Daikin Super Multi NX B series, Service Manual

Page 1: ...B Series Applied Models z z z zInverter Multi Cooling Only z z z zInverter Multi Heat Pump Si12 308 Service Manual ...

Page 2: ...LK35AVMA FLK50AVMA FLK60AVMA Outdoor Unit 2MKD58BVM 3MKD75BVMA 3MKD75BVMT 3MKS50BVMB 3MKD58BVM 4MKD90BVMA 4MKD90BVMT 4MKS58BVMB 3MKD75BVM 4MKS75BVMB 4MKD75BVM 4MKS90BVMB 4MKD90BVM zHeat Pump Indoor Unit FTXE25BVMC FTXE25BVMA FTXE25BVMT FTXS25BVMB FLXS25BVMB FTXE35BVMC FTXE35BVMA FTXE35BVMT FTXS35BVMB FLXS35BVMB FTXD50BVMC FTXD50BVMA FTXD50BVMT FTXS50BVMB FLXS50BVMB FTXD60BVMC FTXD60BVMA FTXD60BVMT...

Page 3: ... Connected Type 69 1 5 Floor Standing Type 70 1 6 Outdoor Units 72 Part 4 Function and Control 73 1 Main Functions 74 1 1 Frequency Principle 74 1 2 Power Airflow Dual Flaps Wide Angle Louvers and Auto Swing 76 1 3 Fan Speed Control for Indoor Units 77 1 4 Programme Dry Function 78 1 5 Automatic Operation 79 1 6 Night Set Mode 80 1 7 Intelligent Eye 81 1 8 Home Leave Operation 83 1 9 Inverter Powe...

Page 4: ...1 TIMER Operation 147 2 12 Note for Multi System 149 2 13 Care and Cleaning 151 2 14 Trouble Shooting 161 Part 6 Service Diagnosis 165 1 Caution for Diagnosis 166 1 1 Troubleshooting with the Operation Lamp 166 2 Problem Symptoms and Measures 168 3 Service Check Function 169 4 Code Indication on the Remote Controller 170 4 1 Error Codes and Description of Fault 170 5 Troubleshooting 171 5 1 Indoor...

Page 5: ... 218 1 2 Removal of Propeller Fans 221 1 3 Removal of Electrical Box 222 1 4 Removal of PCB 229 1 5 Removal of Fan Motor 232 1 6 Removal of Electronic Expansion Valve and Thermistor 234 1 7 Removal of Sound Insulation and Reactor 235 1 8 Removal of Shunt 237 1 9 Removal of Solenoid Valve and Four Way Valve 238 1 10 Removal of Compressor 240 2 Outdoor Unit 52 58 68 75 Class 242 2 1 Removal of Outer...

Page 6: ... 308 Table of Contents v Part 9 Appendix 261 1 Piping Diagrams 262 1 1 Indoor Units 262 1 2 Outdoor Units 268 2 Wiring Diagrams 275 2 1 Indoor Units 275 2 2 Outdoor Units 280 Index i Drawings Flow Charts v ...

Page 7: ...Si12 308 vi Table of Contents ...

Page 8: ...plug socket before disassembling the equipment for a repair Working on the equipment that is connected to a power supply can cause an electrical shook If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas discharges during the repair work do not touch the dischargin...

Page 9: ...se the welder in a well ventilated place Using the welder in an enclosed room can cause oxygen deficiency Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools can cause an electrical shock excessive heat generation or fire When relocating the e...

Page 10: ...as leaks be sure to locate the leak and repair it before charging the refrigerant After charging refrigerant make sure that there is no refrigerant leak If the leak cannot be located and the repair work must be stopped be sure to perform pump down and close the service valve to prevent the refrigerant gas from leaking into the room The refrigerant gas itself is harmless but it can generate toxic g...

Page 11: ...and repair it if the equipment is not properly grounded Improper grounding can cause an electrical shock Be sure to measure the insulation resistance after the repair and make sure that the resistance is 1 Mohm or higher Faulty insulation can cause an electrical shock Be sure to check the drainage of the indoor unit after the repair Faulty drainage can cause the water to enter the room and wet the...

Page 12: ...Si12 308 List of Functions 1 Part 1 Part 1 Part 1 Part 1 List of Functions List of Functions List of Functions List of Functions 1 List of Functions 2 1 1 Cooling Only Models 2 1 2 Heat Pump Models 10 ...

Page 13: ...y Durability Auto Restart after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic ...

Page 14: ...tart after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High Ceiling Applicat...

Page 15: ...estart after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High Ceiling Applic...

Page 16: ...art after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High Ceiling Applicati...

Page 17: ...Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High Ceiling Application Outdoor...

Page 18: ...ter Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High Ceiling Application Out...

Page 19: ...Restart after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High Ceiling Appli...

Page 20: ...rability Auto Restart after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High...

Page 21: ...ability Auto Restart after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High ...

Page 22: ... Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High Ceiling Application Outdoor Unit...

Page 23: ...estart after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High Ceiling Applic...

Page 24: ...er Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 1 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High Ceiling Application Outdoor ...

Page 25: ...Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High Ceiling Application Outdoor...

Page 26: ... Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High Ceiling Application Outdoor Unit...

Page 27: ...Restart after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High Ceiling Appli...

Page 28: ...estart after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 1 1 3 D Airflow Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Silent Operation Flexible Voltage Correspondence Night Quiet Mode Automatic High Ceiling Ap...

Page 29: ...List of Functions Si12 308 18 List of Functions ...

Page 30: ...t 2 Part 2 Part 2 Part 2 Specifications Specifications Specifications Specifications 1 Specifications 20 1 1 Indoor Units Cooling Only 20 1 2 Outdoor Units Cooling Only 34 1 3 Indoor Units Heat Pump 41 1 4 Outdoor Units Heat Pump 55 ...

Page 31: ...Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ12 7 Drain mm φ18 0 φ18 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FTKD50BVM FTKD60BVM Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color White White Air Flow Rates m min cfm H 16 8 593 17 5 618 M 14 0 494 14 6 515 L 11 8 417 12 2 431 SL 10 4 367 10 8 318 Fan ...

Page 32: ... and Downward Air Filter Removal Washable Mildew Proof Running Current Rated A 0 23 0 22 0 21 0 23 0 22 Power Consumption Rated W 50 50 50 50 50 Power Factor 98 8 98 8 99 2 98 8 98 8 Temperature Control Microcomputer Control Dimensions H W D mm 290 1 050 238 Packaged Dimension mm 1 147 366 337 Weight kg 12 Gross Weight kg 17 Operation Sound H M L SL dBA 46 42 37 34 Heat Insulation Both Liquid and ...

Page 33: ...es Both Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ12 7 Drain mm φ18 0 φ18 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FTKD50BVMA FTKD60BVMA Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color White White Air Flow Rates m min cfm H 16 8 593 17 5 618 M 14 0 494 14 6 515 L 11 8 417 12 2 431 SL 10 4 367 10 8 381 Fan Type Cross Flow Fan C...

Page 34: ... and Downward Air Filter Removal Washable Mildew Proof Running Current Rated A 0 23 0 22 0 21 0 23 0 22 Power Consumption Rated W 50 50 50 50 50 Power Factor 98 8 98 8 99 2 98 8 98 8 Temperature Control Microcomputer Control Dimensions H W D mm 290 1 050 238 Packaged Dimension mm 1 147 366 337 Weight kg 12 Gross Weight kg 17 Operation Sound H M L SL dBA 46 42 37 34 Heat Insulation Both Liquid and ...

Page 35: ...uid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ12 7 Drain mm φ18 0 φ18 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FTKD50BVMT FTKD60BVMT Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color White White Air Flow Rates m min cfm H 15 4 544 16 2 572 M 12 9 455 13 6 480 L 10 8 381 11 4 402 SL 9 6 339 10 2 360 Fan Type Cross Flow Fan Cross Flow Fa...

Page 36: ...Left Horizontal and Downward Air Filter Removal Washable Mildew Proof Running Current Rated A 0 23 Power Consumption Rated W 50 Power Factor 98 8 Temperature Control Microcomputer Control Dimensions H W D mm 290 1 050 238 Packaged Dimension mm 1 147 366 337 Weight kg 12 Gross Weight kg 17 Operation Sound H M L SL dBA 46 42 37 34 Heat Insulation Both Liquid and Gas Pipes Piping Connection Liquid mm...

Page 37: ...iquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ 9 5 Drain mm φ18 0 φ18 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FTKS50BVMB FTKS60BVMB Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color White White Air Flow Rates m min cfm H 11 4 402 16 2 572 M 9 7 342 13 6 480 L 8 0 282 11 4 402 SL 7 1 251 10 2 360 Fan Type Cross Flow Fan Cross Flow Fa...

Page 38: ...Left Horizontal and Downward Air Filter Removal Washable Mildew Proof Running Current Rated A 0 20 Power Consumption Rated W 45 Power Factor 96 4 Temperature Control Microcomputer Control Dimensions H W D mm 290 1 050 238 Packaged Dimension mm 1 147 366 337 Weight kg 12 Gross Weight kg 17 Operation Sound H M L SL dBA 46 42 37 34 Heat Insulation Both Liquid and Gas Pipes Piping Connection Liquid mm...

Page 39: ... Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ12 7 Drain mm φ 27 2 3 4B φ 27 2 3 4B Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model CDK50AVM CDK60AVM Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color Air Flow Rates m min cfm H 13 0 459 14 5 512 M 12 0 424 13 0 459 L 11 0 388 11 5 406 SL 10 1 357 10 2 360 Fan Type Sirocco Fan Sirocco Fan Mot...

Page 40: ... Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ12 7 Drain mm φ 27 2 3 4B φ 27 2 3 4B Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model CDK50AVMA CDK60AVMA Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color Air Flow Rates m min cfm H 13 0 459 14 5 512 M 12 0 424 13 0 459 L 11 0 388 11 5 406 SL 10 1 357 10 2 360 Fan Type Sirocco Fan Sirocco Fan M...

Page 41: ...nd Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ 9 5 Drain mm φ 27 2 3 4B φ 27 2 3 4B Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model CDKS50BVMB CDKS60BVMB Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color Air Flow Rates m min cfm H 13 0 459 14 5 512 M 12 0 424 13 0 459 L 11 0 388 11 5 406 SL 10 1 357 10 2 360 Fan Type Sirocco Fan Sirocco Fan Motor Ou...

Page 42: ...and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ12 7 Drain mm φ18 0 φ18 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FLK50AVMA FLK60AVMA Rated Capacity 5 0W Class 5 7kW Class Front Panel Color Almond White Almond White Air Flow Rates m min cfm H 11 4 402 12 0 424 M 10 0 353 10 6 374 L 8 5 300 9 3 328 SL 7 5 265 8 3 293 Fan Typ...

Page 43: ...ipes Both Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ 9 5 Drain mm φ18 0 φ18 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FLKS50BVMB FLKS60BVMB Rated Capacity 5 0W Class 5 7kW Class Front Panel Color Almond White Almond White Air Flow Rates m min cfm H 11 4 402 12 0 424 M 10 0 353 10 7 378 L 8 5 300 9 3 328 SL 7 5 265 8 3 293 Fan Type Siroc...

Page 44: ... 770 294 714 Weight kg 13 13 Gross Weight kg 19 19 Operation Sound H M L SL dBA 38 32 26 23 39 33 27 24 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ 9 5 Drain mm φ 20 0 φ 20 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FVKS50BVMB Rated Capacity 5 0kW Class Front Panel Color Almond White Air Flow...

Page 45: ... 27 H 44 L 27 Starting Current A 6 9 6 5 Dimensions H W D mm 735 936 300 735 936 300 Packaged Dimension mm 960 357 784 960 357 784 Weight kg 55 55 Gross Weight kg 59 59 Operation Sound dBA 46 46 Piping Connection Liquid mm φ 6 4 2 φ 6 4 3 Gas mm φ12 7 2 φ12 7 3 Drain mm φ16 0 φ16 0 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 for ...

Page 46: ... A 9 4 9 2 Dimensions H W D mm 735 936 300 735 936 300 Packaged Dimension mm 960 357 784 960 357 784 Weight kg 58 58 Gross Weight kg 62 62 Operation Sound dBA 48 48 Piping Connection Liquid mm φ 6 4 1 φ 9 5 2 φ 6 4 2 φ 9 5 2 Gas mm φ12 7 1 φ15 9 2 φ12 7 2 φ15 9 2 Drain mm φ16 0 φ16 0 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 fo...

Page 47: ... H 0 44 L 0 34 Power Consumption W H 60 L 41 Starting Current A 12 1 Dimensions H W D mm 908 900 320 Packaged Dimension mm 926 394 942 Weight kg 66 Gross Weight kg 77 Operation Sound dBA 48 Piping Connection Liquid mm φ 6 4 2 φ 9 5 2 Gas mm φ12 7 1 φ15 9 3 Drain mm φ25 0 Heat Insulation Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 for Interunit Wiring Max Piping Length m ...

Page 48: ... 9 4 12 1 Dimensions H W D mm 735 936 300 908 900 320 Packaged Dimension mm 960 357 784 926 394 942 Weight kg 58 66 Gross Weight kg 62 77 Operation Sound dBA 48 48 Piping Connection Liquid mm φ 6 4 1 φ 9 5 2 φ 6 4 2 φ 9 5 2 Gas mm φ12 7 1 φ15 9 2 φ12 7 1 φ1 5 9 3 Drain mm φ16 0 φ 25 0 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 f...

Page 49: ...aged Dimension mm 960 357 784 926 394 942 Weight kg 58 66 Gross Weight kg 62 77 Operation Sound dBA 48 48 Piping Connection Liquid mm φ 6 4 1 φ 9 5 2 φ 6 4 2 φ 9 5 2 Gas mm φ12 7 1 φ15 9 2 φ12 7 1 φ15 9 3 Drain mm φ16 0 φ 25 0 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 for Interunit Wiring 3 for Power Supply 4 for Interunit Wiri...

