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Haier 1U71REAFRA Service Manual
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Haier 1U71REAFRA Service Manual

Haier 1U71REAFRA Service Manual

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SERVICE MANUAL L
Packaged
Type
DC Inverter
Model No. 1U71REAFRA
1U24REAFRA
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
2017 (Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. Unauthorized copying and distribution is a violation of law
Haier Group
Version V1
Date 2019-4-10

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  • Page 1 Repair the product or products dealt with in this service information by anyone else could result in serious injury or death 2017 (Qingdao Haier Air Conditioner General corp. , Ltd) All rights reserved. Unauthorized copying and distribution is a violation of law...

  • Page 2: Table Of Contents

    Contents Contents 1. Introduction ....................1 2. Specifications..................7 3. Sensors list ....................8 4. Piping diagrams ..................9 5. Operation range ..................10 6. Printed Circuit Board Connector Wiring Diagram .........11 7. Functions and Control................8. Dimensional drawings................9. Conter of gravity ................... 10. Service Diagnosis .................33 ......

  • Page 3: Introduction

    Introduction 1 Introduction 1.1 Model name explanation Apply toT1; 230V50HZ/1ph DC inverter Heat pump & R32 refrigerant Version number EU(European Union) Platform of outdoor units: 2P (2P platform) Nominal cooling capacity (24000Btu/h) Type of outdoor unit : U (normal type) The maximum combination number Domestic air conditioner...
  • Page 4 Introduction 1.2 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.
  • Page 5 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.
  • Page 6 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.
  • Page 7 Introduction 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.
  • Page 8 Introduction 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.

  • Page 9: Specifications

    Specification 2 Specifications NOMINAL DISTRIBUTION SYSTEM VOLTAGE NOMINAL CAPACITY and NOMINAL INPUT n i l Capacity rated Btu/h 24572 30710 Power Consumption(Rated) 2.23 2.43 4.0/A+ 7.0/A++ 1925 Annual energy consumption ³ 1.2*10 ³ TECHNICAL SPECIFICATIONS-UNIT Dimensions H*W*D 697×890×353 Packaged H*W*D 780×1046×460 Dimensions Net Weight...

  • Page 10: Sensors List

    Specification TECHNICAL SPECIFICATIONS-OTHERS Refrigerant type Refrigerant charge Refrigerant Maximum allowable distance circuit between indoor an outdoor Maximum allowable level difference Electrical expansion valve Refrigerant control liquid Piping connections (external diameter) drain Heat insulation type Both liquid and Gas pipes Max. piping Length Max.

  • Page 11: Piping Diagrams

    Pinping diagrams 4．Pinping diagrams electrical expansion valve electrical expansion valve Domestic air conditioner...

  • Page 12: Operation Range

    Operation range 5 Operation range Domestic air conditioner...
  • Page 13 Connector Wiring diagrams 6.PCB Diagram Connectors PCB (1) (Outdoor Control PCB) 1) CN1, CN2 Connectors for power N and L 2) CN3 Connector for ground 3) CN22,CN23 Connectors to the module board CN10,CN11 4) CN9, CN8 Connectors for CN1,CN2 on the module board 5) CN10 Connector for four way valve coil 6) CN18,CN20 Connectors for thermistors 7) CN26, CN24 Connectors to P and N of the module board...
  • Page 14 Connector Wiring diagrams PCB (1) CN10 CN16 CN20 CN18 CN23 CN21 CN22 CN26 CN24 Domestic air conditioner...
  • Page 15 Connector Wiring Diagram PCB (2) CN10 CN11 Domestic air conditioner...
  • Page 16 Connector Wiring diagrams Wiring diagrams Domestic air conditioner...

