Haier T-Series Service Manual
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Haier T-Series Service Manual

Wall mounted type dc inverter air conditioner
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SERVICE MANUAL
Wall Mounted Type
DC Inverter T-Series
Model No.
1U26BA1ERA
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
2016 (Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. Unauthorized copying and distribution is a violation of law
Haier Group
Version：V1
Date：2016-10-30

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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 2016 (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 .................... 2. Specifications..................3. Sensors list .................... 4. Piping diagrams ..................5. Operation range ..................6. Printed Circuit Board Connector Wiring Diagram ......... 7. Functions and Control................8. Dimensional drawings................9. Conter of gravity ................... 10.Service Diagnosis................. 11.

  • Page 3: Introduction

    Introduction 1 Introduction 1.1 Model name explanation Apply toT1; 220~240V50Hz1Ph DC inverter Heat pump & R410A refrigerant Version number Australia Platform of outdoor units: B (B platform) Nominal cooling capacity (2600W) 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.
  • 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...
  • Page 7 Introduction Do not install the equipment in a place where there is a possibility of combustible gas leaks. If a combustible gas leaks and remains around the unit, it can cause a fire. Be sure to install the packing and seal on the installation frame properly. If the packing and seal are not installed properly, water can enter the room and wet the furniture and floor.
  • Page 8 Introduction Check the grounding, and repair it if the equipment is not properly grounded. Improper grounding can cause an electrical shock. Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 M ohm or higher.

  • Page 9: Specifications

    Specification 2 Specifications NOMINAL DISTRIBUTION SYSTEM VOLTAGE 220~240 NOMINAL CAPACITY and NOMINAL INPUT n i l 2.65(1.2-3.0) 3.3(1.3-3.6) Capacity rated Btu/h 9000(4100-10200) 11200(4400-12200) Power Consumption(Rated) 0.69 0.78 4.23 3.84 ³ 1.2*10 TECHNICAL SPECIFICATIONS-UNIT Dimensions H*W*D 780×245×540 Packaged H*W*D 920×351×620 Dimensions 29.0 32.7 Sound level...

  • Page 10: Sensors List

    Specification TECHNICAL SPECIFICATIONS-OTHERS Refrigerant type R410a Refrigerant charge 0.85 Refrigerant Maximum allowable distance circuit between indoor an outdoor Maximum allowable level difference Refrigerant control liquid Φ6.35 Piping connections Φ9.52 (external diameter) drain Φ16 Heat insulation type Both liquid and Gas pipes Max.

  • Page 11: Piping Diagrams

    Pinping diagrams 4．Pinping 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 PCB (1) (Outdoor Control PCB) 1) C N 1, C N 2 C onnector for power N and L 2) C N 3 C onnector for ground 3) C N 23 C onnector for DC P OW E R 15Vand 5V to the m odule board 4) C N 9, C N10 C onnector for C N 2,C N 1 on the m odule board 5) C N 22 C onnector for fan m otor 6) CN 11 C onnector for four way v alv e coil...
  • Page 14 Connector Wiring Diagram CN27 CN26 CN23 CN24 CN22 CN50 CN17 CN47 CN15 CN11 CN36 CN10 CN9 Domestic Air Conditioner...
  • Page 15 Connector Wiring Diagram PCB (2) CN11 CN10 Domestic Air Conditioner...

