MAIN 4.5 Service manual Room airconditioner Split
Contents
1. 15 Leakage detector or soap sponge 1 pc For detecting if there is leakage at the connection 16 Thermometer or digital temperature meter 1 pc For measuring the temperature of the intake and outlet air of the air conditioner 17 Pressure gauge 18 For the working pressure of the air conditioner system measuring Level gauge or plummet 1 pc 19 Putty scraper 1 pc 20 Hex wrench 1 set 21 22 Safety belt Electric probe 23 Rope requirements acc to weight bearing 24 Laying cloth cover cloth shoe covers wiping cloth 25 Ladder and other requisite tools Other auxiliary materials depending on the site conditions Materials 1 Fixing support for outdoor unit GB T5059GB T5213 2 Expansion bolt 10mm 4 pcs 3 Anchoring bolt 10mm with spring washer 4 pcs 4 Concrete nail 6 Insulation tape 5 Heat insulation strap 7 Gypsum powder 1 bag 8 Copper tube and power cable 9 PVC pipe optional 10 Square channel optional 11 Others For fixing the connection pipes and wires 3 Check the machine whether the appearance is in good condition and whether the accessories are complete Focus on checking the single cooling double temperature and cooling capacity whether conform to the specifications in terms of the indoor and outdoor units are compatible and the2. 10 High temp of outdoor PC lighten 11 ambient protection G TROUBLE SHOOTING Indoor Tr sensor error Is CN Tr sensor connector connected properly YES Is Tr sensor resistance value 5KO at 25 normal YES Indoor TP1 sensor error Is CN TPI sensor connector connected properly YES NO NO Indoor P C board is defective NO Is TP1 sensor resistance value NO 5KO at 25 normal YES Indoor P C board is defective 32 A Connect CN properly fl k Replace TA sensor ii E Replace P C board N E Connect CN properly X Ki Replace TC sensor E Replace P C board fi Only indoor fan motor does not operate lt Primary check gt 1 Is it possible to detect the power supply voltage 200 240V between L and N on the terminal block 2 Does the indoor fan motor operate in cooling operation Turn off power supply once and turn it on again Does compressor continue to operate YES Is it possible to detect AC 220V between NO J MI Replace main pin high middle low and P C board Start to operate indoor pin common of motor unit in cooling connector operation at airflow level LOW wait three minutes Does indoor fan operate YES Turn off indoor unit and rotate cross flow fan by hand when the unit is on standby Is it possible to rotate cross flow fan by hand properly NO Replace bearing NO R
3. This button is used to reset the microcomputer When display abnormal or other function abnormal happened press this button to reset the microcomputer the remote control backs to the initial state on the electricity 18 FRESH FOLLOW ME button This button is a composite button When press SHIFT button switches the function between FRESH and FOLLOW ME There is no icon shown on the display screen when starts or stops FRESH function 19 C F button This button is used to switch Fahrenheit and Celsius temperature display on the remote control Replacement of Batteries REPLACEMENT OF BATTERIES e When the signal from the remote controller becomes weak and the indoor unit can not receive it properly or the indications on the display screen becomes blurred please slide the back cover and replace with two new batteries e The positive and negative poles must match the installation positions e New batteries of the same type have to be used for replacement e If the remote controller is not to be used for long time take out the batteries so as to prevent the leakage of the electrolyte from damaging the controller e If when the remote controller is at abnormal state you can take out the batteries on the back cover to clear off the display 49 Basic principles and performances Features of Heating Operations The machines absorb heat from the outdoor air and transfer it indoors so as to heat the room air The heating c
4. This button is used to set time Press this button enters the CLOCK setting after modification of the time by pressing ON OFF button or pressing CLOCK button again to complete the time setting Or complete the time setting when the flashing stops after 15 minutes SHORT CUT button This button is used to fast switching the needed setting Long press the SHORT CUT 13 button indicator flashing to set the needed parameters operation mode temperature fan speed turbo sleep air flow etc After finishing the setting press SHORT CUT button again no indicator show on the display screen the current setting parameters will be stored Every short press the SHORT CUT button the machine runs the memory setting SHORT CUT button will not store the parameters of the function TIMER CLOCK and HOLD 8 C HEAT button This button is used to start or stop the 8 C HEAT function SHIFT button This button is used to shift the function on the composite buttons ION INTE EYE SLEEP CLEAN FRESH FOLLOW ME LAMP HOLD Press SHIFT button the right arrow indicator flashing the second button function is available when you press the composite button When you press SHIFT button again or no press any button in 30 minutes the right arrow indicator stops flashing then the first button function is available when you press the composite button ION INTE EYE button This button is a composite button Press SHIFT button switc
5. at places where there might be leakage of combustible gases Make sure that the earth leakage circuit breaker is installed O Earth leakage circuit breaker Absence of the earth leakage circuit breaker might lead to electric shock and some other hazards In case that the leaked gas accumulates around the units there might occur the accident of fire hazards After the connecting of the wires between the indoor unit and the outdoor unit check whether the connecting is loose or not by pulling the wire with a little force The grounding wire on the air conditioner should be tightly connected to the ground of the power source Improper grounding might cause electric shocks or other hazards i Do not connect the power supply line to an Never try to stop the operation of Dy Wo Gate connector Use of prolonged power DO not press stretch damage heat the air conditioner by pulling out the jing is strictly forbidden Nor is it allowed to share Or modify the power line power supply line the same plug connector with other electri appliances s e It might cause electric shocks overheating fire hazards etc If the power line wire is damaged or needs to be replaced due to some other reasons please make sure to have dealer or the authorized Such performance might cause electric shocks It might cause electric shocks overheating maintenance people to
6. clogged which generated noise Clear the sundries fan or blower damaged Replace it Other The drain pipe is jammed or broken The installation of evaporator and water receiving tank is not in place The outlet part broke Clear up the stem or replace a new pipe reinstall them Paste new gland strip 41 Water leakage of indoor unit When bending tube of the evaporator collides with the PCB s wire the condensed water would flow along the wire and can t flow into the receiving water tank Please avoid contacting between the bending tube and the PCB s wire A lot of evaporator fins fall down to lead to bad flow Renovate these faulty fins The indoor unit didn t install Please reinstall the indoor unit correctly according to the correctly requirement The damping rubber is Put again shedding The drain pipe is shedding Fix again The filter or evaporator is very Clean it dirty refrigerant isn t enough cause the evaporator ice leak water after off Refill refrigerant 42 I User s Manual Please read the Instruction Manual carefully prior to the use of your air conditioner so as to ensure proper operations Instructions for Installation Make sure to have the professional after sale service persons of our company or the authorized dealers to install the units before you use 1 The units are not to be installed
7. do t e replacement or fire hazards fire hazards or other accidents Do not operate the switch by wet Before the connector is plugged Never use the fuse with incorrect hands in please make sure that there is capacity or any other metal wires no dust on it and that it is plugged fully in place copper wire If there is dust on the plug or if the plug is not in place it might cause The use of metal or copper wires for fuse might lt might cause electric shocks e cause operational failures or fire hazards 43 Try to avoid the sunlight and hot air from entering the room During the cooling operation curtains or window blinds should be used to shade off the sunlight As the fan is in high speed operation the insertion might lead to accidents Do not clean the air conditioner with water Do not sit on the outdoor unit or place any other objects on it The falling down of the unit or the objects might cause human injunes and other accidents Try to minimize the generation of heat during the operation of cooling ventilation has to be made from time to time p 152 Properly adjust the up down and leftinght directions of the air flow so as to ge erature Do not attach hang or stack articles lt might lead to the falling down of the air conditioner unit which will result in accidents or injuries Do not use the following substances Hot water over 40C or 104 F The use of hot water wil
