Haier 1U50S2SJ2FA-1 Service Manual
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Haier 1U50S2SJ2FA-1 Service Manual

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SERVICE MANUAL
Model 1U50S2SJ2FA-1
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
2020(Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. Unauthorized copying and distribution is a violation of law
Haier Group
Version V1
Date 2020-01-08

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Summary of Contents for Haier 1U50S2SJ2FA-1

  • Page 1 Repair the product or products dealt with in this service information by anyone else could result in serious injury or death 2020(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 series 220~240V50HZ/1ph R32 refrigerant version 2 Outdoor casing Supermatch second generation normal efficiency Nominal cooling capacity (18000BTU/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 5.2(1.3-6.8 ） 6.0（1.4-6.9) Capacity rated 20470(4770-23540) Btu/h 17740(4430-23200) Power Consumption(Rated) 1401 ³ 2.0*10 ³ TECHNICAL SPECIFICATIONS-UNIT Dimensions H*W*D 820X338X614 Packaged H*W*D 963X413X685 Dimensions 37.8 41.5 dB(A) Sound level ELECTRICAL SPECIFICATIONS n i l...

  • Page 10: Sensors List

    Specification TECHNICAL SPECIFICATIONS-OTHERS Refrigerant type Refrigerant charge 0.95 Refrigerant Maximum allowable distance circuit between indoor an outdoor Maximum allowable level difference Refrigerant control liquid 6.35 Piping connections 12.7 (external diameter) drain Heat insulation type Both liquid and Gas pipes Max. piping Length Max.

  • Page 11: Piping Diagrams

    Piping 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

    Printed circuit board connector wiring diagram 6. Printed circuit board connector wiring diagram Connectors PCB (1) (Control PCB) For 1U18JEFFRA/1U24REFFRA/1U24REBFRA 1) CN1, CN2 Connector for power N and L 2) CN3 Connector for ground 3) CN23 Connector for DC POWER 15V and 5V to the module board 4) CN9, CN10 Connector for CN2,CN1 on the module board 5) CN22 Connector for fan motor 6) CN11 Connector for four way valve coil...
  • Page 14 Printed circuit board connector wiring diagram PCB (1) CN23 CN24 CN25 CN28 CN10 CN36 CN11 CN15 CN47 CN17 CN22 Domestic air conditioner...
  • Page 15 Printed circuit board connector wiring diagram PCB(2) CN10 CN11 Domestic air conditioner...
  • Page 16 Functions and control Wiring diagrams INDOOR UNIT 0010534175 OUTDOOR UNIT WIRING DIAGRAM COMPRESSOR CN28 BR(OR B) C(W) R(U) AC-L S(V) CN25 BL(OR W) AC-N FUSE1 T25A 250VAC CN24 CN36 CN11 MODULE COM COMB OUTDOOR PCB COMA CN6 CN7 CN8 CN9 BL(OR W) CN23 CN10...

