SERVICE MANUAL Wall Mounted Type DC Inverter Model No.U25BEFFRA 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 206 (Qingdao Haier Air Conditioner General corp., Ltd) All rights reserved. Unauthorized copying and distribution is a violation of law Haier Group Version V Date 206-0-3
Contents Contents. Introduction... 2. Specifications...7 3. Sensors list...8 4. Piping diagrams...9 5. Operation range...0 6. Printed circuit board connector wiring diagram... 7. Functions and control... 5 8. Dimensional drawings... 29 9. Center of gravity... 29 0. Service diagnosis... 30. Performance and curves diagrams... 48 2. Circuit diagrams... 56 Domestic air conditioner
. Introduction Introduction. Model name explanation U 2 5 B E F F R A Apply tot; 220~240V50HZ/ph DC inverter Heat pump & R32 refrigerant Version number Europe Platform of outdoor units: 35 (35 platform) Nominal cooling capacity (9000BTU/h) Type of outdoor unit : U (normal type) The maximum combination number Domestic air conditioner
Introduction.2 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..2. 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 cooling 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. Domestic 2 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 cooling cycle section has cooled down sufficiently before conducting repair work. Working on the unit when the cooling 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..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. Incorrect use of the installation frame and improper installation can cause the equipment to fall, resulting in injury. 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. For integral units only For integral units only Domestic 3 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-40A / R22) in the refrigerant system. If air enters the cooling 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. 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. Domestic 4 air conditioner
Introduction.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. 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 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..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: Domestic 5 air conditioner
Introduction.2.5 Using Icons List Icon Type of Information Description Note Caution Warning Note Caution Warning Reference 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 incorrect manipulation, may damage equipment, loose data, get an unexpected result or has to restart (part of) a procedure. A warning is used when there is danger of personal injury. A reference guides the reader to other places in this binder or in this manual, where he/she will find additional information on a specific topic. Domestic 6 air conditioner
Specification 2.Specifications NOMINAL DISTRIBUTION SYSTEM VOLTAGE Phase / Frequency Hz Voltage V 50 230 NOMINAL CAPACITY and NOMINAL INPUT cooling heating Capacity rated KW 2.6 0.8-3.4 3.4.0-4.6 Btu/h 8870(2730-600 600 340-5690 Power Consumption(Rated) KW 0.8 0.9 SEER/SCOP W/W 6.2 4.0 Annual energy consumption KWh 47 839 Moisture Removal m³/h.2*0 ³ TECHNICAL SPECIFICATIONS-UNIT Dimensions H*W*D mm 780 245 540 Packaged Dimensions H*W*D mm 920 35 620 Weight / KG 27 Gross weight / KG 30 Sound level Sound peessure db(a) 46 Sound power db(a) 60 46 60 ELECTRICAL SPECIFICATIONS cooling heating Nominal running current A 3.6 3.5 Maximum running current A 6.2 6.7 Starting current A.0.0 TECHNICAL SPECIFICATIONS-PARTS Type Model Compressor Motor output Oil type Oil charge volume Type Motor output Fan Air flow rate(high) Speed(high/low) Heat Type exchanger Row*stage*fitch W L W m³/h rpm cooling heating Rotary Compressor 9RS092ZAA2 700 Fw50s or equivalent 0.32 Axial fan 40 900. 800/300 ML fin- 7.HI-HX tube *2*.35 7 Domestic air conditioner
TECHNICAL SPECIFICATIONS-OTHERS Refrigerant circuit Piping connections (external diameter) Heat insulation type Refrigerant type R32 Refrigerant charge KG 0.7 Maximum allowable distance between indoor an outdoor m 5 Maximum allowable level difference m 0 Refrigerant control Capillary liquid mm 6.35 gas mm 9.52 drain mm 6 Both liquid and Gas pipes Max. piping Length m 5 Max. vertical Difference m 0 Chargeless m 7 Amount of Additional Charge of Refrigerant g/m 20 Intemational Protection degree IP 24 Specification Note: the data are based on the conditions shown in the table below cooling heating Piping length Indoor: 27 DB/9 WB Indoor:20 DB 5m Outdoor: 35 DB/24 WB Outdoor: 7 DB/6 WB Conversation formulae Kcal/h= KW 860 Btu/h= KW 344 cfm=m³/min 35.3 3 Sensors list type Description Qty Ambient sensor Its used for detecting temperature of outdoor side Defrosting sensor Its used for controlling outdoor defrosting at heating mode Descharging sensor Its used for compressor in case of over-heat 8 Domestic air conditioner
4 Piping diagrams Pinping diagrams 9 Domestic air conditioner
5 Operation range Operation range 60 40 20 0-5 2 35 0 Domestic air conditioner
Printed circuit board connector wiring diagram 6. Printed circuit board connector wiring diagram Connectors PCB () (Control PCB) For U09/2BEFFRA ) CN, CN2 Connector for power N and L 2) CN3 Connector for ground 3) CN23 Connector for DC POWER 5V and 5V to the module board 4) CN9, CN0 Connector for CN9,CN8 on the module board 5) CN22 Connector for fan motor 6) CN Connector for four way valve coil 7) CN7,CN47 Connector for thermistors 8) CN24 Connector for communicate between the control board and the module board 9) CN26, CN27 Connector to N and P of the module board 0) CN5 Connector for communicate between indoor and outdoor unit ) CN5 Connector for electric expansion valves PCB (2) (Module PCB) For U09/2BEFFRA CN0 Connector for the DC power 5V and 5V form the control PCB CN Connector for communicating between the control board and the module board P (CN), N (CN5) Connector for capacitance board LI (CN7), LO (CN6) Connector for reactor CN2, CN3, CN4 Connector for the U, V, W wire of the compressor Notes: Other Designations PCB () (Control PCB) ) FUSE, (25A, 250VAC); FUSE 2(A, 250VAC) 2) LED Keep light representative normal, if keep flash interval representative trouble Alarm 3) RV, RV2, RV3 Varistor Domestic air conditioner
PCB () Printed circuit board connector wiring diagram CN6 CN7 CN3 CN CN2 CN23 CN24 CN26 CN27 CN9 CN0 CN5 CN CN5 CN47 CN7 CN22 2 Domestic air conditioner
PCB(2) Printed circuit board connector wiring diagram CN6 CN7 CN CN0 CN5 CN4 CN3 CN2 CN 3 Domestic air conditioner
Functions and control Wiring diagrams INDOOR UNIT OUTDOOR WIRING DIAGRAM 000588937 3 Domestic air conditioner
