Table of Contents
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SERVICE MANUAL
Inverter Wall Mounted Single Split
MODELS
Cooling Only
FTKB09AXVJU
FTKB12AXVJU
FTKB18AXVJU
FTKB24AXVJU
FTKN09AXVJU
FTKN12AXVJU
FTKN18AXVJU
FTKN24AXVJU
Heatpump
FTXB09AXVJU
FTXB12AXVJU
FTXB18AXVJU
FTXB24AXVJU
FTXN09AXVJU
FTXN12AXVJU
FTXN18AXVJU
FTXN24AXVJU
RKB09AXVJU
RKB12AXVJU
RKB18AXVJU
RKB24AXVJU
RKN09AXVJU
RKN12AXVJU
RKN18AXVJU
RKN24AXVJU
RXB09AXVJU
RXB12AXVJU
RXB18AXVJU
RXB24AXVJU
RXN09AXVJU
RXN12AXVJU
RXN18AXVJU
RXN24AXVJU
dd
SM-5WM-Y-NA-B1
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Table of Contents
Related Manuals for Daikin FTKB09AXVJU
Summary of Contents for Daikin FTKB09AXVJU
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Page 1: Service Manual
SERVICE MANUAL Inverter Wall Mounted Single Split MODELS Cooling Only FTKB09AXVJU RKB09AXVJU FTKB12AXVJU RKB12AXVJU FTKB18AXVJU RKB18AXVJU FTKB24AXVJU RKB24AXVJU FTKN09AXVJU RKN09AXVJU FTKN12AXVJU RKN12AXVJU FTKN18AXVJU RKN18AXVJU FTKN24AXVJU RKN24AXVJU Heatpump FTXB09AXVJU RXB09AXVJU FTXB12AXVJU RXB12AXVJU FTXB18AXVJU RXB18AXVJU FTXB24AXVJU RXB24AXVJU FTXN09AXVJU RXN09AXVJU FTXN12AXVJU RXN12AXVJU FTXN18AXVJU... -
Page 3: Table Of Contents
Table of Contents Table of Contents 1.0 Inverter Single Split ......................1 1.1 Product line-up ......................1 1.2 Printed Circuit board (PCB) connector wiring diagram ..........3 1.3 Piping Length & Elevation ..................10 1.4 Outline & Dimension ....................11 1.5 Engineering Data ....................15 2.0 Function &... - Page 4 Table of Contents 4.0 Wiring Connection ......................61 5.0 Refrigerant Diagram ....................65 6.0 Appendix A ........................67...
- Page 5 Table of Contents Safety Cautions Caution and warnings • Be sure to read the following safety cautions before conducting repair work. • The caution items are classified into “ Warning” and “ Caution”. The “ Warning” items are especially important since they can lead to death or serious injury if they are not followed closely. The “...
- Page 6 Table of Contents Caution Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.
- Page 7 Table of Contents Cautions Regarding Products after Repair Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools can cause an electrical shock, excessive heat generation or fire.
- Page 8 Table of Contents Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site, to prevent electrical shocks. Do not install the equipment in a place where there is a possibility of combustible gas leaks.
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Page 9: Inverter Single Split
Inverter Single Split 1.0 Inverter Single Split 1.1 Product line-up 1.1.1 Indoor Unit Classification Nomenclature FTKB09/12AXVJU FTKN09/12AXVJU FTKB18/24AXVJU FTKN18/24AXVJU FTXB09/12AXVJU FTXN09/12AXVJU FTXB18/24AXVJU FTXN18/24AXVJU... - Page 10 Inverter Single Split 1.1.2 Outdoor Unit Classification Nomenclature RKB09/12AXVJU RKN09/12AXVJU RKB18/24AXVJU RKN18/24AXVJU RXB09/12AXVJU RXN09/12AXVJU RXB18/24AXVJU RXN18/24AXVJU...
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Page 11: Printed Circuit Board (Pcb) Connector Wiring Diagram
Inverter Single Split 1.2 Printed Circuit Board (PCB) connector wiring diagram 1.2.1 Indoor PCB: FTKB09/12AXVJU, FTKN09/12AXVJU, FTXB09/12AXVJU, FTXN09/12AXVJU 1.2.1.1 Main PCB: W_2_03D ; W_2_03E ; W_2_03E_M Item Indication on PCB Description Connector for fan motor Connector for swing motor Connector for fan motor feedback Fuse Varistor Connector for wired controller... - Page 12 Inverter Single Split 1.2.1.2 Signal board Item Indication on PCB Description Operational LED Connector for Control PCB Remote controller signal receiver Operation ON/OFF switch Buzzer Applicable Model : Applicable Model : FTKB09/12AXVJU FTKN09/12AXVJU FTXB09/12AXVJU FTXN09/12AXVJU...
