Daikin 4MXL-T Series Service Manual Download Page 152

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Troubleshooting with LED

SiUS121827E

146

Part 6 Service Diagnosis

2. Troubleshooting with LED

2.1 Indoor Unit

Operation Lamp

The operation lamp blinks when any of the following errors is detected.



A protection device of the indoor or outdoor unit is activated, or when the thermistor
malfunctions.



A signal transmission error occurs between the indoor and outdoor units.

In either case, conduct the diagnostic procedure described in the following pages.

FTXR/CTXG Series

CTXS/FTXS Series

FDXS/CDXS Series

Operation lamp
(multi-monitor lamp)

(R24043)

(R23939)

Operation lamp
(green)

(R23940)

Operation lamp
(green)

Summary of Contents for 4MXL-T Series

Page 1: ... Applied Models Inverter Pair Heat Pump Multi Split Type Air Conditioners 5MXS T 4MXL T Series Service Manual SiUS121827E ...

Page 2: ...art 3 Printed Circuit Board Connector Wiring Diagram 36 1 Indoor Unit 37 1 1 FTXR09 12 18TVJUW S CTXG09 12 18QVJUW S 37 1 2 CTXS07LVJU FTXS09 12LVJU 39 1 3 FTXS15 18 24LVJU 41 1 4 FDXS09 12LVJU CDXS15 18 24LVJU 43 1 5 FVXS09 12 15 18NVJU 45 1 6 FDMQ09 12 15 18 24RVJU 47 1 7 FFQ09 12 15 18Q2VJU 49 2 Sensor Kit for FFQ Series 50 2 1 BRYQ60A2W S 50 3 Wired Remote Controller 51 3 1 BRC1E73 51 4 Wirele...

Page 3: ...Clock and Calendar Setting With Wired Remote Controller BRC1E73 87 3 5 Schedule TIMER Operation With Wired Remote Controller BRC1E73 89 3 6 Setback Function With Wired Remote Controller BRC1E73 93 3 7 Drain Pump Control 94 3 8 Hot Start Control In Heating Operation Only 96 3 9 Presence and Floor Sensors Option 97 3 10 Other Functions 100 4 Control Specification 102 4 1 Thermistor Functions 102 4 2...

Page 4: ...Unit 162 4 2 SA Indoor Unit 162 4 3 Outdoor Unit 163 5 Troubleshooting for RA Indoor Unit 164 5 1 Indoor Unit PCB Abnormality 164 5 2 Freeze up Protection Control Heating Peak cut Control 166 5 3 Indoor Fan Motor or Related Abnormality 167 5 4 Thermistor or Related Abnormality 172 5 5 Front Panel Open Close Fault 173 5 6 Signal Transmission Error Between Indoor Unit and Outdoor Unit 174 5 7 Mismat...

Page 5: ...y 219 7 15 Position Sensor Abnormality 221 7 16 Thermistor or Related Abnormality Outdoor Unit 224 7 17 Electrical Box Temperature Rise 226 7 18 Radiation Fin Temperature Rise 227 7 19 Output Overcurrent Detection 229 8 Check 232 8 1 Thermistor Resistance Check 232 8 2 Indoor Fan Motor Connector Check 233 8 3 Hall IC Check 234 8 4 Power Supply Waveform Check 235 8 5 Electronic Expansion Valve Chec...

Page 6: ...it 256 5 2 SA Indoor Unit 262 5 3 Outdoor Unit 274 6 Silicone Grease on Power Transistor Diode Bridge 277 Part 8 Appendix 278 1 Piping Diagrams 279 1 1 Indoor Unit 279 1 2 Outdoor Unit 282 2 Wiring Diagrams 283 2 1 Indoor Unit 283 3 Outdoor Unit 290 4 Operation Limit 292 ...

Page 7: ...US121827E Introduction 1 1 Safety Cautions 2 1 1 Warnings and Cautions Regarding Safety of Workers 2 1 2 Warnings and Cautions Regarding Safety of Users 4 2 Icons Used 7 3 Revision History 8 Introduction ...

Page 8: ...truction is shown in the illustration or near the symbol 1 1 Warnings and Cautions Regarding Safety of Workers This manual is for the person in charge of maintenance and inspection Warning Do not store equipment in a room with fire sources e g naked flames gas appliances electric heaters Be sure to disconnect the power cable from the socket before disassembling equipment for repair Working on equi...

Page 9: ...ant The use of materials for R 22 refrigerant models may cause a serious accident such as a damage of refrigerant cycle or equipment failure Do not mix air or gas other than the specified refrigerant R 32 R 410A R 22 in the refrigerant system If air enters the refrigerant system an excessively high pressure results causing equipment damage and injury Caution Do not repair electrical components wit...

Page 10: ...the same power outlet with other electrical appliances since it may cause an electrical shock excessive heat generation or fire Be sure to use an exclusive power circuit for the equipment and follow the local technical standards related to the electrical equipment the internal wiring regulations and the instruction manual for installation when conducting electrical work Insufficient power circuit ...

Page 11: ...k to make sure that the power cable plug is not dirty or loose then insert the plug into a power outlet securely If the plug is dusty or has a loose connection it may cause an electrical shock or fire When replacing the coin battery in the remote controller be sure to dispose of the old battery to prevent children from swallowing it If a child swallows the coin battery see a doctor immediately Cau...

Page 12: ...ance is 1 MΩ or higher Faulty insulation may cause an electrical shock Be sure to check the drainage of the indoor unit after the repair Faulty drainage may cause water to enter the room and wet the furniture and floor Do not tilt the unit when removing it The water inside the unit may spill and wet the furniture and floor Caution ...

Page 13: ...ution 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 Note Note Note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Reference Reference Reference guides the reader to other places in this binder or in this ...

Page 14: ...Revision History SiUS121827E 8 Introduction 3 Revision History Month Year Version Revised contents 12 2018 SiUS121827E First edition ...

Page 15: ...SiUS121827E Part 1 General Information 9 1 Applicable Models 10 1 1 Heat Pump 10 2 Functions 11 2 1 RA Indoor Unit 11 2 2 SA Indoor Unit 17 2 3 Outdoor Unit 21 Part 1 General Information ...

Page 16: ...TVJUW FTXR18TVJUS CTXG09QVJUW CTXG09QVJUS CTXG12QVJUW CTXG12QVJUS CTXG18QVJUW CTXG18QVJUS CTXS07LVJU FTXS09LVJU FTXS12LVJU FTXS15LVJU FTXS18LVJU FTXS24LVJU FDXS09LVJU FDXS12LVJU CDXS15LVJU CDXS18LVJU CDXS24LVJU FVXS09NVJU FVXS12NVJU FVXS15NVJU FVXS18NVJU FDMQ09RVJU FDMQ12RVJU FDMQ15RVJU FDMQ18RVJU FDMQ24RVJU FFQ09Q2VJU FFQ12Q2VJU FFQ15Q2VJU FFQ18Q2VJU 5MXS48TVJU 4MXL36TVJU ...

Page 17: ...atic cooling heating changeover Program dry operation Fan only Lifestyle Convenience POWERFUL operation inverter HOME LEAVE operation ECONO operation Indoor unit ON OFF switch Signal receiving sign R C with back light Temperature display Health and Cleanliness Air purifying filer Titanium apatite deodorizing filter Option Option Longlife filter Air filter prefilter Wipe clean flat panel Washable g...

Page 18: ... Option Remote control adaptor normal open contact Option Option Option Option DIII NET compatible adaptor Option Option Option Option Wireless LAN connection Option Option Option Option Remote Controller Wireless Wired Option Option Option Option Available Not available Category Functions Wall Mounted Non Duct Type FTXR CTXG CTXS FTXS ...

Page 19: ...tart function Operation Automatic cooling heating changeover Program dry operation Fan only Lifestyle Convenience POWERFUL operation inverter HOME LEAVE operation ECONO operation Indoor unit ON OFF switch Signal receiving sign R C with back light Temperature display Health and Cleanliness Air purifying filer Titanium apatite deodorizing filter Longlife filter Air filter prefilter Wipe clean flat p...

Page 20: ...ion Option Option Option Remote control adaptor normal open contact Option Option Option Option DIII NET compatible adaptor Option Option Option Option Wireless LAN connection Available Not available Category Functions L S P Duct Connected Type FDXS CDXS With wired R C With wireless R C With wired R C With wireless R C ...

Page 21: ... changeover Program dry operation Fan only Lifestyle Convenience POWERFUL operation inverter HOME LEAVE operation ECONO operation Indoor unit ON OFF switch Signal receiving sign R C with back light Temperature display Health and Cleanliness Air purifying filer Titanium apatite deodorizing filter Longlife filter Air filter prefilter Wipe clean flat panel Washable grille Filter cleaning indicator Go...

Page 22: ...mote control adaptor normal open pulse contact Option Remote control adaptor normal open contact Option DIII NET compatible adaptor Option Wireless LAN connection Option Remote Controller Wireless Wired Available Not available Category Functions Floor Standing Type FVXS ...

Page 23: ...ENT EYE operation 2 area INTELLIGENT EYE operation Hot start function Operation Automatic cooling heating changeover Program dry operation Fan only Lifestyle Convenience POWERFUL operation inverter HOME LEAVE operation ECONO operation Emergency operation switch Signal receiving sign R C with back light Temperature display Health and Cleanliness Air purifying filer Titanium apatite deodorizing filt...

Page 24: ...ht or left Drain pump Power selection F C changeover R C temperature display factory setting F Remote Control Remote control adaptor normal open pulse contact Remote control adaptor normal open contact DIII NET compatible adaptor Option Option Wireless LAN connection Available Not available Receiving sound only Category Functions M S P Duct Connected Type FDMQ With wired R C With wireless R C ...

Page 25: ... Draft prevention with sensor Operation Automatic cooling heating changeover Program dry operation Fan only Setback function Lifestyle Convenience POWERFUL operation inverter HOME LEAVE operation ECONO operation Emergency operation switch Signal receiving sign R C with back light Health and Cleanliness Air purifying filer Titanium apatite deodorizing filter Longlife filter Option Option Option Opt...

Page 26: ... DIII NET compatible adaptor Option Option Option Option Remote Controller Wireless Option Option Option Option Wired Option Option Option Option Available Not available Receiving sound only Category Functions Ceiling Mounted Type FFQ Decoration Panel BYFQ60B3W1 Decoration panel BYFQ60C2W1W S With wired R C With wireless R C With wired R C With wireless R C ...

Page 27: ...ce DC motor NIGHT QUIET mode OUTDOOR UNIT QUIET operation Quick warming function Automatic defrosting Defrost learning control Priority room setting COOL HEAT mode lock Auto restart after power failure Self diagnosis R C LED Wiring error check function Anti corrosion treatment of outdoor heat exchanger Drain pan heater control by microcomputer Flexible power supply correspondence Chargeless 131 6 ...

Page 28: ...SiUS121827E 22 Part 2 Specifications 1 Specifications 23 1 1 RA Indoor Unit 23 1 2 SA Indoor Unit 31 1 3 Outdoor Unit 34 Part 2 Specifications ...

Page 29: ...Notes 1 SL The quiet fan level of the airflow rate setting 1 SL The quiet fan level of the airflow rate setting Model FTXR12TVJUW FTXR12TVJUS Cooling Heating Cooling Heating Power Supply Phase 1 φ 1 φ Hz V 60 Hz 208 230 V 60 Hz 208 230 V Rated Capacity 12 kBtu h Class 12 kBtu h Class Front Panel Color White Silver Airflow Rates H cfm m3 min 335 9 5 395 11 2 335 9 5 395 11 2 M 219 6 2 290 8 2 219 6...

Page 30: ...e quiet fan level of the airflow rate setting 1 SL The quiet fan level of the airflow rate setting Model CTXG09QVJUW CTXG09QVJUS Cooling Heating Cooling Heating Power Supply Phase 1 φ 1 φ Hz V 60 Hz 208 230 V 60 Hz 208 230 V Rated Capacity 9 kBtu h Class 9 kBtu h Class Front Panel Color White Silver Airflow Rates H cfm m3 min 279 7 9 367 10 4 279 7 9 367 10 4 M 212 6 0 265 7 5 212 6 0 265 7 5 L 16...

Page 31: ...quiet fan level of the airflow rate setting 1 SL The quiet fan level of the airflow rate setting Model CTXG18QVJUW CTXG18QVJUS Cooling Heating Cooling Heating Power Supply Phase 1 φ 1 φ Hz V 60 Hz 208 230 V 60 Hz 208 230 V Rated Capacity 18 kBtu h Class 18 kBtu h Class Front Panel Color White Silver Airflow Rates H cfm m3 min 364 10 3 438 12 4 364 10 3 438 12 4 M 286 8 1 350 9 9 286 8 1 350 9 9 L ...

Page 32: ...anel Color White White Airflow Rates H cfm m3 min 381 10 8 420 11 9 403 11 4 438 12 4 M 279 7 9 321 9 1 307 8 7 335 9 5 L 194 5 5 233 6 6 205 5 8 240 6 8 SL 145 4 1 219 6 2 155 4 4 212 6 0 Fan Type Cross Flow Fan Cross Flow Fan Motor Output W 23 23 Speed Steps 5 Steps Quiet Auto 5 Steps Quiet Auto Air Direction Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Remova...

Page 33: ...32 Sound Power Level dB 61 59 62 61 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid in mm φ 1 4 φ 6 4 φ 1 4 φ 6 4 Gas in mm φ 1 2 φ 12 7 φ 1 2 φ 12 7 Drain in mm φ 5 8 φ 16 φ 5 8 φ 16 Drawing No 3D075043A 3D075044A Notes 1 SL The quiet fan level of the airflow rate setting 1 SL The quiet fan level of the airflow rate setting Model FTXS24LVJU Cooling Hea...