7. Functions and control 7. Main functions and control specification Functions and control 7.. The operation frequency of outdoor unit and its control 7... The operation frequency control of compressor The operation frequency scope of compressor Mode Minimum operation frequency Maximum operation frequency Heating 09K/2K 24 Hz /25Hz 65 Hz /85Hz Refrigeration 09K/2K 24 Hz /25Hz 99 Hz /00Hz 7...2 The starting of compressor When the compressor is started for the first time, it must be kept under the conditions of 38Hz,58Hz,88Hz for 30second,one minute, one minute (the overheating protection of the outdoor unit air-blowing temperature, immediately decrease the frequency when the compressor is overflowing and releasing the pressure) then it can be operated towards the target frequency. When the machine runs normally, there s no such process. After starting the compressor for operation, the compressor should run according to the calculated frequency, and every determined frequency for protection should be prior to the calculated frequency. 7...3 The speeds of increasing or decreasing the frequency of the compressor The speed of increasing or decreasing the frequency rapidly -----------HZ/second The speed of increasing or decreasing the frequency slowly 2 -----------HZ/0seconds 7...4 The calculation of the compressor s frequency Refrigeration/dehumidification mode: Pn=(Nh_c- S_c)*0 50 Pn=(Nh_c- S_c) *0 50 outdoor environment control PID control Heating mode: Pn=(S_c -Nh_c) *0 60 outdoor environment control Pn=(S_c -Nh_c) *0 60 PID control (Nh_c=indoor environment temperature S_c=setting temperature) The minimum/maximum frequency limitation A While refrigerating: F-MAX-r is the maximum operation frequency of the compressor; F-MIN-r is the minimum operation frequency of the compressor. B While heating: F-MAX-d is the maximum operation frequency of the compressor; F-MIN-d is the minimum operation frequency of the compressor. 2 The frequency limitation which is affected by the environment temperature. (Wh_c= environment temperature) Heating mode: Serial No. Temperature scope Frequency limitation 09K/2K Wh_c<-2 Max_hz 99HZ/99 HZ 2 Wh_c<-8 Max_hz2 99HZ/99 HZ 5 Domestic air conditioner
Functions and control 3 Wh_c<-2 Max_hz3 99HZ/95 HZ 4 Wh_c<5 Max_hz4 88HZ/87 HZ 5 Wh_c<0 Max_hz5 70HZ/83 HZ 6 Wh_c<7 Max_hz6 59HZ/64 HZ 7 Wh_c<20 Max_hz7 49HZ/60 HZ 8 Wh_c> 20 Max_hz8 42HZ/56 HZ Remarks: The above are the maximum frequency limitations of the complete appliance which are affected by the environment, and they have nothing to do with the ability of the indoor unit. Refrigeration/dehumidification mode: Serial No. Temperature scope Frequency limitation 09K/2K Wh_c<6 Max_hz 3HZ/52 HZ 2 Wh_c<22 Max_hz2 37HZ/55 HZ 3 Wh_c<29 Max_hz3 47HZ/63 HZ 4 Wh_c<32 Max_hz4 54HZ/68 HZ 5 Wh_c<40 Max_hz5 62HZ/85 HZ 6 Wh_c<48 Max_hz6 64HZ/7 HZ 7 Wh_c>=48 Max_hz7 33HZ/47 HZ Remarks: the above are not only the maximum frequency limitations of the complete appliance which are affected by the environment, but also the maximum ability limitation of the system. When the starting ability is not the maximum, its maximum frequency limitation is calculated by the following equations: The frequency limitation which is affected by the temperature and under the condition of actual ability the actual running system ability*the maximum frequency which is limited by the temperature and under the condition of maximum ability/the maximum designing ability of the system Refrigeration/dehumidification mode: The indoor setting airflow speed The percentage of the rated frequency K (09K/2K) Heating mode: The indoor setting airflow speed The percentage of the rated frequency K (09K/2K) Low Medium Quiet 70%/70% 85%/85% 54%/42% Low Medium Quiet 80%/80% 90%/90% 5%/50% The calculation of the actual output frequency: F= F-ED-*(rated frequency) K F-ED-*(rated frequency)= The frequency which is limited by the outdoor environment temperature Notes: When refrigerating, it is needed to satisfy 6 Domestic air conditioner
Functions and control F-MIN-d(compressor s Min_hz)< F<F-MAX-d(compressor s Max_hz) When heating, it is needed to satisfy F-MIN-r (compressor s Min_hz)< F<F-MAX-r (compressor s Max_hz) PID control : The innital frequency Sn is determined by Pn. We can calculate Hzoutf according to the value of Kp,Ki,Kd, Out_gain,Pn.Then, Fn = Sn + Hzoutf. The value of Fn is calculated in each sample time (60 seconds),and Fn is adujusted according to previous frequency of Sn and filtered output of Hzoutf. 7..2 The outdoor fan control (Exchange fan) When the fan is changed among every airflow speed (including stop blowing), in order to avoid the airflow speed from skipping frequently, it must be kept under each mode for over 30 seconds, and then it can be changed to another mode (when refrigerating, the time is changed to 5 seconds). 7..2. The outdoor fan control Within three minutes of compressor starting, the compressor is controled according to the ambient temperature. Tao Tao <22 22 < Tao <28 Tao 29 Refrigeration/dehumidification (09K/2K) 2nd level /3 level 3rd level /5th level 5th level /7th level Tao Tao <<0 0 < Tao <6 Tao 6 Heating 7th level /7th level 5th level /5th level 3rd level /3rd level After 3 minutes, the compressor is controled according to the ambient temperature and the frequency of the compressor. Refrigeration/dehumidification frequency Hz 09K 2K) Tao <38 Hz 30 Hz 38 Hz 30 Hz -52 Hz 60 Hz 52 Hz 60 Hz 22 2nd level 3rd level 5 th level 22-28 3rd level 5 th level 7 th level 28 Heating frequency Hz (09K/2K) 7 th level <5 Hz 5-70 Hz 70 Hz 0 2nd level 3rd level 5 th level Tao 0-7 3rd level 5 th level 7 th level 7 2nd level 7..3 The control of the outdoor Electronic expansion valve (EEV) (09K series have no this function) In cooling mode, the EEV opening range is 20~480 steps. The EEV opening is 20 steps when unit is off. In heating mode, the EEV opening range is 60~480 steps. The EEV opening is 60 steps when unit is off. After outdoor unit is off, the EEV opening keep the current on for 5 s, then open the EEV completely for 2 minutes, then become 20 steps (cooling) or 60 steps (heating). The EEV opening will increase if SH (superheat degree) >0 while decrease if SH<0. 7 Domestic air conditioner
