Daikin FTK Series, Service Manual

Page 1: ...ce Manual DAMA SM 21 001 Service Manual Inverter Split Wall Mounted Type FTK X Series DAMA SM 21 001 Inverter Split Wall Mounted Type FTK X Series Applied Models z Inverter Split Cooling Unit Heat Pump Unit ...

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Page 3: ...eed Control for Indoor Unit 26 1 5 Dry Mode 27 1 6 Automatic Operation 28 1 7 Thermostat Control 29 1 8 ECO Operation 30 1 9 Sleep Mode 31 1 10 POWERFUL Operation 31 1 11 Other Functions 32 2 Thermistor Functions 33 3 Control Specification 34 3 1 Mode Hierarchy 34 3 2 Frequency Control 35 3 3 Standby Electricity Saving Suspend Function 37 3 4 Controls at Mode Changing Start up 38 3 5 Discharge Pip...

Page 4: ...10 Outdoor Unit PCB Abnormality 68 4 11 OL Activation Compressor Overload 69 4 12 Compressor Lock 71 4 13 DC Fan Lock 72 4 14 Input Overcurrent Detection 73 4 15 Discharge Pipe Temperature Control 74 4 16 High Pressure Control in Cooling 75 4 17 Compressor System Sensor Abnormality 77 4 18 Position Sensor Abnormality 78 4 19 Thermistor or Related Abnormality Outdoor Unit 79 4 20 Electrical Box Tem...

Page 5: ... 97 3 Silicone Grease on Power Transistor Diode Bridge 98 Part 7 Appendix 99 1 Piping Diagrams 100 1 1 Indoor Unit 100 1 2 Outdoor Unit 103 2 Wiring Diagrams 107 2 1 Indoor Unit 107 2 2 Outdoor Unit 108 2 3 Printed Circuit Board Connector Wiring Diagram 110 2 4 Printed Circuit Board Connector Wiring Diagram 111 3 Operation Limit 113 ...

Page 6: ... SM 21 001 Introduction 1 1 Safety Cautions 2 1 1 Warnings and Cautions Regarding Safety of Workers 2 1 2 Warnings and Cautions Regarding Safety of Users 8 2 Icons Used 10 3 Revision History 11 Introduction ...

Page 7: ...e person in charge of maintenance and inspection This appliance is filled with R410A Warning Do not store equipment in a room with fire sources e g naked flames gas appliances electric heaters Be sure to disconnect the power cable from the socket before disassembling equipment for repair Working on equipment that is connected to the power supply may cause an electrical shock If it is necessary to ...

Page 8: ...em an excessively high pressure results causing equipment damage and injury Caution Do not repair electrical components with wet hands Working on the equipment with wet hands may cause an electrical shock Do not clean the air conditioner with water Washing the unit with water may cause an electrical shock Be sure to provide an earth grounding when repairing the equipment in a humid or wet place to...

Page 9: ...gnition sources including cigarette smoking should be kept at a safe distance from the site of installation repairing or removing space Before starting work the area around the equipment shall be examined to make sure that there are no flammable hazard or ignition risks No Smoking signs shall be displayed Ventilated area Ensure that the working area is open or that it is adequately ventilated befo...

Page 10: ...erent from the original specification damage to seals incorrect fitting of glands etc Ensure that the equipment is mounted securely Ensure that seals or sealing materials have not degraded such that they no longer serve the purpose of preventing the ingression of flammable atmospheres Replacement parts shall be in accordance with the manufacturer s specifications The use of silicon sealant may inh...

Page 11: ...Purge the circuit with inert gas Evacuate the inert gas Purge again with inert gas Carry out cutting or brazing of the circuit The refrigerant shall be recovered into the correct recovery cylinders The system shall be cleaned with OFN to render the unit safe Flushing This process may need to be repeated several times Compressed air or oxygen shall not be used for this task Flushing shall be achiev...

Page 12: ... that there are labels on the equipment stating the equipment contains R410A Refrigerant recovery When removing refrigerant from a system either for servicing or decommissioning it is recommended to conduct training so that all refrigerants can be removed safely When transferring refrigerant into cylinders ensure that only appropriate refrigerant recovery cylinders are used Ensure that the correct...

Page 13: ...the cable at the connection terminals Improper connections may cause excessive heat generation or fire When wiring between the indoor and outdoor units make sure that the terminal cover does not lift off or dismount because of the cable If the cover is not mounted properly the terminal connection section may cause an electrical shock excessive heat generation or fire Do not damage or modify the po...

Page 14: ... a fire Check to see if parts and wires are mounted and connected properly and if connections at the soldered or crimped terminals are secure Improper installation and connections may cause excessive heat generation fire or an electrical shock If the installation platform or frame has corroded replace it A corroded installation platform or frame may cause the unit to fall resulting in injury Check...

Page 15: ...Caution is used when there is danger that the reader through incorrect manipulation may damage equipment lose data get an unexpected result or have to restart part of a procedure Note Note Note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Reference Reference Reference guides the reader to other places in this binder or in thi...

Page 16: ...DAMA SM 21 001 Revision History Introduction 11 3 Revision History Month Year Version Revised contents 03 2021 DAMA SM 21 001 First edition ...

Page 17: ...DAMA SM 21 001 12 Part 1 General Information 1 Applicable Models 13 Part 1 General Information ...