  • 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 Minimum operation frequency Maximum operation frequency Heating 18K/24K 24 Hz /20Hz...
  • Page 18 Functions and control Wh_c<-2 Max_hz3 103HZ/87 HZ Wh_c<5 Max_hz4 90HZ/76 HZ Wh_c<10 Max_hz5 78HZ/67 HZ Wh_c<17 Max_hz6 67HZ/62 HZ Wh_c<20 Max_hz7 56HZ/44 HZ Wh_c> 20 Max_hz8 52HZ/39 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 19 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 20 Functions and control The EEV opening will increase if SH (superheat degree) >0 while decrease if SH<0. Adjust frequency: If |SH|=0, 60s/ 1 step If |SH| 3,and SH=0, 10s/ 1 step. If 3 |SH| 0, 30s/ 1 step. SH= current SH- last SH SH= Ts (suction temp)-Tc1 (indoor coil temp)-Tsh (fixed data, depend on different models, -1~2) 7.1.4 Four way control For the details of defrosting four-way valve control, see the defrosting process.
  • Page 21 Functions and control (18K/24K) TC( ) The compressor stops Fgh_t1 63 /63 Fgh_t1 2 Fgh_t2 2 N Decreasing the frequency rapidly Fgh_t2 59 /59 P Decreasing the frequency slowly Fgh_t3 56 /57 Fgh_t3 2 Fgh_t4—2 Q Prohibiting increasing the frequency Fgh_t4 53 /51 R Increasing slowly Fgh_t5 40 /40...
  • Page 22 Functions and control During the starting process of the compressor, if the AC current is greater than 13.5/14A(18K/24K), the frequency of the compressor decreases at the speed of 0.1HZ/second. During the starting process of the compressor, if the AC current is greater than 13A/13A(18K/24K), the frequency of the compressor increases at the prohibited speed.
  • Page 23 Functions and control control-driven chip will enter into weak magnetic control, this will help to relieve the problem of 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. 7.1.5.7 Temperature protection of the outdoor refrigerating coil When the frequency are higher than 40Hz,and the defrosting sensor’s temperature are higher than , the frequency of the compressor decreases 1hz/10seconds.
  • Page 24 Functions and control 35.6202 33.3552 31.2062 -1.38 1.31 33.8936 31.7844 29.7796 -1.36 1.29 32.2608 30.2968 28.4267 -1.34 1.28 30.7162 28.8875 27.1431 -1.32 1.26 29.2545 27.5519 25.9250 -1.29 1.24 27.8708 26.2858 24.7686 -1.27 1.22 26.5605 25.0851 23.6704 -1.25 1.20 25.3193 23.9462 22.6273 -1.23 1.18...
  • Page 25 Functions and control 5.5914 5.3269 5.0704 -1.33 1.29 5.3916 5.1308 4.8783 -1.37 1.33 5.2001 4.9430 4.6944 -1.41 1.36 5.0163 4.7630 4.5185 -1.45 1.40 4.8400 4.5905 4.3500 -1.49 1.44 4.6708 4.4252 4.1887 -1.53 1.47 4.5083 4.2666 4.0342 -1.57 1.51 4.3524 4.1145 3.8862 -1.61 1.55...
  • Page 26 Functions and control 1.3730 1.2525 1.1415 -3.27 3.01 1.3335 1.2153 1.1066 -3.32 3.06 1.2953 1.1794 1.0730 -3.38 3.10 1.2583 1.1448 1.0405 -3.43 3.15 1.2226 1.1113 1.0092 -3.48 3.19 1.1880 1.0789 0.9789 -3.53 3.24 1.1546 1.0476 0.9497 -3.58 3.28 1.1223 1.0174 0.9215 -3.64 3.33...
  • Page 27 Functions and control 13654.1707 11267.8730 9290.2526 -2.95 2.44 12735.8378 10531.3695 8700.6388 -2.93 2.44 11885.1336 9847.7240 8152.2338 -2.92 2.43 11096.6531 9212.8101 7641.8972 -2.91 2.42 10365.4565 8622.8491 7166.7474 -2.90 2.42 9687.0270 8074.3787 6724.1389 -2.88 2.41 9057.2314 7564.2244 6311.6413 -2.87 2.41 8472.2852 7089.4741 5927.0206 -2.86 2.40...
  • Page 28 Functions and control 996.7169 887.6792 789.8583 -2.29 2.06 945.1404 843.0486 751.3077 -2.27 2.04 896.4981 800.8922 714.8380 -2.26 2.03 850.6086 761.0603 680.3265 -2.24 2.02 807.3024 723.4134 647.6580 -2.22 2.00 766.4212 687.8205 616.7252 -2.20 1.99 727.8172 654.1596 587.4271 -2.18 1.98 691.3524 622.3161 559.6694 -2.16 1.96...
  • Page 29 Functions and control 129.2457 122.1630 115.3645 -1.40 1.34 123.8956 117.2504 110.8618 -1.37 1.32 118.7926 112.5589 106.5564 -1.35 1.30 113.9241 108.0776 102.4388 -1.32 1.28 109.2784 103.7961 98.5000 -1.30 1.26 104.8443 99.7046 94.7315 -1.28 1.23 100.6112 95.7939 91.1253 -1.25 1.21 96.5692 92.0553 87.6735 -1.23 1.19...
  • Page 30 Functions and control 26.1569 24.8685 23.6222 -1.57 1.52 25.3290 24.0574 22.8291 -1.61 1.55 24.5311 23.2765 22.0662 -1.65 1.59 23.7620 22.5245 21.3323 -1.69 1.63 23.0205 21.8002 20.6261 -1.73 1.66 22.3055 21.1025 19.9465 -1.77 1.70 21.6159 20.4303 19.2924 -1.81 1.74 20.9508 19.7825 18.6626 -1.85 1.77...

