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Haier 1U25YEEFRA Manual
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Haier 1U25YEEFRA Manual

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SERVICE MANUAL
Outdoor Unit
Model No. 1U25YEEFRA
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general publi
c.
●
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or
Repair the product or products dealt with in this service information by anyone else could result in serious injury or death
Version：V1
Date：2020-11-23
Domestic air conditioner

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Summary of Contents for Haier 1U25YEEFRA

  • Page 1 SERVICE MANUAL Outdoor Unit Model No. 1U25YEEFRA WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general publi ● It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.

  • Page 2: Table Of Contents

    Contents Contents 1.Introduction ..................... 1 2.Specifications ..................7 3.Sensors list ..................... 8 ● 4.Pinping diagrams ..................9 ● 5.Operation range ..................10 6.Printed Circuit Board Connector Wiring Diagram ......... 11 7.Outdoor Functions and Control ............. 14 8.Dimensional drawings ................28 ●...

  • Page 3: Introduction

    Introduction 1.Introduction 1.1 Model name explanation Apply toT1; 220~240V50HZ/1ph DC inverter Heat pump & R32 refrigerant Version number Europe Platform of outdoor units: NEW 0.8P p latform Nominal cooling capacity ( 9000BTU/h ) Type of outdoor unit : U (normal type) The maximum combination number Domestic air conditioner...
  • Page 4 Intuoduction 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 ●...
  • Page 5 Intuoduction When disconnecting the suction or discharge pipe of the compressor at the welded section, release the refrigerant gas completely at a well-ventilated place first. If there is a gas remaining inside the compressor , the refrigerant gas or refrigerating machine oil discharges when the pipe is disconnected, and it can cause injury.
  • Page 6 Intuoduction 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.
  • Page 7 Intuoduction 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.
  • Page 8 Intuoduction 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. ●...

  • Page 9: Specifications

    Specification 2.Specifications NOMINAL DISTRIBUTION SYSTEM VOLTAGE ● NOMINAL CAPACITY and NOMINAL INPUT n i l Capacity rated Btu/h 8870 9890 ● Power Consumption(Rated) 0.78 6.2/A++ Annual energy consumption ³ 1.2*10 ﹣ ³ TECHNICAL SPECIFICATIONS-UNIT Dimensions H*W*D 700×245×544 ● Packaged H*W*D 845×320×593 Dimensions Weight...

  • Page 10: Sensors List

    Specification c t i TECHNICAL SPECIFICATIONS-OTHERS Refrigerant type Refrigerant charge 0.55 Refrigerant Maximum allowable distance circuit between indoor an outdoor Maximum allowable level difference ● Refrigerant control CAPILLARY liquid Φ6.35 Piping connections Φ9.52 (external diameter) drain Φ16 ● Heat insulation type Both liquid and Gas pipes ●...

  • Page 11: Pinping Diagrams

    Piping diagrams 4.Piping diagrams Capillary Capillary 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) CN50 Connector for power N,L, Communicate between indoor and outdoor unit and Ground CN51 Connector for reactor CN52 Connector for the U, V, W wire of the compressor CN21 Connector for fan motor...
  • Page 14 Wiring diagrams PCB(1) Domestic air conditioner...
  • Page 15 Wiring diagrams Wiring diagrams ● ● ● ● Domestic air conditioner...

  • Page 16: Outdoor Functions And Control

    Functions and control 7.Outdoor Functions and Control 7.1 Main functions and control specification .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 Minimu m operation frequency Maximum operation frequency ●...
  • Page 17 Functions and control Wh_c<-8 Max_hz2 99 HZ Wh_c<-2 Max_hz3 99 HZ Wh_c<5 Max_hz4 99 HZ Wh_c<10 Max_hz5 80 HZ Wh_c<17 Max_hz6 67 HZ Wh_c<20 Max_hz7 63 HZ Wh_c>＝20 Max_hz8 5 52 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.
  • Page 18 Functions and control When refrigerating, it is needed to satisfy 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.
  • Page 19 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 20 Functions and control 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;...
  • Page 21 Functions and control the compressor increases at the prohibited speed. During the starting process of the compressor, if the AC current is greater than 5A, the frequency of the compressor increases at the speed of no faster than 0.1HZ/second. Remarks: when the outdoor temperature is high, there’s compensation for AC current protection. (1) When the outdoor environment temperature is higher than 40℃, AC current protection value decreases by 1A.
  • Page 22 Functions and control                                                                                                                                                      ...
  • Page 23 Functions and control                                                                                                                                                      ...
  • Page 24 Functions and control                         4.2026 3.9686 3.7443 -1.65 1.59 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 ●...
  • Page 25 Functions and control                                                                                                                                                      ...
  • Page 26 Functions and control                         7928.7217 6647.4547 5568.2222 -2.84 2.39 7423.3626 6235.7109 5233.3554 -2.83 2.39 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...
  • Page 27 Functions and control                         624.3328 563.6604 508.4261 -2.12 1.93 593.5446 536.6540 484.7796 -2.10 1.92 564.4275 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...
  • Page 28 Functions and control                                                                                                                                                      ...
  • Page 29 Functions and control                                                                                                                                                      ...

