Haier AS26NC2HRA Service Manual
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Haier AS26NC2HRA 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.
AS26NC2HRA
AS35NC2HRA
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 2016-05-12
Domestic air conditioner

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Summary of Contents for Haier AS26NC2HRA

  • 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...

  • Page 2: Table Of Contents

    Table fo contents Contents 1. Introduction .................... 3 2. Features ....................3 3. Specifications ..................3 4. Sensors list .................... 3 5. Piping diagrams ..................3 6. Printed Circuit Board Connector Wiring Diagram ......... 11 7. Functions and Control ................16 8.

  • Page 3: Introduction

    Introduction 1 Introduction 1.1 Model name explanation Apply toT1; 220~240V50HZ/1ph DC inverter Heat pump & R410A refrigerant Version number Super-match range Platform of indoor units: N (N platform) Nominal cooling capacity (2600W) Type of indoor unit: S (wall-mounted) Indoor unit Apply toT1;...
  • 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 4 Fan setting :Select the fan speed LO,MED,HI,AUTO Anti-mold filter: Catches most small particles and remove unpleasant odors effectively. Sleep mode: The setting temperature and the indoor noise can be adjusted to a more comfortable level when you set the “sleep mode” during night sleep. 24Hour timer: Use the timer function to set on,or off,or from on to off,or from off to on Auto restart: Automatic return to previous operation conditions after sudden power blackout Easy clean design: The panel is easy to wash and the airflow vents can be detached easily...
  • Page 10 Specifications 3 Specifications-AS26NC1HRA NOMINAL DISTRIBUTION SYSTEM VOLTAGE NOMINAL CAPACITY and NOMINAL INPUT n i l Capacity rated Btu/h 9000 11800 Power Consumption(Rat -³ ³ TECHNICAL SPECIFICATIONS × × × × Sound pressure(high/medium/low) 38/33/29 Sound level Sound power(high/medium/low) Domestic air conditioner...

  • Page 11: Specifications

    Specifications TECHNICAL SPECIFICATIONS-PARTS cooling heating Type Cross flow fan Motor output Air flow rate(high) m³/h Speed(super/high/low) 1050/900/750 1000/850/700 Type ML fin- 7HI-HX tube Heat exchanger Segment *stage*fitch 3*14*1.4 Air direction control Right,Left,Horizontal,Downward Removable/Washable/Mildew Proof Air filter Microcomputer Control Temperature control Remote controller model YR-HB01 Note: the data are based on the conditions shown in the table below...
  • Page 12 Specifications 3 Specifications-AS35NC1HRA NOMINAL DISTRIBUTION SYSTEM VOLTAGE NOMINAL CAPACITY and NOMINAL INPUT n i l 3.5(1.2-4.3) 4.0(1.3-5.8) Capacity rated Btu/h 12000(4100-14680) 13650(4430-19800) Power Consumption(Rat ³ ³ TECHNICAL SPECIFICATIONS × × × × Sound pressure(high/medium/low) 38/33/29 Sound level Sound power(high/medium/low) Domestic air conditioner...
  • Page 13 Specifications TECHNICAL SPECIFICATIONS-PARTS n i l Air flow rate(high) m³/h Speed(super/high/low) 1050/900/750 1000/850/700 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 14: Piping Diagrams

    Piping diagrams 5 Pinping diagrams Electronic expansion valve Electronic expansion valve Domestic air conditioner...

  • Page 15: Printed Circuit Board Connector Wiring Diagram

    Connector Wiring diagrams 6. Printed Circuit Board Connector Wiring Diagram PCB (1) (Indoor control PCB) Series PCB connector Connect with load CN21 Connector for power N and L CN52 CN27 Connector for ground Connector for communication between indoor and outdoor CN23 unit Connector for thermistors...
  • Page 16 Connector Wiring diagrams CN51 CN34 CN23 CN21 CN52 CN27 Domestic air conditioner...
  • Page 17 Connector Wiring diagrams Fan motor Ion generator Fresh air ire controller Up-down stepmotor left stepmotor Room card Wifi EMERGENCY SWITCH RECEIVER DISPLAY AMBIENT TEMP SENSOR PIPING TEMP SENSOR Right stepmotor Domestic air conditioner...

