Heiko BRISA JS070-C2 Owner's Manual
The Heiko BRISA JS070-C2 is a split-system air conditioner designed for domestic use. It provides cooling and heating functionality with a range of features to enhance comfort and energy efficiency. The unit features a digital control system with a remote control and allows for setting temperature, airflow speed, and operating mode (cooling, heating, dehumidifying and others). The JS070-C2 is designed for easy installation with features like a long distance air supplying capability and a self-cleaning function.
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SERVICE MANUAL ● Model No. JS070-C2 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 ● All rights reserved. Unauthorized copying and distribution is a violation of law ● Version :V1 Date:2020-11-19 Table fo contents Contents 1.Introduction .......................................................................................... 1 ● 2.Features ............................................................................................... 7 3.Specifications ....................................................................................... 8 4.Sensors list........................................................................................... 9 ● 5.Pinping diagrams................................................................................ 10 6.Printed circuit board connector wiring diagram ................................... 11 7.Funcitions and control ........................................................................ 13 8.Dimensional drawings ........................................................................ 25 9.Center of gravity ................................................................................. 25 10. Service Diagnosis ............................................................................ 26 11. Wiring diagrams ............................................................................... 43 ● 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. 1 Domestic air conditioner Introduction 1.2.1 Embedded wire checking before installation Check the embedded wire diameter suitable to request: 2 2 2 (Power supply from indoor: 2.5kw ≥1.0mm 3.5kw,5kw ≥1.5mm 7kw ≥1.0mm ; Power supply from outdoor 2 ≥1.0mm ) Check the embedded wire are four roots, L/N/COM/GND; GND is needed, if not, thunder or high voltage wave from power grid will impact to the performance Using a multi-meter to test short circuit of the four roots wires, make sure no short circuit happen. 1.2.2 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. ● 2 Domestic air conditioner Introduction 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. 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. 1.2.3 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 3 Domestic air conditioner Introduction 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 For Be sure to install the product securely in the installation frame mounted on a window frame. integral If the unit is not securely mounted, it can fall and cause injury. units only 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. 4 Domestic air conditioner Introduction 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. 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. 1.2.4 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. 1.2.5 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: 1.2.6 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 Warning Caution incorrect manipulation, may damage equipment, loose data, get an unexpected result or has to restart (part of) a procedure. 