  • Page 16: Functions And Control

    Functions and control Wiring diagrams OUTDOOR WIRING DIAGRAM 0010588937A Domestic air conditioner...
  • Page 17 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 7.1.1.2 The starting of compressor When the compressor is started for the first time, it must be kept under the conditions of 58Hz,88Hz for...
  • Page 18 Functions and control < ≥ Max_hz3 90 HZ Wh_c < ≥ Max_hz5 60 HZ Wh_c 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. When the starting ability is not the maximum, its maximum frequency limitation is calculated by the following equations: The frequency limitation which is affected by the temperature and under the condition of actual ability＝the actural running system ability*the maximum frequency which is limited by the temperature and under the...
  • Page 19 Functions and control During the compressor is started for 3 seconds, the outdoor fan is controlled the airflow speed according to the temperature conditions of the outdoor environment. Tao（℃） Tao <22℃ 22℃5< Tao <29℃5 Tao≥29℃5 Tao（℃） Tao <10℃ 10℃< Tao <16℃ Tao≥16℃...
  • Page 20 Functions and control 7.1.5 ：Protection function 7.1.5.1：TTC high temperature-preventing protection Once the machine is started, it can run TTC overheating protection of air-blowing, but air-blowing sensor malfunction must alarm after 4 minutes during which the compressor is started (during the course of self-detection, there’s no such limitation) Sensor detection methods: 100 times (one cycle of procedure run is one time, and about 5ms, detection method for each time: continuously sampling for 8 times, then order them and take the mean value of the...
  • Page 21 Functions and control Remarks: the outdoor unit 7.1.5.3：The control of preventing the overcurrent of the compressor： ●During the starting process of the compressor, if the current of the compressor is greater than 15A for 3 seconds, stop the compressor and alarm, after 3 minutes, start it again, if such state appears 3 times in 20 minutes, stop the compressor and alarm, and confirm the malfunction.
  • Page 22 Functions and control When Tpg_indoor begins to rise again, and ice_temp_2≤Tpg_indoor≤ ice_temp_3℃, the frequency of thecompressor doesn’t change. When ice_temp_3〈Tpg_indoor〈ice_temp_4℃, the frequency of the compressor increases at the speed of 1HZ/10seconds. For example, Tpg_indoor≤0℃，last for 2 minutes, and then the outdoor unit will stop, and report underload malfunction, but don’t send malfunction report to the indoor.
  • Page 23 Functions and control Frost-removing temperature sensor failure Ambient temperature sensor failure Exhaust temperature sensor failure Communication fault between indoor and outdoor units deviate from the normal for the compressor ---- Loop of the station detect error High work-intense protection Overcurrent of the compressor Overcurrent protection for single-phase of the compressor ---- The socket protect...
  • Page 24 Functions and control 130.2371 117.4366 105.7989 -1.87 1.70 122.8484 110.9627 100.1367 -1.85 1.69 115.9272 104.8882 94.8149 -1.83 1.67 109.4410 99.1858 89.8106 -1.81 1.66 103.3598 93.8305 85.1031 -1.80 1.64 97.6556 88.7989 80.6728 -1.78 1.63 92.3028 84.0695 76.5017 -1.76 1.62 87.2775 79.6222 72.5729 -1.74 1.60...
  • Page 25 Functions and control 13.3431 12.8572 12.3778 -0.88 0.87 12.7718 12.3223 11.8780 -0.86 0.85 12.2280 11.8126 11.4011 -0.83 0.83 11.7102 11.3267 10.9459 -0.81 0.80 11.2172 10.8634 10.5114 -0.78 0.78 10.7475 10.4216 10.0964 -0.75 0.75 10.3000 10.0000 9.7000 -0.75 0.75 9.8975 9.5974 9.2980 -0.76 0.76...
  • Page 26 Functions and control 2.5396 2.3611 2.1932 -2.31 2.17 2.4591 2.2840 2.1195 -2.36 2.21 2.3815 2.2098 2.0486 -2.40 2.25 2.3068 2.1383 1.9803 -2.45 2.29 2.2347 2.0695 1.9147 -2.49 2.34 2.1652 2.0032 1.8516 -2.54 2.38 2.0983 1.9393 1.7908 -2.59 2.42 2.0337 1.8778 1.7324 -2.63 2.46...
  • Page 27 Functions and control 0.6877 0.6140 0.5478 -4.63 4.16 0.6700 0.5977 0.5328 -4.69 4.21 0.6528 0.5820 0.5183 -4.74 4.26 0.6361 0.5667 0.5043 -4.80 4.31 0.6200 0.5518 0.4907 -4.86 4.36 0.6043 0.5374 0.4775 -4.92 4.41 0.5891 0.5235 0.4648 -4.98 4.45 0.5743 0.5100 0.4524 -5.04 4.50...
  • Page 28 Functions and control 2434.5487 2112.5459 1831.4826 -2.56 2.24 2296.6230 1996.2509 1733.6024 -2.55 2.23 2167.2730 1887.0018 1641.4966 -2.53 2.22 2045.9191 1784.3336 1554.7931 -2.52 2.21 1932.0242 1687.8144 1473.1460 -2.50 2.20 1825.0899 1597.0431 1396.2333 -2.48 2.19 1724.6540 1511.6468 1323.7551 -2.47 2.17 1630.2870 1431.2787 1255.4324 -2.45 2.16...
  • Page 29 Functions and control 239.0983 221.9825 205.9065 -1.71 1.61 228.4809 212.4060 197.2844 -1.69 1.59 218.3860 203.2887 189.0648 -1.67 1.57 208.7855 194.6066 181.2273 -1.65 1.55 199.6531 186.3369 173.7524 -1.63 1.54 190.9639 178.4584 166.6217 -1.60 1.52 182.6945 170.9508 159.8181 -1.58 1.50 174.8228 163.7951 153.3249 -1.56 1.48...
  • Page 30 Functions and control 38.9643 37.5045 36.0668 -1.11 1.09 37.6569 36.2078 34.7831 -1.14 1.13 36.3996 34.9622 33.5513 -1.18 1.16 35.1903 33.7653 32.3689 -1.22 1.19 34.0269 32.6151 31.2338 -1.26 1.23 32.9075 31.5096 30.1438 -1.30 1.27 31.8302 30.4467 29.0970 -1.33 1.30 30.7933 29.4246 28.0915 -1.37 1.34...
  • Page 31 Functions and control 9.7563 8.9971 8.2895 -3.00 2.80 9.4901 8.7441 8.0495 -3.05 2.84 9.2322 8.4993 7.8175 -3.09 2.88 8.9824 8.2623 7.5931 -3.14 2.92 8.7404 8.0329 7.3760 -3.19 2.96 8.5059 7.8108 7.1660 -3.24 3.00 8.2787 7.5958 6.9629 -3.29 3.04 8.0584 7.3875 6.7664 -3.33 3.09...

