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SERVICE MANUAL Model JS035-D2 WARNING This servic e informatio n is designed for experience d repai r technician s only and is not designe d for use by the genera l public. It does not contai n warning s or caution s to advise non-technic al individu als of potentia l dangers in attemptin g to servic e a product. Product s powered by electricit y shoul d be service d or repaire d only by experience d professiona l technicia ns. Any attemp t to service or Repai r the produc t or product s deal t with in this servic e infor mation by anyone else could result in seriou s injury or death Version V1 Date 2020-11-14 Table of contents Contents 1. Introduction............................................................................................ 1 2. Features ................................................................................................ 7 3. Specifications ........................................................................................ 8 4. Sensors list............................................................................................ 9 5. Piping diagrams.....................................................................................10 6. Printed circuit board connector wiring diagram.....................................11 7. Functions and control ........................................................................... 14 8. Dimensional drawings ........................................................................... 26 9. Center of gravity .................................................................................. 26 10. Service Diagnosis ................................................................................ 27 11. Circuit diagrams .................................................................................. .44 Domestic air conditioner Introduction 1. Introduction 1.1 Safety Cautions Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “Warning” and “Caution”. The “Warning” items are especially important since they can lead to death or serious injury if they are not followed closely. The “Caution” items can also lead to serious accidents under some conditions if they are not followed. Therefore, be sure to observe all the safety caution items described below. About the pictograms This symbol indicates an item for which caution must be exercised. The pictogram shows the item to which attention must be paid. This symbol indicates a prohibited action. The prohibited item or action is shown inside or near the symbol. This symbol indicates an action that must be taken, or an instruction. The instruction is shown inside or near the symbol. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates Normally, and explain the cautions for operating the product to the customer. Domestic air conditioner Introduction 1.2.1 Caution in Repair Warning Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for a repair. Working on the equipment that is connected to a power supply can cause an electrical shook. If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits, do not touch any electrically charged sections of the equipment. If the refrigerant gas discharges during the repair work, do not touch the discharging refrigerant gas .The refrigerant gas can cause frostbite. When disconnecting the suction or discharge pipe of the compressor at the welded section, release the refrigerant gas completely at a well-ventilated place first. If there is a gas remaining inside the compressor , the refrigerant gas or refrigerating machine oil discharges when the pipe is disconnected, and it can cause injury. If the refrigerant gas leaks during the repair work, ventilate the area. The refrigerant gas can generate toxic gases when it contacts flames. The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit. Be sure to discharge the capacitor completely before conducting repair work . A charged capacitor can cause an electrical shock. Do not start or stop the air conditioner operation by plugging or unplugging the power cable plug. Plugging or unplugging the power cable plug to operate the equipment can cause an electrical shock or fire. 2 Domestic air conditioner Introduction Warning Do not repair the electrical components with wet hands . Working on the equipment with wet hands can cause an electrical shock Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shock. Be sure to turn off the power switch and unplug the power cable when cleaning the equipment. The internal fan rotates at a high speed, and cause injury. Do not tilt the unit when removing it. The water inside the unit can spill and wet the furniture and floor. Be sure to check that the refrigerating cycle section has cooled down sufficiently before conducting repair work. Working on the unit when the refrigerating cycle section is hot can cause burns. Use the welder in a well-ventilated place. Using the welder in an enclosed room can cause oxygen deficiency. 1.2.2 Cautions Regarding Products after Repair Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools can cause an electrical shock, excessive heat generation or fire. When relocating the equipment, make sure that the new installation site has sufficient strength to withstand the weight of the equipment. If the installation site does not have sufficient strength and if the installation work is not conducted securely, the equipment can fall and cause injury. Be sure to install the product correctly by using the provided standard installation frame. For Incorrect use of the installation frame and improper installation can cause the equipment to fall, resulting integral in injury. units only Be sure to install the product securely in the installation frame mounted on a window frame. If the unit is not securely mounted, it can fall and cause injury. 3 For integral units only Domestic air conditioner Introduction Warning Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to the electrical equipment, the internal wiring regulations and the instruction manual for installation when conducting electrical work. Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire. Be sure to use the specified cable to connect between the indoor and outdoor units. Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals. Improper connections can cause excessive heat generation or fire. When connecting the cable between the indoor and outdoor units, make sure that the terminal cover does not lift off or dismount because of the cable. If the cover is not mounted properly, the terminal connection section can cause an electrical shock, excessive heat generation or fire. Do not damage or modify the power cable. Damaged or modified power cable can cause an electrical shock or fire. Placing heavy items on the power cable, and heating or pulling the power cable can damage the cable. Do not mix air or gas other than the specified refrigerant (R-410A / R22) in the refrigerant system. If air enters the refrigerating system, an excessively high pressure results, causing equipment damage and injury. If the refrigerant gas leaks, be sure to locate the leak and repair it before charging the refrigerant. After . charging refrigerant, make sure that there is no refrigerant leak. If the leak cannot be located and the repair work must be stopped, be sure to perform pump-down and close the service valve, to prevent the refrigerant gas from leaking into the room. The refrigerant gas itself is harmless, but it can generate toxic gases when it contacts flames, such as fan and other heaters, stoves and ranges. When replacing the coin battery in the remote controller, be sure to disposed of the old battery to prevent children from swallowing it. If a child swallows the coin battery, see a doctor immediately. 