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 Easy Support Clip: It is more convenient for installation by extending space with additional support clip, meanwhile, saving time. Self Clean: With a new-generation hydrophilic foil, when the air conditioner in cooling or drying mode, the dust on evaporator will be taken away by condensed water flowing rapidly. A-PAM DC inverter: A-PAM inverter technology is the upgrade of 180°sine wave inverter, it adopts additional momental control to decrease the vibration in the low compressor frequency and also contribute to great ● energy Long distance air supplying: The indoor units is improved by the optimized motor, fan and air duct so as to provide long distance airflow with 15m+ maximum. ● -15°C heating: when -15°C 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. DIY auto mode:You can set a temperature value, with which the unit can adjust the operation mode automatically. Auto restart: The function permits automatic return to previous operation conditions after a sudden power ● break. 24 hours timer:Use the timer function to set on, or off, or from on to off, or from off to on etc, within 24 hours. ● 2-way piping design: The indoor unit offers the possibility of left or right piping direction. Easy clean design: The panel is easy to wash and the airflow vents can be detached easily Double 8 display. T he display is Double 8 mode Wi-Fi control:Control your air conditioning system with smart phone or tablet which can connect internet. 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 heating 7.0 8.1 Btu/h 23880 27640 Power Consumption(Rated) KW 2.16 2.18 SEER/SCOP W/W 7.1/A++ 4.0/A+ Annual energy consumption KWh 350 1963 Moisture Removal m³/h 2.8*10﹣³ KW Capacity rated ● TECHNICAL SPECIFICATIONS Dimensions H*W*D mm 1125×240×335 Packaged Dimensions H*W*D mm 1206×342×418 Weight / KG 14 Gross weight / KG 17.5 Color / / White Sound pressure(high/medium/low) dB 47/43/37 Sound power dB 60 ● ● Sound level 8 Domestic air conditioner Specifications TECHNICAL SPECIFICATIONS-PARTS cooling Type Fan Heat exchanger heating Cross flow fan Motor output W 40 40 Air flow rate(high) m³/h 1200 1200 Speed(super/high/low) rpm 1250/1100/800 1150/1000/700 Type ML fin-φ 7HI-HX tube Segment *stage*fitch 3*18*1.4 Air direction control Right,Left,Horizontal,Downward Air filter Removable/Washable/Mildew Proof Temperature control Microcomputer 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 Conversation formulae Piping length Kcal/h= KW×860 Btu/h= KW×3414 5m cfm=m³/min×35.3 4.Sensors list type Description Qty Room sensor Its used for detecting room temperature Pipe sensor Its used for detecting temperature of evaporator ● 9 1 Domestic air conditioner Piping diagrams 5 Piping diagrams Electric Expansion Valve Electric Expansion Valve Domestic air conditioner Printed circuit board connector wiring diagram 6.Printed circuit board connector wiring diagram Connectors PCB(1) (Control PCB) 1) CN9 Connector for fan motor 2) CN6 Connector for heat exchanger thermistor and Room temperature thermistor 3) CN5、CN5’ Connector for UP&DOWN STEP motor 4) CN11、CN11’ Connector for RIGHT&LEFT STEP motor 5) CN21’、CN17 Connector for indoor terminal N and L 6) CN7 Connector for display board ● 7) CN43、CN44 Connector for ion generator 8) CN23’ 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) CN47 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 JS070-C2 J1 J2 DISPLEY SERIES UNIT MODEL JS070-C2 ON B RC ON OFF 33 OFF ON 26 OFF OFF 23 PCB MODEL 0011800646D(26) ● OFF OFF 325/498 OFF ON 324 ON OFF 387 ON ON 317 DISPLAY MODEL 0011800387D 11 Domestic air conditioner Printed circuit board connector wiring diagram PCB CN51 CN34 CN5 CN5 ’ CN11 CN7 CN14 CN2 ● CN6 CN23 ’ CN44 CN21 ’ CN47 CN27 CN43 CN17 CN9 ● 12 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 Tr≥Ts-3℃ Choose Cooling Mode Tr<Ts-3℃ 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: 16℃---30℃ Temperature difference: 1℃ * 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 1℃) Automatic: When Tr≤Ts+3℃, high speed. When Ts+1℃≤Tr<Ts+3℃, medium speed When Tr<Ts+1℃, 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 9℃, the compressor will be restarted again (the requirement of 3 minutes’ delay should be satisfied.) * timing system on/off function. ● * Dormant control function. 