Haier 1U35YEFFRA-C Service Manual
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Haier 1U35YEFFRA-C Service Manual

Wall mounted type dc inverter
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SERVICE MANUAL
Wall Mounted Type
DC Inverter
Model No.
1U35YEFFRA-C
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
2018 (Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. Unauthorized copying and distribution is a violation of law
Haier Group
Version V1
Date 2020-10-30

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Summary of Contents for Haier 1U35YEFFRA-C

  • Page 1 Repair the product or products dealt with in this service information by anyone else could result in serious injury or death 2018 (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 self clean Apply toT1; 220~240V50HZ/1ph DC inverter Heat pump & R32 refrigerant Version number Europe Platform of outdoor units: 0.8P Platform Nominal cooling capacity (12000BTU/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 If the refrigerant gas discharges during the repair work, do not touch the discharging refrigerant gas .The refrigerant gas can cause frostbite. 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 cooling machine oil discharges ●...
  • Page 6 Introduction 1.2.3 Cautions Regarding Products after Repair Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to 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.
  • Page 7 Introduction 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. If a child swallows the coin battery, see a doctor immediately. Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the ●...
  • Page 8 Introduction 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. If the installation platform or frame has corroded, replace it.

  • Page 9: Specifications

    Specification 2 .Specifications NOMINAL DISTRIBUTION SYSTEM VOLTAGE 0-240 NOMINAL CAPACITY and NOMINAL INPUT cooling heating 3.2（0.8-3.6） 3.4 （0.8-4.2） Capacity rated Btu/h 10920(2730-12286 ） 11603 （ 2730-14330） Power Consumption(Rated) 1.07 ³ 1.4*10 ³ TECHNICAL SPECIFICATIONS-UNIT Dimensions H*W*D 700×245×544 Packaged H*W*D 845×320×593 Dimensions 23.5 dB(A)

  • Page 10: Sensors List

    Specification TECHNICAL SPECIFICATIONS-OTHERS Refrigerant type Refrigerant charge 0.53 Refrigerant Maximum allowable distance circuit between indoor an outdoor Maximum allowable level difference Refrigerant control CAPILLARY liquid 6.35 Piping connections 9.52 (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

    Printed circuit board connector wiring diagram 6. Printed circuit board connector wiring diagram (Control PCB) For 1U35YEFFRA-C Connector for power N and L Connector for ground Connector for the U, V, W wire of the compressor L-IN (CN5) Connector for reactor...
  • Page 14 Functions and control Wiring diagrams OUTDOOR UNIT Domestic air conditioner...

  • Page 15: 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 09K 32Hz...
  • Page 16 Functions and control Wh_c<-2 Max_hz3 99HZ Wh_c<4 Max_hz4 99HZ Wh_c<10 Max_hz5 71HZ Wh_c<17 Max_hz6 67HZ Wh_c<20 Max_hz7 59HZ Wh_c> 20 Max_hz8 48HZ 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 17 Functions and control 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 18 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 19 Functions and control (09K) TC( ) The compressor stops Fgh_t1 63 Fgh_t1 2 Fgh_t2 2 N Decreasing the frequency rapidly Fgh_t2 60 P Decreasing the frequency slowly Fgh_t3 57 Fgh_t3 2 Fgh_t4—2 Q Prohibiting increasing the frequency Fgh_t4 52 R Increasing slowly Fgh_t5 40 Fgh_t5—2 Normal...
  • Page 20 Functions and control the compressor decreases at the speed of 0.1HZ/second. During the starting process of the compressor, if the AC current is greater than 7.5A, the frequency of 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.
  • Page 21 Functions and control 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 defrosting temperature and the sensor’s temperature are higher than 68 , the frequency of the compressor decreases 1hz/10seconds.
  • Page 22 Functions and control 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 24.1432 22.8656 21.6361 -1.20 1.16...
  • Page 23 Functions and control 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 4.2026 3.9686 3.7443 -1.65 1.59 4.0588 3.8287 3.6084 -1.70 1.62...
  • Page 24 Functions and control 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 1.0910 0.9882 0.8942 -3.69 3.37 1.0607 0.9599 0.8679 -3.74 3.42 1.0314 0.9326 0.8424 -3.80 3.46...
  • Page 25 Functions and control 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 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...
  • Page 26 Functions and control 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 1.96 656.8979 592.1831 533.3634 -2.14 1.95 624.3328 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...
  • Page 27 Functions and control 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 92.7088 88.4805 84.3690 -1.20 1.17 89.0211 85.0614 81.2048 -1.18 1.15 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...
  • Page 28 Functions and control 21.6159 20.4303 19.2924 -1.81 1.74 20.9508 19.7825 18.6626 -1.85 1.77 20.3091 19.1582 18.0563 -1.89 1.81 19.6899 18.5564 17.4723 -1.93 1.85 19.0924 17.9761 16.9098 -1.98 1.89 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...