Page 18: ...del Name and Power Supply Mode Indoor Unit Outdoor Unit Power Supply Cooling Only FTK09AXVJU RK09AXVJU 1Phase 208 230V 60Hz FTK12AXVJU RK12AXVJU FTK18AXVJU RK18AXVJU FTK24AXVJU RK24AXVJU Heatpump FTX09AXVJU RX09AXVJU FTX12AXVJU RX12AXVJU FTX18AXVJU RX18AXVJU FTX24A XVJU RX24AXVJU ...

Page 19: ...ct Type T Wall Mounted System K Inverter Cooling Only X Inverter Heatpump Capacity Indication 09 9 000 Btu h Major Design Category A A Series Factory Origin X Malaysia Power Supply VJ 208 230V 1Ph 60Hz Country U United States Definition Description Unit Category R Air Cooled Split Outdoor Unit System K Inverter Cooling Only X Inverter Heatpump Capacity Indication 09 9 000 Btu h Major Design Catego...

Page 20: ...DAMA SM 21 001 Part 2 Specifications 15 1 Specification Data 16 2 Functions 22 Part 2 Specifications ...

Page 21: ...O Fan Motor Type DIRECT CURRENT Motor Output W 38 38 Running Current Rated A 0 17 0 17 Power Consumption Rated W 53 53 Air Direction Control UP DOWN LEFT RIGHT Air Filter CATECHIN Dimensions H X W X D inch mm 11 1 3 X 30 29 32 X 9 27 32 288 X 785 X 250 Packaged Dimensions H X W X D inch mm 13 7 8 X 32 3 4 X 12 3 8 350 X 830 X 314 Weight lbs kg 20 9 22 10 Gross Weight lbs kg 25 11 27 12 Condensate ...

Page 22: ...or Type DIRECT CURRENT Motor Output W 35 Running Current Rated A 0 145 Power Consumption Rated W 47 Air Direction Control UP DOWN LEFT RIGHT Air Filter CATECHIN Dimensions H X W X D inch mm 11 11 16 X 39 1 2 X 11 1 3 297 X 1005 X 288 Packaged Dimensions H X W X D inch mm 14 1 4 X 42 1 4 X 14 1 8 362 X 1073 X 358 Weight lbs kg 31 14 Gross Weight lbs kg 38 17 Condensate Drain Size in mm 3 4 19 00 OU...

Page 23: ...RECT CURRENT Motor Output W 38 Running Current Rated A 0 17 Power Consumption Rated W 53 Air Direction Control UP DOWN LEFT RIGHT Air Filter CATECHIN Dimensions H X W X D inch mm 11 1 3 X 30 29 32 X 9 27 32 288 X 785 X 250 Packaged Dimensions H X W X D inch mm 13 7 8 X 32 3 4 X 12 3 8 350 X 830 X 314 Weight lbs kg 20 9 Gross Weight lbs kg 25 11 Condensate Drain Size in mm 3 4 19 00 OUTDOOR UNIT RX...

Page 24: ...CT CURRENT Motor Output W 38 Running Current Rated A 0 17 Power Consumption Rated W 53 Air Direction Control UP DOWN LEFT RIGHT Air Filter CATECHIN Dimensions H X W X D inch mm 11 1 3 X 30 29 32 X 9 27 32 288 X 785 X 250 Packaged Dimensions H X W X D inch mm 13 7 8 X 32 3 4 X 12 3 8 350 X 830 X 314 Weight lbs kg 22 10 Gross Weight lbs kg 27 12 Condensate Drain Size in mm 3 4 19 00 OUTDOOR UNIT RX1...

Page 25: ...ENT Motor Output W 38 Running Current Rated A 0 145 Power Consumption Rated W 47 Air Direction Control UP DOWN LEFT RIGHT Air Filter CATECHIN Dimensions H X W X D inch mm 11 11 16 X 39 1 2 X 11 1 3 297 X 1005 X 288 Packaged Dimensions H X W X D inch mm 14 1 4 X 42 1 4 X 14 1 8 362 X 1073 X 358 Weight lbs kg 31 14 Gross Weight lbs kg 38 17 Condensate Drain Size in mm 3 4 19 00 OUTDOOR UNIT RX18A Ca...

Page 26: ...ENT Motor Output W 35 Running Current Rated A 0 145 Power Consumption Rated W 47 Air Direction Control UP DOWN LEFT RIGHT Air Filter CATECHIN Dimensions H X W X D inch mm 11 11 16 X 39 1 2 X 11 1 3 297 X 1005 X 288 Packaged Dimensions H X W X D inch mm 14 1 4 X 42 1 4 X 14 1 8 362 X 1073 X 358 Weight lbs kg 31 14 Gross Weight lbs kg 38 17 Condensate Drain Size in mm 3 4 19 00 OUTDOOR UNIT RX24A Ca...

Page 27: ...efrosting Operation Automatic Operation Programme Dry Operation Fan Only Lifestyle Convenience Powerful Operation Non Inverter Inverter Powerful Operation Energy Saving Function Sleep Mode Indoor Unit ON OFF Button R C with Backlight Signal Receiving Sign R C Set Temperature Display R C Health Clean Saranet Filter Catechin Filter Green Tea Filter Titanium Apatite Air Purifying Filter PM 2 5 Filter...

Page 28: ...unctions 32 2 Thermistor Functions 33 3 Control Specification 34 3 1 Mode Hierarchy 34 3 2 Frequency Control 35 3 3 Standby Electricity Saving Suspend Function 37 3 4 Controls at Mode Changing Start up 37 3 5 Discharge Pipe Temperature Control 39 3 6 Input Current Control 40 3 7 Freeze up Protection Control 41 3 8 Heating Peak cut Control 42 3 9 Outdoor Fan Control 43 3 10 Liquid Compression Prote...