13 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. ● When Tr is between the Ts and Ts+2℃, the outdoor system will operate at the high dehumidifying 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. All the frequency converses have a ±1℃ difference. 区 段 Ts+20AD 值(约 2℃) 1 (COOL) Ts 区段 2(DRY) Ts+3AD 值(约 0.5℃) Ts-12AD 值(约 1.5℃) 区段 3(停机) * 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.) 14 Domestic air conditioner Functions and control * Coil protection (synchronic overheating protection) are installed for the four directions latch 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. If Tr+0.5℃Ts, the outdoor compressor is turned on, the indoor fan will be at the cold air proof mode. 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: ● 设定 37(THHOT4) 37(THHOT3) 中风 35(THHOT2) 低风 35 25 25(THHOT1) 微弱风 16(THHOT0) 停止 * 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. 15 Domestic air conditioner Functions and control * Automatic heating temperature compensation: when the system enters the heating mode, the temperature compensation (4℃) 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. 16 Domestic air conditioner Functions and control 3 .system /on and off timing: The settings will be completed according to the orders.. 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. 17 Domestic air conditioner Functions and control The test operation can be stopped by the relative commands from the remote 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 1℃ 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 63℃ for 2 minutes. The indoor fan will be controlled by the thermostat. The outdoor system can be restarted when the coil temperature is below 45℃ 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: 18 Domestic air conditioner Functions and control 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. 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. 19 Domestic air conditioner Functions and control The CPU of the main control will be 60 times faster. 7.2 Value of thermistor Room sensor and Pipe Sensor Room sensor R25℃=23KΩ±2% B25℃/50℃=4200K±1% R25℃=23KΩ+2% Temp.(℃) Resistor(KΩ) Temp.(℃) Resistor(KΩ) Temp.(℃) Resistor(KΩ) -20 266.905 18 32.215 56 6.1 -19 250.866 19 30.671 57 5.87 -18 235.895 20 29.21 58 5.65 -17 221.911 21 27.828 59 5.44 -16 208.838 22 26.521 60 5.24 -15 196.609 23 25.283 61 5.04 -14 185.163 24 24.111 62 4.86 -13 174.443 25 23 63 4.68 -12 164.399 26 21.94 64 4.51 -11 154.983 27 20.94 65 4.35 -10 146.153 28 19.99 66 4.19 -9 137.87 29 19.09 67 4.04 -8 130.096 30 18.23 68 3.9 -7 122.799 31 17.42 69 3.76 -6 115.946 32 16.65 70 3.63 -5 109.51 33 15.97 71 3.5 -4 103.462 34 15.22 72 3.38 -3 97.779 35 14.56 73 3.26 -2 92.437 36 13.93 74 3.15 -1 87.415 37 13.34 75 3.04 0 82.691 38 12.77 76 2.94 1 78.248 39 12.23 77 2.84 2 74.067 40 11.71 78 2.74 3 ● 70.133 41 11.22 79 2.65 4 66.43 42 10.76 80 2.56 5 62.943 43 10.31 6 59.659 44 9.89 7 56.566 45 9.49 8 53.651 46 8.1 9 50.904 47 8.74 ● ● ● 20 Domestic air conditioner Functions and control 10 48.314 48 8.39 11 45.872 49 8.05 12 43.569 50 7.73 13 41.395 51 7.43 14 39.343 52 7.14 15 37.406 53 6.86 16 35.577 54 6.6 17 33.848 55 6.34 R25℃=10KΩ±2% B25℃/50℃=3700K±2% Temp.((℃)) Max.(KΩ) Normal(KΩ) Min.