8. lens sequence needs adjustment ate The installation shall be operated at the place which is solid unlikely subject Atar to shock and able to bear the weight of machine EET The outdoor unit shall be installed at the place which with good ventilation Position and unlikely subject to rain or direct sunshine Ensuring that the air conditioner can be easily accessed for maintenance and repair 6 Execution of Installation Required distance of the space around the outdoor unit unit mm 3 With obstacles only on 3 A 1 With obstacle above 2 With front side front side outlet port outlet port open 7 v air space Keep repair space on the front side af the 4 With obstacle on both front side and back side 5 With obstacles on four sides Though the upper side is open but there are obstacles on four sides the machine cannot be installed 2 Keep two sides open at least Indoor unit Outdoor unit Installation Requirements for Multiple Units 1 To install multiple units on the same wall or on the same direction of a building all the machines on one floor should be installed on the same level based on the level of machine leg and the transverse spacing shall be kept at least 60cm or more as long as the machine performance will not be affected 2 If there are multiple units on different floors on the same wall or the same direction of the building they s
9. on height anti fall measures shall be taken for the tools and materials used outside the building 6 After completion the installation people must carry out electrical safety inspection The electrical wiring must be in conformance to the national or local safety standards to ensure no leakage T If it is needed to refit the power supply during installation approval must be obtained from the user and the operation must be carried out by the people qualified for electrical safety The result must be in conformance to the national or local standards on electrical safety 8 The service people must check each position of the casing during test run In case of electric leakage immediately stop the machine and check it If it is the problem of installation solve it and test again Ensure the air conditioner works normally If it is the problem of air conditioner report it to the vendor 9 During installation if the service people find that the user s power supply has the potential safety problem they must notify the user and record the details on the warranty card for confirmation or take corrective actions 10 Before completion of the installation or during removal or installation of the machine it is prohibited to switch on the power and start the machine in order to avoid safety accidents 11 The service people must follow the national or local safety rules when using the welding tools The welding must be performed by the people with
10. oo that means transformer coil open circuit or open circuit 6 Insulation inspection 1 insulating property between the shell and the iron core Testing method check by multimeter select the appropriate range measure the resistance if the resistance is cor tens of thousands of ohms means insulating property is good if the measured resistance of the smaller or 0 means core screen has been destroyed 2 insulation between the windings Testing method check by multimeter select the appropriate range one pen contacts with the transformer primary the other contacts with secondary output transformer if the resistance is or tens of thousands of ohms means insulating property is good if the measured resistance of the smaller or 0 means core screen has been destroyed 6 Remote control 1 2 3 Visual inspection 1 injection parts should be no deformation no mask loose tilt phenomenon 2 The battery should be in a good elasticity with no rust 3 liquid crystal display without bubbles display clear correct not more paragraphs ghosting and black Function test The battery into remote control LCD display should clearly show the content non LCD display does not check this The receiver should be able to receive the instructions accurately Common fault 1 Key failure Testing method make sure the unit running installed battery to remote control press various function keys Fault judgement a If multiple buttons a
11. out before the maintenance is to be carried out Before the season of operation During the season of operation he cleaning of the air flier screen Standard imervals should be once every wo weeks 4 Check if there are any blocking materials in the intake and outlet vents of the indoor and outdoor units e Gently press the tow lower ends of the grid and open it N il LEN o Gently pull up the air filter screen and i i RY 4 Remove the air filter screen from the unit take it out in the direction of your body 2 Check if the installation stand is corroded or rusty Clean the air filter screen 3 Check if the if the Screen is pei dirty please use water about machine is terminal 30 C or 86 F to clean it Air it dry after the cleaning properly 4 Note rounded Do not use boiling water to clean the screen groun N Do not bake the screen dry over a fire Do not exert too much force in pulling and stretching the screen 4 Check if the air filter is clean 3 Install the air filter screen To operate the air conditioner without the air fikar screen on will cause the interior of the 5 Connect to the power source machine dirty which might leed to poor performances or damages to the units Clean the air conditioner 6 Put batteries in the remote controller Use a soft and dry cloth to rub the air condiSoner or use a vacuum cleaner to clean it O the air conditioner is very dirty use a piece of chkth and soa
12. safe operation qualification 12 CHIGO has the right to supervise the service supplier for its work safety The accidents due to the service supplier s fault shall be the service supplier s responsibility 13 During installation the service people shall take care to avoid skid cutting scratch burn electric shock or fall Take care to protect the eyes during welding 14 After installation ensure that the people or objects are away from the machine before you connect the power supply Do not switch on the power or test the machine until the power supply is correctly connected 2 Preparation of installation tools Table Configuration of Installation Tools 1 Impact drill with 070mm bit 1 pc 2 Bit 210mm or 212mm 1 pc 3 Slotted screwdriver and cross Tool screwdriver 1 pc for each mini slotted screwdriver Slotted 100 or 120mm Cross 120 or 145mm 4 Torque wrench 2 pcs spanner 3 pcs Spanner 8x10 10x12 12x14mm 5 Hammer 1 pc 0 5Kg 6 Electrical knife 1 pc 7 Wire stripper 1 pc 8 Sharp nose pliers and cutting pliers 1 pc for each Cutting pliers 150mm 9 Pipe bender 1 set 10 Pipe expander 1 set For the expanding the opening of the added pipe 11 Pipe cutter 1 pc For cutting the excess copper tube 12 Reamer 1 pc For deburring the copper tube 13 File 1 pc 150 or 200mm 14 Multimeter 1 set Level 5 0
13. tapping screw 6 oblate tapping screw 7 left net 8 hexagon flange tapping screw 9 oblate tapping screw 10 hexagon flange tapping screw 11 oblate tapping screw 12 hexagon flange tapping screw 13 hexagon flange tapping screw 14 hexagon flange tapping screw 15 Electric heating belt 16 Electric heating belt 19 CS 35V3A H5S Wo E ill 20 Al base and compressor A2 condenser subassembly A3 Partition board A4 pipe system A5 fan and motor support A6 electric installation board AT connecting line A8 right panel A9 front plate subassembly A10 left net and pillar 11 back net A12 top panel subassembly 13 hexagon flange tapping screw 14 hexagon flange tapping screw 15 hexagon flange tapping screw 16 hexagon flange tapping screw 17 hexagon flange tapping screw 18 oblate tapping screw 19 oblate tapping screw 20 oblate tapping screw 21 oblate tapping screw 22 top of electric installation board 23 Electric heating belt 24 Electric heating belt 21 E Components fault and test methods 1 Ordinary compressor 1 Ordinary test power off Testing method Check the compressor by eyeballing first If there has burnt vestiges on the surface of compressor or the compressor gives out the bad smell the reason mainly is that the winding is burnt If the compressor terminal is burnt mostly it is caused by the heavy current or the