Page 29: ...compressor is controlled by the following 2 parameters The load condition of the operating indoor unit The difference between the room thermistor temperature and the target temperature The target frequency is adapted by additional parameters in the following cases Frequency restrictions Initial settings Forced cooling operation Inverter Principle To regulate the capacity a frequency control is nee...

Page 30: ...the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following functions regulate the minimum and maximum frequency Compressor protection function Refer to page 37 Discharge pipe temperature control Refer to page 39 Input current control Refer to page 40 Freeze up protection control Refer to page 41 Forced Cooling Ope...

Page 31: ...t FTK X Outline Phase control and fan speed control contains 5 steps SL L M H SH The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the set temperature In heating mode the indoor fan speed will be regulated according to the indoor heat exchanger temperature and the difference between the room temperature and the required set tem...

Page 32: ...re inoperable Details The microcomputer automatically sets the airflow rate The difference between the room thermister temperature and the set temperature is divided into zones Then the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Zone B continues to stay for 120 seconds before the unit will turn to thermostat ON Series Clas...

Page 33: ...ng switching point Room temperature Main unit setting temperature 2 5 deg 4 5 F c Thermostat ON OFF point is the same as the ON OFF point of cooling or heating operation 4 During initial operation Room temperature Remote controller setting temperature Cooling operation Room temperature Remote controller setting temperature Heating operation Ex When the set temperature is 25 C 77 F Scenario 1 Therm...

Page 34: ... The temperature difference returns to the zone C after being in the zone A The operation turns on in any zones except A The monitoring time has passed while the temperature difference is in the zone B Cooling Dry Heating 2 minutes Cooling Dry Heating Zone B Zone B Zone A Zone A OFF OFF ON ON Zone C Zone C 1 0 C 1 8 F Cooling 0 5 C 0 9 F Dry 0 5 C 0 9 F Cooling Dry 1 5 C 2 7 F Room thermistor temp...

Page 35: ...ners It can be easily activated by pressing ECO button on the wireless remote controller Details Cool mode User set temperature 24 C 75 F User set temperature 24 C 75 F Heat mode User set temperature 20 C 68 F User set temperature 20 C 68 F 24 75 Unit runs at 24 C 75 F ECO activated User set temp Unit runs at user set temperature 1 C 1 8 F User set temp 1 C 1 8 F ECO activated 24 75 User set temp ...

Page 36: ... can be operated by increasing the indoor fan rotating speed and the compressor frequency Details When POWERFUL button is pressed the fan speed and target temperature are converted to the following states for 20 minutes H high fan A refer table below POWERFUL operation cannot be used together with ECO operation target temperature COOL or DRY run sleep operation target temperature HEAT 1hr 1hr shif...

Page 37: ...ll not be started if the ON OFF switch is pressed for 10 seconds or more 1 11 3 Auto restart Function If a power failure even a momentary one occurs during the operation the operation restarts automatically in the same conditions as before when the power supply is restored to the conditions prior to the power failure It takes 3 minutes to restart the operation because 3 minute standby function is ...

Page 38: ...istor detects the outdoor air temperature and is used for refrigerant shortage detection input current control outdoor fan control liquid compression protection function and so on 4 Indoor Heat Exchanger Thermistor The indoor heat exchanger thermistor is used for controlling the target discharge pipe temperature The system sets the target discharge pipe temperature according to the outdoor and ind...

Page 39: ... Cooling includes drying Heating includes defrosting Stop Unless specified otherwise dry operation command is regarded as cooling operation Air conditioner control mode Forced operation mode Forced cooling operation for pump down operation Power transistor test mode Normal operation mode Fan Cooling includes drying Stop indoor unit OFF Discharging from capacitor Stop Heating Defrosting Stop mode e...

Page 40: ...r of priority 1 1 Limiting frequency by drooping function Input current discharge pipes peak cutting freeze up protection dew prevention fin thermistor temperature 1 2 Limiting defrost control time 1 3 Forced cooling 1 4 Indoor frequency command 2 Determine upper limit frequency Set a minimum value as an upper limit frequency among the frequency upper limits of the following functions Compressor p...

Page 41: ... controls are functioning When frequency is dropping Frequency control is carried out only when the frequency drops For controlling lower limit Frequency control is carried out only when the frequency rises 4 Upper and lower limit of frequency by PI control The frequency upper and lower limits are set according to the command of the indoor unit When the indoor unit quiet operation command comes fr...

Page 42: ...nd state when some voltage is applied to the outdoor unit for protection purpose even if the indoor unit is not in operation In suspend state power supply to the outdoor unit is halted and there is no communication between the indoor unit and the outdoor unit Also the service monitor LED LED A lights off To return from the suspend state start fan or other operation to turn on the indoor unit 3 4 C...

Page 43: ... 4 4 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 certain fixed frequency for a certain fixed time Details Starting Conditions 1 When starting compressor for heating 2 When the ...

Page 44: ...trol Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequency is kept Up zone The upper limit of frequency increases Reset zone The upper limit of frequency is cancelled 09 12 18 24 A C 110 0 110 0 B C 103 0 103 0 C C 98 0 101 5 D C 93 0 100 0 E C 88 0 95 0 09 12 18 24 A F 230 0 230 0 B F 2...