(KΩ) -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 ● ● ● ● ● 21 Tolerance(℃) Domestic air conditioner Functions and control 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 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 ● ● ● ● 22 Domestic air conditioner Functions and control 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 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 ● ● ● ● 23 Domestic air conditioner Functions and control 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 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 ● ● ● 24 Domestic air conditioner Service diagnosis 8.Dimensional unit:mm 240 335 302.8 1125 513 834 9.Center of gravity unit:mm 240 142 150 335 418 113 1125 25 Domestic air conditioner 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. 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 Details of Measure ● Check the power supply. Check the indoor PCB 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 to make sure that the required spaces for installation Check installation (specified in the Technical Guide, etc.) are provided. 26 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 ★ ■ ■ 27 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 failur/ 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.37 Page.28 Page.28 Page.29 Page.30 / Page.40 Page.29 Page.32 / Page.34 / Page.35 / Page.36 / / / / / / / Page.39 Page.39 / Page.33 / / / / / / Domestic air conditioner Service diagnosis 10.3.1 Thermistor or Related Abnormality ★ ■ ■/ E1: Room temperature sensor failure ★ □ □/E2: 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. ● Note: The values vary slightly in some models Supposed Causes ■ Faulty connector connection ■ Faulty thermistor ■ 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 Is normal? Replace the thermistor it 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. ● 10.3.2 EEPROM abnormal ● 28 Domestic air conditioner Service diagnosis Indoor Display Indoor display ★ □ ★/E4: Indoor EEPROM error ■ ★ ■/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 ■ Faulty EEPROM data ■ Faulty EEPROM ■ 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. 29 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. ● 10.3.4 Outdoor DC fan motor fault ● Outdoor display ■ ★ □/F8 LED1 flash 9 times Method of DC fan motor is detected by checking the fan running condition and so on Malfunction Malfunction Decision Conditions ● Supposed Detection when the detected rotation feedback signal don’t received in 75 seconds ■ DC fan motor protection dues to the DC fan motor faulty 30 Domestic air conditioner Service diagnosis ■ DC fan motor protection dues to faulty PCB Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, 31 or parts damage may be occurred. Domestic air conditioner Service diagnosis 10.3.5 IPM protection Outdoor display: Method of Malfunction Detection □ ★ ★ /F1 LED1 flash 2 times IPM protection is detected by checking the compressor running condition and so on Malfunction Decision Conditions ■ The system leads to IPM protection due to over current ■ The compressor faulty leads to IPM protection ■ circuit component of IPM is broken and led to IPM protection Supposed Causes ■ IPM protection dues to the compressor faulty ■ IPM protection dues to faulty PCB of IPM module ■ Compressor wiring disconnected Troubleshooting ● * Caution Be sure to turn off power switch before connect or disconnect connector, else parts damage may be occurred. or YES YES ● NO NO 32 Domestic air conditioner Service diagnosis 10.3.6 Over-current of the compressor Outdoor Display: ■ ★ □/F2 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 ■ Faulty IPM Module ■ Faulty compressor ■ Faulty power supply Troubleshooting * 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. ● ● 33 Domestic air conditioner Service diagnosis 10.3.7 The communication fault between IPM and outdoor PCB Outdoor display: ■ ★ ■/F3 LED1 flash 4 times Method of Malfunction Detection Communication is detected by checking the IPM module and the outdoor PCB Malfunction Decision Conditions ■ The outdoor PCB broken leads to communication fault ■ The IPM module broken leads to communication fault Supposed Causes ■ The outdoor PCB is broken ■ The IPM module is broken ■ Communication wiring disconnected 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 ● 34 Domestic air conditioner Service diagnosis 10.3.8 Power Supply Over or under voltage fault Outdoor display: ■ ★ □ /F19 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 Supposed Causes ■ Supply voltage not as specified ■ the IPM module is broken ■ the outdoor PCB is broken 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 Maybe there is some disturbance Is it ok? 