4 Domestic air conditioner Introduction Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site, to prevent electrical shocks. Do not install the equipment in a place where there is a possibility of combustible gas leaks. If a combustible gas leaks and remains around the unit, it can cause a fire. Be sure to install the packing and seal on the installation frame properly. If the packing and seal are not installed properly, water can enter the room and wet the furniture and floor. 1.2.3 Inspection after Repair Warning Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet all the way. If the plug has dust or loose connection, it can cause an electrical shock or fire. If the power cable and lead wires have scratches or deteriorated, be sure to replace them. Damaged cable and wires can cause an electrical shock, excessive heat generation or fire. Warning Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances since it can cause an electrical shock, excessive heat generation or fire. 5 Domestic air conditioner Introduction Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure. Improper installation and connections can cause excessive heat generation, fire or an electrical shock. If the installation platform or frame has corroded, replace it. Corroded installation platform or frame can cause the unit to fall, resulting in injury. Check the grounding, and repair it if the equipment is not properly grounded. Improper grounding can cause an electrical shock. Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 M ohm or higher. Faulty insulation can cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage can cause the water to enter the room and wet the furniture and floor. 1.2.4 Using Icons Icons are used to attract the attention of the reader to specific information. The meaning of each icon is described in the table below: 1.2.5 Using Icons List Icon Type of Information Note Note Description A “note” provides information that is not indispensable, but may nevertheless be valuable to the reader, such as tips and tricks. A “caution” is used when there is danger that the reader, through Caution Caution incorrect manipulation, may damage equipment, loose data, get an unexpected result or has to restart (part of) a procedure. Warning Warning A “warning” is used when there is danger of personal injury. A “reference” guides the reader to other places in this binder or in Reference this manual, where he/she will find additional information on a specific topic. 6 Domestic air conditioner Features 2.Features Super quiet: Lower noise operation condition A-PAM DC inverter:With adoption of S-TYPE,S-PAM and PHASE control technology to works more stably at low-frequency,and is more energy-saving,mor powerful at high frequency. 10 Long distance air supplying:The indoor unit is improved by optimized motor,fan and air duct so as to provide long distance airflow with 12m+ maximum. -15 Heating: When -15 can still heating natural Comfortable sleep The setting temperature and the indoor noise can be adjusted to a more comfortable level when you set the “sleep mode” during night sleep. Super match:One outdoor unit can match two or more indoor unit. DIY auto mode: Adjust the last fixed operation mode automatically. Turbo mode: Quick cooling or heating Auto restart: Automatic return to previous operation conditions after sudden power blackout 24 hours timer: Use the timer function to set on,or off,or from on to off,or from off to on. Intergrative valve cover:The valve cover is Intergrative. 2-way piping design: The pipe can shoot out both from left or right side. Easy clean design: The panel is easy to wash and the airflow vents can be detached easily Double 8 display:The display is Double 8 mode. 7 Domestic air conditioner Specifications 3.Specifications NOMINAL DISTRIBUTION SYSTEM VOLTAGE Phase / 1 Frequency Hz 50 Voltage V 230 NOMINAL CAPACITY and NOMINAL INPUT cooling KW Capacity rated Btu/h heating 3.7(1.1-4.6) 3.6(1.0-4.0） 12280(3410-13650）12620(3750-15690) Power Consumption(Rated) KW 1.11 0.99 SEER/SCOP W/W 6.4 4.1 Annual energy consumption KWh 197 1092 Moisture Removal m³/h 1.6*10 ³ TECHNICAL SPECIFICATIONS Dimensions H*W*D mm 820 195*280 Packaged Dimensions H*W*D mm 909*279*355 Weight / KG 8.4 Gross weight / KG 10.5 Color / / White dB(A) 38/33/29 dB(A) 55 Sound Sound level pressure(Hi/Mid/Lo) Sound power(high) Domestic air conditioner Specifications TECHNICAL SPECIFICATIONS-PARTS cooling Type Fan Cross flow fan Motor W 20 Air flow rate(high) m³/h Speed(Hi/Mid/Lo) rpm 20 550 1100/950/800 1200/1050/900 Type Heat exchanger heating ML fin- Segment *stage*fitch 7HI-HX tube 3*14*1.4 Air direction control Right,Left,Horizontal,Downward Removable/Washable/Mildew Proof Air filter Microcomputer Control Temperature control Remote controller model 0010401715Y Note: the data are based on the conditions shown in the table below cooling heating Indoor: 27 DB/19 WB Indoor:20 DB Outdoor: 35 DB/24 WB Outdoor: 7 DB/6 WB 4 type Piping length 5m Conversation formulae Kcal/h= KW×860 Btu/h= KW×3414 cfm=m³/min×35.3 Sensors list Description Room and pipe sensor Its used for detecting room and evaporator temperature Qty 1 Domestic air conditioner Piping diagrams 5 Piping diagrams EEV EEV 10 Domestic air conditioner Printed circuit board connector wiring diagram 6.Printed circuit board connector wiring diagram Connectors PCB(1) (Control PCB) For 09K/12K 1) CN9 CN8 2) CN6 Connector for fan motor and feedback Connector for heat exchanger thermistor and Room temperature thermistor 3) CN5’ Connector for UP&DOWN STEP motor 4) CN11 CN11’ Connector for RIGHT&LEFT STEP motor 5) CN21 white line CN17(black line) Connector for indoor terminal N and L 6) CN7 Connector for display board 7) CON2 CON3 Connector for ion generator 8) CN23 (red line) Connector for communicate between the indoor board and the outdoor board 9) CN36 Connector for long-range control 10) CN34 Connector for wifi Module 11) CON1 Connector for fresh air 12) CN2 Connector for wired controller 13) CN51 Connector for room card Note: Other designations PCB(1) (Indoor Control PCB) 1) CN14 Connector for Forced operation ON / OFF switch 2) FUSE1 Fuse 3.15A/250VAC 1 2 3 4 PCB OFF A N_RC ON ON 35 UNIT MODEL JS035-D2 ON B RC ON OFF 33 JS035-D2 OFF OFF 23 PCB MODEL 0011800646A(26) J1 OFF J2 OFF DISPLAY SERIES 325/498 UNIT MODEL OFF ON 26 OFF ON 324 ON OFF 387 ON ON 317 DISPLAY MODEL 0011800387D 11 Domestic air conditioner Printed circuit board connector wiring diagram PCB(1) 12 Domestic air conditioner Printed circuit board connector wiring diagram Wiring diagrams INDOOR UNIT 0010561514 INDOOR UNIT DIAGRAM M C0N3 C0N2 CN21 N FUSE1 T3.15A/250VAC W R C0N1 CN9 CN52 (L) BL ION GENERATOR FRESH AIR CN2 WIRED CONTROLLER CN5' CN5 UP-DOWN STEPMOTOR CN11 CN11' CN23 S CN51 CN34 ON 1234 SW2 Y/G DC FAN MOTOR CN1 SW1 CN14 CN7 CN6 LEFT STEPMOTOR ROOM CARD WIFI EMERGENCY SWITCH DISPLAY BOARD AMBIENT TEMP.SENSOR PIPING TEMP.SENSOR W B CN10 R RIGHT STEPMOTOR Y/G Y/G 1(N)2 (L)3(C) BR BL GND POWER SUPPLY TO OUTDOOR UNIT Notes: 1.The dotted parts are optional. 2.The two pins of CN51 should be shorted, when the second channel(RC) of SW2 is selected. 13 R:Red B:Black W:White BL:Blue Y:Yellow BR:Brown Y/G:Yellow/Green Domestic air conditioner Functions and control 7.Functions and control 7.1 Main functions and control specification 7.1.1 Automatic operation When the running mode is turned to automation after starting the system, the system will first determine the running mode according to the current room temperature and then will run according to the determined mode. Tr in the following selection conditions means room temperature, Ts means setting temperature, Tp means temperature of indoor coil pipe TrıTs-3ć Choose Cooling Mode Tr˘Ts-3ć Choose Heating Mode After turning to the automation mode, the running mode can be switched between cooling mode, fan mode and heating mode according to the change of the indoor ambient temperature. But the automatic conversion between cooling mode and heating mode must be conducted after 15 minutes. 