Functions and control Adjust frequency: If SH =0, 60s/ step If SH 3,and SH=0, 0s/ step. If 3 SH 0, 30s/ step. SH= current SH- last SH SH= Ts (suction temp)-tc (indoor coil temp)-tsh (fixed data, depend on different models, -~2) 7..4 Four way control For the details of defrosting four-way valve control, see the defrosting process. Four way working in other ways: Under the mode of heating, open the four-way valve, when the compressor is not started or changed to non-heating mode, make sure the compressor is stoped for 2 minutes, and then close the four-way valve. 7..5 Protection function 7..5. TTC high temperature-preventing protection Once the machine is started, it can run TTC(air-blowing temp) overheating protection of air-blowing, but air-blowing sensor malfunction must alarm after 4 minutes during which the compressor is started (during the course of self-detection, there s no such limitation) Sensor detection methods: 00 times (one cycle of procedure run is one time, and about 5ms, detection method for each time: continuously sampling for 8 times, then order them and take the mean value of the middle 2 values), take the mean value. TTC 09K 2K Abnormal stop 0 0 Decreasing the frequency rapidly HZ/second 07(06) Decreasing the frequency slowly (HZ/0seconds) 05(04) The frequency doesn t change. 02(02) Increasing the frequency (HZ/0second) 95(93) Increasing the frequency HZ/second TTC>=0 lasts for 20 seconds. Overheating protection of air-blowing, alarm malfunction to the indoor, others don t last. 7..5.2 TC high temperature-preventing control of the indoor heating unit Tpg_indoor is the highest value of the effective indoor unit (start it and it is in accord with the running state). TC=indoor coil temp. The indoor heat exchanger sensor tests the temperature of the indoor heat exchanger. If the temperature is higher than 63, decrease the rotate speed of the compressor and do the high temperature-preventing protection of the indoor heat exchanger; if the temperature of the indoor heat exchanger is lower than 45, recover to the normal control. 8 Domestic air conditioner
Functions and control (09K2K) TC( ) The compressor stops Fgh_t 63 /63 Fgh_t 2 Fgh_t2 2 N Decreasing the frequency rapidly Fgh_t2 60 /59 P Decreasing the frequency slowly Fgh_t3 57 /56 Fgh_t3 2 Fgh_t4 2 Q Prohibiting increasing the frequency Fgh_t4 52 /53 R Increasing slowly Fgh_t5 40 /40 Fgh_t5 2 Normal N Decreasing at the speed of HZ/ second P Decreasing at the speed of Hz/0 seconds Q Continue to keep the last-time instruction cycle R Increasing at the speed of Hz/0seconds Remarks: the outdoor unit 7..5.3 The control of preventing the over current of the compressor: During the starting process of the compressor, if the current of the compressor is greater than 2.5A for 3 seconds, stop the compressor and alarm, after 3 minutes, start it again, if such state appears 3 times in 20 minutes, stop the compressor and alarm, and confirm the malfunction. Then continue to run it only after the power is off. During the starting process of the compressor, if the AC current is greater than 9A, the frequency of the compressor decreases at the speed of HZ/second. During the starting process of the compressor, if the AC current is greater than 8A, the frequency of the compressor decreases at the speed of 0.HZ/second. During the starting process of the compressor, if the AC current is greater than 7.5A, the frequency of the compressor increases at the prohibited speed. During the starting process of the compressor, if the AC current is greater than 6.5A, the frequency of the compressor increases at the speed of no faster than 0.HZ/second. 7..5.4 The protection function of AC current: During the starting process of the compressor, if the AC current is greater than 2.5A for 3 seconds, stop the compressor and alarm, after 3 minutes, start it again, if such state appears 3 times in 20 minutes, stop the compressor and alarm, and confirm the malfunction. Then continue to run it only after the the power is off. During the starting process of the compressor, if the AC current is greater than 9A, the frequency of the compressor decreases at the speed of HZ/second. During the starting process of the compressor, if the AC current is greater than 8A, the frequency of 9 Domestic air conditioner
Functions and control the compressor decreases at the speed of 0.HZ/second. During the starting process of the compressor, if the AC current is greater than 7.5A, the frequency of the compressor increases at the prohibited speed. During the starting process of the compressor, if the AC current is greater than 6.5A, the frequency of the compressor increases at the speed of no faster than 0.HZ/second. Remarks: when the outdoor temperature is high, there s compensation for AC current protection. () When the outdoor environment temperature is higher than 40, AC current protection value decreases by 2A/A(09K/2K). (2) When the outdoor environment temperature is higher than 50, AC current protection value decreases by 3A/2A(09K/2K). 7..5.5 Anti-freezing protection of the indoor heat exchanger When refrigerating/heating, prevent freezing. Tpg_indoor is the minimum value of the effective indoor unit (start it and it is in accord with the running state). //ice_temp_3+5 ice_temp_3+3 9 Increasing slowly 8 //ice_temp_3+2 Keeping the frequency ice_temp_3 7 7 ice_temp_2 5 Decreasing slowly ice_temp_ 3 Decreasing rapidly ice_temp_ Stop When Tpg_indoor ice_temp_, the frequency of the compressor decreases at the speed of HZ/second. When Tpg_indoor ice_temp_2, the frequency of the compressor decreases at the speed of HZ/0seconds. When Tpg_indoor begins to rise again, and ice_temp_2 Tpg_indoor ice_temp_3, the frequency of the compressor doesn t change. When ice_temp_3 Tpg_indoor ice_temp_3+3, the frequency of the compressor increases at the speed of HZ/0seconds. For example, Tpg_indoor 0 last for 2 minutes, and then the outdoor unit will stop, and report underload malfunction, but don t send malfunction report to the indoor. The compressor stops for more than 3 minutes, Tpg_indoor> ice_temp_3+2, the compressor recovers. 7..5.6 The frequency limitation of modification rate In the field which is controlled by high frequency, if the modification rate is not high enough, the control-driven chip will enter into weak magnetic control, this will help to relieve the problem of 20 Domestic air conditioner