Page 34: ... 424 12 0 424 12 0 424 12 0 M 388 11 0 388 11 0 388 11 0 388 11 0 L 353 10 0 353 10 0 353 10 0 353 10 0 SL 297 8 4 297 8 4 297 8 4 297 8 4 Fan Type Sirocco Fan Sirocco Fan Motor Output W 130 130 Speed Steps 5 Steps Quiet Auto 5 Steps Quiet Auto Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 79 0 79 0 79 0 79 Power Consumption Rated W 172 172 17...

Page 35: ...VJU FVXS12NVJU Cooling Heating Cooling Heating Power Supply Phase 1 φ 1 φ Hz V 60 Hz 208 230 V 60 Hz 208 230 V Rated Capacity 9 kBtu h Class 12 kBtu h Class Front Panel Color White White Airflow Rates H cfm m3 min 290 8 2 311 8 8 300 8 5 332 9 4 M 230 6 5 244 6 9 237 6 7 258 7 3 L 169 4 8 177 5 0 173 4 9 184 5 2 SL 145 4 1 155 4 4 159 4 5 166 4 7 Fan Type Turbo Fan Turbo Fan Motor Output W 12 3 13...

Page 36: ... 17 0 21 0 19 Power Consumption Rated W 27 27 34 34 Power Factor Rated 68 3 69 1 77 8 77 8 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D in mm 23 5 8 27 9 16 8 1 4 600 700 210 23 5 8 27 9 16 8 1 4 600 700 210 Packaged Dimensions H W D in mm 27 3 8 30 15 16 11 696 786 280 27 3 8 30 15 16 11 696 786 280 Weight Mass Lbs kg 31 14 31 14 Gross Weight Gross Mass Lbs kg ...

Page 37: ...the duct system of the suction side Select its dust collection efficiency gravity method 50 or more Model FDMQ15RVJU FDMQ18RVJU Cooling Heating Cooling Heating Power Supply Phase 1 φ 1 φ Hz V 60 Hz 208 230 V 60 Hz 208 230 V Rated Capacity 15 kBtu h Class 18 kBtu h Class Casing Color Dimensions H W D in mm 9 5 8 39 3 8 31 1 2 245 1 000 800 9 5 8 39 3 8 31 1 2 245 1 000 800 Coil Type Cross Fin Coil ...

Page 38: ...6 27 9 16 27 9 16 55 700 700 2 3 16 27 9 16 27 9 16 55 700 700 Weight Mass Lbs kg 6 2 7 6 2 7 Decoration Panel 2 Model BYFQ60C2W1W BYFQ60C2W1S BYFQ60C2W1W BYFQ60C2W1S Color White Silver White Silver Dimensions H W D in mm 1 13 16 24 7 16 24 7 16 46 620 620 1 13 16 24 7 16 24 7 16 46 620 620 Weight Mass Lbs kg 6 2 2 8 6 2 2 8 Airflow Rates H cfm m3 min 378 10 7 399 11 3 406 11 5 427 12 1 M 339 9 6 ...

Page 39: ... Speed Steps 3 Steps 3 Steps Air Direction Control Running Current Rated A 0 29 0 26 0 29 0 26 0 52 0 47 0 52 0 47 Power Consumption Rated W 28 28 51 51 51 51 Power Factor Rated 46 4 46 8 46 4 46 8 47 2 47 2 47 2 47 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D in mm 10 1 4 22 5 8 22 5 8 260 575 575 10 1 4 22 5 8 22 5 8 260 575 575 Packaged Dimensions H W D in ...

Page 40: ... M 102 5 L 34 9 Starting Current A 27 0 Dimensions H W D In mm 34 1 4 43 5 16 18 1 8 870 1 100 460 Packaged Dimensions H W D In mm 39 15 16 46 7 8 22 1 014 1 190 558 Weight Mass Lbs kg 216 98 Gross Weight Gross Mass Lbs kg 236 107 Sound Pressure Level dB A 53 55 Piping Connection Liquid in mm φ 1 4 5 φ 6 4 5 Gas in mm φ 3 8 1 φ 1 2 2 φ 5 8 2 φ 9 5 1 φ 12 7 2 φ 15 9 2 Drain in mm I D φ 1 φ 25 Heat ...

Page 41: ... L 34 9 Starting Current A 27 0 Dimensions H W D In mm 34 1 4 43 5 16 18 1 8 870 1 100 460 Packaged Dimensions H W D In mm 39 15 16 46 7 8 22 1 014 1 190 558 Weight Mass Lbs kg 214 97 Gross Weight Gross Mass Lbs kg 234 106 Sound Pressure Level dB A 53 55 Piping Connection Liquid in mm φ 1 4 4 φ 6 4 4 Gas in mm φ 3 8 1 φ 1 2 2 φ 5 8 1 φ 9 5 1 φ 12 7 2 φ 15 9 1 Drain in mm I D φ 1 φ 25 Heat Insulati...

Page 42: ...8 24LVJU 43 1 5 FVXS09 12 15 18NVJU 45 1 6 FDMQ09 12 15 18 24RVJU 47 1 7 FFQ09 12 15 18Q2VJU 49 2 Sensor Kit for FFQ Series 50 2 1 BRYQ60A2W S 50 3 Wired Remote Controller 51 3 1 BRC1E73 51 4 Wireless Remote Controller Receiver for FDMQ series 52 4 1 BRC082A43 52 5 Wireless Remote Controller Kit for FFQ Series 53 5 1 BRC082A41W BRC082A42W S 53 6 Outdoor Unit 54 Part 3 Printed Circuit Board Connect...

Page 43: ...r 4 S41 Connector for swing motors 5 S42 Connector for reduction motor front panel mechanism and limit switch 6 S46 Connector for display signal receiver PCB A2P 7 S200 Connector for DC fan motor 8 H1 H2 H3 Connector for terminal strip indoor outdoor transmission 9 FG Connector for terminal strip frame ground 10 JB Fan speed setting when compressor stops for thermostat OFF Refer to page 261 for de...

Page 44: ...it Improper operation may occur if you cut any of them INTELLIGENT EYE Sensor PCB A3P 1 S51 Connector for control PCB A1P 2 S52 Connector for room temperature thermistor 3 S1W Indoor unit ON OFF switch 4 H1P LED for operation multi color 5 H2P LED for INTELLIGENT EYE green 6 JA Address setting jumper Refer to page 258 for details S52 S51 S1W JA H2P H1P 3P357402 2 1 S36 Connector for control PCB A1...

Page 45: ...3 S25 Connector for INTELLIGENT EYE sensor PCB PCB4 4 S32 Indoor heat exchanger thermistor 5 S41 Connector for swing motors 6 S46 Connector for display PCB PCB3 7 S47 Connector for signal receiver PCB PCB2 8 H1 H2 H3 FG Connector for terminal strip 9 JA Address setting jumper Refer to page 258 for details 10 JB Fan speed setting when compressor stops for thermostat OFF Refer to page 261 for detail...

Page 46: ... names on the appropriate wiring diagram 1 S48 Connector for control PCB PCB1 3P210728 1 S48 1 S49 Connector for control PCB PCB1 2 SW1 Indoor unit ON OFF switch 3 LED1 H1P LED for operation green 4 LED2 H2P LED for timer yellow 5 LED3 H3P LED for INTELLIGENT EYE green 6 RTH1 R1T Room temperature thermistor 3P210728 1 RTH1 SW1 LED3 LED2 LED1 S49 1 S26 Connector for control PCB PCB1 3EB86013 1 S26 ...

Page 47: ...Connector for INTELLIGENT EYE sensor PCB PCB4 4 S32 Indoor heat exchanger thermistor 5 S41 Connector for swing motors 6 S46 Connector for display PCB PCB3 7 S47 Connector for signal receiver PCB PCB2 8 H1 H2 H3 FG Connector for terminal strip 9 JA Address setting jumper Refer to page 258 for details 10 JB Fan speed setting when compressor stops for thermostat OFF Refer to page 261 for details 11 J...

Page 48: ...ames on the appropriate wiring diagram 1 S48 Connector for control PCB PCB1 3P224121 1 S48 S48 1 S49 Connector for control PCB PCB1 2 SW1 Indoor unit ON OFF switch 3 LED1 H1P LED for operation green 4 LED2 H2P LED for timer yellow 5 LED3 H3P LED for INTELLIGENT EYE green 6 RTH1 R1T Room temperature thermistor 3P224121 1 RTH1 SW1 LED3 LED2 LED1 S49 1 S36 Connector for control PCB PCB1 S36 3P227885 ...

Page 49: ...fan motor Hall IC 3 S21 Connector for centralized control HA 4 S26 Connector for display signal receiver PCB A2P 5 S32 Connector for indoor heat exchanger thermistor 6 H1 H2 H3 Connector for terminal block 7 FG GND Connector for terminal block ground 8 JA Address setting jumper Refer to page 258 for details 9 JB Fan speed setting when compressor stops for thermostat OFF Refer to page 261 for detai...

Page 50: ...LED 1 does not function The symbols in the parenthesis are the names on the appropriate wiring diagram 1 S1 Connector for control PCB A1P 2 SW1 S1W Indoor unit ON OFF switch 3 LED2 H2P LED for timer yellow 4 LED3 H3P LED for operation green 5 RTH1 R1T Room temperature thermistor S1 LED3 LED2 SW1 2P084375 1 RTH1 LED1 1 ...

Page 51: ...3 4 S32 Indoor heat exchanger thermistor 5 S41 Connector for lower air outlet motor 6 S42 Connector for swing motor 7 S46 Connector for display signal receiver PCB PCB4 8 S48 Connector for sensor PCB PCB1 9 H1 H2 H3 Connector for terminal strip 10 E1 Terminal for ground wire 11 JA Address setting jumper Refer to page 258 for details 12 JB Fan speed setting when compressor stops for thermostat OFF ...

Page 52: ...PCB2 2 RTH2 R1T Room temperature thermistor S49 RTH2 3P191450 1 1 S27 Connector for control PCB PCB2 2 SW2 S2W 4 Switch for upward airflow limit setting Refer to page 261 for details Keep the other switches as factory setting 3 SW4 S4W Switch for airflow selection Refer to page 63 for details S27 SW4 SW2 4 3P191448 1 1 S47 Connector for control PCB PCB2 2 SW1 S1W Indoor unit ON OFF switch 3 LED1 H...

Page 53: ... X25A Connector for drain pump motor 5 X27A Connector for terminal block for power supply 6 X28A Connector for power supply wiring option 7 X30A Connector for terminal block for wired remote controller 8 X33A Connector for wiring option 9 X35A Connector for wiring adaptor option 10 X70A Connector for indoor fan PCB A2P 11 F1U Fuse 3 15 A 250 V 12 HAP LED for service monitor green 13 DS1 DIP switch...

Page 54: ...PCB A2P 1 X3A Connector for control PCB A1P 2 X6A Connector for reactor 3 X8A Connector for indoor fan motor 4 X10A Connector for terminal block for power supply 5 F2U Fuse 5 A 250 V 6 F4U Fuse 6 3 A 250 V 7 HAP LED for service monitor green 2P442228 16 2P442228 17 F2U X8A X3A X10A F4U X6A HAP ...

Page 55: ...X25A Connector for drain pump motor 7 X27A Connector for terminal block for inter unit wiring 8 X30A Connector for terminal block for wired remote controller 9 X33A Connector for adaptor for wiring option 10 X35A Connector for wiring adaptor for electrical appendices option 11 X36A Connector for swing motors on decoration panel option 12 X80A Connector for decoration panel BYFQ60B3W1 option 13 X81...

Page 56: ...rt 3 Printed Circuit Board Connector Wiring Diagram 2 Sensor Kit for FFQ Series 2 1 BRYQ60A2W S Outline Thermopile Sensor A4P Pyroelectric Sensor A5P Thermopile sensor A4P Pyroelectric sensor A5P R25074 Connector 3P262610 1 Connector 3P262611 1 ...

Page 57: ...te Controller Part 3 Printed Circuit Board Connector Wiring Diagram 51 3 Wired Remote Controller 3 1 BRC1E73 Wired Remote Controller PCB 1 P1 P2 Terminal for indoor unit 2 R4T Room temperature thermistor P2 R4T P1 2P298037 7 ...

Page 58: ...r Wiring Diagram 4 Wireless Remote Controller Receiver for FDMQ series 4 1 BRC082A43 Wired Remote Controller PCB 1 SS1 MAIN SUB setting switch Refer to page 268 for details 2 SS2 Address setting switch Refer to page 268 for details 3 P1 P2 Terminal for indoor unit control PCB A1P SS1 P2 P1 3P156152 1 SS2 ...

Page 59: ...e appropriate wiring diagram 1 X1A Connector for receiver A3P 2 X2A Connector for control PCB A1P 3 SS1 MAIN SUB setting switch Refer to page 271 for details 4 SS2 Address setting switch Refer to page 271 for details 3P156326 3 X2A SS2 SS1 X1A 1 X1A Connector for transmitter board A2P 2 BS1 Emergency operation switch 3 LED1 H1P LED for operation red 4 LED2 H2P LED for timer green 5 LED3 H3P LED fo...

Page 60: ...ctor for electronic expansion valve coil E port 5MXS T only 8 S25 red Connector for electronic expansion valve coil for bypass circuit 9 S40 Connector for overload protector 10 S70 Connector for DC fan motor 11 S80 Connector for four way valve coil 12 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 13 S92 Connector for gas pipe thermistor 14 S93 Connector fo...