7.1.2 Cooling operation mode Temperature control range: 16ć---30ć Temperature difference: r1ć * Control features: When Tr˄input airflow˅>Ts˄set temperature˅+ temperature Backlash A, the compressor will be opened, the indoor fan will operate at the set speed and the mode signal will be sent to the outdoor system. When Tr˄input airflow˅ Ts˄set temperature˅ temperature Backlash B, the compressor will be shutted, the indoor fan will operate at the set speed and the mode signal will be sent to the outdoor system. The system will keep the original status if Tr= Ts. Airflow speed control: (temperature difference 1ć) Automatic: When TrTs+3ć, high speed. When Ts+1ćTr<Ts+3ć, medium speed When Tr<Ts+1ć, low speed When the sensor is off, low speed When the airflow speed has no delay from the high to low switching, the speed should be delayed for 3 minutes (remain at high speed for 3 minutes.) before the next switch. Manus: When the system is operating, you can set the high, medium or low speed manually. (When the sensor is on or off, the system will change the speed 2 seconds after receiving the signal.) *Airgate location control: the location for the airgate can be set according to your needs. *Defrosting function: preventing the frosting on the indoor heat exchanger (when cooling or dehumidifying). When the compressor works continuously for 6 minutes and the temperature of the indoor coils has been below one centigrade for 10 seconds, the compressor will be stopped and the malfunction will be recorded in the malfunction list. The indoor system will continue to run. When the temperature of the indoor coil is raised to 9ć, the compressor will be restarted again (the requirement of 3 minutes’ delay should be satisfied.) * timing system on/off function. * Dormant control function. 14 Domestic air conditioner Functions and control 7.1.3 Dehumidifying mode. * temperature control range: 16---30 * temperature difference: 1 Control feature: send the dehumidifying signal to the outdoor system. When Tr>Ts+2 , the compressor will be turned on, the indoor fan will operate at the set speed. , the outdoor system will operate at the high dehumidifying When Tr is between the Ts and Ts+2 frequency for 10 minutes and then at the low dehumidifying mode for six minutes. The indoor fan will operate at low speed. When Tr< Ts-1.5 , the outsystem will be stopped, the indoor fan will be stopped for 3 minutes and then turned to the low speed option. 1 All the frequency converses have a difference. Are1(COOL) Are2(DRY) Are3(STOP) * Wind speed control: Automatic: When Tr Ts+ 5 , high speed. When Ts+3 Tr< Ts+5 , medium speed. When Ts+2 Tr< Ts+3 , low speed. When Tr<Ts+2 , light speed. If the outdoor fan stopped, the indoor fan will be paused for 3 minutes. If the outdoor fan stopped for more than 3 minutes and the outdoor system still operates, the system will be changed into light speed mode. When the airflow speed has no delay from the high to low switching, the speed should be delayed for 3 minutes (remain at high speed for 3 minutes.) before the next switch. Manual: When the sensor is off or Tr< Ts+3 , the manual operation can not be made. (obligatory automatic operation.) *Airgate location control: the location for the airgate can be set according to your needs. *Defrosting function: preventing the frosting on the indoor heat exchanger (when cooling or dehumidifying). When the compressor works continuously for 6 minutes and the temperature of the indoor coils has been below 1 for 10 seconds, the compressor will be stopped and the malfunction will be recorded in the malfunction list. The indoor system will continue to run. When the temperature of the indoor coil is raised to 9 , the compressor will be restarted again (the requirement of 3 minutes’ delay should be satisfied.) * Coil protection (synchronic overheating protection) are installed for the four directions latch 15 Domestic air conditioner Functions and control malfunctions when dehumidifying. * Timing system on/off function. * Dormant control function. 7.1.4 Heating operation mode. * temperature control range: 16---30 * temperature difference: 1 * control feature: the temperature compensation is automatically added and the system will send the heating signals to the outdoor system. Ts, the outdoor compressor is turned on, the indoor fan will be at the cold air proof mode. If Tr+0.5 If Tr>Ts+1.5 , the outdoor system is turned off, the indoor fan will be at the heat residue sending mode. *Indoor fan control manual control: You can choose high, medium, low and automatic speed control. Automatic: When Tr<Ts, high speed. When Ts Tr Ts+2 , medium speed. When Tr> Ts+2 , low speed. When the airflow speed has no delay from the high to low switching, the speed should be delayed for 3 minutes (remain at high speed for 3 minutes.) before the next switch. *Airgate location control: the location for the airgate can be set according to your needs. Coldair proof operation 1. The fan control functions as below: SET 37 37 MID 35 25 35 LOW 25 SOFT 16 STOP * Residue heat sending. The indoor fan will send the residue heat at a low speed for 20 seconds. If other conditions are satisfied, when the compressor stops, the indoor system will operate at a light speed. The indoor fan will stop when the coil temperature is below the THHOT0. * Defrosting. When the system receives the defrosting signal from outdoors, the indoor fan will stop and the indoor temperature display won’t change. At the time, any indoor coil malfunctions will be neglected. When the outdoor defrosting finishes, the coil malfunction will still be neglected until the compressor has been started up for 30 seconds. The indoor temperature display will not change and the system operates at the cold air proof mode. * Automatic heating temperature compensation: when the system enters the heating mode, the 16 Domestic air conditioner Functions and control temperature compensation (4ć) will be added. When the status is switched off, the compensation will be erased. 7.1.5 Strength operation The system enters the mode after receiving the ‘strength signal’. Send strength operation signal to the outdoor system. The mode change finishes the strength operation. Entering ‘mute’, you can have normal operation or signal control such as timing to finish the strength operation. When the system is at the automatic option with the strength/ mute function, if the system enters the cooling mode, the cooling strength/ mute function will be offered; if the system enters the heating mode, then the heating strength/ mute function will be offered; if the system enters the airflow mode, there will be no strength/ mute function. 7.1.6 Mute operation The system enters the mode after receiving the ‘mute signal’. a. Mute heating: the airflow speed is slight, the system sends the mute signal to the outdoor system. b. mute cooling: the airflow speed is slight, the system sends the mute signal to the outdoor system. When the compressor operates, the airflow speed is mute speed. EEPROM is adaptable. Mute operation can not work under the dehumidifying and airflow-sending operation. 7.1.7 Air refreshing˄This model does not choose˅ After receiving the signal from the remote control, (HV series: the background light of the ‘health’ logo is green. HS series: the ‘health’ indicator will be lighted). If the fan operates, the Nano-Aqua operates to realize the ions sending function. If the indoor fan stops, the Nano-Aqua is turned off. When the Nano-Aqua is turned off, if the air refreshing system is turned on, the Nano-Aqua will be turned on when the fan operates. 7.1.8 Timing You can set 24 hours’ on/off timing accordingly. After the setting, the timing indicator will be lightened. Also, the light will be turning off after the timing is finished. The followings are several timing methods. 1.system /on timing: The timing indicator will be lightened and the indoor system is under the waiting mode. The light will be turned off when the timing is finished and the rest of the system will operate under a normal condition. The timing starts since the last reception of the timing signal. 