Functions and control modification rate. If during the course of weak magnetic control, the modification rate is still not high enough, enter into the control of decreasing frequency until the alarm of modification rate is relieved. 7..5.7 Temperature protection of the outdoor refrigerating coil When the defrosting temperature and the sensor s temperature are higher than 68, the frequency of the compressor decreases hz/0seconds. Keep the frequency until it decreases to the lowest frequency. When the temperatures are lower than 68 and higher than 62, keep the frequency of the compressor. When the temperatures are lower than 62, relieve the defrosting temperature protection. 7.2 Value of Thermistor Ambient Sensor, Defrosting Sensor, Pipe sensor R25 =0K 3% B25 /50 =3700K 3% Temp.( ) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) -30 65.270 47.9497 32.3678 -.94.75-29 55.5754 39.5600 25.0806 -.93.74-28 46.5609 3.7022 8.2434 -.9.73-27 38.285 24.3392.8256 -.89.7-26 30.237 7.4366 05.7989 -.87.70-25 22.8484 0.9627 00.367 -.85.69-24 5.9272 04.8882 94.849 -.83.67-23 09.440 99.858 89.806 -.8.66-22 03.3598 93.8305 85.03 -.80.64-2 97.6556 88.7989 80.6728 -.78.63-20 92.3028 84.0695 76.507 -.76.62-9 87.2775 79.6222 72.5729 -.74.60-8 82.5577 75.4384 68.870 -.72.59-7 78.230 7.500 65.385 -.70.57-6 73.9543 67.7939 62.0907 -.68.55-5 70.0342 64.3023 58.9863 -.66.54-4 66.3463 6.023 56.0565 -.64.52-3 62.8755 57.90 53.2905 -.62.5-2 59.6076 54.9866 50.678 -.60.49-56.5296 52.2278 48.2099 -.58.47-0 53.6294 49.6244 45.877 -.56.46-9 50.8956 47.666 43.674 -.54.44-8 48.378 44.8454 4.585 -.5.42-7 45.8860 42.6525 39.62 -.49.40-6 43.592 40.5800 37.7429 -.47.39-5 4.4249 38.6207 35.9739 -.45.37-4 39.3792 36.7676 34.2983 -.43.35-3 37.4465 35.044 32.708 -.4.33-2 35.6202 33.3552 3.2062 -.38.3 2 Domestic air conditioner
Functions and control - 33.8936 3.7844 29.7796 -.36.29 0 32.2608 30.2968 28.4267 -.34.28 30.762 28.8875 27.43 -.32.26 2 29.2545 27.559 25.9250 -.29.24 3 27.8708 26.2858 24.7686 -.27.22 4 26.5605 25.085 23.6704 -.25.20 5 25.393 23.9462 22.6273 -.23.8 6 24.432 22.8656 2.636 -.20.6 7 23.0284 2.8398 20.6939 -.8.4 8 2.974 20.8659 9.7982 -.5.2 9 20.9688 9.9409 8.9463 -.3.09 0 20.076 9.062 8.358 -..07 9.49 8.2270 7.3646 -.08.05 2 8.2580 7.433 6.6305 -.06.03 3 7.4442 6.6782 5.935 -.03.0 4 6.67 5.960 5.2657 -.0 0.99 5 5.9366 5.2770 4.635-0.98 0.96 6 5.2385 4.6268 4.027-0.96 0.94 7 4.5748 4.0079 3.450-0.93 0.92 8 3.9436 3.485 2.907-0.9 0.90 9 3.343 2.8572 2.3778-0.88 0.87 20 2.778 2.3223.8780-0.86 0.85 2 2.2280.826.40-0.83 0.83 22.702.3267 0.9459-0.8 0.80 23.272 0.8634 0.54-0.78 0.78 24 0.7475 0.426 0.0964-0.75 0.75 25 0.3000 0.0000 9.7000-0.75 0.75 26 9.8975 9.5974 9.2980-0.76 0.76 27 9.529 9.232 8.948-0.80 0.80 28 9.454 8.8465 8.5496-0.84 0.83 29 8.7942 8.4964 8.203-0.87 0.86 30 8.4583 8.62 7.869-0.9 0.90 3 8.37 7.8428 7.5522-0.95 0.93 32 7.8299 7.5377 7.2498-0.98 0.97 33 7.5359 7.246 6.96 -.02.00 34 7.2546 6.9673 6.6854 -.06.04 35 6.9852 6.7008 6.4222 -.0.07 36 6.7273 6.4459 6.707 -.3. 37 6.4803 6.202 5.9304 -.7.4 38 6.2437 5.9687 5.7007 -.2.8 39 6.070 5.7454 5.482 -.25.22 40 5.7997 5.536 5.272 -.29.25 4 5.594 5.3269 5.0704 -.33.29 42 5.396 5.308 4.8783 -.37.33 22 Domestic air conditioner
Functions and control 43 5.200 4.9430 4.6944 -.4.36 44 5.063 4.7630 4.585 -.45.40 45 4.8400 4.5905 4.3500 -.49.44 46 4.6708 4.4252 4.887 -.53.47 47 4.5083 4.2666 4.0342 -.57.5 48 4.3524 4.45 3.8862 -.6.55 49 4.2026 3.9686 3.7443 -.65.59 50 4.0588 3.8287 3.6084 -.70.62 5 3.9206 3.6943 3.4780 -.74.66 52 3.7878 3.5654 3.353 -.78.70 53 3.660 3.446 3.2332 -.82.74 54 3.5374 3.3227 3.83 -.87.78 55 3.495 3.2085 3.0079 -.9.82 56 3.3060 3.0989 2.902 -.95.85 57 3.969 2.9935 2.8005-2.00.89 58 3.099 2.8922 2.7029-2.04.93 59 2.9909 2.7948 2.6092-2.08.97 60 2.8936 2.702 2.593-2.3 2.0 6 2.8000 2.62 2.4328-2.7 2.05 62 2.7099 2.5246 2.3498-2.22 2.09 63 2.6232 2.443 2.2700-2.26 2.3 64 2.5396 2.36 2.932-2.3 2.7 65 2.459 2.2840 2.95-2.36 2.2 66 2.385 2.2098 2.0486-2.40 2.25 67 2.3068 2.383.9803-2.45 2.29 68 2.2347 2.0695.947-2.49 2.34 69 2.652 2.0032.856-2.54 2.38 70 2.0983.9393.7908-2.59 2.42 7 2.0337.8778.7324-2.63 2.46 72.974.886.676-2.68 2.50 73.93.764.629-2.73 2.54 74.8533.7064.5697-2.78 2.58 75.7974.6533.594-2.83 2.63 76.7434.602.470-2.88 2.67 77.693.5528.4243-2.92 2.7 78.6409.505.3794-2.97 2.75 79.5923.4592.3360-3.02 2.80 80.5454.449.2942-3.07 2.84 8.5000.372.2540-3.2 2.88 82.4562.3308.25-3.7 2.93 83.439.290.776-3.22 2.97 84.3730.2525.45-3.27 3.0 85.3335.253.066-3.32 3.06 86.2953.794.0730-3.38 3.0 23 Domestic air conditioner
Functions and control 87.2583.448.0405-3.43 3.5 88.2226.3.0092-3.48 3.9 89.880.0789 0.9789-3.53 3.24 90.546.0476 0.9497-3.58 3.28 9.223.074 0.925-3.64 3.33 92.090 0.9882 0.8942-3.69 3.37 93.0607 0.9599 0.8679-3.74 3.42 94.034 0.9326 0.8424-3.80 3.46 95.0030 0.906 0.879-3.85 3.5 96 0.9756 0.8806 0.794-3.90 3.55 97 0.9490 0.8558 0.77-3.96 3.60 98 0.9232 0.839 0.7489-4.0 3.64 99 0.8983 0.8088 0.7275-4.07 3.69 00 0.874 0.7863 0.7067-4.2 3.74 0 0.8507 0.7646 0.6867-4.8 3.78 02 0.828 0.7436 0.6672-4.23 3.83 03 0.806 0.7233 0.6484-4.29 3.88 04 0.7848 0.7036 0.6303-4.34 3.92 05 0.764 0.6845 0.627-4.40 3.97 06 0.744 0.666 0.5957-4.46 4.02 07 0.7247 0.6482 0.5792-4.5 4.07 08 0.7059 0.6308 0.5632-4.57 4.2 09 0.6877 0.640 0.5478-4.63 4.6 0 0.6700 0.5977 0.5328-4.69 4.2 0.6528 0.5820 0.583-4.74 4.26 2 0.636 0.5667 0.5043-4.80 4.3 3 0.6200 0.558 0.4907-4.86 4.36 4 0.6043 0.5374 0.4775-4.92 4.4 5 0.589 0.5235 0.4648-4.98 4.45 6 0.5743 0.500 0.4524-5.04 4.50 7 0.5600 0.4968 0.4404-5.0 4.55 8 0.5460 0.484 0.4288-5.6 4.60 9 0.5325 0.477 0.475-5.22 4.65 20 0.594 0.4597 0.4066-5.28 4.70 Discharging Sensor R80 =50K 3% B25/80 =4450K 3% Temp.(( )) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) -30 4646.0505 206.7438 9924.4999-2.96 2.45-29 3654.707 267.8730 9290.2526-2.95 2.44-28 2735.8378 053.3695 8700.6388-2.93 2.44-27 885.336 9847.7240 852.2338-2.92 2.43 24 Domestic air conditioner
Functions and control -26 096.653 922.80 764.8972-2.9 2.42-25 0365.4565 8622.849 766.7474-2.90 2.42-24 9687.0270 8074.3787 6724.389-2.88 2.4-23 9057.234 7564.2244 63.643-2.87 2.4-22 8472.2852 7089.474 5927.0206-2.86 2.40-2 7928.727 6647.4547 5568.2222-2.84 2.39-20 7423.3626 6235.709 5233.3554-2.83 2.39-9 6953.2930 585.9864 4920.679-2.82 2.38-8 655.8375 5494.2064 4628.5894-2.80 2.37-7 608.5393 560.462 4355.6078-2.79 2.37-6 5729.43 4848.9963 400.3708-2.77 2.36-5 5375.5683 4558.906 386.620-2.76 2.35-4 5045.94 4286.5535 3638.938-2.75 2.34-3 4738.44 4032.7098 3429.09-2.73 2.34-2 445.4586 3795.390 3233.039-2.72 2.33-483.5548 3573.4260 3049.532-2.70 2.32-0 3933.3289 3365.7336 2877.4527-2.69 2.3-9 3699.539 37.348 276.0828-2.67 2.30-8 3480.9407 2989.2460 2564.6945-2.66 2.29-7 3276.5302 288.673 2422.639-2.64 2.28-6 3085.2854 2658.8058 2289.264-2.63 2.28-5 2906.285 2508.926 263.9230-2.6 2.27-4 2738.6777 2368.358 2046.96-2.60 2.26-3 258.6752 2236.3876 935.537-2.58 2.25-2 2434.5487 22.5459 83.4826-2.56 2.24-2296.6230 996.2509 733.6024-2.55 2.23 0 267.2730 887.008 64.4966-2.53 2.22 2045.99 784.3336 554.793-2.52 2.2 2 932.0242 687.844 473.460-2.50 2.20 3 825.0899 597.043 396.2333-2.48 2.9 4 724.6540 5.6468 323.755-2.47 2.7 5 630.2870 43.2787 255.4324-2.45 2.6 6 54.5904 355.663 9.0048-2.43 2.5 7 458.938 284.3593 30.2298-2.4 2.4 8 379.7528 27.2282 072.883-2.40 2.3 9 305.9472 53.9626 08.748-2.38 2.2 0 236.4792 094.3200 967.6334-2.36 2. 7.075 038.0743 99.3533-2.35 2.09 2 09.466 985.046 873.7359-2.33 2.08 3 05.4226 934.9440 830.620-2.3 2.07 4 996.769 887.6792 789.8583-2.29 2.06 5 945.404 843.0486 75.3077-2.27 2.04 6 896.498 800.8922 74.8380-2.26 2.03 7 850.6086 76.0603 680.3265-2.24 2.02 25 Domestic air conditioner