Page 50: ...7 7 7 Dimensions H W D mm 735 936 300 735 936 300 Packaged Dimension mm 960 357 784 960 357 784 Weight kg 55 55 Gross Weight kg 59 59 Operation Sound dBA 46 46 Piping Connection Liquid mm φ 6 4 3 φ 6 4 4 Gas mm φ 9 5 3 φ 9 5 2 φ12 7 2 Drain mm φ16 0 φ16 0 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 for Interunit Wiring 3 for Powe...

Page 51: ...1 Dimensions H W D mm 735 936 300 908 900 320 Packaged Dimension mm 960 357 784 926 394 942 Weight kg 58 66 Gross Weight kg 62 77 Operation Sound dBA 48 48 Piping Connection Liquid mm φ 6 4 4 φ 6 4 4 Gas mm φ 9 5 2 φ12 7 1 φ15 9 1 φ 9 5 1 φ12 7 1 φ15 9 2 Drain mm φ16 0 φ 25 0 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 for Interu...

Page 52: ...Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ12 7 Drain mm φ18 0 φ18 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FTXD50BVMC FTXD60BVMC Cooling Heating Cooling Heating Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color White White Air Flow Rates m min cfm H 12 3 434 12 5 441 17 5 617 18 7 660 M 10 4 367 11 0 388 14 6 517 16 1...

Page 53: ...ol Right Left Horizontal and Downward Air Filter Removable Washable Mildew Proof Running Current Rated A 0 23 0 23 Power Consumption Rated W 50 50 Power Factor 98 8 98 8 Temperature Control Microcomputer Control Dimensions H W D mm 290 1 050 238 Packaged Dimensions W D H mm 1 147 366 337 Weight kg 12 Gross Weight kg 17 Operation Sound H M L SL dBA 46 42 37 34 46 42 37 34 Heat Insulation Both Liqui...

Page 54: ...s Both Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ12 7 Drain mm φ18 0 φ18 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FTXD50BVMA FTXD60BVMA Cooling Heating Cooling Heating Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color White White Air Flow Rates m min cfm H 16 8 593 17 5 618 17 5 618 18 7 660 M 14 0 494 14 9 526 14 6 515 16 1 568...

Page 55: ...d Air Filter Removal Washable Mildew Proof Running Current Rated A 0 23 0 22 0 21 0 23 0 22 0 23 0 22 0 21 0 23 0 22 Power Consumption Rated W 50 50 50 50 50 50 50 50 50 50 Power Factor 98 8 98 8 99 2 98 8 98 8 98 8 98 8 99 2 98 8 98 8 Temperature Control Microcomputer Control Dimensions H W D mm 290 1 050 238 Packaged Dimension mm 1 147 366 337 Weight kg 12 Gross Weight kg 17 Operation Sound H M ...

Page 56: ...and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ12 7 Drain mm φ18 0 φ18 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FTXD50BVMT FTXD60BVMT Cooling Heating Cooling Heating Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color White White Air Flow Rates m min cfm H 15 4 544 16 1 568 16 2 572 17 1 604 M 12 9 455 13 7 484 13 6 480 14 8 522 L 10 8 381 11...

Page 57: ...Control Right Left Horizontal and Downward Air Filter Removal Washable Mildew Proof Running Current Rated A 0 23 0 23 Power Consumption Rated W 50 50 Power Factor 98 8 98 8 Temperature Control Microcomputer Control Dimensions H W D mm 290 1 050 238 Packaged Dimension mm 1 147 366 337 Weight kg 12 Gross Weight kg 17 Operation Sound H M L SL dBA 46 42 37 34 46 42 37 34 Heat Insulation Both Liquid an...

Page 58: ...id and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ 9 5 Drain mm φ18 0 φ18 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FTXS50BVMB FTXS60BVMB Cooling Heating Cooling Heating Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color White White Air Flow Rates m min cfm H 11 4 402 12 6 445 16 2 572 17 4 614 M 9 7 342 10 8 381 13 6 480 15 1 533 L 8 0 282 8...

Page 59: ...Control Right Left Horizontal and Downward Air Filter Removal Washable Mildew Proof Running Current Rated A 0 20 0 22 Power Consumption Rated W 45 50 Power Factor 96 4 97 6 Temperature Control Microcomputer Control Dimensions H W D mm 290 1 050 238 Packaged Dimension mm 1 147 366 337 Weight kg 12 Gross Weight kg 17 Operation Sound H M L SL dBA 46 42 37 34 46 42 37 34 Heat Insulation Both Liquid an...

Page 60: ...Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ12 7 Drain mm φ 27 2 φ 27 2 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model CDX50AVMC CDX60AVMC Cooling Heating Cooling Heating Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color Air Flow Rates m min cfm H 13 0 459 13 0 459 14 5 512 14 5 512 M 12 0 424 12 0 424 13 0 459 13 0 459 L 11 0 388 11 0 38...

Page 61: ...pes Both Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ12 7 Drain mm φ 27 2 φ 27 2 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model CDX50AVMA CDX60AVMA Cooling Heating Cooling Heating Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color Air Flow Rates m min cfm H 13 0 459 13 0 459 14 5 512 14 5 512 M 12 0 424 12 0 424 13 0 459 13 0 459 L 11 0 38...

Page 62: ... Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ 9 5 Drain mm φ 27 2 φ 27 2 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model CDXS50BVMB CDXS60BVMB Cooling Heating Cooling Heating Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color Air Flow Rates m min cfm H 13 0 459 13 0 459 14 5 512 14 5 512 M 12 0 424 12 0 424 13 0 459 13 0 459 L 11 0 388 11 0...

Page 63: ...d Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ12 7 Drain mm φ18 0 φ18 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FLX50AVMA FLX60AVMA Cooling Heating Cooling Heating Rated Capacity 5 0kW Class 5 7kW Class Front Panel Color Almond White Almond White Air Flow Rates m min cfm H 11 4 402 12 1 427 12 0 424 12 8 452 M 10 0 353 9 8 ...

Page 64: ...es Both Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ 9 5 Drain mm φ18 0 φ18 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FLXS50BVMB FLXS60BVMB Cooling Heating Cooling Heating Rated Capacity 5 0kW Class 5 7kW Class Front Panel Color Almond White Almond White Air Flow Rates m min cfm H 11 4 402 12 1 427 12 0 424 12 8 452 M 10 0 353 9 8 346 10 ...

Page 65: ... 770 294 714 770 294 714 Weight kg 13 13 Gross Weight kg 19 19 Operation Sound H M L SL dBA 38 32 26 23 38 32 26 23 39 33 27 24 39 34 29 26 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ 9 5 Drain mm φ 20 0 φ 20 0 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FVXS50BVMB Cooling Heating Rated Capacity...

Page 66: ...ing Current A 10 9 11 1 Dimensions H W D mm 735 936 300 908 900 320 Packaged Dimension mm 990 400 784 926 394 942 Weight kg 59 73 Gross Weight kg 63 80 Operation Sound dBA 48 49 48 49 Piping Connection Liquid mm φ 6 4 3 φ 6 4 3 φ 9 5 1 Gas mm φ12 7 2 φ15 9 1 φ 9 5 1 φ12 7 1 φ15 9 2 Drain mm φ16 0 φ 25 0 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes No of Wiring Connection 3 f...

Page 67: ...urrent A 10 1 10 2 Dimensions H W D mm 735 936 300 908 900 320 Packaged Dimension mm 960 357 784 926 394 942 Weight kg 59 73 Gross Weight kg 63 80 Operation Sound dBA 48 49 48 49 Piping Connection Liquid mm φ 6 4 3 φ 6 4 3 φ 9 5 1 Gas mm φ12 7 2 φ15 9 1 φ 9 5 1 φ12 7 1 φ15 9 2 Drain mm φ16 0 φ 25 0 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes No of Wiring Connection 3 for Po...

Page 68: ...0 Operation Sound dBA 48 49 48 49 Piping Connection Liquid mm φ 6 4 3 φ 6 4 3 φ 9 5 1 Gas mm φ12 7 2 φ15 9 1 φ 9 5 1 φ12 7 1 φ15 9 2 Drain mm φ16 0 φ 25 0 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 for Interunit Wiring 3 for Power Supply 4 for Interunit Wiring Max Interunit Piping Length m 45 for Total of Each Room 70 for Total ...

Page 69: ... A 6 9 8 5 Dimensions H W D mm 735 936 300 735 936 300 Packaged Dimension mm 960 357 784 960 357 784 Weight kg 55 59 Gross Weight kg 59 63 Operation Sound dBA 46 47 48 49 Piping Connection Liquid mm φ 6 4 3 φ 6 4 4 Gas mm φ 9 5 2 φ12 7 1 φ 9 5 2 φ12 7 2 Drain mm φ18 0 φ18 0 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 for Interuni...

Page 70: ...umption W H 60 L 41 Starting Current A 8 7 Dimensions H W D mm 908 900 320 Packaged Dimension mm 926 394 942 Weight kg 73 Gross Weight kg 80 Operation Sound dBA 48 49 Piping Connection Liquid mm φ 6 4 4 Gas mm φ 9 5 2 φ12 7 1 φ15 9 1 Drain mm φ 25 0 Heat Insulation Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 for Interunit Wiring Max Interunit Piping Length m 70 for Total...

Page 71: ...Specifications Si12 308 60 Specifications ...

Page 72: ...d Circuit Board Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram 1 Printed Circuit Board Connector Wiring Diagram 62 1 1 Wall Mounted Type 25 35 Class 62 1 2 Wall Mounted Type 50 60 71 Class 65 1 3 Floor Ceiling Suspended Dual Type 67 1 4 Duct Connected Type 69 1 5 Floor Standing Type 70 1 6 Outdoor Units 72 ...

Page 73: ...or for fan motor 4 S21 Connector for centralized control to 5 rooms 5 S26 Connector for signal receiver PCB 6 S27 Connector for control PCB 7 S32 Connector for heat exchanger thermistor 8 S35 Connector for Intelligent Eye Sensor PCB 1 V1 Varistor 2 JA Address setting jumper JB Fan speed setting when compressor is OFF on thermostat JC Power failure recovery function Refer to page 259 for more detai...

Page 74: ...ctor Wiring Diagram Printed Circuit Board Connector Wiring Diagram 63 PCB JP21 JB JA JC 5V GND 12V R2413 SW7 PCB 1 Control S1 5V Check S27 S7 S6 S26 S32 JA S35 S21 V1 JB JC GND 12V Check PCB 2 Signal reciever PCB 3 Intelligent eye sensor ...

Page 75: ...Printed Circuit Board Connector Wiring Diagram Si12 308 64 Printed Circuit Board Connector Wiring Diagram PCB Detail ...

Page 76: ...ctor for buzzer PCB 6 S27 S29 S36 Connector for control PCB 7 S28 Connector for signal receiver PCB 8 S32 Connector for heat exchanger thermistor 9 S35 Connector for Intelligent Eye sensor PCB 10 S38 Connector for display PCB 1 V1 Varistor 2 JA Address setting jumper JB Fan speed setting when compressor is OFF on thermostat JC Power failure recovery function Refer to page 259 for detail 3 SW1 Oper...

Page 77: ...d Connector Wiring Diagram PCB Detail PCB 1 Control PCB indoor unit PCB 2 Signal Receiver PCB PCB 3 Buzzer PCB PCB 4 Display PCB PCB 5 Intelligent Eye sensor PCB S1 V1 FU1 S6 S8 S26 R2860 S28 S32 JC JB JA S21 S35 SW1 S29 R2861 R2862 RTH1 S38 S27 LED1 LED2 LED3 S37 R2863 S36 R2864 ...

Page 78: ...ntrol 5 S24 Connector for Display PCB 6 S25 S27 S36 Connector for Control PCB 7 S26 Connector for Signal Receiver PCB 8 S31 Connector for Room Temp Thermistor 9 S32 Connector for Heat Exchanger Thermistor 10 S37 Connector for Power Supply PCB 1 V1 Varistor 2 JA Address setting jumper JB Fan speed setting when compressor is OFF on thermostat JC Power failure recovery function Refer to page 259 for ...

Page 79: ...Printed Circuit Board Connector Wiring Diagram Si12 308 68 Printed Circuit Board Connector Wiring Diagram Power Supply PCB PCB 2 Display PCB PCB 3 Signal Receiver PCB PCB 4 ...

Page 80: ...S1 on PCB 2 Connector for control PCB 3 S7 Connector for fan motor 4 S21 Connector for centralized control to 5 rooms 5 S26 Connector for display PCB 6 S32 Connector for room temp Heat exchanger thermistor 1 V1 Varistor 2 JA Address setting jumper JB Fan speed setting when compressor is OFF on thermostat JC Power failure recovery function Refer to page 259 for more detail 3 SW1 OPERATION SWITCH 4 ...

Page 81: ... and Lower Air outlet Motor 2 S21 Connector for HA 3 S23 Connector for signal receiver 4 S31 S32 Connector for Room Temp Heat Exchanger Thermistor 5 S201 S203 S7 S24 S26 Connector for Power Supply PCB 1 6 S202 S204 S8 Connector for Control PCB 2 7 S25 Connector for Display PCB 3 8 S301 S302 Connector for fan motors 1 V1 Varistor 2 FU FUSE 3 LED11 LED for operation 4 LED12 LED for timer 5 LED14 LED...

Page 82: ...Si12 308 Printed Circuit Board Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 71 Control PCB PCB 2 Display PCB PCB 3 Signal Receiver PCB PCB 4 ...

Page 83: ...22 Connector for electronic expansion valve coil C port 4 S23 Connector for electronic expansion valve coil D port 5 S31 Connector for CN14 6 S32 Connector for CN11 7 S33 Connector for S34 8 S40 Connector for overload relay 9 S71 Connector for S72 10 S80 Connector for four way valve coil 11 S90 Connector for thermistor outdoor air heat exchanger and discharge pipe 12 S92 Connector for gas pipe the...

