Related Manuals for Nobu NBL4-18IDU32
Summary of Contents for Nobu NBL4-18IDU32
- Page 1 Wall Mounted Air-Conditioning Unit MODELS NBL4-18IDU32 / NBL4-18ΟDU32 NBL4-24IDU32 / NBL4-24ΟDU32 Wall Mounted Air-Conditioning Unit Service Manual English...
- Page 2 Service Manual...
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Page 3: Table Of Contents
Service Manual Service Manual Table of Contents Part Ⅰ : Technical Information ...............1 1. Summary ........................1 ......................2 ......................3 2.2 Operation Characteristic Curve ..................6 2.3 Capacity Variation Ratio According to Temperature ............6 2.4 Cooling and Heating Data Sheet in Rated Frequency .............7 2.5 Noise Curve ........................8 3. - Page 4 Service Manual Service Manual 9. Maintenance ......................40 9.1 Malfunction Display of Indoor Unit ..................40 9.2 Procedure of Troubleshooting ..................42 9.3 Troubleshooting for Normal Malfunction .................60 10. Exploded View and Parts List ..............62 10.1 Indoor Unit ........................62 10.2 Outdoor Unit .........................66 11.
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Page 5: Part Ⅰ : Technical Information
Service Manual Service Manual Part Ⅰ : Technical Information 1. Summary Indoor Unit NBL4-18IDU32 NBL4-24IDU32 Outdoor Unit NBL4-24ΟDU32 NBL4-18ΟDU32 Remote Controller Technical Information Technical Information... - Page 6 Service Manual Service Manual Parameter Unit Value Model NBL4-18IDU32 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Cooling Capacity 5130 Heating Capacity 5280 Cooling Power Input 1580 Heating Power Input 1420 Cooling Current Input Heating Current Input...
- Page 7 Service Manual Service Manual Outdoor Unit Model NBL4-18ΟDU32 Compressor Model QXF-B141ZF030A Compressor Oil 68DA Compressor Type Rotary Compressor LRA. Compressor RLA Compressor Power Input 1410 1NT11L-6233/KSD115℃ /HPC Compressor Overload Protector 115/95 Throttling Method Electron expansion valve Set Temperature Range ºC 16~30 Cooling Operation Ambient Temperature ºC...
- Page 8 Service Manual Service Manual Parameter Unit Value Model NBL4-24IDU32 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Cooling Capacity 6450 Heating Capacity 6450 Cooling Power Input 1950 Heating Power Input 1735 Cooling Current Input Heating Current Input Rated Input 3100 Rated Current...
- Page 9 Service Manual Service Manual Outdoor Unit Model NBL4-24ΟDU32 Compressor Model QXFS-D23zX090A Compressor Oil FW68DA Compressor Type Rotary Compressor LRA. Compressor RLA 11.50 Compressor Power Input 2400 1NT11L-6233 or HPC115/95/ or Compressor Overload Protector KSD115ºC Throttling Method Electron expansion valve Set Temperature Range ºC 16~30 Cooling Operation Ambient Temperature...
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Page 10: Operation Characteristic Curve
Service Manual Service Manual 2.2 Operation Characteristic Curve Cooling Heating 220V Conditions 220V Indoor: DB27°C/WB19°C Outdoor: DB35°C/WB24°C Indoor air flow: High Pipe length: 5m 230V 230V 240V Conditions Indoor: DB20°C/WB15°C 240V Outdoor: DB7°C/WB6°C Indoor air flow: High Pipe length: 5m 10 20 30 40 50 60 70 80 90 100 Compressor speed (rps) Compressor speed (rps) -
Page 11: Cooling And Heating Data Sheet In Rated Frequency
Service Manual Service Manual 2.4 Cooling and Heating Data Sheet in Rated Frequency Cooling: Rated cooling Pressure of gas pipe Inlet and outlet pipe Compressor condition(°C) connecting indoor and temperature of heat Fan speed of Fan speed of Model frequency (DB/WB) outdoor unit exchanger... -
Page 12: Noise Curve
Service Manual Service Manual 2.5 Noise Curve Indoor side noise when blowing Outdoor side noise when blowing Super High Middle High Compressor frequency(Hz) Indoor fan motor rotating speed Technical Information Technical Information... -
Page 13: Outline Dimension Diagram
Service Manual Service Manual 3. Outline Dimension Diagram 3.1 Indoor Unit Φ55 Φ55 Φ70 Φ70 Unit:mm Model 1078 Technical Information Technical Information... -
Page 14: Outdoor Unit
Service Manual Service Manual 3.2 Outdoor Unit Unit:mm Unit:mm Technical Information Technical Information... -
Page 15: Refrigerant System Diagram
Service Manual Service Manual 4. Refrigerant System Diagram Outdoor unit Indoor unit Gas pipe side Valve 4-Way valve Di s charge Heat Suction Accumlator exchanger Compressor (evaporator) Heat exchanger Liquid pipe (condenser) side Valve Strainer Electric Strainer expand valve COOLING HEATING Connection pipe specification: Liquid pipe:1/4"... -
Page 16: Electrical Part
Brown COMP Compressor Blue Grounding wire YEGN Yellow/Green Black Violet Orange Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model. ● Indoor Unit NBL4-18IDU32, NBL4-24IDU32 600007000688 Technical Information Technical Information... - Page 17 Service Manual Service Manual ● Outdoor Unit NBL4-18ΟDU32, NBL4-24ΟDU32 63610000218 These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit. Technical Information Technical Information...
