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Haier 1U24RE8ERA Service Manual

Wall mounted type dc inverter
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SERVICE MANUAL
Wall Mounted Type
DC Inverter
Model No.
1U24RE8ERA
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
2015 (Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. Unauthorized copying and distribution is a violation of law
Haier Group
Version V1
Date 2015-12-05

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Summary of Contents for Haier 1U24RE8ERA

  • Page 1 Repair the product or products dealt with in this service information by anyone else could result in serious injury or death 2015 (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. Center of gravity ................... 10. Service diagnosis ................11.

  • 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: 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 1.2.3 Inspection after Repair Warning Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet all the way. If the plug has dust or loose connection, it can cause an electrical shock or fire. If the power cable and lead wires have scratches or deteriorated, be sure to replace them.
  • Page 8 Introduction 1.2.5 Using Icons List Icon Type of Information Description A “note” provides information that is not indispensable, but may Note Note 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 Caution Caution...

  • Page 9: Specifications

    Specification 2 .Specifications NOMINAL DISTRIBUTION SYSTEM VOLTAGE NOMINAL CAPACITY and NOMINAL INPUT cooling heating 7.4 （2.4-8.7) 6.6（2.0-8.1) Capacity rated 25250(8190-29690) Btu/h 22520(6820-27640) Power Consumption(Rated) 2.19 2.05 . 3.9 2011 ³ 2.8*10 ³ TECHNICAL SPECIFICATIONS-UNIT Dimensions H*W*D 890×353x697 Packaged 1046x460x780 H*W*D Dimensions dB(A) Sound level...

  • Page 10: Sensors List

    Specification TECHNICAL SPECIFICATIONS-OTHERS Refrigerant type R410a Refrigerant charge 1.45 Refrigerant Maximum allowable distance circuit between indoor an outdoor Maximum allowable level difference Refrigerant control Capillary 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 4 Piping diagrams Domestic air conditioner...

  • Page 12: Operation Range

    Operation range 5 Operation range Domestic air conditioner...

  • Page 13: Printed Circuit Board Connector Wiring Diagram

    10) CX2 Connector for communicate and power N between indoor and outdoor unit 11) CN15 Connector for electric expansion valves PCB (2) (Module PCB) For 1U24RE8ERA CN10 Connector for the DC power 5V and 15V form the control PCB CN11 Connector for communicate between the control board and the module board...
  • Page 14 Printed circuit board connector wiring diagrams PCB (1) CN28 CN25 CN24 CN23 CN22 CN19 CN18 CN17 CN47 CN15 CN11 CN10 Domestic air conditioner...
  • Page 15 Printed circuit board connector wiring diagram PCB(2) CN10 CN11 Domestic air conditioner...
  • Page 16 Printed circuit board connector wiring diagram Outdoor unit wiring diagram 0010534175 OUTDOOR UNIT WIRING DIAGRAM COMPRESSOR CN28 BL(OR W) R(U) C(W) AC-N S(V) CN25 BR(OR B) AC-L FUSE1 T25A 250VAC CN24 CN36 CN11 M ODULE COM COM B OUTDOOR PCB COM A CN6 CN7 CN8 CN9...

