Related Manuals for Nobu NBL4-09IDU32
Summary of Contents for Nobu NBL4-09IDU32
- Page 1 Wall Mounted Air-Conditioning Unit NBL4-09IDU32 / NBL4-09ΟDU32 MODELS NBL4-12IDU32 / NBL4-12ΟDU32 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 ......................2 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 ........................7 3. - Page 4 Service Manual Service Manual 9. Maintenance ......................74 9.1 Error Code List .......................74 9.2 Procedure of Troubleshooting ..................82 9.3 Troubleshooting for Normal Malfunction .................97 10. Exploded View and Parts List ..............99 10.1 Indoor Unit ........................99 10.2 Outdoor Unit .......................109 11. Removal Procedure ..................
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Page 5: Part Ⅰ : Technical Information
Service Manual Service Manual Part Ⅰ : Technical Information 1. Summary Indoor Unit NBL4-09IDU32, NBL4-12IDU32 Outdoor Unit NBL4-09ΟDU32 NBL4-12ΟDU32 Remote Controller Technical Information Technical Information... - Page 6 Service Manual Service Manual Parameter Unit Value Model NBL4-09IDU32 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Cooling Capacity(Min~Max) 2600(500~3350) Heating Capacity(Min~Max) 2800(500~3500) Cooling Power Input(Min~Max) 805(160~1400) Heating Power Input(Min~Max) 755(200~1500) Cooling Current Input Heating Current Input...
- Page 7 Service Manual Service Manual Outdoor Unit Model NBL4-12IDU32 Compressor Model QXF-B096zE190A Compressor Oil FW68DA Compressor Type Rotary Compressor LRA. 20.00 Compressor RLA 4.21 Compressor Power Input 1NT11L-6233 HPC115/95U1 Compressor Overload Protector KSD115ºC Throttling Method Capillary Set Temperature Range ºC 16~30 Cooling Operation Ambient Temperature ºC -15~43...
- Page 8 Service Manual Service Manual Parameter Unit Value Model NBL4-12IDU32 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Cooling Capacity(Min~Max) 3500(800~3700) Heating Capacity(Min~Max) 3670(900~380) Cooling Power Input(Min~Max) 1085(220~1400) Heating Power Input(Min~Max) 990(220~1500) Cooling Current Input Heating Current Input Rated Input 1500 Rated Current...
- Page 9 Service Manual Service Manual Outdoor Unit Model NBL4-12ΟDU32 Compressor Model QXF-B096zE190A Compressor Oil FW68DA Compressor Type Rotary Compressor LRA. Compressor RLA 4.21 Compressor Power Input Compressor Overload Protector 1NT11L-6233 HPC115/95U1 KSD115ºC Throttling Method Capillary Set Temperature Range ºC 16~30 Cooling Operation Ambient Temperature ºC -15~43 Range...
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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: Pressure of gas pipe Inlet and outlet pipe Rated cooling Compressor connecting indoor and temperature of heat Fan speed of Fan speed of condition(°C) (DB/WB) Model revolution outdoor unit exchanger... -
Page 12: Outline Dimension Diagram
Service Manual Service Manual 3. Outline Dimension Diagram 3.1 Indoor Unit 123.5 179.5 168.5 159.5 Φ55 Φ55 Φ55 Φ55 124.7 83.2 Model Unit:mm Technical Information Technical Information... -
Page 13: Outdoor Unit
Service Manual Service Manual 3.2 Outdoor Unit NBL4-09ΟDU32 Unit:mm NBL4-12ΟDU32 Unit:mm Technical Information Technical Information... -
Page 14: Refrigerant System Diagram
Service Manual Service Manual 4. Refrigerant System Diagram 09/12K Outdoor unit Indoor unit Gas pipe side Valve 4-Way valve Di s charge Heat Accumlator Suction exchanger Compressor (evaporator) Heat exchanger Liquid pipe (condenser) side Valve Strainer Capillary Strainer COOLING HEATING Liquid pipe:1/4"... -
Page 15: 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 NBL4-09IDU32, NBL4-12IDU32 600007000688 Technical Information Technical Information... - Page 16 Service Manual Service Manual ● Outdoor Unit NBL4-09ΟDU32 600007000687 NBL4-12ΟDU32 600007000763 Technical Information Technical Information...