  • Page 30: Dimensional Drawings

    Dimensional drawing 8.Dimensional drawings 9.Center of gravity ● Domestic air conditioner...

  • Page 31: Service Diagnosis

    Service diagnosis                                                                                                                                              ...
  • Page 32 Service diagnosis 10.3 Error Codes and Description indoor display Code indication Indoor displaying panel code indication Only For 498 and Outdoor Reference fault description 498A display (LED1 flash Page Other display (Red/Green Time times) Run □On★Flash■ Off) Indoor and Communication fault between Page.42 ■...
  • Page 33 Service diagnosis                                                                                                                                              ...
  • Page 34 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 ●...
  • Page 35 Service diagnosis 10.3.3 Indoor DC 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 d etected rotation feedback signal don’t received in 2 minutes ●...
  • Page 36 Service diagnosis                                                                                                                                              ...
  • Page 37 Service diagnosis Check whether Terminal on the outdoor mainboard is well inserted. it is normal Reinsert the terminals Electrify the machine again and turn it on in The motor and the Cool state with the remote controller. outdoor pcb are check whether the motor could run.
  • Page 38 Service diagnosis                                                                                                                                              ...
  • Page 39 Service diagnosis                                                                                                                                              ...
  • Page 40 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 ●...
  • Page 41 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...
  • Page 42 Service diagnosis                                                                                                                                              ...
  • Page 43 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 ■...
  • Page 44 Service diagnosis                                                                                                                                              ...
  • Page 45 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; ●...
  • Page 46 Service diagnosis                                                                                                                                              ...

  • Page 47: Performence And Cerves Diagrams

    Performance and ceves diagrams 11.Performence and cerves diagrams 11.1 Cooling capacity-temperature curves performance curves cooling value-temerature table indoor temp. outdoor temp. DB/WB 10℃ 15℃ 20℃ 25℃ 30℃ 35℃ 38℃ 40℃ 43℃ 21/15℃ 1539 1513 1479 1415 1767 1900 1857 1799 1697 24/16℃...
  • Page 48 Performance and ceves diagrams 11.2 power consumption value-temp. curves performance curves power consumption value-temp.table indoor temp. outdoor temp. DB/WB 10℃ 15℃ 20℃ 25℃ 30℃ 35℃ 38℃ 40℃ 43℃ 21/15℃ 24/16℃ 27/19℃ 30/22℃ 32/23℃ 35/24℃ 1005 power consumption and temp.curves 1100 1000 10℃...
  • Page 49 Performance and ceves diagrams 11.3 cooling discharge pressure and temp. curves performance curves cooling discharge pressure.table outdoor temp. indoor temp. (humidity 46%) DB/WB 21/15℃ 27/19℃ 35/24℃ 10℃ 1872 1973 2053 15℃ 1896 1999 2074 20℃ 1957 2025 2120 25℃ 2031 2104 2189 30℃...
  • Page 50 Performance and ceves diagrams cooling suction pressure and tempcurves curves 11.4 performance curves cooling suction pressure.table outdoor temp. indoor temp. (humidity 46%) DB/WB 21/15℃ 27/19℃ 35/24℃ 10℃ 1004 15℃ 1014 20℃ 1024 25℃ 1045 30℃ 1056 35℃ 1111 38℃ 1134 40℃...
  • Page 51 Performance and ceves diagrams heating capacity and indoor/outdoor temp.curves 11.5 performance curves heating capacity and indoor/outdoor temp.table outdoor temp. indoor temp.(humidity 46%) DB/WB 10℃ 20℃ 27℃ -15℃ 1593 1484 1416 -10℃ 2448 2238 2064 -7/-8℃ 3008 2727 2535 2/1℃ 3216 2838 2574 7/6℃...
  • Page 52 Performance and ceves diagrams 11.6 power consumption value-temp.curves performance curves power consumption value-temp.table outdoor temp. indoor temp.(humidity 46%) DB/WB ℃ ℃ ℃ ℃ ℃ ℃ -7/-8 ℃ ℃ ℃ 12/11 ℃ 18/16 ℃ 24/20 power consumption and temp 1200 1000 10℃...
  • Page 53 Performance and ceves diagrams heating discharge pressure and temp. curves 11.7 performance curves heating discharge pressure.table outdoor temp indoor temp. DB/WB 10℃ 20℃ 27℃ -15℃ 2560 2710 2776 -10℃ 2745 2922 3036 -7/-8℃ 3206 3344 3432 2/1℃ 3347 3626 3821 7/6℃...
  • Page 54 Performance and ceves diagrams heating suction pressure and temp. curves 11.8 performance curves heating suction pressure.table outdoor temp indoor temp. DB/WB 10℃ 20℃ 27℃ -15℃ -10℃ -7/-8℃ 2/1℃ 7/6℃ 12/11℃ 18/16℃ 1014 1053 1073 24/20℃ 1200 1239 1259 heating suction pressure and temp. curves 1400 1300 1200...