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. 35 Domestic air conditioner Service diagnosis 10.3.9 Overheat Protection For Discharge Temperature Outdoor display: ■ ★ ■/F4 ● Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting LED1 flash 8 times The Discharge temperature control is checked with the temperature being detected by the Discharge pipe thermistor ● when the compressor discharge temperature is above 110℃ ■ Electronic expansion valve defective ■ Faulty thermistor ■ 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 ● 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 The temperature exceeds 110 ℃ shortly after the machine starts up? ● NO Malfunctions occur after running for some time even though the measured temperature is below 110℃. 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 36 Domestic air conditioner Service diagnosis 10.3.10 The communication fault between indoor and outdoor Indoor display outdoor display Method of Malfunction Detection ■ ■ ★ /E7 LED1 flash 15 times ● Communication is detected by checking the indoor PCB and the outdoor PCB. ● Malfunction Decision Conditions ■ The outdoor PCB broken leads to communication fault. ■ The indoor PCB broken leads to communication fault. 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) 37 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 damaged,replace 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 0mΩ with a multimeter after switch off the power . 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. 38 Domestic air conditioner Service diagnosis 10.3.11 Loss of synchronism detection Inverter side current detection is abnormal Outdoor Display ■★■/F11 LED1 flash 18 times ■★■/F28 LED1 flash 19 times ● Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting The position of the compressor rotor can not detected normally ● when the wiring of compressor is wrong or the connection is poor; or the compressor is damaged ■ Faulty The wiring of compressor ■ Faulty compressor ■ 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 ● 39 Malfunctions exist also, the compressor is damaged replace a new one Domestic air conditioner Service diagnosis 10.3.12 High work-intense protection Outdoor display ★★★/E9 LED1 flash 21 times 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 65℃ twices in 30 minutes. ■ Faulty electronic expansion valve ■ Dirty heat exchanger ■ Faulty heat-exchange sensor ■ Insufficient gas Supposed Causes ● Troubleshooting * 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 65℃ ● YES The malfunction is reported after the machine has run for some time? ● 1 、 Check room temperature and pipe temperature sensor. 2、the temperature monitoring circuit of the indoor mainboard NO YES The indoor unit blows poorly due to blocked filters or poor condition of the fan? 1) Clean the filters 2) Reinstall the fan. ● ● NO Use some tools to measure the pressure of system, 40 Domestic air conditioner Printed circuit board connector wiring diagram 11. Wiring diagrams 11.1 INDOOR UNIT INDOOR UNIT DIAGRAM M C0N3 C0N2 Y/G DC FAN MOTOR 0010561514 W ION GENERATOR R C0N1 FUSE1 T3.15A/250VAC CN9 CN21 N CN52 (L) FRESH AIR CN2 WIRED CONTROLLER CN5' CN5 UP-DOWN STEPMOTOR CN11 CN11' CN23 S ON 1234 SW2 BL CN51 CN34 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 optiona l. 2.The two pins of CN51 should be shorted, when the second channel(RC) of S W2 is selected. 