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Haier 1U50MEMFRA-C Service Manual

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SERVICE MANUAL
1U50MEMFRA-C
Model
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
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：20
-11-23
Domestic air conditioner

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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 2020 (Qingdao Haier Air Conditioner General corp. , Ltd) All rights reserved. Unauthorized copying and distribution is a violation of law Haier Group Version：V1...

  • 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 self clean Apply toT1; 220~240V50HZ/1ph DC inverter Heat pump & R32 refrigerant Version number Europe Platform of outdoor units: NEW 1.5P platform Nominal cooling capacity (18000BTU/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 ● 220-240 NOMINAL CAPACITY and NOMINAL INPUT n i l Capacity rated Btu/h 17060 17740 ● Power Consumption(Rated) 1.55 1.40 Annual energy consumption 1610 ³ 2.0*10 ﹣³ TECHNICAL SPECIFICATIONS-UNIT Dimensions H*W*D 800×275×553 ● Packaged H*W*D 908×405×625 Dimensions...

  • Page 10: Sensors List

    Specification c t i TECHNICAL SPECIFICATIONS-OTHERS Refrigerant type Refrigerant charge 0.90 Refrigerant Maximum allowable distance circuit between indoor an outdoor Maximum allowable level difference ● Refrigerant control capillary liquid Φ6.35 Piping connections Φ12.7 (external diameter) drain Φ16 ● Heat insulation type Both liquid and Gas pipes ●...

  • Page 11: Pinping 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

    Wiring diagrams 6.Printed Circuit Board Connector Wiring Diagram Connectors PCB (1) (Outdoor Control PCB) Connector for power N and ● Connector for ground CN2’ CN3’ Connector for the U, V, W wire of the compressor CN4’ LI (CN7) Connector for reactor LO (CN6) CN21 Connector for fan motor...
  • Page 14 Wiring diagrams PCB (1) Bottom L N PE heater 4-way valve E-valve Sensor DC fan motor ● Compressor PFC Reactor ● 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 112HZ Wh_c<-8 Max_hz2 112HZ Wh_c<-2 Max_hz3 94HZ Wh_c<5 Max_hz4 78HZ Wh_c<10 Max_hz5 67HZ Wh_c<17 Max_hz6 56HZ Wh_c<20 Max_hz7 52HZ Wh_c>＝20 Max_hz8 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. Refrigeration/dehumidification mode: Serial No.
  • 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 6.5A, 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 2A/1A(09K/12K).
  • Page 22 Functions and control the compressor decreases 1hz/10seconds. Keep the frequency until it decreases to the lowest frequency. When the temperatures are lower than 68℃ and higher than 62℃, keep the frequency of the compressor. When the temperatures are lower than 62℃, relieve the defrosting temperature protection. 7.2 Value of Thermistor Ambient Sensor, Defrosting Sensor, Pipe sensor ●...
  • Page 23 Functions and control 25.3193 23.9462 22.6273 -1.23 1.18 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...
  • 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 ● 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...
  • Page 25 Functions and control 1.0607 0.9599 0.8679 -3.74 3.42 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...
  • 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 -2.77 2.36 5375.5683 4558.1906 3861.6201 -2.76 2.35 5045.9114 4286.5535 3638.1938 -2.75 2.34...
  • 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 -2.03 1.86 463.1208 421.7683 383.7626 -2.01 1.84 441.0535 402.2430 366.5175 -1.99 1.83...
  • Page 28 Functions and control 85.4976 81.7908 78.1744 -1.15 1.12 82.1303 78.6615 75.2715 -1.13 1.10 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...
  • Page 29 Functions and control 18.5157 17.4166 16.3680 -2.02 1.93 17.9590 16.8769 15.8458 -2.06 1.96 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...

  • Page 30: Dimensional Drawings

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

  • Page 31: 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 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 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 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 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 d etected rotation feedback signal don’t received in 2 minutes ●...
  • Page 36 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 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 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 ■...
  • Page 39 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 ●...
  • 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 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 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 If the voltage is a constant value The indoor mainboard is of 0V DC to 5V DC.Or the voltage damaged; replace it with a between Communication line(red ) and N(white new one. line) is not close to18V DC when only indoor charged. Test the outdoor power is Check the cable supply 230VAC with a...
  • 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 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℃...

  • 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℃ 3824 3761 3736 3478 4246 4664 4648 4487 4205...
  • Page 48 Performance and ceves diagrams   11.2 Cooling power consumption value- temperature 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℃ 1234 1213 1205 1260 1589 1841 1966 24/16℃...
  • Page 49 Performance and ceves 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℃ 10℃ 1899 1986 2068 15℃ 1917 2012 2108 20℃ 1938 2039 2144 25℃ 2038 2118 2261 30℃...
  • Page 50 Performance and ceves 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℃ 10℃ 1005 15℃ 1015 20℃ 1025 25℃ 1046 30℃ 1057 35℃ 1112 38℃ 1135 40℃ 1086 1249 43℃...
  • Page 51 Performance and ceves diagrams   11.5 Heating capacity-temperature curves performance curves heating capacity and indoor/outdoor temp.table outdoor temp. indoor temp.(humidity 46%) DB/WB 10℃ 20℃ 27℃ -15℃ 3021 2815 2686 -10℃ 4644 4246 3916 -7/-8℃ 5707 5174 4808 2/1℃ 6101 5384 4882 7/6℃...
  • Page 52 Performance and ceves diagrams   11.6 Heating power consumption value- temperature curves performance curves power consumption value-temp.table outdoor temp. indoor temp.(humidity 46%) DB/WB ℃ ℃ ℃ ℃ 1293 1361 1443 ℃ 1549 1613 1694 ℃ -7/-8 1617 1720 1806 ℃ 1679 1768 1856...
  • Page 53 Performance and ceves diagrams   11.7 Heating discharge pressure curves performance curves heating discharge pressure.table outdoor temp indoor temp. DB/WB 10℃ 20℃ 27℃ -15℃ 2578 2706 2771 -10℃ 2784 2917 2997 -7/-8℃ 3160 3338 3467 2/1℃ 3334 3619 3743 7/6℃ 3330 3514 3696...
  • Page 54 Performance and ceves diagrams   11.8 Heating suction pressure curves 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℃ 1010 1050 1070 24/20℃ 1196 1236 1256 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 1U50MEGFRA ● Domestic air conditioner...
  • Page 56 Circuit diagrams 13 Wiring Diagrams 13.1 Outdoor unit control board circuit diagrams ICE5AR4770BZ Domestic air conditioner...
  • Page 59 Remove of front panel Outdoor unit 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 60 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 61 Remove the fixting screws, then lift the electrical box Domestic air conditioner...
  • Page 62 Remove the air filters and horizontal flap Loosen the fixting screws and remove back protect net . ■ Loosen the fixting screws and remove the side panel. Domestic air conditioner...
  • Page 63 Remove the casing Loosen the fixting screws and remove the side panel. ■ Loosen the fixting screws and remove the cross beam. Domestic air conditioner...

  • Page 64: Circuit Diagrams

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