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Domestic air conditioner

SERVICE MANAUL

Wall Mounted Type

DC Inverter FREE MATCH N-Series

AS26NC2HRA

Model No.

AS35NC2HRA

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

WARNING

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

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Summary of Contents for N-Series

Page 1: ...ical 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 WARNING 2016 Qingdao Haier Air Conditioner General corp Ltd All righ...

Page 2: ...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 System configuration 27 9 Dimensional drawings 42 10 Conter of gravity 43 11 Service Diagnosis 44 12 Circuit diagrams 59 ...

Page 3: ...W Platform of indoor units N N platform Super match range Version number Heat pump R410A refrigerant DC inverter Apply toT1 220 240V50HZ 1ph A S 3 5 N C 2 H R A Indoor unit Type of indoor unit S wall mounted Nominal cooling capacity 3500W Platform of indoor units N N platform Super match range Version number Heat pump R410A refrigerant DC inverter Apply toT1 220 240V50HZ 1ph ...

Page 4: ...t before disassembling the equipment for a repair Working on the equipment that is connected to a power supply can cause an electrical shook If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas discharges during the repair work do not touch the discharging refriger...

Page 5: ...ing the welder in an enclosed room can cause oxygen deficiency 1 2 2 Cautions Regarding Products after Repair Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools can cause an electrical shock excessive heat generation or fire When relocating t...

Page 6: ...generation or fire Do not damage or modify the power cable Damaged or modified power cable can cause an electrical shock or fire Placing heavy items on the power cable and heating or pulling the power cable can damage the cable Do not mix air or gas other than the specified refrigerant R 410A R22 in the refrigerant system If air enters the refrigerating system an excessively high pressure results ...

Page 7: ...roperly water can enter the room and wet the furniture and floor 1 2 3 Inspection after Repair Warning Check to make sure that the power cable plug is not dirty or loose then insert the plug into a power outlet all the way If the plug has dust or loose connection it can cause an electrical shock or fire If the power cable and lead wires have scratches or deteriorated be sure to replace them Damage...

Page 8: ...k Be sure to check the drainage of the indoor unit after the repair Faulty drainage can cause the water to enter the room and wet the furniture and floor 1 2 4 Using Icons Icons are used to attract the attention of the reader to specific information The meaning of each icon is described in the table below 1 2 5 Using Icons List Icon Type of Information Description Note Note A note provides informa...

Page 9: ...ean design The panel is easy to wash and the airflow vents can be detached easily Child lock Avoid the child s wrong operation on the remote controller 3D air flow The 3D airflow is able to deliver the airflow horizontally and vertically Auto mode Adjust the last fixed operation mode automatically Power mode Quick cooling or heating Soft mode Lower noise operation condition Intelligent air With tw...

Page 10: ... Power Consumption Rat 8 7 0 62 0 W K d e 4 5 4 29 4 W W P O C S R E E S 671 3 3 5 h W K n o i t p m u s n o c y g r e n e l a u n n A 0 1 2 1 h m l a v o m e R e r u t s i o M TECHNICAL SPECIFICATIONS 0 1 3 5 1 2 0 0 9 m m D W H s n o i s n e m i D 9 9 3 3 1 3 1 9 9 m m D W H s n o i s n e m i D d e g a k c a P 1 5 1 G K t h g i e W 4 1 G K t h g i e w s s o r G e t i h W r o l o C Sound level So...

Page 11: ...Downward Air filter Removable Washable Mildew Proof Temperature control Microcomputer Control Remote controller model YR HB01 Note the data are based on the conditions shown in the table below cooling heating Piping length Indoor 27 DB 19 WB ć ć Outdoor 35 DB 24 WB ć ć Indoor 20 DB ć Outdoor 7 DB 6 WB ć ć 5m 4ˊSensors list type Description Qty Room sensor Its used for detecting room temperature 1 ...