41 R:Red B:Black W:White BL:Blue Y:Yellow BR:Brown Y/G:Yellow/Green Domestic air conditioner Circuit diagrams 11.2 Circuit Diagrams 100-1206 100-1206 FR106(1A- 600V-500ns) 1N5399(1500m A/1000V) D19 1A/1000V D20 D21 1A/1000V C004 1 2 3 4 S BR GND FB 10pF-1K V IC9 A6059H 22uF-50V -105℃- D8 D9 8 7 6 5 220-N C002 104-630VDC 47uF-50V -105℃- E9 4.7nF-250VAC 4.7nF-250VAC N001 KTC8050 R205 560 +12V R209 100Ω-1206 Z D202 E204 1N4742A(12V- 1W) E8 1000uF-25V-105℃- IC10 R80 1.5K C010 R61 1.5-1/4W TL P421 1nF CN52 1 C35 +12V 100nF LC1 BLM21PG600SN1D E5 470uF-25V -105℃ CN17 1 D250 C32 175022-1 CN21' 1 D250 4 3 220-L CX2 100nF/275V 2 RV 1 CX 1 ~220VAC 470nF/275V T3.15A 250V CN21 1 100nF LX1 LB2271(32m H-0.35A) 220V_L 1 FUSE1 L1 L C7 100nF 12V-900mA 3000m A/200V CY6 CY1 R004 2.2K C41 100nF R51 100K IC5 1 2 3 4 BOOT PH Vin GND EN COMP SS VSENSE C13 TPS5402 10nF 8 7 6 5 10uH-2.5A L2 M B R 1100(1A -100V ) E7 C23 R78 47K/2W C014 FR 106(1A -600V -500ns) D7 10nF/630V +310V D6 D /ST D /ST NC V CC SCK084R72 100uF/450V 220-L +310V 1N 5399(1500m A /1000V ) 1N 5399(1500m A /1000V ) NTC1 C013 4.7nF/250V4.7nF/250V 4 T1 3 5 102/1000V 6 C009 R019 1 7 47Ω-1/2W R77 TRA- SRW19ES- X58V013/BCK- 6-FE-1901H 10-1206 12V/1A-15V( ) D008 15V-100mA R202 1N4742A(12V- 1W) 1N5399(1500m A/1000V) +15V R011 10Ω-2512 R203 Z D001 R206 270-2W Z D003 1N 4746A (18V -1W ) D206 D13 C40 220pF R76 22Ω +5V E6 C42 C53 1uF 100nF R65 470uF-25V-105℃ R79 C26 220pF C39 10pF R81 R71 200K 220-N TVR14621* 620V CY4 CY5 CN27 2.2nF/250V 1 220V_N 2.2nF/250V18AWG; mm; +5V TL P851/PC851 R20 C9 1K TL P421 R19 10K 1nF L +12V 自由组合一拖一室内外通讯 红 1 47K-3W Z D4 1N4746A(18V- 1W) D17 1N4007(1000m A/1000V) N1 R22 220V_N 2K-1/4W 100uF-50V-105℃-高频 CN23' CY3 1 2.2nF-250VAC D250 D12 CN23 R26 2K-2W COMM 1 1N4007(1000m A/1000V) mm; 颜色:红;单芯;端子:VF- 1.25-3 18AWG; 线长: 100nF-50V IC6 4.7K 3-40-COMM_RX 47K-3W R15 E4 L1 3 C8 100K -1/4W R91 N5 2SD1781KT146R K2 O JE-SS (H )-112L (D ) D4 RL S4148 负离子 CON2 1 4 R12 4.7K 1 CON1 换新风 220V_N 1 负离子 CON3 4 2 +12V L1 K3 O JE-SS (H )-112L (D ) 3 RL S4148 1 D5 低功耗 L R111 10K 27Ω-0805 C25 N6 R115 10K 3-23-LINE- RX 3-20-FL Z 3-29-TD R45 1K R44 1K R46 1K R63 1K 10nF C33 KRC119S 4.7K 1 2 3 4 5 6 7 8 3-25-LINE- TX 100nF D10 RL S4148 外机启动电源 K1 O JE-SS (H )-112L (D ) COMM +12V +12V D18 RL S4148 N1 通讯N 线 10K 42 220V_N 4 3-1-N 3-5-SW 3 10K R116 1K 2 R117 +12V 4 LER 2SD1781KT146R N4 IC11 U LN2003A- 贴片 16 1B 1C 15 2B 2C 14 3B 3C 13 4B 4C 12 5B 5C 11 6B 6C 10 7B 7C 9 E COM 3 CONTROL D26 C34 1nF 10K R113 +5V 1 B 4B -XH- A- 红色-立式 D25 RL S4148 +12V R112 2 +12 GND SIG R LS4148 CN2 4 3 2 1 1 +12V 线控面板 3-41-COMM_TX 1N4007(1000m A/1000V) D11 R14 IC4 2 R13 330 R90 K5 O JE-SS (H )-112L ( D) 220V_N Domestic air conditioner R10 10K R3 2K 2K P1 2SA1037AK R11 R23 10K +5V T JC8-04(立式) 1 2 3 4 C1 100nF RST 100欧 100欧 VCC WP SCL SDA +5V C18 100nF EEPROM M24C04 A0 A1 A2 GND C11 IC1 JP3 1 2 3 4 TJC8-4A 8 7 6 5 R30 +5V 10K 100nF 3-20-FL Z 3-5-SW 3-1-N R74 560ΩSCL SDA R33 +5V 560Ω R29 10K +5V 4 3 2 1 47uF-50V-105℃- CN9 风机输出 2.7K 4.7uF-50V-105℃ 7 +15V E14 6 风机反馈 10nF/630V 5 R59 10K C36 4 10K 3 R57 10KR68 2 1 +310V E15 C17 R64 10nF 10K B 5P7-XH- A1nF TL P421 IC7 5 6 7 8 R 37 10K 10K 10K 10K R 96 R8 R104 2K R69 R7 C28 C20 2K 2K 100nF 100nF +5V R103 20K R102 P120/AN19 P43 P42/TI04/TO04 P41/TI07/TO07 P40/TOOL 0 RESRT P124/XT2 P123/XT1 P137/INT0 P122/X2 P121/X1 REGC VSS EVSS0 VDD EVDD0 NDI -04H SW2 1 2 3 BUZ Z 1 f_pw m 4 PKM13EPY- 4002 +12V tool 5 R82 220Ω-0805 6 RST fch1 7 R50 E11 dch2 8 XT1 2K +12V 100uF-25V dch1 9 2 10 B 10B -PH-K-S-原色-立式 IC8 C15 100nF 11 9 8 +12V CN5 COM E C43 1uF 12 C STL S8M00G53 (三脚) 8M12V 10 7 BUZ Z CN5' 10 7C 7B 13 11 6 DSTEP_A A 14 1 9 6C 6B DSTEP_B E2 C37 C6 12 5 B 15 2 8 5C 5B TVS1 13 4 DSTEP_C C 16 3 7 4C 4B DSTEP_D 14 3 +5V D 4 6 3C 3B 100uF-16V 1nF 100nF 15 2 USTEP_A 5 5 12V 2C 2B PT V S5V0S1UR- 5V-400W16 1 A 4 1C 1B B 3 U LN2003A- 贴片 C 2 D 1 +12V C10 100nF IC12 9 8 COM E 10 7 USTEP_B 7C 7B 11 6 USTEP_C +12V 6C 6B 12V USTEP_D 12 5 5 5C 5B 13 4 LSTEP_A A 4 4C 4B LSTEP_B 14 3 B 3 3C 3B LSTEP_C 15 2 2 C 2C 2B LSTEP_D 16 1 D 1 1C 1B R36 10K IC3 TL P421 U LN2003A+15V R39 1K R58 C14 1-2299683(原色-立式) AN18/P147 P146 scl00/TI 07/TO07/P10 sda00/TI06/TO06/RXD0/P11 TI05/TO05/INT5/TXD0/P12 sdaa0/TI 04/TO04/TXD2/P13 scla0/sda20/TI 03/TO03/RXD2/P14 scl20/TI 02/TO02/P15 (RXD0)/INT5/TO01/TI 01/P16 (TXD0)/TO02/TI02/P17 PCL BUZ 1/P55 P54 (INT11)/P53 (INT10)/P52 INT2/P51 INT1/P50/sda11 5267-04A- 390Ω R60 +5V +5V f_fb - f_pw m LED R40 +5V 1 GND 2 TX 3 RX 4 CN34 +5V 10nF C24 R108 1K R97 100ΩNtxd R98 100ΩNrxd R88 10K 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 R1 10K R4 1K C5 100nF SWI TCH +5V R101 10K 10K R95 C12 100nF SW1 TSVC- 1 R106 R43 10K N2 27Ω-0805 10K +5V 10K 4.7K KRC119S R38 10K R73 REMOTE_TX CN51 2K 1 2K 2 R100 B 2B -XH- A- B 2B -XH-A-R-红色-立式 CN14 1 2 1K N1 2SD1781KT146R 10nF R99 +5V R34 100Ω 100Ω 100Ω 1K R18 R17 R21 R31 C21 R54 10K 2 J3 +5V 1 1K R56 IR RCK SER SRCK GG GND 5V DIGH DIGL MODE fch1 D16 RL S4148 +12V CN36 3 2 1 B 3B -XH- A- 10K RL S4148 D15 R35 CN7 1 COM3 2 COM2 E1 3 +5V 4 GND 100uF-16V 5 SER 6 RCK 7 SRCK 8 IR R62 10K +5V B 8B -PH-K-S注3:R53,R6,R16,R18,R17,R21 4.7uF-1206 SER RCK SRCK IR 1nF CN6 1 2 3 4 +5V +5V 4.7uF-12064-1971798-1-原色-立式 +5V 2 1 100Ω 100Ω C31 C30 J2 +5V 10K 10K 2 R109 R6 R16 R28 1K R49 R42 J1 1 1K DIG_MODE DIGL DIGH 2SD1781KT146R N3 2K R27 1K 1K dch2 dch1R86 REMOTE_RX C19 10nF R92 C27 100nF FK LSTEP_D SWI TCH FK Ntxd Nrxd C3 C29 R24 R25 10nF ROOM 3-23-L INE- RX 3-25-L INE- TX PIPE REMOTE_RX REMOTE_TX IC2 R5F100L E φ3- 10K LED1 +5V R2 10K +5V JP1 R5 1K sh 2 C16 1 100nF BM(ad) T JC8-02(立式) 25/35 自检/缩时 A/B C2 100nF 4.7K 1% R94 1K RST tool 3 1 4.7K 1% f_fb 64 63 62 3-29-T D 61 LE D 60 3-41-C O M M _T X 59 3-40-C O M M _R X 58 sh 57N etL abel277 56 R O O M 55 B M (ad) 54 25/35 53 A /B 52N etLabel275 51N etLabel274 50N etLabel278 49 N etLabel276 beep0/IN T 6/P140 beep1/IN T 7/P141 T I00/P00 T O 00/P01 T X D 1/A N 17/P02 sda10/R X D 1/A N 16/P03 SC L10/SC K 10/P04 P130(out) A V R E FP/A N 0/P20 A V R E FM /A N 1/P21 A N 2/P22 A N 3/P23 A N 4/P24 A N 5/P25 A N 6/P26 A N 7/P27 P60/SC LA 0 P61/SD A A 0 P62(开漏) P63 P31/IN T 4/T I03/T O 03/beep0 P77/IN T 11/T X D 2 P76/IN T 10/R X D 2 P75/IN T 9/scl01 P74/IN T 8/sda01 P73/K R 3 P72/K R 2 P71/sda21 P70/K R 0/scl21 P06/T I06 P05/T I05 P30/IN T 3/scl11 SC L 17 SD A 18 w p 19 N etLabel27320 21 B U ZZ D ST E P_A 22 D ST E P_B 23 D ST E P_C 24 D ST E P_D 25 U ST E P_A 26 U ST E P_B 27 U ST E P_C 28 U ST E P_D 29 LST E P_A 30 LST E P_B 31 LST E P_C 32 R O O M PIPE +5V JP4 4 3 R83 2 R93 1 Circuit diagrams 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 2020-11-19 Removal Procedure Removal of front panel Indoor unit Step Procedure Points 1.Features 2.Remove the front panel 1 Hold the front panel by the tabs on the both sides and lift it 1 Domestic air conditioner Removal Procedure Step 2 3 Procedure Loosen the screw and lift up the casing cover Points Loosen the screw Loosen the screw and lift up the control box cover Loosen the screw 2 Domestic air conditioner Removal Procedure Remove the air filters and horizontal flap Step 6 Procedure Points Pull the Harness 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 Lift an air filter upwards slightly and then pull it out downwards Remove the horizontal flap ■ The horizontal flap is Single 1 Release the side of pivot and then Release the Center of the pivot. Bend the horizontal blade slightly and remove it. 3 Domestic air conditioner Removal Procedure Remove the casing Step Procedure 1 Release the screw covers(3EA) 2 Loosen the marked Screw (7EA) 4 Points Domestic air conditioner