2.system /off timing: When the system is turned on, the timing indicator is lightened, the rest of the system will operated under a normal condition. When set time comes, the indicator light will be turned off and the system will be turned off. If you have set the dormant functions, the order of your settings will be operated according to the timing settings. 3 .system /on and off timing: The settings will be completed according to the orders.. 17 Domestic air conditioner Functions and control 7.1.9 Dormant operation The dormant timing is an eight hours unadaptable one. The timing signs are shown on the V series board. (RC series show the dormant signal, the timing light is lighted on the 6 lights board). 2.1 Under the cooling/ dehumidifying operation, after the setting of the dormant operation, the set temperature will be raised for 1 centigrade after 1 hour’s operation and will be raised for 1 centigrade 1 hour later. The system will keep this status for 6 hours and then close. 2.2 Under the heating mode, after the setting of the dormant operation, the setting temperature will fall 2 centigrade after 1 hour’s operation and will fall 2 centigrade 1 hour later. 3 hours after the preceding operations, the set temperature will be raised for 1 centigrade and the system will keep this status for 3 hours and then close down. 2.3 During the dormant time, except the change of the system mode or a new press on the dormant setting keys, the timing of the 8 hours dormancy will take the first timing as the start time, any presses on other keys will not affect the original timing. 2.4 Indoor fan control under the dormant operation. If the indoor fan is at the high speed before the dormant operation setting, the speed will be turned to medium after the setting. If the fan is at the medium speed before the dormant setting, the speed will be turned to low after the setting. If the fan is at the low speed before the dormant setting, the speed will not change. 7.1.10 Urgent on/off input Press the urgency button the buzzer will ring. The system will enter the automatic mode if you don’t press the button for more than 5 seconds. Under the system off mode, if you press the urgency key for 5 to 10 seconds, the system will start the test operation. Under the system off mode, if you press the urgency key for 10 to 15 seconds, the display screen will show the resume of the last malfunction. If the system is under operation, the press on the urgency key will stop it. Under the system off mode, the display screen will show automatic running sign. Under the system off mode, the system will not receive the remote control signal if the press on the urgency key doesn’t last for 15 seconds or if the key is loosened. Urgency operation: If you press the urgency key for less than 5 seconds, the buzzer will ring when you press the on/off key. The system will enter the urgency operation when the urgency key is loosened. The urgency operation is fully automatic. Test operation. The inlet temperature sensor doesn’t work, the indoor fan and the indoor air direction board motor works synchronically. High speed airflow, cooling, outdoor system on, etc, will send the ambient temperature 30 centigrade and coil temperature 16 centigrade information to the outdoor system. Test operation The defrost protection of the evaporator doesn’t work. The temperature control doesn’t work. The test operation will be finished in 30 minutes. The test operation can be stopped by the relative commands from the remote control. 18 Domestic air conditioner Functions and control 7.1.11 Low load protection control In order to prevent the frosting of the indoor heat interaction device, the outdoor system will be stopped if the indoor heat interaction temperature is below 1ć centigrade for 5 minutes, but the fan will continue to operate. The outdoor system will be started again when the heat interaction temperature is above 9 centigrade and the system has been stopped for 3 minutes. The malfunction will be stored in the malfunction resume and will not be revealed 7.1.12 High load protection control The outdoor system will be stopped if the coil temperature is above 63ć for 2 minutes. The indoor fan will be controlled by the thermostat. The outdoor system can be restarted when the coil temperature is below 45ć and the system has been stopped for 3 minutes. The malfunction will be stored in the malfunction resume and will not be revealed. 7.1.13 Abnormal operation of indoor system When the outdoor system operates, if the indoor system operation differs from the outdoor system, the abnormal operation malfunction will be reported. 10s after the report, the indoor system will be closed. Outdoor system mode Indoor system mode conflicts cooling heating yes cooling cooling no cooling airflow no heating heating no heating airflow yes heating cooling yes 7.1.14 Malfunction list resume. Nothing is presented if there is no code list. The malfunction display will automatically finish in 10 seconds. The remote control only receives the signals for stop. According to the signals, the malfunction resume presentation finishes. The resume restores after the power supply restores. 7.1.15 Abnormality confirmation approaches 1. indoor temperature sensor abnormality: Under the operation, the normal temperature ranges from 120 degree to -30 degree. When the temperature goes beyond this range, the abnormality can be confirmed. If the temperature goes back into the range, the system will automatically resume. 2 .indoor heat interaction sensor abnormality: Under the operation, the normal temperature ranges from 120 degree to -30 degree. When the 19 Domestic air conditioner Functions and control temperature goes beyond this range, the abnormality can be confirmed. If the temperature goes back into the range, the system will automatically resume. 3 .indoor malfunction: Out door malfunction: When the indoor system receives the outdoor malfunction codes, it will store the code into E2 for the malfunction list resume. The indoor system will continue to operate according to the original status, the malfunction code will not be revealed or processed. 4. transmission abnormality: If the indoor system can’t receive the outdoor system for 8 minutes, the communication abnormality can be confirmed and reported and the outdoor system will be stopped. 7.1.16 Single indoor system operation * Enter condition: First, set the high speed airflow and 30 centigrade set temperature, then press the dormant keys for 6 times within 7 seconds, the system will feedback with 6 rings. * After the system enters the separate indoor system operation mode, the indoor system will operate according to the set mode and neglect the communication signals of the outdoor system. However, it has to send signals to the outdoor system. * Quitting condition: This mode can be quitted after receiving the quitting signal from the remote control or urgency system. The indoor system thus can quit the single operation mode. 7.1.17 Power cut compensation * Entering condition: Press dormant button 10 times within 7 second, the buzzer will ring 4 times and the present system status will be stored into the EEPROM of the indoor system. * After entering the power cut compensation mode, the processing of the indoor system should be as the followings: Remote control urgency signal: operate according to the remote control and the urgent conditions, the present status will be stored into the EEPROM of the indoor system. * Quitting conditions: Press dormant button 10 times within 7 seconds and the buzzer will ring twice. 7.1.18 Test program First, connect the test program terminal on the mainboard. Then connect the system to the power circuit. The test program will operate as follows. HV series display: The buzzer rings for one time—the signal will be sent to outdoor system for 0.5 second— the violet is sent for 0.5-- the background light turns to white—the back ground light turns to white—the background light turns to white—the background light is fully lighted for 0.5 second—LED screen lights for 0.5 second— the step-in motor fully output for 0.5 second—then the motor doesn’t output for 0.5 second—the motor fully output again for 0.5 second. The test program finishes. 