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Page 18: Pcb Printed Diagram
Service Manual Service Manual 5.2 PCB Printed Diagram Indoor Unit Top view Name Neutral wire interface of cold plasma(only for the mode with this function) Neutral wire interface of power supply Interface of indoor fan Interface of health function live wire Interface of up&down swing motor Interface of PG feedback... - Page 19 Service Manua Service Manual Outdoor Unit ● Top view Name Compressor three phase input interface Terminal of system high pressure protection Compressor overload protection terminal 4 Interface of temperature sensor Terminal of electronic expansion valve Terminal for low pressure protection Interface of fan 4-way valve terminal 2-way valve terminal...
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Page 20: Function And Control
Service Manual Service Manual Service Manual 6. Function and Control 6.1 Remote Controller Introduction Button name Function ON/OFF Turn on or turn off the unit TURBO Set turbo function MODE Set operation mode Set up&down swing status I FEEL Set I FEEL function TEMP Switch temperature displaying type on the unit’s display Set health function and air function... - Page 21 Service Manual Service Manual Under fixed-angle swing status, press button to adjust left&right swing angle circularly as below: Note: operate continuously left&right swing in 2 seconds, swing states will change according to above-mentioned order, or switch closed state and state. Setting up&down swing Under simple swing status, press button to adjust up&down swing status;...
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Page 22: Introduction Of Special Functions
Service Manual Service Manual Setting sleep function (11). In unit on status, press SLEEP button to turn on or turn off sleep function. When is displayed, sleep function is on. When is not displayed, sleep function is off. Notes: ①. Sleep function can not be set in auto and fan mode;... - Page 23 Service Manual Service Manual In winter, absence function can keep the indoor ambient temperature above 0ºC to avoid freezing. Note: Absence function is only available in heating mode and it will be exited when switching mode or setting sleep function. Lift the cover along the direction of arrow (as shown in Fig 1①).
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Page 24: Brief Description Of Modes And Functions
Service Manual Service Manual 6.4 Brief Description of Modes and Functions 1.Basic function of system (1)Cooling mode (1) Under this mode, fan and swing operates at setting status. Temperature setting range is 16~30 (2) During malfunction of outdoor unit or the unit is stopped because of protection, indoor unit keeps original operation status. (2)Drying mode (1) Under this mode, fan operates at low speed and swing operates at setting status. - Page 25 Service Manual Service Manual (8)I feel control mode After controller received I feel control signal and ambient temperature sent by remote controller, controller will work according to the ambient temperature sent by remote controller. (9)Compulsory defrosting function (1) Start up compulsory defrosting function Under ON status, set heating mode with remote controller and adjust the temperature to 16 C.
- Page 26 Service Manual Service Manual Outdoor Units 1. Input Parameter Compensation and Calibration (1) Check the ambient temperature compensation function Indoor ambient temperature compensation function. a. In cooling mode, the indoor ambient temperature participating in computing control = (T – ⊿ T indoor ambient temperature cooling indoor ambient temperature compensation...
- Page 27 Service Manual Service Manual 3. Special Functions Defrosting Control ① Conditions for starting defrosting After the time for defrosting is judged to be satisfied, if the temperature for defrosting is satisfied after detections for continuous 3minutes, the defrosting operation will start. ②...
