Haier AS24NS2HRA Service Manual
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Haier AS24NS2HRA Service Manual

Wall mounted type dc inverter free match
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SERVICE MANAUL
Wall Mounted Type
DC Inverter FREE MATCH N-Series
Model No.
AS24NS2HRA
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
2013 (Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. Unauthorized copying and distribution is a violation of law
Haier Group
Version V1
Date 2014-01-16

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Summary of Contents for Haier AS24NS2HRA

  • Page 1 Repair the product or products dealt with in this service information by anyone else could result in serious injury or death 2013 (Qingdao Haier Air Conditioner General corp. , Ltd) All rights reserved. Unauthorized copying and distribution is a violation of law...

  • Page 2: Table Of Contents

    Table fo 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. System configuration................9. Dimensional drawings ................10.

  • Page 3: Introduction

    Intuoduction 1 Introduction 1.1 Model name explanation Apply toT1; 220~240V50HZ/1ph DC inverter Heat pump & R410A refrigerant Version number 70N Platform Platform of indoor units: N (N platform) Nominal cooling capacity (24000BTU/h) Type of indoor unit: S (wall-mounted) Indoor unit 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 to serious accidents under some conditions if they are not followed.
  • Page 5 Intuoduction 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 Intuoduction 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 Intuoduction 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 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. 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: 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 cooling heating 7.0(2.0-7.3) 7.5(2.5-7.8) Capacity rated Btu/h 23890(6380-24910) 25600(8530-26620) Power Consumption(Ra 2.18 2.20 1979 ³ 2.8*10 ³ TECHNICAL SPECIFICATIONS 1115 × × 1205 × × Sound dB(A) 48/44/38 47/43/37 peessure(high/medium/low) Sound level...

  • Page 11: Sensors List

    Specifications TECHNICAL SPECIFICATIONS-PARTS cooling heating Air flow rate(high) m³/h 1200 1200 Speed(high/middle/low) 1000/900/800 900/ 800/700 Type ML fin- 7HI-HX tube Heat exchanger c t i t,Left,Horizontal,Downward Air filter Removable/Washable/Mildew Proof 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 Pinping diagrams Domestic air conditioner...

  • Page 13: Printed Circuit Board Connector Wiring Diagram

    Connector Wiring diagrams 6. Printed Circuit Board Connector Wiring Diagram Connectors PCB(1) (Control PCB) Connector for fan motor Connector for heat exchanger thermistor and Room temperature thermistor Connector for UP&DOWN STEP motor CN21 Connector for power N wire CN52 Connector for power L CN27 Connector for power GRN Connector for display board...
  • Page 14 Connector Wiring diagrams PCB(1) CN34 CN14 CN52 CN21 CN27 Domestic air conditioner...
  • Page 15 Connector Wiring diagrams Wiring diagrams 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. Tr in the following selection conditions means room temperature, Ts means setting temperature, Tp means temperature of indoor coil pipe Tr≥23...
  • Page 17 Functions and Control 7.1.3 Demoisture mode. * temperature control range: 16---30 ±1 * temperature difference: Control feature: send the demoisture 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 demoisture frequency for 10 minutes and then at the low demoisture mode for six minutes.
  • Page 18 Functions and Control *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. When Tr> Ts+2 , low speed. When the airflow speed has no delay from the high to low switching, the speed should be delayed for 3 minutes (remain at high speed for 3 minutes.) before the next switch.
  • Page 19 Functions and Control 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 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 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. The malfunction will be stored in the malfunction resume and will not be revealed. 7.1.13 Abnormal operation of indoor system When the outdoor system operates, if the indoor system operation differs from the outdoor system, the abnormal operation malfunction will be reported.
  • Page 22 Functions and Control 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. However, it has to send signals to the outdoor system.
  • Page 23 Functions and Control 7.1.20 Time cutting function: Connect the test program terminal on the mainboard after connecting the system to the power circuit. The CPU of the main control will be 60 times faster. 7.2 Value of thermistor Room sensor and Pipe Sensor R25 =10K B25 /50 =3700K 3% Temp.(( ))
  • Page 24 Functions and control 43.5912 40.5800 37.7429 -1.47 1.39 41.4249 38.6207 35.9739 -1.45 1.37 39.3792 36.7676 34.2983 -1.43 1.35 37.4465 35.0144 32.7108 -1.41 1.33 35.6202 33.3552 31.2062 -1.38 1.31 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...
  • Page 25 Functions and control 6.0170 5.7454 5.4812 -1.25 1.22 5.7997 5.5316 5.2712 -1.29 1.25 5.5914 5.3269 5.0704 -1.33 1.29 5.3916 5.1308 4.8783 -1.37 1.33 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...
  • Page 26 Functions and control 1.3730 1.2525 1.1415 -3.27 3.01 1.3335 1.2153 1.1066 -3.32 3.06 1.2953 1.1794 1.0730 -3.38 3.10 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...