14. to increase the temperatures 4 button This button is used to decrease the temperatures 5 AIR FLOW button This button is used to select the left or right air flow direction when press the in flap will swing or fix It just works on three dimensional air flow model 6 Swing button This button is used to change the flap mode natural flow swing or fixed wind 7 FAN SPEED button This button is used to set air rate 8 TIMER button This button is used to set the timed switch on the timed switch off or timer setting cancellation o Press the TIMER button for the first time the hours setting flashing indicates A Wto set the hours for the timed switch on o Press the TIMER button for the second time the minutes setting flashing indicates A V to set the minutes for the timed switch on o Press the TIMER button for the third time the TIMER setting will be implemented by following e When previous two pressing of TIMER button for setting the timed switch on no press A Wto adjust the hours and minutes the setting of switch on is canceled e When previous two pressing of TIMER button for setting the timed switch on pressed A V to adjust the hours and minutes the timed switch on is set and the signal is sent to the receiver o Press the TIMER button for the fourth time the hours setting flashing indicates A Wto set the hours for the timed switch off o Press the TIMER button for the fifth time the minutes setting flashing indi
15. MAIN 4 5 Service manual Room airconditioner Split Wall Mounting Type NOTE Before servicing the unit please first read the service manual and then contact with your service center if meet problem Table of the contents Mi A Installation Exploded view and part list Components fault and test methods Failure display Trouble shooting Usual failure analysis User s manual A Summary 1 Indoor unit 2 Outdoor unit 3 Remote controller S cHieo B Wiring diagram Wiring diagram INDOOR CS 25V3A M AU CS 35V3A M AS n 9 he a Lele 3 py Tt k a 10 OUTDOOR WMI i BERON BL TO POWER SUPPLY A05 02050000163 Wiring diagram OUTDOOR CS 25V3A Y4U CS 35V3A H5S O INDOOR UNIT NOW C Installation 1 Safety Codes 1 The service supplier shall urge its service people to take effective human safety measures during operation 2 The service people shall select an installation position that is solid unlikely shocked and able to support the weight of machines 3 To avoid fire the installation position shall be away from the place where flammable gas exists 4 When the outdoor unit is installed or relocated on the 2 floor of a building or at a height over 2m the service people must use the rope with adequate strength to fasten the outdoor unit securely or take other safety measures to prevent the machine from falling down 5 For working
16. ace related diode b Check whether the current transformator L1 is normal resistance of 3 4 foot should be around a few hundred ohms if abnormal replace it 4 Over current protection too long or too short Check whether capacity of capacitance E3 E6 is normal the normal over current protection is about 20s 35s replace if it is not normal 5 Appear over current protection a check whether the integrated block LM311 7 feet IC3 is normal if not normal check IC3 if damage replace it b check whether triode 9012 is normal if abnormal replace it C check the voltage of over current relay coil is normal about12V if it normal check whether the relay damage no defrost signal temperature signal defrosting relay can t break a check whether the temperature sensor is normal measure sensor resistance if the resistance is too large or too small or even infinite or 00 then replace sensor b check whether the voltage of the defrost relay coil is normal about 12V if it s normal check whether the relay damage 4 Capacitor D Appearance inspection Testing method Visual inspection whether the appearance of capacitor expansion burst if it was that means the capacitor fail Check by open circuit Testing method Check the capacitance by multimeter If the pointer could swing to the right at once then the pointer slowly reset to O that means the capacitance is no problem if the pointer does not 25 move or do not
17. al 37 Make the power supply ok Replace remote control Replace remote receiver or display panel Replace fuse of indoor PCB N Replace transformer i Replace PCB H Usual failure analysis No Fault The possible reason Solution 01 Not cooling well The room is too large the window or door is not closed Close the window and door Too many persons or heat source in room Reduce the heat source The installed position of outdoor unit isn t good Have insolation or not good in ventilation Reinstall the unit The installed position of indoor unit isn t good Bad in air circulation Reinstall the unit The air filter is dirty or blocked Clean this air filter The system blocked Check capillary tube strainer etc repair or replace them The refrigerant leakage refill up refrigerant after checking the leak source The set temperature is too high reduce the set temperature The condenser blocked by dust or others clean the dust and dirt Too much quantity of refrigerant take the redundant refrigerant out Blockage in airinlet or air outlet Clear the obstacles Air mixed in refrigerant refill the refrigerant High outdoor temperature The indoor or outdoor fan motor is running slow Change this indoor or outdoor fan motor The compressor suction or venting capability is very po
18. apabilities through this principle of heat pump go up down with the increase decrease of the temperatures of the outdoor air Itonly needs a fairly short time for such hot air circulation system to raise the room temperature When the outdoor air temperature is very low the system can be used together with other heating devices But good ventilation should be maintained to ensure safety and prevent accidents Defrosting When the outdoor air temperature is very low and humidity is very high frosting will occur to the heat exchanger of the outdoor unit which has negative impacts upon the efficiency of the heating performance In such case the automatic defrosting function will come into play The heating operation will be stopped for 5 10 minutes to do the defrosting The fans of both the outdoor and indoor units are stopped During the defrosting the outdoor unit might generate some steam It is caused by fast defrosting which is not a performance failure Upon the completion of the defrosting process the heating operation is resumed To be in compliance EN61000 3 11 the product shall be connected only to a supply of the system impedance Zsys 0 22008 ohms or less Before connect the product to public power network please consult your Local power supply authority to ensure the power network meet above requirement Methods of maintenance Methods of maintenance The air conditioner must be turned off and plug pulled
19. arance of step motor is burnt rust If have that means the winding of motor is broken In the case of non power hand knob step motor s output shaft if there exist strange noise that may be caused by driving wheel not matching or loose for 28 connecting piece 2 Check torque Self positioning Torque under the action of this torque step motor should not lose not jitter non skid 3 Resistance test D short circuit Measure resistance of each winding by universal meter if the resistance value is lower than the standard the winding may short circuit 2 open circuit Measure resistance of each winding by universal meter if the resistance value is infinite the compressor winding may open circuit 4 Check on running Testing method make sure step motor running with load there shouldn t be unusual noise if there is unusual noise it is caused by rust or wear If the step motor does not work most is due to open coil short circuit or rust 5 Insulating property Testing method check by multimeter select the appropriate range one pen contacts with input terminal the other contacts with body of step motor if the resistance is e or tens of thousands of ohms means insulating property is good if the measured resistance of the smaller or 0 means core screen has been destroyed 6 Electrical performance checking Testing method use needle nose pliers or similar tool clamp output shaft of the motor rotate it clockwise at the same time ch