Page 45: ...trol Stop zone After the input current remains in the stop zone for 2 5 seconds the compressor is stopped Dropping The upper limit of the compressor frequency is defined as operation frequency 2 Hz After this the output frequency is lowered by 2 Hz every second until it reaches the keep zone Keep zone The present maximum frequency goes on Reset zone Limit of the frequency is cancelled Model 09 12 ...

Page 46: ...he indoor heat exchanger temperature Frequency control in each zone Zone Control Reset zone The upper limit of frequency is cancelled Up zone The upper limit of frequency increases Keep zone The upper limit of frequency is kept Dropping zone The upper limit of frequency decreases Stop zone When indoor coil temperature 0 C for 80s compressor is stopped A C B C C C All outdoor units 7 0 5 0 3 0 A F ...

Page 47: ... controls the following Frequency control in each zone Zone Control Stop zone When indoor coil temperature stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequency is kept Up zone The upper limit of frequency increases Reset zone The upper limit of frequency is cancelled 09 12 18 24 A C 59 0 59 0 65 0 65 0 B C 55 0 55 0 56 0 56 0 C ...

Page 48: ... is reduced When the pressure difference is high the rotation speed of the outdoor fan is controlled as well as normal operation 4 Fan speed control during forced cooling operation The outdoor fan is controlled as well as normal operation during forced cooling operation 5 Fan speed control during POWERFUL operation The rotation speed of the outdoor fan is increased during POWERFUL operation 6 Fan ...

Page 49: ...ails Conditions for Starting Defrost The starting conditions must be made with the outdoor air temperature and heat exchanger temperature Under the conditions that the system is in heating operation 6 minutes after the compressor is started and more than 28 minutes of accumulated time pass since the start of the operation or ending the defrosting Conditions for Canceling Defrost The judgment must ...

Page 50: ...c expansion valve control is shown as below 3RZHU 21 3RZHU 6XSSO 5HVHW QLWLDOL HG IXOO FORVHG DV 3RZHU 6XSSO 21 OHFWURQLF H SDQVLRQ YDOYH FRQWURO DW VWDUW XS 7DUJHW GLVFKDUJH SLSH WHPSHUDWXUH FRQWURO HHGEDFN FRQWURO LJK GLVFKDUJH SLSH WHPSHUDWXUH FRQWURO HIURVW FRQWURO 5HKHDW GHKXPLGLrFDWLRQ FRQWURO LJK GLVFKDUJH SLSH WHPSHUDWXUH FRQWURO GRHV QRW IXQFWLRQ ZKHQ WKH GLVFKDUJH SLSH WKHUPLVWRU LV GLVF...

Page 51: ...e or the thermostat is turned OFF Fully closed open 400 pluses 3 12 4 Initialization as Power Supply On The electronic expansion valve is initialized fully closed when the power is turned on Then the valve opening position is set and the pressure is equalized 3 12 5 Pressure Equalizing Control When the compressor is stopped the pressure equalizing control is activated The electronic expansion valv...

Page 52: ...r a specified time and then stops After 3 minutes the operation restarts and checks if the discharge pipe thermistor is disconnected If the discharge pipe thermistor is disconnected the system stops after operating for a specified time If the disconnection is detected repeatedly the system is shut down When the compressor runs for 60 minutes without any error the error counter is reset Details Det...

Page 53: ...e actual discharge pipe temperature becomes close to the target discharge pipe temperature Indirect SH superheating control using the discharge pipe temperature The electronic expansion valve opening and the target discharge pipe temperature are adjusted every A seconds The opening degree of the electronic expansion valve is adjusted by the following Target discharge pipe temperature Actual discha...

Page 54: ... temperature thermistor 3 13 2 Detection of Overcurrent and Overload Outline In order to protect the inverter an excessive output current is detected in wire labelled as No 1 at outdoor terminal block and the OL temperature is observed to protect the compressor Details If the inverter current exceeds A A the system shuts down the compressor If the OL compressor head temperature exceeds B C F the c...

Page 55: ...DAMA SM 21 001 Remote Controller 50 1 Applicable Remote Controller 51 2 BRC52B63 64 52 Part 4 Remote Controller ...

Page 56: ...Applicable Remote Controller DAMA SM 21 001 51 Remote Controller 1 Applicable Remote Controller Series Model Name Remote Controller FTK FTK09 12 18 24AXVJU BRC52B64 FTX FTX09 12 18 24AXVJU BRC52B63 ...

Page 57: ...unction Mode Button Change between the available operating modes ON Timer Button Enable Disable and change ON Timer setting CLOCK Button Changes RTC selling SLEEP Button Enable Disable SLEEP function UP DOWN SWING Button Direct the air flow in up down direction POWERFUL Button Enable Disable POWERFUL function ECO Button Enable Disable ECO function OFF Timer Button Enable Disable and change OFF Tim...

Page 58: ...r Overload 69 4 12 Compressor Lock 71 4 13 DC Fan Lock 72 4 14 Input Overcurrent Detection 73 4 15 Discharge Pipe Temperature Control 74 4 16 High Pressure Control in Cooling 75 4 17 Compressor System Sensor Abnormality 77 4 18 Position Sensor Abnormality 78 4 19 Thermistor or Related Abnormality Outdoor Unit 79 4 20 Electrical Box Temperature Rise 81 4 21 Radiation Fin Temperature Rise 82 4 22 Ou...

Page 59: ...n Operation lamp OFF Check the outdoor temperature Cooling operation is not available when the outdoor temperature is out of the operation limit Check the reference page for the operation limit 113 Diagnose with remote controller indication 57 The unit operates but does not cool Check for wiring and piping errors in the connection between the indoor and outdoor units Check for thermistor detection...