7.1.19 Time cutting function: Connect the test program terminal on the mainboard after connecting the system to the power circuit. The CPU of the main control will be 60 times faster. 20 Domestic air conditioner Functions and control 7.2 Value of thermistor Room sensor and Pipe Sensor R25ć=10K¡f2% B25ć/50ć=3700Kf2% Temp.((ć)) Max.(K) Normal(K) Min.(K) -30 165.2170 147.9497 132.3678 -1.94 1.75 -29 155.5754 139.5600 125.0806 -1.93 1.74 -28 146.5609 131.7022 118.2434 -1.91 1.73 -27 138.1285 124.3392 111.8256 -1.89 1.71 -26 130.2371 117.4366 105.7989 -1.87 1.70 -25 122.8484 110.9627 100.1367 -1.85 1.69 -24 115.9272 104.8882 94.8149 -1.83 1.67 -23 109.4410 99.1858 89.8106 -1.81 1.66 -22 103.3598 93.8305 85.1031 -1.80 1.64 -21 97.6556 88.7989 80.6728 -1.78 1.63 -20 92.3028 84.0695 76.5017 -1.76 1.62 -19 87.2775 79.6222 72.5729 -1.74 1.60 -18 82.5577 75.4384 68.8710 -1.72 1.59 -17 78.1230 71.5010 65.3815 -1.70 1.57 -16 73.9543 67.7939 62.0907 -1.68 1.55 -15 70.0342 64.3023 58.9863 -1.66 1.54 -14 66.3463 61.0123 56.0565 -1.64 1.52 -13 62.8755 57.9110 53.2905 -1.62 1.51 -12 59.6076 54.9866 50.6781 -1.60 1.49 -11 56.5296 52.2278 48.2099 -1.58 1.47 -10 53.6294 49.6244 45.8771 -1.56 1.46 -9 50.8956 47.1666 43.6714 -1.54 1.44 -8 48.3178 44.8454 41.5851 -1.51 1.42 -7 45.8860 42.6525 39.6112 -1.49 1.40 -6 43.5912 40.5800 37.7429 -1.47 1.39 -5 41.4249 38.6207 35.9739 -1.45 1.37 -4 39.3792 36.7676 34.2983 -1.43 1.35 -3 37.4465 35.0144 32.7108 -1.41 1.33 -2 35.6202 33.3552 31.2062 -1.38 1.31 -1 33.8936 31.7844 29.7796 -1.36 1.29 0 32.2608 30.2968 28.4267 -1.34 1.28 1 30.7162 28.8875 27.1431 -1.32 1.26 2 29.2545 27.5519 25.9250 -1.29 1.24 3 27.8708 26.2858 24.7686 -1.27 1.22 4 26.5605 25.0851 23.6704 -1.25 1.20 5 25.3193 23.9462 22.6273 -1.23 1.18 6 24.1432 22.8656 21.6361 -1.20 1.16 22 Tolerance(ć) Domestic air conditioner Functions and control 7 23.0284 21.8398 20.6939 -1.18 1.14 8 21.9714 20.8659 19.7982 -1.15 1.12 9 20.9688 19.9409 18.9463 -1.13 1.09 10 20.0176 19.0621 18.1358 -1.11 1.07 11 19.1149 18.2270 17.3646 -1.08 1.05 12 18.2580 17.4331 16.6305 -1.06 1.03 13 17.4442 16.6782 15.9315 -1.03 1.01 14 16.6711 15.9601 15.2657 -1.01 0.99 15 15.9366 15.2770 14.6315 -0.98 0.96 16 15.2385 14.6268 14.0271 -0.96 0.94 17 14.5748 14.0079 13.4510 -0.93 0.92 18 13.9436 13.4185 12.9017 -0.91 0.90 19 13.3431 12.8572 12.3778 -0.88 0.87 20 12.7718 12.3223 11.8780 -0.86 0.85 21 12.2280 11.8126 11.4011 -0.83 0.83 22 11.7102 11.3267 10.9459 -0.81 0.80 23 11.2172 10.8634 10.5114 -0.78 0.78 24 10.7475 10.4216 10.0964 -0.75 0.75 25 10.3000 10.0000 9.7000 -0.75 0.75 26 9.8975 9.5974 9.2980 -0.76 0.76 27 9.5129 9.2132 8.9148 -0.80 0.80 28 9.1454 8.8465 8.5496 -0.84 0.83 29 8.7942 8.4964 8.2013 -0.87 0.86 30 8.4583 8.1621 7.8691 -0.91 0.90 31 8.1371 7.8428 7.5522 -0.95 0.93 32 7.8299 7.5377 7.2498 -0.98 0.97 33 7.5359 7.2461 6.9611 -1.02 1.00 34 7.2546 6.9673 6.6854 -1.06 1.04 35 6.9852 6.7008 6.4222 -1.10 1.07 36 6.7273 6.4459 6.1707 -1.13 1.11 37 6.4803 6.2021 5.9304 -1.17 1.14 38 6.2437 5.9687 5.7007 -1.21 1.18 39 6.0170 5.7454 5.4812 -1.25 1.22 40 5.7997 5.5316 5.2712 -1.29 1.25 41 5.5914 5.3269 5.0704 -1.33 1.29 42 5.3916 5.1308 4.8783 -1.37 1.33 43 5.2001 4.9430 4.6944 -1.41 1.36 44 5.0163 4.7630 4.5185 -1.45 1.40 45 4.8400 4.5905 4.3500 -1.49 1.44 46 4.6708 4.4252 4.1887 -1.53 1.47 47 4.5083 4.2666 4.0342 -1.57 1.51 48 4.3524 4.1145 3.8862 -1.61 1.55 49 4.2026 3.9686 3.7443 -1.65 1.59 23 Domestic air conditioner Functions and control 50 4.0588 3.8287 3.6084 -1.70 1.62 51 3.9206 3.6943 3.4780 -1.74 1.66 52 3.7878 3.5654 3.3531 -1.78 1.70 53 3.6601 3.4416 3.2332 -1.82 1.74 54 3.5374 3.3227 3.1183 -1.87 1.78 55 3.4195 3.2085 3.0079 -1.91 1.82 56 3.3060 3.0989 2.9021 -1.95 1.85 57 3.1969 2.9935 2.8005 -2.00 1.89 58 3.0919 2.8922 2.7029 -2.04 1.93 59 2.9909 2.7948 2.6092 -2.08 1.97 60 2.8936 2.7012 2.5193 -2.13 2.01 61 2.8000 2.6112 2.4328 -2.17 2.05 62 2.7099 2.5246 2.3498 -2.22 2.09 63 2.6232 2.4413 2.2700 -2.26 2.13 64 2.5396 2.3611 2.1932 -2.31 2.17 65 2.4591 2.2840 2.1195 -2.36 2.21 66 2.3815 2.2098 2.0486 -2.40 2.25 67 2.3068 2.1383 1.9803 -2.45 2.29 68 2.2347 2.0695 1.9147 -2.49 2.34 69 2.1652 2.0032 1.8516 -2.54 2.38 70 2.0983 1.9393 1.7908 -2.59 2.42 71 2.0337 1.8778 1.7324 -2.63 2.46 72 1.9714 1.8186 1.6761 -2.68 2.50 73 1.9113 1.7614 1.6219 -2.73 2.54 74 1.8533 1.7064 1.5697 -2.78 2.58 75 1.7974 1.6533 1.5194 -2.83 2.63 76 1.7434 1.6021 1.4710 -2.88 2.67 77 1.6913 1.5528 1.4243 -2.92 2.71 78 1.6409 1.5051 1.3794 -2.97 2.75 79 1.5923 1.4592 1.3360 -3.02 2.80 80 1.5454 1.4149 1.2942 -3.07 2.84 81 1.5000 1.3721 1.2540 -3.12 2.88 82 1.4562 1.3308 1.2151 -3.17 2.93 83 1.4139 1.2910 1.1776 -3.22 2.97 84 1.3730 1.2525 1.1415 -3.27 3.01 85 1.3335 1.2153 1.1066 -3.32 3.06 86 1.2953 1.1794 1.0730 -3.38 3.10 87 1.2583 1.1448 1.0405 -3.43 3.15 88 1.2226 1.1113 1.0092 -3.48 3.19 89 1.1880 1.0789 0.9789 -3.53 3.24 90 1.1546 1.0476 0.9497 -3.58 3.28 91 1.1223 1.0174 0.9215 -3.64 3.33 92 1.0910 0.9882 0.8942 -3.69 3.37 24 Domestic air conditioner Functions and control 93 1.0607 0.9599 0.8679 -3.74 3.42 94 1.0314 0.9326 0.8424 -3.80 3.46 95 1.0030 0.9061 0.8179 -3.85 3.51 96 0.9756 0.8806 0.7941 -3.90 3.55 97 0.9490 0.8558 0.7711 -3.96 3.60 98 0.9232 0.8319 0.7489 -4.01 3.64 99 0.8983 0.8088 0.7275 -4.07 3.69 100 0.8741 0.7863 0.7067 -4.12 3.74 101 0.8507 0.7646 0.6867 -4.18 3.78 102 0.8281 0.7436 0.6672 -4.23 3.83 103 0.8061 0.7233 0.6484 -4.29 3.88 104 0.7848 0.7036 0.6303 -4.34 3.92 105 0.7641 0.6845 0.6127 -4.40 3.97 106 0.7441 0.6661 0.5957 -4.46 4.02 107 0.7247 0.6482 0.5792 -4.51 4.07 108 0.7059 0.6308 0.5632 -4.57 4.12 109 0.6877 0.6140 0.5478 -4.63 4.16 110 0.6700 0.5977 0.5328 -4.69 4.21 111 0.6528 0.5820 0.5183 -4.74 4.26 112 0.6361 0.5667 0.5043 -4.80 4.31 113 0.6200 0.5518 0.4907 -4.86 4.36 114 0.6043 0.5374 0.4775 -4.92 4.41 115 0.5891 0.5235 0.4648 -4.98 4.45 116 0.5743 0.5100 0.4524 -5.04 4.50 117 0.5600 0.4968 0.4404 -5.10 4.55 118 0.5460 0.4841 0.4288 -5.16 4.60 119 0.5325 0.4717 0.4175 -5.22 4.65 120 0.5194 0.4597 0.4066 -5.28 4.70 25 Domestic air conditioner Service diagnosis 8.Dimensional drawings unit:mm 9.Center of gravity unit:mm Domestic air conditioner 26 Service diagnosis 10. Service Diagnosis 10.1 Caution for Diagnosis The operation lamp flashes when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions, disabling equipment operation. 2. When a signal transmission error occurs between the indoor and outdoor units. In either case, conduct the diagnostic procedure described in the following pages. Parameter of primary electronic appliance NO N am e P a r a m e te r P ic t u r e R ated voltage: DC310V 1 F an m otor R ated current:0 .2A R ated frequen c y:50/60Hz 10.2 Problem Symptoms and Measures Symptom None of the units operates Operation sometimes stops. Equipment operates but does not cool, or does not heat (only for heat pump) Check Item Check the power supply. Check the indoor PCB Details of Measure Check to make sure that the rated voltage is supplied. Check to make sure that the indoor PCB is broken Check the power supply. A power failure of 2 to 10 cycles can stop air conditioner operation. Check for faulty operation of the electronic expansion valve. Set the units to cooling operation, and compare the temperatures of the liquid side connection pipes of the connection section among rooms to check the opening and closing operation of the electronic expansion valves of the individual units. Diagnosis by service port pressure and operating current. Check for insufficient gas. Large operating Check the noise and condition. vibrations Check to make sure that the required spaces for installation installation (specified in the Technical Guide, etc.) are provided. 