Page 84: ...ul Operation 84 1 10 Other Functions 85 2 Function of Main Structural Parts 87 2 1 Main Structural Parts 87 2 2 Function of Thermistor 88 3 Control Specification 92 3 1 Mode Hierarchy 92 3 2 Frequency Control 93 3 3 Controls at Mode Changing Start up 95 3 4 Discharge Pipe Control 96 3 5 Input Current Control 96 3 6 Freeze up Protection Control 97 3 7 Heating Peak cut Control 97 3 8 Fan Control 98 ...

Page 85: ...e explains the conversion principle Drawing of Inverter The following drawing shows a schematic view of the inverter principle Phase Description 1 The supplied AC power source is converted into the DC power source for the present 2 The DC power source is reconverted into the three phase AC power source with variable frequency When the frequency increases the rotation speed of the compressor increa...

Page 86: ...air condition with a small room temperature variation 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 table shows the functions that define the minimum and maximum frequency Forced Cooling Heating Operation For more information refer to Forced operation mode on pag...

Page 87: ...omfortable air distribution Auto Swing In case of Wall Mounted Type 50 60 71 Class The following table explains the auto swing process for heating cooling dry and fan Outline of 3 D Airflow Alternative repetition of vertical and horizontal swing motions enables uniform air conditioning of the entire room This function is effective for starting the air conditioner Detail of the Action When the hori...

Page 88: ...operates H tap 50 90 rpm 2 Fan stops during defrost operation Automatic Air Flow Control for Heating The following drawing explains the principle for fan speed control for heating Automatic Air Flow Control for Cooling The following drawing explains the principle of fan speed control for cooling Step Cooling Heating Dry mode LLL Heating thermostat OFF 25 35kW class 500 860 rpm During powerful oper...

Page 89: ...set by the microcomputer is divided into two zones Then the unit operates in the dry mode with an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Room temperature at startup Temperature ON point at which operation starts Frequency switching point Temperaturedifference for operation stop 24ºC Room temperature at startup 0 5ºC 1 5ºC 18ºC 18ºC 1 0ºC ...

Page 90: ...er setting temperature plus correction value correction value cooling 0 deg heating 2 deg 3 Operation ON OFF point and mode switching point are as follows Heating Cooling switching point Room temperature Main unit setting temperature 2 5 deg Cooling Heating switching point Room temperature Main unit setting temperature 2 5 deg Thermostat ON OFF point is the same as the ON OFF point of cooling or h...

Page 91: ...ght Set circuit continues heating or cooling the room at the set temperature for the first one hour then automatically lowers the temperature setting slightly in the case of cooling or raises it slightly in the case of heating for economical operations This prevents excessive heating in winter and excessive cooling in summer to ensure comfortable sleeping conditions and also conserves electricity ...

Page 92: ...microcomputer doesn t have a signal from the sensor in 20 minutes it judges that nobody is in the room and operates the unit in temperature sifted 2 C from the set temperature Cooling 2 C higher Dry 1 C higher and Auto according to the operation mode at that time 1 In case of Fan mode the fan speed reduces by 50 rpm If the sensor detects the outputs 10 times sec or more it judges humans exist 1sec...

Page 93: ... so as to prevent this phenomena After this 40 minutes the prohibition of the thermostat off is cancelled and it can realize the conditions to conduct thermostat off depending on the room temperature In or after this forty minutes if the sensor detects human motion detection signal it let the set temperature and the fan speed return to the original set point keeping a normal operation Others The d...

Page 94: ...d the function becomes effective when the operation is started If this button is pressed in powerful operation the powerful operation is reset and this function becomes effective The HOME LEAVE button is ineffective in dry mode and fan mode 2 Details of Function A mark representing HOME LEAVE is indicated on the liquid crystal display of the remote controller The indoor unit is operated according ...

Page 95: ...s In case of Wall Mounted Type 50 60 71 Class Ex Powerful operation in cooling mode Operation mode Fan speed Target set temperature Cooling H tap 90 rpm 18 C Dry Dry rotating speed 50 rpm Normally targeted temperature in dry operation Approx 2 C Heating H tap 90 rpm 30 C Fan H tap 90 rpm Automatic Same as cooling heating in Powerful operation The target is kept unchanged R2823 Target temp Fan 80rp...

Page 96: ...his button 1 10 4 Photocatalytic Deodorizing Filter Photocatalytic Deodorizing Filter demonstrates powerful oxidation characteristics when subjected to harmless ultraviolet light Photocatalytic deodorizing power is recovered simply by exposing the filter to the sun for 6 hours once every 6 months 1 10 5 Air Purifying Filter A double structure made up of a bacteriostatic filter and an Air Purifying...

Page 97: ...ality occur the LCD remote controller displays error code These indications allow prompt maintenance operations 1 10 9 Auto restart Function Even if a power failure including one for just a moment occurs during the operation the operation restarts in the condition before power failure automatically when power is restored Note It takes 3 minutes to restart the operation because the 3 minute standby...

Page 98: ...Swing compressor being operated by INV control Heat Pump Model Cooling Only Model Note 1 Expansion Valve In Case of 2MK X EVA B 3MK X EVA C 4MK X EVA D 2 Liquid pipe thermistor R410A Type only 2 Four way valve 1 Compressor 3 Solenoid valve EVB EVC EVD EVA Receiver 4 Expansion valve R2433 SV D 1 Compressor EVB EVC EVD EVA 4 Expansion valve R2434 ...

Page 99: ...arge piping is lower than the temperature of outdoor heat exchanger a disconnected discharge pipe thermistor can be detected B Discharge Pipe Thermistor DOT 1 Discharge pipe thermistor is used to control a discharge pipe If the temperature of discharge pipe used in place of the inner temperature of the compressor rises abnormally the operating frequency drops or the operation must be halted 2 A di...

Page 100: ...ndoor heat exchanger temperature a disconnected discharge pipe thermistor can be detected 5 An indoor heat exchanger thermistor is used for detecting incorrect wiring During the operation of checking incorrect wiring refrigerant is passed in order from the port A to detect a heat exchanger temperature and then wiring and piping will be checked 6 An indoor heat exchanger thermistor is used for sub ...

Page 101: ... of the discharge piping is lower than the temperature of outdoor heat exchanger a disconnected discharge pipe thermistor can be detected B Discharge Pipe Thermistor DOT 1 Discharge pipe thermistor is used to control a discharge pipe If the temperature of discharge pipe used in place of the inner temperature of the compressor rises abnormally the operating frequency drops or the operation must be ...

Page 102: ...ng the cooling operation if the temperature drops abnormally the operating frequency becomes lower then the operation must be halted 3 An indoor heat exchanger thermistor is used for anti icing control During the cooling operation if the heat exchanger temperature in the room where operation is halted becomes 1 C or if the room temperature heat exchanger in the room where operation is halted becom...

Page 103: ...during forced operation Determine Operating Mode Judge the operating mode command set by each room in accordance with the instructing procedure and determine the operating mode of the system The following procedure will be taken as the modes conflict with each other 1 The system will follow the mode determined first First push first set 2 For the rooms set with different mode select stand by mode ...

Page 104: ...et a minimum value as an upper limit frequency among the frequency upper limits of the following functions Compressor protection input current discharge pipes Low Hz high pressure peak cutting freeze up protection defrost 3 Determine lower limit frequency Set a maximum value as an lower limit frequency among the frequency lower limits of the following functions Four way valve operating compensatio...

Page 105: ...ency Up Down by D Signal 1 P control Calculate a total of the D value in each sampling time 20 seconds and adjust the frequency according to its difference from the frequency previously calculated 2 I control If the operating frequency is not change more than a certain fixed time adjust the frequency up and down according to the Σ D value obtaining the fixed Σ D value When the Σ D value is small l...

Page 106: ...er the operation stopped Detail The OFF delay of four way valve Energize the coil for 150 sec after unit operation is stopped 3 3 3 Four Way Valve Operation Compensation Outline Heat Pump Only At the beginning of the operation as the four way valve is switched acquire the differential pressure required for activating the four way valve by having output the operating frequency which is more than a ...

Page 107: ...p zone the compressor operation stops If a drooping current is continues for 1 0 second after rushing on the drooping zone the frequency will be 2 Hz drooping Repeating the above drooping continues until the current rushes on the drooping zone without change In the unchanged zone the frequency limit will remain In the return reset zone the frequency limit will be cancelled Limitation of current dr...

Page 108: ...sec from changing number of operation room Control in Each Zone 3 7 Heating Peak cut Control Outline Heat Pump Only During heating operation the signals being sent form the indoor unit allow the operating frequency limitation and prevent abnormal high pressure The signal from the indoor unit must be divided as follows Detail Conditions for Start Controlling Judge the controlling start with the ind...

Page 109: ...erature is more than 10 C the fan must be turned OFF for 30 seconds Tap Control in Indoor Outdoor Unit Silent Operation 1 When Cooling Operation When the outdoor air temperature is less than 37 C the fan tap must be set to L 2 When Heating Operation When the outdoor air temperature is more than 4 C the fan tap must be turned to L only for heat pump model 3 9 Moisture Protection Function 2 Outline ...

Page 110: ...s after the compressor is started and more than 47 minutes of accumulated time pass since the start of the operation or ending the defrosting Conditions for Canceling Defrost The judgment must be made with heat exchanger temperature 4 C 12 C 3 11 Low Hz High Pressure Limit Outline Heat Pump Only Set the upper limit of high pressure in a low Hz zone Set the upper limit of the indoor heat exchanger ...

Page 111: ...Control 1 Electronic expansion valve control when starting operation 2 Control when frequency changed 3 Control for defrosting only for heat pump model 4 Oil recover control 5 Control when a discharge pipe temperature is abnormally high 6 Control when the discharge pipe thermistor is disconnected 7 Control for indoor unit freeze up protection Feedback Control 1 Discharge pipe temperature control D...

Page 112: ...re equalizing control Gas pipe isothermal control SC control only for heat pump model Control when frequency changed Control for abnormally high discharge pipe temperature Liquid pipe temperature control for stopped rooms Dew prevention control for indoor rotor Oil recovery control Indoor freeze up protection control Liquid pipe temperature control When power is turned ON Cooling 1 room operation ...

Page 113: ...be super heated or moistened 3 12 5 High Temperature of the Discharge Pipe When the compressor is operating if the discharge pipe temperature exceeds a certain value open the electronic expansion valve and remove the refrigerant to the low pressure side and lower discharge temperature 3 12 6 Oil Recovery Function Outline The electronic expansion valve opening in the cooling stopped room must be se...

Page 114: ...emperature difference between the maximum heat exchanger temperature of connected room and the temperature of liquid pipe thermistor becomes constant 3 12 10Disconnection of the Discharge Pipe Thermistor Outline Detect a disconnected discharge pipe thermistor by comparing the discharge pipe temperature with the condensation temperature If any is disconnected open the electronic expansion valve acc...

Page 115: ...y is changed When the target pipe temperature control is active if the target frequency is changed for a specified value in a certain time period cancel the target discharge pipe temperature control and change the opening of the target electronic expansion valve according to the shift ...

Page 116: ...rent exceeds 30 A the compressor gets interrupted too 3 13 3 Insufficient Gas Control Outline If a power consumption is below the specified value in which the frequency is higher than the specified frequency it must be regarded as gas insufficient In addition to such conventional function if the discharge temperature is higher than the target discharge pipe temperature and more than the specified ...

Page 117: ...is not abnormal but the indoor unit which is not in the freezing prohibiting zone is present in more than 1 room 1 The indoor unit is not abnormal The indoor unit which is not in the peak cut prohibited zone is present in more than 1 room 2 The outdoor unit is not abnormal and not in the 3 minute stand by mode 3 The operating mode of the outdoor unit is the stop mode 4 The slide selection switch o...

Page 118: ...e indoor unit heat exchanger thermistor is disconnected An indoor unit is in trouble if a trouble occurs during the wiring error checking Emergency stop Any of the LED indicators 1 4 stays on Note 1 It takes about 10 15 minutes after pressing the wiring error check switch to complete the checking Wrong wiring between the upper and lower units cannot be self corrected 2 Wrongly connected liquid and...

Page 119: ...rced operation is over LED1 Room A wiring LED2 Room B wiring 1st flashing LED Port A piping 2nd flashing LED Port B piping The first stay on LED means the room that is connected with Port A The next stay on LED means the one connected with Port B Example Let s suppose the LED indicators are flashing as follows The above means that Port A is connected with Port B and Port B with Room A or self corr...

Page 120: ...oom can be set as the priority room Control start conditions Priority room setting is made AND Powerful signal from the priority room unit is received Note The operation mode of the priority room unit has precedence Cancellation of control The control function is canceled when the Powerful operation mode is switched off or 20 minutes elapse after Powerful Operation started 3 16 3 Powerful Operatio...

Page 121: ...ing to only cool C Short circuit pins 1 and 3 of the connector S100 Setting to only heat H short circuit pins 3 and 5 of the connector S100 The following specifications apply to the connector housing and pins JST products Housing VHR 5N Pin SVH 21T 1 1 Note that forced operation is also possible in COOL HEAT mode COOL mode C HEAT mode C 5 C 3 H 1 R1397 ...

Page 122: ... Contents by the Models 113 2 2 Safety Precautions 114 2 3 Names of Parts 116 2 4 Preparation before Operation 128 2 5 AUTO DRY COOL HEAT FAN Operation 131 2 6 Adjusting the Air Flow Direction 133 2 7 POWERFUL Operation 139 2 8 OUTDOOR UNIT SILENT Operation 140 2 9 HOME LEAVE Operation 141 2 10 INTELLIGENT EYE Operation 143 2 11 TIMER Operation 147 2 12 Note for Multi System 149 2 13 Care and Clea...