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Page 17: Pcb Printed Diagram
Service Manual Service Manual 5.2 PCB Printed Diagram Indoor Unit ● Top view Name Interface of communication wire for indoor unit and outdoor unit 2 Interface of live wire Interface of health function neutral wire 4 Interface of neutral wire 5 Interface of fan 6 Interface of health function live wire 7 Jumper cap... - Page 18 Service Manual Service Manual Outdoor Unit 09/12K ● Top view Name Compressor wiring terminal Reactor wiring terminal Outdoor fan wiring terminal Terminal of chassis electric heater Terminal of compressor electric heater Terminal of 4-way valve Grounding wire Communication wire Neutral wire Live wire Terminal of electronic expansion valve...
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Page 19: Function And Control
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 20 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 21: 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 22 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 23: Brief Description Of Modes And Functions
Service Manual Service Manual 6.5 Brief Description of Modes and Functions Indoor Unit ● 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 24 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)Entry condition for compulsory defrosting function When turn on the unit under heating ode and set temperature is 16 C (or 16.5 C by remote controller), press “+, -, +, -, +, -”...
- Page 25 Service Manual Service Manual Outdoor Unit ● 1. Cooling mode: Working condition and process of cooling mode: ① When Tindoor ambient temperature≥Tpreset, unit enters into cooling mode. Indoor fan, outdoor fan and compressor start operation. Indoor fan operates according to set fan speed. ②...
- Page 26 Service Manual Service Manual 7. Auto mode Auto mode is determined by controller of IDU. See IDU logic for details. 8. 8 C heating Set temperature is 8 C. Display board of IDU displays 8 C. Under this mode, “Cold air prevention” function is shielded. If compressor is operating under this mode, fan speed will adjust according to auto fan speed;...
- Page 27 Service Manual Technical Information...
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Page 28: 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 29 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 30 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 31 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 32: Installation
Service Manual Service Manual 8. Installation 8.1 Installation Dimension Diagram Space to the wall At least 15cm At least 15cm Space to the wall Drainage pipe Installation and Maintenance Installation and Maintenance... - Page 33 Service Manual Service Manual 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 Fix outdoor unit...
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Page 34: 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 35 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 36 Service Manual Service Manual (4) Put wiring cover back and then tighten the screw. Drain hose (5) Close the panel. Outlet pipe Note: (1) All wires of indoor unit and outdoor unit should be Tape connected by a professional. Drain hose Outlet Fig.9 pipe...
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Page 37: Installation Of Outdoor Unit
Service Manual Service Manual 4. Connect Indoor and Outdoor Pipes Indoor Outdoor Fig.17 (1) Remove the screw on the right handle of outdoor unit and Wall pipe Sealing gum then remove the handle.(As show in Fig.21) Upper hook (2) Remove the screw cap of valve and aim the pipe joint at the bellmouth of pipe.(As show in Fig.22) Liquid pipe Pipe joint... -
Page 38: Vacuum Pumping And Leak Detection
Service Manual Service Manual 2. Leakage Detection (1) With leakage detector: The drain hos can't raise Check if there is leakage with leakage detector. upwards (2) With soap water: Wall If leakage detector is not available, please use soap water for leakage detection. -
Page 39: Maintenance
Service Manual Service Manual 9. Maintenance 9.1 Error Code List Note:All models is except 18K Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes... - Page 40 Service Manual Service Manual Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code...
- Page 41 Service Manual Service Manual Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code...
- Page 42 Service Manual Service Manual Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code...
- Page 43 Service Manual Service Manual Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code...
- Page 44 Service Manual Service Manual Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display (during display status and during Malfunction blinking, ON 0.5s and OFF Dual-8 A/C status Possible Causes blinking, ON 0.5s and OFF Name 0.5s) Code...
- Page 45 Service Manual Service Manual If malfunction occurs,corresponding code will display and the unit will resume normal until protection or malfunction disappears. Installation and Maintenance Installation and Maintenance...
- Page 46 Service Manual Service Manual Analysis or processing of some of the malfunction display: 1. Compressor discharge protection Possible causes: shortage of refrigerant; blockage of air filter; poor ventilation or air flow short pass for condenser; the system has noncondensing gas (such as air, water etc.); blockage of capillary assy (including filter); leakage inside four-way valve causes incorrect operation;...
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Page 47: 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 48 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 49 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 50 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 51 Service Manual Service Manual (5) 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 Outdoor unit: (1) Capacitor charge fault (Fault with outdoor unit) (AP1 below refers to the outdoor control panel) Main Check Points: ●Use AC voltmeter to check if the voltage between terminal L and N on the wiring board is within 210VAC~240VAC. ●Is the reactor (L) correctly connected? Is the connection loose or fallen? Is the reactor (L) damaged? Fault diagnosis process: Turn on the unit...