- Page 13 Inverter Single Split 1.2.2 Indoor PCB: FTKB18/24AXVJU, FTKN18/24AXVJU, FTXB18/24AXVJU, FTXN18/24AXVJU 1.2.2.1 Main PCB: W_2_04A ; W_2_04B Item Indication on PCB Description Connector for fan motor Connector for swing motor Connector for fan motor feedback Fuse Varistor Connector for wired controller Connector for signal receiver PCB...
- Page 14 Inverter Single Split 1.2.2.2 Signal board Item Indication on PCB Description Operational LED Connector for Control PCB Remote controller signal receiver Operation ON/OFF switch Buzzer Applicable Model : Applicable Model : FTKB18/24AXVJU FTKN18/24AXVJU FTXB18/24AXVJU FTXN18/24AXVJU...
- Page 15 Inverter Single Split 1.2.3 Outdoor PCB: RKB09/12AXVJU, RKN09/12AXVJU, RXB09/12AXVJU, RXN09/12AXVJU 1.2.3.1 Main PCB Item Indication on PCB Description Connector for S10 on main PCB HL1, HN1, S Connector for terminal board E1, E2 Terminal for earth wire HL2, HN2 Connector for HL3 HN3 on main PCB HL4, HN4 Connector for S12 on main PCB Fuse (3.15A, 250V)
- Page 16 Inverter Single Split 1.2.4 Outdoor PCB: RKB18/24AXVJU, RKN18/24AXVJU, RXB18/24AXVJU, RXN18/24AXVJU 1.2.4.1 Filter PCB Item Indication on PCB Description Connector for indoor PCB Fuse (20A) V2, V3 Varistor...
- Page 17 Inverter Single Split 1.2.4.2 Main PCB Item Indication on PCB Description Connector for filter PCB Connector for electronic expansion valve coil Connector for overload protector Connector for fan motor Connector for four way valve coil Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe) HL3, HN3 Connector for filter PCB FU1, FU2...
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Page 18: Piping Length & Elevation
Inverter Single Split 1.3 Piping Length & Elevation Max. total piping Max. height Pre-charge for o Additional charge Model length, L difference, E to piping length [oz/ft (g/m)] [ft,(m)] [ft,(m)] [ft,(m)] RK(X)B09AX 65.6 (20) 32.8 (10) 25 (7.6) 0.21 (20) RK(X)N09AX RK(X)B12AX 65.6 (20) -
Page 19: Outline & Dimension
Inverter Single Split 1.4 Outline & Dimension 1.4.1 Indoor Unit Model: FTK(X)B09/12AX, FTK(X)N09/12AX FOR ILLUSTRATIVE PURPOSES ONLY THE MARK SHOWS PIPING DIRECTION REAR REAR LEFT RIGHT TOP VIEW NAME PLATE SIGNAL RECEIVER TERMINAL BLOCK WITH EARTH INDOOR UNIT TERMINAL ON/OFF SWITCH SIDE VIEW BOTTOM BOTTOM... - Page 20 Inverter Single Split Model: FTK(X)B18/24AX, FTK(X)N18/24AX FOR ILLUSTRATIVE PURPOSES ONLY THE MARK SHOWS PIPING DIRECTION REAR REAR LEFT RIGHT TOP VIEW NAME PLATE SIGNAL RECEIVER TERMINAL BLOCK WITH EARTH INDOOR UNIT TERMINAL ON/OFF SWITCH SIDE VIEW BOTTOM BOTTOM ROOM TEMPERATURE THERMISTOR LOUVER (INSIDE) FRONT GRILLE FIXED SCREWS...