Functions and control 8 807.3024 723.434 647.6580-2.22 2.00 9 766.422 687.8205 66.7252-2.20.99 20 727.872 654.596 587.427-2.8.98 2 69.3524 622.36 559.6694-2.6.96 22 656.8979 592.83 533.3634-2.4.95 23 624.3328 563.6604 508.426-2.2.93 24 593.5446 536.6540 484.7796-2.0.92 25 564.4275 5.0760 462.350-2.09.90 26 536.9865 486.9352 44.56-2.07.89 27 5.005 464.0500 42.0258-2.05.87 28 486.45 442.3499 40.946-2.03.86 29 463.208 42.7683 383.7626-2.0.84 30 44.0535 402.2430 366.575 -.99.83 3 420.43 383.75 350.30 -.97.8 32 400.3242 366.295 334.5542 -.95.80 33 38.5350 349.434 39.7460 -.93.78 34 363.776 333.580 305.6645 -.90.76 35 346.876 38.526 292.2709 -.88.75 36 330.7839 304.25 279.5286 -.86.73 37 35.5682 290.699 267.403 -.84.7 38 30.254 277.6976 255.8620 -.82.70 39 287.428 265.49 244.8745 -.80.68 40 274.3905 253.7288 234.48 -.78.66 4 262.0206 242.66 224.4465 -.76.64 42 250.2676 232.0436 24.9529 -.74.63 43 239.0983 22.9825 205.9065 -.7.6 44 228.4809 22.4060 97.2844 -.69.59 45 28.3860 203.2887 89.0648 -.67.57 46 208.7855 94.6066 8.2273 -.65.55 47 99.653 86.3369 73.7524 -.63.54 48 90.9639 78.4584 66.627 -.60.52 49 82.6945 70.9508 59.88 -.58.50 50 74.8228 63.795 53.3249 -.56.48 5 67.3280 56.9733 47.268 -.53.46 52 60.904 50.4683 4.2090 -.5.44 53 53.394 44.264 35.5577 -.49.42 54 46.936 38.3454 30.598 -.47.40 55 40.7403 32.6980 25.0027 -.44.38 56 34.8559 27.308 20.0746 -.42.36 57 29.2457 22.630 5.3645 -.40.34 58 23.8956 7.2504 0.868 -.37.32 59 8.7926 2.5589 06.5564 -.35.30 60 3.924 08.0776 02.4388 -.32.28 6 09.2784 03.796 98.5000 -.30.26 26 Domestic air conditioner
Functions and control 62 04.8443 99.7046 94.735 -.28.23 63 00.62 95.7939 9.253 -.25.2 64 96.5692 92.0553 87.6735 -.23.9 65 92.7088 88.4805 84.3690 -.20.7 66 89.02 85.064 8.2048 -.8.5 67 85.4976 8.7908 78.744 -.5.2 68 82.303 78.665 75.275 -.3.0 69 78.96 75.6668 72.4902 -.0.08 70 75.8343 72.8004 69.8249 -.08.06 7 72.896 70.056 67.2703 -.05.03 72 70.0770 67.4283 64.823 -.03.0 73 67.3844 64.95 62.473 -.00 0.99 74 64.8080 62.5006 60.22-0.98 0.96 75 62.3423 60.906 58.0609-0.95 0.94 76 59.982 57.9770 55.9885-0.92 0.92 77 57.7223 55.8552 53.9998-0.90 0.89 78 55.5583 53.820 52.092-0.87 0.87 79 53.4856 5.8706 50.259-0.85 0.84 80 5.5000 50.0000 48.5000-0.85 0.84 8 49.7063 48.2057 46.7083-0.85 0.85 82 47.9835 46.4842 44.99-0.89 0.89 83 46.3286 44.8323 43.3452-0.93 0.92 84 44.7385 43.2468 4.7672-0.96 0.95 85 43.205 4.7248 40.2540 -.00 0.99 86 4.7386 40.2604 38.7996 -.03.02 87 40.324 38.8545 37.4048 -.07.06 88 38.9643 37.5045 36.0668 -..09 89 37.6569 36.2078 34.783 -.4.3 90 36.3996 34.9622 33.553 -.8.6 9 35.903 33.7653 32.3689 -.22.9 92 34.0269 32.65 3.2338 -.26.23 93 32.9075 3.5096 30.438 -.30.27 94 3.8302 30.4467 29.0970 -.33.30 95 30.7933 29.4246 28.095 -.37.34 96 29.7950 28.447 27.254 -.4.37 97 28.8337 27.496 26.970 -.45.4 98 27.9078 26.5864 25.3048 -.49.44 99 27.060 25.70 24.4470 -.53.48 00 26.569 24.8685 23.6222 -.57.52 0 25.3290 24.0574 22.829 -.6.55 02 24.53 23.2765 22.0662 -.65.59 03 23.7620 22.5245 2.3323 -.69.63 04 23.0205 2.8002 20.626 -.73.66 05 22.3055 2.025 9.9465 -.77.70 27 Domestic air conditioner
Functions and control 06 2.659 20.4303 9.2924 -.8.74 07 20.9508 9.7825 8.6626 -.85.77 08 20.309 9.582 8.0563 -.89.8 09 9.6899 8.5564 7.4723 -.93.85 0 9.0924 7.976 6.9098 -.98.89 8.557 7.466 6.3680-2.02.93 2 7.9590 6.8769 5.8458-2.06.96 3 7.424 6.3564 5.3427-2.0 2.00 4 6.9023 5.8542 4.8577-2.5 2.04 5 6.400 5.3696 4.3902-2.9 2.08 6 5.967 4.9020 3.9394-2.23 2.2 7 5.4489 4.4506 3.5047-2.27 2.6 8 4.9968 4.049 3.0855-2.32 2.9 9 4.5599 3.5942 2.68-2.36 2.23 20 4.376 3.879 2.2909-2.4 2.27 2 3.7294 2.7955.944-2.45 2.3 22 3.3347 2.465.550-2.50 2.35 23 2.953 2.0503.2003-2.54 2.39 24 2.5840.6965 0.867-2.58 2.43 25 2.2270.3545 0.5348-2.63 2.47 26.887.0240 0.29-2.68 2.5 27.5475 0.7046 9.942-2.72 2.55 28.2242 0.3957 9.697-2.77 2.59 29 0.92 0.0970 9.3352-2.8 2.63 30 0.6084 9.8082 9.0602-2.86 2.67 3 0.35 9.5288 8.7945-2.9 2.7 32 0.032 9.2586 8.5378-2.95 2.75 33 9.7563 8.997 8.2895-3.00 2.80 34 9.490 8.744 8.0495-3.05 2.84 35 9.2322 8.4993 7.875-3.09 2.88 36 8.9824 8.2623 7.593-3.4 2.92 37 8.7404 8.0329 7.3760-3.9 2.96 38 8.5059 7.808 7.660-3.24 3.00 39 8.2787 7.5958 6.9629-3.29 3.04 40 8.0584 7.3875 6.7664-3.33 3.09 28 Domestic air conditioner
8.Dimensional drawings Dimensinal drawings unit:mm 0 4 0 4 780 9.Center of gravity unit:mm 0 4 0 Domestic air conditioner
0 Service Diagnosis Service diagnosis 0. Caution for Diagnosis The operation lamp flashes when any of the following errors is detected.. 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 name parameter picture Compressor Rated voltage:220-230v Rated current:4.8a Rated frequency: 50/60HZ Fan motor Rated voltage:220-230v Rated current:0.2a Rated frequency: 50/60HZ Reactor Rated voltage:220-230v Rated current:0.5a Rated frequency: 50/60HZ 4-way valve Rated voltage:220-230v Rated current:0.a Rated frequency: 50/60HZ 30 Domestic air conditioner
Service diagnosis 0.2 Problem Symptoms and Measures Symptom None of the units operates 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 Operation sometimes stops. Check the power supply. A power failure of 2 to 0 cycles can stop air conditioner operation. Equipment operates but does not cool, or does not heat (only for heat pump) Check for faulty operation of the electronic expansion valve. Diagnosis by service port pressure and operating current. 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. Check for insufficient gas. Large operating noise and vibrations Check the installation condition. Check to make sure that the required spaces for installation (specified in the Technical Guide, etc.) are provided. 3 Domestic air conditioner