Page 123: ... to know a clever method of using it In order to meet this expectation of the users giving sufficient explanations taking enough time can be said to reduce about 80 of the requests for servicing However good the installation work is and however good the functions are the customer may blame either the room air conditioner or its installation work because of improper handling The installation work a...

Page 124: ...before Operation Safety Precautions 114 114 114 114 Names of Parts 116 119 122 125 Preparation before Operation 128 128 128 128 Operation AUTO DRY COOL HEAT FAN Operation 131 131 131 131 Adjusting the Air Flow Direction 133 135 137 POWERFUL Operation 139 139 139 139 OUTDOOR UNIT SILENT Operation 140 140 140 140 HOME LEAVE Operation 141 141 141 141 INTELLIGENT EYE Operation 143 145 TIMER Operation ...

Page 125: ...gerant check the content of the repairs with our service staff Do not attempt to install the air conditioner by your self Incorrect work will result in water leakage electric shocks or fire For installation consult the dealer or a qualified technician In order to avoid electric shock fire or injury if you detect any abnormally such as smell of fire stop the operation and turn off the breaker And c...

Page 126: ...ge Incomplete draining may cause wetting of the building furniture etc Do not operate the air conditioner with wet hands Do not wash the indoor unit with excessive water only use a slightly wet cloth Do not place things such as vessels containing water or anything else on top of the unit Water may pene trate into the unit and degrade electrical insulations resulting in an electric shock To install...

Page 127: ...Instruction Si12 308 116 System Configuration 2 3 Names of Parts FTK X E 25 35 B Names of parts Indoor Unit ON OFF 1 3 4 5 6 7 9 10 11 2 14 15 16 8 12 13 ...

Page 128: ...h once to start operation Push once again to stop it The operation mode refers to the following table This switch is useful when the remote controller is missing 13 Operation lamp green 14 TIMER lamp Yellow 15 HOME LEAVE lamp red 16 Signal receiver It receives signals from the remote controller When the unit receives a signal you will hear a short beep Operation start beep beep Settings changed be...

Page 129: ... this button once to start operation Press once again to stop it 7 MODE selector button It selects the operation mode AUTO DRY COOL HEAT FAN 8 SILENT button for OUTDOOR UNIT SILENT operation Only works for multi connection 9 FAN setting button It selects the air flow rate setting 10 SWING button 11 SENSOR button for INTELLIGENT EYE operation 12 ON TIMER button 13 OFF TIMER button 14 TIMER Setting ...

Page 130: ...Si12 308 Instruction System Configuration 119 FTK X D 50 60 71 B Names of parts Indoor Unit Main unit control panel 7 14 11 12 13 4 3 1 2 9 10 8 6 5 16 15 ...

Page 131: ...AVE Operation 14 Indoor Unit ON OFF switch 2Push this switch once to start operation Push once again to stop it 2The operation mode refer to the following table 2This switch is useful when the remote controller is missing 15 Room temperature sensor 2It senses the air temperature around the unit 16 Signal receiver 2It receives signals from the remote controller 2When the unit receives a signal you ...

Page 132: ...once to start operation Press once again to stop it 7 MODE selector button It selects the operation mode AUTO DRY COOL HEAT FAN 8 SILENT button for OUTDOOR UNIT SILENT operation 9 FAN setting button It selects the air flow rate setting 10 SENSOR button for INTELLIGENT EYE operation 11 SWING button Flap Horizontal blade 12 SWING button Louver Vertical blades 13 ON TIMER button 14 OFF TIMER button 1...

Page 133: ...Instruction Si12 308 122 System Configuration CDK X 25 35 50 60 A Names of parts Indoor Unit 1 3 4 5 6 8 9 10 7 2 ...

Page 134: ...Operation lamp green 8 TIMER lamp yellow 9 HOME LEAVE lamp red LIghts up when you use HOME LEAVE operation 10 Indoor Unit ON OFF switch Push this switch once to start operation Push once again to stop it This switch is useful when the remote controller is missing The operation mode refers to the following table Outdoor Unit 11 Air inlet Back and side 12 Refrigerant piping and inter unit cable 13 D...

Page 135: ... It changes the temperature setting 6 ON OFF button Press this button once to start operation Press once again to stop it 7 MODE selector button It selects the operation mode AUTO DRY COOL HEAT FAN 8 SILENT button for OUTDOOR UNIT SILENT operation 9 FAN setting button It selects the air flow rate setting 10 ON TIMER button 11 OFF TIMER button 12 TIMER Setting button It changes the time setting 13 ...

Page 136: ...he ceiling or to a wall The descriptions contained in this manual show the case when installation is being carried out to the ceiling The methods of operation used are the same when installing to a wall CAUTION Before opening the front grille be sure to stop the operation and turn the breaker OFF O N OFF 1 2 3 4 5 6 11 12 10 7 9 8 13 14 ...

Page 137: ...art operation Push once again to stop it 2 Push the switch using an object with a sharp tip such as a pen 2 This switch is useful when the remote controller is missing 14 Signal receiver 2 It receives signals from the remote controller 2 When the unit receives a signal you will hear a short beep 2 Operation start beep beep 2 Settings changed beep 2 Operation stop beeeeep 2 The operation mode refer...

Page 138: ...t changes the temperature setting 6 ON OFF button Press this button once to start operation Press once again to stop it 7 MODE selector button It selects the operation mode AUTO DRY COOL HEAT FAN 8 OUTDOOR UNIT SILENT button 9 FAN setting button It selects the air flow rate setting 10 SWING button 11 ON TIMER button 12 OFF TIMER button 13 TIMER Setting button It changes the time setting 14 TIMER C...

Page 139: ...me type and replace the two old batteries together When the system is not used for a long time take the batteries out We recommend replacing once a year although if the remote controller display begins to fade or if reception deteriorates please replace with new alkali batteries Using manganese batteries reduces the lifespan The attached batteries are provided for the initial use of the system The...

Page 140: ...each the unit 2 Fix the holder to a wall a pillar etc with the screws supplied with the holder 3 Place the remote controller in the remote controller holder ATTENTION About remote controller Never expose the remote controller to direct sunlight Dust on the signal transmitter or receiver will reduce the sensitivity Wipe off dust with soft cloth Signal communication may be disabled if an electronic ...

Page 141: ...g period for example in spring or autumn turn the breaker OFF Use the air conditioner in the following conditions Operation outside this humidity or temperature range may cause a safety device to disable the system C TEMP ON OFF POWERFUL HOME LEAVE MODE TIMER FAN SWING SILENT SENSOR ON CANCEL OFF 1 3 2 Recommended temperature setting For cooling 26 C 28 C For heating 20 C 24 C Mode Operating condi...

Page 142: ... the button advances the mode setting in sequence AUTO DRY COOL HEAT FAN 2 Press ON OFF button The OPERATION lamp lights up To stop operation 3 Press ON OFF button again Then OPERATION lamp goes off To change the temperature setting 4 Press TEMPERATURE adjustment button DRY or FAN mode AUTO or COOL or HEAT mode The temperature setting is not variable Press to raise the temperature and press to low...

Page 143: ... air around all parts of the room After the start of heating operation it takes some time before the room gets warmer In heating operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air does not flow out of indoor unit Note on DRY operation The computer chip wor...

Page 144: ...n to increase your com fort To adjust the horizontal blades flaps 1 Press SWING button The display will light up and the flaps will begin to swing 2 When the flaps have reached the desired position press SWING button once more The display will go blank The flaps will stop moving C TEMP ON OFF POWERFUL HOME LEAVE MODE TIMER FAN SWING SILENT SENSOR ON CANCEL OFF O N 1 2 ...

Page 145: ...s on the operation mode See the figure ATTENTION Always use a remote controller to adjust the flaps angle If you attempt to move it forcibly with hand when it is swinging the mechanism may be broken Be careful when adjusting the louvres Inside the air outlet a fan is rotating at a high speed In DRY mode or COOL mode In HEAT or FAN mode When stop operation Upper limit in cooling Lower limit in cool...

Page 146: ...en the flap have reached the desired position press SWING button once more The display will go blank The flap will stop moving To adjust the vertical blades louvers 3 Press SWING button The display will light up and the louvers will begin to swing 4 When the louvers have reached the desired position press the SWING button once more The display will go blank The louvers will stop moving C TEMP ON O...

Page 147: ...ed the flaps swinging range depends on the operation mode See the figure Three Dimensional 3 D Airflow Using three dimensional airflow circulates cold air which tends to collected at the bottom of the room and hot air which tends to collect near the ceiling throughout the room preventing areas of cold and hot developing ATTENTION Always use a remote controller to adjust the flaps angle If you atte...

Page 148: ...e your com fort To adjust the horizontal blade flap 1 Press SWING button The display will light up and the flaps will begin to swing 2 When the flaps have reached the desired position press SWING button once more The display will go blank The flaps will stop moving C TEMP ON OFF POWERFUL HOME LEAVE MODE TIMER FAN SWING SILENT ON CANCEL OFF O N 1 2 ...

Page 149: ...lected you should set the flap at a near horizontal angle in COOL or DRY mode to obtain the best performance In COOL or DRY mode if the flap is fixed at a downward position the flap automatically moves in about 60 minutes to prevent condensation on it ATTENTION Always use a remote controller to adjust the flap angle If you attempt to move it forcibly with hand when it is swinging the mechanism may...

Page 150: ...nctions which are not available To cancel POWERFUL operation 2 Press POWERFUL button again NOTE Notes on POWERFUL operation In COOL and HEAT mode To maximize the cooling heating effect the capacity of outdoor unit must be increased and the air flow rate be fixed to the maximum setting The temperature and air flow settings are not variable In DRY mode The temperature setting is lowered by 2 5 C and...

Page 151: ...ng a multi system this function will work only when the OUTDOOR UNIT SILENT operation is set on all operated indoor units However if using priority room setting see Note for multi system This function is available in COOL HEAT and AUTO modes This is not available in FAN and DRY mode POWERFUL operation and OUTDOOR UNIT SILENT operation cannot be used at the same time Priority is given to POWERFUL o...

Page 152: ... time please set the temperature and air flow rate for HOME LEAVE operation Record your preferred temperature and air flow rate 1 Press HOME LEAVE button Make sure is displayed in the remote control display 2 Adjust the set temperature with or as you like 3 Adjust the air flow rate with FAN setting button as you like Home leave operation will run with these settings the next time you use this func...

Page 153: ...be welcomed by a comfortably air conditioned room Push the HOME LEAVE Opera tion button again and the air con ditioner will adjust capacity to the set temperature for normal opera tion Set the unit to HOME LEAVE Oper ation before leaving the living room when going to bed The unit will maintain the tem perature in the room at a com fortable level while you sleep When you enter the living room in th...

Page 154: ...movement To start INTELLIGENT EYE operation 1 Press SENSOR button To cancel the INTELLIGENT EYE operation 2 Press SENSOR button again EX C TEMP ON OFF POWERFUL HOME LEAVE MODE TIMER FAN SWING SILENT SENSOR ON CANCEL OFF 1 2 When somebody in the room Normal operation When nobody in the room 20 min after start energy saving operation Somebody back in the room Back to normal operation ...

Page 155: ...tect moving objects further than 5m away Check the application range Sensor detection sensitivity changes according to indoor unit location the speed of pass ersby temperature range etc The sensor also mistakenly detects pets sunlight fluttering curtains and light reflected off of mirrors as passersby INTELLIGENT EYE operatipon will not go on during powerful operation Night set mode will not go on...

Page 156: ...art INTELLIGENT EYE operation 1 Press SENSOR button To cancel the INTELLIGENT EYE operation 2 Press SENSOR button again EX C TEMP ON OFF POWERFUL HOME LEAVE MODE TIMER FAN SILENT ON CANCEL OFF SWING 1 2 SENSOR When somebody in the room Normal operation When nobody in the room 20 min after start energy saving operation Somebody back in the room Back to normal operation ...

Page 157: ...unit location the speed of passersby temperature range etc The sensor also mistakenly detects pets sunlight fluttering curtains and light reflected off of mirrors as passersby INTELLIGENT EYE operation will not go on during powerful operation Night set mode will not go on during you use INTELLIGENT EYE operation Do not place large objects near the sensor Also keep heating units or humidifiers outs...

Page 158: ...s the setting rapidly 3 Press OFF TIMER button again The TIMER lamp lights up To cancel the OFF TIMER operation 4 Press CANCEL button The TIMER lamp goes off Notes When TIMER is set the present time is not displayed Once you set ON OFF TIMER the time setting is kept in the memory The memory is canceled when remote controller batteries are replaced When operating the unit via the ON OFF Timer the a...

Page 159: ...ing rapidly 3 Press ON TIMER button again The TIMER lamp lights up To cancel ON TIMER operation 4 Press CANCEL button The TIMER lamp goes off To combine ON TIMER and OFF TIMER A sample setting for combining the two timers is shown below ATTENTION In the following cases set the timer again After a breaker has turned OFF After a power failure After replacing batteries in the remote controller C TEMP...

Page 160: ...IGHT QUIET Mode requires initial programming during installation Please consult your retailer or dealer for assistance NIGHT QUIET Mode reduces the operation noise of the outdoor unit during the night time hours to prevent annoyance to neighbors The NIGHT QUIET Mode is activated when the temperature drops 5 C or more below the highest temperature recorded that day Therefore when the temperature di...

Page 161: ...d D are all operating If the unit in Room A enters POWERFUL operation operation capacity will be concentrated in Room A In such a case the cooling heating efficiency of the units in Rooms B C and D may be slightly reduced 3 Priority when using OUTDOOR UNIT SILENT operation Example Room A is the Priority Room in the examples Just by setting the unit in Room A to SILENT operation the air conditioner...

Page 162: ...ront grille Set the 3 keys of the front grille into the slots and push them in all the way Close the front grille slowly and push the grille at the 3 points 1 on each sides and 1 in the middle Check to see if the rotating axis in the upper center section is moving CAUTION Units Don t touch the metal parts of the indoor unit If you touch those parts this may cause an injury When removing or attachi...