  • Page 18: 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 19 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 20 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 21 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 22 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 23 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 24 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 25 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% Max.(K )
  • Page 26 Functions and Control 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 23.0284 21.8398 20.6939 -1.18 1.14 21.9714 20.8659 19.7982 -1.15 1.12 20.9688 19.9409 18.9463 -1.13 1.09...
  • Page 27 Functions and Control 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 3.9206 3.6943 3.4780 -1.74 1.66 3.7878 3.5654 3.3531 -1.78 1.70...
  • Page 28 Functions and Control 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 1.0030 0.9061 0.8179 -3.85 3.51...

  • Page 29: System Configuration

    System configuration 8 System 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 30: Dimensional Drawings

    Seivice diagnosis 9.Dimensional drawings-AS26/35NC1HRA unit:mm 10.Center of gravity unit:mm 307.5 Domestic air conditioner...

  • Page 31: 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 32 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 53 Outdoor outdoor units Room temperature sensor failure Page 43 Indoor Malfunction Heat-exchange sensor failure...
  • Page 33 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 34 Seivice diagnosis 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 35 Seivice diagnosis 11.4.3 Indoor AC fan motor malfunction Indoor Display Method of The fan speed detected by the Hall IC during fan motor running which is used to determine the fan motor operating malfunction detection Malfunction When there is no fan speed feedback signal within 2 minutes detection Operation halt due to breaking of wire inside the fan motor.
  • Page 36 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 DC fan motor protection dues to the DC fan motor faulty Supposed causes...
  • Page 37 Seivice 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 38 Seivice diagnosis 11.4.5 IPM protection Outdoor diplay LED1 flash 2 times Method of IPM protection is detected by checking the compressor running condition and so on malfunction 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 39 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 40 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 41 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 42 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 43 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 44 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 45 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 46 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 47: Circuit Diagrams

    Circuit diagrams 12. Circuit diagrams Domestic air conditioner...
  • Page 48 Circuit diagrams Domestic air conditioner...
  • Page 49 Circuit diagrams Sincere Forever Haier Group Edited by : Zou Na Haier Industrial Park, No.1, Haier Road 266101, Qingdao, China_ Signed by : Shen Weijie Http //www.haier.com Approved by: He Shiquan Domestic air conditioner...
  • Page 50 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...
  • Page 51 Removal of procedure 1.Removal of Air Filter Domestic Air Condition...
  • Page 52 Removal of procedure Please embed the air filters into the unit along the grooves as installation. Please embed the two hooks on air filter completely into the unit during installation. Domestic Air Condition...
  • Page 53 Removal of procedure 2.Removal of front panel until it is on the horizontal position, and then release the pivots on both sides of the unit to remove the front panel. Please close the panels before start the removal procedure of front grille. one side to another to release each axis.
  • Page 54 Removal of procedure HOOKS three Domestic Air Condition...
  • Page 55 Removal of procedure 3.Removal of horizontal flap flap flap flap flap Domestic Air Condition...
  • Page 56 Removal of procedure 4.Removal of Drain pan Domestic Air Condition...
  • Page 57 Removal of procedure 5.Removal of vertical blades and swing motor Domestic Air Condition...
  • Page 58 Removal of procedure 6.Removal of Electrical Box Domestic Air Condition...
  • Page 59 Removal of procedure 7.Removal of Heat Exchanger Domestic Air Condition...
  • Page 60 Removal of procedure Domestic Air Condition...
  • Page 61 Removal of procedure 8.Removal of Fan Rotor and Motor Domestic Air Condition...
  • Page 62 Removal of procedure Domestic Air Condition...

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N-seriesAs35nc2hra

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