Haier AS71S2SF1FA-BC Service Manual
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Haier AS71S2SF1FA-BC Service Manual

Wall mounted type dc inverter
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SERVICE MANUAL
Wall Mounted Type
DC Inverter SUPER MATCH
Model No.
AS71S2SF1FA-BC
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
All rights reserved. Unauthorized copying and distribution is a violation of law
Version V1
Date 2019-01-07

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Summary of Contents for Haier AS71S2SF1FA-BC

  • Page 1 Wall Mounted Type DC Inverter SUPER MATCH Model No. AS71S2SF1FA-BC 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.

  • Page 2: Table Of Contents

    Table of contents Contents 1. Introduction .................... 1 2. Features ....................7 3. Specifications ..................8 4. Sensors list.................... 9 5. Piping diagrams ..................10 6. Printed Circuit Board Connector Wiring Diagram........11 7. Functions and Control ................8. Dimensional drawings ................9.

  • Page 3: Introduction

    Introduction 1 Introduction 1.1 Model name explanation Self-Cleaning Black 220~240V50HZ/1ph R32 refrigerant version 1 Platform of indoor units: F (F platform) Supermatch second generation normal efficiency Nominal cooling capacity (24000BTU/h) Type of indoor unit: S (wall-mounted) Indoor unit 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 Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site, to prevent electrical shocks. 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.
  • 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: Features

    Specifications 2.Features Super quiet: Lower noise operation condition A-PAM DC inverter:With adoption of S-TYPE,S-PAM and PHASE control technology to works more stably at low-frequency,and is more energy-saving,mor powerful at high frequency. Long distance air supplying:The indoor unit is improved by optimized motor,fan and air duct so as to provide long distance airflow with 12m + maximum.

  • Page 10: Specifications

    Specifications 3. Specifications NOMINAL DISTRIBUTION SYSTEM VOLTAGE NOMINAL CAPACITY and NOMINAL INPUT n i l 7.0(2.2-7.5) 8.0(2.4-8.5) Capacity rated Btu/h 23890(7510-25600) 27300(8190-29000) 2.17 2.16 1959 ³ 2.8*10 ³ TECHNICAL SPECIFICATIONS 1126*230*337 Packaged Dimensions 1187*301*417 Black Sound pressure(Hi/Mid/Lo/Si) dB(A) 47/43/37/33 Sound level dB(A) Sound power(high) Domestic air conditioner...

  • Page 11: Sensors List

    Specifications TECHNICAL SPECIFICATIONS-PARTS cooling heating Air flow rate(high) m³/h 1100 1000/850/700 Speed(Hi/Mid/Lo) 1100/950/800 Type ML fin- 7HI-HX tube Heat exchanger c t i Removable/Washable/Mildew Proof Air filter Microcomputer Control Temperature control 0010402886W l l o Note: the data are based on the conditions shown in the table below Conversation formulae n i l Kcal/h= KW×860...

  • Page 12: Piping Diagrams

    Piping diagrams 5 Piping diagrams Expansion valve Expansion valve Domestic air conditioner...

  • Page 13: Printed Circuit Board Connector Wiring Diagram

    2) SW2 1 Select remote code A or B, 2 Select room card able or disable 3,4 Select 23 26 33 and 35 , 3) RV1 Varistor0 4) FUSE1 Fuse 3.15A/250VAC N-RC UNIT MODEL PCB MODEL AS71S2SF1FA-BC 0011800593A（26） DISPLAY SERIES 325/498 UNIT MODEL DISPLAY MODEL AS71S2SF1FA-BC...
  • Page 14 CN11’ ‘’’ CN5’ CN14 CN51 CN34 CN36 CN15 CN23 CN21 CN52 D omestic air conditioner...
  • Page 15 Wiring Diagrams Wiring Diagrams W IRED CONTROLLER WIFI SWITCH CN14 UP-DOWN STEPMOTOR LEFT- RIGHT STEPMOTOR Domestic air conditioner...