- Page 21 Inverter Single Split 1.4.2 Outdoor Unit Model: RK(X)B09/12AX, RK(X)N09/12AX FOR ILLUSTRATIVE PURPOSES ONLY Dimension Model 21-5/8 22-15/16 7/16 10-3/4 9/16 18-1/2 3-3/4 09/12 (550) (658) (51) (11) (273) (16) (14) (470) (96) Dimension Model 3-11/16 3-11/16 2-3/8 9/16 5-1/4 5/16 11-3/4 09/12 (93)
- Page 22 Inverter Single Split Model: RK(X)B18/24AX, RK(X)N18/24AX FOR ILLUSTRATIVE PURPOSES ONLY Dimension Model 33-11/16 24-3/4 12-15/16 20-1/2 7-1/16 1-13/16 4-7/16 23-3/4 4-15/16 (855) (628) (328) (520) (179) (46) (101) (113) (603) (126) 33-11/16 28-3/4 12-15/16 20-1/2 7-1/16 1-13/16 4-7/16 23-3/4 4-15/16 (855) (730) (328)
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Page 23: Engineering Data
Inverter Single Split 1.5 Engineering Data 1.5.1 Cooling Only Indoor unit FTKB09AXVJU FTKB12AXVJU FTKB18AXVJU FTKB24AXVJU Model Outdoor unit RKB09AXVJU RKB12AXVJU RKB18AXVJU RKB24AXVJU Btu/h 8800 (4400 - 10200) 11000 (4400 - 13000) 18000 (4300 - 21200) 21200 (6000 - 22200) Nominal Cooling Capacity (Min. ~ Max.) - Page 24 Inverter Single Split 1.5.2 Heatpump Indoor unit FTXB09AXVJU FTXB12AXVJU FTXB18AXVJU FTXB24AXVJU Model Outdoor unit RXB09AXVJU RXB12AXVJU RXB18AXVJU RXB24AXVJU Btu/h 8800 (4400 - 10200) 11000 (4400 - 13000) 18000 (4300 - 21200) 21200 (6000 - 22200) Nominal Cooling Capacity (Min. ~ Max.) 2570 (1300 - 3000) 3220 (1300 - 3800) 5270 (1260 - 6200)
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Page 25: Function & Control
Algorithm & Control 2.0 Function & Control 2.1 Temperature Control The temperature is detected by the room temperature thermistor (either on the unit or on the wired panel). The set temperature can be selected either through remote controller or wired controller by user. Target temperature Room thermistor temperature Set temperature... -
Page 26: Dry Mode
Algorithm & Control 2.2.2 Heating Mode: When Ts > Tr - 1.0°C (1.8°F) • Compressor, Indoor Fan and Outdoor Fan ON. When Ts ≤ Tr - 1.5°C (2.7°F) • Compressor and Outdoor Fan OFF. Indoor Fan speed will change to Super Low. Tr = Room Temperature Ts = Set Temperature When heating load is too small, and the room temperature is still rising above compressor cut off point, compressor will stop. -
Page 27: Fan Mode
Algorithm & Control 2.4 Fan Mode • Compressor and Outdoor Fan OFF. Indoor Fan remains ON. • Only High, Medium and Low fan speeds are allowed. • When changing cool mode to fan mode, the compressor will stop and outdoor fan stops based on fan OFF control. -
Page 28: Sleep Mode
Algorithm & Control 2.7 Sleep Mode SLEEP Mode can be activated through the remote controller to keep the thermal comfort while sleeping. SLEEP Mode continues operation at the target temperature for the first hour, then automatically raises the target temperature slightly in case of cooling, or lowers it slightly in case of heating. This prevents excessive cooling in summer and excessive heating in winter to ensure comfortable sleeping conditions, and also saves electricity. -
Page 29: Powerful Function
Algorithm & Control 2.10 Powerful function • Press (for FTK(X)B-AX models) or “TURBO” for (FTK(X)N-AX models) for powerful mode. • When POWERFUL/TURBO button is pressed, the fan speed will run at maximum speed for 20 minutes. • Press again to deactivate the function. • Available in HEAT and COOL modes only. Operation Mode Fan Speed Target Temperature COOL Current Tap + A rpm Current set temperature -4°C (7.2°F) HEAT Current Tap + B rpm Current set temperature -6°C (10.8°F) Class 09/12: A = 100 rpm... -
Page 30: Thermistors In Rk(X)B,Rk(X)N
Outdoor air 2. Used for overall current protection & preheating operation control. Heat sink 1. Used for capturing heat sink temperature. (Applicable for Daikin controller) 1. Used for Electronic Expansion Valve (EXV) & suction pipe (SH) protection control Suction pipe... -
Page 31: Minimum Off Time Control
Algorithm & Control 2.13 Minimum Off Time Control To prevent frequent compressor ON/OFF & to allow pressure equalization • The compressor will be on 3 minutes stand-by after turning OFF before it is allowed to turn ON. • Outdoor fan OFF delay to improve pressure equalization & to prevent refrigerant from entering into evaporator. -
Page 32: Four Way Valve Control
Algorithm & Control Applicable for PCB W_2_04A & W_2_04B (For all class 18/24) Cut off the jumper J_AUTO to disable the Auto Restart or Auto Random Restart function 2.16 Four Way Valve Control Change over switching is only carried out during operation. OFF delayed is applied when the coil switches from ON to OFF Operating mode 4-way valve is... -