Service diagnosis 0.3 Error Codes and Description indoor display Code indication Indoor displaying panel code indication Other display Only For 498 and 498A display (Red/Green Time Run,) Outdoor (LED flash times) Indoor and Outdoor E7 5 Indoor Malfunction Outdoor Malfunction fault description Reference Page Communication fault between indoor and Page.43 outdoor units E -- Room temperature sensor failure Page 33 E2 -- Heat-exchange sensor failure Page 33 E4 -- Indoor EEPROM error Page 34. E9 2 High-work intense protection Page 46 E4 -- Indoor fan motor malfunction Page 35 F2 Outdoor EEPROM error Page.34 F 2 The protection of IPM Page.38 Overcurrent protection F22 3 of AC electricity for Page.39 the outdoor model Communication fault F3 4 between the IPM and Page.40 outdoor PCB F9 6 Power voltage is too high or low Page.4 F4 8 Overheat protection for Discharge temperature Page.42 F2 0 Defrost temperature sensor failure Page 33 F7 Suction temperature sensor failure Page.33 F6 2 Ambient temperature sensor failure Page 33 F25 3 Discharge temperature sensor failure Page 33 F 8 deviate from the normal for the compressor Page.45 F28 9 Loop of the station detect error Page.45 F2 24 Overcurrent of the compressor Page.39 F8 9 Outdoor DC fan motor fault Page 36 Overcurrent protection for F23 25 single-phase of the Page.39 compressor 32 Domestic air conditioner
Service diagnosis 0.3. Thermistor or Related Abnormality Indoor Display Outdoor display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes E: Room temperature sensor failure E2: Heat-exchange sensor failure LED flash 0 times Defrost temperature sensor failure LED flash times Suction temperature sensor failure LED flash 2 times Ambient temperature sensor failure LED flash 3 times Discharge temperature sensor failure 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 Faulty connector connection Faulty thermistor Faulty PCB Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or else parts damage may be occurred. Check the connector connection. Is it normal? NO Correct the connection Yes Thermistor resistance check Is it normal? NO Replace the thermistor 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. 33 Domestic air conditioner
Service diagnosis 0.3.2 EEPROM abnormal Indoor Display Indoor display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting E4: Indoor EEPROM error F2: Outdoor EEPROM error; Outdoor LED flash times The Data detected by the EEPROM are used to determine MCU When the data of EEPROM is error or the EEPROM is damaged 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. 34 Domestic air conditioner
Service diagnosis 0.3.3 Indoor AC fan motor malfunction Indoor Display E4 Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation when the detected rotation feedback signal don t received in 2 minutes Operation halt due to breaking of wire inside the fan motor. Fan motor overheat protection Operation halt due to breaking of the fan motor lead wires Detection error due to faulty indoor unit PCB * Caution Be sure to turn off power switch before connect or disconnect connector, or else parts damage may be occurred. Check whether terminals on indoor pcb is well? Pull out the terminals on the indoor mainboard and reinsert them. Electrify the machine again and turn it on in the cooling operation, Measure voltage between the positions and 3 of Terminal CN5 on the indoor PCB the voltage is about 90-220vac check whether motor can run when turn on the unit Yes Measure whether there is voltage pulse (0-5VDC) between the positions middle wire and black wire of Terminal CN2 on the indoor PCB the indoor motor is damaged and need replace Is it ok? the indoor pcb is damaged and need replace 35 Domestic air conditioner
Service diagnosis 0.3.4 Outdoor DC fan motor fault Outdoor display LED flash 9 times Method of Malfunction Detection Malfunction Decision Conditions DC fan motor is detected by checking the fan running condition and so on when the data of EEPROM is error or the EEPROM is damaged Supposed DC fan motor protection dues to the DC fan motor faulty Causes DC fan motor protection dues to faulty PCB Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. 36 Domestic air conditioner
Service diagnosis 37 Domestic air conditioner
Service diagnosis 0.3.5 IPM protection Outdoor display: / F LED flash 2 times Method of Malfunction Detection IPM protection is detected by checking the compressor running condition and so on Malfunction The system leads to IPM protection due to over current Decision The compressor faulty leads to IPM protection Conditions circuit component of IPM is broken and led to IPM protection Supposed IPM protection dues to the compressor faulty Causes 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, or else parts damage may be occurred. 38 Domestic air conditioner
Service diagnosis 0.3.6 Over-current of the compressor Outdoor Display: Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting F2 LED flash 3 or 24 or 25 times The current of the compressor is too high when the IPM Module is damaged or the compressor is damaged. power supply voltage is too low or too high Faulty IPM Module Faulty compressor 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. 39 Domestic air conditioner
Service diagnosis 0.3.7 The communication fault between IPM and outdoor PCB Outdoor display: LED flash 4 times Method of Malfunction Detection Communication is detected by checking the IPM module and the outdoor PCB Malfunction The outdoor PCB broken leads to communication fault Decision The IPM module broken leads to communication fault Conditions Supposed The outdoor PCB is broken Causes The IPM module is broken Communication wiring disconnected Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or else parts damage may be occurred. ) Check whether Terminal CN23 and CN24 on the outdoor mainboard CN0 and CN on IPM module 2) Check whether the connected wire between IPM and outdoor Are they good? NO ) Pull out and reinsert the terminals. 2) Replace connected wire YES Malfunction unsolved Electrify the machine again and turn it on, Check whether the voltage between and 2 of Terminal CN23 is about DC5V, Check whether the voltage between2 and 3 of Terminal CN23 is about DC5V, YES Replace the outdoor IPM module with a new one. NO Replace the outdoor mainboard with a new one 40 Domestic air conditioner
0.3.8 Power Supply Over or under voltage fault Outdoor display: LED flash 6 times The power supply is over voltage Service diagnosis Method of Malfunction Detection Malfunction Decision Conditions An abnormal voltage rise or fall is detected by checking the specified voltage detection circuit. An voltage signal is fed from the voltage detection circuit to the microcomputer Supposed Supply voltage not as specified Causes 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 Is it ok? Yes Maybe there is some disturbance No Test the outdoor power supply (+30VDC) with a multimeter. check whether the power is >50 V or <390V? Yes Change the IPM module ~230 is ok? NO Yes Change the IPM module NO This question may be caused by the power. Repair the power supply. 4 Domestic air conditioner