  • Page 17: Functions And Control

    Functions and control 7. Functions and Control 7.1 Main functions and control specification 7.1.1 The operation frequency of outdoor unit and its control 7.1.1.1 The operation frequency control of compressor The operation frequency scope of compressor Mode Minimun operation frequency Maximun operation frequency 17Hz 17Hz...
  • Page 18 Functions and control < ≥ Max_hz3 90 HZ Wh_c < ≥ Max_hz5 60 HZ Wh_c 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 actural running system ability*the maximum frequency which is limited by the temperature and under the...
  • Page 19 Functions and control During the compressor is started for 3 seconds, the outdoor fan is controlled the airflow speed according to the temperature conditions of the outdoor environment. 22℃5< Tao <29℃5 Tao（℃） Tao <22℃ Tao≥29℃5 10℃< Tao <16℃ Tao（℃） Tao <10℃ Tao≥16℃...
  • Page 20 Functions and control 7.1.5 ：Protection function 7.1.5.1：TTC high temperature-preventing protection Once the machine is started, it can run TTC 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: 100 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...
  • Page 21 Functions and control 7.1.5.3：T he protection function of AC current: During the starting process of the compressor, if the AC current is greater than 12A, the frequency of the compressor decreases at the speed of 1HZ/second. During the starting process of the compressor, if the AC current is greater than 11A, the frequency of the compressor decreases at the speed of 0.1HZ/second.
  • Page 22 Functions and control 7.2 Value of Thermistor 7.2.1 Outdoor Unit Ambient Sensor, Defrosting Sensor, Pipe sensor R25℃=10KΩ±3% B25℃/50℃=3700K±3% Temp.(℃) Max.(KΩ) mal(K Ω Min.(KΩ) Tolerance(℃) 165.2170 147.9497 132.3678 -1.94 1.75 155.5754 139.5600 125.0806 -1.93 1.74 146.5609 131.7022 118.2434 -1.91 1.73 138.1285 124.3392 111.8256 -1.89...
  • Page 23 Functions and control 130.2371 117.4366 105.7989 -1.87 1.70 122.8484 110.9627 100.1367 -1.85 1.69 115.9272 104.8882 94.8149 -1.83 1.67 109.4410 99.1858 89.8106 -1.81 1.66 103.3598 93.8305 85.1031 -1.80 1.64 97.6556 88.7989 80.6728 -1.78 1.63 92.3028 84.0695 76.5017 -1.76 1.62 87.2775 79.6222 72.5729 -1.74 1.60...
  • Page 24 Functions and control 13.3431 12.8572 12.3778 -0.88 0.87 12.7718 12.3223 11.8780 -0.86 0.85 12.2280 11.8126 11.4011 -0.83 0.83 11.7102 11.3267 10.9459 -0.81 0.80 11.2172 10.8634 10.5114 -0.78 0.78 10.7475 10.4216 10.0964 -0.75 0.75 10.3000 10.0000 9.7000 -0.75 0.75 9.8975 9.5974 9.2980 -0.76 0.76...
  • Page 25 Functions and control 2.5396 2.3611 2.1932 -2.31 2.17 2.4591 2.2840 2.1195 -2.36 2.21 2.3815 2.2098 2.0486 -2.40 2.25 2.3068 2.1383 1.9803 -2.45 2.29 2.2347 2.0695 1.9147 -2.49 2.34 2.1652 2.0032 1.8516 -2.54 2.38 2.0983 1.9393 1.7908 -2.59 2.42 2.0337 1.8778 1.7324 -2.63 2.46...
  • Page 26 Functions and control 0.6877 0.6140 0.5478 -4.63 4.16 0.6700 0.5977 0.5328 -4.69 4.21 0.6528 0.5820 0.5183 -4.74 4.26 0.6361 0.5667 0.5043 -4.80 4.31 0.6200 0.5518 0.4907 -4.86 4.36 0.6043 0.5374 0.4775 -4.92 4.41 0.5891 0.5235 0.4648 -4.98 4.45 0.5743 0.5100 0.4524 -5.04 4.50...
  • Page 27 Functions and control 2434.5487 2112.5459 1831.4826 -2.56 2.24 2296.6230 1996.2509 1733.6024 -2.55 2.23 2167.2730 1887.0018 1641.4966 -2.53 2.22 2045.9191 1784.3336 1554.7931 -2.52 2.21 1932.0242 1687.8144 1473.1460 -2.50 2.20 1825.0899 1597.0431 1396.2333 -2.48 2.19 1724.6540 1511.6468 1323.7551 -2.47 2.17 1630.2870 1431.2787 1255.4324 -2.45 2.16...
  • Page 28 Functions and control 239.0983 221.9825 205.9065 -1.71 1.61 228.4809 212.4060 197.2844 -1.69 1.59 218.3860 203.2887 189.0648 -1.67 1.57 208.7855 194.6066 181.2273 -1.65 1.55 199.6531 186.3369 173.7524 -1.63 1.54 190.9639 178.4584 166.6217 -1.60 1.52 182.6945 170.9508 159.8181 -1.58 1.50 174.8228 163.7951 153.3249 -1.56 1.48...
  • Page 29 Functions and control 38.9643 37.5045 36.0668 -1.11 1.09 37.6569 36.2078 34.7831 -1.14 1.13 36.3996 34.9622 33.5513 -1.18 1.16 35.1903 33.7653 32.3689 -1.22 1.19 34.0269 32.6151 31.2338 -1.26 1.23 32.9075 31.5096 30.1438 -1.30 1.27 31.8302 30.4467 29.0970 -1.33 1.30 30.7933 29.4246 28.0915 -1.37 1.34...
  • Page 30 Functions and control 9.7563 8.9971 8.2895 -3.00 2.80 9.4901 8.7441 8.0495 -3.05 2.84 9.2322 8.4993 7.8175 -3.09 2.88 8.9824 8.2623 7.5931 -3.14 2.92 8.7404 8.0329 7.3760 -3.19 2.96 8.5059 7.8108 7.1660 -3.24 3.00 8.2787 7.5958 6.9629 -3.29 3.04 8.0584 7.3875 6.7664 -3.33 3.09...

