Haier 1U24SE3ERA Service Manual
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Haier 1U24SE3ERA Service Manual

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SERVICE MANUAL L
Type
Packaged
DC Inverter
Model No.
1U24SE3ERA
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 2017-02-22

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Summary of Contents for Haier 1U24SE3ERA

  • 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; 220~240V50HZ/1ph DC inverter Heat pump & R410A refrigerant Version number Europe Platform of outdoor units: S (S 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 30715 Power Consumption(Rated) 1921 Annual energy consumption ³ 4.25*10 ³ TECHNICAL SPECIFICATIONS-UNIT Dimensions H*W*D 762×920×385 Packaged H*W*D 843×1085×487 Dimensions Sound level B(A) ELECTRICAL SPECIFICATIONS n i l...

  • Page 10: Sensors List

    Specification TECHNICAL SPECIFICATIONS-OTHERS Refrigerant type R410a Refrigerant charge 1.95 Refrigerant Maximum allowable distance circuit between indoor an outdoor Maximum allowable level difference Electrical expansion valve Refrigerant control liquid 6.35 Piping connections 12.7 (external diameter) drain Heat insulation type Both liquid and Gas pipes Max.

  • Page 11: Piping Diagrams

    Pinping diagrams 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: Printed Circuit Board Connector Wiring Diagram

    Wiring diagrams 6. Printed Circuit Board Connector Wiring Diagram Connectors PCB (1) (Outdoor Control PCB) Series Connect with load connector Connector for power N and L Connector for ground CN23 Connector for DC POWER 15V and 5V to the module board Connector for CN2, CN1 on the module board CN10 CN22...
  • Page 14 Connector Wiring diagrams PCB (1) CN28 CN25 CN24 CN23 CN22 CN19 CN18 CN17 CN47 CN15 CN10 CN7 CN6 Domestic air conditioner...
  • Page 15 Connector Wiring Diagram PCB (2) CN1 CN2 CN10 CN11 Domestic air conditioner...
  • Page 16 Functions and control Wiring diagrams OUTDOOR UNIT WIRING DIAGRAM 0010534175A COMPRESSOR CN28 BR(OR B) C(W) AC-L R(U) S(V) CN25 BL(OR W) AC-N FUSE1 CN24 T25A 250VAC CN36 CN11 MODULE COM OUTDOOR PCB COMB COMA CN6 CN7 CN8 CN9 BL(OR W) CN23 CN10 AC-L OUT...

  • 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 7.1.1.2 The starting of compressor When the compressor is started for the first time, it must be kept under the conditions of 58Hz,88Hz for...
  • Page 18 Functions and control < Max_hz3 90 HZ Wh_c 40 < Max_hz5 60 HZ Wh_c 48 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 29 5 Tao <22 10 < Tao <16 Tao 16 Tao <10 After the compressor is started for 3 seconds, the outdoor fan is controlled the airflow speed...
  • 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 Remarks: the outdoor unit 7.1.5.3 The control of preventing the overcurrent of the compressor During the starting process of the compressor, if the current of the compressor is greater than 15A 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.
  • Page 22 Functions and control When Tpg_indoor begins to rise again, and ice_temp_2 Tpg_indoor ice_temp_3 , the frequency of thecompressor doesn’t change. When ice_temp_3 Tpg_indoor ice_temp_4 , the frequency of the compressor increases at the speed of 1HZ/10seconds. 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.
  • Page 23 Functions and control Frost-removing temperature sensor failure Ambient temperature sensor failure Exhaust temperature sensor failure Communication fault between indoor and outdoor units deviate from the normal for the compressor ---- Loop of the station detect error High work-intense protection Overcurrent of the compressor Overcurrent protection for single-phase of the compressor ---- The socket protect...
  • Page 24 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 25 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 26 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 27 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 28 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 29 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 30 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 31 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 32: Dimensional Drawings

    Dimensinal drawings 8.Dimensional drawings-1U24SE3ERA unit:mm 1018 12.7 9.Center of gravity unit:mm Domestic air conditioner...