Page 33: Rotation Regulating Functions
Algorithm & Control 2.18 Rotation Regulating Functions Upper limit rotation Command rotation Limit rotation Target rotation Starting rotation Lower limit rotation ∆T Defrost* * Defrost control for heat pump model only 2.18.1 Starting Rotation Starting Control To avoid excessive oil discharge from compressor or to promote oil lubrication during startup. To prevent liquid flood back to the compressor. -
Page 34: Defrost Cycle
Algorithm & Control 2.18.3 Limit Rotation Determine from • Upper limit rotation A minimum value was determined among the upper limits rotation, i.e. protection controls. • Lower limit rotation A maximum value was determined among the lower limits rotation, i.e. protection controls. Generally, compressor rotation is controlled within 5 zones: stop, drop, keep, up and reset subjected to a particular operating temperature/current/pressure. -
Page 35: Indoor Coil Freeze Prevention
Algorithm & Control 09 class 12 class 18 class 24 class A (minute) 20 - 25 20 - 25 (°C) 2 - 20 2 - 20 6 - 30 6 - 30 (°F) 35.6 – 68.0 35.6 – 68.0 42.8 – 86.0 42.8 –... -
Page 36: Discharge Pipe Temperature Control
Algorithm & Control 2.22 Discharge Pipe Temperature Control Used as a measure of the compressor’s internal temperature. Compressor frequency is control to keep this temperature from going up further when it rises above a certain level. Discharge temperature Stop zone 110°C / 230°F 102°C / 215.6°F Drop zone... -
Page 37: Overall Frequency Control
Algorithm & Control 2.24 Overall Frequency Control The compressor frequency is determined according to the difference between the room thermistor temperature and the target temperature. Dropping function Input current control, etc. Upper limit function Upper limit function FMAX Compressor protection function Command frequency Limit frequency Skip control... - Page 38 Algorithm & Control 2.24.1 Initial Frequency When starting the compressor, the frequency is initialized according to the ∆D value of the indoor unit. <∆D signal: Indoor frequency commands> The difference between the room thermistor temperature and the target temperature is recognized as the ∆D signal and is used for frequency command. Temperature ∆D Temperature ∆D Temperature ∆D Temperature ∆D difference signal difference signal difference signal difference signal -2.0°C (-3.6°F) *OFF 0°C (0°F) 2.0°C (3.6°F) 4.0°C (7.2°F) -1.5°C (-2.7°F) 0.5°C (0.9°F) 2.5°C (4.5°F) 4.5°C (8.1°F) -1.0°C (-1.8°F) 1.0°C (1.8°F)
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Page 39: Service Diagnosis
Service Diagnosis 3.0 Service Diagnosis 3.1 Error Indication from Indoor 3.1.1 Indoor model FTK(X)N09/12/18/24AX • LED display will either be ON during operation or blinking (blue color) when any error occur as in below table. • The blinking pattern does not indicate error details •... - Page 40 Service Diagnosis 3.1.2 Indoor model FTK(X)B09/12/18/24AX • LED display will either change color under different running condition or blinking (blue color) when any error occur as in below table. • The blinking pattern does not indicate error details. • The error details needs to be retrieved from remote controller in error code form. Operation / Fault Indication COOL/HEAT/TIMER (BLUE/RED/VIOLET)
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Page 41: Error Code Retrieved By Handset
Service Diagnosis 3.2 Error Code retrieved by remote controller 3.2.1 Remote controller model BRC52A & BRC52B Mode button ON/OFF button ON TIMER OFF TIMER ON TIMER CANCEL OFF TIMER CANCEL CANCEL button CANCEL button button button Operating Guide 1. Hold down ON TIMER CANCEL or OFF TIMER CANCEL for 5 seconds until ‘‘ ’’ indication flashes on the remote controller temperature display section. -
Page 42: Error Code Description For Inverter
Service Diagnosis 3.3 Error code description for Inverter RK(X)B09/12/18/24AX ERROR CODE ERROR DESCRIPTION RK(X)N09/12/18/24AX NORMAL INDOOR PCB ABNORMALITY ANTIFREEZE PROTECTION OR HIGH PRESSURE CONTROL INDOOR FAN MOTOR ABNORMALITY INDOOR HEAT EXCHANGER THERMISTOR ABNORMALITY INDOOR ROOM THERMISTOR ABNORMALITY OUTDOOR PCB ABNORMALITY COMPRESSOR OVERLOAD COMPRESSOR LOCK/START-UP ABNORMALITY OUTDOOR FAN MOTOR LOCK... - Page 43 Service Diagnosis Description INDOOR PCB ABNORMALITY Possible Root 1. Faulty indoor PCB. cause 2. Faulty connector connection at indoor. Troubleshooting Turn off unit. Check indoor PCB connector conditions (including PCB to terminal block and all PCB wire connector). Any sign Connect correctly and of loose or operate again.