  • Page 31: Dimensional Drawings

    Dimensinal drawings 8. 8.Dimensional drawin unit:mm 9.Center of gravity unit:mm Domestic air conditioner...

  • Page 32: Service Diagnosis

    Service diagnosis .Service Diagnosis 10.1.1 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.
  • Page 33 Service diagnosis 1 .3 Error Codes and Description indoor display Code indication fault description Outdoor (LED1 Display Code flash times) Indoor Communication fault between Outdoor indoor and outdoor units Room temperature sensor failure Indoor Heat-exchange sensor failure Malfunction Indoor EEPROM error Indoor fan motor malfunction Outdoor EEPROM error...
  • Page 34 Service diagnosis 1 .3.1 Thermistor or Related Abnormality E1: Room temperature sensor failure Indoor display E2: Indoor pipe sensor failure outdoor display 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 Domestic air conditioner...
  • Page 35 Service diagnosis 10.3.2 The communitcation falu Method of malfunction detection Malfunction detection conditions Supposed causes Troubleshooting Domestic air conditioner...
  • Page 36 Service diagnosis Check the indoor mainboard. Measure the voltage between Jumpers 3 and 4 of IC1 on the indoor mainboard with a multimeter. Test the outdoor power supply (230VAC and +310VDC) with a multimeter. If the voltage is of a constant value of 0V DCto5V DC If 230VAC is available but 310DC not, the power module is damaged, replace it...
  • Page 37 Service diagnosis .3.3 EEPROM abnormal Indoor Display E4: indoor EEPROM error Outdoor display F12: Outdoor EEPROM error; Outdoor LED1 flash 1 times 10.3.4 Indoor AC fan motor malfunction Indoor display E14 This is caused by indoor motor or indoor PCB fault Domestic air conditioner...
  • Page 38 10.3.5 Outdoor DC fan motor fault Outdoor display F8 LED1 flash 9 times...
  • Page 39 10.3.6 IPM protection Outdoor display F1 LED1 flash 2 times; F22 LED1 flash 3 times Under this error, please ensure the refrigerating system pressure is normal, and no block, then replace power module...
  • Page 40 10.3.7 Over-current of the compressor Outdoor Display F2, F23 LED1 flash 24 or 25 times...
  • Page 41 10.3.8 The communication fault between IPM and outdoor Outdoor display: F3 LED1 flash 4 times...
  • Page 42 10.3.9 Power Supply Over or under voltage fault Outdoor display: F19 LED1 flash 6 times...
  • Page 43 10.3.10 Overheat Protection For Discharge Temperature Outdoor display: F4 LED1 flash 8 times...
  • Page 44 10.3.11 Compressor loss of synchronism detection Outdoor Display F11 LED1 flash 18 times 10.3.12 Compressor position detection circuit fault Outdoor Display F28 LED1 flash 19 times...