Page 60: ...or or outdoor unit is activated or the thermistor malfunctions 2 A signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages 2 2 Outdoor Unit The outdoor unit has a green LED LED A on the PCB When the microcomputer works in order the LED A blinks Refer to pages 111 112 for the location of LED A ON OFF swit...

Page 61: ... GV Press Timer CANCEL to scroll to next 1 A short beep and two consecutive beeps indicate non corresponding codes 2 To return to the normal mode GV Press Timer CANCEL for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the normal mode TIMER CANCEL OFF C GV FT X A ...

Page 62: ...related abnormality 62 C9 Room temperature thermistor or related abnormality 63 Outdoor Unit E1 Outdoor unit PCB abnormality 68 E5 OL activation compressor overload 69 E6 Compressor lock 71 E7 DC fan lock 72 E8 Input overcurrent detection 73 F3 Discharge pipe temperature control 74 F6 High pressure control in cooling 75 EA Four way valve abnormality 85 H0 Compressor sensor system abnormality 77 H6...

Page 63: ... overcurrent sensor abnormal H8 AC current sensor error H9 Outdoor air thermistor short open J1 Pressure sensor error J3 Compressor discharge pipe thermistor short open misplaced J5 Suction pipe thermistor short open J6 Outdoor heat exchanger thermistor short open J7 Subcooling heat exchanger thermistor short open J8 Liquid pipe thermistor short open J9 Gas pipe thermistor short open L1 Inverter o...

Page 64: ...power supply Press the ON OFF switch Can be pressed Turn on the power supply Is error repeat Completed Completed Remove the casing Press the ON OFF switch again Is the ON OFF switch can be pressed Turn off the power supply replace the indoor unit PCB Display PCB Turn on the power supply Turn on the power supply Is error repeat Is error repeat Replace the indoor unit PCB Control PCB Replace the ind...

Page 65: ...nger thermistor is above 61 C 141 8 F Supposed Causes Indoor Short circuited air Clogged air filter of the indoor unit Dust accumulation on the indoor heat exchanger Defective indoor heat exchanger thermistor Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 87 When replacing the defective thermistor s replace the thermistor as ASSY NO NO NO Check No 01 Check the indoor heat exchang...

Page 66: ... speed of the target tap and is less than 50 of the maximum fan motor rotation speed Possible Root Causes 1 Indoor fan motor winding short or the motor lead wire broken 2 Indoor PCB faulty Troubleshooting Does it rotate Change fan motor Check fan motor connector condition Connect correctly No Yes Yes Change Fan motor Complete No No Yes Replace the indoor unit PCB control PCB and turn on power Is e...

Page 67: ...Ω Supposed Causes Disconnection of connector Defective thermistor s Defective indoor unit PCB Troubleshooting C4 Indoor heat exchanger thermistor Check No 01 Refer to P 87 When replacing the defective thermistor s replace the thermistor as ASSY YES NO Check No 01 Check the thermistor resistance value YES NO Correct the connection Replace the defective thermistor Replace the indoor unit PCB control...

Page 68: ...r Ω Supposed Causes Disconnection of connector Defective thermistor s Defective indoor unit PCB Troubleshooting C9 Room temperature thermistor Check No 01 Refer to P 65 When replacing the defective thermistor s replace the thermistor as ASSY YES NO Check No 01 Check the thermistor resistance value YES NO Correct the connection Replace the defective thermistor Replace the indoor unit PCB control PC...

Page 69: ...voltage out of specification Defective DC voltage detection circuit Defective over voltage detection circuit Defective PAM control part Disconnection of compressor harness Short circuit inside the fan motor winding Noise Momentary drop of voltage Momentary power failure Defective outdoor unit PCB Correct the power supply Check for such factors for a long term NO NO YES YES NO YES YES Reconnect the...

Page 70: ...rror Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of the data is abnormal Supposed Causes Power supply voltage out of specification Reduction of power supply voltage Wiring miss connection Breaking of the connection wires between the indoor and outdoor units wire no 3 SIG Defective outdoor unit PCB Short circuit inside the fan motor winding Def...

Page 71: ...d the outdoor unit Replace the outdoor unit PCB main PCB Replace the connection wires between the indoor unit and outdoor unit Is LED A blinking Properly insulated Is there any disturbance Is there any wiring error Check the connection wires between the indoor unit and the outdoor unit Check the LED A on the outdoor unit PCB NO YES Check the power supply voltage Correct the power supply YES NO Rep...

Page 72: ...nected Wrong wiring of connecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting NO YES YES NO Match the compatible models OK Correct the connection Are the connecting wires connected properly Check the combination of the indoor and outdoor unit Be sure to turn off the power switch before connecting or disconnecting conn...

Page 73: ... control The zero cross signal is not detected Supposed Causes Defective outdoor unit PCB Noise Momentary drop of voltage Momentary power failure Troubleshooting YES NO NO YES Replace the outdoor unit PCB main PCB Ground the system The cause can be external factors other than malfunction Investigate the cause of noise Turn on the power Error again Check if the outdoor unit is grounded Grounded Be ...

Page 74: ...s shut down Reset condition Continuous run for about 60 minutes without any other error Possible Root Causes 1 Disconnection of discharge pipe thermistor 2 Defective discharge pipe thermistor 3 Disconnection of connector S40 4 Disconnection of 2 terminals of OL Q1L 5 Defective OL Q1L 6 Broken OL harness 7 Defective electronic expansion valve or coil 8 Defective four way valve or coil 9 Defective o...

