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Haier AS18TD2HRA Service Manual

Wall mounted type dc inverter
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SE RVICE MANUAL
Wall Mounted Type
DC Inverter
Model No.
AS18TD2HRA
WARNING
This servic e informatio n is designed for experience d repai r technician s only and is not designe d for use by the genera l public.
It doe s not contai n warning s or caution s to advise non-technic al individu als of potentia l dangers in attemptin g to servic e a product.
Product s powered by electricit y shoul d be service d or repaire d only by experience d professiona l technicia ns. Any attemp t to service or
Repai r the produc t or product s deal t with in this servic e infor mation by anyone else could result in seriou s injury or death
201 5 (Qing dao Haie r Air Condi tione r Genera l corp . , Ltd)
All right s reser ved. Unauthoriz ed copying and distributio n is a violati on of law
Haier Group
Version V1
Date 2015-12-05

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Summary of Contents for Haier AS18TD2HRA

  • Page 1 Wall Mounted Type DC Inverter Model No. AS18TD2HRA WARNING This servic e informatio n is designed for experience d repai r technician s only and is not designe d for use by the genera l public. It doe s not contai n warning s or caution s to advise non-technic al individu als of potentia l dangers in attemptin g to servic e 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 Apply toT1; 220~240V50HZ/1ph DC inverter Indoor units Version number 50T Platform Platform of indoor units: T (T platform) Nominal cooling capacity (18000BTU/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

    Features 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: Heating: When -15 can still heating natural heating maintenance:Heating Holding 10 temperature Confortable sleep The setting temperature and the indoor noise can be adjusted to a more comfortable...

  • Page 10: Specifications

    Specifications 3.Specifications NOMINAL DISTRIBUTION SYSTEM VOLTAGE NOMINAL CAPACITY and NOMINAL INPUT n i l 5.0（1.2-6.3） 6.0（1.05-6.7) Capacity rated Btu/h 20470 （ 3580-22860） 17060 （ 4100-21500） 1.54 1.61 1679 ³ 2.0*10 ³ TECHNICAL SPECIFICATIONS 1008*225*318 Packaged Dimensions 1085*329*403 White Sound dB(A) 37/35/28 37/35/28 peessure(Hi/Mid/Lo)

  • Page 11: Sensors List

    Specifications TECHNICAL SPECIFICATIONS-PARTS cooling heating Air flow rate(high) m³/h 900/800/700 Speed(Hi/Mid/Lo) 1000/875/750 Type ML fin- 7HI-HX tube Heat exchanger c t i Removable/Washable/Mildew Proof Air filter Microcomputer Control Temperature control 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 Domestic air conditioner...

  • Page 13: Printed Circuit Board Connector Wiring Diagram

    Functions and control 6.Printed circuit board connector wiring diagram Connectors PCB(1) (Control PCB) For AS18TD2HRA 1) CN9 Connector for fan motor 2) CN6 Connector for heat exchanger thermistor and Room temperature thermistor 3) CN5 Connector for UP&DOWN STEP motor 4) CN11,CN10 Connector for L&R STEP motor...
  • Page 14 Functions and control PCB(1) CN10 CN36 CN34 CN51 CN11 CN23 CN52 CON2 CON1 CON3 CN21 Domestic air conditioner...
  • Page 15 Functions and control Wiring diagrams INDOOR UNIT DC FAN MOTOR Fresh air up-down stepmoter left stepmoter EMERGENCY SWITCH Room card RECEIVER DISPLAY AMBIENT TEMP SENSOR PIPING TEMP SENSOR Right stepmoter 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 7.1.3 Dehumidifying mode. * temperature control range: 16---30 * temperature difference: 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 If Tr<Ts-1, the outdoor system will be turned on again, the indoor fan will be at the cold air proof mode. *Indoor fan control manual control: You can choose high, medium, low and automatic speed control. Automatic: When Tr<Ts, high speed. When Ts Tr Ts+2 , medium speed.
  • Page 19 Functions and control 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; if the system enters the heating mode, then the heating strength/ mute function will be offered;...
  • Page 20 Functions and control 2 centigrade after 1 hour’s operation and will fall 2 centigrade 1 hour later. 3 hours after the preceding operations, the set temperature will be raised for 1 centigrade and the system will keep this status for 3 hours and then close down.
  • Page 21 Functions and control 7.1.12 High load protection control The outdoor system will be stopped if the coil temperature is above 65 for 2 minutes. The indoor fan will be controlled by the thermostat. The outdoor system can be restarted when the coil temperature is below 42 and the system has been stopped for 3 minutes.
  • Page 22 Functions and control can be confirmed and reported and the outdoor system will be stopped. 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 R25 =23K +2% Temp.( ) Resistor K Temp. Resistor K Temp. Resistor K 266.905 39.343 8.39 250.866 37.406 8.05 235.895 35.577 7.73 221.911 33.848 7.43 208.838 32.215 7.14 196.609 30.671 6.86 185.163 29.21 174.443 27.828 6.34 164.399 26.521 154.983 25.283...
  • Page 24 Functions and control R25 =10K B25 /50 =3700K 2% Temp.(( )) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) 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...
  • Page 25 Functions and control 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 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...
  • Page 26 Functions and control 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 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...
  • Page 27 Functions and control 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 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...