- Page 44 Service Diagnosis Description ANTIFREEZE PROTECTION OR HIGH PRESSURE CONTROL Possible Root 1. Indoor air filter, heat exchanger block due to dust accumulation. cause 2. Indoor air short circuit. 3. Indoor coil thermistor faulty. 4. Indoor PCB faulty. 5. Fan blower dirty. Troubleshooting Check indoor air flow. Any air short Provide sufficient air passage.
- Page 45 Service Diagnosis Description INDOOR FAN MOTOR ABNORMALITY Possible Root 1. Indoor fan motor winding short, or the motor lead wire broken. cause 2. Indoor PCB faulty. Troubleshooting Turn off power supply and rotate fan by hand. Change fan motor. Does it rotate? Check fan motor connector condition.
- Page 46 Service Diagnosis Description INDOOR ROOM THERMISTOR ABNORMALITY Possible Root 1. Thermistor, connector faulty. cause 2. Indoor PCB faulty. Troubleshooting Check the thermistor connector condition. Correct the connection Normal? Check thermistor resistance value. # Refer thermistor resistance table.(Page 67, item 6.1) Replace thermistor Normal? Replace PCB.
- Page 47 Service Diagnosis Description OUTDOOR PCB ABNORMALITY Possible Root 1. Micro Controller program run-away due to external factor such as Noise, Momentary voltage cause drop, Momentary power failure. 2. Damage of EEPROM. 3. Faulty outdoor unit PCB. 4. Broken hardness between PCB. Troubleshooting Turn on the power again.
- Page 48 Service Diagnosis Description COMPRESSOR OVERLOAD Possible Root 1. Refrigerant Shortage. cause 2. 4 way valve malfunction. 3. Stop valve malfunction. 4. Outdoor unit PCB defective. 5. Water mixed in refrigerant. 6. Electronic expansion valve defective. 7. Disconnection of discharge pipe thermistor. 8.
- Page 49 Service Diagnosis Description COMPRESSOR OVERLOAD Possible Root 1. Refrigerant Shortage. cause 2. 4 way valve malfunction. 3. Electronic expansion valve defective. 4. Outdoor unit PCB defective. 5. Water mixed in refrigerant. Troubleshooting Turn off unit. Disconnect compressor wire hardness (U.V.W) and check winding. Resistance Change compressor.
- Page 50 Service Diagnosis Description COMPRESSOR LOCK/START-UP ABNORMALITY Possible Root 1. Compressor locked. cause 2. Compressor harness disconnect. Troubleshooting Turn off power. Disconnect harnesses U, V and Check with Inverter analyzer. Correct power supply or Normal? replace outdoor unit PCB. Turn off power and reconnect harnesses.
- Page 51 Service Diagnosis Description OUTDOOR FAN MOTOR LOCK Possible Root 1. Fan motor breakdown. cause 2. Harness or connector disconnected between fan motor and PCB or in poor contact. 3. Foreign matter stuck in fan. 4. Defective outdoor unit PCB. Troubleshooting Fan motor Turn off power and connector...
