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Daikin FTKE25BVM, Service Manual

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Daikin FTKE25BVM Service Manual Download Page 183

Troubleshooting

Si12-411A

172

Service Diagnosis

5.4

Freeze-up Protection Control or High Pressure Control

Remote 
Controller 
Display

A5

Method of 
Malfunction 
Detection

„

High pressure control (heat pump model only)

During heating operations, the temperature detected by the indoor heat exchanger 
thermistor is used for the high pressure control (stop, outdoor fan stop, etc.) 

„

The freeze-up protection control (operation halt) is activated during cooling operation 
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 filter of the indoor unit.

„

Operation halt due to dust accumulation on the indoor unit heat exchanger.

„

Operation halt due to short-circuit.

„

Detection error due to faulty indoor unit heat exchanger thermistor.

„

Detection error due to faulty indoor unit PCB.

Summary of Contents for FTKE25BVM

Page 1: ...C Series Applied Models zInverter Multi Cooling Only zInverter Multi Heat Pump Si12 411A...

Page 2: ...4MKD90BVMA 4MKS58BVMB 8 3MKD75BVM 4MKS75BVMB 4MKD75BVM 4MKS90BVMB 4MKD90BVM zHeat Pump Indoor Unit FTXE25BVMA FTXS20CVMB 9 FLXS25BVMB FTXS25BVMA FTXE35BVMA FTXS25CVMB 9 8 FLXS35BVMB FTXS35BVMA FTXD50...

Page 3: ...Standing Type 66 1 6 Outdoor Units 69 Part 4 Function and Control 71 1 Main Functions 72 1 1 Frequency Principle 72 1 2 Power Airflow Dual Flaps Wide Angle Louvers and Auto Swing 74 1 3 Fan Speed Con...

Page 4: ...and Cleaning 149 2 14 Troubleshooting 159 Part 6 Service Diagnosis 163 1 Caution for Diagnosis 164 1 1 Troubleshooting with the Operation Lamp 164 2 Problem Symptoms and Measures 166 3 Service Check F...

Page 5: ...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...

Page 6: ...Si12 411A Table of Contents v Index i Drawings Flow Charts v...

Page 7: ...Si12 411A 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 equipme...

Page 9: ...e 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 appro...

Page 10: ...s 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 wor...

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...

Page 12: ...Si12 411A List of Functions 1 Part 1 List of Functions 1 List of Functions 2 1 1 Cooling Only Models 2 1 2 Heat Pump Models 8...

Page 13: ...eliability 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 Trea...

Page 14: ...lity 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...

Page 15: ...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 Excha...

Page 16: ...er 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 Cont...

Page 17: ...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 Outdo...

Page 18: ...Reliability 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 Tr...

Page 19: ...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...

Page 20: ...r 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 Con...

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 Outdo...

Page 22: ...lity Auto Restart 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 Outd...

Page 23: ...lure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow 3 Step Airflow H P Only Wiring Error Check Comfort Control Auto Fan Speed Anticorrosion Treatment of Outdoor He...

Page 24: ...Reliability Durability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display 3 Step Airflow H P Only Wiring Error Check Comfort Control Auto Fan Speed Anticorrosion Treatmen...

Page 25: ...o 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 Exc...

Page 26: ...er 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...

Page 27: ...rt 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...

Page 28: ...Si12 411A Specifications 17 Part 2 Specifications 1 Specifications 18 1 1 Indoor Units Cooling Only 18 1 2 Outdoor Units Cooling Only 30 1 3 Indoor Units Heat Pump 36 1 4 Outdoor Units Heat Pump 51...

Page 29: ...id and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm 6 4 6 4 Gas mm 9 5 12 7 Drain mm 18 0 18 0 Drawing No 3D040693 3D040694 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min...

Page 30: ...rd Air Filter Removable Washable Mildew Proof Running Current Rated A 0 23 0 22 0 21 0 23 0 22 Power Consumption Rated W 50 Power Factor 98 8 98 8 99 2 98 8 98 8 Temperature Control Microcomputer Cont...