Removal Procedure Step Procedure Points Holes(4EA) 3 ■When assembling, install the front grille horizontally so as not to stuff the flap inside. ■When assembling, make sure the four hooks are caught properly. Release the marked hooks (4EA) and then Pull the front grille out Horizontally and remove it HOOK(4EA) 5 Domestic air conditioner Removal Procedure Release stepping motor and control box Step Procedure Points Hooks (3EA) 1 2 Release the top cover of the control box hooks and then remove it. Pull the Harness out of the PCB unit and then Loosen the control Box screws (2EA) . Pull the control box from of the frame and remove it. Loosen screws (2EA) Harness: Stepping motor and fan motor harness 6 Domestic air conditioner Removal Procedure Release stepping motor and control box Step 3 Procedure Points Loosen the stepping motor screws (2EA), and then Release the stepping motor 7 Domestic air conditioner Removal Procedure Removal of Heat Exchanger Step 1 Procedure Points Loosen the marked screws(2EA) Loosen the Screws (2EA) 2 Pull mounting plate and heat exchanger bracket out from Hook of the base frame and then release them. 8 Domestic air conditioner Removal Procedure Step 3 Procedure Points Release the fixture plate from the base frame hook and remove it. 9 Domestic air conditioner Removal Procedure Step 4 Procedure Points Loosen the marked screws (7EA). And then Remove the heat exchanger Remove Fan Motor 1 Loosen the marked screws(4EA) and release the cover of fan motor 10 Domestic air conditioner Removal Procedure Step 1 Procedure Points Loosen the marked screw (2EA) of fan motor up bracket and remove it Screw of fan rotor Screw of Fan Motor up bracket 2 Loosen the marked screw (1EA) of fan motor and remove fan motor ove it Fan motor bracket(UP) Fan motor assy 11 Domestic air conditioner Removal Procedure Step 3 Procedure Points Lift up the right part of the fan and remove it Remove horizontal louver and fan motor bracket 1 Every blade go round and round, then move it 12 Domestic air conditioner Removal Procedure Remove fan motor bracket and fan bearing Step Procedure 1 Pull the hook of fan motor bracket and upward remove it 2 Pull the hook of bearing bracket and upward remove it 13 Points Domestic air conditioner Removal Procedure Remove frame work board Step 1 Procedure Points Loosen the marked screw of frame work board Screw of frame work board 2 Pull the hook of frame work board, remove it 14 Domestic air conditioner Removal Procedure Remove drain pipe and drain pipe stem Step Procedure 1 Loosen the marked screw of drain pipe and then remove it 2 Pull the drain pipe stem from base frame and the remove it 15 Points 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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Key features
- Cooling and heating
- Digital control
- Remote control
- Self-cleaning
- Long distance airflow
- Energy efficiency
- Easy installation
- Sleep mode
- Timer
- -15°C heating capability
Frequently asked questions
The temperature control range for cooling mode is 16℃---30℃.
The dehumidifying mode controls the humidity level by adjusting the compressor operation frequency and fan speed. The system will operate at a higher dehumidifying frequency for 10 minutes and then at a lower frequency for six minutes, while the indoor fan operates at low speed.
The dormant control function allows for energy saving during periods of inactivity. It automatically raises the temperature in cooling mode or lowers the temperature in heating mode after a set time, then shuts down the system after 8 hours.
To start a test operation, turn the unit off and press the urgency key for 10 to 15 seconds. The display screen will show the resume of the last malfunction. The test operation will be finished in 30 minutes and can be stopped by using the remote control commands.