Service Manual Table of Contents Part Ⅰ : Technical Information ............... 1 1. Summary ........................1 2. Specification ......................2 2.1 Specification Shee ......................2 2.2 Operation Characteristic Curve ..................8 2.3 Capacity Variation Ratio According to Temperature ............8 2.4 Noise Curve ........................
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Service Manual 9. Troubleshooting ....................34 9.1 Flashing LED of Indoor/Outdoor Unit and Primary Judgement ........34 9.2 How to Check Simply the Main Part ................43 9.3 Troubleshooting for Normal Malfunction .................59 10. Exploded View and Parts List ..............61 10.1 Indoor Unit ........................61 10.2 Outdoor Unit .........................64 11.
Service Manual Part Ⅰ : Technical Information 1. Summary Indoor Unit: IAH36LB-D3DNA3D/I IAC36LB-D3DNA3D/I Outdoor Unit: IAH36LB-D3DNA3D IAC36LB-D3DNA3D Remote Controller: IARC-36 Technical Information...
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Service Manual Model IAC36LB-D3DNA3D IAH36LB-D3DNA3D Part Number 700482 700478 Rated Voltage 208/230 208/230 Power Supply Rated Frequency Phases Power Supply Mode Outdoor Outdoor Cooling Capacity(Min~Max) Btu/h 33600 33600 Heating Capacity(Min~Max) Btu/h 34600 Cooling Power Input(Min~Max) 4100 4100 Heating Power Input(Min~Max)
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Service Manual Model of Outdoor Unit IAC36LB-D3DNA3D IAH36LB-D3DNA3D Part Number 700482 700478 MITSUBISHI ELECTRIC MITSUBISHI ELECTRIC Compressor Manufacturer/Trademark (GUANGZHOU)COMPRESSOR (GUANGZHOU)COMPRESSOR CO. LTD CO. LTD Compressor Model TNB306FPGMC TNB306FPGMC Compressor Oil FV50S FV50S Compressor Type Rotary Rotary Compressor Locked Rotor Amp (L.R.A) 67.00...
Service Manual 2.2 Operation Characteristic Curve Cooling Heating Condition Condition Indoor:DB 70°F Indoor:DB 80°F WB66°F Indoor air flow: Super High Indoor air flow: Super High Pipe length:24.6ft Pipe length:24.6ft Compressor Frequency(Hz) Compressor Frequency(Hz) 2.3 Capacity Variation Ratio According to Temperature Cooling Heating Conditions...
Service Manual 2.4 Noise Curve Indoor side noise Outdoor side noise Compressor frequency(Hz) Indoor fan motor rating speed 2.5 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...
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Service Manual 36K: Cooling only model Indoor unit Outdoor unit Gas pipe side Valve Di s charge Heat exchanger (evaporator) Suction Accumlator Compressor Heat exchanger Liquid pipe (condenser) side Valve Electron Strainer expansion valve COOLING Cooling and heating model Indoor unit Outdoor unit Gas pipe side...
Service Manual 5. Electrical Part 5.1 Wiring Diagram ● Instruction Symbol Symbol Color Symbol Symbol Color Symbol Name White Green Jumper cap Yellow 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. ●...
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Service Manual ● Outdoor Unit IAC36LB-D3DNA3D IAWH36LB-D3DNA3D The above data is subject to change without notice. Please refer to the nameplate of the unit. Technical Information...
Service Manual 5.2 PCB Printed Diagram Indoor Unit ● Top view Name 2 2 2 Power supply live wire Fuse Interface of neutral wire for health function Power supply neutral wire Interface of communication Power switch High-frequency transformer Interface of fan motor Buzzer Interface of display Interface of display...
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Service Manual Outdoor Unit ● Top view Name Name Name 1 High-frequency transformer T1 6 High pressure protection terminal HPP1 11 Terminal of neutral wire Overload protection terminal of 7 Terminal of 4-way valve 12 Protective tube FU101 compressor OVC-COMP 3 Terminal of temp sensor CN2 8 Electric heater band of chassis HEAT2-L 13 Terminal of ground wire...
Service Manual 6. Function and Control 6.1 Remote Controller Introduction ON/OFF button MODE button FAN button SWING button TURBO button ▲/ button SLEEP button TEMP button I FEEL button LIGHT button CLOCK button TIMER ON / TIMER OFF button Introduction for icons on display screen Set fan speed I feel Send signal...