  • Page 28: Dimensional Drawings

    Seivice diagnosis 8.Dimensional unit:mm 1008 9.Center of gravity unit:mm 1008 431.5 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 Reference Outdoor fault description displaying Page (LED1 flash panel code times) indication Indoor Communication fault between indoor and Page .39 Outdoor outdoor units Room temperature sensor failure Page 28. Indoor Malfunction Heat-exchange sensor failure Page 28.
  • Page 31 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 32 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 33 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 detected rotation feedback signal don’t received in 2 minutes Decision Conditions Supposed...
  • Page 34 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 35 Service diagnosis Check whether Terminal on the outdoor mainboard is well inserted. Reinsert the terminals Is it normal? Electrify the machine again and turn it on in the Cool state with the remote controller. check whether motor can Measure the voltage between 1 and 3 of the terminal of fan motor on the mainboard about DC310V, Measure the voltage between 3 and 4 of the terminal about DC15V.
  • Page 36 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 The compressor faulty leads to IPM protection Conditions circuit component of IPM is broken and led to IPM protection...
  • Page 37 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. Conditions power supply voltage is too low or too high Supposed...
  • Page 38 Service diagnosis 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 39 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 40 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 41 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 42 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 43 Service diagnosis Check the indoor mainboard. Measure the voltage between Jumpers 3 and 4 of IC1 on the indoor mainboard with a multimeter. Test the outdoor power supply (230VAC and +310VDC) with a multimeter. If the voltage is of a constant value of 0V DCto5V DC If 230VAC is available but 310DC not, the power module is damaged, replace it...
  • Page 44 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 45 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 46: Circuit Diagrams

    Circuit diagrams 11. Circuit diagrams +12V FLZ1 HXF1 TEST 25/35 +12V MODE EEPROM C1 8 100n F ROOM SRCK PIPE DIGH DIGL MODE KI1/AN9/P11 KI2/AN10/P12 P33/SSI DIG_MODE KI3/AN11/P13 P34/SDA/SCS DIGL COM3 MODE (INT2)/P32 MODE DIGH COM2 (INT1)/P36 P43/XCIN +12V TAO/P30 P44/XCOUT TBO/P31 RESET...
  • Page 47 Wiring diagrams +15V +15V D206 100 -1206 100 -1206 15V-100mA ZD003 FR106(1A-600V-500ns) R202 R203 1N4742A(12V-1W) 1N5399 ZD001 C013 310V R206 270 -2W R004 2.2nF-250VAC 47uF-50V-105 1N5399 N001 2.2K-0603 0.1uF +310V 220-L KTC8050 SCK084R72 0.1uF-275VAC 102-1000V R205 1N5399 C002 C009 R019 220-N 560 -0805 47K-2W...
  • Page 48 Sincere Forever Haier Group Edited by : Jing Yanqin Haier Industrial Park, No.1, Haier Road Yang Xiaodong 266101, Qingdao, China_ Signed by : He shiquan Http //www.haier.com Approved by: Wu Hongjin Domestic air conditioner...
  • Page 49 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 50 Removal Procedure Removal 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 Domestic air conditioner...
  • Page 51 Removal Procedure Step Procedure Points Loosen the screw and lift Loosen the screw up the casing cover Loosen the screw and lift up the control box cover Loosen the screw Domestic air conditioner...
  • Page 52 Removal Procedure Remove the air filters and horizontal flap Step Procedure Points Pull the Harness 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 Lift an air filter upwards slightly and then pull it out downwards...
  • Page 53 Removal Procedure Remove the casing Step Procedure Points Release the screw covers(3EA) Loosen the marked Screw (7EA) Domestic air conditioner...
  • Page 54 Removal Procedure Step Procedure Points Holes 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. Horizontally and When assembling, remove it make sure the four hooks are caught properly.
  • Page 55 Removal Procedure Release stepping motor and control box Step Procedure Points Hooks (3EA) Release the top cover of the control box hooks then remove it. Loosen screws (2EA) Pull the Harness out of the PCB unit and then Loosen control Harness: Box screws (2EA) .
  • Page 56 Removal Procedure Release stepping motor and control box Step Procedure Points Loosen the stepping motor screws (2EA), and then Release the stepping motor Domestic air conditioner...
  • Page 57 Removal Procedure Removal of Heat Exchanger Step Procedure Points Loosen the marked screws(2EA) Loosen the Screws (2EA) Pull mounting plate and heat exchanger bracket from Hook of the base frame then release them. Domestic air conditioner...
  • Page 58 Removal Procedure Step Procedure Points Release the fixture plate from the base frame hook and remove it. Domestic air conditioner...
  • Page 59 Removal Procedure Step Procedure Points Loosen the marked screws (7EA). And then Remove the heat exchanger Remove Fan Motor Loosen the marked screws(4EA) and release the cover of fan motor Domestic air conditioner...
  • Page 60 Removal Procedure Step Procedure Points Loosen the marked screw (2EA) of fan motor up bracket and remove it Screw of fan rotor Screw of Fan Motor up bracket Loosen the marked screw (1EA) of fan motor and remove fan motor ove it Fan motor bracket(UP) Fan motor assy...
  • Page 61 Removal Procedure Step Procedure Points Lift up the right part of the fan and remove it Remove horizontal louver and fan motor bracket Every blade go round and round, then move Domestic air conditioner...
  • Page 62 Removal Procedure Remove fan motor bracket and fan bearing Step Procedure Points Pull the hook of fan motor bracket and upward remove it Pull the hook of bearing bracket and upward remove it Domestic air conditioner...
  • Page 63 Removal Procedure Remove frame work board Step Procedure Points Loosen the marked screw of frame work board Screw of frame work board Pull the hook of frame work board, remove it Domestic air conditioner...
  • Page 64 Removal Procedure Remove drain pipe and drain pipe stem Step Procedure Points Loosen the marked screw of drain pipe and then remove it Pull the drain pipe stem from base frame and the remove it Domestic air conditioner...

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