Page 31: ...Gas Pipes Piping Connection Liquid mm 6 4 6 4 Gas mm 9 5 12 7 Drain mm 18 0 18 0 Drawing No 3D040697 3D040698 Model FTKD50BVMA FTKD60BVMA Rated Capacity 5 0kW Class 6 0kW Class Front Panel Color Whit...

Page 32: ...rd Air Filter Removable Washable Mildew Proof Running Current Rated A 0 23 0 22 0 21 0 23 0 22 Power Consumption Rated W 50 Power Factor 98 8 98 8 99 2 98 8 98 8 Temperature Control Microcomputer Cont...

Page 33: ...g Connection Liquid mm 6 4 6 4 Gas mm 9 5 9 5 Drain mm 18 0 18 0 Drawing No 3D044242B 3D044243B Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FTKS35CVMB 9 8 FTKS50BVMB Rated Cap...

Page 34: ...vable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 20 Power Consumption Rated W 40 45 Power Factor 96 6 96 4 Temperature Control Microcomputer Control Microcomp...

Page 35: ...M L SL dBA 35 33 31 29 35 33 31 29 External Static Pressure Pa 40 40 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm 6 4 6 4 Gas mm 9 5 12 7 Drain mm VP...

Page 36: ...35 33 31 29 35 33 31 29 External Static Pressure Pa 40 40 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm 6 4 6 4 Gas mm 9 5 12 7 Drain mm VP20 O D 26...

Page 37: ...29 35 33 31 29 External Static Pressure Pa 40 40 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm 6 4 6 4 Gas mm 9 5 9 5 Drain mm VP20 O D 26 I D 20 VP2...

Page 38: ...quid and Gas Pipes Piping Connection Liquid mm 6 4 6 4 Gas mm 9 5 12 7 Drain mm 18 0 18 0 Drawing No 3D036717 3D036718 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FLK50AVMA FL...

Page 39: ...Connection Liquid mm 6 4 6 4 Gas mm 9 5 9 5 Drain mm 18 0 18 0 Drawing No 3D040166A 3D040167A Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FLKS50BVMB FLKS60BVMB Rated Capacity...

Page 40: ...g 19 19 Operation Sound H M L SL dBA 38 32 26 23 39 33 27 24 Sound Power H dBA 54 55 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm 6 4 6 4 Gas mm 9 5...

Page 41: ...tarting Current A 6 9 6 5 Dimensions H W D mm 735 936 300 735 936 300 Packaged Dimensions H W D mm 784 960 357 784 960 357 Weight kg 55 55 Gross Weight kg 59 59 Operation Sound dBA 46 46 Piping Connec...

Page 42: ...imensions H W D mm 735 936 300 735 936 300 Packaged Dimensions H W D mm 784 960 357 784 960 357 Weight kg 58 58 Gross Weight kg 62 62 Operation Sound dBA 48 48 Piping Connection Liquid mm 6 4 1 9 5 2...

Page 43: ...0 34 Power Consumption W H 60 L 41 Starting Current A 12 1 Dimensions H W D mm 908 900 320 Packaged Dimensions H W D mm 942 926 394 Weight kg 66 Gross Weight kg 77 Operation Sound dBA 48 Piping Connec...

Page 44: ...Dimensions H W D mm 735 936 300 908 900 320 Packaged Dimensions H W D mm 784 960 357 942 926 394 Weight kg 58 66 Gross Weight kg 62 77 Operation Sound dBA 48 48 Piping Connection Liquid mm 6 4 1 9 5...

Page 45: ...D mm 735 936 300 735 936 300 Packaged Dimensions H W D mm 784 960 357 784 960 357 Weight kg 55 55 Gross Weight kg 59 59 Operation Sound dBA 46 46 Sound Power dBA 59 59 Piping Connection Liquid mm 6 4...

Page 46: ...6 300 908 900 320 Packaged Dimensions H W D mm 784 960 357 942 926 394 Weight kg 58 66 Gross Weight kg 62 77 Operation Sound dBA 48 48 Sound Power dBA 61 61 Piping Connection Liquid mm 6 4 4 6 4 4 Gas...