  • Page 29: Dimensional Drawings

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

  • Page 30: 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 31 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 32 Service diagnosis 10.3 Error Codes and Description indoor display Code indication Indoor displaying panel code indication Outdoor Referenc Only For 498 and (LED1 fault description e Page 498A display flash Other display (Red/Green Time Run times) □On★Flash■Off) Indoor Communication fault between indoor and outdoor units 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 Conditions Supposed...
  • 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 detected rotation feedback signal don’t received in 2 minutes Decision Conditions Supposed...
  • 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 Domestic air conditioner...
  • Page 38 Service diagnosis 10.3.5 IPM protection / F1 LED1 flash 2 times Outdoor display: 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...
  • Page 39 Service diagnosis 10.3.6 Over-current of the compressor Outdoor Display: F2 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 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 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 An voltage signal is fed from the voltage detection circuit to the microcomputer...
  • Page 42 Service diagnosis 10.3.9 Overheat Protection For Discharge Temperature Outdoor display: F4 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 The indoor PCB broken leads to communication fault.
  • 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; Decision or the compressor is damaged Conditions...
  • 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 twices in 30 minutes.
  • Page 47 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 10℃ 15℃ 20℃ 25℃ 30℃ 35℃ 38℃ 40℃ 43℃ 21/15℃ 2421 2418 2296 2207 2764 2953 2944 2843 2578 24/16℃...

  • Page 48: Performance And Curves Diagrams

    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 10℃ 15℃ 20℃ 25℃ 30℃ 35℃ 38℃ 40℃ 43℃ 21/15℃ 1048 1193 1232 24/16℃ 1034 1216 1288 27/19℃ 1137 1328 1417 30/22℃...
  • Page 49 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℃ 10℃ 1994 2108 2197 15℃ 2041 2136 2270 20℃ 2091 2164 2287 25℃ 2131 2248 2325 30℃...
  • Page 50 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℃ 10℃ 1060 1232 15℃ 1071 1244 20℃ 1093 1257 25℃ 1104 1283 30℃ 1024 1162 1295 35℃...
  • Page 51 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 10℃ 20℃ 27℃ -15℃ 1991 1855 1769 -10℃ 3060 2798 2580 -7/-8℃ 3760 3409 3168 2/1℃ 4020 3547 3217 7/6℃...
  • Page 52 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 ℃ ℃ ℃ ℃ ℃ 1029 1071 1125 -7/-8 ℃ 1074 1142 1200 ℃ 1115 1174 1233 ℃ 1033 1076 1130...
  • Page 53 Performance and curves diagrams 11.7 Heating discharge pressure curves performance curves heating discharge pressure.table outdoor temp indoor temp. DB/WB 10℃ 20℃ 27℃ -15℃ 2825 2965 3040 -10℃ 3025 3196 3329 -7/-8℃ 3465 3658 3759 2/1℃ 3632 3966 4144 7/6℃ 3667 3850 3991 12/11℃...
  • Page 54 Performance and curves 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℃ 1011 1051 1071 24/20℃ 1197 1237 1257 heating suction pressure and temp. curves 1400 1300 1200...

  • Page 55: Circuit Diagrams

    ircuit Diagra 12. Circuit diagrams 12.1 Outdoor unit control board circuit diagrams omestic air conditioner...
  • Page 56 ircuit Diagra omestic air conditioner...
  • Page 57 Circuit diagrams Sincere Forever Haier Group Edited by : Shi Haiyan Haier Industrial Park, No.1, Haier Road Yang Xiaodong 266101, Qingdao, China_ Signed by : Yang Wenjun Http //www.haier.com Approved by: Wu Hongjin Domestic air conditioner...
  • Page 58 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 59 Removal Procedure 1.Removal of Outdoor panel...
  • Page 60 Removal Procedure Domestic Air Condition...
  • Page 61 Removal Procedure Domestic Air Condition...
  • Page 62 Removal Procedure 2.Removal of Electrical Box...
  • Page 63 Removal Procedure 3.Removal of Fan and Fan Motor...
  • Page 64 Removal Procedure 4.Removal of fan motor brcked and partition...
  • Page 65 Removal Procedure Domestic Air Condition...
  • Page 66 Removal Procedure 5.Removal of compressor and heat exchanger...
  • Page 67 Removal Procedure Domestic Air Condition...

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