  • Page 33: Service Diagnosis

    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.
  • Page 34 Service diagnosis 10.Service Diagnosis 10.2 Problem Symptoms and Measures Check the power supply. Check to make sure that the rated voltage is supplied. None of the units operates Check the indoor PCB Check to make sure that the indoor PCB is broken Operation A power failure of 2 to 10 cycles can stop air conditioner Check the power supply.
  • Page 35 Connector Wiring Diagram Indoor Malfunction Heat-exchange sensor failure Page34 Indoor fan motor malfunction Page35 Outdoor Overcurrent protection of AC electricity Page36 Malfunction for the outdoor model Communication fault between the IPM and Page39 outdoor PCB Power voltage is too high or low Page40 Overheat protection for Discharge Page41...
  • Page 36 Seivice diagnosis Check the connector connection. Correct the connection Is it normal? Thermistor resistance check Replace the thermistor Is it normal? 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.
  • Page 37 Seivice diagnosis 10.3.4 Outdoor DC fan motor fault Outdoor display LED1 flash 9 times Method of DC fan motor is detected by checking the fan running condition and so on Supposed DC fan motor protection dues to the DC fan motor faulty Causes DC fan motor protection dues to faulty PCB Troubleshooting...
  • Page 38 Seivice diagnosis 10.3.5 IPM protection Outdoor display LED1 flash 2 times Method of IPM protection is detected by checking the compressor running condition and so on Malfunction Detection 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...
  • Page 39 Seivice diagnosis 10.3.6 Over-current of the compressor Outdoor Display LED1 flash 3 or 24 or 25 times Method of The current of the compressor is too high Malfunction Detection Malfunction when the IPM Module is damaged Decision or the compressor is damaged. Conditions power supply voltage is too low or too high Supposed...
  • Page 40 Seivice diagnosis 10.3.7 The communication fault between IPM and outdoor PCB Outdoor display: LED1 flash 4 times Method of Communication is detected by checking the IPM module and the outdoor PCB Malfunction Detection Malfunction The outdoor PCB broken leads to communication fault Decision The IPM module broken leads to communication fault Conditions...
  • Page 41 Seivice diagnosis 10.3.8 Power Supply Over or under voltage fault Outdoor display: LED1 flash 6 times The power supply is over voltage Method of An abnormal voltage rise or fall is detected by checking the specified voltage detection circuit. Malfunction Detection Malfunction An voltage signal is fed from the voltage detection circuit to the microcomputer...
  • Page 42 Seivice diagnosis 10.3.9 Overheat Protection For Discharge Temperature Outdoor display: LED1 flash 8 times Method of The Discharge temperature control is checked with the temperature being detected Malfunction by the Discharge pipe thermistor Detection Malfunction when the compressor discharge temperature is above 110 Decision Conditions Supposed...
  • Page 43 Seivice diagnosis 10.3.10 The communication fault between indoor and outdoor Indoor display Outdoor display LED1 flash 15 times Method of Communication is detected by checking the indoor PCB and the outdoor PCB Malfunction Detection Malfunction The outdoor PCB broken leads to communication fault Decision The indoor PCB broken leads to communication fault Conditions...
  • Page 44 Seivice diagnosis 10.3.11 Loss of synchronism detection Inverter side current detection is abnormal Outdoor Display LED1 flash 18 times LED1 flash 19 times Method of The position of the compressor rotor can not detected normally Malfunction Detection Malfunction when the wiring of compressor is wrong or the connection is poor; Decision or the compressor is damaged Conditions...
  • Page 45 Seivice diagnosis 10.3.12 High work-intense protection Outdoor display LED1 flash 21 times Method of High work-intense control is activated in the heating mode if the temperature Malfunction being sensed by the heat exchanger thermistor exceeds the limit. Detection Malfunction Activated when the temperature being sensed by the heat exchanger Decision rises above 63 twice in 30 minutes.

  • Page 46: Performance And Cerves Diagrams

    Capacity 11 Perforance and curves diagrams 11.1 Cooling capacity temperature curves AP24DF1HRA 1U24SE3ERA 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...
  • Page 47 Capacity 11.2 Power consumption temperature curves AP24DF1HRA 1U24SE3ERA performance curves power consumption value-temp.table indoor temp. DB/WB 18/12 1692 1696 1704 1658 1342 1703 2046 2435 2599 21/15 1721 1729 1703 1652 1369 1768 2110 2477 2697 1884 1899 1842 1832...
  • Page 48 11.3 Heating capacity temperature curves AP24DF1HRA 1U24SE3ERA performance curves heating capacity and indoor/outdoor temp.table indoor temp.(humidity 46%) outdoor temp. DB/WB 3555 3225 3160 3950 3600 3555 4266 3975 3792 6556 5995 5530 -7/-8 8057 7305 6789 8886 8024 7276...
  • Page 49 Capacity 11.4 P ower consumption value -temperature curves AP24DF1HRA 1U24SE3ERA performance curves power consumption value-temp.table outdoor temp. indoor temp.(humidity 46%) DB/WB 2012 2236 2459 2246 2496 2745 2480 2756 3031 2720 3023 3325 -7/-8 2941 3268 3594 2861 3179 3497...
  • Page 50 11.5 Cooling discharge pressure curves AP24DF1HRA 1U24SE3ERA 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...
  • Page 51 Capacity 11.6 Cooling suction pressure curves AP24DF1HRA 1U24SE3ERA performance curves cooling suction pressure.table outdoor temp. indoor temp. (humidity 46%) DB/WB 21/15 27/19 32/23 1088 1069 1251 COOLING SUCTION PRESSURE 1350 1250 21/15 1150 1050 27/19 32/23 Outdoor Temp. Domestic air conditioner...
  • Page 52 Capacity 11.7 Heating discharge pressure curves AP24DF1HRA 1U24SE3ERA 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...
  • Page 53 Capacity 11.8 Heating suction pressure curves AP24DF1HRA 1U24SE3ERA performance curves heating discharge pressure.table indoor temp. outdoor 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 54: Circuit Diagrams

    Circuit diagrams 12 Circuit diagrams 12.1 Outdoor unit control board 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...

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