Page 47: ...and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm 6 4 6 4 Gas mm 9 5 12 7 Drain mm 18 0 18 0 Drawing No 3D040689 3D040690 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 3...

Page 48: ...Filter Removable 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 Power Factor 98 8 98 8 99 2 98 8 98 8 98 8 98 8 99 2 9...

Page 49: ...Connection Liquid mm 6 4 6 4 Gas mm 9 5 9 5 Drain mm 18 0 18 0 Drawing No 3D044245B 3D044246B Model FTXS35CVMB 9 8 FTXS50BVMB Cooling Heating Cooling Heating Rated Capacity 3 5kW Class 5 0kW Class Fr...

Page 50: ...Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 20 0 20 0 22 Power Consumption Rated W 40 45 45 50 Power Factor 96 6 97 8 96 4 97 6...

Page 51: ...g Connection Liquid mm 6 4 6 4 Gas mm 9 5 9 5 Drain mm 18 0 18 0 Drawing No 3D044251B 3D044252B Model ATXS35CVMB 9 ATXS50CVMB Cooling Heating Cooling Heating Rated Capacity 3 5kW Class 5 0kW Class Fro...

Page 52: ...n Liquid mm 6 4 6 4 Gas mm 9 5 9 5 Drain mm 18 0 18 0 Drawing No 3D046602 3D046603 Model FTXS50BVMA 8 FTXS60BVMA 8 Cooling Heating Cooling Heating Rated Capacity 5 0kW Class 6 0kW Class Front Panel Co...

Page 53: ...ontal Downward Air Filter Removable Washable Mildew Proof Running Current Rated A 0 21 0 21 Power Consumption Rated W 50 50 Power Factor 99 2 99 2 Temperature Control Microcomputer Control Dimensions...

Page 54: ...31 29 35 33 31 29 35 33 31 29 External Static Pressure Pa 40 40 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm 6 4 6 4 Gas mm 9 5 12 7 Drain mm VP20 O...

Page 55: ...35 33 31 29 External Static Pressure Pa 40 40 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm 6 4 6 4 Gas mm 9 5 9 5 Drain mm VP20 O D 26 I D 20 VP20 O...

Page 56: ...m 9 5 9 5 Drain mm VP20 O D 26 I D 20 VP20 O D 26 I D 20 Drawing No 3D046469 3D046470 Model CDXS50CVMA CDXS60CVMA Cooling Heating Cooling Heating Rated Capacity 5 0kW Class 6 0kW Class Front Panel Col...

Page 57: ...id and Gas Pipes Piping Connection Liquid mm 6 4 6 4 Gas mm 9 5 12 7 Drain mm 18 0 18 0 Drawing No 3D036690 3D036691 Conversion Formulae kcal h kW 860 Btu h kW 3414 cfm m min 35 3 Model FLX50AVMA FLX6...

Page 58: ...tion Liquid mm 6 4 6 4 Gas mm 9 5 9 5 Drain mm 18 0 18 0 Drawing No 3D040174A 3D040175A Model FLXS50BVMB FLXS60BVMB Cooling Heating Cooling Heating Rated Capacity 5 0kW Class 5 7kW Class Front Panel C...

Page 59: ...onnection Liquid mm 6 4 6 4 Gas mm 9 5 9 5 Drain mm 18 0 18 0 Drawing No 3D046600 3D046601 Model FLXS50BVMA FLXS60BVMA Cooling Heating Cooling Heating Rated Capacity 5 0kW Class 5 7kW Class Front Pane...

Page 60: ...s 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 Sound Power H dBA 54 55 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connec...

Page 61: ...Horizontal Upward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 14 0 14 0 26 0 32 Power Consumption Rated W 32 32 55 70 Power Factor 99 4 99 4 92...

Page 62: ...Current A 10 1 10 2 Dimensions H W D mm 735 936 300 908 900 320 Packaged Dimensions H W D mm 784 960 357 942 926 394 Weight kg 59 73 Gross Weight kg 63 80 Operation Sound dBA 48 49 48 49 Piping Conne...