- Page 28 Service Manual Service Manual 1. Starting estimation: After the compressor stopped working for 180s, if T >[T (the temperature of hysteresis is 2 )], the inner pipe frozen-preventing frequency-limited temperature machine is only allowed to start for operating, otherwise it should not be started, and should be stopped to treat according to the frozen- preventing protection: Clear the trouble under the mode of power turn-off / heating, and the protection times are not counted.
- Page 29 Service Manual Service Manual 1. Frequency limited If [T ]≤T <[T ] , you should limit the frequency raising of heating overload frequency-limited temperature inner pipe heating overload frequency reducing temperature at normal speed compressor. 2. Reducing frequency at normal speed and stopping machine: If T[ ]≤T <[T...
- Page 30 Service Manual Service Manual (6)Voltage sag protection After start the compressor, if the time of DC link Voltage sag [U ] is measured to be less than t Voltage sag protection time , Sagging protection voltage the machine should be stop at once, hand on the voltage sag trouble, reboot automatically after 30 minutes. (7)Communication fault When you have not received any correct signal from the inner machine in three minutes, the machine will stop for communication fault.
- Page 31 Service Manual Service Manual (12) Starting-up Failure Protection for Compressor Stop the compressor after its starting-up fails, restart it after 20s if the fault doesnt shows, and if they are all failing for the successive start 3 times, it shall be reported as Starting-up Failure, and then restart up it after 3 min. When it still not be able to operate through carry out the above process for 5 times, it is available if press ON/OFF.
- Page 32 Service Manual Service Manual 6. Electric Heating Function of Chassis (1) When T ≤0ºC, the electric heating of chassis will operate; outdoor amb. (2) When T >2ºC, the electric heating of chassis will stop operation; outdoor amb. (3)When 0ºC<T ≤2ºC, the electric heating of chassis will keep original status. outdoor amb.
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Page 33: Part Ⅱ : Installation And Maintenance
Service Manual Service Manual Part Ⅱ : Installation and Maintenance 7. Notes for Installation and Maintenance Safety Precautions: 10. If the power cord or connection wire is not long enough, please get the specialized power cord or connection wire Important! from the manufacture or distributor. - Page 34 Service Manual Service Manual Safety Precautions for Installing and Relocating the Unit: To ensure safety, please be mindful of the following precautions. Warnings 1. When installing or relocating the unit, be sure to keep the refrigerant circuit free from air or substances other than the specified refrigerant.
- Page 35 Service Manual Service Manual Safety Operation of Flammable Refrigerant Qualification requirement for installation and maintenance man ●All the work men who are engaging in the refrigeration system should bear the valid certification awarded by the authoritative organization and the qualification for dealing with the refrigeration system recognized by this industry. If it needs other technician to maintain and repair the appliance, they should be supervised by the person who bears the qualification for using the flammable refrigerant.
- Page 36 Service Manual Service Manual Main Tools for Installation and Maintenance 1. Level meter, measuring tape 2. Screw driver 3. Impact drill, drill head, electric drill 4. Electroprobe 5. Universal meter 6. Torque wrench, open-end wrench, inner hexagon spanner 7. Electronic leakage detector 8.
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Page 37: Installation
Service Manual Service Manual 8. Installation 8.1 Installation Dimension Diagram Space to the wall Space to the wall At least 15cm At least 15cm Drainage pipe Installation and Maintenance Installation and Maintenance... - Page 38 Service Manual Service Manual Installation procedures Start installation Preparation before installation Read the requirements select installation Prepare tools for electric connection location Select indoor unit Select outdoor unit installation location installation location Install wall-mounting Install the support of outdoor unit frame, drill wall holes (select it according to the actual situation) Connect pipes of indoor...
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Page 39: Installation Parts-Checking
Service Manual Service Manual 8.4 Requirements for electric connection 8.2 Installation Parts-checking 1. Safety Precaution Name Name (1) Must follow the electric safety regulations when installing Indoor unit Sealing gum the unit. Outdoor unit Wrapping tape (2) According to the local safety regulations, use qualified Support of outdoor power supply circuit and air switch. - Page 40 Service Manual Service Manual screw fixing holes on the wall. 4. Outlet Pipe (2) Drill the screw fixing holes on the wall with impact drill (the (1) The pipe can be led out in the direction of right, rear right, specification of drill head should be the same as the plastic left or rear left.(As show in Fig.3) expansion particle) and then fill the plastic expansion particles...