  • Page 16: Functions And Control

    Functions and Control 7.Funcitions and Control 7.1 Main functions and control specification 7.1.1 Automatic operation When the running mode is turned to automation after starting the system, the system will first determine the running mode according to the current room temperature and then will run according to the determined mode.
  • Page 17 Functions and Control Control feature: send the dehumidifying signal to the outdoor system. When Tr>Ts+2℃, the compressor will be turned on, the indoor fan will operate at the set speed. When Tr is between the Ts and Ts+2℃, the outdoor system will operate at the high dehumidifying frequency for 10 minutes and then at the low dehumidifying mode for six minutes.
  • Page 18 Functions and Control 7.1.4 Heating operation mode. * temperature control range: 16---30℃ * temperature difference: ±1℃ * control feature: the temperature compensation is automatically added and the system will send the heating signals to the outdoor system. If Tr+0.5℃≤Ts, the outdoor compressor is turned on, the indoor fan will be at the cold air proof mode. If Tr>Ts+1.5℃, the outdoor system is turned off, the indoor fan will be at the heat residue sending mode.
  • Page 19 Functions and Control Send strength operation signal to the outdoor system. The mode change finishes the strength operation. Entering ‘mute’, you can have normal operation or signal control such as timing to finish the strength operation. When the system is at the automatic option with the strength/ mute function, if the system enters the cooling mode, the cooling strength/ mute function will be offered;...
  • Page 20 Functions and Control operations, the set temperature will be raised for 1 centigrade and the system will keep this status for 3 hours and then close down. 2.3 During the dormant time, except the change of the system mode or a new press on the dormant setting keys, the timing of the 8 hours dormancy will take the first timing as the start time, any presses on other keys will not affect the original timing.
  • Page 21 Functions and Control 7.1.12 High load protection control The outdoor system will be stopped if the coil temperature is above 63℃ for 2 minutes. The indoor fan will be controlled by the thermostat. The outdoor system can be restarted when the coil temperature is below 45℃...
  • Page 22 Functions and Control 7.1.16 Single indoor system operation * Enter condition: First, set the high speed airflow and 30 centigrade set temperature, then press the dormant keys for 6 times within 7 seconds, the system will feedback with 6 rings. * After the system enters the separate indoor system operation mode, the indoor system will operate according to the set mode and neglect the communication signals of the outdoor system.
  • Page 23 Functions and Control 7.2 Value of thermistor Room sensor and Pipe Sensor Room sensor R25℃=23KΩ±2% B25℃/50℃=4200K±1% R25℃=23KΩ+2% Temp.(℃) Resistor（KΩ） Temp.（℃） Resistor（KΩ） Temp.（℃） Resistor（KΩ） 266.905 32.215 250.866 30.671 5.87 235.895 29.21 5.65 221.911 27.828 5.44 208.838 26.521 5.24 196.609 25.283 5.04 185.163 24.111 4.86...
  • Page 24 Functions and Control R25℃=10KΩ±2% B25℃/50℃=3700K±2% Temp.((℃)) Tolerance(℃) Max.(KΩ) Normal(KΩ) Min.(KΩ) 165.2170 147.9497 132.3678 -1.94 1.75 155.5754 139.5600 125.0806 -1.93 1.74 146.5609 131.7022 118.2434 -1.91 1.73 138.1285 124.3392 111.8256 -1.89 1.71 130.2371 117.4366 105.7989 -1.87 1.70 122.8484 110.9627 100.1367 -1.85 1.69 115.9272 104.8882 94.8149...
  • Page 25 Functions and Control 19.1149 18.2270 17.3646 -1.08 1.05 18.2580 17.4331 16.6305 -1.06 1.03 17.4442 16.6782 15.9315 -1.03 1.01 16.6711 15.9601 15.2657 -1.01 0.99 15.9366 15.2770 14.6315 -0.98 0.96 15.2385 14.6268 14.0271 -0.96 0.94 14.5748 14.0079 13.4510 -0.93 0.92 13.9436 13.4185 12.9017 -0.91 0.90...
  • Page 26 Functions and Control 3.4195 3.2085 3.0079 -1.91 1.82 3.3060 3.0989 2.9021 -1.95 1.85 3.1969 2.9935 2.8005 -2.00 1.89 3.0919 2.8922 2.7029 -2.04 1.93 2.9909 2.7948 2.6092 -2.08 1.97 2.8936 2.7012 2.5193 -2.13 2.01 2.8000 2.6112 2.4328 -2.17 2.05 2.7099 2.5246 2.3498 -2.22 2.09...
  • Page 27 Connector Wiring diagrams 0.8983 0.8088 0.7275 -4.07 3.69 0.8741 0.7863 0.7067 -4.12 3.74 0.8507 0.7646 0.6867 -4.18 3.78 0.8281 0.7436 0.6672 -4.23 3.83 0.8061 0.7233 0.6484 -4.29 3.88 0.7848 0.7036 0.6303 -4.34 3.92 0.7641 0.6845 0.6127 -4.40 3.97 0.7441 0.6661 0.5957 -4.46 4.02...

  • Page 28: Dimensional Drawings

    Seivice diagnosis 8.Dimensional drawings 1126 89.2 462.8 89.2 9.Center of gravity unit:mm 1126 Domestic air conditioner...

