operates for 6 minutes.
Control Specification SiUS121736EA 18 class 24/36 class 33 4 ~ 12 26 4 ~ 12 39.2 ~ 53.6 58 39.2 ~ 53.6 58 E (Hz) F (seconds) 74 60 42 90 G (seconds) H (seconds) 120 650 60 590 J (seconds) K (pulse) 80 320 40 400 L (pulse) 300 250 M (pulse) N (pulse) 300 320 300 400 P (pulse) Q (pulse) 160 160 50 0 A (minutes) B (°C) C (°F) D (Hz) 4.
SiUS121736EA Control Specification 4.13 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Room Distribution Control 1. Gas pipe isothermal control 2. SC (subcooling) control 3. Liquid pipe temperature control (with all ports connected and all rooms being air-conditioned) 4.
Control Specification Details SiUS121736EA Gas pipe isothermal control SC (subcooling) control Control when the frequency changes Control for abnormally high discharge pipe temperature Oil recovery control Indoor freeze-up protection control Liquid pipe temperature control Liquid pipe temperature control for non-operating units Dew prevention control for indoor rotor The following are the examples of electronic expansion valve control which function in each operation mode.
SiUS121736EA Control Specification 4.13.1 Initialization as Power Supply On The electronic expansion valve is initialized (fully closed) when the power is turned on. Then, the valve opening is set and the pressure is equalized. 4.13.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalizing control is activated. The electronic expansion valve opens, and develops the pressure equalization. 4.13.
Control Specification SiUS121736EA 4.13.8 Discharge Pipe Thermistor Disconnection Control Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensing temperature. If the discharge pipe thermistor is disconnected, the electronic expansion valve opens according to the outdoor temperature and the operation frequency, operates for a specified time, and then stops.
SiUS121736EA Control Specification 4.13.10 SC (Subcooling) Control Outline The liquid pipe temperature and the heat exchanger temperature are detected and the electronic expansion valve opening is compensated so that the SC of each room becomes the target SC. When the actual SC is > target SC, open the electronic expansion valve of the room. When the actual SC is < target SC, close the electronic expansion valve of the room.
Control Specification SiUS121736EA 4.14 Malfunctions 4.14.1 Sensor Malfunction Detection Sensor malfunction may occur either in the thermistor or current transformer (CT) system. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Radiation fin thermistor 4. Gas pipe thermistor 5. Outdoor temperature thermistor 6. Liquid pipe thermistor Relating to CT Malfunction Refer to CT or related abnormality on page 201 for details. 4.14.
SiUS121736EA Part 5 Remote Controller 1. 2. 3. 4. 5. 6. 7. 8. 9. Remote Controller Applicable Remote Controller ................................................................. 111 ARC466A36 ............................................................................................ 112 ARC452A21 ............................................................................................ 114 ARC452A23 ............................................................................................
Applicable Remote Controller SiUS121736EA 1.
SiUS121736EA ARC466A36 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.
ARC466A36 SiUS121736EA 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.
SiUS121736EA ARC452A21 3. ARC452A21 Signal transmitter Receiver Display (LCD) • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate. • Do not drop the remote controller. Do not get it wet.
ARC452A21 SiUS121736EA Open the Front Cover MODE button • Selects the operation mode. AUTO DRY COOL HEAT FAN ECONO4 button • Starts ECONO operation. QUIET button SWING5 buttons • Starts OUTDOOR UNIT QUIET operation. • Adjusts the airflow direction. • When you press SWING button, the flap moves up and down, or (and) the louver moves right and left. The flap (louver) stops when you press SWING button again. • OUTDOOR UNIT QUIET operation is not available in FAN and DRY operation.
SiUS121736EA ARC452A23 4. ARC452A23 Signal transmitter Display (LCD) Receiver • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate. • Do not drop the remote controller. Do not get it wet.
ARC452A23 SiUS121736EA Open the Front Cover MODE button • Selects the operation mode. AUTO DRY COOL HEAT FAN ECONO2 button • Starts ECONO operation. QUIET button • Starts OUTDOOR UNIT QUIET operation. SELECT button • OUTDOOR UNIT QUIET operation is not available in FAN and DRY operation. • OUTDOOR UNIT QUIET operation and POWERFUL operation cannot be used at the same time. Priority is given to the function you pressed last. • Changes the ON/OFF TIMER settings.
SiUS121736EA ARC466A21 5. ARC466A21 Signal transmitter Display (LCD) • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) Receiver Temperature 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).
ARC466A21 SiUS121736EA Open the Front Cover Mode button • Selects the operation mode. AUTO DRY COOL HEAT FAN Econo2 button • Starts ECONO operation. Quiet button Swing3 button • Starts OUTDOOR UNIT QUIET operation. • OUTDOOR UNIT QUIET operation is not available in FAN and DRY operation. • OUTDOOR UNIT QUIET operation and POWERFUL operation cannot be used at the same time. Priority is given to the function you pressed last. • Adjusts the airflow direction.
SiUS121736EA Wired Remote Controller (BRC944B2) 6.
Wired Remote Controller (BRC1E73) SiUS121736EA 7. Wired Remote Controller (BRC1E73) 1. Operation mode selector button 11. LCD (with backlight) 4. Up button 5. Down button 6. Right button 7. Left button 9. Operation lamp 8. On/Off button 3. Menu/OK button 10. Cancel button 2.
SiUS121736EA Wired Remote Controller (BRC1E73) 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.
Wired Remote Controller (BRC1E73) SiUS121736EA Liquid Crystal Display • Three types of display mode (Standard, Detailed and Simple) are available. • Standard display is set by default. • Detailed and Simple displays can be selected in the main menu. Standard display 10.Changeover controlled 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.
SiUS121736EA Wired Remote Controller (BRC1E73) Simple display 1.Operation mode 14.Selectable Display Item 3.Setpoint 11.Setback 2.Fan speed 4.Stand by for Defrost/ Hot start Note for all display modes • Depending on the field settings, while the indoor unit is stopped, OFF may be displayed instead of the operation mode and/or the setpoint may not be displayed.
Wired Remote Controller (BRC1E73) SiUS121736EA “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.
SiUS121736EA Wired Remote Controller (BRC1E73) 11. Setback “ ” • The setback icon flashes when the unit is turned on by the setback control. 12. Airflow Direction “ ” • Displayed when the airflow direction and swing are set. • If the connected indoor unit model does not include oscillating louvers this item will not be displayed. 13. Current Day/Time (12/24 hour time display) • Displayed if the clock is set. • If the clock is not set, “ -- : -- ” will be displayed.
Wireless Remote Controller (BRC082A43) SiUS121736EA 8. Wireless Remote Controller (BRC082A43) 1 ON OFF 3 ON OFF 7 TEMP H M L DOWN 9 H M F L TIME UP UP 5 10 F FAN DOWN FAN 4 8 hr. 2 12 RESERVE CANCEL hr. hr. TIMER 11 MODE 13 hr.