27 Domestic air conditioner Service diagnosis 10.3 Error Codes and Description indoor display Code indication Indoor displaying panel code indication Only For 498 and Outdoor 498A display (LED1 flash Other display (Red/Green Time times) Run □On★Flash■ Off) Indoor and Outdoor E7 E1 Indoor E2 Malfunction E4 E14 E5 E9 F12 F1 F22 Directly display Directly display Directly display Directly display Directly display Trouble record Trouble record Directly display Directly display Directly display F3 F20 Directly display Trouble record F19 Trouble record F27 Directly display F4 F8 F21 F7 Directly display Trouble record Directly display Directly display Outdoor Malfunction F6 Directly display F25 F13 F14 F11 F28 Directly display Trouble record Trouble record Directly display Directly display F15 Trouble record F2 Trouble record F23 F9 F24 F34 F35 F43 Trouble record Trouble record Trouble record Trouble record Trouble record / ■ ■ ★ 15 ★ ★ ★ ■ □ □ ■ □ ★ ■ □ □ □ ■ ■ ★ ★ ★ ■ □ ★ ★ ★ ★ ■ ★ ■ / / / / 22 21 1 2 3 ■ ★ ■ 4 ■ ★ □ 5 ■ ★ □ 6 ■ ★ ■ 7 ■ ★ ■ 8 ■ □ ■ ★ □ □ ★ ★ ■ 9 10 11 □ ★ ■ 12 ★ □ ■ 13 ■ ■ ■ ■ ★ ★ ★ ★ □ □ ■ ■ 16 17 18 19 ■ ★ □ 20 ■ ★ □ 24 ■ ★ □ 25 / ■ ★ / ★ □ ★ ■ 26 27 37 38 46 ★ ■ ■ 28 fault description Communication fault between indoor and outdoor units Indoor temperature sensor failure Indoor coil sensor failure Indoor eeprom failure Indoor fan failure Internal unit antifreeze protection Internal unit overload Eeprom failure IPM failure AC current overcurrent protection Communication error between module board and main PCB board. High pressure protection Power over/under voltage protection Compressor stall / press instantaneous stop Compressor discarging temperature protection Abnormal of DC motor Abnormal of piping sensor Suction temperature sensor failure Abnormal of outdoor ambient sensor Abnormal of compressor discharge sensor Lack of refrigerant 4-way valve reverse failure Compressor jam (only for spdu) Module PWM select circuit error Outdoor terminal block temperature protection Instantaneous over-current protection of the compressor Compressor U-phase overcurrent Compressor V-phase overcurrent Compressor W-phase overcurrent Module reset CT disconnection Outdoor coil protection Compressor driver board failure Model matching abnormality Reference Page Page.39 Page.29 Page.29 Page.30 Page.31 / Page.42 Page.30 Page.34 Page.35 Page.36 / Page.37 / Page.38 Page.32 Page.29 Page.29 Page.29 Page.29 / / Page.41 Page.41 / Page.35 Page.35 / / / / / Domestic air conditioner Service diagnosis 10.3.1 Thermistor or Related Abnormality ƾƵƵE1: Room temperature sensor failure ƾƶƶE2: Heat-exchange sensor failure LED1 flash 10 times˖Defrost temperature sensor failure LED1 flash 11 times˖Suction temperature sensor failure LED1 flash 12 times˖Ambient temperature sensor failure LED1 flash 13 times˖Discharge temperature sensor failure Indoor Display Outdoor display Method of Malfunction Detection Malfunction Decision Conditions The temperatures detected by the thermistors are used to determine thermistor errors When the thermistor input is more than 4.92V or less than 0.08V during compressor operation. z Note: The values vary slightly in some models Supposed Causes Ŷ Faulty connector connection Ŷ Faulty thermistor Ŷ Faulty PCB Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, else parts damage may be occurred. or Check the connector connection. NO Correct the connection Is it normal? Yes Thermistor resistance check NO Replace the thermistor Is it normal? Yes Replace the indoor unit PCB Thermistor resistance check method: Remove the connector of the thermistor on the PCB, and measure the resistance of thermistor using tester.The relationship between normal temperature and resistance is shown in the value of indoor thermistor. 29 Domestic air conditioner Service diagnosis 10.3.2 EEPROM abnormal Indoor Display Indoor display ƾƶƾE4: Indoor EEPROM error ƵƾƵ F12: Outdoor EEPROM error; Outdoor LED1 flash 1 times Method of Malfunction Detection The Data detected by the EEPROM are used to determine MCU Malfunction Decision Conditions When the data of EEPROM is error or the EEPROM is damaged Supposed Causes Troubleshooting Ŷ Faulty EEPROM data Ŷ Faulty EEPROM Ŷ Faulty PCB * Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Replace the indoor or outdoor mainboard. 30 Domestic air conditioner Service diagnosis 10.3.3 Indoor DC fan motor malfunction Indoor Display E14 Method of Malfunction Detection The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation Malfunction Decision Conditions when the detected rotation feedback signal don’t received in 2 minutes Supposed Causes Operation halt due to breaking of wire inside the fan motor. Operation halt due to breaking of the fan motor lead wires Detection error due to faulty indoor unit PCB Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or else parts damage may be occurred. NO Check whether terminals on indoor pcb is well Pull out the term inals on the indoor mainboard and reinsert them. YES Turn off power switch,and pull out the fan motor. Measure t he resistanc e s between b al ck l in e ( 0 V ) and w hi te line(15V) ,balck line (0V)and red line(310V) of indoor fan motor . The resistances range is between 30KΩ with 2MΩ YES the ind oor pcb is dam aged and need replace NO The indoor fan motor is damaged and need replace 31 Domestic air conditioner Service diagnosis 10.3.4 Outdoor DC fan motor fault Outdoor display Ƶƾƶ)LED1 flash 9 times Method of DC fan motor is detected by checking the fan running condition and so on Malfunction Detection Malfunction Decision Conditions when the data of EEPROM is error or the EEPROM is damaged Supposed Ƶ DC fan motor protection dues to the DC fan motor faulty Causes Ƶ DC fan motor protection dues to faulty PCB Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, may be occurred. 32 or parts damage Domestic air conditioner Service diagnosis Check whether Terminal on the outdoor mainboard is well inserted. NO it is normal Reinsert the terminals YES Electrify the machine again and turn it on in the Cool state with the remote controller. check whether the motor could run. The motor and outdoor pcb are well YES NO R emove fan motor a f t e r s witch off the power.Measure the resistances between black line(0V) and red line( 310V),between black line(0V) a nd w hi t e l i n e( 1 5 V ) of the fan motor . The resistances are greater than 40K¡ YES the resistances between 0V and 310V,between 0V and 15V of the fan terminal of outdoor pcb are greater than 10M¡. YES The module pcb is damaged, replace it with a new one. NO The motor of the outdoor unit is damaged and needs replacing. NO The outdoor pcb is damaged, replace it with a new one. 33 Domestic air conditioner Service diagnosis 10.3.5 IPM protection Outdoor display: ƶ ƾ ƾ/ F1 LED1 flash 2 times Method of Malfunction Detection IPM protection is detected by checking the compressor running condition and so on Malfunction Decision Conditions Ŷ The system leads to IPM protection due to over current Ŷ The compressor faulty leads to IPM protection Ŷ circuit component of IPM is broken and led to IPM protection Supposed Causes Ŷ IPM protection dues to the compressor faulty Ŷ IPM protection dues to faulty PCB of IPM module Ŷ Compressor wiring disconnected Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, else parts damage may be occurred. <(6 or 12 34 <(6 12 Domestic air conditioner Service diagnosis 10.3.6 Over-current of the compressor Outdoor Display: ƵƾƶF2 LED1 flash 3 or 24 or 25 times Method of Malfunction Detection The current of the compressor is too high Malfunction Decision Conditions when the IPM Module is damaged or the compressor is damaged. power supply voltage is too low or too high Supposed Causes Troubleshooting Ŷ Faulty IPM Module Ŷ Faulty compressor Ŷ Faulty power supply * Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Electrify the machine again and turn it on with the remote controller, If malfunctions are reported before or upon the compressor being started up, YES IPM Module is damaged and needs replacing. NO The compressor is started normally, but malfunctions are reported after it has run for some time. Check the power supply is too low or too high Yes Repair the power supply NO NO The system may have been over or under charged with gas, which can be judged through the pressure of the measuring system. 