- Page 41 Service Manual Service Manual (4) Put wiring cover back and then tighten the screw. (5) Close the panel. Drain hose Outlet pipe Note: (1) All wires of indoor unit and outdoor unit should be connected by a professional. Tape Drain hose (2) If the length of power connection wire is insufficient, please Outlet Fig.9...
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Page 42: Installation Of Outdoor Unit
Service Manual Service Manual 4. Connect Indoor and Outdoor Pipes Outdoor Indoor (1) Remove the screw on the handle and valve cover of outdoor Fig.17 Wall pipe Sealing gum unit and then remove the handle and valve cover.(As show in Fig.21) Upper hook (2) Remove the screw cap of valve and aim the pipe joint at the... -
Page 43: Vacuum Pumping And Leak Detection
Service Manual Service Manual 2. Leakage Detection The drain hos (1) With leakage detector: can't raise upwards Check if there is leakage with leakage detector. (2) With soap water: Wall If leakage detector is not available, please use soap water for leakage detection. -
Page 44: Maintenance
Service Manual Service Manual 9. Maintenance 9.1 Malfunction Display of Indoor Unit 1. Malfunction display requirement When there are several malfunctions, they will be displayed circularly. 2. Malfunction display method (1) Hardware malfunction: immediate display; refer to “malfunction display table”; (2) Operation state: immediate display;... - Page 45 Service Manual Service Manual ●Discharging method (1) remove the inverter cover(Outdoor Unit) Inverter cover P.C.board (Soldered surface) (2)As shown below,connect the discharge resistance(approx.100Ω20W)or plug of the sold ering iron to voltage between + - terminals of the electrolytic capacitor on PC Board for 30s, and then peformedischarging. NOTE: A large-capacity electrolytic capacitor is used in the outdoor unit controller(inverter).Therefore,if the power supply is turned off,charge(charging voltage DC280V to 380V)remains and disc harging takes a lot of time..
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Page 46: Procedure Of Troubleshooting
Service Manual Service Manual 9.2 Procedure of Troubleshooting Indoor unit (1) Malfunction of Temperature Sensor F1, F2 Main detection points: ● Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted? ● Is there short circuit due to trip-over of the parts? ●... - Page 47 Service Manual Service Manual (2) Malfunction of Blocked Protection of IDU Fan Motor H6 Main detection points: ● SmoothlyIs the control terminal of PG motor connected tightly? ● SmoothlyIs the feedback interface of PG motor connected tightly? ● The fan motor cant operate? ●...
- Page 48 Service Manual Service Manual (3) Malfunction of Protection of Jumper Cap C5 Main detection points: ● Is there jumper cap on the mainboard? ● Is the jumper cap inserted correctly and tightly? ● The jumper is broken? ● The motor is broken? ●...
- Page 49 Service Manual Service Manual (4) Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor U8 Main detection points: ● Instant energization afte de-energization while the capacitordischarges slowly? ● The zero-cross detectioncircuit of the mainboard is defined abnormal? Malfunction diagnosis process: Start Turn power off for 1minute,the turn...
- Page 50 Service Manual Service Manual (5) Communication malfunction (E6) Troubleshooting for E6 malfunction Disconnect power and check if the connection wire of indoor and outdoor units and the built-in wire of electric box are correctly connected. Connect the wire properly according Is malfunction Correct connection? to the wiring...
- Page 51 Service Manual Service Manual (6) Malfunction of detecting plate(WIFI) JF Start check if the connection wire are correctly connected detecting Replace the plate with the same model Is malfunction eliminated Replace the mainboard with the same model The end Installation and Maintenance Installation and Maintenance...
- Page 52 Service Manual Service Manual Outdoot Unit (1) Malfunction of Desynchronizing of Compressor (H7) Main check point: Whether the system pressure is too high? Whether the electronic expansion valve can work normally? Whether the radiation for the unit is in good condition? Malfunction diagnosis process: Desynchronizing malfunction occurs after de-energizing...
- Page 53 Service Manual Service Manual Desynchronizing malfunction occurs during operation process Check whether Whether the outdoor fan can Replace fan capacitor the fan terminal is operate normally? connected well Improve the radiation circumstances for the Whether the radiation for the unit (such as clean heat unit is in good condition? Replace outdoor fan exchanger, improve...