  • 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 Heating 36Hz...
  • Page 18 Functions and control Refrigeration/dehumidification mode: Serial No. Temperature scope Frequency limitation Wh_c<28 Max_hz1 46HZ Wh_c<32 Max_hz2 72HZ Wh_c<40 Max_hz3 80HZ Wh_c<48 Max_hz4 65HZ Wh_c>=48 Max_hz5 50HZ 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.
  • Page 19 Functions and control 7.1.2 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 15 seconds).
  • Page 20 Functions and control 7.1.4 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.
  • Page 21 Functions and control TC( ) The compressor stops Fgh_t1 65 Fgh_t1 2 Fgh_t2 2 N Decreasing the frequency rapidly Fgh_t2 59 P Decreasing the frequency slowly Fgh_t3 Fgh_t3 2 Fgh_t4—2 Q Prohibiting increasing the frequency Fgh_t4 R Increasing slowly Fgh_t5 Fgh_t5—2 Normal N Decreasing at the speed of 1HZ/1 second...
  • Page 22 Functions and control decreases by 1A. (2) When the outdoor environment temperature is higher than 50 , AC current protection value decreases by 2.5A. 7.1.5.5 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).
  • Page 23 Functions and control the compressor. When the temperatures are lower than 60 , relieve the defrosting temperature protection. 7.2 Value of Thermistor Ambient Sensor, Defrosting Sensor, Pipe sensor R25 =10K 3% B25 /50 =3700K 3% Temp.( ) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) 165.2170...
  • Page 24 Functions and control 24.1432 22.8656 21.6361 -1.20 1.16 23.0284 21.8398 20.6939 -1.18 1.14 21.9714 20.8659 19.7982 -1.15 1.12 20.9688 19.9409 18.9463 -1.13 1.09 20.0176 19.0621 18.1358 -1.11 1.07 19.1149 18.2270 17.3646 -1.08 1.05 18.2580 17.4331 16.6305 -1.06 1.03 17.4442 16.6782 15.9315 -1.03 1.01...
  • Page 25 Functions and control 4.0588 3.8287 3.6084 -1.70 1.62 3.9206 3.6943 3.4780 -1.74 1.66 3.7878 3.5654 3.3531 -1.78 1.70 3.6601 3.4416 3.2332 -1.82 1.74 3.5374 3.3227 3.1183 -1.87 1.78 3.4195 3.2085 3.0079 -1.91 1.82 3.3060 3.0989 2.9021 -1.95 1.85 3.1969 2.9935 2.8005 -2.00 1.89...
  • Page 26 Functions and control 1.0314 0.9326 0.8424 -3.80 3.46 1.0030 0.9061 0.8179 -3.85 3.51 0.9756 0.8806 0.7941 -3.90 3.55 0.9490 0.8558 0.7711 -3.96 3.60 0.9232 0.8319 0.7489 -4.01 3.64 0.8983 0.8088 0.7275 -4.07 3.69 0.8741 0.7863 0.7067 -4.12 3.74 0.8507 0.7646 0.6867 -4.18 3.78...
  • Page 27 Functions and control 6953.2930 5851.9864 4920.6791 -2.82 2.38 6515.8375 5494.2064 4628.5894 -2.80 2.37 6108.5393 5160.4621 4355.6078 -2.79 2.37 5729.1413 4848.9963 4100.3708 -2.77 2.36 5375.5683 4558.1906 3861.6201 -2.76 2.35 5045.9114 4286.5535 3638.1938 -2.75 2.34 4738.4141 4032.7098 3429.0191 -2.73 2.34 4451.4586 3795.3910 3233.1039 -2.72 2.33...
  • Page 28 Functions and control 564.4275 511.0760 462.3510 -2.09 1.90 536.9865 486.9352 441.1516 -2.07 1.89 511.0105 464.0500 421.0258 -2.05 1.87 486.4151 442.3499 401.9146 -2.03 1.86 463.1208 421.7683 383.7626 -2.01 1.84 441.0535 402.2430 366.5175 -1.99 1.83 420.1431 383.7151 350.1301 -1.97 1.81 400.3242 366.1295 334.5542 -1.95 1.80...
  • Page 29 Functions and control 78.9116 75.6668 72.4902 -1.10 1.08 75.8343 72.8004 69.8249 -1.08 1.06 72.8916 70.0561 67.2703 -1.05 1.03 70.0770 67.4283 64.8213 -1.03 1.01 67.3844 64.9115 62.4731 -1.00 0.99 64.8080 62.5006 60.2211 -0.98 0.96 62.3423 60.1906 58.0609 -0.95 0.94 59.9821 57.9770 55.9885 -0.92 0.92...
  • Page 30 Functions and control 17.4214 16.3564 15.3427 -2.10 2.00 16.9023 15.8542 14.8577 -2.15 2.04 16.4010 15.3696 14.3902 -2.19 2.08 15.9167 14.9020 13.9394 -2.23 2.12 15.4489 14.4506 13.5047 -2.27 2.16 14.9968 14.0149 13.0855 -2.32 2.19 14.5599 13.5942 12.6811 -2.36 2.23 14.1376 13.1879 12.2909 -2.41 2.27...

  • Page 31: Dimensional Drawings

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

  • Page 32: 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.
  • Page 33 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 34 Service diagnosis 10.3 Error Codes and Description indoor display Code indication Indoor Reference Outdoor fault description displaying Page (LED1 flash panel code times) indication Indoor Communication fault between indoor and Page .44 Outdoor outdoor units Room temperature sensor failure Page 33. Indoor Malfunction Heat-exchange sensor failure Page 33.
  • Page 35 Service diagnosis 10.3.1 Thermistor or Related Abnormality Indoor Display E1: Room temperature sensor failure E2: Heat-exchange 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 Method of The temperatures detected by the thermistors are used to determine thermistor errors...
  • Page 36 Service diagnosis 10.3.2 EEPROM abnormal Indoor Display E4: Indoor EEPROM error Indoor display F12: Outdoor EEPROM error; Outdoor LED1 flash 1 times Method of The Data detected by the EEPROM are used to determine MCU Malfunction Detection Malfunction When the data of EEPROM is error or the EEPROM is damaged Decision Conditions Supposed...
  • Page 37 Service diagnosis 10.3.3 Indoor AC fan motor malfunction Indoor Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation Detection Malfunction when the detected rotation feedback signal don’t received in 2 minutes Decision Conditions Supposed...
  • Page 38 Service 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 Malfunction Detection Malfunction when the data of EEPROM is error or the EEPROM is damaged Decision Conditions Supposed...
  • Page 39 Service diagnosis Check whether Terminal on the outdoor mainboard is well inserted. Reinsert the terminals Is it normal? Electrify the machine again and turn it on in the Cool state with the remote controller. check whether motor can Measure the voltage between 1 and 3 of the terminal of fan motor on the mainboard about DC310V, Measure the voltage between 3 and 4 of the terminal about DC15V.
  • Page 40 Service 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 41 Service 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 42 Service diagnosis Electrify the machine again and turn it on with the remote controller, If malfunctions IPM Module is damaged and are reported before or upon the compressor needs replacing. being started up, The compressor is started normally, but malfunctions are reported after it has Repair the power supply run for some time.
  • Page 43 Service 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 44 Service 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 45 Service 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 46 Service 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.
  • Page 47 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 48 Service 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 49 Service 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 65 twices in 30 minutes.