Page 61: ...21827E Outdoor Unit Part 3 Printed Circuit Board Connector Wiring Diagram 55 S92 S201 S90 S93 S25 FU1 S202 V401 S 2P519836 1 S40 S20 S23 S22 S21 S15 S10 FU10 FU3 V4 V3 HN1 HL1 E1 U FU2 E3 V W S70 S80 E2 S24 ...

Page 62: ...D1 LED2 LED3 LED4 LED5 LED for service monitor red 4 SW1 Forced cooling operation ON OFF switch Refer to page 248 for details 5 SW2 Operation mode switch Refer to page 248 for details 6 SW3 Wiring error check switch Refer to page 249 for details 7 SW4 Priority room setting switch Refer to page 274 for details 8 SW6 1 NIGHT QUIET mode setting switch Refer to page 276 for details 3P346711 10 S502 SW...

Page 63: ...ctions 84 3 1 Airflow Direction Control 84 3 2 Fan Speed Control for Indoor Unit 85 3 3 Program Dry Operation 86 3 4 Clock and Calendar Setting With Wired Remote Controller BRC1E73 87 3 5 Schedule TIMER Operation With Wired Remote Controller BRC1E73 89 3 6 Setback Function With Wired Remote Controller BRC1E73 93 3 7 Drain Pump Control 94 3 8 Hot Start Control In Heating Operation Only 96 3 9 Prese...

Page 64: ...27E 58 Part 4 Functions and Control 4 10 Liquid Compression Protection Function 114 4 11 Defrost Control 114 4 12 Low Hz High Pressure Limit 116 4 13 Electronic Expansion Valve Control 116 4 14 Malfunctions 121 ...

Page 65: ...ature control is done by the target temperature appropriately adjusted for the indoor unit and the temperature detected by room temperature thermistor 1 2 Frequency Principle Control Parameters The frequency of the compressor is controlled by the following 2 parameters The load condition of the operating indoor unit The difference between the room thermistor temperature and the target temperature ...

Page 66: ...even when the outdoor temperature is 2 C 35 6 F Comfortable air conditioning A fine adjustment is integrated to keep the room temperature constant Energy saving heating and cooling Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following functions regulate the minimum and maximum frequency Low frequency Fou...

Page 67: ...om Heating During heating operation the large flap directs airflow downward to spread the warm air to the entire room Wide Angle Louvers The louvers made of elastic synthetic resin provide a wide range of airflow that guarantees comfortable air distribution Auto Swing The following tables explain the auto swing process for cooling dry heating and fan FTXR CTXG series CTXS FTXS series Flap up and d...

Page 68: ...s louvers move from the right to the left 2 The horizontal blades flaps move downward 3 The vertical blades louvers move from the left to the right 4 The horizontal blades flaps move upward COMFORT AIRFLOW Operation FTXR CTXG CTXS FTXS Series The flaps are controlled not to blow the air directly at the people in the room The airflow will be in the upward direction while in cooling operation and in...

Page 69: ...from the upper air outlet Use this switch when you do not want air coming out of the lower air outlet e g while sleeping Air is blown from the upper outlet only Front panel The blow pattern is automatically decided depending on mode and conditions Recommended and factory set R17866 Operating mode Situation Blowing pattern Cooling operation When the room has become fully cool or when 1 hour has pas...

Page 70: ...pper limit is at M tap in 30 minutes from the operation start Heating In heating operation the fan speed is regulated according to the indoor heat exchanger temperature and the difference between the room thermistor temperature and the target temperature The fan stops during defrost operation COMFORT AIRFLOW Operation FTXR CTXG CTXS FTXS Series The fan speed is controlled automatically within the ...

Page 71: ...en the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Thermostat turns on also when the room temperature is in the zone B for 10 minutes Room thermistor temperature at start up Target temperature X Thermostat OFF point Y Thermostat ON point Z 24 C or more 75 2 F or more Room thermistor temperature at start up X 2 5 C X 4 5 F X...

Page 72: ...C 5 4 F FTXR CTXG CTXS FTXS series Tr Tt 2 5 C 4 5 F FDXS CDXS FVXS series 2 Cooling Heating switching point Tr Tt 2 5 C 4 5 F FTXR CTXG series Tr Tt 3 0 C 5 4 F CTXS FTXS FDXS CDXS FVXS series 3 Thermostat ON OFF point is the same as the ON OFF point of cooling or heating operation 4 During initial operation Tr Ts Cooling operation Tr Ts Heating operation FTXR CTXG Series Ex When the target tempe...

Page 73: ...n the zone A The system resumes from defrost control in any zones except A The operation turns on in any zones except A The monitoring time has passed while the temperature difference is in the zone B Cooling 10 minutes Heating 10 seconds Cooling Heating FTXR CTXG Series Target temperature 2 5 C 4 5 F Heating Operation Target temperature 3 0 C 5 4 F Cooling Operation R22000 Target temperature 2 0 ...

Page 74: ...ase of heating This prevents excessive cooling in summer and excessive heating in winter to ensure comfortable sleeping conditions and also conserves electricity Cooling Heating Zone B Zone B Zone A Zone A OFF OFF ON ON Zone C Zone C 2 0 C 3 6 F 1 0 C 1 8 F 0 5 C 0 9 F 1 5 C 2 7 F 2 0 C 3 6 F Room thermistor temperature target temperature R24033 Room thermistor temperature target temperature R2403...

Page 75: ...CONO button on the wireless remote controller Details When this function is activated the maximum capacity also decreases The remote controller can send the ECONO command when the unit is in cooling heating dry or automatic operation This function can only be set when the unit is running Pressing ON OFF button on the remote controller cancels the function This function and POWERFUL operation canno...

Page 76: ...sampling every 20 msec If the motion sensor detects 10 times or more of the wave output in one second in total and the High signal continues for 3 sec the microcomputer judges humans are in the room as the human detection signal is ON 2 area INTELLIGENT EYE motion sensor divides the area into 2 and detects presence of humans in each area Image of 2 area INTELLIGENT EYE 1 sec Sampling 20 msec High ...

Page 77: ... in both areas A and B Shift the airflow direction to area B left side 2 Human detection signal ON in area A Shift the airflow direction to area B left side 3 Human detection signal ON in area B Shift the airflow direction to area A right side 4 Human detection signal OFF in both areas A and B No change When the human detection signal is OFF for 20 minutes in both areas A and B the unit starts ene...

Page 78: ...duced by 60 rpm when no one is in the area When there is no signal from the motion sensor in 20 minutes the microcomputer judges that nobody is in the room and operates the unit at a temperature shifted from the target temperature Cooling Dry 1 2 C 1 8 3 6 F higher Heating 2 C 3 6 F lower Auto according to the operation mode at that time 1 sec Sampling 20 msec High Low ON OFF High Low R24035 Condi...

Page 79: ...l Ex POWERFUL operation in cooling During POWERFUL operation the cooling heating efficiency of the other rooms may be slightly reduced POWERFUL operation cannot be used together with ECONO COMFORT AIRFLOW or OUTDOOR UNIT QUIET operation Operation mode Fan speed Target temperature COOL H tap A rpm 18 C 64 4 F DRY Dry rotating speed A rpm Lowered by 2 2 5 C 3 6 4 5 F HEAT H tap A rpm 30 31 5 C 86 88...

Page 80: ...of the indoor unit Operating status can be monitored even in automatic operation in accordance with the actual operation mode The lamp color changes according to the operation AUTO Red Blue DRY Green COOL Blue HEAT Red FAN White TIMER Orange Brightness Setting Each time Brightness button on the remote controller is pressed the brightness of the multi monitor lamp changes to high low or off Multi m...

Page 81: ...t the clock to the current day of the week 3 Press CLOCK button blinks 4 Press SELECT or SELECT button to set the clock to the present time Holding down SELECT or SELECT button rapidly increases or decreases the time display 5 Press CLOCK button to set the clock Point the remote controller at the indoor unit when pressing the button blinks and clock setting is completed R18281 SELECT button CLOCK ...

Page 82: ...e timer settings are used from Monday through Friday while different timer settings are used for the weekend Make timer settings for programs Tuesday to Friday Saturday Sunday Program 1 Program 2 Program 3 Program 4 Use the copy mode to make settings for Tuesday to Friday because these settings are the same as thoseforMonday Program 1 Program 2 Program 3 Program 4 No timer settings Make timer sett...

Page 83: ...layed 1 to 4 settings can be made per day Pressing changes the reservation number and the day of the week 3 Press The day of the week and reservation number will be set and blink 4 Press to select the desired mode Pressing changes the or setting in sequence ON TIMER OFF TIMER blank No Setting Pressing puts the sequence in reverse 5 Press 2 Press to select the desired day of the week and reservatio...

Page 84: ...ocedure from STEP 4 is displayed on the LCD and WEEKLY TIMER operation is activated The TIMER lamp periodically lights orange The multi monitor lamp will not light orange if all the reservation settings are deleted A reservation made once can be easily copied and the same settings used for another day of the week Refer to Copy mode Notes on WEEKLY TIMER operation Do not forget to set the clock on ...

Page 85: ...opied The whole reservation of the selected day of the week will be copied Be sure to direct the remote controller toward the indoor unit and check for a receiving tone and blinking of the multi monitor lamp The multi monitor lamp blinks twice The reservation will be copied to the selected day of the week The whole reservation of the selected day of the week will be copied To continue copying the ...

Page 86: ... setting mode Proceed to Setting mode STEP 4 is displayed on the LCD and WEEKLY TIMER operation is activated The TIMER lamp periodically lights orange The multi monitor lamp will not light orange if all the reservation settings are deleted disappears from the LCD The TIMER lamp goes off To reactivate the WEEKLY TIMER operation press again If a reservation deactivated with is activated once again t...

Page 87: ...Press to select the day of the week and the reservation number to be deleted and or blink Pressing changes the ON OFF TIMER mode in sequence Selecting blank will cancel any reservation you may have This function can be used for deleting reservations for each day of the week It can be used while confirming or setting reservations Be sure to direct the remote controller toward the indoor unit and ch...

Page 88: ...ignal Receiving Sign When the indoor unit receives a signal from the remote controller the unit emits a signal receiving sound and the operation lamp blinks 2 14 3 Indoor Unit ON OFF Switch ON OFF switch is provided on the display of the unit Press ON OFF switch once to start operation Press once again to stop it ON OFF switch is useful when the remote controller is missing or the battery has run ...

Page 89: ...re 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 It takes 3 minutes to restart the operation because 3 minute standby function is activated FVXS Series ON OFF switch R23926 ...

Page 90: ...ow direction is controlled automatically Actual operation may be different from what is displayed on the remote controller Room temperature is higher than the remote controller s set temperature in heating operation When defrosting in heating operation The airflow is discharged horizontally to avoid blowing cold air directly on the room occupants Under continuous operation with the airflow dischar...

Page 91: ...ction purposes The system may turn off the fan when the room temperature is satisfied It is normal for a delay to occur when changing the fan speed If the Auto is selected for the fan speed the fan speed varies automatically based on the difference between set temperature and room temperature R4003380 With Wireless Remote Controller BRC082A43 BRC082A41W BRC082A42W S Press FAN SPEED CONTROL button ...

Page 92: ...et temperature is divided into two zones Then the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Room thermistor temperature at start up Target temperature X Thermostat OFF point Y Thermostat ON point Z 24 5 C or more 76 1 F or more Room thermistor temperature at start up X 2 5 C X 4 5 F X 1 0 C X 1 8 F 16 5 24 C 61 7 75 2 F X...

Page 93: ...olding down the button causes the number to change continuously Press buttons to select Clock Calendar on the main menu screen Press Menu OK button to display the clock calendar screen Select Month with buttons Change the month with buttons Holding down the button causes the number to change continuously Select Day with buttons Change the day with buttons Holding down the button causes the number ...

Page 94: ...ons Change the minute with buttons Holding down the button causes the number to change continuously Press Menu OK button The confirmation screen will appear The date can be set between January 1 2015 and December 31 2099 Press button to select Y es on the confirmation screen Press Menu OK button to confirm the clock and return to the basic screen When setting the schedule the display returns to th...

Page 95: ...etback temperature setpoints can be configured Indicates that the setback function is disabled for this time period __ Indicates that the temperature setpoint and setback temperature setpoint for this time period is not specified The last active setpoint will be utilized 1 Press buttons to select Schedule Press Menu OK button to display the schedule screen The date time screen will appear 2 Before...

Page 96: ...rns 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 3 Press buttons to select Y es on the confirmation screen Pressing Menu OK button enters the daily patterns in the schedule and takes you back to the main menu screen R24074 ...

Page 97: ...hedule screen The settings screen will appear when Menu OK button is pressed 2 Press buttons to select the day to be set It cannot be selected in the case of EVDY 3 Input the time for the selected day Press buttons to move the highlighted item and press buttons to input the desired operation start time Each press of buttons moves the numbers by 1 hour or 1 minute ...

Page 98: ... temperature setpoint and setback temperature setpoint for this time period is not specified The last active setpoint will be utilized Indicates that the setback function is disabled for this time period 5 A maximum of five actions per day can be set Press Menu OK button when settings for each day are completed The confirmation screen will appear T o copy the settings for the previous day press Mo...

Page 99: ...ecomes active when the indoor unit is turned off by either the user a schedule event or an off timer Setback function is not available by default It can be enabled by the system installer 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 di...