Page 163: ...em with neutral detergent thinned with lukewarm water then dry them up in the shade It is recommended to clean the air filters every two weeks Air Purifying Filter green Replace approximately once every 3 months 1 Detach the filter element and attach a new one Insert with the green side up It is recommended to replace the air purifying filter every three months Photocatalytic Deodorizing Filter gr...

Page 164: ...e leaking from the indoor unit Stop operation and consult the ser vice shop if this is the case Operation with dirty filters 1 cannot deodorize the air 2 cannot clean the air 3 results in poor heating or cooling 4 may cause odour The air purifying filter and Photocatalytic deodorizing filter cannot be reused even if washed In principle there is no need to replace the photocatalytic deodorizing fil...

Page 165: ...ter dry it with cloth dry it up in the shade after washing 4 Attach the front grille Align the rotation dowels on the left and right of the front panel with the slots then push them all the way in Close the front panel slowly Press the panel at both sides and the center CAUTION Units Don t touch the metal parts of the indoor unit If you touch those parts this may cause an injury When removing or a...

Page 166: ... does not come off easily wash them with neutral detergent thinned with lukewarm water then dry them up in the shade It is recommended to clean the air filters every two weeks Air purifying filter with photocatalytie deodorizing function gray The air purifying capacity of the photocatalytic purifying filter can be renewed by washing it with water once every 6 months We recommend replacing it once ...

Page 167: ...ng blocks the air inlets and the outlets of the indoor unit and the outdoor unit Check that the earth wire is not disconnected or broken Check that the drain comes smoothly out of the drain hose during COOL or DRY operation If no drain water is seen water may be leaking from the indoor unit Stop operation and consult the ser vice shop if this is the case Operation with dirty filters 1 cannot deodo...

Page 168: ...on 2 Clean the air filters and set them again 3 Take out batteries from the remote controller 4 Turn OFF the breaker for the room air conditioner When a multi outdoor unit is connected make sure the heating operation is not used at the other room before you use the fan operation NOTE Check that the base stand and other fittings of the outdoor unit are not decayed or corroded Check that nothing blo...

Page 169: ...ndicated by Operation without air filters may result in troubles as dust will accumulate inside the indoor unit CAUTION Units Don t touch the metal parts of the indoor unit If you touch those parts this may cause an injury When opening and closing the front grille use a robust and stable stool and watch your steps carefully When opening and closing the front grille support the grille securely with...

Page 170: ...ewarm water then dry them up in the shade It is recommended to clean the air filters every two weeks Air Purifying Filter green Replace approximately once every 3 months 1 Detach the filter element and attach a new one Insert with the green side up It is recommended to replace the air purifying filter every three months Photocatalytic Deodorizing Filter gray Maintenance 1 Dry the photocatalytic de...

Page 171: ... be leaking from the indoor unit Stop operation and consult the ser vice shop if this is the case Operation with dirty filters 1 cannot deodorize the air 2 cannot clean the air 3 results in poor heating or cooling 4 may cause odour The air purifying filter and Photocatalytic deodorizing filter cannot be reused even if washed In principle there is no need to replace the photocatalytic deodorizing f...

Page 172: ... or steam when the air conditioner is in defrost operation In COOL or DRY mode Moisture in the air condenses into water on the cool surface of outdoor unit piping and drips Mists come out of the indoor unit This happens when the air in the room is cooled into mist by the cold air flow during cooling operation The indoor unit gives out odour This happens when smells of the room furniture or cigaret...

Page 173: ...lock the air inlet or the outlet of the indoor and the outdoor units Clean the air filters or take all obstacles away and turn the breaker OFF Then turn it ON again and try operating the air conditioner with the remote controller If the lamp still flashes call the service shop where you bought the air conditioner Are operation modes all the same for indoor units connected to outdoor units in the m...

Page 174: ...mance It is recommended to have periodical maintenance by a specialist aside from regular cleaning by the user For specialist maintenance contact the service shop where you bought the air conditioner The maintenance cost must be born by the user Call the service shop immediately After a power failure The air conditioner automatically resumes operation in about 3 minutes You should just wait for a ...

Page 175: ...Instruction Si12 308 164 System Configuration ...

Page 176: ...Motor Shutter Limit Switch Abnormality 179 5 8 Signal Transmission Error between Indoor and Outdoor Units 180 5 9 Unspecified Voltage between Indoor and Outdoor Units 181 5 10 Freeze up Protection Control 182 5 11 OL Activation Compressor Overload 184 5 12 Compressor Lock 185 5 13 DC Fan Lock 186 5 14 Input Over Current Detection 187 5 15 Four Way Valve Abnormality 189 5 16 Discharge Pipe Temperat...

Page 177: ...nduct the diagnostic procedure described in the following pages Location of Operation Lamp In case of FTK X S 25 35 B Series FTK X E 25 35 B Series In case of FTK X S 50 60 71 B Series FTK X D 50 60 71 B Series In case of CDK X S 25 35 50 60 B Series CDK X 25 35 50 60 A B Series In case of FVK X S 25 35 50 B Series In case of FLK X S 25 35 50 60 B Series FLK X 25 35 50 60 A Series R3058 ON OFF Ind...

Page 178: ...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 indoor unit which the different operation mode is set later The first set operation mode has priority Troubleshooting with the LED Indication Outdoor Unit There are green and red LEDs on the PCB The flashing green LED indicates normal equipment condit...

Page 179: ...indication 171 Diagnosis with outdoor unit LED indication 172 Some indoor units do not operate Check the type of the indoor units Check to make sure that the indoor unit type is compatible with the outdoor unit Diagnosis with indoor unit LED indication 171 Diagnosis with outdoor unit LED indication 172 Equipment operates but does not cool or does not heat only for heat pump model Check for wiring ...

Page 180: ...7 E5 17 C4 27 L4 8 LC 18 C5 28 H6 9 C9 19 H9 29 H7 10 U0 20 J6 30 U2 C O N TEMP ON OFF POWERFUL HOME LEAVE MODE TIMER FAN SWING SILENT SENSOR ON CANCEL OFF Signal transmitter It sends signals to the indoor unit Display It displays the current settings In this illustration each section is shown with all its displays ON for the purpose of explanation HOME LEAVE button ON TIMER button ON OFF button O...

Page 181: ...rature thermistor abnormality C7 Shutter drive motor shutter limit switch abnormality C9 Room temperature thermistor abnormality Outdoor Unit E5 OL activation compressor overloaded E6 Compressor lock E7 DC fan lock E8 Input over current detection EA Four way valve abnormality F3 Discharge pipe temperature control H6 Position sensor abnormality H8 CT or related abnormality H9 Outdoor air thermistor...

Page 182: ...ct a diagnosis of the outdoor unit A1 Indoor unit PCB abnormality 173 A5 Freeze up protection control or high pressure control heat pump model only 174 A6 Fan motor DC motor or related abnormality 176 C4 Heat exchanger thermistor or related abnormality 178 C7 Shutter drive motor shutter limit switch abnormality 179 C9 Room temperature thermistor abnormality 178 U4 Signal transmission error between...

Page 183: ...d page Green Red A 1 2 3 4 5 3 3 3 3 00 Outdoor unit in normal condition Conduct a diagnosis of the indoor unit UA Unspecified voltage between indoor and outdoor units 206 UH Anti icing function in other rooms 206 5 3 3 4 4 U0 Insufficient gas 203 5 4 3 4 3 E5 OL activation compressor overload 184 5 3 4 4 3 E6 Compressor lock 185 5 4 3 4 3 F3 Discharge pipe temperature control 191 5 3 3 3 4 L4 Rad...

Page 184: ...oubleshooting Note Connector Nos vary depending on models Control connector Connector connection check note YES Is it normal NO Correct connections Replace PCBs R1400 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Model Type Connector No Wall Mounted Type 25 35 class Terminal strip Control PCB Wall Mounted Type 50 60 71 class Termina...

Page 185: ...n according to the temperature detected by the indoor unit heat exchanger thermistor Malfunction Decision Conditions High pressure control During heating operations the temperature detected by the indoor heat exchanger thermistor is above 65 C Freeze up protection When the indoor unit heat exchanger temperature is below 0 C during cooling operation Supposed Causes Operation halt due to clogged air...

Page 186: ...ger thermistor check Check the intake air filter Check the air passage YES YES R1401 Check the dust accumulation on the indoor unit heat exchanger YES YES Is there any short circuit Is it very dirty Is it very dirty Does it conform to the thermistor characteristic chart NO Provide sufficient air passage Clean the air filter Clean the heat exchanger Replace the indoor unit PCB Replace the thermisto...

Page 187: ...an motor operation Malfunction Decision Conditions When the detected rotation speed is less than 50 of the H tap under maximum fan motor rotation demand Supposed Causes Operation halt due to short circuit inside the fan motor winding Operation halt due to breaking of wire inside the fan motor Operation halt due to breaking of the fan motor lead wires Operation halt due to faulty capacitor of the f...

Page 188: ...put of fan motor connector Is motor power voltage DC 200V generated Is motor control power voltage DC 15V generated Turn off power supply and disconnect fan motor connector then turn power ON again Does it rotate Stop fan motor Is rotation number command pulse generated Is rotation number command pulse generated Check No 01 Check output of fan motor connector Check No 01 Check output of fan motor ...

Page 189: ...n 120 ohms or below about 50 C more than 1 860 kohms Note The values vary slightly in some models Supposed Causes Faulty connector connection Faulty thermistor Faulty PCB Troubleshooting Check No 6 Refer to P 210 C4 Heat exchanger temperature thermistor C9 Room temperature thermistor Check the connector connection YES Correct the connection Replace the thermistor Replace the indoor unit PCB Replac...

Page 190: ... relay harness or disconnected connector Detection error due to defective PCB 2 Foreign substance in blow port Troubleshooting Check No 3 Refer to P 207 Turn off the power Check No 3 Check the limit switch continuity Remove such substance Replace the limit switch Reconnect the connector or replace the relay harness Replace the shutter drive motor or the PC board 2 Check the shutter s sealing mater...

Page 191: ...nal transmission error due to breaking of wire in the connection wires between the indoor and outdoor units wire No 2 Troubleshooting Check No 10 Refer to P 213 Check the outdoor unit s LED A Check the indoor unit outdoor unit connection wires YES YES Correct the indoor unit outdoor unit connection wires Diagnose the outdoor unit Replace the connection wires between the indoor and outdoor units Re...

Page 192: ...odels interconnected Wrong indoor unit PCB mounted Indoor unit PCB defective Wrong outdoor unit PCB mounted or defective Troubleshooting Check the indoor and outdoor unit model numbers Match the compatible models Change for the specified PC board 1 or 2 Replace the indoor unit PC board 1 or the outdoor unit PC board Q0347 Caution Be sure to turn off power switch before connect or disconnect connec...

Page 193: ...e following conditions A and B are kept together for 5 minutes A Indoor unit heat exchanger temperature 1 C B Indoor unit heat exchanger temperature Room temperature 10 C If the indoor unit icing protector is activated four times straight the system will be shut down The 4 time counter will reset itself if any of the following errors does not occur during the compressor running time total time OL ...

Page 194: ...hanger thermistor Do the vacuum drying Replace the indoor unit PCB and then start the wiring error check mode R3059 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Wiring or piping out of spec YES NO NO YES NO YES NO YES YES NO Error again Motor functioning Thermistor as specified in its characteristic chart Thermistor as specified in...

Page 195: ... off valve defective Troubleshooting Check No 4 Refer to P 208 Check No 5 Refer to P 209 Check No 6 Refer to P 210 Check No 11 Refer to P 213 Insert the thermistor in position Replace the discharge pipe thermistor Replace the valve itself or the coil Replace the four way valve coil or the valve itself Replace the outdoor unit PCB Refer to the refrigerant line check procedure Replace the outdoor un...

Page 196: ...hut down if the error occurs 16 times Clearing condition Continuous run for about 5 minutes normal Supposed Causes Compressor locked Troubleshooting Turn off the power Disconnect the harnesses U V and W Inverter checker Part No 1225477 Correct the power supply or replace the SPM Replace the outdoor unit PCB Replace the compressor Check the electronic expansion valve Replace it as required Replace ...

Page 197: ...ition Continuous run for about 5 minutes normal Supposed Causes Fan motor breakdown Harness or connector disconnected between fan motor and PCB or in poor contact Foreign matters stuck in the fan Troubleshooting Check No 15 Refer to P 215 Turn off the power and reconnect the connector Remove Replace the outdoor unit fan motor Replace the outdoor unit PCB R2843 Caution Be sure to turn off power swi...

Page 198: ...n Conditions The following CT input with the compressor running continues for 2 5 seconds CT input Above 20 A The system will be shut down if the error occurs 16 times Clearing condition Continuous run for about 5 minutes normal Supposed Causes Over current due to compressor failure Over current due to defective power transistor Over current due to defective inverter main circuit electrolytic capa...

Page 199: ...above its stop level NO YES Normal NO YES Any LED off YES NO Check with the inverter checker Turn off the power and reconnect the harnesses Turn on the power again and get restarted Turn off the power and disconnect the harnesses U V and W Get restarted and measure the input current Check No 8 Check the discharge pressure Check No 7 Check the installation condition Check No 14 Check the main circu...

Page 200: ...thin their normal ranges in the operating mode Malfunction Decision Conditions Either of the following conditions occurs 3 minutes after the compressor has started Cooling dry operation Outdoor unit heat exchanger temperature Liquid pipe temperature 5 C Heating operation Liquid pipe temperature Outdoor unit heat exchanger temperature 5 C Supposed Causes Connector in poor contact Thermistor defecti...