35 Domestic air conditioner Service diagnosis 10.3.7 The communication fault between IPM and outdoor PCB Outdoor display: ƵƾƵ)LED1 flash 4 times Method of Malfunction Detection Communication is detected by checking the IPM module and the outdoor PCB Malfunction Decision Conditions Ŷ The outdoor PCB broken leads to communication fault Ŷ The IPM module broken leads to communication fault Ŷ The outdoor PCB is broken Ŷ The IPM module is broken Ŷ Communication wiring disconnected Supposed Causes Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, parts damage may be occurred. or else 1) Check whether Terminal CN23 and CN24 on the outdoor mainboard CN10 and CN11 on IPM module 2) Check whether the connected wire between IPM and outdoor NO 1) Pull out and reinsert the terminals. 2) Replace connected wire Are they good? Malfunction unsolved YES Electrify the machine again and turn it on, Check whether the voltage between 1 and 2 of Terminal CN23 is about DC5V, Check whether the voltage between2 and 3 of Terminal CN23 is about DC15V, YES Replace the outdoor IPM module with a new one. NO Replace the outdoor mainboard with a new one 36 Domestic air conditioner Service diagnosis 10.3.8 Power Supply Over or under voltage fault Outdoor display: Ƶƾƶ) LED1 flash 6 times The power supply is over voltage Method of Malfunction Detection An abnormal voltage rise or fall is detected by checking the specified voltage detection circuit. Malfunction Decision Conditions An voltage signal is fed from the voltage detection circuit to the microcomputer Ŷ Supply voltage not as specified Ŷ the IPM module is broken Ŷ the outdoor PCB is broken Supposed Causes Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or else parts damage may be occurred. Electrify the machine again and turn it on with the remote controller. Check whether the compressor is started normally Yes Is it ok? Maybe there is some disturbance No Yes Test the outdoor power supply (+310VDC) with a multimeter. check whether the power is >150 V or <390V? Change the IPM module NO Yes Change the IPM module ~230 is ok? NO This question may be caused by the power. Repair the power supply. 37 Domestic air conditioner Service diagnosis 10.3.9 Overheat Protection For Discharge Temperature Outdoor display: ƵƾƵ F4 LED1 flash 8 times Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting The Discharge temperature control is checked with the temperature being detected by the Discharge pipe thermistor when the compressor discharge temperature is above 110ć Ŷ Electronic expansion valve defective Ŷ Faulty thermistor Ŷ Faulty PCB * Caution Be sure to turn off power switch before connect or disconnect connector, else parts damage may be occurred. or Electrify the machine again and turn it on with the remote controller, then measure the temperature at the exhaust temperature sensor of the compressor on the outdoor unit The temperature exceeds 110 ć shortly after the machine starts up? 1) The cryogen may have been leaked during installation, or there may be leakage in the piping system. 2) There may be other causes to make the exhaust temperature too high. YES NO Malfunctions occur after running for some time even though the measured temperature is below 110ć. Pull out the exhaust sensor and measure its resistance at standard temperatures according to the resistance-temperature table YES The results much? The sensor is damaged. Replace the sensor with a new one. deviate NO The outdoor mainboard is damaged and needs be replaced 38 Domestic air conditioner Service diagnosis 10.3.10 The communication fault between indoor and outdoor Indoor display outdoor display Method of Malfunction Detection ƵƵƾ E7 LED1 flash 15 times Communication is detected by checking the indoor PCB and the outdoor PCB. Ŷ The outdoor PCB broken leads to communication fault. Ŷ The indoor PCB broken leads to communication fault. Malfunction Decision Conditions Ŷ Ŷ Ŷ Ŷ Supposed Causes Troubleshooting Communication wiring disconnected. The indoor PCB is broken. The outdoor PCB is broken. The Module PCB is broken. * Caution Be sure to turn off power switch before connect or disconnect connector, or else parts damage may be occurred. Restart the a/c and it becomes normally. YES The outdoor mainboard needs dehumidification. NO If starting up normally, but malfunction occurs again after a while NO The outdoor mainboard needs dedust. YES Check whether the linking cable between the indoor and outdoor is well connected or whether its core wires are well insulated or its L/N is not reversed. Reconnect the linking cable or replace the linking cable with new one. NO YES Check the indoor mainboard˖only indoor YES charged. Measure the voltage between 3 and 4 of IC6 on the indoor mainboard with a multimete .And measure the voltage between CN23(C) and CN21(L) with a multimeter . (A) 39 Domestic air conditioner Service diagnosis (A) If the voltage is a constant value of 0V DC to 5V DC.Or the voltage between Communication line(red ) and N(white line) is not close to18V DC when only indoor charged. The indoor mainboard is damaged; replace it with a new one. YES NO Test the outdoor power is supply 230VAC with a multimeter when indoor and outdoor are charged. NO Check the cable between outdoor and power YES NO LED2 light of the outdoor The module pcb is damaged, replace it with a new one. YES YES Led1 light Measure the voltage Between 3 and 4 of IC9 on the Outdoor mainboard with a Multimete . The voltage is a constant value of 0V DC to 5V DC NO Remove fan motor after switch off the power and restart the a/c ,the led 1 becomes light or flash. The outdoor pcb is damaged, replace it with a new one. The outdoor pcb is well,and then check the cable NO YES YES Fan motor is damagedˈreplace it with a new one. NO Test the fan motor terminal resistance between pin 310V and 0V,or pin15V and 0V of CN22 are close to 0m¡ with a multimeter DIWHUVZLWFKRIIWKHSRZHU NO Remove the connection cable between CN23 of outdoor pcb and CN10 of module pcb,The led1 becomes light or flash. YES The module pcb is damaged, replace it with a new one. NO YES The outdoor pcb is damaged, replace it with a new one. 40 Domestic air conditioner Service diagnosis 10.3.11 Loss of synchronism detection Inverter side current detection is abnormal Outdoor Display ƵƾƵ?)LED1 flash 18 times ƵƾƵ?) LED1 flash 19 times Method of Malfunction Detection The position of the compressor rotor can not detected normally Malfunction Decision Conditions Supposed Causes Troubleshooting when the wiring of compressor is wrong or the connection is poor; or the compressor is damaged Ƶ Faulty The wiring of compressor Ƶ Faulty compressor Ƶ Faulty PCB * Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. NO Within 3 minutes after the machine is supplied with power and turned on with the remote controller, check whether the compressor can start up 1. The wiring of compressor is incorrect or the connection is poor; 2. The compressor is damaged YES YES At first, the compressor start up ,soon the compressor stopped with the LED1 on the outdoor PCB blinks˄1Hz˅19/18 times IPM Module is damaged and needs replacing. Malfunction unsolved the Maybe there is some disturbance 41 Malfunctions exist also, the compressor is damaged replace a new one Domestic air conditioner Service diagnosis 10.3.12 High work-intense protection ƾƾƾ?( LED1 flash 21 times Outdoor display Method of Malfunction Detection High work-intense control is activated in the heating mode if the temperature being sensed by the heat exchanger thermistor exceeds the limit. Malfunction Decision Conditions Activated when the temperature being sensed by the heat exchanger rises above 65ć twices in 30 minutes. Ƶ Ƶ Ƶ Ƶ Supposed Causes Troubleshooting Faulty electronic expansion valve Dirty heat exchanger Faulty heat-exchange sensor Insufficient gas * Caution Be sure to turn off power switch before connect or disconnect connector, else parts damage may be occurred. or Electrify the machine again and turn it on with the remote controller, check whether the wind temperature is below 65ć The malfunction is reported after the machine has run for some time? YES 1 ǃ Check room temperature and pipe temperature sensor. 