SiUS121736EA 1 2 Wireless Remote Controller (BRC082A43) DISPLAY “ ” “ I ” (SIGNAL TRANSMISSION) This lights up when a signal is being transmitted. 11 DISPLAY “ ”“ ”“ (OPERATION MODE) 12 ”“ ”“ ” This display shows the current OPERATION MODE. 3 DISPLAY “ H M L ” (SET TEMPERATURE) F This display shows the set temperature. DISPLAY “ hr. hr. This display shows PROGRAMMED TIME of the system start or stop.
Wireless Remote Controller (BRC082A41W, BRC082A42W(S)) SiUS121736EA 9.
SiUS121736EA 1 2 Wireless Remote Controller (BRC082A41W, BRC082A42W(S)) DISPLAY (SIGNAL TRANSMISSION) This lights up when a signal is being transmitted. DISPLAY , , (OPERATION MODE) , , 11 12 13 14 This display shows the current OPERATION MODE. 3 DISPLAY DISPLAY This display shows PROGRAMMED TIME of the system start or stop. 5 DISPLAY 6 7 (FAN SPEED) DISPLAY /TEST (INSPECTION/TEST OPERATION) When the INSPECTION/TEST OPERATION button is pressed, the display shows the system mode is in.
SiUS121736EA Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items .......................................133 2. Troubleshooting with LED .......................................................................134 2.1 Indoor Unit................................................................................................ 134 2.2 Outdoor Unit ............................................................................................. 136 3. Service Diagnosis ..............................
SiUS121736EA 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 Outdoor Unit PCB Abnormality................................................................. 187 OL Activation (Compressor Overload) ..................................................... 188 Compressor Lock ..................................................................................... 190 DC Fan Lock ............................................................................................
General Problem Symptoms and Check Items SiUS121736EA 1. General Problem Symptoms and Check Items Problem Symptom Check Item None of the units operates. Check the power supply. Check the types of the indoor units. Check the outdoor temperature. Diagnose with remote controller indication For RA Indoor Unit: Check the wireless remote controller addresses. For SA Indoor Unit: Check the wireless remote controller addresses. Reference Page — Details Check if the rated voltage is supplied.
SiUS121736EA Troubleshooting with LED 2. Troubleshooting with LED 2.1 Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. A protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions. 2. A signal transmission error occurs between the indoor and outdoor units. In either case, conduct the diagnostic procedure described in the following pages.
Troubleshooting with LED SiUS121736EA FDMQ, FFQ series with wired remote controller (BRC1E73) + Operation lamp (green) +The error or warning message also blinks on the basic screen. (R23942) FDMQ series with wireless remote controller (BRC082A43) In case of wireless remote controller, a receiver is installed. When the error occurs, the operation lamp on the receiver blinks.
SiUS121736EA Caution: Troubleshooting with LED When operation stops suddenly and the operation lamp blinks, it could be operation mode conflict. For FFQ models, even if the operation mode conflict occurs, the operation lamp does not blink. 1) Check if the operation modes are all the same for the indoor units connected to multi system outdoor unit? 2) If not, set all the indoor units to the same operation mode and confirm that the operation lamp is not blinking.
Service Diagnosis SiUS121736EA 3. Service Diagnosis 3.1 RA Indoor Unit 3.1.1 ARC452 Series Remote Controller 1. When TIMER CANCEL button is held down for 5 seconds, 00 is displayed on the temperature 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. ARC452A21, A23 Notes: 137 No. 1 Code 00 No. 13 Code C7 No.
SiUS121736EA 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 beeps or the long beep. button and change the number until you hear the two consecutive (R14551) 3. 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.
Service Diagnosis SiUS121736EA 5. Press TEMP or TEMP button and change the number until you hear the long beep. (R14547) 6. Diagnose by the sound. beep : The left-side number does not correspond with the error code. two consecutive beeps : The left-side number corresponds with the error code but the right-side number does not. long beep : Both the left-side and right-side number corresponds with the error code. 7. Determine the error code.
SiUS121736EA Service Diagnosis 3.1.2 ARC466 Series Remote Controller 1. When Timer Cancel button is held down for 5 seconds, 00 is displayed on the temperature 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: Service Diagnosis No. 1 Code 00 No. 14 Code U0 No.
Service Diagnosis SiUS121736EA Method 2 1. Press the center of Temp button and Mode button at the same time. (R24046) 5C is displayed on the LCD. (R11821) 2. Select 5C (service check) with Temp or Temp button. 3. Press Mode button to enter the service check mode. (R24047) The left-side number blinks. (R11670) 4. Press Temp or Temp beeps or the long beep.
SiUS121736EA Service Diagnosis 5. Diagnose by the sound. beep: The left-side number does not correspond with the error code. two consecutive beeps: The left-side number corresponds with the error code but the 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 149, 150. 6. Press Mode button. (R24047) The right-side number blinks. (R11673) 7.
Service Diagnosis 3.2 SiUS121736EA SA Indoor Unit 3.2.1 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.
SiUS121736EA 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 F Error : Push Menu button Error: Push Menu button * The Operation lamp will flash.
Service Diagnosis SiUS121736EA 3.2.2 Wireless Remote Controller (BRC082A43, 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.
SiUS121736EA 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 SiUS121736EA 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.
SiUS121736EA Service Diagnosis Step 6 Action Press UP or DOWN button and change the error code lower digit until the indoor unit generates long beep. DOWN F E J C H A 9 8 7 6 5 4 3 2 1 0 UP button DOWN button UP (R15413) 7 If you hear... Then... 2 short beeps 1 long beep No digits match. Both upper and lower digits match. Press OPERATION MODE SELECTOR button to return to the normal mode. If you do not press any button for 1 minute, the remote controller automatically returns to the normal mode.
Code Indication on Remote Controller SiUS121736EA 4. Code Indication on Remote Controller 4.1 RA Indoor Unit Error Codes 4.
SiUS121736EA 4.
Troubleshooting for RA Indoor Unit SiUS121736EA 5. Troubleshooting for RA Indoor Unit 5.1 Indoor Unit PCB Abnormality Error Code A1 Method of Error Detection The system checks if the circuit works properly within the microcomputer of the indoor unit. Error Decision Conditions The system cannot set the internal settings.
SiUS121736EA Troubleshooting for RA Indoor Unit Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Combination of the indoor and outdoor unit matched? NO Match the compatible models. YES Check the connection of connectors. (Refer to Note) OK? ∗ To secure the connection, disconnect the connectors once and then reconnect. YES Check the power supply voltage. NO Voltage as rated? NO Correct the power supply.