Page 201: ...urn off power switch before connect or disconnect connector or parts damage may be occurred Four way valve coil disconnected loose YES YES NO Functioning NO Check No 11 Check the refrigerant line Malfunctioning l Water mixed l Shut off valve defective Harness out of connector NO YES Disconnect the harness from the connector Resistance between harnesses about 1500 ohms Malfunctioning Functioning Ch...

Page 202: ...set itself if this or any other error does not occur during the following 60 minute compressor running time total time Supposed Causes Refrigerant shortage Four way valve malfunctioning Discharge pipe thermistor defective heat exchanger or outdoor temperature thermistor defective Outdoor unit PCB defective Water mixed in the local piping Electronic expansion valve defective Stop valve defective Tr...

Page 203: ...ssor relay cable disconnected Compressor itself defective Outdoor unit PCB defective Stop valve closed Input voltage out of specification Troubleshooting Check No 13 Refer to P 214 Replace the outdoor unit PCB outdoor unit fan Replace the outdoor unit PCB Reconnect as specified Inverter checker Part No 1225477 Correct the power supply or replace the outdoor unit PCB Replace the compressor R2847 Ca...

Page 204: ...rrent Malfunction Decision Conditions The compressor running frequency is below 55 Hz and the CT input is below 0 1 V The input current is also below 1 25 A If this error repeats 4 times the system will be shut down The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time Supposed Causes Power transistor defecti...

Page 205: ...itch before connect or disconnect connector or parts damage may be occurred Running current as shown at right with relay cable 1 or 2 YES Current guideline 2 sec Time Rising with increasing frequency Capacitor charged when the indoor unit or outdoor unit main relay turns on NO NO DC380 30V YES Voltage within the allowable range Supply voltage 15 YES NO Any LED off Compressor running YES NO YES NO ...

Page 206: ...stor Malfunction Decision Conditions When the thermistor input is above 4 96 V or below 0 04 V with the power on the J3 error is judged if the discharge pipe thermistor temperature is smaller than the condenser thermistor temperature or the system will be shut down if all the units are judged with the J8 error Supposed Causes Connector in poor contact Thermistor defective Outdoor unit PCB defectiv...

Page 207: ...ature thermistor Replace the following thermistor l Indoor unit heat exchanger thermistor Replace the outdoor unit PC board Replace the indoor unit PC board Q0357 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error displayed again on remote controller NO YES YES YES NO Indoor unit heat exchanger thermistor functioning NO Connector o...

Page 208: ...ecking the radiation fin thermistor with the compressor off Malfunction Decision Conditions With the compressor off the radiation fin temperature is above 80 C above 75 C in the case of 8 0 9 0kW class Reset is made when the temperature drops below 70 C Supposed Causes Fin temperature rise due to defective outdoor unit fan Fin temperature rise due to short circuit Fin thermistor defective Connecto...

Page 209: ...tion Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error again or outdoor unit fan activated YES l Fin thermistor NO Slightly dirty Check No 9 Check the outdoor unit fan or related Malfunctioning Radiation fin dirty Too dirty Functioning Thermistor as specified in its characteristic chart Above 80 C NO YES NO YES Check the radiation fin tem...

Page 210: ...adiation fin temperature with the compressor on is above 90 C for 5 2 7 5 kW or smaller class systems or above 85 C for 8 0 9 0 kW class systems If a radiation fin temperature rise takes place 4 times successively the system will be shut down The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time Supposed Caus...

Page 211: ...or the power transistor Replace the fan motor Correct the connectors and fan motor leads Replace the outdoor unit PCB Clean up the radiation fin R2851 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error displayed again YES NO Slightly dirty Check No 9 Check the outdoor unit fan or related Malfunctioning Radiation fin dirty Too dirty...

Page 212: ...s while the compressor is running An output over current input is fed from the output over current detection circuit to the microcomputer The system will be shut down if the error occurs 16 times Clearing condition Continuous run for about 5 minutes normal Supposed Causes Over current due to defective power transistor Over current due to wrong internal wiring Over current due to abnormal supply vo...

Page 213: ...ected for part replacement for example and the system is interrupted by an output over current take the following procedure Error again NO YES NO YES Voltage as rated YES NO Short circuit or breakage between compressor s coil phases NO YES Normal YES NO Any LED off Turn off the power and turn it on again to get the system started See if the same error occurs Turn off the power and disconnect the h...

Page 214: ...as shortage detection I Input current 8 78 256 A Hz x Compressor running frequency 0 25 However when the status of running frequency 55 Hz is kept on for a certain time Note The values are different from model to model Gas shortage detection II If a gas shortage error takes place 4 times straight the system will be shut down The error counter will reset itself if this or any other error does not o...

Page 215: ...exchanger thermistor 1 Replace the PCB 2 Replace the compressor Procedure complete R2853 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Any thermistor disconnected YES Malfunctioning Malfunctioning NO Functioning Stop valve closed NO YES Check the CT YES NO Gas shortage error again Functioning Check No 6 Check the thermistors YES NO ...

Page 216: ... times Clearing condition Continuous run for about 60 minutes normal Supposed Causes Supply voltage not as specified Over voltage detector or DC voltage detection circuit defective PAM control part s defective Troubleshooting Check the supply voltage Correct the power supply Check for such factors for a long term Try to get restarted a couple of times Replace the SPM Replace the outdoor unit PCB R...

Page 217: ...tion halt due to unspecified internal and or external voltages Operation halt due to mismatching of indoor and outdoor units Supposed Causes Operation halt due to the anti icing function in other rooms Wrong connections at the indoor unit PCB wrongly connected Troubleshooting Check the model name The freeze protection function is activated in other rooms Refer to A5 Correct Reconnect R3066 Caution...

Page 218: ...he continuity of the switch connection The shutter can be opened and closed with hand Keep the shutter open and closed all the way for each continuity check steps 7 6 5 4 3 2 1 Motor power supply voltage Unused Unused P 0V reference potential Motor control voltage 15 VDC Rotation command voltage 1 5 VDC Rotation pulse input Upper fan connector 8 7 6 5 4 3 2 1 Motor power supply voltage Unused Unus...

Page 219: ...he no operation unit Flow noise of refrigerant in the no operation unit Operation halt due to icing protection Heating The unit does not heat Refrigerant flow rate vary by unit Discharge air temperatures are different by room Peak cut Reset power supply and conduct cooling operation unit by unit 2 Valve body catches at complete close position Symptom Cooling The only unit having problem does not c...

Page 220: ...it PCB Replace the four way valve coil Replace the four way valve R2856 NO Four way valve coil Cooling dry No continuity Heating Continuity YES YES Four way valve coil resistance at 1500 ohms NO S80 voltage at DC 180 220 V with compressor on Fig 1 Disconnect the four way valve coil from the connector and check the continuity Fig 1 Voltage at S80 DC180 220V ON Compressor Time ...

Page 221: ...s on the PCB and measure the resistance of each thermistor using tester The relationship between normal temperature and resistance is shown in the graph and the table below Thermistor R25 C 20kΩ B 3950 Temperature C 20 211 0 kΩ 15 150 10 116 5 5 88 0 67 2 5 51 9 10 40 15 31 8 20 25 25 20 30 16 35 13 40 10 6 45 8 7 50 7 2 ...

Page 222: ...er Change the installation location or direction Check the outside air temperature temperature of air taken in by the outdoor unit The outside air temperature shall be 43 C or lower Check the allowable dimensions of the air suction and discharge area Is the air flow blocked by obstacles or winds blowing in the opposite direction R1438 Abnormal YES YES YES Does the discharged air from other outdoor...

Page 223: ... valve Replace the pipe installed at the site Clean Replace the compressor R1443 YES YES YES NO NO NO NO At the heat exchanger and air filter dirty Is the stop valve open Is the connection pipe deformed YES High Check the outdoor unit fan system Reconnect R2857 Outdoor unit fan running YES Fan motor lead wire connector disconnected YES NO NO Outdoor unit fan system functioning Go to Check No 15 ...

Page 224: ...eform disturbance near the zero cross sections circled in Fig 2 6 1 10 Inverter Units Refrigerant System Check Check No 11 Fig 1 Fig 2 Refrigerant system check Check for gas leaks See the section on insufficient gas detection Conduct the check after operating the equipment for a sufficient length of time Correct the problem Conduct vacuum drying Replace the refrigerant Is the discharge thermister ...

Page 225: ...e the power transistor s supply voltage is below 50 V using the tester z For the UVW make measurements at the Faston terminal on the board or the relay connector Fan motor lead wire Solenoid valve coil lead wire Room A Solenoid valve coil lead wire Room B Solenoid valve coil lead wire Room C Solenoid valve lead wire Thermistor lead wire liquid pipe Thermistor lead wire gas pipe Thermistor lead wir...

Page 226: ...s being applied 1 Stop the operation first and then the power and disconnect the connector S70 2 Make sure there is about DC 270 V between pins 4 and 7 3 With the system and the power still off reconnect the connector S70 4 Make a turn of the fan motor with a hand and make sure the pulse 0 15 V appears twice at pins 1 and 4 If the fuse is blown out the outdoor unit fan may also be in trouble Check...

Page 227: ...Check Si12 308 216 Service Diagnosis ...

Page 228: ...emoval of Sound Insulation and Reactor 235 1 8 Removal of Shunt 237 1 9 Removal of Solenoid Valve and Four Way Valve 238 1 10 Removal of Compressor 240 2 Outdoor Unit 52 58 68 75 Class 242 2 1 Removal of Outer Panels 242 2 2 Removal of Electrical BOX 243 2 3 Removal of PCB 247 2 4 Removal of Fan Motor 250 2 5 Removal of Sound Insulation 251 2 6 Removal of Four Way Valve Coil Solenoid Valve Coil El...

Page 229: ...90 Class 1 1 Removal of Outer Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 External appearance Remove the piping in the backward direction 2 Remove 11 screws of the top panel ...

Page 230: ...19 3 Unscrew 3 screws of the right panel slide it downwards and release the tabs to remove 4 The figure shows the view of piping connections 5 Unscrew 1 screw of the front right panel slide it downwards and release the tabs to remove Step Procedure Points ...

Page 231: ...ss Si12 308 220 Removal Procedure 6 Unscrew 3 screws of the front panel to remove 7 Remove 4 screws of the discharge outlet grill 8 Slide the discharge outlet grill upwards and release 6 tabs to remove Step Procedure Points ...

Page 232: ...fter turning off all power supplies before disassembling work Step Procedure Points Remove the discharge outlet grill 1 To take off propeller fan remove the washer fitted nut M8 2 Remove the propeller fan For reassembling align mark of propeller fan with D cut section of motor shaft Mount the propeller fan while positioning mark to the top ...

Page 233: ...such as top and front panels Match the colors of the tie wires to A B C and D ports as follows 1 Black Power 2 White Power 3 Red Transmission Wires are fixed to the terminal board with screws 1 The figure shows the right side view 1 Remove the tie wire 1 Loosen the terminal board screws and remove the wires at A and B ports 2 Open the terminal board cover and remove the wires at C and D ports When...

Page 234: ...earth wire 4 Remove 1 screw of the terminal board 5 Release the tab on the top right of the terminal board 6 Pull out the terminal board and open it Glass tube fuse and varistor cannot be replaced individually because lead free soldering is provided Step Procedure Points ...

Page 235: ...ion valve lead wires When reconnecting make sure to match the wire to the correct connector 2 Remove the four way valve connector S80 3 Remove the connector S93 for liquid pipe thermistor Step Procedure Points Connector Electronic expansion valve No Harness length S20 White EVA 630 S21 Red EVB 730 S22 Blue EVC 825 S23 Yellow EVD 940 ...

Page 236: ...he connector S92 for gas pipe thermistor 5 Remove the connector S90 for thermistor Outdoor air thermistor Blue Discharge pipe thermistor Black Heat exchanger thermistor Gray 6 Remove the overload relay connector S40 7 Remove the reactor lead wire Step Procedure Points ...

Page 237: ...90 Class Si12 308 226 Removal Procedure 8 Remove the relay connector for compressor 9 Remove the electrical box cover 10 Disconnect the fan motor connector 11 Remove the discharge pipe thermistor Step Procedure Points ...

Page 238: ...hermistor so that its end comes up to the end of the presser spring Be careful not to lose the presser spring for the discharge pipe thermistor 3 Removing the electrical box 1 Remove 2 screws of the electrical box 2 Turn the electrical box up side down halfway and disconnect the thermistor lead wire from the hook Step Procedure Points ...

Page 239: ...or Unit 80 90 Class Si12 308 228 Removal Procedure 3 Remove the outdoor air thermistor lead wire from the groove 4 Remove each wire harness and dismount the electrical box by lifting it Step Procedure Points ...

Page 240: ... 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Removing the controller PCB 1 Release the tab of the electrical box and open the terminal board 2 Disconnect each connector of the terminal board 3 Unscrew 1 screw and release two tabs to remove the PCB ...

Page 241: ...Outdoor Unit 80 90 Class Si12 308 230 Removal Procedure 4 Lift the PCB at the terminal board side 5 Disconnect each wire harness connector linked to the inverter PCB Step Procedure Points ...

Page 242: ...ic expansion valve coil D port S31 To CN14 Pin 9 S32 To CN11 Pin 5 S33 To S34 Pin 10 S40 Overload relay S71 To S72 Pin 8 S80 Four way valve coil S90 Thermistor Outdoor air heat exchanger and discharge pipe S92 Gas pipe thermistor S93 Liquid pipe thermistor 2 Removing the service monitor PCB 1 Remove the service monitor PCB by releasing its tab 3 Removing the inverter PCB 1 Remove the 9 screws of t...

Page 243: ...g off all power supplies before disassembling work Step Procedure Points Remove the outer panels 1 Remove the fan motor lead wire connector S70 2 Remove the propeller fans For reassembling align mark of propeller fan with D cut section of motor shaft Mount the fan motor so as to position Q mark on the top 3 Remove 2 screws of the fan motor mount ...