- Page 53 Service Manual Service Manual (2) IPM Protection, Out-of-step Fault, Compressor Phase Overcurrent (AP1 below refers to the outdoor control panel) Main check points: ●Is the connection between control panel AP1 and compressor COMP secure? Loose? Is the connection in correct order? ●Is the voltage input of the machine within normal range? (Use AC voltmeter to measure the voltage between terminal L and N on the wiring board XT) ●Is the compressor coil resistance normal? Is the insulation of compressor coil against the copper tube in good condition?
- Page 54 Service Manual Service Manual Energize and switch on Use AC voltmeter If the voltage Check the supply to measure the IPM protection between terminal L voltage and voltage between occurs after the and N on wiring machine has run for terminal L and N restore it to board XT is within...
- Page 55 Service Manual Service Manual (3) High temperature and overload protection diagnosis (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: ●Is outdoor ambient temperature in normal range? ●Are the outdoor and indoor fans operating normally? ●Is the heat dissipation environment inside and outside the unit good? Fault diagnosis process: Overheat and high temperature protection...
- Page 56 Service Manual Service Manual (4) Start-up failure (following AP1 for outdoor unit control board) Mainly detect: ●Whether the compressor wiring is connected correct? ●Is compressor broken? ●Is time for compressor stopping enough? Fault diagnosis process: Power on the unit Restart it up after Is stop time of the compressor 3 minutes longer than 3 minutes?
- Page 57 Service Manual Service Manual (5) Out of step diagnosis for the compressor (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: ●Is the system pressure too high? ●Is the input voltage too low? Fault diagnosis process: Out of step occurs in Out of step occurs once the operation...
- Page 58 Service Manual Service Manual (6) Overload and air exhaust malfunction diagnosis (following AP1 for outdoor unit control board) Mainly detect: ●Is the PMV connected well or not? Is PMV damaged? ●Is refrigerant leaked? Fault diagnosis process: 20 minutes after the complete unit is powered off Is the terminal FA for the...
- Page 59 Service Manual Service Manual (7) Power factor correct or (PFC) fault (a fault of outdoor unit) (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: ●Check if the reactor (L) of the outdoor unit and the PFC capacitor are broken Fault diagnosis process: Start Check wiring of the...
- Page 60 Service Manual Service Manual (8) Communication malfunction: (following AP1 for outdoor unit control board) Mainly detect: ●Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged? ●Detect the indoor and outdoor units connection wire and indoor and outdoor units inside wiring is connect well or not, if is there any damage? Fault diagnosis process: Start...
- Page 61 Service Manual Service Manual (9) Malfunction of Overcurrent Protection 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...
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Page 62: 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 63 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 64: 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 65 Service Manual Service Manual Part Code Description NBL4-09IDU32 NBL4-12IDU32 Front Panel 20022479S 20022475S Display Board 30565231 30565231 Front Case Assy 20022495 20022489 Helicoid Tongue 26112508 26112436 Left Axile Bush 10512037 10512037 Rear Case assy 20162010 00000100093 Drainage Hose 0523001408 05230014...
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Page 66: Outdoor Unit
Service Manual Service Manual 10.2 Outdoor Unit NBL4-09ΟDU32 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 NBL4-09ΟDU32 Electric Box Assy 100002002657 Electric Box 20113034 Main Board 300027000249 Reactor 43130184 Terminal Board 42010313 Wire Clamp 71010103 Front Grill 22413049 Front Panel 01533034P Axial Flow Fan 10333004 Chassis Sub-assy 017000000134P Brushless DC Motor 1501308507 Top Cover Sub-Assy 01253073...
- Page 68 Service Manual Service Manual NBL4-12ΟDU32 21 22 23 24 25 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 NBL4-12ΟDU32 Left Side Plate 01303200P Fan Motor 1501308507 Motor Support 01703136 Condenser Assy 011002000359 Top Cover Sub-Assy 01253081 Rear Grill 01475014 Clapboard Sub-Assy 01233180 Compressor and Fittings 00103925G Compressor Gasket 76710287 4-Way Valve Assy 030152000016 Big Handle 2623343106...
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Page 70: Removal Procedure
Service Manual Service Manual 11. Removal Procedure Caution: discharge the refrigerant 09/12K completely before removal. 11.1 Removal Procedure of Indoor Unit Step Procedure 1. Remove filter assembly Front panel Open the front panel. Push the left filter and right filter until they are separate from the groove on the front panel. - Page 71 Service Manual Service Manual Step Procedure 4. Remove detecting plate and electric box cover2 Remove the screws fixing detecting plate and remove detecting plate. Detecting plate Remove the screws fixing electric box cober2 and remove electric box2. 5. Remove front case sub-assy Screws Remove the screws fixing front case.