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Service Manual 1. ON/OFF button Press this button can turn on or turn off the air conditioner. After turning on the air conditioner, operation indicator " "on indoor unit’s display is ON (green indicator. The colour is different for different models), and indoor unit will give out a sound. 2.
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Service Manual 7. SLEEP button Under COOL, HEAT or DRY mode, press this button to start up sleep function. " " icon is displayed on remote controller. Press this button again to cancel sleep function and " " icon will disappear. 8.
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Service Manual Function introduction for combination buttons 1. Energy-saving function Under cooling mode, press "TEMP" and " CLOCK" buttons simultaneously to start up or turn off energy-saving function. When energy-saving function is started up, "SE" will be shown on remote controller, and air conditioner will adjust the set temperature automatically according to ex-factory setting to reach to the best energy-saving effect.
Service Manual 6.2 Brief Description of Modes and Functions 1. Temperature Parameters Indoor preset temperature (T preset Indoor ambient temperature (T 2. Basic Functions Once energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memory function is available, for the first energization, if the compressor is at stop before de-energization, the compressor will be started w ithout a 3-minute lag;...
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Service Manual Protection ② Protection is the same as that under the cooling mode. (3) Heating Mode Working conditions and process of heating ① ° If T Tpreset +3.6 ºF , the unit enters heating mode, in which case the four-way valve, the compressor and the outdoor fan amb.
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Service Manual b.Under AUTO mode,if T ° +1.8 ºF is detected,the unit will select to run under cooling mode,in which case implicit preset preset temperature is 77 ºF ; if T ˜ -1.8 ºF , the compressor will stop, the outdoor fan will stop with a time lag of 1 minute, and preset the indoor fan will run at preset speed;...
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Service Manual Designation of sensors Faults The sensor is detected to be open-circuited or short-circuited for Indoor ambient temperature successive 5 seconds The sensor is detected to be open-circuited or short-circuited for Indoor tube temperature successive 5 seconds The sensor is detected to be open-circuited or short-circuited for Outdoor ambient temperature successive 30 seconds The sensor is detected to be open-circuited or short-circuited for...
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. Prohibit prolong the wire by yourself.
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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.
Service Manual 8. Installation 8.1 Installation Dimension Diagram Space to the wall Space to the wall At least 5 8/9 inch At least 5 8/9 inch Drainage pipe Installation and Maintenance...
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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 the support of outdoor unit Install wall-mounting (select it according to the actual situation) frame, drill wall holes Connect pipes of indoor Fix outdoor unit...
Service Manual 8.2 Installation Parts-checking 8.4 Electric Connection Requirement Name Name 1. Safety Precaution Indoor unit Sealing gum (1) Must follow the electric safety regulations when installing Outdoor unit Wrapping tape the unit. Support of outdoor (2) According to the local safety regulations, use qualified Connection pipe unit power supply circuit and air switch.
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Service Manual in the holes. 5. Connect the Pipe of Indoor Unit (3) Fix the wall-mounting frame on the wall with tapping screws (1) Aim the pipe joint at the corresponding bellmouth.(As show (ST4.2X25TA) and then check if the frame is firmly installed b in Fig.5) pulling the frame.
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Service Manual 7. Connect Wire of Indoor Unit 8. Bind up Pipe (1) Open the panel, remove the screw on the wiring cover and (1) Bind up the connection pipe, power cord and drain hose then take down the cover.(As show in Fig.11) with the band.(As show in Fig.14) (2) Reserve a certain length of drain hose and power cord Screw...
Service Manual 8.6 Installation of Outdoor Unit Refer to the following table for wrench moment of force: 1. Fix the Support of Outdoor Unit(Select it according to Hex nut diameter(inch) Tightening torque(ft·Ibf) the actual installation situation) Φ1/4 11.10~14.75 Φ3/8 20.12~29.50 (1) Select installation location according to the house structure.
Service Manual (3) The water outlet can't be placed in water in order to drain 8.8 Check after Installation and Test smoothly.(As show in Fig.27) Operation 1. Check after Installation Check according to the following requirement after finishing installation. The drain hose can't be fluctuant Items to be checked Possible malfunction Has the unit been...
Service Manual 9. Troubleshooting 9.1 Flashing LED of Indoor/Outdoor Unit and Primary Judgement 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...
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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...
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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...
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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...
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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...
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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...