  • Page 31: Dimensional Drawings

    Dimensional drawings 8.Dimensional drawings 9.Center of gravity 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.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 Error Codes and Description indoor display 10.4 Split board: LED1 light of outdoor PCB flash; All-in-one board: LED2 light of outdoor PCB flash OUTDOOR ERROR CODE FAULT DESCRIPTION SPARE PART (LED FLASH TIMES) Indoor PCB Indoor and Communication fault between indoor Outdoor PCB Outdoor and outdoor units...
  • Page 34 Service Diagnosis OUTDOOR ERROR CODE FAULT DESCRIPTION SPARE PART (LED FLASH TIMES) Lack of refrigerant Refrigerant 4-way valve reverse failure 4-way valve Power over/under voltage protection Power module Outdoor pipe temperature sensor High pressure protection Outdoor PCB Outdoor coil temperature sensor Defrost temperature sensor Power module Outdoor Alternating current over...
  • Page 35 Service Diagnosis 10.4.1 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 Malfunction...
  • Page 36 Service Diagnosis 10.4.2 EEPROM abnormal E4: Indoor EEPROM error Indoor Display Indoor display F12: Outdoor EEPROM error; Outdoor LED1 flash 1 times Method of Malfunction The Data detected by the EEPROM are used to determine MCU Detection Malfunction When the data of EEPROM is error or the EEPROM is damaged Decision Conditions Supposed...
  • Page 37 Service Diagnosis Indoor DC fan motor malfunction 10.4.3 Indoor Display E14 Indoor DC fan motor malfunction Method of When the fan motor is running, the speed detected by the Hall IC is used to judge the Malfunction abnormal operation of the fan motor Detection Malfunction When the detected rotation feedback signal don’t received in 2 minutes...
  • Page 38 Service Diagnosis Turn on the unit and check if Measure whether there is a voltage the motor can run pulse (0-15VDC) between 4 and 5 of the CN9 terminal on the indoor PCB The indoor motor is damaged Is it ok? and need replace The indoor PCB is damaged and need replace...
  • Page 39 Service Diagnosis 10.4.4 Outdoor DC fan motor fault Outdoor display F8 LED1 flash 9 times Method of DC fan motor is detected by checking the fan running condition and so on Detection Malfunction When the detected rotation feedback signal don’t received i n2 minutes Decision Conditions ■...
  • Page 40 Service Diagnosis The resistances The module PCB is between black line and The resistances are damaged, replace it red line, between black more than 40kΩ with a new one. line and white line of the fan terminal of outdoor PCB are greater than 10MΩ...
  • Page 41 Service Diagnosis 10.4.5 IPM protection Outdoor display: F1 LED1 flash 2 times Method of IPM protection is detected by checking the compressor running condition and so on Malfunction Detection The system leads to IPM protection due to over current Malfunction Decision The compressor faulty leads to IPM protection Circuit component of IPM is broken and led to IPM protection...
  • Page 42 Service Diagnosis 10.4.6 Over-current of the compressor Outdoor Display F22, F2, F23 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 or the compressor is damaged. Decision Conditions Power supply voltage is too low or too high...
  • Page 43 Service Diagnosis 10.4.7 The communication fault between IPM and outdoor PCB Outdoor display: F3 LED1 flash 4 times Method of Malfunction Communication is detected by checking the IPM module and the outdoor PCB Detection Malfunction ■ The outdoor PCB broken leads to communication fault Decision ■...
  • Page 44 Service Diagnosis 10.4.8 Power Supply Over or under voltage fault Outdoor display: F19 LED1 flash 6 times An abnormal voltage rise or fall is detected by checking the specified voltage detection circuit. Method of The power supply is over voltage Malfunction Detection Malfunction...
  • Page 45 Service Diagnosis 10.4.9 Overheat Protection for Discharge Temperature Outdoor display: F4 LED1 flash 8 times Method of Check the control of the discharge temperature by the temperature detected by the Malfunction discharge pipe thermistor Detection Malfunction When the compressor discharge temperature is above 110℃ Decision Conditions ■...
  • Page 46 Service Diagnosis 10.4.10 The communication fault between indoor and outdoor Split board Indoor display E7 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 PCB: only indoor charged measure the voltage between 3 and 4 of IC6 on the indoor PCB with a universal meter. And measure the voltage between CN23(S) and CN17 (L) with a universal meter. If the voltage is a constant value from DC 0V to DC 5V.Or The indoor PCB is the voltage between...
  • Page 48 Service Diagnosis Remove fan motor after Fan motor is switch off the power and damaged. And restart the unit, the LED replace it with a new 1 becomes light or flash. one. Test the fan motor terminal resistance between pin 1(310V) and pin 4(0V), or pin 5(15V) and pin 4(0V) of CN21 are close to 0mΩ...
  • Page 49 Service Diagnosis All-in-one board Indoor display E7 outdoor display LED2 flash 15 times Method of Communication is detected by checking the indoor PCB and the outdoor PCB. Malfunction Detection The outdoor PCB broken leads to communication fault. Malfunction  The indoor PCB broken leads to communication fault. Decision ...
  • Page 50 Service Diagnosis Check the indoor PCB: Only indoor charged measure the voltage between 3 and 4 of IC6 on the indoor mainboard with a universal meter. And measure the voltage between CN23(S) and CN52 (L) with a universal meter. If the voltage is a constant value of 0V DC to 5V DC .Or the voltage between communication line (red) The indoor PCB is damaged;...
  • Page 51 Service Diagnosis Remove fan motor after switch off the power and Fan motor is damaged. Replace restart the unit, the LED 2 it with a new one. becomes light or flash. Test the fan motor terminal resistance between pin 1 (310V) and pin 4 (0V), or pin5 (15V) and pin4 (0V) of CN21 are close to 0mΩ...
  • Page 52 Service Diagnosis 10.4.11 Loss of synchronism detection (Compressor position detection circuit fault) Outdoor Display F11 LED1 flash 18 times F28 LED1 flash 19 times Method of The position of the compressor rotor can’t 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 53 Service Diagnosis 10.4.12 High work-intense protection Outdoor display E 9 LED1 flash 21 times High work-intense control is activated in the heating mode if the temperature Method of Malfunction being sensed by the heat exchanger thermistor exceeds the limit. Detection Malfunction Activated when the temperature being sensed by the heat exchanger rises above 65℃...