Page 100: ...itch Error display Thermostat running OFF OFF ON ON ON OFF Drain pump ON OFF R24037 1 If the float switch turns ON again during the residual operation of the drain pump cooling operation also turns on again thermostat ON 2 If the float switch remains OFF even after the residual operation of the drain pump has ended the error code A3 is determined 3 The drain pump turns OFF once residual operation ...

Page 101: ...ON ON OFF ON OFF 5 min 5 sec 5 sec 5 min 5 min 5 sec R24611 Float switch Error display Thermostat running Drain pump A3 R24370 OFF Float Switch ON ON Thermostat running OFF ON A3 AF Error Display OFF ON Drain Pump OFF 1st 5 sec 5 sec 5 sec 5 sec 4th 5th 5 sec 5 min 5 min 5 sec 5 min 5 min 5 sec 5 min 5 min 5 sec 5 min 5 min 5 sec 5 sec 5 min 5 min 1 2 3 5 sec 1 If the float switch continues to tur...

Page 102: ...ure startup capacity Details R4003450 TH3 Temperature detected by the indoor heat exchanger thermistor R3T Defrost ending or oil return ending or Thermostat ON The fan is not OFF before initiating the hot start LL The fan is OFF before initiating the hot start OFF Hot start control Hot start in progress Normal operation Normal operation H M L remote controller setting LL OFF Remote controller sett...

Page 103: ...nabled only when decoration panel BYFQ60C2W1W S sensor kit BRYQ60A2W S and wired remote controller BRC1E73 are connected to the main unit and draft prevention is set to enabled on the wired remote controller Factory setting is disabled Draft prevention cannot be activated when individual flap control is set even if draft prevention is enabled on the wired remote controller Setting on the wired rem...

Page 104: ...ote controller Factory setting is disabled Setting on the remote controller R4003390 2 3 4 5 1 Press buttons to select Auto setback by Sensor Press Menu OK button to display Auto setback by Sensor menu Press buttons to select Enable Disable Press Menu OK button Press buttons to select Enable Press Menu OK button after selecting the item Then the confirmation screen is displayed Press buttons to se...

Page 105: ...tton to display Auto off by Sensor menu Press buttons to select Enable Press buttons to go into the auto off time setting Press buttons to set auto off hour s 1 24 Press Menu OK button Then the confirmation screen is displayed Press Cancel button for 4 seconds on the basic screen to display Service Settings menu Press buttons to select Energy Saving Options Press Menu OK button to display Energy S...

Page 106: ...troller 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 It takes 3 minutes to restart the operation because 3 minute standby function is activated 3 10 3 Emergency O...

Page 107: ...SiUS121827E SA Indoor Unit Functions Part 4 Functions and Control 101 FFQ Series Emergency operation switch R24077 ...

Page 108: ...t exchanger thermistor is used for detecting the disconnection of the discharge pipe thermistor When the discharge pipe temperature drops below the outdoor heat exchanger temperature by more than a certain value the discharge pipe thermistor is judged as disconnected In cooling operation the outdoor heat exchanger thermistor is used for high pressure protection 3 Outdoor Temperature Thermistor The...

Page 109: ... anti icing function If any of the following conditions are met in the room where operation halts it is assumed as icing The conditions are Tc 1 C 30 2 F Ta Tc 10 C 18 F where Ta is the room temperature and Tc is the indoor heat exchanger temperature The indoor heat exchanger thermistor is used for wiring error check function The refrigerant flows in order from the port A to detect the indoor heat...

Page 110: ... mode command which is set by each room in accordance with the procedure and determines the operation mode of the system The following procedure is taken when the modes conflict with each other 1 The system follows the mode which is set first First push first set 2 For the rooms where the different mode is set standby mode is activated The operation lamp blinks Air conditioner control mode Forced ...

Page 111: ...et as the lower limit frequency among the frequency lower limits of the following function Four way valve operation compensation draft prevention pressure difference upkeep 4 Determine prohibited frequency There is a certain prohibited frequency such as a power supply frequency Parameters Q value Indoor unit output determined from indoor unit volume airflow rate and other factors S value Indoor Un...

Page 112: ...me the frequency is adjusted according to maxΔD value When maxΔD value is low the frequency is lowered When maxΔD value is high the frequency is increased 3 Frequency control when other controls are functioning When frequency is dropping Frequency control is carried out only when the frequency drops For limiting lower limit Frequency control is carried out only when the frequency rises 4 Upper and...

Page 113: ...stopped the OFF delay switch of the four way valve is carried out Details OFF delay switch of four way valve The four way valve coil is energized for 150 seconds after the operation is stopped 4 4 3 Four Way Valve Operation Compensation Outline At the beginning of operation as the four way valve is switched the pressure difference to activate the four way valve is acquired when the output frequenc...

Page 114: ...e compressor from OFF to ON the upper limit of frequency is set as follows The function is not used when defrosting Cooling Heating A Hz 35 23 B Hz 48 48 C Hz 65 65 D Hz 83 83 E Hz 95 95 F seconds 120 G seconds 270 420 H seconds 290 450 J seconds 170 250 K seconds 150 220 sec Time R23251 Hz Frequency C D E B F G H J K A ...

Page 115: ...uency is set to keep the discharge pipe temperature from rising further Details Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequency is kept Reset zone The upper limit of frequency is canceled A 120 C 248 F B 111 C 231 8 F C 109 C 228 2 F D 107 C 224 6 F E 107 C 224 6 F Res...

Page 116: ...rrent remains in the stop zone for 2 5 seconds the compressor is stopped Dropping zone The upper limit of the compressor frequency is defined as operation frequency 2 Hz After this the output frequency is lowered by 2 Hz every second until it reaches the keep zone Keep zone The present maximum frequency goes on Reset zone Limit of the frequency is canceled Limitation of current dropping and stop v...

Page 117: ...FFQ09 12 15 18Q2VJU Outline During cooling operation the signal sent from the indoor unit determines the frequency upper limit and prevents freezing of the indoor heat exchanger The signals from the indoor unit is divided into zones Details The operating frequency limitation is judged with the indoor heat exchanger temperature R4003451 Reset zone Up zone Keep zone Dropping zone Stop zone 13 C 55 4...

Page 118: ...e freeze up protection control starts when any of the following conditions is satisfied The indoor heat exchanger temperature remains at A or lower for 1 minute The accumulated time that the indoor heat exchanger temperature remains at B or lower reaches 40 minutes Accumulated timer clearing condition The indoor heat exchanger temperature remains at C or higher for 20 minutes Ending condition The ...

Page 119: ... The maximum value of the indoor heat exchanger temperature controls the following excluding the rooms not in operation Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequency is kept Up zone The upper limit of frequency increases Reset zone The upper limit of frequency is can...

Page 120: ...ing indoor outdoor unit quiet operation The rotation speed of the outdoor fan is reduced by the command of the indoor outdoor unit quiet operation 8 Fan ON OFF control when operation cooling heating dry starts stops The outdoor fan is turned ON when the operation starts The outdoor fan is turned OFF when the operation stops 4 10 Liquid Compression Protection Function Outline The compressor stops a...

Page 121: ...0 N pulse 480 P pulse 240 Q pulse 240 Frequency Compressor Four way valve Fan ON OFF ON OFF ON OFF 0 Hz 0 Hz D Hz E Hz 5 sec PI control 5 sec J sec R21926 F sec G sec H sec Electronic expansion valve opening operating room Electronic expansion valve opening stop room Normal control K pulse zone N pulse zone L pulse zone M pulse zone Starting control Normal control P pulse zone Q pulse zone Startin...

Page 122: ...perature control with all ports connected and all rooms being air conditioned 4 Liquid pipe temperature control for rooms not in operation 5 Dew prevention control for indoor rotor Open Control 1 Electronic expansion valve control when starting operation 2 Electronic expansion valve control when the frequency changes 3 Electronic expansion valve control for defrosting 4 Electronic expansion valve ...

Page 123: ...rn When power is turned on Cooling 1 room operation Cooling 2 rooms operation to Cooling 4 rooms operation Stop Heating 1 room operation Heating 2 rooms operation Stop Heating operation Discharge pipe thermistor disconnection control Stop 2 2 2 1 1 1 3 3 3 Gas pipe isothermal control SC subcooling control Control when the frequency changes Control for abnormally high discharge pipe temperature Oil...

Page 124: ...n Room The electronic expansion valve opening is controlled when the operation starts thus preventing superheating or liquid compression 4 13 5 Control when the Frequency Changes When the target discharge pipe temperature control is active if the target frequency changes to a specified value in a certain period of time the target discharge pipe temperature control is canceled and the target openin...

Page 125: ... exchanger temperature When the thermistor is disconnected When the disconnection is ascertained the compressor continues operation for 9 minutes and then stops 4 13 9 Gas Pipe Isothermal Control During Cooling When the units are operating in multiple rooms the gas pipe temperature is detected and the electronic expansion valve opening is adjusted so that the temperature of the gas pipe in each ro...

Page 126: ...charge pipe temperature The electronic expansion valve opening and the target discharge pipe temperature are adjusted every 15 seconds The target discharge pipe temperature is controlled by indoor heat exchanger temperature and outdoor heat exchanger temperature The opening degree of the electronic expansion valve is adjusted by the following Target discharge pipe temperature Actual discharge pipe...

Page 127: ...ops 4 14 3 Refrigerant Shortage Control Outline If the power consumption is below the specified value and the frequency is higher than the specified frequency it is regarded as refrigerant shortage The power consumption is low comparing with that in the normal operation when refrigerant is insufficient and refrigerant shortage is detected by checking power consumption R4003425 Refer to Refrigerant...

Page 128: ...r 123 2 ARC466A36 124 3 ARC452A21 126 4 ARC452A23 128 5 ARC466A21 130 6 BRC944B2 Wired Remote Controller 132 7 BRC1E73 Wired Remote Controller 133 8 BRC082A43 Wireless Remote Controller 139 9 BRC082A41W BRC082A42W S Wireless Remote Controller 141 Part 5 Remote Controller ...

Page 129: ...ogin Indoor Unit Type Model Name Wireless R C Reference Page Wired R C Reference Page RA FTXR09TVJUW S ARC466A36 124 BRC944B2 132 FTXR12TVJUW S FTXR18TVJUW S CTXG09QVJUW S CTXG12QVJUW S CTXG18QVJUW S CTXS07LVJU ARC452A21 126 FTXS09LVJU FTXS12LVJU FTXS15LVJU FTXS18LVJU FTXS24LVJU FDXS09LVJU ARC452A23 128 FDXS12LVJU CDXS15LVJU CDXS18LVJU CDXS24LVJU FVXS09NVJU ARC466A21 130 FVXS12NVJU FVXS15NVJU FVXS...

Page 130: ...If there is anything to block signals between the unit and the remote controller such as a curtain the unit will not operate The maximum distance for communication is about 19 11 16 ft 6 m Make sure that there are no obstacles within 19 11 16 inch 50 cm under the signal receiver Such obstacles if any may have an adverse influence on the reception performance of the receiver and the reception dista...

Page 131: ... UNIT QUIET operation is not available in FAN and DRY operation OUTDOOR UNIT QUIET operation and ECONO operation cannot be used at the same time with POWERFUL operation Priority is given to the function you pressed last Econo 4 Quiet button Blank No setting Combination Comfort Sensor button COMFORT AIRFLOW Operation 2 INTELLIGENT EYE Operation 3 INTELLIGENT EYE COMFORT AIRFLOW Every time you press...

Page 132: ... unit quiet operation operation sound becomes weak The airflow rate also decreases In DRY operation the airflow rate setting is not available Selects the airflow rate setting every time you press this button R24595 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 ...

Page 133: ...e timer setting Cannot be used for the WEEKL Y TIMER operation blank No Setting Combination Press this button and adjust the day and time with SELECT button Press this button again to complete TIMER setting COMFORT 2 SENSOR 3 button INTELLIGENT EYE COMFORT AIRFLOW Every time you press COMFORT SENSOR button the setting changes in the following order Starts OUTDOOR UNIT QUIET operation OUTDOOR UNIT ...

Page 134: ...et operation operation sound becomes weak The airflow rate also decreases In DRY operation the airflow rate setting is not available Selects the airflow rate setting every time you press this button R24596 Changes the temperature setting TEMPERATURE adjustment buttons AUTO DRY COOL HEAT FAN 18 30 C 64 86 F Not available 18 32 C 64 90 F 10 30 C 50 86 F Not available Receiver To use the remote contr...

Page 135: ...on Changes the ON OFF TIMER settings TIMER CANCEL button Cancels the timer setting Press this button and adjust the time with SELECT button Press this button again to complete TIMER setting QUIET 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 Priori...

Page 136: ...with all its displays on for the purpose of explanation T o 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 Fan setting button In indoor unit quiet operation operation sound becomes weak The airflow rat...

Page 137: ...WEEKLY TIMER settings Timer Cancel button Cancels the timer setting Cannot be used for the WEEKL Y TIMER operation Press this button and adjust the day and time with Select button Press this button again to complete TIMER setting Quiet button Starts OUTDOOR UNIT QUIET operation OUTDOOR UNIT QUIET operation is not available in FAN and DRY operation OUTDOOR UNIT QUIET operation and POWERFUL operatio...

Page 138: ...Controller Caution 6 BRC944B2 Wired Remote Controller R5000214 This remote controller cannot be used together with a standard wireless remote controller Otherwise what appears on this remote controller s display may fail to correspond to actual operating conditions ...