Troubleshooting for RA Indoor Unit 5.2 SiUS121736EA Freeze-up Protection Control, Heating Peak-cut Control Error Code A5 Method of Error Detection Freeze-up protection control During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor.
SiUS121736EA 5.3 Troubleshooting for RA Indoor Unit Indoor Fan Motor or Related Abnormality 5.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable Models CTXG09/12/18QVJUW(S) FTXR09/12/18TVJUW(S) CTXS07LVJU FTXS09/12/15/18/24LVJU FVXS09/12/15/18NVJU Error Code A6 Method of Error Detection The rotation speed detected by the Hall IC during indoor fan motor operation determines abnormal fan motor operation.
Troubleshooting for RA Indoor Unit SiUS121736EA Troubleshooting Caution Check No.02 Refer to P.210 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Turn off the power and rotate the fan by hand. Does the fan rotate smoothly? NO Replace the indoor fan motor. YES Turn on the power and start operation.
SiUS121736EA Troubleshooting for RA Indoor Unit 5.3.2 Indoor Fan Motor (AC Motor) or Related Abnormality Applicable Models CDXS07/15/18/24LVJU FDXS09/12LVJU 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 RA Indoor Unit SiUS121736EA Troubleshooting Caution Check No.04 Refer to P.211 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.
SiUS121736EA 5.4 Troubleshooting for RA Indoor Unit Thermistor or Related Abnormality C4, C9 Error Code Method of Error Detection The temperatures detected by the thermistors determine thermistor errors. Error Decision Conditions The voltage between the both ends of the thermistor is either 4.96 V or more, or 0.04 V or less with the power on. Supposed Causes Disconnection of connector Thermistor corresponding to the error code is defective.
Troubleshooting for RA Indoor Unit 5.5 SiUS121736EA Front Panel Open/Close Fault Applicable Models CTXG09/12/18QVJUW(S) FTXR09/12/18TVJUW(S) Error Code C7 Error Decision Conditions If the error repeats, the system is shut down. Supposed Causes Defective reduction motor Malfunction or deterioration of the front panel mechanism Defective limit switch Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
SiUS121736EA 5.6 Troubleshooting for RA Indoor Unit Signal Transmission Error (Between Indoor Unit and Outdoor Unit) Error Code U4 Method of Error Detection The signal transmission data from the outdoor unit is checked whether it is normal. Error Decision Conditions The data sent from the outdoor unit cannot be received normally, or the content of the data is abnormal.
Troubleshooting for RA Indoor Unit Troubleshooting Caution Check No.11 Refer to P.211 SiUS121736EA Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Check the connection wires between the indoor unit and the outdoor unit.
SiUS121736EA 5.7 Troubleshooting for RA Indoor Unit Mismatching of Indoor Unit and Outdoor Unit Error Code UA Method of Error Detection The supply power is detected for its requirements (pair type is different from multi type) by the indoor/outdoor transmission signal. Error Decision Conditions The pair type and multi type are interconnected.
Troubleshooting for SA Indoor Unit SiUS121736EA 6. Troubleshooting for SA Indoor Unit 6.1 Indoor Unit PCB Abnormality Error Code A1 Method of Error Detection The system checks the data from EEPROM. Error Decision Conditions 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.
SiUS121736EA 6.2 Troubleshooting for SA Indoor Unit 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.
Troubleshooting for SA Indoor Unit 6.3 SiUS121736EA Indoor Fan Motor or Related Abnormality 6.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable Models FDMQ09/12/15/18/24RVJU Error Code A6 Method of Error Detection Detection from the current flow on the fan PCB Detection from the rotation speed of the fan motor in operation Error Decision Conditions The rotation speed is less than a certain level for 6 seconds.
SiUS121736EA Troubleshooting for SA Indoor Unit A The HAP lamp on the indoor unit control PCB is blinking while the HAP lamp on the fan PCB is not blinking. YES NO Turn OFF the power supply and wait for 10 minutes. Turn OFF the power supply and wait for 10 minutes. Check No.02 Check the fan motor connectors. Each resistance between the pins is equal to or lower than 1 Ω. YES Replace the fan motor. Replace the fan PCB (A2P). NO Replace the fan PCB (A2P).
Troubleshooting for SA Indoor Unit SiUS121736EA 6.3.2 Indoor Fan Motor (DC Motor) or Related Abnormality Applicable Models FFQ09/12/15/18Q2VJU Error Code A6 Method of Error Detection The rotation speed detected by the Hall IC during indoor fan motor operation determines abnormal fan motor operation. Error Decision Conditions The fan motor is not revved up.
SiUS121736EA Troubleshooting for SA Indoor Unit Troubleshooting Caution Check No.02 Refer to P.210 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Turn off the power supply. (Unplug the power cable or turn the breaker off.) Check the connector for connection. OK? NO Correct the connection.
Troubleshooting for SA Indoor Unit 6.4 SiUS121736EA Indoor Fan PCB Abnormality Applicable Models Error Code FDMQ09/12/15/18/24RVJU A8 Method of Error Detection Microcomputer checks the voltage state of the fan PCB. Error Decision Conditions Overvoltage or voltage drop is detected on the fan PCB. Supposed Causes Defective fan PCB External factor such as noise Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
SiUS121736EA 6.5 Troubleshooting for SA Indoor Unit 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 SA Indoor Unit 6.6 SiUS121736EA Thermistor or Related Abnormality C4, C5, C9 Error Code Method of Error Detection The temperatures detected by the thermistors determine thermistor errors. Error Decision Conditions The thermistor is disconnected or shorted while the unit is running. Supposed Causes Troubleshooting If the cause of the problem is related to the thermistors, the thermistors should be checked prior to changing the indoor unit PCB. Check No.01 Refer to P.
SiUS121736EA 6.7 Troubleshooting for SA Indoor Unit Presence Sensor or Floor Sensor Abnormality Applicable Models FFQ09/12/15/18Q2VJU CE Error Code Method of Error Detection The system detects abnormality by the output signal from the sensor(s). Error Decision Conditions The sensor is disconnected or shorted while the unit is running.
Troubleshooting for SA Indoor Unit 6.8 SiUS121736EA Remote Controller Thermistor Abnormality CJ Error Code Method of Error Detection Even if remote controller thermistor is faulty, system is possible to operate by system thermistor. Malfunction detection is carried out by the temperature detected by the remote controller thermistor. Error Decision Conditions The remote controller thermistor is disconnected or shorted while the unit is running.
SiUS121736EA 6.9 Troubleshooting for SA Indoor Unit Signal Transmission Error (Between Indoor Unit and Outdoor Unit) Error Code U4 Method of Error Detection The signal transmission data from the outdoor unit is checked whether it is normal. Error Decision Conditions The data sent from the outdoor unit cannot be received normally, or the content of the data is abnormal.