20. bad contact 2 Resistance test D Short circuit Measure resistance of each winding by universal meter if the resistance value is lower than the standard the winding may short circuit Open circuit Measure resistance of each winding by universal meter if the resistance value is infinite the compressor winding may open circuit 3 Electric leakage amp insulation test Measure resistance between the points of winding and other part of compressor by universal meter if the resistance value is infinite means no electric leakage and the insulation is perfect If the resistance value is tiny or zero electric leakage may exist in compressor or insulation material may be aged or broken 2 AC motor of indoor and outdoor unit 1 General inspection Testing method In the case of non power twist motor rotor by hand meanwhile shaking motor checking is there any rust whether blocked Fault judgement If the motor rotor can t twist that means the motor blocked when shaking motor there should be no abnormal noise if the noise of inside the motor is small it means motor shaft loose if the noise of inside the motor is big it means there is sundries inside of motor or electrical components loose 2 DC resistance 1 Turn to turn short circuit measure entire winding resistance by multimet if the difference between measured value with standard value is larger it means turn to turn short circuit 2 Opencoil measure entire winding resistance by m
21. cates A Wto set the minutes for the timed switch off o Press the TIMER button for the sixth time the TIMER setting will be implemented by following e When previous pressing of TIMER button for setting the timed switch off no press A Wto adjust the hours and minutes the setting of switch off is canceled no signal is sent to the receiver e When previous pressing of TIMER button for setting of the timed switch off pressed A Wto adjust the hours or minutes the timed switch off is set the signal is sent to the receiver o After finishing the setting of the timed switch off when you press TIMER button again the setting of TIMER function the timed switch on or the timed switch off will be canceled o After finishing the setting of TIMER function without pressing TIMER button again the TIMER time will show on the display screen clock digits will not show on the display screen When press CLOCK button the clock digits show on the display screen but the TIMER time will show again on the display screen after releasing the CLOCK button 9 TURBO button This button changes to TURBO operation Press TURBO button during COOL or HEAT operation it does not work in AUTO DRY and FAN mode When you press no icon show on the display screen and no signal 47 send to the receiver under AUTO DRY and FAN mode If the sleep function is set the turbo function will be canceled 10 1 12 13 14 15 16 CLOCK button CLK
22. cator TIMER time for switch on SWING and AIR FLOW indicator MODE button JA 4 FAN SPEED button SWING button A Temperature indicator INTE EYE indicator CPF indicator AIR FLOW button ART 8 C HEAT button RESET button C F button CLOCK button sin ARRON SC HEAT TR HROT WER SEEPCIEAN NESE 45 SLEEP indicator TURBO indicator FOLLOW ME indicator Key lock indicator ION indicator FAN SPEED indicator TIMER time for switch off ON OFF button SET TEMPERATURE button TURBO button TIMER button SHIT button SHORT CUT button SLEEP CLEAN button D an ION INTE EYE button ean LAMP HOLD button FRESH FOLLOW ME button NOTE o Above figure shows all indicators for the purpose of explanation but practically only the pertinent parts are indicated When air conditioner is cooling only mode the HEAT is for FAN The INTE EYE function and FRESH function are not available for Nordic design model oWhen TURBO operation is selected room temperature is not controlled with operation being continually If you feel the room temperature is too cool or too heat please cancel the TURBO operation Transmission procedure When each button on the remote controller is pressed with the remote controller pointing toward the air conditioner unit signal is sent When the signal is received correctly the receiving sound is emitted from the un
23. ctive cords A Replace compressor B El Replace capacitor H Replace overload relay Replace compressor N Bl Supply gas i ll Replace compressor E Press START STOP The unit does not beep at all button OPERATION indication on indoor unit is not indicated Is transmission NO mark indicated Press RST button on remote control with tip of pencil Is receiver on indoor unit exposed to direct sunlight Does indoor unit operate when moving remote control near receiver or indoor unit Is there any thyristor fluorescent light nearby YES Press START STOP button Batteries are exhausted Does indoor unit start to operate by automatic restart function NO Does radio sound is affected by remote control when a signal is transmitted at distance of 5 cm from radio P C board is defective Is transmission mark indicated Does indoor unit beep and operate NO Remote control is defective Keep indoor unit Avoid direct away from Replace Replace Normal Replace remote sunlight thyristor P C board batteries operation control fluorescent light 35 NO Is the unit display Is the power NO normal applied to the unit YES YES Does outdoor unit run Does the compressor run normally Is the power normal check the voltage between L amp N of terminal block NO Check the YES compressor wires and it
24. d voltage of reset feet and crystal oscillator and then check peripheral components Step by step 7 2003 IC 2003 is an inverter in the working condition input and output potentials are always contrary 8 Diodes choose diode from multimeter then the red pen connect positive pole black pen connect negative pole the resistance should be a few hundred ohm the reverse resistance is infinity otherwise diode is bad 9 Transistor D NPN transistor choose diode from multimeter red pen connect base black pen connect other two feet and the resistance should be a few hundred ohm otherwise the transistor damaged 2 PNP transistor choose diode from multimeter black pen connect base red pen connect other two feet and the resistance should be a few hundred ohm otherwise the transistor damaged 10 Infrared Receiver Module choose diode from multimeter black pen connect power pin red pen connect other two feet and the resistance should be a few hundred ohm otherwise the transistor damaged 11 Crystals check voltage of crystals the normal voltage is 2 1 V 2 5 V otherwise the crystals damaged 2 Charged detection 1 Connect PCB with Test bed check mode wind speed temperature and so on according to the remote control and control panel PCB should receive signal accurately and correctly and indicator light should feedback correctly or check whether has the correct output signal by a multimeter such as compres
25. e PCB failed Check Repair and replace this PCB The compressor locked Replace this compressor The compressor open circuit or Replace this compressor short circuit The overload protector has Replace this overload been damaged protector Other No power in AC power connection 06 The AC can t turn The remote have no power or replace the battery or remote on damaged The electric outlet failed Replace electric outlet missing phrase for supply Match right power voltage supply voltage is too low install voltage regulator The main fuse burn out Replace fuse The voltage dependent resistor Change this voltage has been burst dependent resistor This AC can t receive the Repair or replace this remote signal because of receiving head or window receiving head or window failure poor contact for socket connector Check Repair or replace this of PCB PCB The transformer damaged Replace this transformer The PCB damaged and no Replace the PCB output Other 07 Unit suddenly Power failure Wait for the power supply doesn t work after running some time fuse of power supply burn out Replace this fuse poor contact for the plug Check repair and replace the plug and socket Have set regularly shutdown Restart the A C The PCB has any trouble Repair or replace this PCB electromagnetic interference Other romove the plug and plug again restart no refrigerant in system Please
26. eplace capacitor YES Is capacitor of indoor fan ok YES Fan motor Replace indoor operates normally fan motor 33 Turn on power supply Does OPERATION NO indication indicate YES Does compressor delay three minutes by temperature changes or others Wait three minutes Is it possible to detect AC 220 240V on terminal block or contactor of compressor NO NO YES Are all of compressor NO cords normal YES Is compressor motor winding normal Check winding resistor NO YES Is capacitor for NO compressor normal YES NO Is overload relay normal YES NO YES Does compressor stop after a while YES Is gas quantity normal NO Check gas pressure YES YES Compressor is defective Compressor does not operate lt Primary check gt 1 Is the room temperature higher than the preset temperature in cooling operation 2 Is the crossover cable connected properly Is resistance value of room sensor Tr and heat exchanger sensor TP1 normal YES Microcontroller is defective or miniature relay is defective Compressor is defective Capacitor is defective Overload relay is defective Compressor is defective Gas shortage Gas leak 34 NO Check power supply Room sensor or heat exchanger sensor is defective Replace room sensor or heat exchanger sensor Replace P C board Rewire or replace defe