  • Page 54: Performance And Curves Diagrams

    Performance and curves diagrams 11.Performence and curves diagrams 11.1 Cooling capacity-temperature curves Domestic air conditioner...
  • Page 55 Performance and curves diagrams 11.2 Cooling power consumption value- temperature curves Domestic air conditioner...
  • Page 56 Performance and curves diagrams 11.3 Cooling discharge pressure curves Domestic air conditioner...
  • Page 57 Performance and curves diagrams 11.4 Cooling suction pressure curves Domestic air conditioner...
  • Page 58 Performance and curves diagrams 11.5 Heating capacity-temperature curves Domestic air conditioner...
  • Page 59 Performance and curves diagrams 11.6 Heating power consumption value- temperature curves Domestic air conditioner...
  • Page 60 Performance and curves diagrams 11.7 Heating discharge pressure curves Domestic air conditioner...
  • Page 61 Performance and curves diagrams 11.8 Heating suction pressure curves Domestic air conditioner...

  • Page 62: Circuit Diagrams

    ircuit Diagra 12. Circuit diagrams 12.1 Outdoor unit control board circuit diagrams omestic air conditioner...
  • Page 63 ircuit Diagra omestic air conditioner...
  • Page 64 ircuit Diagra 12.2 Module board circuit diagram omestic air conditioner...

  • Page 65: 1 3

    13. Removal Procedure 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 Domestic air conditioner...
  • Page 66 Step Procedure Step Procedure Points Step Procedure Points Points 2. Remove the panels. Loosen the 7 screws and lift the top panel Loosen the screws of the panel. Pull and remove the front panel. Domestic air conditioner...
  • Page 67 Step Procedure Points Remove the fixting screws, then lift the electrical box Domestic air conditioner...
  • Page 68 Remove the air filters and horizontal flap Step Procedure Points Loosen the fixting screws and remove back protect net . ■ Loosen the fixting screws and remove the side panel. Domestic air conditioner...
  • Page 69 Remove the casing Step Procedure Points Loosen the fixting screws and remove the side panel. ■ Loosen the fixting screws and remove the cross beam. Domestic air conditioner...
  • Page 70 Step Procedure Points Loosen the fixting screws remove the fan Loosen the fixting screws and lift the fan motor. Domestic air conditioner...
  • Page 71 Release stepping motor (2type) Step Procedure Points Remove fixing screws,then lift the fan motor bracket Cut down and pull out compressor and remove Domestic air conditioner...
  • Page 72 Removal of Heat Exchanger Step Procedure Points Loosen the marked fixing screws Loosen the fixting hook remove heat exchanger Domestic air conditioner...
  • Page 73 Step Procedure Points Remove fixing screws,then lift heating pipe Remove fixing screws,then lift valves Domestic air conditioner...
  • Page 74 Step Procedure Points Remove fixing screw,then lift valve set Domestic air conditioner...
  • Page 75 86-300 Grudziądz +48 723 737 378 www.haier-ac.pl Producent: Qingdao Haier Air Conditioner Electric Co., Ltd. Haier lndustrial Park, Qianwangang Road, Eco-Tech Development Zone, Qingdao 266555, Shandong, R.P.C. +86 532 88936943 www.haier.com Haier zastrzega sobie prawo do wprowadzania zmian bez wcześniejszego powiadomienia.

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