Page 244: ... 90 Class Removal Procedure 233 4 Remove 4 screws of the fan motor When reassembling fix the lead wire to avoid contact with the propeller fan 5 Cut the wrapper fixing the lead wire 6 Remove the fan motor Step Procedure Points ...

Page 245: ...he thermistor so that its end comes up to the end of the presser spring Be careful not to lose the presser spring for the discharge pipe thermistor 2 Take off the putty and remove each thermistor S90 Outdoor air thermistor Blue Heat exchanger thermistor Gray Discharge pipe thermistor Black S92 Gas pipe thermistor Room A Black Room B Gray Room C Brown Room D Red S93 Liquid pipe thermistor Room A Bl...

Page 246: ...pplies before disassembling work Step Procedure Points 1 Release the clip fixing the compressor lead wire 2 Remove 2 screws of the partition board and move the board leftward The partition board is not removable as it is fixed with the fitting screw in the rear bottom 3 Remove the noise insulation outer Carefully remove the noise insulation which is easily torn in the piping section ...

Page 247: ... 308 236 Removal Procedure 4 Remove the noise insulation top Carefully remove the noise insulation which is easily torn in the piping section 5 Remove the noise insulation inner 6 Remove 1 screw of the reactor Step Procedure Points ...

Page 248: ...sten the rubber packing with double faced adhesive tape when mounting 3 Remove the putty Caution Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas welding rod Warning If refrigerant gas leaks during the job ventilate the room Bear in mind that if the refrigerant gas is exposed to open flames noxious gas may be generated Before taking this procedure make...

Page 249: ...noid valve 1 Remove 1 screw of the solenoid valve coil Before taking this procedure make sure there is no refrigerant gas left in the refrigerant pipes 2 Disconnect the 2 brazed points a and b in this order Warning If refrigerant gas leaks during the job ventilate the room Bear in mind that if the refrigerant gas is exposed to open flames noxious gas may be generated 2 Removing the four way valve ...

Page 250: ...the pipes be careful not to over tighten them with pliers The pipes may get deformed If the gas welding machine fails to remove the four way valve take the steps below 1 Disconnect the brazed pipe sections that are readily easy to separate and join together later 2 With a small copper tube cutter cut off the internal pipes to easily take out the four way valve Note Never use a hack saw The sawdust...

Page 251: ... off all power supplies before disassembling work Step Procedure Points 1 Remove the terminal cover Be careful to avoid burning the compressor terminals or the nameplate 2 Remove the overload relay 3 Disconnect the flag shape terminal As precaution keep the contents in memorandum 4 There is one nut fixing the compressor Remove the nut with a spanner ...

Page 252: ...s during the job ventilate the room Bear in mind that if the refrigerant gas is exposed to open flames noxious gas may be generated Caution Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas welding rod When heating up the brazed parts make sure to carry out the N2 replacement 5 Remove the 2 sheets of putty 6 Disconnect the brazed part a at discharge sid...

Page 253: ...anels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 External appearance 2 Remove 4 screws of the top panel and 6 screws of the front panel 3 Remove 4 screws of the discharge outlet grill 4 Remove 2 screws of the piping cover ...

Page 254: ...ling work Step Procedure Points 1 Removing the tie wires Remove the piping in the backward direction 1 The figure shows the tie pipe connections 2 Remove the terminal board fitting screw Match the colours of the tie wires to A B C and D ports as follows 1 Black Power 2 White Power 3 Red Transmission Wires are fixed to the terminal board with screws Terminal board is made of integral moulded resin ...

Page 255: ...the correct connector 1 Disconnect 4 connectors of the electronic expansion valve lead wires 2 Remove the four way valve connector S80 3 Disconnect the thermistor connector and the overload relay connector S40 Overload relay S90 Thermistor Outdoor air heat exchanger discharge pipe S92 Gas pipe thermistor S93 Liquid pipe thermistor Step Procedure Points Connector Electronic expansion valve No Harne...

Page 256: ...Procedure 245 4 Disconnect the compressor relay connector 5 Remove the reactor lead wire 3 Removing the wiring fixture 1 Remove 6 screws of the wiring fixture 4 Removing the electrical box 1 Remove 1 screw of the electrical box Step Procedure Points ...

Page 257: ...58 68 75 Class Si12 308 246 Removal Procedure 2 Remove 1 screw of the electrical box 3 Remove the drip proof cover 4 Disconnect the fan motor lead wire 5 Lift up the electrical box and dismount it Step Procedure Points ...

Page 258: ...supplies before disassembling work Step Procedure Points 1 Removing the controller PCB 1 Remove 1 screw of the PCB and release two tabs 2 Release the tabs of the terminal board and open the terminal board 3 Disconnect each connector on the back of the terminal board 4 Disconnect the service monitor PCB connector Release the tab to remove the service monitor PCB ...

Page 259: ...5 Class Si12 308 248 Removal Procedure 5 Lift up the control PCB 6 Disconnect each wire harness connector linked to the control PCB S31 Pin 9 To CN14 S32 Pin 5 To CN11 S33 Pin 10 To S34 S71 Pin 8 To S72 Step Procedure Points ...

Page 260: ...moval Procedure 249 7 The figure shows the control PCB Glass tube fuse 3A 2 Removing the service monitor PCB 1 The figure shows the service monitor PCB 3 Removing the inverter PCB 1 Remove the 7 screws of the inverter PCB Step Procedure Points ...

Page 261: ...wire connector For reassembling align mark of propeller fan with D cut section of motor shaft Mount the propeller fan while positioning Q mark to the top 1 Remove the propeller fan by removing the washer fitted nut 2 Remove the fan motor Remove 1 screw of the fan motor mount When reassembling fix the lead wire to avoid contact with the propeller fan 3 Disconnect the lead wire by releasing the 2 cl...

Page 262: ...n Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove 5 screws of the right side panel 2 Remove 2 screws of the partition board and remove the board 3 Remove the noise insulation top outer and inner ...

Page 263: ...er supplies before disassembling work Step Procedure Points 1 Remove 1 screw of the four way valve coil 2 Remove one screw of the solenoid valve coil 3 Remove the electronic expansion valve coil for each room Place the thermistor so that its end comes up to the end of the presser spring 4 Release the thermistor presser spring and remove the discharge pipe thermistor Be careful not to lose the pres...

Page 264: ...ser spring Be careful not to lose the presser spring for the discharge pipe thermistor 6 Remove the wire harness S90 Outdoor air thermistor Blue Heat exchanger thermistor Gray Discharge pipe thermistor Black S92 Gas pipe thermistor Room A Black Room B Gray Room C Brown Room D Red S93 Liquid pipe thermistor Room A Black Room B Gray Room C Yellow Room D Blue Step Procedure Points ...

Page 265: ...C In pulling the pipes be careful not to over tighten them with pliers The pipes may get deformed If the gas welding machine fails to remove the four way valve take the steps below 1 Disconnect the brazed pipe sections that are readily easy to separate and join together later 2 With a small copper tube cutter cut off the internal pipes to easily take out the four way valve Note Never use a hack sa...

Page 266: ...ful not to get yourself burnt with the pipes and other parts that are heated by the gas welding rod Warning If refrigerant gas leaks during the job ventilate the room Bear in mind that if the refrigerant gas is exposed to open flames noxious gas may be generated Reassembling precautions Wrap the solenoid valve body with wet cloth Splash water over the cloth before it is dried to prevent the valve ...

Page 267: ...d spanner Make sure there is no refrigerant gas left inside the refrigerant pipes before starting the job When heating up the brazed parts make sure to carry out the N2 replacement Warning The compressor s refrigerating machine oil may catch fire Have wet cloth at hand for quickly putting out the fire Warning If refrigerant gas leaks during the job ventilate the room Bear in mind that if the refri...

Page 268: ...Si12 308 Others 257 Part 8 Part 8 Part 8 Part 8 Others Others Others Others 1 Others 258 1 1 Test Run from the Remote Controller 258 1 2 Jumper Settings 259 ...

Page 269: ... Trial operation from Remote Controller 1 Press ON OFF button to turn on the system 2 Simultaneously press center of TEMP button and MODE buttons 3 Press MODE button twice T will appear on the display to indicate that Trial Operation mode is selected 4 Trial run mode terminates in approx 15 minutes and switches into normal mode To quit a trial operation press ON OFF button After trial operation is...

Page 270: ... box Cut the jumper JA on PCB Wireless remote controller in case of wall mounted type Cut the jumper J4 1 2 2 Jumper Setting Wireless remote controller Address J4 CUT EXIST 1 2 JA ADDRESS J4 ADDRESS CUT EXIST 1 2 JA JB JC Metallic cover Sensor parts cover PCB Electric parts box Claws 4 points R2587 Jumper On indoor PCB Function When connected factory set When cut JC Power failure recovery function...

Page 271: ...f center Gently push and slide the sensor to adjust the angle Aim so that the sensor is pointing to the center of the room or to the part of the room that is most frequently used After adjusting the angle gently wipe the sensor with a clean cloth being careful not to scratch the sensor Caution Do not hit or violently push the Intelligent eye sensor This can lead to damage and malfunction Do not pl...

Page 272: ...8 Appendix 261 Part 9 Part 9 Part 9 Part 9 Appendix Appendix Appendix Appendix 1 Piping Diagrams 262 1 1 Indoor Units 262 1 2 Outdoor Units 268 2 Wiring Diagrams 275 2 1 Indoor Units 275 2 2 Outdoor Units 280 ...

Page 273: ... CuT 6 4CuT 7 9CuT CROSS FLOW FAN ON HEAT EXCH THERMISTOR INDOOR UNIT M FAN MOTOR 6 4CuT 7 0CuT 9 5CuT HEAT EXCHANGER REFRIGERANT FLOW HEATING COOLING 6 4CuT 6 4CuT FTXE35 FTXE25 C 4D032969A 12 7 9 5 FIELD PIPING FIELD PIPING 6 4CuT 9 5CuT 7 9CuT CROSS FLOW FAN REFRIGERANT FLOW FAN MOTOR ON HEAT EXCH THERMISTOR M INDOOR UNIT HEATING COOLING 7 0CuT 6 4CuT 9 5CuT HEAT EXCHANGER 6 4CuT 6 4CuT 4D03369...

Page 274: ...S71BVMB FIELD PIPING FIELD PIPING 12 7CuT 6 4CuT CROSS FLOW FAN FAN MOTOR 7 9CuT INDOOR UNIT 12 7CuT M REFRIGERANT FLOW ON HEAT EXCH THERMISTOR HEATING COOLING 4D040081A HEAT EXCHANGER FIELD PIPING FIELD PIPING 15 9CuT 6 4CuT CROSS FLOW FAN FAN MOTOR 7 9CuT INDOOR UNIT 12 7CuT M REFRIGERANT FLOW ON HEAT EXCH THERMISTOR HEATING COOLING 4D040082 HEAT EXCHANGER ...

Page 275: ...NG FIELD PIPING 9 5CuT CROSS FLOW FAN FAN MOTOR 7 9CuT INDOOR UNIT 12 7CuT M HEAT EXCHANGER ON HEAT EXCH THERMISTOR REFRIGERANT FLOW COOLING HEATING 4D040083A FIELD PIPING FIELD PIPING CuT 6 4CuT INDOOR UNIT 6 4CuT SIROCCO FAN CuT M FAN MOTOR REFRIGERANT FLOW HEAT EXCHANGER HEATING COOLING THERMISTOR ON HEAT EXCH CDX50 CDX25 CDX35 CDK50 CDK35 CDK25 CDX60 CDK60 12 7 15 9 9 5 4D032968 12 7 15 9 9 5 ...

Page 276: ...NGER HEATING COOLING THERMISTOR ON HEAT EXCH CDKS35BVMB CDXS35BVMB CDKS25BVMB CDXS25BVMB 9 5 9 5 CDKS60BVMB CDXS60BVMB CDKS50BVMB CDXS50BVMB 12 7 12 7 C 4D033699A FIELD PIPING FIELD PIPING 6 4CuT 9 5CuT REFRIGERANT FLOW SINGLE UNION JOINT SINGLE UNION JOINT INDOOR UNIT 7 9CuT CROSS FLOW FAN CROSS FLOW FAN COOLING HEATING FAN MOTOR FAN MOTOR 9 5CuT M M HEAT EXCHANGER 7 0CuT 7 0CuT ON HEAT EXCH THER...

Page 277: ...FAN CROSS FLOW FAN HEATING COOLING FAN MOTOR FAN MOTOR 9 5CuT M M 4 8CuT 4 8CuT 7 0CuT HEAT EXCHANGER 7 0CuT 7 0CuT 7 0CuT ON HEAT EXCH THERMISTOR 4D020911B FIELD PIPING FIELD PIPING 6 4CuT CuT INDOOR UNIT SIROCCO FAN REFRIGERANT FLOW FAN MOTOR CuT M CuT HEATING COOLING HEAT EXCHANGER THERMISTOR ON HEAT EXCH FLX25 35 FLK25 35 FLXS25 35 FLKS25 35 FLX50 60 FLK50 60 FLXS50 60 FLKS50 60 12 7 9 5 12 7 ...

Page 278: ...FIELD PIPING FIELD PIPING CuT 6 4CuT INDOOR UNIT SIROCCO FAN CuT REFRIGERANT FLOW CuT M FAN MOTOR COOLING HEATING HEAT EXCHANGER THERMISTOR ON HEAT EXCH FLX35 FLK35 FLX50 FLK50 FLK25 FLK60 FLX25 FLX60 12 7 12 7 15 9 9 5 4D034013 12 7 12 7 9 5 9 5 9 5 6 4 6 4 9 5 ...