Page 63: ...D mm 735 936 300 735 936 300 Packaged Dimensions H W D mm 784 960 357 784 960 357 Weight kg 55 59 Gross Weight kg 59 63 Operation Sound dBA 46 47 48 49 Sound Power dBA 59 60 61 62 Piping Connection Li...

Page 64: ...tarting Current A 8 7 Dimensions H W D mm 908 900 320 Packaged Dimensions H W D mm 942 926 394 Weight kg 73 Gross Weight kg 80 Operation Sound dBA 48 49 Sound Power dBA 61 62 Piping Connection Liquid...

Page 65: ...936 300 Packaged Dimension H W D mm 784 990 400 Weight kg 55 Gross Weight kg 59 Operation Sound Sound Pressure dBA 46 47 Silent Mode dBA Sound Power dBA 59 60 Piping Connection Liquid mm 6 4 3 Gas mm...

Page 66: ...W D mm 735 936 300 908 900 320 Packaged Dimensions H W D mm 784 960 357 1 025 926 388 Weight kg 59 73 Gross Weight kg 63 80 Operation Sound dBA 48 49 48 49 Sound Power dBA 61 62 61 62 Piping Connectio...

Page 67: ...Specifications Si12 411A 56 Specifications...

Page 68: ...t Board Connector Wiring Diagram 1 Printed Circuit Board Connector Wiring Diagram 58 1 1 Wall Mounted Type 20 25 35 Class 58 1 2 Wall Mounted Type 50 60 71 Class 61 1 3 Duct Connected Type 63 1 4 Floo...

Page 69: ...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 Addr...

Page 70: ...ctor Wiring Diagram Printed Circuit Board Connector Wiring Diagram 59 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...

Page 71: ...Printed Circuit Board Connector Wiring Diagram Si12 411A 60 Printed Circuit Board Connector Wiring Diagram PCB Detail...

Page 72: ...9 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...

Page 73: ...onnector 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 J...

Page 74: ...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 sp...

Page 75: ...control PCB 6 S26 Connector for signal receiver PCB 7 S31 Connector for room temperature thermistor 8 S32 Connector for heat exchanger thermistor 9 S37 Connector for power supply PCB 1 V1 Varistor 2 J...

Page 76: ...Si12 411A Printed Circuit Board Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 65 Power Supply PCB PCB 2 Display PCB PCB 3 Signal Receiver PCB PCB 4...

Page 77: ...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 JA Address setting jumper JB Fan...

Page 78: ...Si12 411A Printed Circuit Board Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 67 Power Supply PCB PCB 1...

Page 79: ...Printed Circuit Board Connector Wiring Diagram Si12 411A 68 Printed Circuit Board Connector Wiring Diagram Control PCB PCB 2 Display PCB PCB 3 Signal Receiver PCB PCB 4...

Page 80: ...S22 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 Conn...

Page 81: ...Printed Circuit Board Connector Wiring Diagram Si12 411A 70 Printed Circuit Board Connector Wiring Diagram...

Page 82: ...Function of Main Structural Parts 85 2 1 Main Structural Parts 85 2 2 Function of Thermistor 86 3 Control Specification 90 3 1 Mode Hierarchy 90 3 2 Frequency Control 91 3 3 Controls at Mode Changing...

Page 83: ...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...

Page 84: ...ir 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 p...

Page 85: ...mfortable 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...

Page 86: ...erates 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 Con...

Page 87: ...et 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...

Page 88: ...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 temperat...

Page 89: ...ht Set circuit continues heating or cooling the room at the set temperature for the first one hour then automatically raises the temperature setting slightly in the case of cooling or lowers it slight...

Page 90: ...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...

Page 91: ...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...

Page 92: ...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...

Page 93: ...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 tar...

Page 94: ...is button 1 10 4 Photocatalytic Deodorizing Filter Photocatalytic Deodorizing Filter demonstrates powerful oxidation characteristics when subjected to harmless ultraviolet light Photocatalytic deodori...

Page 95: ...lity 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 occu...

Page 96: ...wing 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 w...