- Page 54 Service Manual Service Manual (2) Malfunction of Temperature Sensor (F3/F4/F5) Main check point: Whether the temperature sensor is damaged? Whether the terminal of temperature sensor is loose or not connected? Whether the main board is damaged? Malfunction diagnosis process: Start the troubleshooting for temperature sensor Check the connection between temperature sensor and wiring...
- Page 55 Service Manual Service Manual (3) Malfunction of Overload Protection of Compressor (H3) and Discharge High-temperature Protection of Compressor (E4) Main check point: Whether the electronic expansion valve is connected well and whether its damaged? Whether the refrigerant is leaking? Whether the overload protector is damaged? Malfunction diagnosis process: Start Whether the overload protector is...
- Page 56 Service Manual Service Manual (4) Charging Malfunction of Capacitor (PU) Main check point: Whether input power is normal? Main board is damaged. Malfunction diagnosis process: Energize and turn on the unit; wait for 1 min Measure the voltage at both ends of big electrolytic capacitor with the DC notch of universal meter There is malfunction for the...
- Page 57 Service Manual Service Manual (5) Malfunction of Overload Protection (E8) Main check point: Whether the tube temperature sensor is normal? Whether the outdoor ambient temperature is within the normal range? Whether indoor fan and outdoor fan can operate normally? Whether radiation environment inside or outside the unit is good? Malfunction diagnosis process: Start Replace the tube temperature...
- Page 58 Service Manual Service Manual (6) Malfunction of IPM Protection (H5) Main check point: Whether input voltage is within the normal range? Whether wires of compressor are connected reliably, tightly or correctly? Whether the resistance of compressor coil is normal? Whether the insulation between compressor coil and copper pipe is in good condition? Whether the unit is overloading? Whether the radiation for the unit is in good condition? Whether the volume of charged refrigerant is proper?
- Page 59 Service Manual Service Manual (7) Malfunction of PFC Protection (HC) Main check point: Whether power supply is normal? Malfunction diagnosis process: Start Check whether power supply is normal Turn on the unit again after the power is Is power abnormal? resumed Replace main board of outdoor unit...
- Page 60 Service Manual Service Manual (8) Malfunction of Communication (E6) Main check point: Check whether connection wires between indoor unit and outdoor unit and wiring inside the unit are connected well? Check the main board of indoor unit or main board of outdoor unit is damaged? Malfunction diagnosis process: Communication malfunction De-energize the unit and then...
- Page 61 Service Manual Service Manual (9) Malfunction of Failure Start-up of Compressor (LC) Main check point: Whether the compressor wires are connected correctly? Whether the stop time for compressor is enough? Whether compressor is damaged? Whether the refrigerant-charging volume is superfluous? Malfunction diagnosis process: Energize and turn on the unit...
- Page 62 Service Manual Service Manual (10) Malfunction of Overcurrent Protection E5 Main detection points: ● Is the supply voltage unstable with big fluctuation? ● Is the supply voltage too low with overload? ● Hardware trouble? Malfunction diagnosis process: Start Normal fluctuation should be within 10 % Is malfunction Is the supply voltage unstable of the rated voltage on the nameplate...
- Page 63 Service Manual Service Manual (11) Other Malfunction 1.IPM module temperature sensor is open-circuited (P7) Hardware of main board is damaged. Please replace main board. 2.Overheating protection of IPM module (P8) ① Poor radiation because the module radiator is dirty; ② IPM module is damaged; ③...
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Page 64: Troubleshooting For Normal Malfunction
Service Manual Service Manual 9.3 Troubleshooting for Normal Malfunction 1. Air Conditioner Cant be Started Up Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Confirm whether its due to power failure. If yes, No power supply, or poor After energization, operation indicator isnt bright wait for power recovery. - Page 65 Service Manual Service Manual 4. ODU Fan Motor Cant Operate Possible causes Discriminating method (air conditioner status) Troubleshooting Connect wires according to wiring diagram to Wrong wire connection, or poor Check the wiring status according to circuit make sure all wiring terminals are connected connection diagram firmly...