- Page 52 Service Diagnosis Description AC INPUT OVER CURRENT Possible Root 1. Over current due to compressor failure. cause 2. Over current due to defective outdoor unit PCB. 3. Over current due to defective power transistor. 4. Over current due to short-circuit. Troubleshooting Measure the input current.
- Page 53 Service Diagnosis Description 4 WAY VALVE ABNORMALITY Possible Root 1. Thermistor defective. cause 2. 4 way valve defective. 3. Outdoor PCB defective. 4. Insufficient gas. 5. Foreign substance mixed in refrigerant. 6. Stop valve defective. 7. Disconnect of 4 way valve coil. Troubleshooting Four way valve Correct the four way valve...
- Page 54 Service Diagnosis Description DISCHARGE PIPE OVERHEAT Possible Root 1. Refrigerant shortage. cause 2. Four way valve malfunctioning. 3. Discharge pipe thermistor defective. 4. Outdoor PCB defective. 5. Water mixed in the local piping. 6. EXV defective. 7. Stop Valve defective. Troubleshooting Malfunction Replace the defective...
- Page 55 Service Diagnosis Description HEAT EXCHANGER OVERHEAT Possible Root 1. The installation space is not large enough. cause 2. Faulty outdoor fan motor. 3. Faulty EXV. 4. Faulty outdoor heat exchanger thermistor. 5. Faulty stop valve. 6. Dirty heat exchanger. 7. Unit overcharge. 8.
- Page 56 Service Diagnosis H0 (Class 18/24) Description COMPRESSOR SENSOR SYSTEM ABNORMAL Possible Root 1. Broken and disconnected harness. cause 2. Outdoor unit PCB defective. 3. Defective compressor. Troubleshooting Check reactor connection. Connect back reactor. Any abnormal? # Disconnect the reactor wire and measure Check reactor resistance.
- Page 57 Service Diagnosis H0 (Class 09/12) Description COMPRESSOR SENSOR SYSTEM ABNORMAL Possible Root 1. Broken and disconnected harness. cause 2. Outdoor unit PCB defective. Troubleshooting Check the harness S30. Is the harness Replace the harness. broken? Turn off the power and turn it on again.
- Page 58 Service Diagnosis H6 (Class 09/12) Description POSITION SENSOR ABNORMAL (COMPRESSOR) Possible Root 1. Compressor relay cable disconnected. cause 2. Compressor itself defective. 3. Outdoor PCB defective. 4. Stop valve closed. 5. Input voltage out of specification. Troubleshooting Check for short circuit. Replace the outdoor unit Normal? PCB, outdoor unit fan.
- Page 59 Service Diagnosis H6 (Class 18/24) Description POSITION SENSOR ABNORMAL (COMPRESSOR) Possible Root 1. Compressor relay cable disconnected. cause 2. Compressor itself defective. 3. Outdoor PCB defective. 4. Stop valve closed. 5. Input voltage out of specification Troubleshooting Turn off the power. Check the power supply voltage. Correct the power supply.
- Page 60 Service Diagnosis Description AC CURRENT SENSOR ABNORMALITY Possible Root 1. Internal wiring broken. cause 2. Outdoor unit PCB defective. Troubleshooting Check compressor harness connection. Reconnect it correctly. Connection correct? Restart the system and check connector between main board and IPM board. Does it connect Reconnect it properly.
- Page 61 Service Diagnosis H9, J3, J6, P4 Description Thermistor or related abnormality OUTDOOR AIR THERMISTOR ABNORMALITY COMPRESSOR DISCHARGE PIPE THERMISTOR ABNORMALITY OUTDOOR HEAT EXCHANGER THERMISTOR ABNORMALITY P4: HEAT SINK THERMISTOR ABNORMALITY Possible Root 1. Disconnection of the connector for the thermistor. cause 2.
- Page 62 Service Diagnosis Description ELECTRICAL BOX TEMPERATURE RISE (COMPRESSOR OFF) Possible Root 1. Fin temperature rise due to defective outdoor unit fan. cause 2. Fin temperature rise due to short circuit. 3. Fin thermistor defective. 4. Connector in poor contact. 5. Outdoor unit PCB defective. Troubleshooting Turn off the unit and turn on back after 20 mins.
- Page 63 Service Diagnosis Description Heat sink overheat Possible Root 1. Fin temperature rise due to short circuit. cause 2. Fin temperature rise due to defective outdoor unit fan. 3. Fin thermistor defective. 4. Connector in poor contact. 5. Outdoor unit PCB defective. 6.