Troubleshooting for SA Indoor Unit Troubleshooting Caution Check No.11 Refer to P.211 SiUS121736EA Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Check the connection wires between the indoor unit and the outdoor unit.
SiUS121736EA Troubleshooting for SA Indoor Unit 6.10 Signal Transmission Error (Between Indoor Unit and Remote Controller) Error Code U5 Method of Error Detection In case of controlling 1 indoor unit with 2 remote controllers, check the system using microcomputer if signal transmission between indoor unit and remote controller (main and sub) is normal. Error Decision Conditions Normal transmission does not continue for specified period.
Troubleshooting for SA Indoor Unit SiUS121736EA 6.11 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.
SiUS121736EA Troubleshooting for SA Indoor Unit 6.
Troubleshooting for Outdoor Unit SiUS121736EA 7. Troubleshooting for Outdoor Unit 7.1 Refrigerant Shortage Error Code U0 Outdoor Unit LED Display Aj 1h 2h 3i 4i 5h Method of Error Detection Refrigerant shortage is detected by checking the input current value and the compressor running frequency. If there is insufficient refrigerant, the input current tends to be lower than the normal value. Error Decision Conditions The following conditions continue for 7 minutes.
SiUS121736EA Troubleshooting for Outdoor Unit Troubleshooting Caution Check No.01 Refer to P.209 Check No.12 Refer to P.212 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Any thermistor disconnected? NO Stop valve closed? YES ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗ Room temperature thermistor ∗ Outdoor temperature thermistor YES Reconnect the thermistor(s). Open the stop valve.
Troubleshooting for Outdoor Unit 7.2 SiUS121736EA Low-voltage Detection or Over-voltage Detection Error Code Outdoor Unit LED Display U2 Aj 1i 2h 3h 4i 5h Method of Error Detection Indoor Unit The zero-cross detection of the power supply is evaluated by the indoor unit PCB. Outdoor Unit Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit. Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit.
SiUS121736EA Troubleshooting for Outdoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Check the connection of the compressor harness. Loose or disconnected? YES Reconnect the harness.
Troubleshooting for Outdoor Unit 7.3 SiUS121736EA Wiring Error Check Unexecuted U3 Error Code Outdoor Unit LED Display Aj 1h 2i 3h 4h 5h Method of Error Detection The system checks if wiring error check is executed after clearing the memory. Error Decision Conditions An error is determined when the unit is operated by the remote controller without executing wiring error check after the memory was cleared.
SiUS121736EA 7.4 Troubleshooting for Outdoor Unit Unspecified Voltage (Between Indoor Unit and Outdoor Unit), Anti-Icing Control in Other Rooms UA, UH Error Code Outdoor Unit LED Display Aj 1h 2h 3h 4h 5h Method of Error Detection A wrong connection is detected by checking the combination of indoor and outdoor units on the microcomputer.
Troubleshooting for Outdoor Unit 7.5 SiUS121736EA Anti-Icing Control for Indoor Unit Error Code A5 Outdoor Unit LED Display Aj 1i 2h 3i 4i 5h Method of Error Detection During cooling operation, indoor unit icing is detected by checking the temperatures sensed by the indoor heat exchanger thermistor and room temperature thermistor that are located in a shut-down room. Error Decision Conditions In cooling operation, the both conditions (A) and (B) are met for 5 minutes.
SiUS121736EA Troubleshooting for Outdoor Unit Troubleshooting Caution Check No.01 Refer to P.209 Check No.12 Refer to P.212 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the wiring and piping. Wrong wiring or piping? YES Activate the wiring error check function. NO Check No. 12 Check the electronic expansion valve. Functioning? NO Replace the electronic expansion valve or coil. YES Check No.
Troubleshooting for Outdoor Unit 7.6 SiUS121736EA Outdoor Unit PCB Abnormality Error Code E1 Outdoor Unit LED Display Aj 1i 2i 3i 4h 5h Method of Error Detection Detect within the program of the microcomputer. Error Decision Conditions The program of the microcomputer is in abnormal running order.
SiUS121736EA 7.7 Troubleshooting for Outdoor Unit OL Activation (Compressor Overload) Error Code E5 Outdoor Unit LED Display Aj 1i 2h 3i 4h 5h Method of Error Detection A compressor overload is detected through compressor OL. Error Decision Conditions If the error repeats, the system is shut down.
Troubleshooting for Outdoor Unit SiUS121736EA Troubleshooting Caution Check No.01 Refer to P.209 Check No.12 Refer to P.212 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Discharge pipe thermistor disconnected? NG Replace the discharge pipe thermistor. OK Is the connector S40 properly connected? Check No.14 Refer to P.213 Insert the thermistor in position. NO Check No. 01 Check the discharge pipe thermistor. Check No.13 Refer to P.
SiUS121736EA 7.8 Troubleshooting for Outdoor Unit Compressor Lock Error Code E6 Outdoor Unit LED Display Aj 1h 2i 3i 4h 5h Method of Error Detection A compressor lock is detected by checking the compressor running condition through the position detection circuit. Error Decision Conditions Judging from the current waveform generated when high-frequency voltage is applied to the compressor. If the error repeats, the system is shut down.
Troubleshooting for Outdoor Unit 7.9 SiUS121736EA DC Fan Lock Error Code E7 Outdoor Unit LED Display Aj 1i 2i 3i 4i 5h Method of Error Detection An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Error Decision Conditions The fan does not start in 30 seconds even when the fan motor is running. If the error repeats, the system is shut down.
SiUS121736EA Troubleshooting for Outdoor Unit 7.10 Input Overcurrent Detection Error Code E8 Outdoor Unit LED Display Aj 1h 2i 3h 4i 5h Method of Error Detection Detected by checking the input current value Error Decision Conditions The input current is at a certain value (depending on the condition) for 2.5 seconds. The compressor halts if the error occurs, and restarts automatically after 3-minute standby. Supposed Causes Outdoor temperature is out of operation range.
Troubleshooting for Outdoor Unit SiUS121736EA 7.11 Four Way Valve Abnormality Error Code EA Outdoor Unit LED Display Aj 1i 2h 3h 4h 5h Method of Error Detection The liquid pipe thermistor and the outdoor heat exchanger thermistor are checked to see if they function within their normal ranges in the operating mode. Error Decision Conditions The following condition continues for A seconds after the compressor has started.
SiUS121736EA Troubleshooting for Outdoor Unit Troubleshooting Caution Check No.01 Refer to P.209 Check No.13 Refer to P.213 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Four way valve coil disconnected (loose)? Correct the four way valve coil. NO Harness disconnected? Check No.14 Refer to P.213 YES YES Reconnect the harness. NO Check the continuity of the four way valve coil and harness. Disconnect the harness from the connector.