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Page 66: Exploded View And Parts List
Service Manual Service Manual 10. Exploded View and Parts List 10.1 Indoor Unit The component picture is only for reference; please refer to the actual product. Installation and Maintenance Installation and Maintenance... - Page 67 Service Manual Service Manual Part Code Description NBL4-18IDU32 Decorative Strip 20192662 Front Panel 20000300075T Display Board 30565260 Filter Sub-Assy 11122089 Decorative Board (Left) 20192662 Front Case 2002248401 Guide Louver 1051276501 Axile Bush 10542036 Air Louver 1051276501 Helicoid tongue 26112512 Left Axile Bush...
- Page 68 Service Manual Service Manual The component picture is only for reference; please refer to the actual product. Installation and Maintenance Installation and Maintenance...
- Page 69 Service Manual Service Manual Part Code Description NBL4-24IDU32 Front Panel Assy 20000300076T Filter Sub-Assy 11012007 Screw Cover 2425245301 Front Case Assy 00000200043 Air Louver(Manual) 10512737 Helicoid Tongue 26112513 Left Axile Bush 10512037 Rear Case assy 22202570 Rubber Plug (Water Tray) 76712012 Ring of Bearing 26152025...
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Page 70: Outdoor Unit
Service Manual Service Manual 10.2 Outdoor Unit The component picture is only for reference; please refer to the actual product. Installation and Maintenance Installation and Maintenance... - Page 71 Service Manual Service Manual Part Code Description NBL4-18ΟDU32 Product Code CB476W00200 Front Grill 22413046 Cabinet 01433034P Axial Flow Fan 10333014 Chassis Sub-assy 01205176P Drainage Joint 26113009 Compressor and Fittings 00103919G 4-Way Valve Assy 030152000146 Valve Support Sub-Assy 01713115P Cut off Valve Sub-Assy 030057000072 Cut off Valve Sub-Assy 07133774...
- Page 72 Service Manual Service Manual The component picture is only for reference; please refer to the actual product. Installation and Maintenance Installation and Maintenance...
- Page 73 Service Manual Service Manual Part Code Description NBL4-24ΟDU32 22415010 Front Grill 01535013P Front Panel 06123401 Drainage Connecter 01205816P Chassis Sub-assy 06813401 Drainage hole Cap 00103920 4300040087 Magnet Coil 03073274 4-Way Valve Assy 07133844 Cut off Valve Assy 1/2 07133843 Cut off Valve Sub-Assy 01705046P Valve support assy 0130509001P...
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Page 74: Removal Procedure
Service Manual Service Manual 11. Removal Procedure Caution: discharge the refrigerant completely before removal. 11.1 Removal Procedure of Indoor Unit 1.Remove fifter assy Front panel Open the front panel. Push the left and rightfilters to make them break away from thegroove on the front case. - Page 75 Service Manual Service Manual 4.Remove electric box cover 2 Remove the screws on the electric box cover 2 and detecting plate(WIFI), then remove the electric box cover 2 and detecting plate(WIFI). Electric box cover2 Screw Note:The position of detection Detecting plate(WIFI) Electric box cover board(WIFI) may be different for different models.
- Page 76 Service Manual Service Manual Step Procedure 7.Remove vertical louver Loosen the connection clasps between vertical louver and bottom case to remove vertion louver. Swing motor Screw off the screws that are locking the swing motor and take the motor off. 8.Remove electric box assy Loosen the connection clasps between shield cover of electric box sub-assy and...
- Page 77 Service Manual Service Manual Step Procedure Rotate the electric box assy. Twist off the screws Rotate the electric box assy. Twist offthe that are locking the wire clip and loosen the Screws screwsthat are locking the wire clip and power cord. Remove the wiring terminal of loosen the power cord.
- Page 78 Service Manual Service Manual Step Procedure Adjust the position of conncetion pipe on evaporator up wards to remove it. 10.Remove motor and cross flow blade Remove the screws fixing motor clamp and then remove the motor clamp. ① Remove the screws at the connection place of cross flow blade and motor;...
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Page 79: Removal Procedure Of Outdoor Unit
Service Manual Service Manual 11.2 Removal Procedure of Outdoor Unit Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. Step Procedure 1. Remove big handle Remove the screw fixing big handle;... - Page 80 Service Manual Service Manual Step Procedure 4.Remove cabinet Remove the screws fixing cabinet and then remove the cabinet. Cabinet Screw 5.Remove right side plate and rear grill Remove the screws fixing right side plate Right side plate and then remove the right side plate. Screw Screw Remove the screws and then remove the...