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Service Manual Display Method of Indoor Unit Display Method of Outdoor Unit Indicator Display (during Indicator has 3 kinds of display blinking, ON 0.5s and OFF status and during blinking, ON Dual-8 Malfunction A/C status Possible Causes 0.5s) 0.5s and OFF 0.5s Code Name Operation...
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Service Manual Installation and Maintenance...
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Service Manual Analysis or processing of some of the malfunction display: 1. Compressor discharge protection Possible reasons: 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;...
Service Manual 9.2 How to Check Simply the Main Part 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? ●...
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Service Manual 2.Malfunction of Blocked Protection of IDU Fan Motor H6 Start Turn the fan blades by hand under power-off condition Adjust the motor and blade Whether the fan blades assembly so that rotor can run can run smoothly? smoothly. Turn unit on to check whether the malfunction is...
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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? ●...
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Service Manual 4. 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...
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Service Manual 5. 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...
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Service Manual 6.Malfunction of communication E6 Main detection points: ● Check if the connection wire and the built-in wiring of indoor and outdoor unit are connected well and without damage; ● If the communication circuit of indoor mainboard is damaged? If the communication circuit of outdoor mainboard (AP1) is damaged? Malfunction diagnosis process: Start...
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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. If the reactor (L) is correctly connected? If the connection is loose or fallen? If the reactor (L) is damaged? Fault diagnosis process: Turn on the unit...
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Service Manual (2) IPM Protection, Out-of-step Fault, Compressor Phase Overcurrent (AP1 below refers to the outdoor control panel) Main check points: If the connection between control panel AP1 and compressor COMP is secure? If loose? If the connection is in correct order? If the voltage input of the machine is within normal range? (Use AC voltmeter to measure the voltage between terminal L and N on the wiring board XT) If the compressor coil resistance is normal? If the insulation of compressor coil against the copper tube is in good condition?
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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 is good? Fault diagnosis process: Overheat and high temperature protection...
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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?
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Service Manual (5) Out of step diagnosis for the compressor (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: Whether the system pressure is too high? Whether the input voltage is too low? Fault diagnosis process: Out of step occurs in Out of step occurs once the operation...
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Service Manual (6)Overload and air exhaust malfunction diagnosis (following AP1 for outdoor unit control board) Mainly detect: Wether the PMV is 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 Connect the...
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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...
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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...
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Service Manual (9) Communication malfunction:(following AP1 for outdoor unit control board) Mainly detect: 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? Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged? The flow chart fir malfunction detect: Start Did the equipment operate...
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Service Manual (10) High-pressure Protection High-pressure protection Use pressure gauge to Measure if the pressure switch Replace the mainboard of measure if the pressure is is normal outdoor unit really high? Check if the operation mode of Set the correct operation Replace the pressure switch indoor unit is set properly? mode...
Service Manual 9.3 Troubleshooting for Normal Malfunction 1. Air Conditioner Can't be Started up Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Confirm whether it's due to power failure. If yes, No power supply, or poor After energization, operation indicator isn’t bright wait for power recovery.
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Service Manual 4. ODU Fan Motor Can't 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 firml...
Service Manual 10.2 Outdoor Unit IAC36LB-D3DNA3D 10 11 12 Installation and Maintenance...
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Service Manual Product Code Description IAC36LB-D3DNA3D Part Number 700482 Front Grill 01473050 Cabinet 0143500401P Front Side Plate 01303249P Axial Flow Fan 10335014 Chassis Sub-assy 0280302601P Compressor Gasket 76710207 Compressor and Fittings 00205275 Discharge Tube Sub-assy 03500600543 Inhalation Tube Sub-assy 03001000246 Right Side Plate 0130504402P Valve Support Sub-Assy...
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Service Manual IAH36LB-D3DNA3D 11 12 13 14 15 Installation and Maintenance...
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Service Manual Part Code Description IAH36LB-D3DNA3D Part Number 700478 Front Grill 01473050 Cabinet 0143500401P Front Side Plate 01303249P Axial Flow Fan 10335014 Drainage Plug 06813401 Chassis Sub-assy 02803026P Drainage Connecter 06123401 Compressor Gasket 76710207 Compressor and fitting 00205275 Electrical heater...
Service Manual 11. Removal Procedure Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant 11.1 Removal Procedure of Indoor Unit completely before removal. Steps Procedure 1.Before disassembly of the unit Axonometric drawing for the complete unit.