  • Page 29: 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 30 Service diagnosis 10.3 Error Codes and Description indoor display Code indication Indoor displaying panel code indication Outdoor Reference fault description (LED1 Only For 498 and Page flash Other 498A display times) display (Red/Green Time Run □On ★Flash ■Off ,) Indoor and Communication fault Outdoor...
  • Page 31 Installations 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 32 Installations 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 33 Installations 10.3.3 Indoor 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 Causes...
  • Page 34 Installations 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. well R emove fan m otor af te r s witch off the power.Measure the resistances...
  • Page 35 Installations Supposed ■ IPM protection dues to the compressor faulty Causes ■ IPM protection dues to faulty PCB of IPM module ■ Compressor wiring disconnected Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, else parts damage may be occurred.
  • Page 36 Installations Electrify the machine again and turn it on with the remote controller, If malfunctions IPM Module is damaged and are reported before or upon the compressor needs replacing. being started up, The compressor is started normally, but malfunctions are reported after it has Repair the power supply run for some time.
  • Page 37 Installations 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 Decision...
  • Page 38 Installations 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 39 Installations 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 40 Installations 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 41 Installations 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 42 Table of Contents 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 43: Wiring Diagrams

    Table of Contents 11. Wiring diagrams 11.1 INDOOR UNIT 0010593412 INDOOR UNIT DIAGRAM DC FAN MOTOR AMBIE NT TE MP.S E NS OR PIPING TE MP.S E NS OR DIS PLAY BOARD CN36 CE NTRAL CONTROLLE R CN21 IRE D CONTROLLE R CN52 CN15 HU NAM S E NS OR...
  • Page 44 Circuit diagrams 11.2 Circuit Diagrams B5B-PH-K-S FJ-fb beep0/INT6/P140 NetLabel238 P60/SCLA0 beep1/INT7/P141 P61/SDAA0 TI00/P00 3-1-N TO00/P01 NetLabel242 TXD1/AN17/P02 3-41-COMM_TX BUZZ P31/INT4/TI03/TO03/beep0 sda10/RXD1/AN16/P03 3-40-COMM_RX DSTEP_A P77/INT11/TXD2 SCL10/SCK10/P04 DSTEP_B NetLabel239 P76/INT10/RXD2 P130(out) DSTEP_C ROOM P75/INT9/scl01 AVREFP/AN0/P20 DSTEP_D BM(ad) P74/INT8/sda01 AVREFM/AN1/P21 USTEP_A 25/35 P73/KR3 AN2/P22 USTEP_B P72/KR2...
  • Page 45 Circuit diagrams 11.2 Circuit Diagrams 1N5399(1500mA/1000V) 1N5399(1500mA/1000V) 100uF/450V 470nF/275V 10nF/630V D/ST D/ST ℃ 22uF-50V-105 FR106(1A-600V-500ns) ℃ 47uF-50V-105 ℃ 470uF-25V-105 1N4746A(18V-1W) MBR1100(1A-100V) Domestic air conditioner...
  • Page 46 Circuit diagrams 11.2 Circuit Diagrams WIRED RLS4148 100K-1/4W Domestic air conditioner...
  • Page 47 Wall Mounted Type DC Inverter FREE MATCH F -Series ● SERIES: 70F...
  • Page 48 Remove of front panel Indoor unit Step Procedure Points ● 1.Features 2.Remove the front panel ● Hold the front panel by the tabs on the both sides and lift it until it stops with a click. Loosen the screw and lift up the casing cover Loosen the screw and ●...
  • Page 49 Step Procedure Points Pull the wires out of the control box and then release the pivots on both sides of the unit to remove the front ● panel. Remove the air filters and horizontal flap ● Step Procedure Points Lift the first air filter upwards slightly and then pull it out downwards...
  • Page 50 Remove the casing Step Procedure Points Release the screw ■ lift up the screw covers(3EA) covers and then release them. Loosen the marked ● screw (7EA)
  • Page 51 Step Procedure Points HOLE (4EA) ■When assembling, install the front Release the marked grille horizontally hooks (4EA) and then so as not to stuff Pull the front grille out the flap inside. ● ■When assembling, Horizontally and remove it make sure the four ●...
  • Page 52 Release stepping motor and the control box Step Procedure Points Loosen the stepping motor screws (4EA) and then remove the ● stepping motor Remove the control box ● Loosen the control Box screws (1 ● and then pull it.
  • Page 53 Removal of Heat Exchanger Step Procedure Points Loosen the marked screws(2EA) Pull mounting plate and heat exchanger bracket, and then release them. Release fixture plate from the base Frame hook and remove it. Loosen the screws ●...
  • Page 54 Step Procedure Points Remove the heat Exchanger Remove Fan motor Loosen the marked screws(4EA) and release the cover of fan motor Loosen the marked screw (1EA) and remove fan motor Lift up the fan and ● remove it...

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