  • Page 27: System Configuration

    System configuration 8 System configuration 8.1System configuration After the installation and test operation of the room air conditioner have been completed, it should be operated and handled as described below. Every user would like to know the correct method of operation of the room air conditioner, to check if it is capable of cooling(or heating) well, and to know a clever method of using it.
  • Page 28 System configuration Parts and Functions Indoor Unit Remote controller Additional functions display Supplemented electrical Operation mode QUITE SLEEP HEALTH POWER heating Inlet Air Purifying Filter Remote controller (inside) 9. QUIET button 10. HEAT button 11. COOL button Inlet grille 12. AUTO button 13.
  • Page 29 System configuration Operation Emergency operation and test operation Unit start / stop Emergency Operation: Use this operation only when the remote controller is defective or lost, and with function of emergency running, air conditoner can run automatically for a while. Remote controller When the emergency operation switch is pressed, the "...
  • Page 30 System configuration Operation Sleep Operation 4. In FAN mode It has no SLEEP function. Press button to enter additional options, when 5.Set the wind speed change when sleeping cycle display to will flash. And then press If the wind speed is high or middle before setting for the enter to sleep function.
  • Page 31 System configuration EUROPEAN REGULATIONS Operation CONFORMITY FOR THE MODELS Timer On/Off On-Off Operation All the products are in conformity with the following European provision: 1.After unit starts, select your desired operation mode. 2.Press TIMER button to change TIMER mode. Every - Low Voltage Directive 2006/95/EC time the button is pressed, display changes as follows: Remote controller:...
  • Page 32 System configuration Maintenance For Smart Use of The Air Conditioner Remote Controller Indoor Body Setting of proper room Do not block the air inlet temperature or outlet Proper wipe the air conditioner by using a temperature soft and dry cloth.For serious stains, use a neutral detergent diluted with Do not usewater,wipe the controller water.Wring the water out of the...
  • Page 33 System configuration Cautions WARNING Please call Sales/Service Shop for the Installation. Do not attempt to install the air conditioner by yourself because improper works may cause electric shock, fire, water leakage. WARNING Check proper When abnormality such as burnt-small found, Use an exclusive immediately stop the operation button and installation of the...
  • Page 34 System configuration Trouble shooting Cautions Before asking for service, check the following Do not obstruct or cover the ventilation grille of the air first. or any other things into the conditoner.Do not put fingers inlet/outlet and swing louver. This appliance is not intended for use by persons (including children) Phenomenon Cause or check points with reduced physiced, sensory or mental capabilities or lack of...

  • Page 35: Dimensional Drawings

    Seivice diagnosis 9.Dimensional drawings 1115 10.Center of gravity 1115 477.30 106.50 Domestic air conditioner...