Page 97: ...rge 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 contr...

Page 98: ...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...

Page 99: ...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...

Page 100: ...g 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...

Page 101: ...uring 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 follow...

Page 102: ...t 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 u...

Page 103: ...equency 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...

Page 104: ...ion 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...

Page 105: ...top 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...

Page 106: ...ec 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 operat...

Page 107: ...urned 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 Ope...

Page 108: ...inutes of accumulated time pass since the start of the operation or ending the defrosting Conditions for Canceling Defrost The target heat exchanger temperature as the canceling condition is selected...

Page 109: ...is fully closed 1 Electronic expansion valve is fully closed when turning on the power 2 Pressure equalizing control Room Distribution Control 1 Gas pipe isothermal control 2 SC control Only for Heat...

Page 110: ...e 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 contr...

Page 111: ...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 valv...

Page 112: ...mperature difference between the maximum heat exchanger temperature of connected room and the temperature of liquid pipe thermistor becomes constant 3 12 10 Disconnection of the Discharge Pipe Thermis...

Page 113: ...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 a...

Page 114: ...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 fr...

Page 115: ...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 zon...

Page 116: ...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...

Page 117: ...ced 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 st...

Page 118: ...om 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...

Page 119: ...ing to only heat H Short circuit pins 1 and 3 of the connector S15 Setting to only cool C short circuit pins 3 and 5 of the connector S15 The following specifications apply to the connector housing an...

Page 120: ...autions 112 2 3 Names of Parts 114 2 4 Preparation before Operation 126 2 5 AUTO DRY COOL HEAT FAN Operation 129 2 6 Adjusting the Air Flow Direction 131 2 7 POWERFUL Operation 137 2 8 OUTDOOR UNIT SI...

Page 121: ...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 Howev...

Page 122: ...0AVMA Read before Operation Safety Precautions 112 112 112 112 Names of Parts 114 117 120 123 Preparation before Operation 126 126 126 126 Operation AUTO DRY COOL HEAT FAN Operation 129 129 129 129 Ad...

Page 123: ...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 instal...

Page 124: ...e 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 D...

Page 125: ...Instruction Si12 411A 114 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 126: ...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 Y...

Page 127: ...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...

Page 128: ...Si12 411A Instruction System Configuration 117 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 129: ...E 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 co...

Page 130: ...nce 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...

Page 131: ...Instruction Si12 411A 120 System Configuration CDK X D 25 35 50 60 C Names of parts Indoor Unit 3 6 8 9 10 7 1 4 5 2...

Page 132: ...peration 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...

Page 133: ...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 S...

Page 134: ...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 wa...

Page 135: ...rt 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...

Page 136: ...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 OUT...

Page 137: ...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 begin...

Page 138: ...ach 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 expo...

Page 139: ...r conditioner for a long 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...

Page 140: ...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...

Page 141: ...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 cap...

Page 142: ...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 pre...

Page 143: ...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...

Page 144: ...n 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 wil...

Page 145: ...d 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...

Page 146: ...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 butto...

Page 147: ...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 move...

Page 148: ...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...

Page 149: ...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...

Page 150: ...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 di...

Page 151: ...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...

Page 152: ...ovement 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 SE...

Page 153: ...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 als...

Page 154: ...rt 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...

Page 155: ...nit 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...

Page 156: ...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 i...

Page 157: ...ng 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 comb...

Page 158: ...GHT 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...

Page 159: ...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 ma...

Page 160: ...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 t...

Page 161: ...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 eve...

Page 162: ...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...

Page 163: ...er 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 Clos...

Page 164: ...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 wit...

Page 165: ...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 durin...

Page 166: ...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 h...

Page 167: ...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 th...

Page 168: ...warm 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...

Page 169: ...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 heati...

Page 170: ...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...

Page 171: ...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 condition...

Page 172: ...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...

Page 173: ...Instruction Si12 411A 162 System Configuration...

Page 174: ...5 8 Signal Transmission Error between Indoor and Outdoor Units 179 5 9 Unspecified Voltage between Indoor and Outdoor Units 180 5 10 Freeze up Protection Control 181 5 11 OL Activation Compressor Ove...