  • Page 32: Dimensional Drawings

    Dimensinal drawings 8.Dimensional drawings 1U09BA1ERA unit:mm 12.7 9.Center of gravity unit:mm 294.4 112.9 Domestic air conditioner...

  • Page 33: Service Diagnosis

    Connector Wiring Diagram 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 34 Connector Wiring Diagram Indoor and Communication fault between indoor ■ ■ ★ Outdoor and outdoor units Room temperature sensor failure ★ ■ ■ Indoor Heat-exchange sensor failure ★ □ □ Malfunction Indoor EEPROM error ★ □ ★ Indoor fan motor malfunction ■...
  • Page 35 Seivice diagnosis Check the connector connection. Correct the connection Is it normal? Thermistor resistance check Replace the thermistor Is it normal? Replace the indoor unit PCB Thermistor resistance check method: Remove the connector of the thermistor on the PCB, and measure the resistance of thermistor using tester. The relationship between normal temperature and resistance is shown in the value of indoor thermistor.
  • Page 36 Seivice 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 Conditions Supposed ■ DC fan motor protection dues to the DC fan motor faulty Causes ■...
  • Page 37 Seivice 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 38 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 39 Seivice 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 ■...
  • Page 40 Seivice 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 41 Seivice 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 42 Seivice 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 43 Seivice 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 44 Seivice 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 63℃...