  • Page 45: Performance And Cerves Diagrams

    Capacity 11 Performance and curves diagrams 11.1 Cooling capacity temperature curves performance curves cooling value-temerature table indoor temp. DB/WB 5244 5258 5281 5139 4877 5941 6463 6249 6190 5772 18/12 5506 5534 5451 5287 5064 6278 6881 6571 6419 6076 21/15 6217 6265...
  • Page 46 Capacity 11.2 Power consumption temperature curves performance curves power consumption value-temp.table indoor temp. DB/WB 0℃ 10℃ 20℃ 25℃ 30℃ 35℃ 40℃ 46℃ －15℃ －10℃ 1692 1696 1704 1658 1342 1703 2046 2435 2599 18/12℃ 21/15℃ 1721 1729 1703 1652 1369 1768 2110 2477...
  • Page 47 capacity 11.3 Heating capacity temperature curves performance curves heating capacity and indoor/outdoor temp.table indoor temp.(humidity 46%) outdoor temp. DB/WB -7/-8 12/11 18/16 24/20 heating capacity and indoor/outdoor temp.curves 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000 Domestic air conditioner...
  • Page 48 Capacity 11.4 Power consumption value -temperature curves performance curves power consumption value-temp.table indoor temp.(humidity 46%) outdoor temp. DB/WB -7/-8 12/11 18/16 24/20 heating capacity and indoor/outdoor temp.curves · 4000 3500 3000 2500 2000 1500 1000 -7/-8 12/11 18/16 24/20 outdoor tempe.(DB/WB) Domestic air conditioner...
  • Page 49 capacity 11.5 Cooling discharge pressure curves performance curves cooling discharge pressure.table outdoor temp. indoor temp. (humidity 46%) DB/WB 21/15 27/19 32/23 1811 1862 1971 1827 1913 1984 1876 1938 2016 1877 1964 2077 1981 2040 2172 2169 2270 2406 2366 2448 2560 2477...
  • Page 50 Capacity 11.6 Cooling suction pressure curves performance curves cooling suction pressure.table outdoor temp. indoor temp. (humidity 46%) DB/WB 21/15 27/19 32/23 1069 1251 COOLING SUCTION PRESSURE 1350 1250 21/15 1150 1050 27/19 32/23 Outdoor Temp. Domestic air conditioner...
  • Page 51 Capacity 11.7 Heating discharge pressure curves performance curves Heating discharge pressure.table indoor temp. outdoor temp DB/WB 2223 2345 2466 2326 2479 2604 2467 2580 2641 2600 2781 2845 2978 3183 3267 -7/-8 3317 3451 3639 3173 3350 3490 3098 3250 3404 12/11 18/16...
  • Page 52 Capacity 11.8 Heating suction pressure curves performance curves heating discharge pressure.table outdoor temp indoor temp. DB/WB -7/-8 12/11 1093 1119 1132 18/16 24/20 1279 1305 1318 HEATING SUCTION PRESSURE 1400 1300 1200 1100 1000 -10 -7/-8 7/6 12/11 18/16 24/20 Outdoor Temp.

  • Page 53: Circuit Diagrams

    Circuit diagrams 12 Circuit diagrams 12.1 Outdoor unit control board Circuit Diagrams Domestic air conditioner...
  • Page 54 Circuit diagrams Domestic air conditioner...
  • Page 55 Circuit diagrams Domestic air conditioner...
  • Page 56 Circuit diagrams 12.2 Module board Circuit Diagram Domestic air conditioner...
  • Page 57 Repair the product or products dealt with in this service information by anyone else could result in serious injury or death 2016 (Qingdao Haier Air Conditioner General corp. , Ltd) All rights reserved. Unauthorized copying and distribution is a violation of law Haier Group Version：V1 Date：2 019-4-10...
  • Page 58 1.Removal of Outdoor panel Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Loosen the screws and lift the top panel and remove the handle. Domestic air conditioner...
  • Page 59 Loosen the screws of the panel, pull and remove the front panel. Domestic air conditioner...
  • Page 60 Removal of procedure 2.Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Remove the fixing screws, Than lift the electrical box. Domestic air conditioner...
  • Page 61 Removal Procedure 3.Removal of Fan and Fan Motor Loosen the fixing screws. Remove the fan and motor. Domestic Air Conditioner...
  • Page 62 Removal Procedure 4.Removal of Fan Motor Bracket and Partition Loosen the fixing screws and lift the fan motor bracket. Remove the partition Domestic Air Conditioner...
  • Page 63 Removal Procedure 5.Removal of Compressor and Heat Exchanger Remove the valve plate. Remove the valves and the compressor. Loosen the screws and remove the heat exchanger. Domestic Air Conditioner...
  • Page 64 Circuit diagrams Sincere Forever Haier Group Edited by : Wang Xiaofei Haier Industrial Park, No.1, Haier Road 266101, Qingdao, China_ Signed by : Liu Chao Http：//www.haier.com Wang Mingqiang Approved by: Domestic air conditioner...

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