Page 279: ...CuT 12 7 CuT 3D036222A ROOM B ROOM A ROOM B ROOM A GAS FIELD FIELD PIPING PIPING LIQUID REFRIGERANT FLOW 9 5CuT HEAT EXCHANGER THERMISTOR DE OUTDOOR UNIT COOLING 7 9CuT PROPELLER FAN DC FAN MOTOR HEAT EXCHANGER DISCHARGE PIPE THERMISTOR DO COMPRESSOR M OUTDOOR TEMPERATURE THERMISTOR DOA CAPILLARY TUBE ACCUMULATOR 12 7CuT DISTRIBUTOR ACCUMULATOR 9 5CuT 12 7CuT FILTER STOP VALVE LIQUID LINE STOP VAL...

Page 280: ... ROOM A ROOM B ROOM C ROOM B ROOM C ROOM A 3D036220A GAS FIELD FIELD PIPING LIQUID PIPING REFRIGERANT FLOW 9 5CuT HEAT EXCHANGER THERMISTOR DE OUTDOOR UNIT COOLING 7 9CuT PROPELLER FAN DC FAN MOTOR HEAT EXCHANGER DISCHARGE PIPE THERMISTOR DO COMPRESSOR M OUTDOOR TEMPERATURE THERMISTOR DOA CAPILLARY TUBE ACCUMULATOR 12 7CuT DISTRIBUTOR ACCUMULATOR 9 5CuT 12 7CuT FILTER STOP VALVE LIQUID LINE STOP V...

Page 281: ...CuT OUTDOOR UNIT HEAT EXCHANGER THERMISTOR DE COOLING HEATING 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT PROPELLER FAN DC FAN MOTOR DISCHARGE PIPE THERMISTOR DO COMPRESSOR HEAT EXCHANGER 12 7CuT MUFFLER M 7 9CuT 7 9CuT ACCUMULATOR 7 9CuT VALVE 4 WAY OUTDOOR TEMPERATURE THERMISTOR DOA CAPILLARY TUBE 12 7CuT 12 7CuT 12 7CuT DISTRIBUTOR 9 5CuT 7 9CuT 4MX80AZVMB 4MXS80BVMB ACCUMULATOR 12 ...

Page 282: ...LD PIPING LIQUID PIPING FILTER FILTER EVA FVB EVC REFRIGERANT FLOW 9 5CuT HEAT EXCHANGER THERMISTOR DE OUTDOOR UNIT COOLING 7 9CuT PROPELLER FAN DC FAN MOTOR HEAT EXCHANGER DISCHARGE PIPE THERMISTOR DO COMPRESSOR M OUTDOOR TEMPARATURE THERMISTOR DOA CAPILLARY TUBE ACCUMULATOR 12 7CuT DISTRIBUTOR ACCUMULATOR 9 5CuT 12 7CuT FILTER STOP VALVE LIQUID LINE STOP VALVE GAS LINE HEADER HEADER MOTOR OPERAT...

Page 283: ... ROOM C ROOM B ROOM A ROOM D ROOM C ROOM B ROOM A 3D034513A GAS FIELD FIELD PIPING PIPING LIQUID REFRIGERANT FLOW 9 5CuT OUTDOOR UNIT HEAT EXCHANGER THERMISTOR DE COOLING 7 9CuT 7 9CuT 7 9CuT 7 9CuT PROPELLER FAN 7 9CuT DC FAN MOTOR DISCHARGE PIPE THERMISTOR DO COMPRESSOR HEAT EXCHANGER M ACCUMULATOR 7 9CuT OUTDOOR TEMPERATURE THERMISTOR DOA CAPILLARY TUBE 12 7CuT DISTRIBUTOR 9 5CuT ACCUMULATOR 7 ...

Page 284: ...OOM A ROOM B ROOM C 3D034512A GAS FIELD FIELD PIPING LIQUID PIPING REFRIGERANT FLOW HEADER HEAT EXCHANGER THERMISTOR DE OUTDOOR UNIT HEATING COOLING 12 7CuT PROPELLER FAN DC FAN MOTOR HEAT EXCHANGER DISCHARGE PIPE THERMISTOR DO COMPRESSOR M VALVE REVERSING SOLENOID MUFFLER 7 9CuT OUTDOOR TEMPARATURE THERMISTOR DOA 12 7CuT CAPILLARY TUBE ACCUMULATOR 12 7CuT 12 7CuT DISTRIBUTOR 6 4CuT 9 5CuT SV ACCU...

Page 285: ...OR 7 9CuT 12 7CuT 12 7CuT STOP VALVE LIQUID LINE STOP VALVE 9 5CuT GAS LINE 9 5CuT 12 7CuT HEADER HEADER FILTER 7 9CuT 7 9CuT 7 9CuT 7 9CuT MOTOR OPERATED VALVE MOTOR OPERATED VALVE MOTOR OPERATED VALVE MOTOR OPERATED VALVE 12 7CuT 12 7CuT 12 7CuT 12 7CuT EV EV EV EV GAS PIPE THERMISTOR DGA GAS PIPE THERMISTOR DGB GAS PIPE THERMISTOR DGC GAS PIPE THERMISTOR DGD B A C D FILTER FILTER FILTER FILTER ...

Page 286: ...HT RED BLK YLW X1M 2 3 1 NOTE THAT OPERATION WILL THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK RESTART AUTOMATICALLY IF ON AGAIN CAUTION FIELD WIRING 2 3 1 3D033599A outdoor LED1 EYE SENSOR PCB2 PCB3 INTELLIGENT H1P RECEIVER SIGNAL CONTROLLER LED2 H2P S1W WIRELESS REMOTE LED3 H3P R1T S27 t S36 S35 S26 S32 R2T t S21 PCB1 FU C70 TERMINAL FOR CENTRALIZED CONTROL S6 M M1S S7 indoor FUSE RUNNING C...

Page 287: ...X1M 2 3 1 THE MAIN POWER SUPPLY IS ON AGAIN TURNED OFF AND THEN BACK NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF FIELD WIRING CAUTION 3 2 1 OUTDOOR 3D038530C CONTROLLER WIRELESS REMOTE PCB4 PCB3 PCB5 INTELLIGENT EYE LED1 H1P R1T SENSOR S37 t S38 LED2 H2P LED3 H3P PCB2 S27 S36 S1W RECEIVER SIGNAL S26 S35 S21 S29 S28 PCB1 R2T S32 t RECTIFIER 1 RED M1S M S6 ORG YLW PNK 5 BLU 1 TRANSMISSION BRN ...

Page 288: ...Si12 308 Wiring Diagrams Appendix 277 FTXD50BVMC FTXD60 71BVMC ...

Page 289: ...1M CONNECTOR 2 3 1 NOTE THAT OPERATION WILL THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK RESTART AUTOMATICALLY IF ON AGAIN CAUTION FIELD WIRING 2 3 1 outdoor 3D033598A RECEIVER SIGNAL LED PCB2 H1P CONTROLLER LED H2P REMOTE WIRELESS S1W LED H3P R1T RTH1 t S1 S26 S32 R2T FU C70 t S21 PCB1 TERMINAL FOR CENTRALIZED CONTROL indoor FUSE S7 PROTECTIVE EARTH RUNNING CAPACITOR X11A S1 1 M C70 130 C M1...

Page 290: ...ON AGAIN S1W OPERATION SWITCH SW7 S6 S37 X11A X21A CONNECTOR PCB1 PCB4 PRINTED CIRCUIT BOARD R1T R2T THERMISTOR X1M TERMINAL STRIP CAUTION FIELD WIRING 2 3 1 3D033909B outdoor CONTROLLER WIRELESS REMOTE indoor H1P S1W S2W 4 S4W M2S H2P M1S PCB4 PCB3 H3P RECEIVER SIGNAL M M L1S S24 S42 S26 S41 S23 S25 S6 PCB2 S31 R1T S21 TRANSMISSION S32 R2T CIRCUIT HA 3 15A FU S7 S302 S203 S201 S301 H3 H2 H1 S44 S...

Page 291: ...LW BRN BLU RED 1 GRY S40 V 1 M1F M1C 3 M BLK M 4 W U Q1L BLK 9 N N L TO INDOOR UNIT 60Hz 220 230V 50Hz 220 240V POWER SUPPLY ROOM A ROOM B ROOM C FIELD WIRING 3 3 3 2 2 2 1 1 1 V2 V5 VARISTOR MRC W MAGNETIC RELAY E AC1 AC2 HE HL HN L2 CONNECTOR S2 S102 CN11 CN14 CONNECTOR MRB MRD H1 H2 L1 Z1C Z3C FERRITE CORE X1M X4M TERMINAL STRIP R1T R12T THERMISTOR H1P H5P PILOT LAMP Y1E Y3E ELECTRONIC EXPANSIO...

Page 292: ...U BRN RED BLU YLW 1 X11A 10 10 BLU S93 YLW BRN BLU RED 3D034317C 1 GRY S40 V 1 M1F M1C 3 M BLK M 4 W U Q1L BLK 9 N 60Hz 220 230V 50Hz 220 240V ROOM A ROOM B ROOM C ROOM D TO INDOOR UNIT 3 3 3 3 2 2 2 2 POWER SUPPLY 1 1 1 1 FIELD WIRING V2 V5 VARISTOR MRC W MAGNETIC RELAY MID1 MID2 MOLDED INTER CONNECT DEVICE MRB MRD S2 S102 CONNECTOR E AC1 AC2 HE HL HN L2 CONNECTOR Y1E Y4E ELECTRONIC EXPANSION VAL...

Page 293: ... GRY V ROOM D S40 t R7T 1 3 M1F BLU M1C M M BLK 4 W U t Q1L BLK 9 N N NEUTRAL S3W WIRING ERROR CHECK SW SW3 PCB PRINTED CIRCUIT BOARD L1R REACTOR 60Hz 220 230V 50Hz 220 240V ROOM C ROOM B ROOM A TO INDOOR UNIT 3 3 3 2 2 2 POWER SUPPLY 1 1 1 FIELD WIRING V2 V5 VARISTOR MRC W MAGNETIC RELAY MRB MRD S2 S102 CONNECTOR E AC1 AC2 HE HL HN L2 CONNECTOR Y1E Y3E ELECTRONIC EXPANSION VALVE COIL R1T R12T THE...

Page 294: ...GRY ROOM C S93 t YLW BRN BLU RED R6T 1 YLW GRY V ROOM D S40 t R7T 1 3 M1F BLU M1C M M BLK 4 W U t Q1L BLK 9 N ROOM D ROOM C ROOM B ROOM A 60Hz 220 230V 50Hz 220 240V V2 V5 ROOM A ROOM B ROOM C MRC W TO INDOOR UNIT MRB MRD S2 S102 E AC1 AC2 HE HL HN L2 Y1E Y3E R1T R12T H1P H5P Z1C Z3C MRM10 MRM20 X1M X4M H1 H2 L1 3 3 3 2 2 2 POWER SUPPLY 1 1 1 FIELD WIRING FU1 FU2 FU201 X3M X4M X2M X1M L 3 3 3 2 2 ...

Page 295: ...T SW SW2 DIODE BRIDGE WIRING ERROR CHECK SW SW3 NIGHT QUIET MODE SETTING SW SW5 PRINTED CIRCUIT BOARD PRIORITY ROOM SETTING SW SW4 Y1S RED MRC W Y1R BLK S80 CT1 RED 9 BLK H2 H1 S91 1 WHT YLW BLU t YLW Y1E R12T 1 M S20 A ORG BLK Z2C BLU BLK 3 BRN 6 RED 1 WHT DB1 1 BLK YLW Y2E BLK M S21 B ORG GRY BLK BLK BRN GRN BLU BLU SPM CT1 MID1 MID2 BLK RED PCB BLK BRN 5 6 BLK RED S32 1 CN11 ORG YLW WHT RED WHT...

Page 296: ...3 discharge pressure check 212 display PCB 66 68 69 71 E E5 184 E6 185 E7 186 E8 187 EA 189 electrical box 222 243 electrical box temperature rise 197 electronic expansion valve 234 electronic expansion valve check 208 electronic expansion valve coil 252 electronic expansion valve control 100 error codes and description of fault 170 F F3 191 fan control 98 fan motor 232 250 fan motor DC motor or r...

Page 297: ...door air thermistor 253 outdoor heat exchanger thermistor 88 90 outdoor unit fan system check with DC motor 212 outdoor unit silent operation 140 outer panels 218 242 output over current detection 201 over current 105 overload 105 overload relay 244 P P4 195 PCB 229 247 photocatalytic deodorizing filter 85 PI control 94 piping diagrams 262 position sensor abnormality 192 power failure recovery fun...

Page 298: ...on 235 251 specifications 20 SW1 65 67 69 SW2 67 SW7 62 T target discharge pipe temperature control 103 test run from the remote controller 258 thermistor 231 234 244 252 thermistor or related abnormality indoor unit 178 thermistor or related abnormality outdoor unit 195 thermistor resistance check 210 timer operation 147 troubleshooting indoor units 171 outdoor units 172 troubleshooting with the ...

Page 299: ...Si12 308 iv Index ...

Page 300: ...del 90 heat pump model 88 H heating peak cut control 97 home leave operation 83 I indoor unit PCB abnormality 173 input current control 96 input over current detection 187 installation condition check 211 insufficient gas 203 insufficient gas control 105 intelligent eye 81 intelligent eye sensor PCB 66 inverter features 75 inverter powerful operation 84 inverter units refrigerant system check 213 ...

Page 301: ...ity outdoor unit 195 thermistor resistance check 210 troubleshooting with the LED indication 167 turning speed pulse input on the outdoor unit PCB check 215 U unspecified voltage between indoor and outdoor units 181 206 W wiring diagrams 275 wiring error check 107 ...

Page 302: ...23 Japan Tokyo office Shinjuku Sumitomo Bldg 6 1 Nishi Shinjuku 2 chome Shinjuku ku Tokyo 163 0235 Japan Zandvoordestraat 300 B 8400 Oostende Belgium z For further improvement specifications or designs are subject to change without prior notice Printed in Singapore 07 2003 AK COS ...