  • Page 45: Performance And Cerves Diagrams

    Capacity 11 Perforance and curves diagrams 11.1 Cooling capacity temperature curves AS26TB1HRA 1U26BA1ERA performance curves cooling value-temerature table indoor temp. DB/WB -15℃ -10℃ 0℃ 10℃ 20℃ 25℃ 30℃ 35℃ 40℃ 46℃ 1934 2007 1953 1874 1808 2176 2423 2342 2282 2145 18/12℃...
  • Page 46 Capacity 11.2 Power consumption temperature curves AS26TB1HRA 1U26BA1ERA performance curves power consumption value-temp.table indoor temp. DB/WB 0℃ 10℃ 20℃ 25℃ 30℃ 35℃ 40℃ 46℃ －15℃ －10℃ 18/12℃ 21/15℃ 24/16℃ 27/19℃ 30/22℃ 32/23℃ power consumption-temp.curves 1100 1000 －15℃ －10℃ 0℃ 10℃ 20℃...
  • Page 47 capacity 11.3 Heating capacity temperature curves AS26TB1HRA 1U26BA1ERA performance curves heating capacity and indoor/outdoor temp.table indoor temp.(humidity 46%) outdoor temp. DB/WB 15℃ 20℃ 25℃ -25℃ 1327 1204 1180 -20℃ 1475 1344 1327 -15℃ 1593 1484 1416 -10℃ 2448 2238 2064 -7/-8℃...
  • Page 48 Capacity 11.4 Power consumption value -temperature curves AS26TB1HRA 1U26BA1ERA performance curves power consumption value-temp.table indoor temp.(humidity 46%) outdoor temp. DB/WB ℃ ℃ ℃ -25℃ -20℃ ℃ ℃ -7/-8 ℃ 1075 ℃ 1046 ℃ 12/11 ℃ ℃ 18/16 ℃ 24/20 heating capacity and indoor/outdoor temp.curves ·...
  • Page 49 capacity 11.5 Cooling discharge pressure curves AS26TB1HRA 1U26BA1ERA performance curves cooling discharge pressure.table outdoor temp. indoor temp. (humidity 46%) DB/WB 21/15℃ 27/19℃ 32/23℃ -15℃ 1996 2082 2152 -10℃ 2047 2139 2210 0℃ 2103 2168 2288 10℃ 2135 2196 2308 20℃ 2190 2282 2397...
  • Page 50 Capacity 11.6 Cooling suction pressure curves AS26TB1HRA 1U26BA1ERA performance curves cooling suction pressure.table outdoor temp. indoor temp. (humidity 46%) DB/WB 21/15℃ 27/19℃ 32/23℃ -15℃ -10℃ 0℃ 10℃ 20℃ 1005 25℃ 1015 30℃ 1026 35℃ 1047 40℃ 1001 1151 1131 1324 46℃...
  • Page 51 Capacity 11.7 Heating discharge pressure curves AS26TB1HRA 1U26BA1ERA performance curves Heating discharge pressure.table indoor temp. outdoor temp DB/WB 15℃ 20℃ 25℃ -25℃ 2117 2246 2339 2253 2374 2455 -20℃ 2329 2470 2596 -15℃ -10℃ 2505 2663 2772 2890 3048 3136 -7/-8℃...
  • Page 52 Capacity 11.8 Heating suction pressure curves AS26TB1HRA 1U26BA1ERA performance curves heating discharge pressure.table outdoor temp indoor temp. DB/WB 15℃ 20℃ 25℃ -25℃ -20℃ -15℃ -10℃ -7/-8℃ 2/1℃ 7/6℃ 12/11℃ 1033 1069 1087 18/16℃ 24/20℃ 1219 1255 1273 HEATING SUCTION PRESSURE 1400 1300 1200...

  • Page 53: Sound Level

    Sound Level 1U26BA1ERA Octave band center frequency (Hz) Octave band center frequency (Hz)

  • Page 54: Circuit Diagrams

    Circuit diagrams 13 Circuit diagrams 13 .1 Outdoor unit control board Circuit Diagrams R 201 LED3 220K-2W C N50 1N4007(1A-1000V) R LS4148 C N9 HEAT1 HEAT2 B 2P3-VH C N7 C N6 C N10 C N48 C N49 AC -N D250 C N11 D250...
  • Page 55 Circuit diagrams 13 .2 Module board Circuit Diagram 47Ω-1/4W +12V L7805CV 102-100V G-TRAS-2-100/5/12/15-T357J-PC40-BCK2235 INPUT OUTPUT MBR3100 TVS1 CY11 PTVS5VOS1UR(5V-400W- 472-1KV 470uF-25V-105? 100uF-16V 100nF 1K-1/2W C300 +5VD 100nF ER106 10nF/630V DM20HR 1N5948B(91V-3W) R13 R14 C7 R24 MBR1100 20uH/2A 470uF-25V-105? 5.1K±1% 100uF-16V 100nF 47Ω-1/4W +15V...
  • Page 56 Circuit diagrams Sincere Forever Haier Group Edited by : Zou Na Haier Industrial Park, No.1, Haier Road 266101, Qingdao, China_ Signed by : Zhang junyan Http：//www.haier.com He shiquan Approved by: Domestic air conditioner...

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