Page 139: ...ontroller 133 7 BRC1E73 Wired Remote Controller R5000168 3 Menu OK button 8 On Off button 10 Cancel button 9 Operation lamp 11 LCD with backlight 4 Up button 5 Down button 6 Right button 7 Left button 1 Operation mode selector button 2 Fan speed control button ...

Page 140: ... The backlight will be illuminated for approximately 30 seconds by pressing any button If two remote controllers are used to control a single indoor unit only the controller accessed first will have backlight functionality Press this button to select the fan speed of your preference Available fan speeds vary with the indoor unit model Used to enter the main menu Used to enter the selected item Use...

Page 141: ...et by default Detailed and Simple displays can be selected in the main menu 10 Changeover controlled by the master indoor unit 9 Under centralized control 4 Stand by for Defrost Hot start The airflow direction clock and selectable item appear on Detailed display screen in addition to the items appearing on Standard display Displayed only when the indoor unit is turned on with no fan speed control ...

Page 142: ...splay example 2 Fan speed 3 Setpoint 1 Operation mode 11 Setback 14 Selectable Display Item 4 Stand by for Defrost Hot start 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 Note for all display modes ...

Page 143: ...ntroller is limited Displayed when another indoor unit on the system has the authority to change the operation mode between cool and heat Displayed when an energy recovery ventilator is connected Ventilation Mode icon These icons indicate the current ventilation mode ERV only AUTO ERV BYPASS Air Purify ICON This icon indicates that the air purifying unit Optional is in operation Used to display th...

Page 144: ...ed indoor unit model does not include oscillating louvers this item will not be displayed Displayed if the clock is set If the clock is not set will be displayed 12 hour time format is displayed by default Select 12 24 hour time display option in the main menu under Clock Calendar Room temperature is selected by default For other choices see the operation manual Displayed when the clock needs to b...

Page 145: ...C082A43 Wireless Remote Controller R25006 7 9 12 10 11 13 14 15 8 1 3 4 5 2 6 DOWN FAN UP ON OFF M H L hr hr TEST MODE TIMER RESERVE CANCEL DOWN UP TEST FAN TIME TEMP ON OFF M H L hr hr TEST F F The situation which opened the front cover of the remote control R25007 18 19 21 16 20 17 ...

Page 146: ...hoice TEMPERATURE SETTING BUTTON Use this button for SETTING TEMPERATURE Operates with the front cover of the remote controller closed PROGRAMMING TIMER BUTTON Use this button for programming START and or STOP time Operates with the front cover of the remote controller opened TIMER MODE START STOP BUTTON TIMER RESERVE CANCEL BUTTON OPERATION MODE SELECTOR BUTTON Press this button to select OPERATI...

Page 147: ...SiUS121827E BRC082A41W BRC082A42W S Wireless Remote Controller Part 5 Remote Controller 141 9 BRC082A41W BRC082A42W S Wireless Remote Controller R23936 R23937 ...

Page 148: ...ll start Press the button again and the system will stop Press this button to select the fan speed LOW MEDIUM or HIGH of your choice Use this button for setting temperature TIMER MODE START STOP BUTTON TIMER RESERVE CANCEL BUTTON AIRFLOW DIRECTION ADJUST BUTTON OPERATION MODE SELECTOR BUTTON FILTER SIGN RESET BUTTON INSPECTION TEST OPERATION BUTTON EMERGENCY OPERATION SWITCH RECEIVER OPERATION LAM...

Page 149: ...en Close Fault 173 5 6 Signal Transmission Error Between Indoor Unit and Outdoor Unit 174 5 7 Mismatching of Indoor Unit and Outdoor Unit 177 6 Troubleshooting for SA Indoor Unit 178 6 1 Indoor Unit PCB Abnormality 178 6 2 Drain Level Control System Abnormality 179 6 3 Indoor Fan Motor or Related Abnormality 180 6 4 Indoor Fan PCB Abnormality 185 6 5 Humidifier or Related Abnormality 186 6 6 Therm...

Page 150: ...on Sensor Abnormality 221 7 16 Thermistor or Related Abnormality Outdoor Unit 224 7 17 Electrical Box Temperature Rise 226 7 18 Radiation Fin Temperature Rise 227 7 19 Output Overcurrent Detection 229 8 Check 232 8 1 Thermistor Resistance Check 232 8 2 Indoor Fan Motor Connector Check 233 8 3 Hall IC Check 234 8 4 Power Supply Waveform Check 235 8 5 Electronic Expansion Valve Check 236 8 6 Four Wa...

Page 151: ...peration Operation lamp OFF Check the outdoor temperature Heating cooling operations are not available when the outdoor temperature is out of the operation limit Check the reference page for the operation limit 292 Diagnose with remote controller indication 162 163 Some indoor units do not operate Check the type of the indoor units Check if the indoor unit type is compatible with the outdoor unit ...

Page 152: ... protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions A signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages FTXR CTXG Series CTXS FTXS Series FDXS CDXS Series Operation lamp multi monitor lamp R24043 R23939 Operation lamp green R23940 Operation lamp green ...

Page 153: ... is installed When the error occurs the operation lamp on the receiver blinks R4003517 FFQ series with BRC082A41W BRC082A42W S wireless remote controller In case of wireless remote controller a transmitter board A2P and a receiver A3P are installed on indoor unit When the error occurs the operation lamp on the receiver A3P blinks Operation lamp green Operation lamp green The error or warning messa...

Page 154: ...on mode and confirm that the operation lamp is not blinking 3 Moreover when the operation mode is automatic set all the indoor unit operation mode as cooling or heating and check again if the operation lamp is normal If the lamp stops blinking after the above steps there is no malfunction Operation stops and operation lamp blinks only for the indoor unit that has a different operation mode set lat...

Page 155: ...on the PCB When the microcomputer works in order the LED A blinks and when the system is in normal condition the red LEDs are OFF Even after the error is canceled and the unit operates in normal condition the LED indication remains R6000447 Refer to page 54 for the location of LED A 1 2 3 4 5 LED A LED 1 LED 2 LED 3 LED 4 LED 5 Service monitor PCB ...

Page 156: ...two consecutive beeps indicate non corresponding codes 2 To return to the normal mode hold TIMER CANCEL button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the normal mode 3 Not all the error codes are displayed When you cannot find the error code try method 2 Refer to page 151 No Code No Code No Code 1 00 13 C7 25 UA 2 U4 14 A3 26 UH 3 L5 15 H8...

Page 157: ...ps or the long beep 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 Long beep Both the left side and right side number correspond with the error code The numbers indicated when you hear the long beep are the error code Refer to page 162 163 4 Press...

Page 158: ...de number does not Long beep Both the left side and right side number corresponds with the error code 7 Determine the error code The numbers indicated when you hear the long beep are the error code Refer to page 162 163 8 Press MODE button to exit from the diagnosis mode The display T means the trial operation mode Refer to page 251 for trial operation 9 Press ON OFF button twice to return to the ...

Page 159: ...s indicate non corresponding codes 2 To return to the normal mode hold Timer Cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the normal mode 3 Not all the error codes are displayed When you cannot find the error code try method 2 Refer to page 154 No Code No Code No Code No Code 1 00 11 H6 21 C5 30 H7 2 A5 12 H0 22 J3 31 U2 3 E7 13 A6...

Page 160: ... Press Mode button to enter the service check mode The left side number blinks 4 Press Temp or Temp button and change the number until you hear the two consecutive beeps or the long beep 5 Diagnose by the sound Beep The left side number does not correspond with the error code Two consecutive beeps The left side number corresponds with the error code but the right side number does not R24046 R11821...

Page 161: ...e sound Beep The left side number does not correspond with the error code Two consecutive beeps The left side number corresponds with the error code but the right side number does not Long beep Both the left side and right side numbers correspond with the error code 9 Determine the error code The numbers indicated when you hear the long beep are the error code Refer to page 162 163 10 Press Mode b...

Page 162: ...to Clean Maintenance Information Configuration Current Settings Clock Calendar Daylight Saving Time Language Press Cancel button once Press Menu OK button once Basic Screen Operation mode changeover Fan speed control Menu display Confirmation of each setting On Off Cancel Operation lamp Press Cancel button for 4 seconds or more Press Cancel button once Press Cancel button for 4 seconds or more Pre...

Page 163: ...button Operation lamp 2 Error Code A1 Contact Info 0123 456 7890 Indoor Model 000 Outdoor Model 000 If an error occurs either one of the following items will flash in the basic screen The Operation lamp will flash For Simple display the message is not displayed and only the Operation lamp flashes The Operation lamp will not flash For Simple display the message is not displayed and the Operation la...

Page 164: ...thers Following codes can be checked z Error codes z Indoor model code Service data can be obtained z Error code history z Temperature data of various sections Service settings can be made z Forced fan ON z Airflow rate setting Press INSPECTION TEST OPERATION button once Press ON OFF button within 10 seconds to start test operation Test operation will stop automatically after 15 30 minutes Thermos...

Page 165: ...t indication of the error code blinks Step Action UP button DOWN button R15408 If you hear Then 3 short beeps Follow all steps below e h t e u n i t n o C 4 d n a 3 s p e t s w o l l o F p e e b t r o h s 1 operation in step 4 until you hear a long beep This long beep indicates that the error code is confirmed y t i l a m r o n b a o n s i e r e h T p e e b g n o l 1 R24051 OPERATION MODE SELECTOR...

Page 166: ...DE SELECTOR button The right 0 lower digit indication of the error code blinks Step Action UP button DOWN button R15411 UP DOWN 4 5 6 7 8 9 U P L J F H E C A 0 If you hear Then 2 short beeps The upper digit matches h c t a m s t i g i d o N p e e b t r o h s 1 h c t a m s t i g i d r e w o l d n a r e p p u h t o B p e e b g n o l 1 R24052 OPERATION MODE SELECTOR button ...

Page 167: ...ELECTOR 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 Step Action UP button DOWN button R15413 UP DOWN F E J C H A 9 8 7 6 5 4 3 2 1 0 If you hear Then 2 short beeps No digits match h c t a m s t i g i d r e w o l d n a r e p p u h t o B p e e b g n o l 1 R24053 OPERATION MODE SELECTOR button ...

Page 168: ...nd outdoor unit 174 UA Mismatching of indoor unit and outdoor unit 177 Error Codes Description Reference Page 00 Normal condition A1 Indoor unit PCB abnormality 178 A3 Drain level control system abnormality 179 A6 Indoor fan motor DC motor or related abnormality See the Note below 180 182 A8 Indoor fan PCB abnormality 185 AF Humidifier or related abnormality 186 C4 Indoor heat exchanger thermistor...

Page 169: ...i icing control in other rooms 201 j h h i i h U0 Refrigerant shortage 195 j i h h i h U2 Low voltage detection or over voltage detection 198 j h i h h h U3 Wiring error check unexecuted 200 j i h i i h A5 Anti icing control for indoor unit 202 j i i i h h E1 Outdoor unit PCB abnormality 204 j i h i h h E5 OL activation compressor overload 205 j h i i h h E6 Compressor lock 208 j i i i i h E7 DC f...

Page 170: ...mality 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 Supposed Causes Wrong models interconnected Defective indoor unit PCB Disconnection of connector Reduction of power supply voltage ...

Page 171: ...and outdoor unit matched YES NO NO YES NO NO YES R23407 Caution To secure the connection disconnect the connectors once and then reconnect YES NO YES NO YES NO YES Match the compatible models Correct the power supply Replace the indoor unit PCB control PCB Completed Completed Correct the power supply Replace the indoor unit PCB control PCB Completed Be sure to turn off the power switch before conn...

Page 172: ... Heating peak cut control During heating operation the indoor heat exchanger temperature is above 65 C 149 F Supposed Causes Short circuited air Clogged air filter of the indoor unit Dust accumulation on the indoor heat exchanger Defective indoor heat exchanger thermistor Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 232 NO NO NO Check No 01 Check the indoor heat exchanger therm...

Page 173: ...he 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 and is less than 50 of the maximum fan motor rotation speed Supposed Causes Remarkable decrease in power supply voltage Layer short inside the fan motor winding Breaking...

Page 174: ...ctor Replace the indoor fan motor Replace the indoor unit PCB control PCB Replace the indoor unit PCB control PCB Does the fan rotate smoothly Does the fan rotate Motor power supply voltage 310 340 VDC Turn off the power and rotate the fan by hand Turn on the power and start operation Check No 02 Check the output of the fan motor connector R22444 YES NO YES NO YES NO Replace the indoor fan motor R...

Page 175: ...SiUS121827E Troubleshooting for RA Indoor Unit Part 6 Service Diagnosis 169 Note Reference The rotation pulse is the feedback signal from the indoor fan motor Check No 02 Refer to P 233 ...

Page 176: ...cted 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 Supposed Causes Power supply voltage out of specification Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defective capacit...

Page 177: ...oor fan motor Replace the indoor unit PCB control PCB Replace the indoor fan motor Replace the capacitor Replace the indoor unit PCB control PCB Replace the indoor fan motor Replace the indoor unit PCB control PCB Measure the voltage between the black and white lead wires of the fan motor and check if the maximum voltage reaches the rated voltage Check No 04 Check Hall IC Is there an output Check ...

Page 178: ...uses Disconnection of connector Defective thermistor s Defective indoor unit PCB Troubleshooting C4 Indoor heat exchanger thermistor C9 Room temperature thermistor Check No 01 Refer to P 232 When replacing the defective thermistor s replace the thermistor as ASSY YES R21870 NO Check No 01 Check the thermistor resistance value YES NO Caution Correct the connection Replace the defective thermistor s...