Service diagnosis 0.3.9 Overheat Protection For Discharge Temperature Outdoor display: F4 LED flash 8 times Method of Malfunction Detection Malfunction Decision Conditions The Discharge temperature control is checked with the temperature being detected by the Discharge pipe thermistor when the compressor discharge temperature is above 0 Supposed Electronic expansion valve defective Causes Faulty thermistor Faulty PCB 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, then measure the temperature at the exhaust temperature sensor of the compressor on the outdoor unit The temperature exceeds 0 shortly after the machine starts up? YES ) 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. NO Malfunctions occur after running for some time even though the measured temperature is below 0. Pull out the exhaust sensor and measure its resistance at standard temperatures according to the resistance-temperature table The results deviate much? YES The sensor is damaged. Replace the sensor with a new one. NO The outdoor mainboard is damaged and needs be replaced 42 Domestic air conditioner
0.3.0 The communication fault between indoor and outdoor Indoor display outdoor display E7 LED flash 5 times Service diagnosis Method of Malfunction Detection Communication is detected by checking the indoor PCB and the outdoor PCB. Malfunction The outdoor PCB broken leads to communication fault. Decision The indoor PCB broken leads to communication fault. Conditions Supposed Communication wiring disconnected. Causes The indoor PCB is broken. The outdoor PCB is broken. The Module PCB is broken. Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or else parts damage may be occurred. 43 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 to8v DC when only indoor charged. YES The indoor mainboard is damaged; replace it with a new one. 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 LED2 light of the outdoor NO The module pcb is damaged, replace it with a new one. YES Led light YES 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 YES The outdoor pcb is damaged, replace it with a new one. NO NO The outdoor pcb is well,and then check the cable Remove fan motor after switch off the power and restart the a/c,the led becomes light or flash. YES Fan motor is damaged replace it with a new one. NO Test the fan motor terminal resistance between pin 30V and 0V,or pin5v and 0V of CN22 are close to 0m with a multimeter NO Remove the connection cable between CN23 of outdoor pcb and CN0 of module pcb,the led becomes light or flash. YES The module pcb is damaged, replace it with a new one. YES NO The outdoor pcb is damaged, replace it with a new one. 44 Domestic air conditioner
Service diagnosis 0.3. Loss of synchronism detection Inverter side current detection is abnormal Outdoor Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting LED flash 8 times LED flash 9 times 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. Within 3 minutes after the machine is supplied with power and turned on with the remote controller, check whether the compressor can start up NO. The wiring of compressor is incorrect or the connection is poor; 2. The compressor is damaged YES At first, the compressor start up,soon the compressor stopped with the LED on the outdoor PCB blinks Hz 9/8 times YES IPM Module is damaged and needs replacing. Malfunction unsolved Maybe there is some disturbance the Malfunctions exist also, the compressor is damaged replace a new one 45 Domestic air conditioner
Service diagnosis 0.3.2 High work-intense protection Outdoor display Method of Malfunction Detection Malfunction Decision Conditions LED flash 2 times High work-intense control is activated in the heating mode if the temperature being sensed by the heat exchanger thermistor exceeds the limit. Activated when the temperature being sensed by the heat exchanger rises above 65 twices in 30 minutes. Supposed Faulty electronic expansion valve Causes Dirty heat exchanger Faulty heat-exchange sensor Insufficient gas 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 wind temperature is below 65 The malfunction is reported after the machine has run for some time? YES Check room temperature and pipe temperature sensor. 2 the temperature monitoring circuit of the indoor mainboard NO The indoor unit blows poorly due to blocked filters or poor condition of the fan? YES ) Clean the filters 2) Reinstall the fan. NO Use some tools to measure the pressure of system 46 Domestic air conditioner
Performance and curves diagrams.performence and curves diagrams. Cooling capacity-temperature curves indoor temp. performance curves cooling value-temerature table outdoor temp. DB/WB 0 5 20 25 30 35 38 40 43 2/5 964 968 896 83 282 2435 2335 2264 235 24/6 2067 2032 984 909 2322 257 254 2387 2223 27/9 236 2274 223 2078 2598 2869 2760 27 247 30/22 2444 2392 2340 220 2730 2990 292 2808 2626 32/23 2594 257 2446 2380 2882 370 32 2990 2799 35/24 2647 2598 2549 2405 3006 3279 380 3076 2855 cooling capacity and indoor/outdoor temp.curves 3500 cooling capacity (W) 3300 300 2900 2700 2500 2300 200 900 700 500 0 5 20 25 30 35 38 40 43 48 Domestic air conditioner
.2 Cooling power consumption value- temperature curves Performance and curves diagrams indoor temp. performance curves power consumption value-temp.table outdoor temp. DB/WB 0 5 20 25 30 35 38 40 43 2/5 634 635 62 378 520 674 89 939 07 24/6 646 635 620 385 539 676 863 963 028 27/9 702 689 67 42 593 768 898 064 5 30/22 79 704 688 428 604 77 920 087 6 32/23 74 735 699 460 637 88 07 57 238 35/24 735 722 708 465 665 846 036 90 263 500 power consumption and temp.curves power consumption(w) 300 00 900 700 500 300 00 0 5 20 25 30 35 38 40 43 indoor temp.(db/wb) 49 Domestic air conditioner
Performance and curves diagrams.3 Cooling discharge pressure curves performance curves cooling discharge pressure.table outdoor temp. (humidity 46%) indoor temp. DB/WB 2/5 27/9 35/24 0 945 200 232 5 938 2037 23 20 965 2064 234 25 2053 244 2228 30 2227 2385 257 35 2457 2546 274 38 2582 2734 2827 40 2984 3082 3244 43 3394 3484 3704 cooling discharge pressure and temp. curves 4000 discharge pressure (Kpa) 3500 3000 2500 2000 500 2/5 27/9 35/24 000 0 5 20 25 30 35 38 40 43 outdoor temp.(db/wb) 50 Domestic air conditioner