Page 175: ...re described in the following pages Location of Operation Lamp In case of FTK X S 20 25 35 Series FTK X E 25 35 Series ATXS 20 25 35 Series Grille type In case of FTK X S 50 60 71 Series FTK X D 50 60...

Page 176: ...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 s...

Page 177: ...gnosis with indoor unit LED indication 169 Diagnosis with outdoor unit LED indication 170 Some indoor units do not operate Check the type of the indoor units Check to make sure that the indoor unit ty...

Page 178: ...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 i...

Page 179: ...ature 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 E...

Page 180: ...nit A1 Indoor unit PCB abnormality 171 A5 Freeze up protection control or high pressure control heat pump model only 172 A6 Fan motor or related abnormality AC motor Wall 20 35 Duct Floor Ceiling 174...

Page 181: ...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 205 UH Anti icing function in oth...

Page 182: ...roubleshooting 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 powe...

Page 183: ...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 indo...

Page 184: ...er 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...

Page 185: ...n error due to faulty control PCB Troubleshooting Check No 16 Refer to P 215 Rotate the fan by hand Check No 16 Check Hall IC Operate the fan Does it rotate NO Does it rotate smoothly Is there an outp...

Page 186: ...on 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...

Page 187: ...ut 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 Doe...

Page 188: ...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 Re...

Page 189: ...relay harness or disconnected connector Detection error due to defective PCB 2 Foreign substance in blow port Troubleshooting Check No 3 Refer to P 206 Turn off the power Check No 3 Check the limit sw...

Page 190: ...al 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 212 Check the outdoor unit s LED A Check the...

Page 191: ...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 compa...

Page 192: ...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 prote...

Page 193: ...anger 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 pa...

Page 194: ...off valve defective Troubleshooting Check No 4 Refer to P 207 Check No 5 Refer to P 208 Check No 6 Refer to P 209 Check No 11 Refer to P 212 Insert the thermistor in position Replace the discharge pi...

Page 195: ...ut 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...

Page 196: ...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 Trou...

Page 197: ...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 ru...

Page 198: ...bove 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...

Page 199: ...hin 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 he...

Page 200: ...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 Malf...

Page 201: ...et 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...

Page 202: ...sor 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 213 Replace the outdoor...

Page 203: ...rent 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 wil...

Page 204: ...tch 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 C...

Page 205: ...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...

Page 206: ...ature thermistor Replace the following thermistor z 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 swi...

Page 207: ...cking 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...

Page 208: ...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 z Fin thermistor NO Slightly dirty Check No 9...

Page 209: ...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...

Page 210: ...r 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 co...

Page 211: ...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 Clear...

Page 212: ...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...

Page 213: ...s 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 fr...

Page 214: ...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...

Page 215: ...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 d...

Page 216: ...ion 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...

Page 217: ...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 volt...

Page 218: ...e 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 temperatur...

Page 219: ...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 v...

Page 220: ...rs 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 20k B 395...

Page 221: ...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 allowabl...

Page 222: ...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 deform...

Page 223: ...form 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 in...

Page 224: ...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 coi...

Page 225: ...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 reconne...

Page 226: ...r connected check the following Output voltage of about 5 V between pins 1 and 3 Generation of 3 pulses between pins 2 and 3 when the fan motor is operating Failure of 1 faulty PCB Replace the PCB Fai...

Page 227: ...Check Si12 411A 216 Service Diagnosis...

Page 228: ...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 50 52 58 68 75 Class 242 2 1 Removal of Outer Panels 242 2 2 Removal of...

Page 229: ...0 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 Remo...

Page 230: ...9 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 downward...

Page 231: ...s Si12 411A 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 remov...

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...

Page 233: ...uch 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 fig...

Page 234: ...arth 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 indi...

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 Procedu...

Page 236: ...e 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...

Page 237: ...0 Class Si12 411A 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...

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 e...

Page 239: ...Unit 80 90 Class Si12 411A 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...

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 boa...