Page 179: ...el 3 Turn on the power Wait until the initialization finishes Operate the unit by the indoor unit ON OFF button YES YES YES YES NO NO NO NO Replace the harness and reduction motor Replace the assembly of the front panel mechanism Check the movement of the right and left separately by hand Replace the assembly of the front panel mechanism It is supposed such as deformation of the panel or stuffed d...

Page 180: ...r 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 Supposed Causes Reduction of power supply voltage Wiring error Breaking of the connection wires between the indoor and outdoor units wire No 3 Defective outdoor unit PCB Short circuit inside the fan motor winding Defective indoor un...

Page 181: ...t and the outdoor unit Replace the outdoor unit PCB main PCB Replace the connection wires between the indoor unit and outdoor unit Is LED A blinking Properly insulated Is there any disturbance Is there any wiring error Check the connection wires between the indoor unit and the outdoor unit Check the LED A on the outdoor unit PCB Be sure to turn off the power switch before connecting or disconnecti...

Page 182: ...Troubleshooting for RA Indoor Unit SiUS121827E 176 Part 6 Service Diagnosis Reference Check No 11 Refer to P 235 ...

Page 183: ...Wrong models interconnected Wrong wiring of connecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R23001 Caution NO YES YES NO Match the compatible models OK Correct the connection Check the part numbers of the indoor and outdoor unit PCB with the Parts List If not matched change for the correct PCB Are the connectin...

Page 184: ... can be erased either within the computer or externally and usually requires more voltage for erasure than the common 5 volts used in logic circuits It functions like non volatile RAM but writing to EEPROM is slower than writing to RAM Supposed Causes Defective indoor unit PCB External factor noise etc Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting ...

Page 185: ...e sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Connect the drain pump Replace the indoor unit PCB control PCB Replace the drain pump There is a drain system abnormality Connect the float switch Replace the float switch Replace the indoor unit PCB control PCB R25079 NO YES NO NO YES YES Is the drain pump connected to X25A on the indoor unit...

Page 186: ...ors Disconnection of the connector between the indoor unit PCB and the fan PCB Defective fan PCB Defective fan motor No fuse continuity Trouble Shooting R6000547 Connect the connector correctly Turn OFF the power supply and wait for 10 minutes NO YES NO Connect the connector correctly NO YES YES Replace the fuse There is a continuity in the fuse 2 on the fan PCB or fan motor harness NO The fan mot...

Page 187: ...eplace the fan motor Each resistance between the pins is equal to or lower than 1 Ω Replace the fan motor Replace the fan PCB A2P The HAP lamp on the indoor unit control PCB is blinking while the HAP lamp on the fan PCB is not blinking YES YES Check the fan motor connectors Check No 02 Replace the fan PCB A2P p When A6 abnormality still reoccurs replace the fan motor A Turn ON the power supply whi...

Page 188: ...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 Supposed Causes Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defective indoor unit PCB ...

Page 189: ...connector YES YES NO NO Note The motor may break when the motor connector is disconnected while the power is turned on Be sure to turn off the power before reconnecting the connector Replace the indoor unit PCB control PCB Replace the indoor unit PCB control PCB Motor power supply voltage 290 330 VDC or more R24054 YES NO Replace the indoor unit PCB control PCB Replace the indoor fan motor Motor c...

Page 190: ...Troubleshooting for SA Indoor Unit SiUS121827E 184 Part 6 Service Diagnosis Reference Check No 02 Refer to P 233 ...

Page 191: ... the power switch before connecting or disconnecting connectors or parts may be damaged Check for the indoor unit control PCB A1P and the fan PCB A2P Connect the connector correctly NO YES YES Is the connector X3A on the fan PCB connected correctly Connect the connector correctly NO YES Is the connector X70A on the indoor unit control PCB connected correctly Replace the harness YES Is the harness ...

Page 192: ...difier s Clogged electric expansion value in humidifier s Defective indoor unit PCB Troubleshooting The system continues to operate with the thermostat OFF even while the error code is displayed YES YES NO NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged The float switch may be defective Check if the drain up height and the horiz...

Page 193: ...eck the thermistors proceed as follows 1 Disconnect the thermistor from the indoor unit PCB 2 Read the temperature and the resistance value 3 Check if the measured values correspond with the values in the table of thermistor resistance check C4 Indoor heat exchanger thermistor 1 liquid pipe R2T C5 Indoor heat exchanger thermistor 2 R3T C9 Room temperature thermistor R1T When replacing the defectiv...

Page 194: ...nsor kit PCB Troubleshooting If the cause of the problem is related to the sensors the sensors should be checked prior to changing the indoor unit PCB When replacing the defective sensor s replace the sensor kit as ASSY R24577 YES NO Check the connection of connectors on the sensor kit YES NO Caution Correct the connection Connect the connectors properly Normal Normal Turn off the power Then turn ...

Page 195: ...t is running Supposed Causes Defective room temperature thermistor in the wired remote controller Defective wired remote controller PCB External factor such as noise Troubleshooting To delete the record of error codes press ON OFF button on the remote controller for 4 seconds or more while the error code is displayed in the inspection mode Replace the remote controller External factor other than e...

Page 196: ... is normal Error Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of the data is abnormal Supposed Causes Power supply voltage out of specification Reduction of power supply voltage Wiring error Breaking of the connection wires between the indoor and outdoor units wire No 3 Defective outdoor unit PCB Short circuit inside the fan motor winding Defec...

Page 197: ... the indoor unit and the outdoor unit Replace the outdoor unit PCB main PCB Replace the connection wires between the indoor unit and outdoor unit Is LED A blinking Properly insulated Is there any disturbance Is there any wiring error Check the connection wires between the indoor unit and the outdoor unit Check the LED A on the outdoor unit PCB Be sure to turn off the power switch before connecting...

Page 198: ...s 267 and 268 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Are both remote controllers set to MAIN Do the service monitors of all the indoor units blink Does operation return to normal when the power is turned off momentarily NO NO YES YES NO Replace the indoor unit PCB control PCB Set 1 remote controller to SUB turn the power s...

Page 199: ...llers when using 2 remote controllers Defective remote controller PCB Troubleshooting For the way to change MAIN SUB setting of remote controllers refer to pages 267 and 268 Turn the power off and then back on If a malfunction occurs replace the remote controller Turn the power off and then back on If a malfunction occurs replace the remote controller Set one remote controller to MAIN turn the pow...

Page 200: ...rect wiring Check again YES YES NO NO Connect the indoor outdoor units correctly YES YES YES YES NO NO NO Blink R24591 Is the combination of indoor outdoor units correct Do the service monitors of all the indoor units blink Are the wirings between indoor unit and outdoor unit correctly connected Connect the wirings correctly NO Is the optional units power supply connected from the indoor unit term...

Page 201: ...ions The following conditions continue for 7 minutes Input current A output frequency B Output frequency C If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes The installation space not large enough Dirty outdoor heat exchanger Defective outdoor fan motor Disconnection of the discharge pipe thermistor indoor or ou...

Page 202: ...ing and correct as required Also replace any cracked pipes Check the connection of the power transistor harness Also replace any cracked pipes Oil leak at internal piping Stop valve closed Compressor vibrating too much Oil leak at relay pipe connections Any thermistor disconnected Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Replace the...

Page 203: ...19 Refer to P 241 NG YES NO Change for a specified amount of fresh refrigerant NO Check No 12 Electronic expansion valve functioning Replace the electronic expansion valve YES Replace the defective thermistor s Completed Refrigerant shortage error again Check No 01 Check the thermistors OK NO YES Replace the outdoor unit PCB main PCB Replace the compressor Completed Error again Continued from the ...

Page 204: ...econds Outdoor Unit Low voltage detection The voltage detected by the DC voltage detection circuit is below 180 V for 0 1 second If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Over voltage detection An over voltage signal is fed from the over voltage detection circuit to the microcomputer The compressor stops if the error oc...

Page 205: ...k the power supply voltage Check the connection of the compressor harness Disturbance factors Noise Power supply distortion Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Replace the indoor unit PCB control PCB Turn on the power System restarted Repeat a few times Error again within 3 minutes after turning on the power Loose or disconnected NO...

Page 206: ...or check after the memory was cleared Supposed Causes The wiring error switch SW3 may have been pressed for 10 seconds or more and the memory may have been deleted The unit cannot be operated unless wiring error check is executed Troubleshooting Refer to Wiring Error Check Function on page 249 for details R23952 Caution NO YES Wiring error check executed Conduct wiring error check Wiring error che...

Page 207: ...r and outdoor units Supposed Causes Anti icing function in other rooms Power supply voltage out of specification Wrong models interconnected Wrong indoor unit PCB or outdoor unit PCB mounted Troubleshooting Refer to Anti icing control for indoor unit on page 202 for details R21922 Caution NO YES NO YES NO YES Check the model combination Error displayed while operating Power supply voltage as speci...

Page 208: ...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 A Room temperature Indoor heat exchanger temperature 10 C 18 F B Indoor heat exchanger temperature 1 C 30 2 F If the error repeats the system is shut down Reset condition 3 minute standby is over and the indoor heat exchanger temperature is above 0 C 32 F Supposed C...

Page 209: ...ve or coil Replace the outdoor heat exchanger thermistor Replace the room temperature thermistor Replace the room temperature thermistor or indoor heat exchanger thermistor Do the vacuum drying Replace the indoor unit PCB control PCB and then start the wiring error check function Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check the wi...

Page 210: ...r is in abnormal running order Supposed Causes Defective outdoor unit PCB Noise Momentary drop of voltage Momentary power failure Troubleshooting R21809 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES NO NO YES Replace the outdoor unit PCB main PCB Ground the system The cause can be external factors other than malfunction Inves...

Page 211: ...e error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of discharge pipe thermistor Defective discharge pipe thermistor Disconnection of connector S40 Disconnection of 2 terminals of OL Q1L Defective OL Q1L Broken OL harness Defective electronic expansion valve or coil Defective four way valve or coil Defect...

Page 212: ...e electronic expansion valve or the coil Refer to the refrigerant line check procedure Replace the outdoor unit PCB main PCB Replace the four way valve or the coil Replace the outdoor unit PCB main PCB Discharge pipe thermistor disconnected Check No 01 Check the discharge pipe thermistor Check No 13 Check the four way valve Check No 14 Check the refrigerant line Check No 12 Check the electronic ex...

Page 213: ...SiUS121827E Troubleshooting for Outdoor Unit Part 6 Service Diagnosis 207 Reference Reference Check No 13 Refer to P 237 Check No 14 Refer to P 237 ...

Page 214: ...ompressor 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 Reset condition Continuous run for about 5 minutes without any other error Supposed Causes Closed stop valve Defective outdoor unit PCB Defective compressor Defe...

Page 215: ... and restart the system Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Correct the power supply or replace the outdoor unit PCB main PCB Open the stop valve Inverter analyzer RSUK0917C Replace the compressor Replace the compressor Check the electronic expansion valve coil Go to Check No 12 Any LED off Stop valve closed Emergency stop without c...

Page 216: ...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 Reset condition Continuous run for about 5 minutes without any other error Supposed Causes Disconnection of the fan motor Foreign matter stuck in the fan Defective fan motor Defective outdoor...

Page 217: ...ulse input on the outdoor unit PCB main PCB Turn off the power and reconnect the connector Remove the foreign matters Replace the outdoor fan motor Replace the outdoor unit PCB main PCB Fan motor connector disconnected Foreign matters in or around the fan Replace the outdoor fan motor Fan rotates smoothly Pulse signal generated Be sure to turn off the power switch before connecting or disconnectin...

Page 218: ...on 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 Defective compressor Defective power module Defective outdoor unit PCB Short circuit ...

Page 219: ...rent after the wires have been disconnected and reconnected for part replacement check the R21863 NO YES YES NO Start operation and measure the input current Check No 18 Check the discharge pressure Check No 17 Check the installation condition Check No 15 Check with the inverter analyzer Turn off the power and disconnect the harnesses U V and W Turn off the power and reconnect the harnesses Turn o...

Page 220: ...Conditions The following condition continues for A seconds after the compressor has started Cooling operation The lowest liquid pipe temperature among the rooms in operation Tde 45 C 113 F Heating operation The highest liquid pipe temperature among the rooms in operation Tde 0 C 32 F Tde outdoor heat exchanger temperature Supposed Causes Disconnection of four way valve coil Defective four way valv...

Page 221: ...our way valve defective or dust clogged Reconnect the thermistor s Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R20405 Refrigerant shortage Water mixed Stop valve Four way valve coil disconnected loose Harness disconnected Any thermistor disconnected Check No 01 Check the thermistors Check No 14 Check the refrigerant line Check ...

Page 222: ...er thermistor or outdoor temperature thermistor Defective electronic expansion valve or coil Refrigerant shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 232 Check No 12 Refer to P 236 Check No 14 Refer to P 237 A B 120 C 248 F 107 C 224 6 F R20417 Caution NG OK OK OK NG NG Discharge pipe thermistor ...

Page 223: ...ensed by the outdoor heat exchanger thermistor exceeds the limit Error Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rises above about 62 5 C 144 5 F The error is cleared when the temperature drops below about 49 5 C 121 1 F Supposed Causes The installation space not large enough Dirty outdoor heat exchanger Defective outdoor fan motor Defective stop valve Def...

Page 224: ...exchanger thermistor Replace the outdoor unit PCB main PCB Replace the electronic expansion valve or the coil Replace the outdoor unit PCB main PCB Change the installation location or direction Clean the outdoor heat exchanger Check the installation space NG OK OK NG NG OK OK OK NG NG Check No 19 Check the outdoor fan Check No 18 Check the discharge pressure Check No 12 Check the electronic expans...