27. fill up refrigerant 40 08 The refrigerant leaked refill up refrigerant after checking the leak source Disconnecting valve dosen t turn on Please turn on disconnecting valve The system is blocked For Replace this parts which Can not heating and example the strainer or connect blocked cooling pipe The compressor failed Replace the compressor No air from the outlet find out the cause replace the motor capacitor PCB or do other actions Other Electromagnetic noise from Replace this compressor compressor Resonance between the Add bumper block or adjust compressor and other parts the position The indoor and outdoor motor rusted or electromagnetic Replace this motor noise The cross flow fan collides with Reconfigure the slot basis The noise of the refrigerant Readjust the position of the moving H amp L pressure pipe The screw of outdoor unit is loose and caused the noise and crew down this screw Noise and vibration vibration 09 is existent during The bearing of cross flow fan running broke Replace the bearing The cross flow fan collides with the foam or sponge The pipe of outdoor unit contact with crust make the pipes well keep the suitable space over 10mm The noise come from synchronous motor stepper motor capacitance transformer reactor Replace them the indoor and outdoor air circulation channel is
28. g by rated power use needle nose pliers or similar tool clamp output shaft of the motor till making the motor stop Fault judgement At rated voltage frequency braking torque of synchronous machine should be 2 0 345Nm if the output shaft of the torque is less than 0 345Nm can be found the torque is not enough can not bring the throttle to run 6 Electrical performance checking Testing method use needle nose pliers or similar tool clamp output shaft of the motor rotate it clockwise at the same time choose AC 20V voltage then connect two pens with step motor input end after rotating the output shaft there should be clear voltage shows on multimeter 10 Outdoor electrical heating cable and crankshaft electric heating cable 1 Outdoor electrical heating cable is controlled by the outdoor environment temperature Starts below 0 degree closes after the temperature up to 3 degree As long as the machine is with electricity connected the outdoor electrical heating cable will keep to determine whether it is needed to work or not 2 Crankshaft electric heating cable is controlled by the outdoor environment temperature Starts below O degree closes after the temperature up to 3 degree As long as the machine is with electricity connected the crankshaft electrical heating cable will determine whether it is needed to work or not 3 When in test mode the outdoor electrical heating cable and crankshaft electrical heating cable will not star
29. g or code is excessively hot Covering of power plug or code is broken P dnas N OS 4 Fuse offen breaks off KI Malfunction is observed TV radio or other devices Abnormal noise is heard during operation When faulty operation movement is observed when the RUN button is pressed even after pulling out the power pulg and restarting the operation after 3 minutes faulty movement does not disappear a R arena goby but why A 52 We hope you will know the following when using the unit The unit can not be restarted just after shut down Restart is dam for 3 n after shut down to protect RUN lamp is ei gt ma i N Three minute protection timer incorporated in the microcomputer actuales automatically Except that power is connected this function does not actuate Air blow is stopped to prevent blowing out of cold air Air is not blown out at starting of heating operation until the indoor heat exchanger is warmed 2 to 5 min HOT KEEP i 7 Because the unit is doing mould proofing operation and indoor The unit will not stop blowing out the air immediately after shut town at COOL operation model mer low speed The louver will not close down until When outdoor temperature is low and humidity is high the unit mf sometimes performs defrostng automatically Please wait During Air is not blown out for 6 to 12 min at heating operation def
30. hes the function between ION and INTE EYE For ION function when press this button starts or stops the ION function For INTE EYE function when press this button starts or stops the INTE EYE function SLEEP CLEAN button This button is a composite button Usually it used for SLEEP function when press SHIFT button this button used for CLEAN function The CLEAN function only effective under the remote control is turned off Press SLEEP button to set sleep function or cancel sleep function After setting the sleep function the sleep function will not be canceled when changing modes When set the sleep function the fan speed will switch to low fan speed automatically but the fan speed can be changed when press the FAN SPEED button If the turbo function is set the sleep function will be canceled CLEAN button only effective under the remote control is turned off No signal under other states when press this button Under the remote control is turned off press this button to switch on the machine the remote control enters cooling mode with setting temperature 25 C and high fan speed LAMP HOLD button This button is a composite button When press SHIFT button switches the function between LAMP and HOLD For LAMP function when press this button starts or cancels LAMP function There is no icon shown on the display screen when start or cancel LAMP function For HOLD function when press this button 48 locks or unlocks the keyboard 17 RST button
31. hould be preferably installed on the same vertical line based on the left side of the body streamline To avoid air return or mutual interference at the outlet the longitudinal spacing shall be kept at least 65cm or more Requirements for outdoor guardrail optional If the user is to install guardrail for the outdoor unit the spacing to the machine body must be kept 0 5m or more Insert through Pipe Connect to Machine Bundle the connection wire to the connection pipe and drainage pipe The connection wire may also be inserted through PVC pipe To insert through the pipe protective measures should be taken to prevent the expanded bell mouth from damage and prevent the sand from entering the connection pipe Take a connection pipe with expanded mouth coat frozen oil evenly onto the connector of the 2 way 3 way valve and the expanded mouth Put the expanded mouth and connector on the same straight line and rotate the nut to its end with hands and tighten it with spanner Remove the end cover and clip of outdoor connection wire Then connect the wire to position according to color or mark indicated in the wiring diagram When the exposed section is fully inserted use the screw to press it tightly Do not cut the round connector at the connection wire end into Y shape Fix the wire with clamp and then fix the end cover of the wire Vacuumming After connecting the pipe between indoor and outd
32. it Use of remote controller Operating machine in selected modes T Point the remote controller at the unit press the ON OFF button then press the MODE button select the needed mode AUTO COOL DRY HEAT or FAN Press the SET TEMPERATURE button to increase or decrease the readings until the needed temperature is displayed The room set temperature range is from 16 C 32 C 61 F 90F gt Press the FAN SPEED button to choose the air rate you want Low display indicates Med display indicates mm Hi display indicates mamm Auto display mam indicator flashing Press the SWING button to choose the up down air flow direction you want fixed wind display indicates swing display indicator flashing Natural flow display indicates i Press the AIR FLOW button to choose the left right direction you want swing display indicator flashing fixed wind display indicates lt Press the ION button display indicates Press the INTE EYE button display indicates This function is not available for Nordic design model Press the FRESH button no indicator display on the screen This function is not available for Nordic design model 46 Button Operation 1 ON OFF button This button is used to start or close operation of the machine 2 MODE button This button is used to change the operation mode AUTO COOL DRY HEAT FAN 3 A button This button is used