Troubleshooting for Outdoor Unit SiUS121736EA 7.12 Discharge Pipe Temperature Control Error Code F3 Outdoor Unit LED Display Aj 1i 2h 3i 4h 5h Method of Error Detection An error is determined with the temperature detected by the discharge pipe thermistor. Error Decision Conditions If the temperature detected by the discharge pipe thermistor rises above A, the compressor stops. The error is cleared when the discharge pipe temperature is dropped below B.
SiUS121736EA Troubleshooting for Outdoor Unit 7.13 High Pressure Control in Cooling Error Code F6 Outdoor Unit LED Display Aj 1i 2h 3i 4i 5h Method of Error Detection High pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Error Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rises above about 65°C (149°F).
Troubleshooting for Outdoor Unit SiUS121736EA 7.14 Compressor Sensor System Abnormality Error Code H0 Outdoor Unit LED Display Aj 1i 2i 3h 4h 5h Method of Error Detection The system checks the power supply voltage and the DC voltage before the compressor starts. The system checks the DC current of the compressor right after the compressor starts.
SiUS121736EA Troubleshooting for Outdoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn off the power. Check the connection of the reactor. Connection OK? NO Connect the reactor properly. YES Check the connection of the compressor. Connection OK? NO Connect the compressor properly. YES Check the reactor.
Troubleshooting for Outdoor Unit SiUS121736EA 7.15 Position Sensor Abnormality Error Code H6 Outdoor Unit LED Display Aj 1i 2i 3h 4h 5h Method of Error Detection A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit. Error Decision Conditions If the error repeats, the system is shut down.
SiUS121736EA Troubleshooting for Outdoor Unit Troubleshooting Caution Check No.15 Refer to P.214 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn off the power. Check the power supply voltage. Check No.18 Refer to P.216 Check No.20 Refer to P.217 Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Check No. 18 Check the discharge pressure. OK? NO Replace the stop valve. YES Check No.
Troubleshooting for Outdoor Unit SiUS121736EA 7.16 CT or Related Abnormality Error Code H8 Outdoor Unit LED Display Aj 1i 2i 3h 4h 5h Method of Error Detection A CT or related error is detected by checking the compressor running frequency and CT-detected input current. Error Decision Conditions The compressor running frequency is more than A Hz and input current is less than B A. 18/24 class 36 class A (Hz) 32 B (A) 0.5 55 0.5 If the error repeats, the system is shut down.
SiUS121736EA Troubleshooting for Outdoor Unit Troubleshooting Caution Check No.15 Refer to P.214 Check No.21 Refer to P.218 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn off the power. Then, turn on the power to restart the system. Start operation. ∗ Running current as shown at right with relay cable 1 or 2? YES Current (guideline) Replace the outdoor unit PCB (main PCB).
Troubleshooting for Outdoor Unit SiUS121736EA 7.17 Thermistor or Related Abnormality (Outdoor Unit) Error Code H9, J3, J6, J8, J9, P4 Outdoor Unit LED Display Aj 1i 2i 3h 4h 5h Method of Error Detection This fault is identified based on the thermistor input voltage to the microcomputer. A thermistor fault is identified based on the temperature sensed by each thermistor. Error Decision Conditions The voltage between both ends of the thermistor is above 4.96 V or below 0.04 V with the power on.
SiUS121736EA Troubleshooting Check No.01 Refer to P.209 Troubleshooting for Outdoor Unit In case of H9, J3, J6, J8, J9 Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn on the power again. Error displayed again on remote controller? NO Reconnect the connectors or thermistors. YES Check No. 01 Check the thermistor resistance value. Normal? J3 error: The discharge pipe temperature is lower than the heat exchanger temperature.
Troubleshooting for Outdoor Unit SiUS121736EA 7.18 Electrical Box Temperature Rise Error Code L3 Outdoor Unit LED Display Aj 1i 2i 3h 4i 5h Method of Error Detection An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off. Error Decision Conditions With the compressor off, the radiation fin temperature is above A. The error is cleared when the temperature drops below B.
SiUS121736EA Troubleshooting for Outdoor Unit 7.19 Radiation Fin Temperature Rise L4 Error Code Outdoor Unit LED Display Aj 1h 2h 3h 4i 5h Method of Error Detection A radiation fin temperature rise is detected by checking the radiation fin temperature with the compressor on. Error Decision Conditions The radiation fin temperature with the compressor on is above A. The error is cleared when the temperature drops below B.
Troubleshooting for Outdoor Unit SiUS121736EA 7.20 Output Overcurrent Detection Error Code L5 Outdoor Unit LED Display Aj 1h 2h 3i 4h 5h Method of Error Detection An output overcurrent is detected by checking the current that flows in the inverter DC section. Error Decision Conditions A position signal error occurs while the compressor is running. A rotation speed error occurs while the compressor is running.
SiUS121736EA Troubleshooting for Outdoor Unit Troubleshooting Caution Check No.15 Refer to P.214 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. ∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again. Check No. 17 Check the installation condition. Check No.17 Refer to P.
Check SiUS121736EA 8. Check 8.1 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 °F –20 –4 197.8 –15 5 148.2 –10 14 112.1 –5 23 85.60 0 32 65.93 5 41 51.14 10 50 39.99 15 59 31.52 20 68 25.02 25 77 20.00 30 86 16.10 35 95 13.04 40 104 10.62 45 113 8.707 50 122 7.
SiUS121736EA 8.2 Check Indoor Fan Motor Connector Check Check No.02 CTXG, FTXR, CTXS, FTXS, FVXS Series Check the connection of connector. Check motor power supply voltage output (pins 4 - 7). Check motor control voltage (pins 4 - 3). Check rotation command voltage output (pins 4 - 2). Check rotation pulse input (pins 4 - 1). 1. 2. 3. 4. 5.
Check 8.3 SiUS121736EA Hall IC Check Check No.04 CDXS, FDXS Series 1. Check the connector connection. 2. With the power on, operation off, and the connector connected, check the following. (1) Output voltage of about 5 V between pins 1 and 3. (2) Generation of 3 pulses between pins 2 and 3 when the indoor fan motor is operating. If NG in step (1) Æ Defective PCB Æ Replace the PCB (control PCB). If NG in step (2) Æ Defective Hall IC Æ Replace the indoor fan motor.
SiUS121736EA 8.5 Check Electronic Expansion Valve Check Check No.12 Conduct the following to check the electronic expansion valve (EV). 1. Check if the EV connector is correctly inserted in the PCB. Match the EV unit number and the connector number. 2. Turn the power off and on again, and check if all the EVs generate a latching sound. 3. If any of the EVs does not generate a latching sound in the above step 2, disconnect that connector and check the continuity using a multimeter.