Page 225: ...e before the compressor starts The system checks the DC current of the compressor right after the compressor starts Error Decision Conditions The power supply voltage and the DC voltage is obviously low or high The DC current of the compressor does not flow when the compressor starts Supposed Causes Disconnection of reactor Disconnection of compressor harness Defective outdoor unit PCB Defective c...

Page 226: ...om the outdoor unit PCB and measure the resistance value between reactor terminals with multimeter Disconnect the compressor relay harness from the outdoor unit PCB and measure the resistance value between the each 3 terminals of the compressor with multimeter Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 10 Ω or less between eac...

Page 227: ...he compressor running condition through the position detection circuit Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 5 minutes without any other error Supposed Causes Power supply voltage out of specification Disconnection of the compressor harness Defective compressor Defective outdoor unit PCB Start up failure caused by the closed...

Page 228: ...erter analyzer Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Electrical components or compressor harnesses connected as specified Replace the outdoor unit PCB main PCB Replace the compressor Reconnect the electrical components or compressor harnesses as specified Replace the outdoor unit PCB main PCB Inverter analyzer RSUK0917C Normal NO YES Check No...

Page 229: ...SiUS121827E Troubleshooting for Outdoor Unit Part 6 Service Diagnosis 223 Reference Reference Reference Check No 15 Refer to P 238 Check No 18 Refer to P 241 Check No 20 Refer to P 242 ...

Page 230: ... below 0 04 V with the power on J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature The system is shut down if all the units are judged as the J8 error Supposed Causes Disconnection of the connector for the thermistor Defective thermistor s Defective heat exchanger thermistor in the case of J3 error outdoor heat exchanger thermistor in cooling operatio...

Page 231: ...ture is lower than the heat exchanger temperature Replace the defective thermistor s Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Liquid pipe thermistor Gas pipe thermistor Cooling Outdoor heat exchanger thermistor Heating Indoor heat exchanger thermistor Replace the indoor heat exchanger thermistor Replace the outdoor unit PCB main PCB Error displayed...

Page 232: ...iation fin thermistor Disconnection of connector Defective outdoor unit PCB Troubleshooting R6000426 Check No 17 Refer to P 240 Check No 19 Refer to P 241 A B 70 C 158 F 60 C 140 F Caution YES NO YES NG NO OK NO YES Turn off the power Then turn on the power to restart the system Check the radiation fin temperature Radiation fin dirty Check No 19 Check the outdoor fan Error again or outdoor fan act...

Page 233: ...n Conditions The radiation fin temperature with the compressor on is above A The error is cleared when the temperature drops below B If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB...

Page 234: ...onnecting or disconnecting connectors or parts may be damaged R23953 NO NG OK NO YES Check the radiation fin temperature NO YES YES Above A Check No 19 Check the outdoor fan Error displayed again Has the PCB been replaced Check if silicone grease is applied properly on the radiation fin If not apply the silicone grease Replace the outdoor unit PCB main PCB Replace the outdoor fan motor Correct the...

Page 235: ...occurs while the compressor is running A rotation speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer If the error repeats the system is shut down Reset condition Continuous run for about 5 minutes without any other error Supposed Causes Poor installation condition Closed stop valve Defective powe...

Page 236: ...turn on the power to restart the system See if the same error occurs Check the power supply voltage Monitor the power supply voltage discharge and suction pressures and other factors for a long term Possible causes Momentary drop of power supply voltage Compressor overload Short circuit Not a malfunction Keep observing Check the connectors and other components Fully open the stop valve Correct the...

Page 237: ...SiUS121827E Troubleshooting for Outdoor Unit Part 6 Service Diagnosis 231 Reference Reference Reference Check No 17 Refer to P 240 Check No 18 Refer to P 241 Check No 22 Refer to P 245 ...

Page 238: ... resistance between the pins using multimeter To check the thermistor soldered on a PCB disconnect the PCB from other PCB parts and measure the resistance between the both ends of soldered thermistor R6000517 Multimeter Resistance range Thermistor ASSY Soldered thermistor Multimeter Thermistor temperature Type A C F R 25 C 77 F 20 kΩ B 3950 K 20 4 197 8 15 5 148 2 10 14 112 1 5 23 85 60 0 32 65 93...

Page 239: ...rn the power supply OFF 2 With the fan motor connector disconnected measure the resistance between each pin then make sure that the resistance is more than the value mentioned in the following table Measuring points Judgement White Blue 1 MΩ or more Orange Blue 100 kΩ or more Brown Blue 100 Ω or more Red Blue 100 kΩ or more 7 6 5 4 3 2 1 S1 or S200 R14225 Motor power supply voltage 310 340 VDC Unu...

Page 240: ...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 fan motor is operating If NG in step 1 Defective PCB Replace the PCB control PCB If NG in step 2 Defective Hall IC Replace the fan motor If OK in both steps 1 and 2 Replace the PCB control PCB 8 7 6 5 4 3 2 1 X20A R24373 Motor power supply voltage 290 330 VDC Unus...

Page 241: ...k No 11 Measure the power supply waveform between No 1 and No 2 on the terminal strip and check the waveform disturbance Check if the power supply waveform is a sine wave Fig 1 Check if there is waveform disturbance near the zero cross sections circled in Fig 2 Fig 1 Fig 2 R1736 R1444 ...

Page 242: ...faulty If the system keeps operating with a defective electronic expansion valve the following problem may occur Valve opening position Possible problem Check method Open Cooling Flowing noise of refrigerant in the unit which is not in operation Water leakage at the unit which is not in operation Operation half due to anti icing function Reset power supply and conduct cooling operation unit by uni...

Page 243: ...y valve coil Cooling Dry Defrost Not energized Heating energized Replace the outdoor unit PCB main PCB Replace the four way valve coil Replace the four way valve Four way valve coil resistance at 1000 2000 Ω S80 voltage at 208 230 VAC with compressor on Fig 1 R14674 Fig 1 Compressor ON Voltage at S80 208 230 VAC Time Refrigerant system check Is the discharge pipe thermistor disconnected from the h...

Page 244: ... in smoothing electrolytic capacitor drops to 10 VDC or below before carrying out the service work Reference If the terminals of the compressor are not FASTON terminals difficult to remove the wire on the terminals it is possible to connect wires available on site to the outdoor unit from output side of PCB Do not connect them to the compressor at the same time otherwise it may result in incorrect...

Page 245: ...k No 22 check if there is any solder cracking on the PCB 4 If any solder cracking is found replace the PCB or repair the soldered section If there is no solder cracking replace the PCB 1 When the output frequency is low the LEDs blink slowly As the output frequency increases the LEDs blink quicker The LEDs look like they are lit 2 On completion of the inverter analyzer diagnosis be sure to re crim...

Page 246: ... condition check OK Check the allowable dimensions of the air suction and discharge area Is the airflow blocked by obstacles or winds blowing in the opposite direction R19394 NG YES YES NO Is the discharged air short circuited NO NO YES Is the outdoor heat exchanger very dirty Change the installation location or direction Change the installation location or direction Clean the outdoor heat exchang...

Page 247: ... connection pipe deformed Is the stop valve open High Replace the compressor Open the stop valve Replace the pipe installed at the site Clean the dirty air filter or indoor outdoor heat exchanger Replace the compressor Discharge pressure check R21195 YES NO NO YES Outdoor fan system is functioning Check the outdoor fan system Reconnect the connector Is the outdoor fan running Fan motor lead wire c...

Page 248: ... front plate is heavy so take care 5 Remove the shield plate 2 screws 6 Measure the resistance of the pins under the refrigerant pipe cover 7 In the case it is difficult to insert the probes from the front side take out the PCB in the following procedure and measure the resistance from the rear side of the PCB Remove the 3 screws and open the refrigerant cover Disconnect the connectors Remove 13 s...

Page 249: ...SiUS121827E Check Part 6 Service Diagnosis 243 R6000583 1 2 3 4 Multimeter Front side Rear side ...

Page 250: ... the drawing of the model in question Be careful never to touch any live parts R6000525 To prevent an electrical shock use a multimeter to check that the voltage between DC and DC is 50 V or less The surface of the test points DC DC may be covered with the coating Be sure to make firm contact between the multimeter probes and the test points R6000551 Multimeter DC voltage Multimeter probe Multimet...

Page 251: ...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 Evaluate the measurement results referring to the following table R6000526 Positive terminal of digital multimeter Power module UVW Power module UVW Negative terminal of digital multimeter UVW Power module UVW Pow...

Page 252: ... Operation 248 3 Wiring Error Check Function 249 4 Trial Operation 251 4 1 RA Indoor Unit 251 4 2 SA Indoor Unit 253 5 Field Settings 256 5 1 RA Indoor Unit 256 5 2 SA Indoor Unit 262 5 3 Outdoor Unit 274 6 Silicone Grease on Power Transistor Diode Bridge 277 Part 7 Trial Operation and Field Settings ...

Page 253: ...move the valve caps from the liquid stop valve and the gas stop valve 2 Carry out forced cooling operation 3 After 1 2 minutes close the liquid stop valve with a hexagonal wrench 4 After 3 4 minutes close the gas stop valve and stop the forced cooling operation 5 Attach the valve cap once procedures are complete R7000216 Refer to page 248 for details of forced cooling operation Close Gas stop valv...

Page 254: ... monitor PCB 1 screw 4 Switch SW5 and SW6 to off 5 Turn the operation mode switch SW2 to COOL 6 Screw the cover of service monitor PCB back on 1 screw 7 Attach the shield cover 2 screws and the right side panel 6 screws 8 Turn on the power 9 Press the forced operation switch SW1 above the service monitor PCB cover The operation will start Forced cooling operation will stop automatically after abou...

Page 255: ...re is no need to use this function Procedure 1 Press the wiring error check switch SW3 on the service monitor PCB of the outdoor unit and the wiring error check function is activated 2 In about 15 25 minutes the check finishes automatically 3 When the check is over the service monitor LED indicators start blinking Self correction complete The LED indicators 1 5 blink one after another Self correct...

Page 256: ...m A and Room B respectively The LED that blinks first and second indicate piping Port A and Port B respectively Ex Suppose the LED indicators are blinking as follows In this example Port A and wiring to Room B are connected to the same room and Port B and wiring to Room A are connected to another room Incorrect wiring is then corrected automatically 1 Wrongly connected liquid and gas pipes cannot ...

Page 257: ...he highest programmable temperature 30 C 86 F Trial operation may be disabled in either operation mode depending on the room temperature After trial operation is complete set the temperature to a normal level 26 28 C 78 82 F in cooling 20 24 C 68 75 F in heating For protection the system does not start for 3 minutes after it is turned off ARC452 Series 1 Press ON OFF button to turn on the system 2...

Page 258: ...e other series 2 4 5 1 6 2 3 3 Test items Symptom Indoor and outdoor units are installed properly on solid bases Fall vibration noise No refrigerant gas leaks Incomplete cooling heating function Refrigerant gas and liquid pipes and indoor drain hose extension are thermally insulated Water leakage Draining line is properly installed Water leakage System is properly grounded Electrical leakage The s...

Page 259: ...all functions and parts such as the movement of the flaps are working properly To protect the air conditioner restart operation is disabled for 3 minutes after the system has been turned off 4 After trial operation is complete set the temperature to a normal level 26 C to 28 C 78 F to 82 F in cooling operation 20 C to 24 C 68 F to 75 F in heating operation When performing field settings or trial o...

Page 260: ...direction is actuated according to the setting For operation of airflow direction setting see the operation manual 7 After the operation of airflow direction is confirmed press Menu OK button Basic screen returns 8 Press and hold Cancel button for 4 seconds or longer in the basic screen Service settings menu is displayed 9 Select in the service settings menu and press Menu OK button Basic screen r...

Page 261: ...s Incomplete cooling heating function Refrigerant gas and liquid pipes and indoor drain hose extension are thermally insulated Water leakage Draining line is properly installed Water leakage Does the power supply voltage correspond to that shown on the name plate No operation or burn damage Only specified wires are used for all wiring and all wires are connected correctly No operation or burn dama...

Page 262: ...switch is set to the left side The heating operation will not be available when the DIP switch is set to the right side ARC466A21 ARC466A36 The remote controller is common to the heat pump model and cooling only model Replace the remote controller if you cut a jumper on the left side The heating operation will not be available when the jumper on the left side is cut R18201 DIP switch Heat pump mod...

Page 263: ...Fahrenheit or Celsius for temperature display ARC452A21 ARC452A23 Press TEMP and TEMP buttons at the same time for 5 seconds to change the unit of temperature display 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 R14477 R22009 ...

Page 264: ...red remote controller Refer to the following pages for the appropriate indoor unit and wireless remote controller FTXR CTXG CTXS FTXS Series 1 Remove the front grille 2 Remove the electrical box 3 Remove the shield plate of the electrical box 4 Cut the address setting jumper JA on the PCB FTXR CTXG Series Replace the PCB if you cut a jumper unintentionally Jumpers are necessary for electronic circ...

Page 265: ... 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 R7000179 R7000157 1 2 3 R22010 ADDRESS JA EXIST CUT 1 2 JA Connector S42 Connector S41 Connector S1 4 Remove the screw 5 Indoor ...

Page 266: ...ccur if you cut any of them Wireless Remote Controller 1 Remove the cover and take it off 2 Cut the address setting jumper Replace the remote controller if you cut a jumper unintentionally Jumpers are necessary for electronic circuit Improper operation may occur if you cut any of them ARC452 series ARC466 series Jumper ADDRESS R12065 EXIST CUT 1 2 R18416 ADDRESS EXIST 1 CUT 2 Jumper Do not cut the...