  • Page 50: Performance And Curves Diagrams

    Performance and curves diagrams 11.Performence and curves diagrams 11.1 Cooling capacity-temperature curves performance curves cooling value-temerature table outdoor temp. indoor temp. DB/WB 5084 4945 4791 4552 5656 6116 5898 5836 5314 21/15 5210 5107 5019 4782 5917 6375 6384 6101 5734 24/16 5920...
  • Page 51 Performance and curves diagrams 11.2 Cooling power consumption value- temperature curves performance curves power consumption value-temp.table outdoor temp. indoor temp. DB/WB 1640 1595 1545 1016 1428 1809 2203 2597 2706 21/15 24/16 1628 1596 1569 1043 1477 1868 2354 2665 2845 1794 1738...
  • Page 52 Performance and curves diagrams 11.3 Cooling discharge pressure curves performance curves cooling discharge pressure.table outdoor temp. indoor temp. (humidity 46%) DB/WB 21/15 27/19 35/24 1923 1973 2037 1888 1999 2093 1922 2025 2099 1991 2104 2211 2190 2341 2481 2412 2499 2640 2533...
  • Page 53 Performance and curves diagrams 11.4 Cooling suction pressure curves performance curves cooling suction pressure.table outdoor temp. indoor temp. (humidity 46%) DB/WB 21/15 27/19 35/24 1085 1247 1074 1171 1360 cooling suction pressure and temp.curves 1550 1350 1150 outdoor temp.(DB/WB) Domestic air conditioner...
  • Page 54 Performance and curves diagrams 11.5 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 9000 8000 7000 6000 5000 4000 3000 2000 1000 outdoor temp.(DB/WB) Domestic air conditioner...
  • Page 55 Performance and curves diagrams 11.6 Heating 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 3000 2500 · 2000 · 1500 1000 -7/-8 12/11 18/16 24/20 outdoor temp.(DB/WB)
  • Page 56 Performance and curves diagrams 11.7 Heating discharge pressure curves performance curves heating discharge pressure.table outdoor temp indoor temp. DB/WB -7/-8 12/11 18/16 24/20 heating discharge pressure and temp. curves 4000 3500 3000 2500 2000 1500 1000 -7/-8 12/11 18/16 24/20 outdoor temp.(DB/WB) Domestic air conditioner...
  • Page 57 Performance and curves diagrams 11.8 Heating suction pressure curves performance curves heating suction pressure.table indoor temp. outdoor temp DB/WB -7/-8 12/11 1014 1053 1073 18/16 1200 1239 1259 24/20 heating suction pressure and temp. curves 1400 1300 1200 1100 1000 -7/-8 12/11 18/16 24/20 outdoor temp.(DB/WB)

  • Page 58: Circuit Diagrams

    Circuit diagrams 12 Circuit diagrams Outdoor unit control board display board 0011800161 display board 0010402241 CN32' CN32'' SWITCH RC K EEPROM SWITC H SRC K 0.1uF J TP1288LA ZJ/SS J P1 VC C SW1' 0.1uF J P3 CHECK/S_TIME TSVC-1 TEST DIGH CN48 MODE...
  • Page 59 Circuit diagrams Module board circuit diagram 5.2MH/15A D207 FFA30U60DN PS21964-AT/AST/PS219A4-ASTX C404 C405 C406 AC-L IRGP20B60PDPBF 104/275V 680U/400V*2 104/275V 474/630V R215 D25BX60B 0.015/5W 0.02/5W AC-N R214 R222,R225 R225 4.22K 9 10 11 12 13 14 15 16 17 D206 C023 R222 TLP251 C413 24V/1W...
  • Page 60 Circuit diagrams Sincere Forever Haier Group Edited by : Jing Yanqin Haier Industrial Park, No.1, Haier Road Yang Xiaodong 266101, Qingdao, China_ He S hiquan Signed by : Http //www.haier.com Approved by: Wu Hongjin Domestic air conditioner...
  • Page 61 Repair the product or products dealt with in this service information by anyone else could result in serious injury or death 2015 (Qingdao Haier Air Conditioner General corp. , Ltd) All rights reserved. Unauthorized copying and distribution is a violation of law...
  • Page 62 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 63 Loosen the screws of the panel, pull and remove the front panel. Domestic air conditioner...
  • Page 64 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 65 Removal Procedure 3.Removal of Fan and Fan Motor Loosen the fixing screws. Remove the fan and motor. Domestic Air Conditioner...
  • Page 66 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 67 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...

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