Page 75: ...isconnect the connector S40 from the PCB Check the resistance between the 2 terminals on connector S40 Check the electronic expansion valve Check the refrigerant line Check the four way valve Disconnect the 2 terminals of the OL Q1L Check the resistance between the 2 terminals of the OL Q1L Refrigerant shortage Water mixed Stop valve Insert the thermistor in position Replace the discharge pipe the...

Page 76: ...r Supposed Causes Closed stop valve Compressor locked Disconnection of compressor harness Troubleshooting Check No 12 Refer to P 88 Stop valve closed YES NO YES NO YES NO Open the stop valve System shut down after errors repeated several times Emergency stop without compressor running Turn off and turn on the power to restart the system Check the electronic expansion valve coil Go to Check No 12 R...

Page 77: ...onnection of the fan motor Foreign matter stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 90 YES YES NO YES NO NO YES NO Turn on the power Rotate the fan Turn off the power and reconnect the connector Remove the foreign matters Replace the outdoor fan motor Replace the outdoor unit PCB main PCB Replace the outdoor fan motor Fan motor connector...

Page 78: ...e power module Defective outdoor unit PCB Short circuit Troubleshooting Cautions Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged An input overcurrent may result from wrong internal wiring If the system is interrupted by an input overcurrent after the wires have been disconnected and reconnected for part displacement check the wiring again ...

Page 79: ...ter mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 87 Check No 12 Refer to P 88 Check No 14 Refer to P 90 When replacing the defective thermistor s replace the thermistor as ASSY Model 09 12 Model 09 12 A C B C A F B F Maximum limit 110 0 88 0 Maximum limit 230 0 190 4 Model 18 24 Model 18 24 A C B C A F B F Maximum limit 110 0 95 0 Maxi...

Page 80: ...r unit PC Troubleshooting A C B C A F B F 09 59 0 52 0 09 138 2 125 6 12 59 0 52 0 12 138 2 125 6 18 60 0 51 0 18 140 0 123 8 24 60 0 51 0 24 140 0 123 8 Replace the outdoor fan motor Reconnect the connector or fan motor lead wires Replace the stop valve Replace the outdoor heat exchanger thermistor Replace the outdoor unit PCB main PCB Replace the electronic expansion valve or the coil Replace th...

Page 81: ...ference Reference Reference Reference Reference Note Check No 01 Refer to P 87 Check No 12 Refer to P 88 Check No 17 Refer to P 91 Check No 18 Refer to P 91 Check No 19 Refer to P 92 When replacing the defective thermistor s replace the thermistor as ASSY ...

Page 82: ...oltage before compressor start up is below 50 V Supposed Causes Broken or disconnected harness Defective outdoor unit PCB Troubleshooting NO YES Turn off the power Then turn on the power to restart the system YES NO Replace the harness Replace the outdoor unit PCB main PCB Is the harness broken Restart operation and error displayed again Check the relay harness for the compressor Not a malfunction...

Page 83: ... compressor harness Defective compressor Defective outdoor unit PCB Start up failure caused by the closed stop valve Input voltage out of specified range Troubleshooting Check No 18 Refer to P 91 Check No 20 Refer to P 92 Voltage as rated OK Normal Correct the power supply Replace the stop valve Replace the outdoor unit PCB main PCB Replace the outdoor unit PCB main PCB compressor Reconnect the el...

Page 84: ...ting or disconnecting connectors or parts may be damaged Replace the outdoor unit PCB main PCB Troubleshooting In case of H9 J3 J6 and P4 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged H9 Outdoor temperature thermistor Caution Caution Error displayed again on remote controller Indoor heat exchanger thermistor functioning Check the indoor ...

Page 85: ...DAMA SM 21 001 Troubleshooting Service Diagnosis 80 Reference Note Check No 01 Refer to P 87 When replacing the defective thermistor s replace the thermistor as ASSY ...

Page 86: ...er to P 91 Check No 19 Refer to P 92 A C B C C C A F B F C F 09 82 0 65 0 70 09 179 6 149 0 158 0 12 82 0 65 0 70 0 12 179 6 149 0 158 0 18 90 0 64 0 81 0 18 194 0 147 2 177 8 24 90 0 64 0 81 0 24 194 0 147 2 177 8 WARNING YES NO YES NG NO OK NO YES Turn off the power Then turn on the power to restart the system Check the radiation fin temperature Radiation fin dirty Check No 19 Check the outdoor ...

Page 87: ...outdoor unit PCB Troubleshooting Refer to Silicone Grease on Power Transistor Diode Bridge on page 98 for details Check No 17 Refer to P 91 Check No 19 Refer to P 92 A C B C A F B F 09 99 0 70 0 09 210 2 158 0 12 99 0 70 0 12 210 2 158 0 18 100 0 57 0 18 212 0 134 6 24 100 0 57 0 24 212 0 134 6 Turn off the power Then turn on the power to restart the system NO NG OK NO YES Check the radiation fin ...

Page 88: ...he compressor is running A rotation speed error occurs while the compressor is running An output overcurrent is fed from the output overcurrent detection circuit to the microcomputer If error repeats the system is shut down Reset condition Continuous run for about 5 minutes without any other error Possible root Causes Poor installation condition Closed stop valve Defective power module Wrong inter...