Check 8.6 SiUS121736EA Four Way Valve Performance Check Check No.13 Turn off the power. Then, turn on the power to restart the system. Start heating operation. S80 voltage at 208 - 230 VAC with compressor on? (Fig. 1) ∗ Four way valve coil Cooling/Dry/Defrost: Not energized Heating: energized NO Replace the outdoor unit PCB (main PCB). YES Disconnect the four way valve coil from the connector and check the continuity.
SiUS121736EA 8.8 Check Inverter Analyzer Check Check No.15 Characteristics Inverter analyzer: RSUK0917C If an abnormal stop occurs due to compressor startup failure or overcurrent output when using an inverter unit, it is difficult to judge whether the stop is caused by the compressor failure or some other failure (main PCB, power module, etc.). The inverter analyzer makes it possible to judge the cause of trouble easily and securely.
Check SiUS121736EA Diagnose method (Diagnose according to 6 LEDs lighting status.) (1) If all the LEDs are lit uniformly, the compressor is defective. → Replace the compressor. (2) If the LEDs are not lit uniformly, check the power module. → Refer to Check No.22. (3) If NG in Check No.22, replace the power module. (Replace the main PCB. The power module (IPM1) is united with the main PCB.) If OK in Check No.22, check if there is any solder cracking on the PCB.
SiUS121736EA Check 8.10 Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air suction and discharge area. NG Change the installation location or direction. OK Is the discharged air short-circuited? YES Change the installation location or direction. NO Is the outdoor heat exchanger very dirty? YES Clean the outdoor heat exchanger.
Check SiUS121736EA 8.12 Outdoor Fan System Check Check No.19 DC motor Check the outdoor fan system. Is the outdoor fan running? NO Fan motor lead wire connector disconnected? YES NO Go to Check No. 16. YES Outdoor fan system is functioning. Reconnect the connector. (R21195) 8.13 Main Circuit Short Check Check No.
SiUS121736EA Check 8.14 Capacitor Voltage Check Check No.21 Before this check, be sure to check the main circuit for short circuit. With the circuit breaker still on, measure the voltage according to the drawing of the model in question. Be careful never to touch any live parts. Multimeter (DC. voltage range) (R21938) To prevent an electrical shock, use a multimeter to check that the voltage between FU2 and DC– is 50 V or less. The surface of the test points (DC–) may be covered with the coating.
Check SiUS121736EA 8.15 Power Module Check Check No.22 Check to make sure that the voltage between (+) and (–) of the power module is about 0 V before checking. Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector. Follow the procedure below to measure resistance between the (+) or (–) terminal of the power module and the U, V or W terminal of the compressor with a multimeter.
SiUS121736EA Part 7 Trial Operation and Field Settings 1. 2. 3. 4. Pump Down Operation............................................................................221 Forced Cooling Operation .......................................................................222 Wiring Error Check Function ...................................................................223 Trial Operation ........................................................................................ 225 4.1 RA Indoor Unit..................
Pump Down Operation SiUS121736EA 1. Pump Down Operation Pump Down Operation In order to protect the environment, be sure to pump down when relocating or disposing the unit. 1. 2. 3. 4. 5. Remove the valve cap from liquid stop valve and gas stop valve. Carry out forced cooling operation. After 5 to 10 minutes, close the liquid stop valve with a hexagonal wrench. After 2 to 3 minutes, close the gas stop valve and stop the forced cooling operation. Attach the valve cap once procedures are complete.
SiUS121736EA Forced Cooling Operation 2. Forced Cooling Operation Outline The forced cooling operation is allowed when both the following conditions are met. 1. The outdoor unit is not abnormal and not in the 3-minute standby mode. 2. The outdoor unit is not operating. Protection functions have priority over all other functions during forced cooling operation. Procedure 1. 2. 3. 4. 5. 6. 7. 8. Turn off the power. Remove the service lid (2 screws). Remove the service monitor PCB switch cover (1 screw).
Wiring Error Check Function SiUS121736EA 3. Wiring Error Check Function Outline Wiring error check function is designed for the microcomputer to correct wiring errors itself. If local wiring is unclear in the case of buried piping, for example, just press the wiring error check switch on the outdoor unit. Even if the connections for Room A and Room B are confused, the system may run without a hassle. Note that this check function does not work in the following cases.
SiUS121736EA Wiring Error Check Function Refrigerant flows from Port A and on. The indoor heat exchanger temperatures are detected one by one to check up the matching between the piping and wiring. With this function on, freezing (crackling) noise may be heard from the indoor unit. This is not a problem. (This is because the indoor heat exchanger temperature is made to drop below 0°C (32°F) in order to increase the detection accuracy.) The indoor fan turns on or off during wiring checking.
Trial Operation SiUS121736EA 4. Trial Operation 4.1 RA Indoor Unit Outline Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts, such as flap movement, are working properly. Trial operation should be carried out in either cooling or heating operation. Procedure 1. Measure the power supply voltage and make sure that it falls within the specified range. 2.
SiUS121736EA Trial Operation ARC466 Series (1) Press On/Off button to turn on the system. (2) Press the center of Temp button and Mode button at the same time. (3) Select T (trial operation) with Temp or Temp button. (4) Press Mode button to start the trial operation. (5) Press Mode button and select operation mode. (6) Trial operation terminates in about 30 minutes and switches into normal mode. To quit trial operation, press On/Off button.
Trial Operation 4.2 SiUS121736EA SA Indoor Unit Make sure to install the decoration panel before carrying out trial operation if the wireless remote controller is used (FFQ series only). Trial operation should be carried out in either cooling or heating operation. Outline 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.
SiUS121736EA Trial Operation With Wired Remote Controller (BRC1E73) 1. Set to COOL or HEAT operation using the remote controller. Basic screen 1. 2. 2. Press and hold Cancel button for 4 seconds or longer. Service settings menu is displayed. Cool Set to 68 F 3. In the case of a model having airflow direction function, select Test Operation 3. in the service settings menu, and press Menu/OK button. Basic screen returns and “Test Operation” is displayed at the bottom.
Trial Operation SiUS121736EA With Wireless Remote Controller (BRC082A43, BRC082A41W, BRC082A42W(S)) 1. Press button and select the COOL or HEAT operation. 2. Press button twice. “TEST” is displayed. 3. Press button within 10 seconds, and the test operation starts. Monitor the operation of the indoor unit for a minimum of 10 minutes. During test operation, the indoor unit will continue to cool/heat regardless of the temperature setpoint and room temperature.
SiUS121736EA Field Settings 5. Field Settings 5.1 Outdoor Unit 5.1.1 Priority Room Setting Outline 1. Operation mode The operation mode of the prioritized room takes precedence. For example, when the prioritized indoor unit starts cooling operation, the other indoor units which have been in heating operation enter the standby mode. Heating operation will resume if the prioritized indoor unit stops cooling operation. 2.