  • Page 55: Sound Level

    Circuit diagrams 12.Sound level Sound pressure level 230V,50HZ Sound power level Model Measuring location (cooling/heating) Cooling/heating microphone 1U25YEEFRA Domestic air conditioner...
  • Page 56 Circuit diagrams 13 Wiring Diagrams Outdoor unit control board circuit diagrams 2-1971798-1 2.2nF/250V com_on CY501 2.2nF/250V CY502 100nF PVCC AC-L-OUT AC-N-OUT i_com com_on Domestic air conditioner...
  • Page 57 Circuit diagrams CN51 PVCC 2232511-3 AC-N-OUT AC-N-OUT PVCC FFA30U60DN D25XB60 470nF/630V 220K/2W IGBT1 SGH40N60UFD LED2 470nF/630V AC-L-OUT AC-L-OUT +15V 0.015Ω± 1%-5W 100uF/25V 100Ω -1206 100nF TLP351 TLP351 2SC2412K 3_23_PFC_chopping N_Converter 4.7K± 1% 4.7K± 1% 3_21_IsOC_SH PVCC 100nF 10nF R117 130K± 1%-2010 9.1K±...
  • Page 58 Circuit diagrams 4_17_socket_p 4_18_RX_insider PB6/RXD2-A 4_19_TX_insider PB5/TXD2-A PLLVCC PA4/MTICO1B 4_64_VSP 3_21_IsOC_SH POE8# PA5/MTIOC1A 4_18_4-way_valve PLLVSS P10/IRQ0A 4_19_PTC_Relay 3_23_PFC_chopping MTIOC0A-A P11/IRQ1A 4_61_FB 4_24_TXD_PC TXD0 AVSS0 4_25_RXD_PC RXD0 VREFL0 1_26_SW2 PB0/MTIOC0D VREFH0 4_27_STEPA PA3/MTIOC2A AVCC0 4_28_STEPB PA2/MTIOC2B AN000 2_56_IDC 4_29_STEPC P94/MTIOC7A AN001 2_55_Vot_SH 4_30_STEPD P93/MTIOC7B...
  • Page 59 Sincere Forever ●...
  • Page 60 Outdoor Unit DC Inverter...
  • Page 61 Remove of front panel Outdoor unit Step Procedure Points 1.Features Loosen the service Be careful not to cover screw and cut your finger by remove the service the fins of the cover. heat exchanger Step Procedure Step Procedure Points Step Procedure Points Points 2.
  • Page 62 Loosen the screws of the panel. Pull and remove the front panel. Step Procedure Points Remove the fixting screws, then lift the electrical box Domestic air conditioner...
  • Page 63 Remove side panel Step Procedure Points ■ Loosen the fixting screws and remove the side panel. Remove the casing Step Procedure Points Loosen the fixting screws and remove the side panel. ■ Domestic air conditioner...

  • Page 64: Circuit Diagrams

    Step Procedure Points Loosen the fixting screws remove the fan Domestic air conditioner...
  • Page 65 Loosen the fixting screws and lift the fan motor. Release stepping motor (2type) Step Procedure Points Remove fixing screws,then lift the fan motor bracket Domestic air conditioner...
  • Page 66 Cut down and pull out compressor and remove Removal of Heat Exchanger Step Procedure Points Domestic air conditioner...
  • Page 67 Loosen the marked fixing screws Loosen the fixting hook remove heat exchanger Domestic air conditioner...
  • Page 68 Step Procedure Points Remove fixing screws,then lift valves Step Procedure Points Domestic air conditioner...
  • Page 69 Remove the fixing screw,then lift the valve set Domestic air conditioner...

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