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Service Manual Steps Procedure 3.Remove display display Remove 2 screws fixing display, and then remove the filter. 4.Remove panel clasp Pull the clasps at both sides slightly, and then remove the panel. panel 5.Remove horizontal louver Remove the axial bush on the horizontal louver, and then remove the horizontal louver.
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Service Manual Steps Procedure 6.Remove top cover of electric box Remove screws fixing the top cover of electric box. screw Remove the top cover of electric box. top cover of electric box screw cap 7.Remove front case Remove the screw caps on front case. screw Remove screws connecting the front case.
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Service Manual Steps Procedure 8.Remove earthing wire screw Remove earthing screws, and then remove the earthing wire. 9.Remove electric box cover clasp Loosen clasps at the left side of electric box. Loosen clasps on the right side of electric box. clasp electric box cover Remove electric box cover.
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Service Manual Steps Procedure 10.Remove temperature sensor Pull out the indoor temperature sensor. temperature sensor 11.Remove electric box Pull out 6 sockets on PCB board. Pull out two screws on electric box. screw electric box Remove the electric box. Installation and Maintenance...
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Service Manual Steps Procedure 12.Remove water tray water tray Pull the water tray upwards, and then remove the water tray. 13.Remove connection pipe between indoor and outdoor units Separate the connection pipe between indoor and outdoor units. connection position for indoor and outdoor units' connection pipe 14.Remove pipe-stopping plate Remove two screws on pipe-stopping plate for indoor unit, and then remove the pipe-stopping...
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Service Manual Steps Procedure 16.Remove evaporator screw Remove screws between evaporator and bottom case. Turn over the indoor unit and adjust the pipe line to the position as shown by the broken line. Lift up the evaporator, and then remove the evaporator.
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Service Manual Steps Procedure 18.Remove cross flow blade and motor blade motor Remove screws fixing cross flow blade and motor. Remove the motor sub-assy. Separate two cross flow blade. Installation and Maintenance...
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Service Manual Steps Procedure 19.Remove cushion rubber Remove the cushion rubber on cross flow blade. cushion rubber Remove the cushion rubber from the base. Installation and Maintenance...
Service Manual 11.2 Removal Procedure of Outdoor Unit Note: Take heat pump unit for example. Steps Procedure 1. Remove big handle,valve cover and top cover Remove the screw connecting the big handle and right side plate, and then remove the big handle. Remove the screw connecting the valve cover and right side plate, and then remove the valve cover.
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Service Manual Steps Procedure 4.Remove grille and panel Twist off the screws connecting the grille and panel, and then remove the grille. Twist off the screws connecting the panel, chassis and motor support with screwd-river, and then remove the panel. grille panel 5.Remove right side plate...
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Service Manual Steps Procedure 7.Remove electric box electric box Twist off the screws on electric box, cut off the tieline with scissors or pliers, pull out the wiring terminal, pull it upwards to remove the electric box. Twist off the screws on electric box (fireproofing) electric box with screwdriver, and then remove the electric (fireproofing)
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Service Manual Steps Procedure 9.Remove motor support Twist off the tapping screws fixingthe motor support, pull it upwardsand then remove the motor support. motor support 10.Remove isolation sheet Twist off the screws connecting isolation sheet and end plate of condenser and chassis, and then remove the isolation sheet.
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Service Manual Steps Procedure 12.Remove gas valve and liquid valve Twist off the 2 bolts fixing the valve sub-assy. Unsolder the soldering joint between gas valve and air-return pipe and then remove the gas valve.(note: when unsoldering the soldering joint, wrap the gas valve with wet cloth completely to gas valve avoid the damage to valve, and release all...
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Service Manual Steps Procedure 15.Remove left side plate Twist off the screws connecting the left side plate and chassis with screwdriver, and then remove the left side plate. left side plate 16.Remove chassis and condenser Pull it upwards to separate the chassis and condenser.
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 (℉)...
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 ●...
Service Manual Appendix 4: List of Resistance for Temperature Sensor Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units(15K) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) -2.2 138.1 18.75 138.2 3.848 208.4 1.071 -0.4 128.6 69.8 17.93 3.711 210.2 1.039...
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Service Manual Resistance Table of Tube Temperature Sensors for Indoor and Outdoor (20K) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) -2.2 181.4 25.01 138.2 5.13 208.4 1.427 -0.4 171.4 69.8 23.9 4.948 210.2 1.386 162.1 71.6 22.85 141.8 4.773 1.346 153.3 73.4...