- Page 81 Service Manual Service Manual Step Procedure 6.Remove lef side plate Remove the screws fixing left side plate and then remove the letf side plate. Left side plate Screw 7.Remove axial flow blade Axial flow blade Remove the nut fixing axial flow blade and then remove the axial flow blade.
- Page 82 Service Manual Service Manual Step Procedure 9.Remove motor Remove the screws fixing motor and then remove the motor. Screw Motor 10.Remove motor support Motor support Remove the screws fixing motor support and then remove the motor support. Screw 11.Remove 4-way valve assy Unsolder the spot weld of 4-way valve assy, compressor and condenser, and then remove the 4-way valve assy .
- Page 83 Service Manual Service Manual Step Procedure 12.Remove compressor Remove 3 foot nuts on compressor, and then remove the compressor. Foot nuts Note: Protect the ports of discharge pipe and suction pipe to avoid foreign objects to enter it. Compressor 13.Remove clapboard Remove the screws fixing clapboard and Screw then remove the clapboard.
- Page 84 Service Manual Service Manual Step Procedure Condenser 15.Remove condenser Remove one screw fixing the condenser, then remove the condenser. Screw Installation and Maintenance Installation and Maintenance...
- Page 85 Service Manual Service Manual Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. Steps Procedure 1. Remove top panel Twist off the screws used for fixing the handle and v alve cover , pull the handle and v alve cover up ward to remove it.
- Page 86 Service Manual Service Manual Steps Procedure Remove the screws connecting the outer case with motor support, isolation plate and chassis; lift the outer case upwards; loosen the clasps of outer case with right side plate and left side plate, and then remove the outer case.
- Page 87 Service Manual Service Manual Steps Procedure 4. Remove axial flow blade Remove the nut fixing axial flow blade and then remove the blade. axial flow fan motor support Remove the 6 screws fixing the motor and then remove the motor. Remove the 2 screws connecting the motor support and chassis, and then loosen the stopper to remove the motor support.
- Page 88 Service Manual Service Manual Steps Procedure 6. Remove the soundproof sponge Tear off the sticking stripe and then remove the soundproof sponge. soundproof sponge 7. Remove isolation plate Remove the 2 screws connecting the isolation plate and condenser side plate; remove the 3 screws connecting the isolation plate and chassis, and then remove the isolation plate.
- Page 89 Service Manual Service Manual Steps Procedure 9. Remove compressor compressor Remove the 3 foot nuts fixing compressor and then lift the compressor upwards to remove the compressor and damping cushion. Note: Keep the ports of discharge pipe and suction pipe from foreign objects.
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Page 90: Appendix
Service Manual Service Manual Appendix: Appendix 1: Reference Sheet of Celsius and Fahrenheit Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1.8+32 Set temperature Fahrenheit Fahrenheit Fahrenheit display Fahrenheit display Fahrenheit display Fahrenheit Celsius( Celsius( Celsius( temperature temperature temperature 60.8 69/70 69.8 78/79... -
Page 91: Appendix 3: Pipe Expanding Method
Service Manual Service Manual Appendix 3: Pipe Expanding Method Pipe Note: Pipe cutter Improper pipe expanding is the main cause of refrigerant leakage.Please expand the pipe according to the following steps: Leaning Uneven Burr A:Cut the pip ● Confirm the pipe length according to the distance of indoor unit and outdoor unit. ●... -
Page 92: Appendix 4: List Of Resistance For Temperature Sensor
Service Manual Service Manual Appendix 4: List of Resistance for Temperature Sensor Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor (15K) Temp( C) Resistance(kΩ) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 138.1 18.75 3.848 1.071 128.6 17.93 3.711 1.039 121.6 17.14... - Page 93 Service Manual Service Manual Resistance Table of Tube Temperature Sensors for Indoor and Outdoor (20K) Temp( C) Resistance(kΩ) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 181.4 25.01 5.13 1.427 171.4 23.9 4.948 1.386 162.1 22.85 4.773 1.346 153.3 21.85 4.605 1.307 20.9 4.443...
- Page 94 Service Manual Service Manual Resistance Table of Discharge Temperature Sensor for Outdoor (50K) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) 853.5 18.34 4.75 799.8 93.42 17.65 4.61 89.07 16.99 4.47 703.8 84.95 16.36 4.33 660.8 81.05 15.75 4.20 620.8 77.35...
- Page 96 Wall Mounted Air-Conditioning Unit...