Page 89: ... system See if the same error occurs Short circuit of wire breakage between compressor s coil phases Monitor the power supply voltage discharge and suction pressures and other factors for a long term Possible causes Momentary drop of power supply voltage Compressor overload Short circuit Fully open the stop valve Replace the compressor Correct the power supply Check the discharge pressure Go to Ch...

Page 90: ...ed to see if the function within their normal ranges in the operating mode Malfunction Decision Conditions A following condition continues over 10 minute after operating 5 minutes Cooling dry operation room temp indoor heat exchanger temp 5 C 23 F Heating indoor unit heat exchanger temp room temp 5 C 23 F Supposed Causes Connector in poor contact Thermistor defective Outdoor unit PCB defective Fou...

Page 91: ...witching output Any thermistor disconnected Check No 01 Check the thermistors Check No 14 Check the refrigerant line Refrigerant shortage Water mixed Stop valve Replace the defective thermistor s Correct the four way valve coil Reconnect the harness Replace the four way valve coil Replace the outdoor unit PCB main PCB Reconnect the thermistor s Refer to the refrigerant line check procedure Replace...

Page 92: ...s of soldered thermistor Tolerance resistance type A 5 Tolerance resistance type B 2 Multimeter Resistance range Thermistor ASSY Soldered thermistor Multimeter Thermistor temperature C Resistance kΩ C F Room temperature thermistor Room temperature thermistor 20 4 73 4 197 8 15 5 57 0 148 2 10 14 44 7 112 1 5 23 35 3 85 60 0 32 28 2 65 93 5 41 22 6 51 14 10 50 18 3 39 99 15 59 14 8 31 52 20 68 12 1...

Page 93: ...urn the power off and on again and check if the EV generates a latching sound 3 If the EV does not generate a latching sound in the step 2 above disconnect the connector and check the continuity using a multimeter 4 Check the continuity between the pins 5 1 5 2 5 3 5 4 for 5P connectors and 6 1 6 2 6 3 6 4 6 5 for 6P connectors If there is no continuity between the pins the EV coil is faulty 5 If ...

Page 94: ...ng Dry Defrost Not energized Heating energized Turn the power off and then on again S80 voltage at 208 230 VAC with compressor onΩ Fig 1 Disconnect the four way valve coil from the connector and check the continuity Four way valve coil resistance at 500 2300Ω Replace the outdoor unit PCB main PCB Replace the four way valve coil Be sure to turn off the power switch before connecting or disconnectin...

Page 95: ...1 4 when the fan motor is rotated 1 turn by hand When the fuse is melted check the outdoor fan motor for proper function If NG in step 2 Defective PCB Replace the outdoor unit PCB main PCB If NG in step 4 Defective Hall IC Replace the outdoor fan motor If OK in both steps 2 and 4 Replace the outdoor unit PCB main PCB Applicable for FTK X 09 12 18 24 Refrigerant system check Is the discharge pipe t...

Page 96: ...ection Clean the outdoor heat exchanger Check the outdoor temperature The outdoor temperature should be within the operation range Change the installation location or direction Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Caution YES YES YES NO NO NO Is the stop valve open Open the stop valve Replace the compressor Discharge pressure ch...

Page 97: ... 1 kΩ short circuit occurs on the main circuit Diagram Main Circuit Short Check for FTK X 09 12 YES NO NO YES Outdoor fan system is functioning Check the outdoor fan system Reconnect the connector Is the outdoor fan running Fan motor lead wire connector disconnected Go to Check No 16 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Caution ...

Page 98: ...Actuator Check DAMA SM 21 001 93 Service Diagnosis Diagram Main Circuit Short Check for FTK X 18 24 ...

Page 99: ...ector Follow the procedure below to measure resistance between the or terminal of the power module and the U V or W terminal of the compressor with a multimeter Evaluate the measurement results referring to the following table Diagram Power Module Check for FTK X 09 12 Diagram Power Module Check for FTK X 18 24 Positive terminal of digital multimeter Power module UVW Power module UVW Negative term...

Page 100: ... SM 21 001 Part 6 Trial Operation and Field Settings 95 1 Pump Down Operation 96 2 Forced Cooling Operation 97 3 Silicone Grease on Power Transistor Diode Bridge 98 Part 6 Trial Operation and Field Settings ...

Page 101: ... of the unit Details 1 Remove the valve caps from the liquid stop valve and the gas stop valve 2 Carry out forced cooling operation 3 After 5 to 10 minutes close the liquid stop valve with a hexagonal wrench 4 After 2 to 3 minutes close the gas stop valve and stop the forced cooling operation Refer to page 97 for forced cooling operation Gas stop valve Valve cap Close Liquid stop valve Service por...

Page 102: ...al and not in the 3 minute standby mode 2 The outdoor unit is not operating Protection functions have priority over all other functions during forced cooling operation Details With indoor unit ON OFF switch Press indoor unit ON OFF switch SW1 for at least 5 seconds The operation will start Forced cooling operation will stop automatically after about 15 minutes To stop the operation press indoor un...

Page 103: ...istor diode bridge Details 1 Wipe off the old silicone grease completely 2 Apply the silicone grease evenly See the illustrations below for examples of application 3 Tighten the screws of the power transistor diode bridge 4 Make sure that the heat radiation parts are firmly contacted to the radiation fin Note Smoke emission may be caused by bad heat radiation when the silicone grease is not approp...