  • Page 36: Service Diagnosis

    Seivice diagnosis 11 Service Diagnosis 11.1 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 37 Seivice diagnosis 11.4 Error Codes and Description indoor display Code indication Indoor Reference Outdoor fault description displaying Page (LED1 flash panel code times) indication Indoor and Communication fault between indoor and Page . Outdoor outdoor units Room temperature sensor failure Page .
  • Page 38 Seivice diagnosis 11.4.1 Thermistor or Related Abnormality E1: Room temperature sensor failure Indoor display E2: Heat-exchange sensor failure LED1 flash 10 times Defrost temperature sensor failure LED1 flash 11 times Suction temperature sensor failure Outdoor display LED1 flash 12 times Ambient temperature sensor failure LED1 flash 13 times Discharge temperature sensor failure The temperatures detected by the thermistors are used to determine thermistor errors Method of...
  • Page 39 Seivice diagnosis 11.4.2 EEPROM abnormal Indoor Display E4: indoor EEPROM error outdoor display F12: Outdoor EEPROM error; Outdoor LED1 flash 1 times Method of malfunction The Data detected by the EEPROM are used to determine MCU detection Malfunction when the data of EEPROM is error or the EEPROM is damaged detection conditions ■Faulty EEPROM data...
  • Page 40 Seivice diagnosis 11.4.3 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 when the detected rotation feedback singal don’t receiced in 2 minutes Malfunction Decision Conditions...
  • Page 41 Seivice diagnosis Turn off power supply and rotate fan by hand Does fan rotate Replace fan motor smoothly? Turn power ON and operate fan Turn off power supply and disconnect fan Does it rotate? motor connector, then turn power ON Check output of fan motor connector Is motor power voltage DC310V...
  • Page 42 Seivice diagnosis 11.4.4 Outdoor DC fan motor fault Outdoor diplay LED1 flash 9 times Method of DC fan motor is detected by checking the fan running condition and so on malfunction detection Malfunction detection when the data of EEPROM is error or the EEPROM is damaged conditions ■...
  • Page 43 Seivice diagnosis 11.4.5 IPM protection Outdoor diplay LED1 flash 2 times Method of malfunction IPM protection is detected by checking the compressor running condition and so on detection ■The system leads to IPM protection due to over current Malfunction ■The compressor faulty leads to IPM protection detection ■circuit component of IPM is broken and led to IPM protection conditions...
  • Page 44 Seivice diagnosis 11.4.6 Over-current of the compressor LED1 flash 3 or 24 or 25 times Outdoor diplay Method of he current of the compressor is too high malfunction detection when the IPM Module is damaged or the compressor is damaged. power supply Malfunction detection voltage is too low or too high...
  • Page 45 Seivice diagnosis 11.4.7 The communication fault between IPM and outdoor PCB LED1 flash 4 times Outdoor diplay Method of Communication is detected by checking the IPM module and the outdoor PCB malfunction detection ■The outdoor PCB broken leads to communication fault Malfunction detection ■The IPM module broken leads to communication fault conditions...
  • Page 46 Seivice diagnosis 11.4.8 Power Supply Over or under voltage fault LED1 flash 6 times The power supply is over voltage Outdoor diplay Method of An abnormal voltage rise or fall is detected by checking the specified voltage detection malfunction detection Malfunction detection An voltage signal is fed from the voltage detection circuit to the microcomputer conditions...
  • Page 47 Seivice diagnosis 11.4.9 Overheat Protection For Discharge Temperature Outdoor diplay LED1 flash 8 times Method of The Discharge temperature control is checked with the temperature being detected by malfunction detection the Discharge pipe thermistor when the compressor discharge temperature is above 110 Malfunction detection conditions ■Electronic expansion valve defective...
  • Page 48 Seivice diagnosis 11.4.10 The communication fault between indoor and outdoor indoor diplay Outdoor diplay LED1 flash 15 times Method of Communication is detected by checking the indoor PCB and the outdoor PCB malfunction detection ■The outdoor PCB broken leads to communication fault Malfunction detection ■The indoor PCB broken leads to communication fault conditions...
  • Page 49 Seivice 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 50 Circuit diagrams 11.4.11 Loss of synchronism detection Inverter side current detection is abnormal Outdoor diplay LED1 flash 18 times LED1 flash 19 times Method of The position of the compressor rotor can not detected normally malfunction detection when the wiring of compressor is wrong or the connection is poor; or the compressor Malfunction detection is damaged conditions...
  • Page 51 Circuit diagrams 11.4.12 High work-intense protection Outdoor diplay LED1 flash 21 times Method of High work-intense control is activated in the heating mode if the temperature being malfunction detection sensed by the heat exchanger thermistor exceeds the limit. Activated when the temperature being sensed by the heat exchanger rises above Malfunction detection twice in 30 minutes.

  • Page 52: Circuit Diagrams

    Circuit diagrams 12. Circuit diagrams +12V 100nF FLZ1 CN10 HXF1 100nF R103 20K R104 2K 25/35 NDI-04H R102 B5B-XH-A +12V R109 24C04 100nF DISPLAY-0011800161 MODE EEPROM B10B-PH-K-S TJC8-04 R85 10K ONLINE TJC8-04 560Ω ROOM SRCK PIPE 4.7uF-50V R27 R28 100nF B4B-XH-A 10nF 10nF...
  • Page 53 Circuit diagrams Sincere Forever Haier Group Edited by : Liu Yujuan Haier Industrial Park, No.1, Haier Road Liu xiang 266101, Qingdao, China_ Signed by : He shiquan Http //www.haier.com Approved by: Wu Hongjin Domestic air conditioner...

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