- Page 64 Service Diagnosis Description IPM ABNORMALITY Possible Root 1. Over current due to defective power transistor. cause 2. Over current due to wrong internal wiring. 3. Over current due to abnormal supply voltage. 4. Over current due to defective PCB. 5. Error detection due to defective PCB. 6.
- Page 65 Service Diagnosis Description INSUFFICIENT GAS Possible Root 1. Disconnection of the discharge pipe thermistor, indoor or outdoor heat exchanger,room or cause outdoor temperature thermistor. 2. Closed stop valve. 3. Refrigerant shortage (refrigerant leakage). 4. Poor compression performance of compressor. 5. Defective electronic expansion valve. Troubleshooting Check stop valve.
- Page 66 Service Diagnosis Description DC VOLTAGE OUT OF RANGE Possible Root 1. Power supply voltage is not as specified. cause 2. Defective DC voltage detection circuit. 3. Defective over-voltage detection circuit. 4. Defective PAM control part. 5. Disconnection of compressor harness 6. Short circuit inside the fan motor winding. 7.
- Page 67 Service Diagnosis Description COMMUNICATION ABNORMALITY Possible Root 1. Faulty outdoor unit PCB. cause 2. Faulty indoor unit PCB. 3. Indoor unit – outdoor unit signal transmission error due to wiring error. 4. Indoor unit – outdoor unit signal transmission error due to disturbed power supply waveform. 5.
- Page 68 Service Diagnosis Description INSTALLATION ABNORMALITY Possible Root 1. Wrong models interconnected. cause 2. Wrong indoor unit PCB mounted. 3. Indoor unit PCB defective. 4. Wrong outdoor unit PCB mounted or defective. Troubleshooting Check the combination of the indoor and outdoor unit. Match the compatible models.
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Page 69: Wiring Connection
Wiring Connection 4.0 Wiring Connection Model: FTKB09/12AX-RKB09/12AX ; FTKN09/12AX-RKN09/12AX 2 SIG POWER SUPPLY 208/230V/1Ph/60Hz... - Page 70 Wiring Connection Model: FTKB18/24AX-RKB18/24AX ; FTKN18/24AX-RKN18/24AX NOTATION: FAN MOTOR AIR SWING MOTOR TH1: ROOM SENSOR ----- FIELD SUPPLY WIRING POWER SUPPLY 208/230V/1Ph/60Hz...
- Page 71 Wiring Connection Model: FTXB09/12AX-RXB09/12AX ; FTXN09/12AX-RXN09/12AX POWER SUPPLY 208/230V/1Ph/60Hz...
- Page 72 Wiring Connection Model: FTXB18/24AX-RXB18/24AX ; FTXN18/24AX-RXN18/24AX NOTATION: FAN MOTOR AIR SWING MOTOR TH1: ROOM SENSOR ----- FIELD SUPPLY WIRING POWER SUPPLY 208/230V/1Ph/60Hz...
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Page 73: Refrigerant Diagram
Refrigeramt Diagram 5.0 Refrigerant Diagram Model: FTKB09/12AX - RKB09/12AX , FTKN09/12AX - RKN09/12AX Model: FTKB18/24AX - RKB18/24AX , FTKN18/24AX - RKN18/24AX... - Page 74 Refrigerant Diagram Model: FTXB09/12AX - RXB09/12AX , FTXN09/12AX - RXN09/12AX Model: FTXB18/24AX - RXB18/24AX , FTXN18/24AX - RXN18/24AX...
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Page 75: Appendix A
Refrigeramt Diagram 6.0 Appendix A 6.1 Thermistor resistance checking procedures Remove the connectors of thermistors at PCB and measure resistance of each thermistor using tester as shown below. Tester Resistance range Resistance value refer to Resistance table below. Class 09/12/18/24 Indoor Wall Mounted 10 kΩ (Table 2) - Page 76 Refrigerant Diagram Table 2: Resistance R25 = 10 kΩ Rmin Rnom Rmax Rmin Rnom Rmax t°C t°F t°C t°F (kΩ) (kΩ) (kΩ) (kΩ) (kΩ) (kΩ) 14.0 44.20 45.30 46.50 15.8 42.10 43.20 44.30 105.8 5.47 5.56 5.64 17.6 40.20 41.20 42.20 107.6 5.28...