Page 104: ...00 1 1 Indoor Unit 100 1 2 Outdoor Unit 103 2 Wiring Diagrams 107 2 1 Indoor Unit 107 2 2 Outdoor Unit 108 2 3 Printed Circuit Board Connector Wiring Diagram 110 2 4 Printed Circuit Board Connector Wiring Diagram 111 3 Operation Limit 113 Part 7 Appendix ...

Page 105: ...1 4CuT FIELD PIPING 1 4CuT 3 8CuT 0 3 8CuT SINGLE UNION JOINT REFRIGERANT FLOW FIELD PIPING FAN MOTOR HEAT EXCHANGER COOLING SINGLE UNION JOINT THERMISTOR ON HEAT EXCH CROSS FLOW FAN 3D128356 THERMISTOR ON HEAT EXCH CROSS FLOW FAN FAN MOTOR FIELD PIPING HEAT EXCHANGER 1 2 CuT FIELD PIPING HEADER 1 2 CuT REFRIGERANT FLOW COOLING 1 4 CuT 1 4 CuT 0 DISTRIBUTOR 3D128355 ...

Page 106: ...1 4 CuT CROSS FLOW FAN 0 HEAT EXCHANGER COOLING THERMISTOR ON HEAT EXCH REFRIGERANT FLOW FIELD PIPING FIELD PIPING 5 8 CuT DISTRIBUTOR FAN MOTOR 3D128357 1 4CuT 0 COOLING FIELD PIPING HEATING 3 8CuT REFRIGERANT FLOW FIELD PIPING THERMISTOR ON HEAT EXCH FAN MOTOR 1 4CuT SINGLE UNION JOINT HEAT EXCHANGER 3 8CuT SINGLE UNION JOINT CROSS FLOW FAN 3D128345 ...

Page 107: ...LD PIPING FAN MOTOR 1 4 CuT REFRIGERANT FLOW DISTRIBUTOR 1 2 CuT FIELD PIPING THERMISTOR ON HEAT EXCH 1 4 CuT COOLING 0 CROSS FLOW FAN HEATING HEADER 3D128349 HEATING FIELD PIPING 1 2 CuT 1 4 CuT FAN MOTOR THERMISTOR ON HEAT EXCH 0 FIELD PIPING 5 8 CuT DISTRIBUTOR HEAT EXCHANGER REFRIGERANT FLOW 1 4 CuT COOLING HEADER CROSS FLOW FAN 3D128352 ...

Page 108: ...Piping Diagrams DAMA SM 21 0012 103 Appendix 1 2 Outdoor Unit Cooling Only Model RK09A Model RK12A Note Dimension in inch Note Dimension in inch 3D128348 3D128350 ...

Page 109: ...DAMA SM 21 001 Piping Diagrams Appendix 104 Model RK18A Model RK24A Note Dimension in inch Note Dimension in inch 3D128351 3D128354 ...

Page 110: ...Piping Diagrams DAMA SM 21 0012 105 Appendix Heatpump Model RX09A Model RX12A Note Dimension in inch Note Dimension in inch 3D128321 3D128343 ...

Page 111: ...DAMA SM 21 001 Piping Diagrams Appendix 106 Model RX18A Model RX24A Note Dimension in inch Note Dimension in inch 3D128344 3D128347 ...

Page 112: ...Wiring Diagrams DAMA SM 21 0012 107 Appendix 2 Wiring Diagrams 2 1 Indoor Unit Cooling Only Model FTK09 12 18 24A FTX09 12 18 24A 3P599152C ...

Page 113: ...DAMA SM 21 001 Wiring Diagrams Appendix 108 2 2 Outdoor Unit Model RK09 12A Model RK18 24A 3P606152 3P606148 ...

Page 114: ...Wiring Diagrams DAMA SM 21 0012 109 Appendix Model RX09 12A Model RX18 24A 3P599133A 3P599144A ...

Page 115: ...CN_COIL Connector for indoor heat exchange thermistor R2T 4 CN_DCFN Connector for DC fan motor 5 LIVE NEUTRAL SIG Connector for terminal strip 6 EARTH Connector for terminal strip frame ground 7 F101 F1U F111 F2U Fuse 3 15 A 250 V 8 V101 R2V Varistor 1 CN_DSP1 Connector for control PCB A1P 2 SW201 BS1 Indoor unit ON OFF switch Forced cooling operation ON OFF switch Refer to page 97 for detail of f...

Page 116: ...opriate wiring diagram 1 S20 Connector for electronic expansion valve coil 2 S40 Connector for overload protector 3 S71 Connector for DC fan motor 4 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe temperature 5 HL1 HN1 S Connector for terminal strip 6 E1 E2 Terminals for earth wire 7 U V W Connector for compressor 8 FU2 F2U Fuse 3 15 A 250 V 9 FU3 F3U Fuse 2...

Page 117: ... S40 Connector for overload protector 3 S70 Connector for DC fan motor 4 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe temperature 5 HL1 HN1 S Connector for terminal strip 6 E1 E2 Terminals for earth wire 7 U V W Connector for compressor 8 FU1 F1U FU2 F2U Fuse 3 15 A 250 V 9 FU3 F3U Fuse 30 A 250 V 10 LED A LED for service monitor green 11 V1 R1V V2 R2V V3...

Page 118: ...M 21 0012 113 Appendix 3 Operation Limit Cooling Only Model RK A Heatpump Model RX A The use of your air conditioner outside the range of working temperature and humidity can result in serious failure 3P601788 1A 3P601788 1A ...

Page 119: ...ct yourself Improper installation can result in water or refrigerant leakage electrical shock fire or explosion z Use only those parts and accessories supplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage ele...