Field Settings SiUS121736EA 5.1.2 COOL/HEAT Mode Lock Use the S15 connector to set the unit to cooling only or heating only. Setting to heating only (H): short-circuit the pins 1 and 3 of the connector S15. Setting to cooling only (C): short-circuit the pins 3 and 5 of the connector S15. The following specifications apply to the connector housing and pins. JST products: Housing: VHR-5N Pin: SVH-21T-1, 1 Note that forced operation is also possible in cooling/heating mode.
SiUS121736EA 5.2 Field Settings RA Indoor Unit 5.2.1 Model Type Setting ARC452A21, ARC452A23 The remote controller is common to the heat pump model and cooling only model. Make sure the DIP switch is set to the left side. The heating operation will not be available when the DIP switch is set to the right side. Heat pump model Cooling only model DIP switch DIP switch (R18201) ARC466A21, ARC466A36 The remote controller is common to the heat pump model and cooling only model.
Field Settings SiUS121736EA 5.2.2 Temperature Display Switch You can select Fahrenheit or Celsius for temperature display. ARC452A21, ARC452A23 Press TEMP and TEMP temperature display. buttons at the same time for 5 seconds to change the unit of (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.
SiUS121736EA Field Settings 5.2.3 When 2 Units are Installed in 1 Room Outline When 2 indoor units are installed in 1 room, 1 of the 2 indoor units and the corresponding wireless remote controller can be set for different address. Both the indoor unit PCB and the wireless remote controller need alteration. The method of address setting varies depending on the type of indoor unit and the series of wired remote controller.
Field Settings FVXS Series SiUS121736EA (1) Remove the front grille. (2) Lift the sensor PCB fixing plate and remove the front shield plate. (3) Disconnect the connectors S1, S41, S42. (4) Remove the electric box (1 screw). (5) Pull out the indoor heat exchanger thermistor. (6) Remove the shield plate (8 tabs). (7) Cut the address setting jumper JA on the indoor unit PCB. (5) Indoor heat exchanger thermistor Connector S42 Connector S41 (3) Connector S1 (4) Remove the screw.
SiUS121736EA 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 (R12065) ADDRESS EXIST 1 CUT 2 ∗ Do not cut the left jumper. (R18416) Replace the remote controller if you cut a jumper unintentionally. Jumpers are necessary for electronic circuit. Improper operation may occur if you cut a wrong jumper. 5.2.
Field Settings 5.3 SiUS121736EA SA Indoor Unit 5.3.1 How to Change the Field Settings Outline If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed. Refer to the instruction manual for each optional accessory. Note: When using 2 remote controllers for 1 indoor unit, change the field settings from MAIN remote controller. Note that the field settings can not be set from SUB remote controller.
SiUS121736EA Field Settings 3. Highlight the mode, and select desired “Mode No.” by using (Up/Down) button. 4. In the case of setting per indoor unit during group control (When Mode No. such as 20 , 22 , 23 , 25 are selected), highlight the unit No.and select “Indoor unit No.” to be set by using (Up/Down) button. (In the case of group setting, this operation is not needed.) In the case of individual setting per indoor unit, current settings are displayed. And, SECOND CODE NO. “ - ” means no function. 5.
Field Settings SiUS121736EA Wireless Remote Controller (BRC082A43, 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.
SiUS121736EA Field Settings 5.3.2 Overview of the Field Settings for FFQ Series 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 SiUS121736EA 5.3.3 Overview of the Field Settings for FDMQ Series 3 Filter cleaning Longlife sign interval (used to change filter filter cleaning display interval Standard according to filter filter contamination) Filter cleaning sign (used to set filter cleaning display ON/ OFF) 11 (21) 7 Air volume adjustment 13 (23) 6 External static pressure 01 02 03 04 05 06 Approx. 1,250 hrs. — — — — Approx. 100 hrs.
SiUS121736EA Field Settings 5.3.4 MAIN/SUB Setting when Using 2 Wired Remote Controllers Outline The MAIN/SUB setting is necessary when 1 indoor unit is controlled by 2 remote controllers. When you use 2 remote controllers, set one to MAIN and the other to SUB. Details 1. The following message is displayed after power-on. Checking the connection. Please stand by. When the above message is displayed, the backlight will not be ON.
Field Settings SiUS121736EA 5.3.5 MAIN/SUB and Address Setting for Wireless Remote Controller for FDMQ Series Outline If setting multiple wireless remote controllers to operate in one room, perform address setting for the receiver and the wireless remote controller. If using both a wired remote controller and a wireless remote controller with 1 indoor unit, change the MAIN/SUB switch of the signal receiver PCB.
SiUS121736EA Wireless Remote Controller Address Field Settings Factory set is 1. Change the wireless remote controller address setting by the following steps, if necessary. 1. Hold down button and /TEST button at the same time for at least 4 seconds to enter the field setting mode. (SETTING is indicated on the display). 2. Press FAN button and select display setting ( or ). Each time the button is pressed, the display switches between and . 3. Press button and button to set the address.
Field Settings SiUS121736EA After Setting Stick the Unit No. label on the receiver and the back of the wireless remote controller. Wireless remote controller (2) Unit No. label (5) 1 (R25081) Note: 245 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.
SiUS121736EA Field Settings 5.3.6 MAIN/SUB and Address Setting for Wireless Remote Controller for FFQ Series Outline If setting multiple wireless remote controllers to operate in one room, perform address setting for the receiver and the wireless remote controller. If using both a wired remote controller and a wireless remote controller with 1 indoor unit, change the MAIN/SUB switch of the transmitter board.
Field Settings Wireless Remote Controller Address SiUS121736EA 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.
SiUS121736EA 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.
Silicone Grease on Power Transistor/Diode Bridge SiUS121736EA 6. Silicone Grease on Power Transistor/Diode Bridge Outline Apply the specified silicone grease to the heat radiation part of a power transistor/diode bridge when you replace an outdoor unit PCB. The silicone grease encourages the heat radiation of a power transistor/diode bridge. Details 1. 2. 3. 4. Wipe off the old silicone grease completely. Apply the silicone grease evenly. See the illustrations below for examples of application.
SiUS121736EA Part 8 Appendix 1. Piping Diagrams......................................................................................251 1.1 Indoor Unit................................................................................................ 251 1.2 Outdoor Unit ............................................................................................. 254 2. Wiring Diagrams......................................................................................256 2.1 Indoor Unit...................
Piping Diagrams SiUS121736EA 1. Piping Diagrams 1.
SiUS121736EA Piping Diagrams FTXS24LVJU CDXS07LVJU, FDXS09/12LVJU INDOOR UNIT INDOOR UNIT 5/16 CuT (1/4CuT) DISTRIBUTOR HEAT EXCHANGER THERMISTOR ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING 1/4 CuT HEAT EXCHANGER THERMISTOR ON HEAT EXCH.