Page 241: ...Outdoor Unit 80 90 Class Si12 411A 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: ...c 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...

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...

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 mo...

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...

Page 246: ...plies 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...

Page 247: ...11A 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...

Page 248: ...ten 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 r...

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...

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 sec...

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 D...

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 othe...

Page 253: ...r 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 2 Remove 4 screws of the top pa...

Page 254: ...bling 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 co...

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 con...

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...

Page 257: ...58 68 75 Class Si12 411A 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 St...

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...

Page 259: ...5 Class Si12 411A 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...

Page 260: ...emoval 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 scre...

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 wa...

Page 262: ...on 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...

Page 263: ...wer 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...

Page 264: ...sser 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 thermist...

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 br...

Page 266: ...eful 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 refrige...

Page 267: ...nd 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 compre...

Page 268: ...Si12 411A Others 257 Part 8 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...

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 CU...

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 a...

Page 272: ...Si12 411A Appendix 261 Part 9 Appendix 1 Piping Diagrams 262 1 1 Indoor Units 262 1 2 Outdoor Units 266 2 Wiring Diagrams 273 2 1 Indoor Units 273 2 2 Outdoor Units 276...

Page 273: ...HEAT EXCH INDOOR UNIT M 6 4CuT 7 0CuT 9 5CuT HEAT EXCHANGER REFRIGERANT FLOW HEATING COOLING 6 4CuT 6 4CuT 4D032969C M 4D033698D FIELD PIPING FIELD PIPING 6 4CuT 9 5CuT 7 9CuT REFRIGERANT FLOW FAN MO...

Page 274: ...grams Appendix 263 FTKD71BVM FTK X D71BVMA 15 9CuT FIELD PIPING FIELD PIPING 9 5CuT CROSS FLOW FAN FAN MOTOR 7 9CuT INDOOR UNIT 12 7CuT M HEAT EXCHANGER REFRIGERANT FLOW ON HEAT EXCH THERMISTOR COOLIN...

Page 275: ...HEAT EXCH CuT 4D045450 FIELD PIPING FIELD PIPING CuT 6 4CuT INDOOR UNIT SIROCCO FAN 6 4CuT CuT FAN MOTOR M REFRIGERANT FLOW HEAT EXCHANGER COOLING HEATING THERMISTOR ON HEAT EXCH CDKS35CVMB CDXS25CVMA...

Page 276: ...OOR 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 THERMISTOR 4D034714B FIELD PIPING FIELD PIPING 12 7CuT 6 4CuT REF...

Page 277: ...uT 12 7 CuT 12 7 CuT 3D036222B 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 MO...

Page 278: ...A ROOM B ROOM C ROOM B ROOM C ROOM A 3D036220B 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 EXC...

Page 279: ...FILTER FILTER FILTER 6 4CuT 6 4CuT 9 5CuT 9 5CuT 12 7CuT 15 9CuT 15 9CuT 15 9CuT ROOM A ROOM B ROOM C ROOM D ROOM A ROOM C ROOM B ROOM D PIPING FIELD FIELD GAS LIQUID PIPING OUTDOOR UNIT 3D036504B RE...

Page 280: ...uT 6 4 CuT 12 7 CuT 12 7 CuT ROOM D ROOM C ROOM B ROOM A ROOM D ROOM C ROOM B ROOM A 3D034514C GAS FIELD FIELD PIPING PIPING LIQUID REFRIGERANT FLOW 9 5CuT HEAT EXCHANGER THERMISTOR DE OUTDOOR UNIT CO...

Page 281: ...LINE STOP VALVE 9 5CuT 12 7CuT HEADER HEADER FILTER MOTOR OPERATED VALVE MOTOR OPERATED VALVE 7 9CuT 7 9CuT 7 9CuT 7 9CuT MOTOR OPERATED VALVE MOTOR OPERATED VALVE 12 7CuT 12 7CuT 12 7CuT 12 7CuT EVA...