- Page 72 Service Manual Service Manual Step Procedure 7. Remove electric box assy Screw Loosen the connection clasps between shield cover of electric box sub-assy and Clasps electric box, and then remove the shield cover of electric box sub-assy. Electric box Shield cover of electric box sub-assy Indoor tube temperature...
- Page 73 Service Manual Service Manual Step Procedure Instruction: Some wiring terminal of this product is with lock catch and other devices. circlip The pulling method is as below: holder 1.Remove the soft sheath for some terminals at first, hold the circlip and then pull out the terminals.
- Page 74 Service Manual Service Manual Step Procedure 9. Remove motor and cross flow blade Remove the screws fixing motor clamp Screws and then remove the motor clamp. Motor clamp Cross flow Remove the screws at the connection Screw Motor place of cross flow blade and motor; lift Holder the motor and cross flow blade upwards sub-assy...
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Page 75: Removal Procedure Of Outdoor Unit
Service Manual Service Manual 11.2 Removal Procedure of Outdoor Unit NBL4-09ΟDU32 Step Procedure 1. Remove big handle Right side plate the big handle upwards to make the clasp of big handle separate from the groove of right side plate, and then remove the big handle. Screw Big handle 2. - Page 76 Service Manual Service Manual Procedure Step 4. Remove the front cover Screws Screw off the screws that are locking the front cover. Then take it off. Screws Screws Front cover Screws 5. Remove axial flow blade Remove the nut fixing axial flow blade and then remove the axial flow blade.
- Page 77 Service Manual Service Manual Step Procedure 6. Remove protective grille and right side plate Protective Remove the screws 1 fixing protective grille grille and then remove the protective grille. Screws 2 Screws 1 Right side plate Right side plate Remove the screws 2 fixing right side plate and then remove the right side plate.
- Page 78 Service Manual Service Manual Step Procedure 8. 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 . 4-way valve assy Note: When unsoldering the spot weld, wrap the 4-way valve with wet cloth completely to avoid damaging the valve due to high temperature.
- Page 79 Service Manual Service Manual Step Procedure Clapboard 11. Remove clapboard sub-assy Loosen the screws of the Clapboard Sub- Assy . The Clapboard Sub-Assy has a hook on thelower side. Lift and pull the Clapboard Sub- Assyto remove. 12. Remove Compressor Remove the 2 screws fixing the gas valve.
- Page 80 Service Manual Service Manual NBL4-12ΟDU32 Steps Procedure 1.Remove big handle Before disassamble Remove the screws fixing handle、valve big handle cover and then remove them. valve cover 2. Remove top cover top cover Remove the screws fixing top panel and then remove the top panel. Installation and Maintenance Installation and Maintenance...
- Page 81 Service Manual Service Manual Step Procedure 3.Remove grille 、protective grille and front panel Remove connection screws between the front grille and the front panel. Then remove the front grille. Remove connection screws connecting the front protective panel with the chassis and the motor support, and grille then remove the front panel.
- Page 82 Service Manual Service Manual Step Procedure 6.Remove motor and motor support Remove the screws fixing motor and then remove the motor. Remove the screws fixing motor support and then remove the motor support. motor support motor 7.Remove electric box assy Remove the screws fixing electric box assy;...
- Page 83 Service Manual Service Manual Step Procedure 9.Remove 4-way valve assy and capillary sub-assy Unsolder the welding joints connecting the 4-way valve assy with capillary sub-assy, compressor and condenser; remove the 4-way valve. 4-way valve assy Note: Before unsoldering the welding joint, wrap the 4-way valve with a wet cloth completely to avoid damage to the valve caused by high temperature.
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Page 84: 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 （℉）... -
Page 85: Appendix 3: Pipe Expanding Method
Service Manual Service Manual Additional refrigerant charging amount for R32 Diameter of connection pipe Indoor unit throttl Outdoor unit throttle Cooling only,cooling Liquid pipe Gas pipe Cooling only(g / m) Cooling and heating(g / m) and heating(g / m) Ф6 Ф9.5 or Ф12 Ф6 or Ф9.5 Ф16 or Ф19... -
Page 86: 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 87 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 88 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 89 NOTES...
- Page 92 Wall Mounted Air-Conditioning Unit...