33. k it with neutral home use detergent to do the cleaning 50 After the season of operation IS 1 Set the temperature at 30 C or 86 Fand operate in the fan status for about half a day To make the interior ol the units dry 2 Stop the operation of the machine and tum off the power switch D The air conditioner will consume about SW of electric N power after the machine is turned off For fe purpose of energy saving and safely i is advisable to pull the plug out during the noneoperatona seasons 3 Clean and install the air filter screen 5 Take the batteries out from the remote controller Note If the air filter screen is blocked by dust or dirt the performance of cooling and heating will be affected with the operation noise and power consumption increased Therefore the air filter screen should be cleaned regularly 51 Treatment at service call Please check Ine following before requesting after sale service from your dealer The air conditioner does not operate at all Is ne power plug in ls tha timo set to s here a power an outlet ON position failure or a blown _ fusa e wW Is the room temperature setting suitable sutabk TEMP A Is direct sunlight entering the room Cases requiring immediate contact with the distributor Pull out the power plug immediately and inform to your distributor in the following situations fm or breaker often breaks off Power plu
34. l ES u UBI iii AUT TE 1 LOUVER 16 2 THERMAL INSULATION PIPE 3 SWING LOUVER 4 CONNECTING LEVER 5 WATER RESISTANT RING OF WATERPOUT 6 LOUVER SUPPORT POLE 7 GUIDE BEARING 8 OUTLET PART 9 BASE 10 CROSS FLOW FAN 11 BEARING 12 EVAPORATOR 13 EVAPORATOR PLASTIC LEFT PLATE 14 SCREW COVER 15 CLIP 16 AIR FILTER 17 FRONT PANEL 18 Display lamp panel 19 DISPLAY BOX 20 MIDDLE FRAME COVERPLATE 21 MIDDLE FRAME 22 TUBE TEMP SENSOR HOLDER 23 SPRING OF SENSOR 24 COPPER PIPE OF SENSOR 25 EVAPORATOR RIGHT PLATE 1 26 EVAPORATOR RIGHT PLATE 2 27 MOTOR PLATEN 28 TUBE TEMP SENSOR 29 ROOM TEMP SENSOR 30 ELECTRIC CONTROL PLATE 31 TRANSFORMER 32 TERMINAL BOARD 33 WIRE CLIP 34 ELECTRIC BOX 35 INDOOR MOTOR 36 POWER CORD 37 CONNECTING CABLE 38 PIPE CLAMP 39 STEP MOTOR 40 WALL MOUNTING FRAME 41 REMOTE CONTROLLER 17 2 Outdoor CS 25V3A Y4U A1 right panel A2 valve installation plate A3 electric installation board A4 pipe system A5 base and compressor A6 fan and motor support AT front plate subassembly A8 top panel subassembly A9 condenser subassembly A10 pillar and back net A11 Partition board 2 hexagon flange tapping screw 3 hexagon flange tapping screw 4 hexagon flange tapping screw 5 hexagon flange
35. l deform the air conditioner or make it fade in color Gasoline pant diluent benzene and polishing agents etc These substances will deform the air conditioner or cause scratches Instructions for Removal and Repair When removal or repair is needed please contact the dealer or authorized maintenance amp installation people In case of any abnormal occurrences smell of burning please stop the operation at once cut off the power supply and contact the dealer or authorized maintenance people 44 Do not use combusting apparatuses in the air conditioned room It might lead to the incomplete combustion of these apparatuses Prior to the maintenance of the air conditioner please cut off the power supply first Never do the cleaning of the units when the fan is in high speed operations D Do not keep exposed to the cool air for long time ES body which is harmful to your health Check the supporting structures of the units carefully A Y 3 In case of damages the supporting structures should be immediately repaired so as to avoid falling down of the unit which might cause human injuries or other accidents Pull out the plug when the unit is not in use for long time so as to ensure safety When the plug amp to be pulled out make sure that the switch of the air conditioner is turned off Remote controller COOLING indicator DRYING indicator HEATING indicator FANING indi
36. lace this compressor Four way valve slight mixes up Let the four way valve moving continually Replace the four way valve if it can t move The capillary valve has been blocked Replace this capillary valve other 04 Can not heating The fan doesn t run motor or capacitor of fan failed Poor contact for the line of capacitor line or PCB fault Check Repair and replace The compressor doesn t work the voltage is too low or high overload wiring error The compressor failed The capacitor of compressor failed the capacity of electric fence isn t enough Check Repair and replace The refrigerant leaked refill up refrigerant after checking the leak source The system blocked completely Check capillary tube strainer etc repairor replace them The compressor failed Replace compressor The compressor is blocked replace it The four way valve failed and can t replace direction Check the circuit and replace the four way valve The PCB damaged and no output Replace PCB 39 The indoor temp sensor has been damaged Replace this indoor tempsensor Other 05 The compressor The compress connecting wire reconnect this line doesn t work is loose supply voltage is too low install voltage regulator The capacitor of compressor Replace this capacitor failed Th
37. oes not ring or abnormal a Check whether the voltage of Buzzer is normal about 12V if normal then check the next step 23 b Check whether the Buzzer is noiselessly 4 Not receive or receiving is insensitive a Check whether the wire of receiver is normal or replace the connecting wires b Check whether the voltage of receiver is normal 5V or check the power supply circuit c Check whether the receiver is normal if normal check whether the main chip is normal otherwise replace it 5 Sensor failure a Check whether the voltage of room temperature sensor and pipe temperature sensor is normal make sure at the same temperature conditions the voltage difference between these two sensors can not be greater than 0 1V otherwise need to replace b take down the sensor and measure the resistance its resistance should be within standard deviation 6 Indoor fan failure a Check whether capacitance of fan is the same with nominal value or replace the capacitor or check the next step b For the tap fan check voltage of high medium and low wind relay the normal voltage is DC12V C For the tap fan check whether the relay is normal or may replace relay d Check whether the AC power supply circuit is normal or replace related devices e For the PG fan check whether SCR C1815 is cold solder joint loose this circuit is normal or not f For the PG fan check whether voltage of SCR C1815 is normal Point C is about 0 3V P
38. oint b is about 0 7V point e is OV or replace the C1815 7 Step motor does not run or not good at running 8 Check whether solder joint of step motor is cold solder joint loose and short circuit for rosin the main chip the output voltage of control pin is about 2V or check whether the main chip is normal or checking the next step b Check 4 pin voltage which connect the step motor with 2003 is normal 10 12V or check the 2003 or the connecting wire C check whether the connecting wire of step motor and the motor is normal 8 The relay does not work a Check whether the voltage of the relay coil is normal usually about 12V otherwise check whether the relays is normal or checking the next step b Check whether the relay is good otherwise replace of relay C Check whether the output pin of the main chip is high 5V or check whether the main chip is normal or checking the next step d Check whether the power supply circuit transformer input and output voltage is normal or checking the next step e Checking whether the piezoresistor and temperature insurance are normal the resistance of piezoresistor is infinite the resistance of temperature Insurance is 0 otherwise check related componentsthe or checking the next checks 9 Key is invalid a Check whether the output pin of the button is normal or replace b Check whether the voltage of display board is 5V otherwise check the power supply circuit or connecting
39. oor unit it should be vacuumed with vacuum pump Operate as follows Loosen the nut on low pressure valve element and filling portal connect the vacuum pump to the filling portal by hose with pin and then start the vacuum pump When the indicator gauge points to 15Pa stop vacuumming and hold for approx 30s Pay attention to the vacuum level If decreased be sure to eliminate the leakage Repeat the above procedures When the vacuumming process is completed close the vacuum valve and open the high pressure valve element for 1 4 turn to fill the refrigerant to the low pressure section Remove the connection hose Fully open the high pressure and low pressure valves Tighten the nuts on the valves 12 Table Standard of piping torque 1 Nut torque of connecting pipe R410a R407c Outer diameter of be pipe 2 Nut torque of connecting pipe R22 Outer diameter of steel pipe Fastening torque Reinforced fastening torque mm inch Kgf m Kgf inch Kgf m Kgf inc h 6 00 1 4 1 6 6 3 2 0 7 9 9 52 3 8 3 0 11 8 3 5 13 8 13 158 se rs 295 leo las Connection pipe Connection Wall cross wire pipe Drainage pipe 7 Introduction of usage and maintenance knowledge 8 Ending clear the site collect tools fill the warranty card and say goodbye to the user 15 D Exploded view and part list 1 Indoor CS 25V3A M A CS 35V3A M A PER d il Ill