Page 282: ...FILTER 9 5 CuT 9 5 CuT 6 4 CuT 6 4 CuT 6 4 CuT 12 7 CuT ROOM A ROOM B ROOM C ROOM A ROOM B ROOM C 3D034512D GAS FIELD FIELD PIPING LIQUID PIPING REFRIGERANT FLOW HEADER HEAT EXCHANGER THERMISTOR DE O...

Page 283: ...OM D 3D034511C GAS FIELD FIELD PIPING PIPING LIQUID REFRIGERANT FLOW HEADER 12 7CuT OUTDOOR UNIT HEAT EXCHANGER THERMISTOR DE COOLING HEATING 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT PR...

Page 284: ...ED 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 outdoor 3D033599E 3D038065G CONTROLLER WIRE...

Page 285: ...ON SWITCH X1M 3 2 1 PROTECTIVE EARTH 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 3D038530J OUTDOOR PCB2 RECE...

Page 286: ...UTOMATICALLY IF 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 3D033909D outdoor CONTROLL...

Page 287: ...N BLU BRN RED YLW 1 X11A 10 10 BLU 3D034318D S93 YLW BRN BLU RED 1 GRY S40 V 1 M1F M1C 3 M BLK M 4 W U Q1L BLK 9 N ROOM A ROOM B ROOM C TO INDOOR UNIT 3 3 3 2 2 2 POWER SUPPLY 1 1 1 FIELD WIRING 60Hz...

Page 288: ...34 8 t YLW WHT RED ORG BRN BLU BLU RED BRN YLW 1 3D034848F X11A 10 10 BLU S93 YLW 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 POWER SUPPLY ROOM A ROOM B ROOM C FIE...

Page 289: ...SSOR MOTOR SELECT SW SW2 DIODE BRIDGE WIRING ERROR CHECK SW SW3 NIGHT QUIET MODE SETTING SW SW5 PRINTED CIRCUIT BOARD PRIORITY ROOM SETTING SW SW4 BLU 12 S2 12 BLU S3W 1 1 RED S102 S101 BLK V5 S4W WHT...

Page 290: ...X11A 10 t 10 R5T BLU GRY ROOM C S93 YLW t BRN BLU RED R6T 1 YLW GRY V S40 t 1 3 M1F M1C M M BLK 4 W U Q1L BLK 9 N ROOM A ROOM B ROOM C ROOM D TO INDOOR UNIT POWER SUPPLY 50Hz 220 240V 60Hz 220 230V 3...

Page 291: ...RENT TRANSFORMER M1C COMPRESSOR MOTOR Q1L OVERLOAD PROTECTOR BLU BLU S1W H1P BLU BLU BLU 12 S2 12 BLU S3W 1 1 RED S102 S101 BLK V5 S4W WHT 5 5 GRN MRM20 MRM10 FU2 3 15A MRB 1 MRD Y1S BLU MRC W Y1R BLK...

Page 292: ...No 8 211 check No 9 211 compressor 240 256 compressor lock 184 compressor overload 183 compressor protection function 93 connection pipe condensation preventing function 107 control PCB 62 63 64 68 6...

Page 293: ...02 insufficient gas control 103 INTELLIGENT EYE 79 INTELLIGENT EYE operation 141 INTELLIGENT EYE sensor 260 INTELLIGENT EYE sensor PCB 62 inverter PCB 231 249 inverter powerful operation 82 inverter u...

Page 294: ...1 244 253 S93 69 224 231 244 253 SC control 101 self diagnosis digital display 84 sensor malfunction detection 103 service check function 167 service monitor PCB 231 247 249 shunt 237 254 255 shutter...

Page 295: ...Si12 411A iv Index...

Page 296: ...l 88 heat pump model 86 H Hall IC check 215 heating peak cut control 95 HOME LEAVE operation 81 I indoor unit PCB abnormality 171 input current control 94 input over current detection 186 installation...

Page 297: ...77 thermistor or related abnormality outdoor unit 194 thermistor resistance check 209 troubleshooting with the LED indication 165 turning speed pulse input on the outdoor unit PCB check 214 U unspecif...

Page 298: ...Si12 411A Printed in Singapore 03 2005 AK COS...

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