Page 267: ... setting JC Power failure recovery function Auto restart The unit does not resume operation after recovering from a power failure Timer settings are cleared Jumper on indoor unit PCB Function When connected factory setting When cut JB Fan speed setting when compressor stops for thermostat OFF effective only at cooling operation Fan speed setting Remote controller setting The fan stops JC Power fai...

Page 268: ...ot be set from SUB remote controller Procedure BRC1E73 Wired Remote Controller R7000213 a Unit No b First code No c Second code No d Mode a b c d R18831 1 Press and hold Cancel button for 4 seconds or longer Service settings menu is displayed 2 Select in the Service Settings menu and press Menu OK button Field settings screen is displayed Basic screen 1 Fan Press and hold Cancel button for 4 secon...

Page 269: ...h means it can be changed When SECOND CODE NO is displayed as there is no function 6 Press Menu OK button Setting confirmation screen is displayed 7 Select and press Menu OK button Setting details are determined and field settings screen returns 8 In the case of multiple setting changes repeat 3 to 7 9 After all setting changes are completed press Cancel button twice 10 Backlight goes out and Chec...

Page 270: ...tton for at least 4 seconds to enter the Field Set mode 2 Select the desired Mode No with MODE button 3 Press button and select the First code No 4 Press button and select the Second code No 5 Press RESERVE button to confirm the settings 6 Press TEST button to quit the Field Set mode and to return to normal display again RESERVE button Mode No Field setting mode UP button DOWN button First code No...

Page 271: ...thermistor Enabled Disabled 3 Filter cleaning sign Display No display 12 22 0 Optional accessories output selection field selection of output for adaptor for wiring Compressor Operation output Error output Outdoor air intake Presence sensor 13 23 0 High air outlet velocity for high ceiling applications 2 7 m 8 7 8 ft 2 7 3 0 m 8 7 8 9 13 16 ft 3 0 3 5 m 9 13 16 11 1 2 ft 1 Selection of airflow dir...

Page 272: ... to change filter cleaning display interval according to filter contamination Longlife filter Light Approx 2 500 hrs Heavy Approx 1 250 hrs Standard filter Approx 200 hrs Approx 100 hrs 3 Filter cleaning sign used to set filter cleaning display ON OFF Display No display 11 21 7 Air volume adjustment OFF Air volume adjustment completion Air volume adjustment start 13 23 6 External static pressure R...

Page 273: ...roller when the above message is displayed Hold Mode button for 4 seconds or longer to set When the display is changed from Main RC to Sub RC the setting is completed 2 Basic screen is displayed Sub remote controller 1 1 Basic screen 2 Basic screen 2 Set temperature Fan Set temperature Fan Main remote controller Off reminder Timer Checking the connection Please stand by Main RC Off reminder Timer ...

Page 274: ...te controller with 1 indoor unit change the MAIN SUB switch of the signal receiver PCB Signal Receiver PCB Setting MAIN SUB switch Set the MAIN SUB setting switch SS1 on the signal receiver PCB to SUB Wireless address switch Set the address setting switch SS2 on the signal receiver PCB according to the table below MAIN SUB MAIN SUB setting switch SS1 R7000181 R7000182 No 1 No 2 No 3 Address settin...

Page 275: ...tting 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 Address can be set from 1 6 but set it to 1 3 and to same address as the receiver The receiver does not work with address 4 6 4 Press RESERVE button to confirm the setting 5 Hold down TEST butto...

Page 276: ...he back of the wireless remote controller 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 Remote Controller Indoor Unit Multiple settings Remote controller display To control other air conditions and units For other than on left Standard All items displayed Commands other than ON O...

Page 277: ...ller with 1 indoor unit change the MAIN SUB switch of the transmitter board Transmitter Board MAIN SUB switch When using both a wired and a wireless remote controller for 1 indoor unit the wired controller should be set to MAIN Therefore set the MAIN SUB switch SS1 of the transmitter board to SUB Wireless address switch Set the wireless address setting switch SS2 on the transmitter board according...

Page 278: ... SETTING is indicated on the display Press FAN button and select display setting or Each time the button is pressed the display switches between and 2 Press button and button to set the address Address can be set from 1 6 but set it to 1 3 and to same address as the transmitter board The transmitter board does not work with address 4 6 3 Press RESERVE button to confirm the setting 4 Hold down TEST...

Page 279: ...both air outlet of the decoration panel and onto back of the wireless remote controller 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 Remote Controller Indoor Unit Multiple settings Remote controller display To control other air conditions and units For other than on left Standar...

Page 280: ...xpansion valves are controlled to provide more capacity to the prioritized room and the capacities for the other indoor units will be slightly reduced OUTDOOR UNIT QUIET operation priority When the OUTDOOR UNIT QUIET operation is selected in the prioritized room the outdoor unit runs quietly Without priority room setting OUTDOOR UNIT QUIET operation starts only when the function is set for all the...

Page 281: ...t 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 R7000163 Forced operation is also possible in cooling heating mode Top panel Right side panel Shield plate Front panel Hooks HEAT mode H COOL mode C S15 connecto...

Page 282: ... use NIGHT QUIET mode NIGHT QUIET mode function reduces operating noise of the outdoor unit at nighttime This function is useful if the customer is worried about the effects of the operating noise on the neighbors However if NIGHT QUIET mode is running cooling capacity is reduced Procedure Turn on the SW6 1 on the service monitor PCB of the outdoor unit Service monitor PCB HEAT COOL 4 3 2 1 2 1 E ...

Page 283: ...d silicone grease on the refrigerant pipe completely 2 Apply the silicone grease on the heat sink evenly See the illustrations below for examples of application 3 Tighten the screws of cover 4 Make sure that the heat radiation parts are firmly contacted to refrigerant pipe Smoke emission may be caused by bad heat radiation when the silicone grease is not appropriately applied OK Evenly applied R70...

Page 284: ...SiUS121827E 278 Part 8 Appendix 1 Piping Diagrams 279 1 1 Indoor Unit 279 1 2 Outdoor Unit 282 2 Wiring Diagrams 283 2 1 Indoor Unit 283 3 Outdoor Unit 290 4 Operation Limit 292 Part 8 Appendix ...

Page 285: ...008A Indoor unit 1 4 CuT 3 8 CuT Heat exchanger thermistor Heat exchanger Cross flow fan Fan motor Field piping 1 2 CuT Field piping 1 4 CuT Refrigerant flow Cooling Heating 4D101010A INDOOR UNIT 1 4 CuT HEAT EXCHANGER CROSS FLOW FAN FIELD PIPING 1 4 CuT M FAN MOTOR FIELD PIPING 3 8 CuT 3 8 CuT REFRIGERANT FLOW COOLING HEATING 4D074606 THERMISTOR ON HEAT EXCH INDOOR UNIT 5 16 CuT DISTRIBUTOR HEAT ...

Page 286: ...T EXCHANGER FIELD PIPING 1 4CuT SIROCCO FAN M FAN MOTOR 3 8CuT FIELD PIPING 3 8CuT REFRIGERANT FLOW COOLING HEATING 4D074621A THERMISTOR ONHEATEXCH INDOOR UNIT 1 4 6 4mm CuT HEAT EXCHANGER FIELD PIPING 1 4 6 4mm CuT SIROCCO FAN M FAN MOTOR FIELD PIPING 1 2 12 7mm CuT 1 2 12 7mm CuT REFRIGERANT FLOW COOLING HEATING 4D075271 THERMISTOR ON HEAT EXCH INDOOR UNIT 3 8CuT HEAT EXCHANGER SIROCCO FAN M FAN...

Page 287: ... REFRIGERANT FLOW COOLING HEATING 4D091794 INDOOR UNIT MUFFLER ASSY HEAT EXCHANGER 1 4 CuT 9 32 CuT 1 4 CuT 1 4 CuT 1 4 CuT 1 4 CuT M 1 4 CuT FAN MOTOR TURBO FAN 1 4 CuT 3 8 CuT REFRIGERANT FLOW COOLING HEATING FIELD PIPING 1 4 CuT FIELD PIPING 1 2 CuT THERMISTOR ONHEATEXCH 4D091795A 4D112974 4D106033 HEAT EXCHANGER FAN REFRIGERANT FLOW COOLING HEATING FFQ09Q2VJU 1 4 6 4 3 8 9 5 1 2 12 7 FFQ12Q2VJ...

Page 288: ...Piping Diagrams SiUS121827E 282 Part 8 Appendix 1 2 Outdoor Unit 5MXS48TVJU 4MXL36TVJU 3D117817 3D118311 ...

Page 289: ...LK BLK BLK BLK BLK BLK BLK BLK BLK BLK BLK BLK WHT RED BLU BRN ORG WHT RED GRN YLW GRN YLW RED ORG YLW BLU OUTDOOR INDOOR Field wiring NOTE When the main power is turned off and then back on again operation will resume automatically Wiring diagram FG F1U F2U H1P H2P R1T R2T S25 S200 S1W S1C X1M BZ M1F M1S M3S M1 A1P A3P TRC WRC IES SR H1 H3 MR10 V1 C101 C102 Frame ground Fuse Pilot lamp Thermistor...

Page 290: ...13 6 11 3 1 4 15 9 1 14 5 8 7 10 BLK BLK BLK BLK BLK PNK PNK PNK BLU BLU BLU ORG ORG ORG RED RED RED YLW YLW YLW S48 PCB2 t 1 3 INDOOR R2T MSW MSW MSW M3S M2S M1S LED1 H1P LED2 H2P LED3 H3P RTH1 R1T INTELLIGENT EYE SENSOR WIRELESS REMOTE CONTROLLER SIGNAL RECEIVER TRANSMISSION CIRCUIT FU1 F1U MS 3 GRN YLW CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF...

Page 291: ...S36 1 WHT 3 S41 S47 S32 BLK 4 M1F 5 1 11 1 16 2 7 13 1 15 3 12 2 9 4 3 14 10 8 6 BLK BLK BLK BLK BLK PNK PNK PNK BLU BLU BLU ORG ORG ORG RED RED RED YLW YLW YLW S48 PCB2 t 1 3 INDOOR R2T MSW MSW MSW M3S M2S M1S WIRING DIAGRAM INTELLIGENT EYE SENSOR WIRELESS REMOTE CONTROLLER SIGNAL RECEIVER TRANSMISSION CIRCUIT MS 3 NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED ...

Page 292: ...ED BLK S7 10 10 1 GRY YLW RTH1 S32 2 1 2 1 3 C1 WHT BRN BRN t M t 1 Q1M PPL R1T INDOOR 130 C 266 F BLU R2T M1F WIRELESS REMOTE CONTROLLER TRANSMISSION CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN H1P H3P M1F A1P A2P Q1M R1T R2T S1 S32 RTH1 S1W V1TR X1M PILOT LAMP FAN MOTOR PRINTED CIRCUIT BOARD THERMAL PROTECTOR FOR MOTOR THER...

Page 293: ...1P ORG WHT 1 S42 HA S21 t RED 1 ORG S49 S48 M YLW M1S PNK R1T BLU 6 PCB1 S41 RED 1 t ORG M YLW S32 M2S PNK BLU R2T 5 INDOOR WIRELESS REMOTE CONTROLLER SIGNAL RECEIVER TRANSMISSION CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN F1U F2U H1P H2P M1F M1S M2S PCB1 PCB4 R1T R2T S1 S49 S1W S2W 4 S4W X1M E3 E4 PROTECTIVE GROUND FUSE PIL...

Page 294: ...Wiring Diagrams SiUS121827E 288 Part 8 Appendix Note FDMQ09 12 15 18 24RVJU A1P Control PCB A2P Indoor fan PCB Refer to page 47 for Printed Circuit Board Connector Wiring Diagram 3D112629A ...

Page 295: ...ON PCB CAPACITOR M1F MAGNETIC RELAY FAN MOTOR DRAIN PUMP MOTOR SWING MOTOR SWITCHING POWER SUPPLY FLOAT SWITCH NOISE FILTER FERRITE CORE FERRITE CORE DIODE BRIDGE RECEIVER TRANSMITTER TERMINAL BLOCK TERMINAL BLOCK THERMISTOR AIR THERMISTOR COIL A1P H2P H1P C105 DS1 H3P H4P SS1 SS2 A4P A5P R4T X24A X33A X35A X81A F1U HAP K2R M1F M1P R1T S1L V1R X1M X2M Z1F Z1C Z2C PS RC TC BS1 M1S M2S M3S M4S R2T R...

Page 296: ...Outdoor Unit SiUS121827E 290 Part 8 Appendix Note s 3 Outdoor Unit 5MXS48TVJU PCB1 Main PCB PCB2 Service monitor PCB Refer to page 54 for Printed Circuit Board Connector Wiring Diagram 3D118022 ...

Page 297: ...SiUS121827E Outdoor Unit Part 8 Appendix 291 Note s 4MXL36TVJU PCB1 Main PCB PCB2 Service monitor PCB Refer to page 54 for Printed Circuit Board Connector Wiring Diagram 3D118060 ...

Page 298: ...Operation Limit SiUS121827E 292 Part 8 Appendix 4 Operation Limit 5MXS48TVJU 4MXL36TVJU 3D048149D 3D101428 ...

Page 299: ...ocal legislation z z Ask a qualified installer or contractor to install this product Do not try to install the product yourself Improper installation can result in water or refrigerant leakage electrical shock fire or explosion z z Use only those parts and accessories supplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorized ...

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