40. oose AC 20V voltage then connect two pens with step motor input end after rotating the output shaft there should be clear voltage shows on multimeter Synchronous motor 1 General inspection Testing method Visual inspection check whether the appearance of synchronous machine is burnt rust If have that means the winding of motor is broken In the case of non power hand knob output shaft if there exist strange noise that may be caused by driving wheel not matching or loose for connecting piece 2 Resistance test D short circuit Measure resistance of each winding by universal meter if the resistance value is lower than the standard the winding may short circuit 2 open circuit Measure resistance of each winding by universal meter if the resistance value is infinite the compressor winding may open circuit 3 Testing method check by multimeter select the appropriate range one pen contacts with input terminal the other contacts with body of step motor if the resistance is or tens of thousands of ohms means insulating property is good if the measured resistance of the smaller or O means core screen has been destroyed 4 Check on running Testing method make sure synchronous machine running with load there shouldn t be unusual noise if there is unusual noise it is caused by rust or wear If it does not work most is due to open coil short circuit or rust 29 5 Torque checking Testing method make sure the motor runnin
41. or Change this compressor Four way valve slight mixes up other replace it 02 Can not cool The fan doesn t run motor or capacitor of fan failed Poor contact for the line of capacitor line fault The motor relay and drive circuit is fault Check Repair and replace The compressor doesn t work the voltage is too low overload wiring error The compressor failed The capacitor of compressor failed the capacity of electric fence isn t enough Check Repair and replace The refrigerant leaked completely refill up refrigerant after checking the leak source 38 The system blocked completely Check capillary tube strainer etc repairor replace them other 03 Not heating well The room is too large the window or door is not closed Close the window and door The set temperature is too low Heighten the set temperature The air filter is dirty Clean this filter The refrigerant leaked refill up refrigerant after checking the leak source The system blocked slightly Check capillary tube strainer etc repair or replace them The outdoor temperature is too low The A C can t melt down frost Replace this sensor or move or the sensor to the thickest position of frost The indoor or outdoor motor speed is lower Replace this fan motor The compressor suction or venting capability is very poor Rep
42. r the voltage of 2 6V remote control should be able to work properly In not more than 80 of the rated voltage 2 4V the LCD of remote control should be able to clearly show 7 Four way valve 1 General inspection Visual inspection pull coil of each power cord wires should be no break phenomenon 2 DCR 1 turn to turn short circuit Check by multimeter select the appropriate range measure the resistance If the resistance smaller than the standard resistance it means four way valve turn to turn short circuit 2 coil Open circuit Check by multimeter select the appropriate range measure the resistance if the resistance is o it means four way valve open circuit 3 Insulating property Testing method check by multimeter select the appropriate range one pen contacts with input terminal the other contacts with body if the resistance is e or tens of thousands of ohms means insulating property is good if the measured resistance of the smaller or 0 means core screen has been destroyed 4 Run on power Testing method connect the four way valve and the electrical components connected to rated power change the mode between cooling and heating mode check whether the four way valve could correctly change Fault judgement if the four way valve could not change correctly means four way valve bad or wire partial short circuit fault 8 Step motor 1 General inspection Testing method Visual inspection check whether the appe
43. re not work the main reason is for the bad chip b If sometimes normal and sometimes fail then the main reason is the underlying part has a impurity 2 No emission signal Testing method make sure the unit running installed battery to remote control press various function keys Fault judgement If the remote control without signal but the display and other functions are normal then most of the reason is that a bad emission tube If the display is not normal normally chip damage 3 Testing method make sure the unit running installed battery to remote control press various function keys Fault judgement 27 If the remote control is neither transmit nor display means chip resistors chip capacitance crystal 1 iron crystal and other damage If you press reset button remote control full screen then back to not show the status then the most for crystal 2 ceramic oscillator is damaged 4 Show insufficiency Testing method make sure the unit running installed battery to remote control press various function keys Fault judgement If the remote control showing the insufficiency phenomena that are mostly liquid crystal rupture leakage and other causes 4 Electrical properties 1 tandem the ammeter with remote control in the DC 3 0V voltage if unit can not launch a signal in the unit with liquid crystal display the quiescent current lt 70uA in the absence of liquid crystal display the quiescent current lt 20UA 2 unde
44. reset means capacitance is open circuit electrolyte dry or short circuit Capacitance breakdown leakage of electricity Testing method Check the capacitance by multimeter If the pointer couldthen the pointer can t move that means the capacitance is breakdown or leakage of electricity Loss tangent inspection as understanding project Judge standard run about 10 minutes check surface temperature of capacitance If the surface temperature exceeds the ambient temperature about 15 C that means loss tangent has exceeded the limitvalue 0 0018 Check capacitance check by pointer type multimeter if the pointer oscillation amplitude is bigger than the standard capacitance that means capacitance has been attenuated Digital Multimeter check by Cx interface the capacity should not exceed the nominal capacity of 5 Insulation inspection Testing method normally the resistance of capacitance is if the number of resistance is thousands of ohms or greater that means capacitance is no problem if the resistance is smaller or O that means capacitance has been damaged should be immediately replaced 5 Transformer 1 Visual inspection Check whether the appearance of transformer burnt phenomenon check whether has the burnt transformer smell If the appearance of burnt yellow phenomena or had burnt smell transformer winding is bad 2 Check on running Testing method make transformer running under load which can run with PCB
45. rosting water or steam are raising from the outdoor unit Air is not blown out at DRY operation Indoor fan is sometimes stopped to prevent vapor of dehumidified moisture and save energy This phenomenon sometimes occurs when the temperature and Mist is blown out at COOL operation v e 2 snl dar nire will disappear with the N Air blown out during operation may smell This is the smell Odor is sent out of tobacco or cosmetics sticked to the unit Noise is heard cracking sound This is caused by the refrigerant that is circulating inside the unit Noise is heard cracking sound After a power stoppage or after disconnecting the power supply plug This is caused by heat expansion or contraction of plastics The memory circuit of the microcomputer is cleared Operate Operation can not be restarted even if the power is recovered the remote controller again to restart the operation Remote control signals may not be received when signal receiver on the air conditioner body is exposed to direct sunlight or strong lighting In that case interrupt the sunlight or darken the lighting Remote control signals are not received Moisture may form on the air outlet grilles If the unit is operated for a long period of time with the high humidity moisture may form on the air outlet grilles and drip down 53
46. s capacitor Press the power ON OFF button of wire control or remote control YES Does the indoor Normal Does the beeper RO unit run beep YES Check the failure code NO Is the display all according to the failure off YES table Check the connector on display PCB connected to control PCB Check the display PCB itself 36 Check power supply mains or interconnection wires Check the wiring of indoor and outdoor Does the control NO ok Control failure YES Does the control PCB ok NO Control PCB failure Indoor unit and outdoor unit don t operate Does the electric switch cut off after a few nimutes Does the electric switch cut off Is the wires of indoor unit and outdoor unit no problem Reconnect the wires YES Is the insulation of indoor unit and outdoor unit no problem Find the reason and NO replace the failure componet YES YES Is the resistance of each main component no problem NO Rreplace the failure componet Indoor and outdoor unit don t operate Is the power supply no problem YES Change a good remote YES does the air conditioner running NO Press emergency key does the air conditioner running YES NO Does the fuse of indoor YES PCB burn out Does the transformer has output YES Does the 12V and 5V of NO indoor PCB have YES norm