Piping Diagrams SiUS121736EA FVXS09/12NVJU FVXS15/18NVJU INDOOR UNIT INDOOR UNIT MUFFLER ASSY 9/32 CuT 1/4 CuT 1/4 CuT THERMISTOR ON HEAT EXCH. TURBO FAN FAN MOTOR FIELD PIPING (3/8 CuT) HEAT EXCHANGER 1/4 CuT 1/4 CuT 1/4 CuT 1/4 CuT M FIELD PIPING (1/4 CuT) MUFFLER ASSY 9/32 CuT HEAT EXCHANGER 1/4 CuT 1/4 CuT THERMISTOR ON HEAT EXCH.
SiUS121736EA 1.
Piping Diagrams SiUS121736EA 4MXS36RMVJU, 4MXS36RMVJUA OUTDOOR UNIT HEAT EXCHANGER 5/16 CuT OUTDOOR AIR THERMISTOR HEADER ELECTRONIC EXPANSION VALVE LIQUID PIPE THERMISTOR EVA 5/16 CuT 1/4 CuT FILTER 5/16 CuT 5/16 CuT HEAT EXCHANGER (CONDENSER) THERMISTOR 5/16 CuT 1/2 CuT 5/16 CuT 5/16 CuT MUFFLER WITH FILTER 3/8 CuT 3/8 CuT DISTRIBUTOR CAPILLARY TUBE DC FAN MOTOR M PROPELLER FAN 1/2 CuT FOUR WAY VALVE 1/2 CuT ROOM C (1/4 CuT) 1/4 CuT GAS PIPE THERMISTOR MUFFLER GAS PIPE THERMISTOR MUFF
SiUS121736EA Wiring Diagrams 2. Wiring Diagrams 2.
Wiring Diagrams SiUS121736EA 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.
SiUS121736EA Wiring Diagrams FTXS15/18/24LVJU WIRING DIAGRAM 1 PCB3 S49 1 LED1 H1P LED2 H2P LED3 H3P 9 PCB1 S46 1 BLK BLK BLK BLK BLK BLK BLK BLK BLK FU1 F1U H1 3.15A ~ C102 V1 - MR10 H2 H3 TRANSMISSION CIRCUIT FU2 F2U HA RTH1 R1T 7 S1 3.15A 4 S25 1 BLK PCB2 WIRELESS REMOTE CONTROLLER 1 S48 1 3 S32 S41 2 16 8 10 12 14 2 5 3 4 6 15 13 11 9 7 1 BLK INTELLIGENT EYE SENSOR S47 1 3 3 OUTDOOR FIELD WIRING.
Wiring Diagrams SiUS121736EA CDXS07/15/18/24LVJU, FDXS09/12LVJU 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 t° 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.
SiUS121736EA Wiring Diagrams FVXS09/12/15/18NVJU PCB3 PCB2 S27 S2W (4) S26 ~ V1 F1U ~ RECTIFIER + H1 3.15A H2 S4W GRN GRN/YLW MR10 WIRELESS REMOTE CONTROLLER SA1 LED1 H1P S1W S47 S46 F2U LED2 3.15A 7 E1 4 H2P 1 M1S M2S INDOOR M RED ORG YLW PNK BLU M RED ORG YLW PNK BLU S42 1 S21 CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
Wiring Diagrams SiUS121736EA FDMQ09/12/15/18/24RVJU 3D112629A Note: 261 A1P: Control PCB A2P: Indoor fan PCB Refer to Part 3 for Printed Circuit Board Connector Wiring Diagram.
SiUS121736EA Wiring Diagrams FFQ09/12/15/18Q2VJU WIRING DIAGRAM WIRELESS REMOTE CONTROLLER (RECEIVER/DISPLAY UNIT) (OPTIONAL ACCESSORY) GRN OUTDOOR BLK WHT RED PNK WHT YLW ORG BLU BLK INDOOR UNIT PRINTED CIRCUIT BOARD CAPACITOR (M1F) DIP SWITCH ON PCB FUSE (F, 5A, 250V) FLASHING LAMP (SERVICE MONITOR GREEN) CENTRAL REMOTE K2R MAGNETIC RELAY CONTROLLER M1F FAN MOTOR (NOTE 2) M1P DRAIN PUMP MOTOR WIRED REMOTE CONTROLLER (OPTIONAL ACCESSORY) (NOTE 3) GRN/YLW NORM. EMG.
Wiring Diagrams 2.2 SiUS121736EA Outdoor Unit 2MXS18NMVJU SW4 M1C SW6 SW5 S2 X3M 1 2 3 1 FU3 HL1 30A V2 3 S80 MRM20 MRM10 FU1 3.
SiUS121736EA Wiring Diagrams 2MXS18NMVJUA WIRING DIAGRAM 1 ZF MRM10 FU1 3.15A 1 V401 FU2 3.
Wiring Diagrams SiUS121736EA 3MXS24RMVJU, 3MXS24RMVJUA WIRING DIAGRAM BRN BLU GRN 1 FU3 HL1 30A V2 MRM10 ZF 1 V401 FU2 3.
SiUS121736EA Wiring Diagrams 4MXS36RMVJU, 4MXS36RMVJUA YLW V401 BLU YLW RED ~ BLU YLW RED BLU BRN ORG WHT Z3C N=3 4321 W V U S70 WVU + C110 ~- : CAPACITOR : DIODE BRIDGE : FUSE : INTELLIGENT POWER MODULE : LIVE : PILOT LAMP : COMPRESSOR MOTOR : FAN MOTOR MRM10, MRM20 MR4 PCB1, 2 PS Q1L R1T~R7T, R9T~R12T SA1 SHEET METAL : MAGNETIC RELAY : MAGNETIC RELAY : PRINTED CIRCUIT BOARD : SWITCHING POWER SUPPLY : OVERLOAD PROTECTOR : THERMISTOR : SURGE ARRESTER : TERMINAL STRIP FIXED PLATE
Operation Limit SiUS121736EA 3. Operation Limit 2MXS18NMVJU, 3MXS24RMVJU, 4MXS36RMVJU 2MXS18NMVJUA, 3MXS24RMVJUA, 4MXS36RMVJUA Heating Cooling 68 122 114.8 59.9 59 104 50 Continuous operation 50 Outdoor temp. (˚FWB) 68 Pull-down period Continuous operation Outdoor temp. (˚FDB) 86 41 32 23 32 14 14 5 (5˚FDB) 50 57.2 68 73.4 Indoor temp. (˚FWB) 267 82.4 86 Notes: The graphs are based on the following conditions.
Revision History Month / Year Version 01 / 2018 SiUS121736E 06 / 2020 SiUS121736EA Revised contents First edition Model Addition: FTXR09/12/18TVJUW(S), 2MXS18NMVJUA, 3MXS24RMVJUA, 4MXS36RMVJUA
Warning 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.