2ǃthe temperature monitoring circuit of the indoor mainboard NO The indoor unit blows poorly due to blocked filters or poor condition of the fan? YES 1) Clean the filters 2) Reinstall the fan. NO Use some tools to measure the pressure of systemˈ 42 Domestic air conditioner Circuit diagrams 11. Circuit Diagrams +5V 2K +5V 2 R54 10K J3 +5V R29 10K SCL SDA R56 4 3 2 JP3 1 1TJC8-04 1K 4 3 2 1 SW2 10K 5 6 7 8 +5V IC2 R5F212A7SNFA C2 100nF BM 25/35 A/B C28 C20 2K 2K R104 2K R69 R7 100nF 100nF +5V R37 10K 10K 10K R103 20K 10K R102 P33/SSI P34/SDA/SCS MODE P43/XCIN P44/XCOUT RESET P47/XOUT VSS/AVSS P46/XIN VCC/AVCC P54/TCIOD P53/TCIOC P52/TCIOB P51/TCIOA/TCTRG P50/TCCLK P27/TDIOD1 R33 560Ω 100nF +5V C18 NDI-04H R36 R60 - +5V 390Ω 5267-04A- TL P421 IC7 1nF C14 1K 10K R39 C16 100nF +5V +5V R94 10K 1 2 MODE 3 4 3-4-HXF 5 3-5-SW RST 6 7 8 9 10 11 12 13 14 15 16 TL P421 1K 10K BUZZ 8M-±0.5% DSTEP _A DSTEP _B DSTEP _C DSTEP _D USTEP _A 3-1-N R30 +5V 10K C11 100nF IC1 1 8 A0 VCC 2 7 A1 WP 3 6 A2 SCL JP4 4 5 4 +5V GND SDA 3 M24C04 2 RST EEPROM 1 MODE C1 100nF P1 TJC8-04 2SA1037AK R11 RST R23 10K 100uF-16V 2 ) R5 R2 E2 C6 C37 1nF 100nF XT1 JP1 2 1 TJC8-02( / IC3 R59 10K R64 10K 4.7uF-50V-105 E14 R68 10K E15 +5V CN34+5V 1 GND 2 TX 3 RX 4 R70 R72 R74 R75 K I1/AN9/P11 K I2/AN10/P12 K I3/AN11/P13 (INT2)/P32 (INT1)/P36 TAO/P30 TBO/P31 TXD2/P63 RXD2/P64 (CL K 1)/CLK 2/P65 RXD1/INT3/P67 TXD1/INT2/P66 INT0/P45 TEO/P60 TFO00/P80 TFO01/P81 C24 R88 10K 10nF R108 1K R97 100Ω R98 100Ω R86 R49 1K R42 2 10K 2 +5V 10K R27 1K 1K +5V 1 10nF C3 R24 R25 R109 J1 1 1K J2 10K 10K 10K 10K ROOM PIPE C29 10nF R28 48 47 DIG_MODE R53 10K 46R83 10K R6 45R93 DIGL DIGH R16 44 43 42 R18 41 SER 3-41-COMM_TX 40 R17 RCK 3-40-COMM_RX R21 39 SRCK R31 38 IR 37 C19 36 35 34 33 4.7K ±1% R95 10K R101 10K C21 - R73 10K +5V 10K 4.7K R106 R43 10K N2 27Ω-0805 R38 10K PIPE R OOM KRC119S - R35 +12V 10K D15 CN36 3 RL S4148 2 1 B3B-XH- A- D16 RL S4148 - CN7' 4-1971798-11 IR CN6 2 RCK +5V 4 3 SER 3 4 SRCK 2 5 GG 1 6 GND 7 5V C30 4.7uF-1206 8 DIGH 9 DIGL C31 4.7uF-1206 10 MODE +5V IR 100Ω CN7 100Ω 1 COM3 100Ω 2 COM2 E1 3 +5V 4 GND 100uF-16V 5 SER 6 RCK 7 SRCK 8 IR R62 10K +5V B8B-PH-K -S3 R53,R6,R16,R18,R17,R21 100Ω 100Ω 100Ω 1K +5V 1K 10nF N1 2SD1781KT146R SW1 TSVC- 1 C12 100nF R99 CN51 2K 1 2K 2 R100 B2B-XH- A- +5V 1nF LED1 R40 10K φ3-红色- 散光- 低亮 REMOTE_RX R34 N3 2K REMOTE_TX FK R92 C27 100nF 1 2 B2B-XH- A-RCN14 2SD1781KT146R +5V R1 10K SWITCH R4 1K C5 100nF - B10B-PH-K -S- R3 2K R10 10K +5V TVS1 E11 100uF-25V R9 E 7B 6B 5B 4B 3B 2B 1B 8 7 6 5 4 3 2 1 1M IC8 C15 100nF 8 7 CSTL S8M00G53 6 5 4 3 2 1 COM 7C 6C 5C 4C 3C 2C 1C E 7B 6B 5B 4B 3B 2B 1B R57 +15V +15V R58 2.7K 10nF/630V C36 +310V 47uF-50V-105 - C17 10nF 4.7K ±1% Domestic air conditioner 43 R50 2K +12V 9 10 11 12 13 14 15 16 COM 7C 6C 5C 4C 3C 2C 1C C10 100nF IC12 UL N2003A+12V 9 10 11 12 13 14 15 16 UL N2003A- - L STEP_D BUZZ1 PK M13EPY- 4002 +12V R82 220Ω-0805 B10B-PH-K -S+12V CN5 12V CN5' 10 A 1 9 B 2 8 C 3 7 D 4 6 5 5 12V A 4 B 3 C 2 D 1 - +12V CN11 12V 5 4 A 3 B 2 C 1 D B5B-PH-K -S5 4 3 2 1 CN11' B5B-XH- A- CN9 7 6 5 4 3 2 1 B5P7-XH- A- L STEP_C HTV SB7.0CA-7V -600W- R96 R8 64 63 62 61 60 A/B 59 58 57 56 55 54 53 52 51 50 49 P26/TDIOC1 P25/TDIOB1 P24/TDIOA1 P23/TDIOD0 P22/TDIOC0 P21/TDIOB0 P20/TDIOA0/TDCL K P17/TAIO/INT1 P16/CL K 0 P15/RX D0/(TRIO)/(INT1) P14/TX D0 P86 P85/TFO12 P84/TFO11 P83/TFO10/TFI P82/TFO02 3 1 SSCK /SCL /P35 SSO/P37 V CC/AV CC V REF DA1/AN0/P07 V SS/AV SS DA0/AN1/P06 CL K 1/AN2/P05 P61 P62 AN3/P04 AN4/P03 AN5/P02 AN6/P01 AN7/P00 K I0/AN8/P10 USTEP_B 17 USTEP_C 18 USTEP_D 19 20 3-20-FL Z 21 22 23 3-23-L INE-RX 24 25 3-25-L INE-TX 26 27 28 29 3-29-TD 30 31 32 L STEP_A L STEP_B B5B-PH-K -S- Circuit diagrams 100-1206 100-1206 C004 1 2 3 4 S BR GND FB 10pF-1K V IC9 A6059H CY1 47uF-50V -105 - E204 1N4742A(12V-1W) E8 IC10 C010 :210±5mm; : R80 1.5K TL P421 1nF ; +12V 170328-1 ; 175022-1 2.2nF-250VAC CY4 4 3 1 E5 C41 100nF R51 1 2 3 4 IC5 C13 TPS5402 10nF 100K : 220± 5mm; 10uH-2.5A L2 D13 8 7 6 5 BOOT PH Vin GND EN COMP SS VSENSE +5V C40 220pF R76 22Ω E6 C42 C53 1uF 100nF R79 22K±1% C39 10pF R71 200K R81 20K±1% ; +5V R20 C9 1K R19 10K TL P421 L +12V L1 3 47K-3W ZD4 1N4746A(18V-1W) D171N4007(1000m A/1000V) N1 R22 220V_N 2K-1/4W 100uF-50V-105 CN23' CY3 1 2.2nF-250VAC D250 D12 CN23 R26 2K-2W COMM 1 1N4007(1000m A/1000V) 18AWG; 170±5mm; ; ; VF -1.25-3 100nF-50V K2 OJE-SS D4 RL S4148 H 220V_N 1 3 2 4 D14 RL S4148 -112L D 1 CON2 1 CON3 CON1 1 +12V 2 1nF 47K-3W R15 E4 4 IC6 4.7K 3-40-COMM_RX TL P851/PC851 C8 1 R91 N5 2SD1781KT146R 4 R12 4.7K 100K -1/4W 3-41-COMM_TX 1N4007(1000m A/1000V) D11 R14 IC4 2 R13 330 R90 K4 OJE-SS H -112L D L1 K3 OJE-SS H -112L D +12V 100nF 10K 3 4 3 0Ω RL S4148 R55 K1 OJE-SS H +12V B2B-XH- A- CN1 - -112L D COMM N1 4 +12V D18 RL S4148 44 220V_N D10 3 3-25-LINE-TX 2 1 2 3 4 5 6 7 8 C33 KRC119S 4.7K 1K 1K 1K 1K 1K 1 R44 R45 R46 R47 R63 +12V 2 CONTROL LER D26 C34 1nF 3-20-FLZ 3-4-HXF 3-29-TD 3-5-SW 3-1-N IC11 UL N2003A16 1B 1C 15 2B 2C 14 3B 3C 13 4B 4C 12 5B 5C 11 6B 6C 10 7B 7C 9 E COM 1 - L +12V +5V R112 2SD1781KT146R R117 10K 10K N4 R113 R116 R111 10K 1K 27Ω-0805 C25 R115 3-23-LINE-RX 10nF N6 10K 1 2 B4B-XH- A- D25 RL S4148 RL S4148 线控面板 +12V CN2 +12 4 GND 3 SIG 2 1 1 D5 RL S4148 R65 220K±1% 470uF-25V-105 C26 220pF 220-N TVR14621*620V CY5 CN27 1 220V_N 2.2nF-250VAC 18AWG; CN21' 1 D250 220-L CX2 100nF/275V 2 RV 1 470nF/275V CX 1 T3.15A 250V CN21 1 100nF LX1 LB2271(32mH-0.35A) L1 FUSE1 100nF LC1 BL M21PG600SN1D C32 ~220VAC ; 1000uF-25V-105 - C35 220V_L 250±5mm; +12V ZD202 CN17 1 D250 14AWG; R205 560 C7 100nF R209 100Ω-1206 CN52 1 L N001 K TC8050 12V-900mA 3000mA/200V CY6 4.7nF-250VAC 4.7nF-250VAC R61 1.5-1/4W 14AWG; R004 2.2K 47Ω-1/2W TRA- SRW19ES-X58V013/BCK-6-FE-1901H 10-120612V/1A-15V( ) D008 15V-100mA MBR1100(1A-100V ) 1N5399(1500m A/1000V) D21 1A/1000V 102/1000V C009 R019 E9 470uF-25V -105 D8 D20 22uF-50V -105 - D9 D19 1A/1000V 8 7 6 5 220-N C002 104-630VDC C23 R78 47K/2W FR106(1A-600V -500ns) E7 10nF/630V +310V D7 D6 D/ST D/ST NC V CC SCK 084R72 C014 4.7nF/250V 4.7nF/250V 4 T1 3 5 6 1 7 R77 +310V 100uF/450V 220-L C013 1N5399(1500mA/1000V ) NTC1 1N5399(1500mA/1000V ) 1N4742A(12V-1W) 1N5399(1500m A/1000V) +15V R011 10Ω-2512 R203 ZD001 R206 270-2W R202 ZD003 FR106(1A-600V-500ns) 1N4746A(18V -1W) D206 K5 OJE-SS N H -112L D 220V_N Domestic air conditioner REMOVAL PROCEDURE WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or Repair the product or products dealt with in this service information by anyone else could result in serious injury or death Version V1 Date 2020-11-14 Removal Procedure Removal of front panel front panel Remove the foam cushion 2 Loosen the screw 1 Domestic Air Conditioner Removal Procedure 3 Lift up the control box cover 4 Loosen the screw 5 Lift up the control box cover 2 Domestic Air Conditioner Removal Procedure Removal of front panel 6 Pull the wires out of the control box and then release the pivots on both sides of the unit to remove the front panel. Remove the air filters 1 3 Domestic Air Conditioner Removal Procedure Remove the casing 1 2 6 three 3 4 Domestic Air Conditioner Removal Procedure horizontal flap and the stepper motor flap Loosen the screws and remove the stepper motor 5 Domestic Air Conditioner Removal Procedure horizontal louver and control box Every blade go round and round,then move it 2. Loosen the screws 6 Domestic Air Conditioner Removal Procedure Loosen the hook and the service Cover 3 Lift up the exchanger and remove it 7 Domestic Air Conditioner Removal Procedure motor cover motor cover 8 Domestic Air Conditioner Removal Procedure 9 Domestic Air Conditioner Generalny Dystrybutor Systemów Klimatyzacji i Pomp Ciepła HEIKO REFSYSTEM Sp. z o. o. ul. Metalowców 5 86-300 Grudziądz +48 723 737 378 www.heiko.pl ">
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