47. should be running smoothly there shouldn t be unusual noise if there is unusual noise it is multi electromagnetic noise 3 Electrical Characteristics 1 No load characteristics As for the power supply 220V 50Hz 220V 60Hz 240V 50 Hz power 5 8W transformer primary load current lt 20mA power supply 115 60Hz power 5 8W of the transformer primary No load current lt 35 mA no load output voltage does not exceed rated voltage 10 2 Load Characteristics transformer at rated load conditions the error of the secondary coil voltage should not be greater than the requirements in Table 1 4 Output power 1 Measured current and voltage with the multimeter and then according to P Ul the output power should not exceed transformer nominal requirements of 8 If you exceed this requirement you can determine the transformer s power attenuation 2 According to P U2 R the output power shall not exceed the transformer nominal requirements of 8 If you exceed this requirement you can determine the transformer power attenuation 26 5 DCR 1 turn to turn short circuit check by multimeter select the appropriate range measure the resistance of transformer winding if the deviation between real resistance with the standard resistance is great that means the inter turn short circuit and outlet the open circuit 2 Coil Open circuit check by multimeter select the appropriate range measure the resistance if the resistance is
48. sor fan four way valve electrical heating step motor synchronous machine negative ion High voltage generator Dc decelerating motors 2 Each function control key should be flexible 3 For liquid crystal display or fluorescence display character should be clear and correct There should not have the ghosting brightness blance Light board display normally have no obvious Unnormal flicker 4 step motor should be able to rotate 5 For the PCB with self test function press the self test button and then enter the self test program the output should be consistent with the design requirements no procedures chaos or system halted 3 Common fault detection 1 Unit doesn t work a Check whether input and output voltage of the transformer is normal input AC220V Output AC10V 14V if no problem then check the next step b Check whether three terminal voltage regulator 7805 is normal if no problem then check the next step C Check whether the voltage of crystal oscillator is normal 2 1V 2 5V if not replace crystal d If all above are normal then replace the main chip 2 Display bad or indicator light does not shine Showing bad or light does not shine a Check whether the voltage of display board is normal 5V b Check whether the resistance of display lamp is normal light emitting diode forward resistance is a few hundred ohms C check whether chip is cold solder joint short circuit or replace the chip 3 Buzzer d
49. style of indoor unit conforms to the requirements Look through the observation hole and check whether the connection pipes remote controller Product Warranty Card and other accessories are complete If not do not open the package but contacting the vendor Machine Inspection 4 Check the user s power supply kilowatt meter capacity wire diameter electric leakage protection switch ground wire and voltage Use the multimeter to measure the power voltage which shall be within 10 of the rated voltage Use special line for the power supply of air conditioners and ensuring that the capacity of entire supply line branch line power line kilowatt meter air Check the switch etc is higher than the maximum rated current of air conditioner power The power configuration and cable distribution must meet the local supply requirements for electrical safety Advise the user to apply special air switch electric leakage protector and other necessary protection devices for air conditioners Their capacity shall meet the needs of air conditioner For the line with fuse it is prohibited to use copper wire to replace the fuse Table The Requirements of Different Models for Power Supply Table 1 220V 240V Item Section A f oM ea Circuit Switch Model Power Cable 2 A mm Split Wall Mounting Series 25 1 0 10 5 Selecti on of Installation Position Indoor outdoor
50. t 30 F Failure display Check Serial Malfunction content Indoor unit display status parts number Code LED Indoor unit without the nixietube Running Timing lamp lamp flashing flashing frequency n frequency n Indoor 1 The communication F1 parts faults in the indoor and 1 lighten outdoor units 2 Indoor ambient temp F2 sensor fault 5 Honten 3 Indoor coil temperature F3 sensor fault Include 3 lighten Inlet middle of pipe outlet 4 Indoor fan fault F4 4 lighten Outdoor 1 Outdoor module fault F5 5 lighten parts 2 Outdoor ambient temp F6 6 lighten sensor fault 3 Outdoor coil temp F7 7 lighten sensor fault 5 Compressor discharge F9 9 inten temp sensor fault 7 Compressor drive FC v hiten abnormal fault 10 FF 44 lighten Other fault Check parts Serial Protection content Indoor unit display status number LED Indoor unit without Code the nixietube Running Timing lamp lamp flashing flashing frequency frequency n n Indoor parts 1 Evaporator temp P1 lighten 1 protection Outdoor 1 Overheat over current P2 lighten 2 parts protection of inverter module 2 Over current protection P3 lighten 3 31 3 Compressor discharging P4 lighten 4 temp protection 6 Power supply over P7 lighten 7 current over voltage protection 9 High temp of condenser PA lighten 10 protection
51. ultimet if the resistance is means opencoil 3 Electric leakage amp insulation test Measure resistance between the points of winding with other part of motor by universal meter if the resistance value is infinite means no electric leakage and the insulation is perfect If the resistance value is tiny or zero electric leakage may exist in motor or insulation material may be aged or broken 3 General Electric control panel PCB 1 Test method for common electronic component 1 SCR measure resistance between control electrode and positive electrode by multimeter model Z47 is 200 to 4000 BT131 is 1 4K 1 7K if the resistance is too large or too small means not normal And if the resistance between other electrode is infinite means SCR damaged 2 Check the voltage between input terminal and output terminal if input voltage is ok and did not have the output voltage need to replace the relay 3 Optocoupler the red pen connect the first leg of optocoupler black pen connect the second leg if the forward Resistance is about 1K and the resistance between other feet is infinite means optocoupler damaged 4 Transformer primary coil resistance is 4000 10000 Secondary coil resistance is 150 400 transformer damaged if deviation is big 22 5 Temperature protective tube varistor resistance of protective tube should be 00 that is resistance of varistor should be infinite 6 Main Chip check the working voltage 5V an
52. wire C If all above are normal check whether the main chip is normal or replace the main chip 4 Electric control panel detection D red power indicat LED1 is not bright 24 a Check whether the LED1 is damaged if damaged please replace the diode b Check whether the input and output voltage of the 7812 and 7805 is normal 7812 input 14V output is about 12V 7805 input 12V the output 5V if damaged replace the related device or check downward c Check whether the bridge rectifier diodes D1 D4 is normal if the damaged please replace related diode d Check whether the power supply transformer of input and output is normal input is about AC220V the output is about AC14V if it is damaged replace the transformer 2 Green light LED2 does not shine or the phase sequence protection 8 Check whether the light emitting diode LED2 damaged if not normal then the replace the light emitting diode b Check whether the Q5 9014 collector voltage is normal if not normal then the replace 9014 C Check whether the relay RY3 is normal if not normal then the replace the relay d Check whether the resistance of the R7 R10 is normal if not normal then the replace the related resistance e Check whether the phase sequence of the three phase power supply is normal if not then the replace phase sequence 3 No voltage for over current detection circuit a Check whether the rectifier diodes D5 D8 is normal if not normal repl
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