- Page 77 Refrigeramt Diagram 6.2 Electronic Expansion Valve (EXV) checking procedures a. Check if the EXV connector is correctly connected to PCB. b. Turn power off and on again, and check if EXV generates a latching sound. c. If the EXV does not generate a latching sound in above step b., disconnect connector and check continuity using a multimeter.
- Page 78 Refrigerant Diagram 6.3.2 Class 18/24 Turn power off and then on again. *Four way valve coil Not Energized Start heating operation. Heating: Energized S80 voltage at 220-240VAC with Replace outdoor PCB. compressor on? *Refer Figure 1 below. Disconnect four way valve coil from connector and check the continuity.
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Page 79: Installation Condition Check
Refrigeramt Diagram 6.5 Rotation pulse check on outdoor unit PCB Make sure that the voltage of 320 ± 30 V is applied. 1. Set operation off and power off. Disconnect the connector S71. 2. Check that the voltage between the pins 4 & 7 is 320 VDC. 3. -
Page 80: Outdoor Fan System Check
Refrigerant Diagram 6.7 Outdoor fan system check DC motor Check the outdoor fan system. Refer to Fan motor lead wire connector Appendix A Rotation pulse Outdoor fan running? disconnected? check on outdoor unit PCB. Refer Page 71, item 6.5 Outdoor fan system is Reconnect the connector. - Page 81 Refrigeramt Diagram – Multimeter 6.9 Power supply waveforms check procedures Measure the power supply waveform between No. 1(Live) and No. 2(Neutral) on the terminal board, and check the waveform disturbance with oscilloscope. • Check if the power supply waveform is a sine wave (Fig. 1). • Check if there is waveform disturbance near the zero cross (sections circled in Fig.
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Page 82: Trial Operation And Field Settings
Refrigerant Diagram 6.10 Trial Operation and Field Settings 6.10.1 Tips for Servicing 6.10.1.1 Pump Down Operation In order to protect the environment, be sure to conduct pump down operation when relocating or disposing of the unit. <Details> 1. Remove the valve caps from the liquid stop valve and the gas stop valve. 2. - Page 83 Refrigeramt Diagram 6.10.2 Trial Operation 1. Measure the supply voltage and make sure that it falls within the specified range. 2. Trial operation should be carried out in either cooling or heating operation. 3. Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts, such as louver movement, are working properly. • The air conditioner requires a small amount of power in standby mode. If the system is not to be used for some time after installation, shut off the circuit breaker to eliminate unnecessary power consumption.
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Questions and answers
HI. I **** trying to find some clear and simple instructions/information on how to properly use the remote control for my RXB24AXVJU mini split. Thank you.
To use the remote control for the Daikin FTKB09AXVJU mini split:
1. Power On/Off: Use the power button to turn the unit on or off.
2. Mode Selection: Press the mode button to cycle through modes—Cooling, Dry, Fan, Auto.
3. Temperature Setting: Use the up/down buttons to adjust the set temperature.
4. Fan Speed: Press the fan button to select the desired fan speed (e.g., low, medium, high, auto).
5. Swing Control: Use the swing button to adjust or activate the airflow direction.
6. Special Functions:
- Sleep Mode: Press the sleep button to enable energy-saving operation during sleep.
- Eco+ Mode: Press Eco+ for enhanced energy savings.
- Powerful Mode: Press Powerful for rapid cooling or heating.
- Quiet Mode: Press Quiet to reduce operational noise.
7. Timer Settings: Use the timer buttons to set automatic on/off times.
The remote uses 2 AAA batteries and operates via infrared with a maximum range of about 10 meters. Point the remote directly at the indoor unit.
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How many btu have ?
The BTU rating of the Daikin FTKB09AXVJU is 8,800 BTU/h.
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RXB24AXVJU OUTDOOR FAN NOT COMING ON
If the outdoor fan of a Daikin FTKB09AXVJU unit is not coming on, possible issues include:
1. Malfunctioning outdoor fan motor – check and replace if necessary.
2. Disconnected connector or fan motor lead wires – reconnect them.
3. Defective outdoor unit PCB – check and replace if needed.
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are mounting screws provided for installation plate? If not what type of screws should be used to secure bracket to the wall?
Proper testing pressure requirements
part number for discharge pipe thermistor, outdoor thermistor, and out door heat exchanger for a BXB18AXVJU UNIT