Performance and curves diagrams.4 Cooling suction pressure curves performance curves cooling suction pressure.table outdoor temp. (humidity 46%) DB/WB 2/5 indoor temp. 27/9 35/24 0 757 886 029 5 765 895 040 20 772 93 050 25 83 922 072 30 856 97 082 35 864 98 39 38 90 0 63 40 00 2 279 43 0 20 394 cooling suction pressure and temp curves suction pressure (Kpa) 5 Domestic air conditioner
Performance and curves diagrams.5 Heating capacity-temperature curves performance curves heating capacity and indoor/outdoor temp.table outdoor temp. DB/WB 0 indoor temp.(humidity 46%) 20 27-5 934 802 79-0 2972 278 2507-7/-8 3653 332 3078 2/ 3905 3446 325 7/6 3800 350 323 2/ 3402 334 2732 8/6 2783 2624 230 24/20 2233 2007 790 heating capacity and indoor/outdoor temp.curves heating capacity(w) 52 Domestic air conditioner
.6 Heating power consumption value- temperature curves Performance and curves diagrams performance curves power consumption value-temp.table outdoor temp. DB/WB 0 indoor temp.(humidity 46%) 20 27-5 839 883 936-0 005 046 099-7/-8 049 6 72 2/ 089 47 204 7/6 009 05 04 2/ 74 768 845 8/6 53 589 648 24/20 375 46 458 power consumption and indoor/outdoor temp.curves 400 power consumption (w) 200 000 800 600 400 200 0 20 27 0-5 -0-7/-8 2/ 7/6 2/ 8/6 24/20 outdoor temp.(db/wb) 53 Domestic air conditioner
Performance and curves diagrams.7 Heating discharge pressure curves performance curves heating discharge pressure.table outdoor temp indoor temp. DB/WB 0 20 27-5 2604 2764 2847-0 2830 2980 32-7/-8 3257 34 3553 2/ 3398 3698 3869 7/6 3457 3590 374 2/ 3336 3482 3653 8/6 356 3273 3402 24/20 2603 2782 285 heating discharge pressure and temp. curves 4000 discharge pressure (Kpa) 3500 3000 2500 2000 500 0 20 27 000-5 -0-7/-8 2/ 7/6 2/ 8/6 24/20 outdoor temp.(db/wb) 54 Domestic air conditioner
Performance and curves diagrams.8 Heating suction pressure curves performance curves heating suction pressure.table outdoor temp indoor temp. DB/WB 0 20 27-5 345 385 405-0 398 428 447-7/-8 492 532 55 2/ 6 65 670 7/6 744 784 803 2/ 844 884 904 8/6 0 05 07 24/20 97 237 257 heating suction pressure and temp. curves suction pressure (Kpa) 400 300 200 00 000 900 800 700 600 500 400 300 200 00 0-5 -0-7/-8 2/ 7/6 2/ 8/6 24/20 outdoor temp.(db/wb) 0 20 27 55 Domestic air conditioner
56 Do C omestic air ircuit Diagra conditioner ams r FUSE T25A/250VAC RV S4K385E2K(620V) L (8mH-2A) L2 (8mH-2A) SA RA-362M-V7-Y(CE)/EM3600X CX4 03-275VAC ST COM +2V +2V D C B A +2V LED +5V +5V 30V 0V 5V ZD2 N5240B/N4740A (0V//2W/W) ZD3 N523B(5.V-/2W) E 47uF-25V-05 +5V +5V MODE RST 5V GND +5V CS HW TC 5V COM GND ERROR +5V FLASH A( ) TEST/SS FUCTION TEST SW TEST +5V R9 0 +5V 5V XQ 2 CN48 2 CN49 +5V +5V +5V +5V +5V DRM DRM2 DRM3 GND -34-DRM -55-DRM2-56-DRM3 +5V FUSE2 TA/250VAC L N HEAT HEAT2 RV2 S4K385E2K(620V) RV3 S4K385E2K(620V) HEAT-EN COOL-EN TEST-EN 2. 0603 0805. 0603 0805 ±5 3. 85 /05 RV4 S4K385E2K(620V) PTC 400N COMA COMM AC-N AC-L 2-38-RXD 2-4-TXD -20-SW -9-SW2 +5V 50V ±20% C43 4.7uF-25V-206 C44 4.7uF-25V-206 C45 4.7uF-25V-206 C50 4.7uF-25V-206 N D250 CN2 D250 CN D250 CN3 M-/4W R 2.2uF/275V CX M-/4W R2 2.2uF/275V CX2 2.2uF/275V CX3 D250 CN7 D250 CN6 D250 CN0 D250 CN9 3 4 2 G4A-A-E-CN K6 3 5 4 2 892-CC-C K5 3 4 2 OJE-SS-2DM K4 3 4 2 OJE-SS-2DM K8 3 4 2 OJE-SS-2DM K7 00 -W R7 2 CN B2P3-VH( - ) 00nF C33 00nF C34 00nF C35 0K R7 0K R6 0K R5 K R8 K R9 K R20 RLS448 D5 RLS448 D4 RLS448 D3 2 3 4 5 CN50 B5B-XH-A( - ) VREF 6 AN8/P0 49 AN7/P00 50 AN6/P0 5 AN5/P02 52 AN4/P03 53 AN3/P04 54 P62 55 P6 56 CLK/AN2/P05 57 DA0/AN/P06 58 VSS/AVSS 59 DA/AN0/P07 60 VCC/AVCC 62 SSO/P37 63 SSCK/SCL/P35 64 P33/SSI P34/SDA/SCS 2 MODE 3 P43/XCIN 4 P44/COUT 5 RESET 6 P47/XOUT 7 VSS/AVSS 8 P46/XIN 9 VCC/AVCC 0 P54/TCIOD P53/TCIOC 2 P52/TCIOB 3 P5/TCIOA/TCTRG 4 P50/TCCLK 5 P27/TDIOD 6 (INT2)/P32 45 P5/RXD0/(TRIO)/(INT) 26 P4/TXD0 27 P86 28 P85/TFO2 29 P84/TFO 30 P83/TFO0 3 P82/TFO02 32 TFO0/P8 33 TFO00/P80 34 TEO/P60 35 INT0/P45 36 TXD/INT2/P66 37 RXD/INT3/P67 38 (CLK)/CLK2/P65 39 RXD2/P64 40 TXD2/P63 4 TBO/P3 42 TAO/P30 43 KI3/AN/P3 46 KI2/AN0/P2 47 P26/TDIOC 7 P25/TDIOB 8 P24/TDIOA 9 P23/TDIOD0 20 P7/TAIO/INT 24 P6/CLK0 25 KI/AN9/P 48 P20/TDIOA0/TDCLK 23 P2/TDIOB0 22 (INT)/P36 44 P22/TDIOC0 2 IC7 R5F22A8SNFA 00nF C8 4K7 0K DTC43X N7 4K7 0K DTC43X N6 2 3 4 NDI-02H BM 0K±%R58 0K±%R59 K R38 K R39 20K±% R67 20K±% R65 47K±% R63 K R68 K R66 K R64 00nF C26 00nF C25 00nF C24 K R88 0K R40 0K R4 2 3 4 5 6 CN7 0K R89 2 CN45 2 3 4 CN33 00nF C6 0K R37 2 3 4 CN35 2 CN47 20K±% R94 K R95 00nF C32 nf C3 nf C9 nf C20 0K R99 2K R98 0K R97 2K R35 2SA037AK P2 00nF C2 2 3 4 TJC8-04 JP3 3 2 CSTLS4M00G56 XT 560 R62 0K R6 0K R60 00nF C2 A0 A 2 A2 3 GND 4 SDA 5 SCL 6 WP 7 VCC 8 M24C08 IC4 2K R36 0K R3 0K R32 0K R33 0K R34 K R57 K R56 K R55 K R50 K R44 K R45 5.K±% R77 330 R78 0K R79 K R80 K R85 K R84 PC87A IC5 PC87A IC6 330 R83 K R82 330 -W R8 2.2K R8 0nF C3 2 3 4 5 6 CN22 K R46 nf C nf C0 4.7K±% R28 0K R87 0K R29 K R30 00nF C22 B 2B 2 3B 3 4B 4 5B 5 6B 6 7B 7 E 8 COM 9 7C 0 6C 5C 2 4C 3 3C 4 2C 5 C 6 ULN2003A IC7 2 3 4 5 6 CN5 2 3 CN24 2 3 4 5 CN34 2 CN44 +30V -30V +5V 0nF/630V C30 00nF C4 RLS448 D8 RLS448 D7 2SA037AK P -20-SW -9-SW2-34-DRM -55-DRM2-56-DRM3 2SD78KT46R N LED3 R20 220K-2W 2 2 2.2nF/250V CY6 2 2 2.2nF/250V CY5 2 2 0nF/250V CY4 2 2 0nF/250V CY3 2 2 4.7nF/250V CY2 2 2 4.7nF/250V CY N4007(A-000V) D6 INPUT GND 2 OUTPUT 3 IC4 L7805CV E8 00uF-6V C3 02-00V ZD N5948B(9V-3W) E6 00uF-6V E9 22uF-25V-05 C2 02-00V +5V +2V +5V R0 00K-2W 9 0 +5VD T G-TRAS-2-00/5/2/5-T357J-PC40-BCK2235 7 6 4 5 CY 472-KV 3 D5 ER06 M IRFUC20 ( ) CY4 222-250Vac/275Vac CY5 222-250Vac/275Vac 5.K±% R9 0K R8 K R22 5 R20 0K-206 R2 0nF C4 2 -W R9 47 -/4W R5 MBR300 D8 470uF-25V-05 E7 00nF C8 K-/2W R6 MBR00 D7 470uF-25V-05 E5 47 R23 20uH/2A DM20HR L3 47 -/4W R MUR30\ER06 D6 470uF-25V-05 E4 00nF C6 PC87A IC2 K R26 K R25 00nF C9 00nF C7 5.K±% R24 220 -/4W R3 220 -/4W R4 2 3 CN23 B3B-XH-A-E( - ) 330 -W R2 00nF C5 5.K±% R27 2 3 REF K A TL43C IC3 TVS PTVS5VOSUR(5V-400W- ) +30V -30V 0nF/630V C300 Adj FB 2 CS 3 GND 4 Drv 5 Vcc 6 HV 8 NC 7 NCP200P00 IC 2. Circuit diagrams 2. Outdoor unit control board circuit diagrams
Circuit Diagrams 2.2 Module board circuit diagram 57 Domestic air conditioner
Circuitdiagrams Sincere Forever Haier Group Haier Industrial Park, No., Haier Road 2660, Qingdao, China_ Http //www.haier.com Edited by : Signed by : Approved by: Jing Yanqin Yang Xiaodong Yang Wenjun Wu Hongjin Domestic air conditioner
REMOVAL PROCEDURE Wall Mounted Type DC Inverter FREE MATCH T-Series SERIES:35 STEEL SHELL 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 205 (Qingdao Haier Air Conditioner General corp., Ltd) All rights reserved. Unauthorized copying and distribution is a violation of law Haier Group Version V Date 205--5