Page 12: ...680 13650 4430 19800 Power Consumption Rat 05 1 96 0 W K d e 03 4 85 3 W W P O C S R E E S 860 4 7 7 h W K n o i t p m u s n o c y g r e n e l a u n n A 0 1 6 1 h m l a v o m e R e r u t s i o M TECHNICAL SPECIFICATIONS 0 1 3 5 1 2 0 0 9 m m D W H s n o i s n e m i D 9 9 3 3 1 3 1 9 9 m m D W H s n o i s n e m i D d e g a k c a P 1 5 1 G K t h g i e W 4 1 G K t h g i e w s s o r G e t i h W r o l ...

Page 13: ...ard Air filter Removable Washable Mildew Proof Temperature control Microcomputer Control 1 0 B H R Y l e d o m r e l l o r t n o c e t o m e R Note the data are based on the conditions shown in the table below h t g n e l g n i p i P g n i t a e h g n i l o o c Indoor 27 DB 19 WB ć ć Outdoor 35 DB 24 WB ć ć Indoor 20 DB ć Outdoor 7 DB 6 WB ć ć 5m 4ˊSensors list type Description Qty 1 e r u t a r e...

Page 14: ...Piping diagrams Domestic air conditioner 5 Pinping diagrams Electronic expansion valve Electronic expansion valve ...

Page 15: ...V1 Varistor 4 FUSE1 Fuse 3 15A 250VAC Series PCB connector Connect with load 1 CN21 Connector for power N and L 2 CN52 3 CN27 Connector for ground 4 CN23 Connector for communication between indoor and outdoor unit 5 CN6 Connector for thermistors 6 CN9 Connector for fan motor 7 CN7 Connector for display 8 CN5 Connector for up down stepmotor 9 CN11 Connector for left right stepmotor 10 CN2 Connector...

Page 16: ...Connector Wiring diagrams Domestic air conditioner PCB CN7 CN21 CN52 CN23 CN9 CN27 CN34 CN6 CN5 CN51 CN5Ą CN2 14 ...

Page 17: ...p down stepmotor 1 1 Fan motor 0 86 6 EMERGENCY SWITCH RECEIVER DISPLAY 1 7 9 1 5 1 1 AMBIENT TEMP SENSOR PIPING TEMP SENSOR 1 1 Right stepmotor left stepmotor 1 1 ÿ 1 1 1 5 1 Fresh air 1 1 6 1 Room card 5 1 1 1 1 Wifi 1 ire controller 1 Ion generator 15 ...

Page 18: ...pened the indoor fan will operate at the set speed and the mode signal will be sent to the outdoor system The system will keep the original status if Tr Ts Airflow speed control temperature difference 1ć Automatic When Tr Ts 3ć high speed When Ts 1ć Tr Ts 3ć medium speed When Tr Ts 1ć low speed When the sensor is off low speed When the airflow speed has no delay from the high to low switching the ...

Page 19: ...is off or Tr Ts 3ć the manual operation can not be made obligatory automatic operation Airgate location control the location for the airgate can be set according to your needs Defrosting function preventing the frosting on the indoor heat exchanger when cooling or dehumidifying When the compressor works continuously for 1 6 minutes adaptable in EEPROM and the temperature of the indoor coils has be...

Page 20: ... signals to the outdoor system Residue heat sending The indoor fan will send the residue heat at a low speed for 12 seconds If other conditions are satisfied when the compressor stops the indoor system will operate at a light speed The indoor fan will stop when the coil temperature is below the heat start temp 4 Defrosting When the system receives the defrosting signal from outdoors the indoor fan...

Page 21: ...off after the timing is finished The followings are several timing methods 1 system on timing The timing indicator will be lightened and the indoor system is under the waiting mode The light will be turned off when the timing is finished and the rest of the system will operate under a normal condition The timing starts since the last reception of the timing signal 2 system off timing When the syst...

Page 22: ...he remote control signal if the press on the urgency key doesn t last for 15 seconds or if the key is loosened Urgency operation If you press the urgency key for less than 5 seconds the buzzer will ring when you press the on off key The system will enter the urgency operation when the urgency key is loosened The urgency operation is fully automatic Test operation The inlet temperature sensor doesn...

Page 23: ...ity confirmation approaches 1 indoor temperature sensor abnormality Under the operation the normal temperature ranges from 120 degree to 30 degree When the temperature goes beyond this range the abnormality can be confirmed If the temperature goes back into the range the system will automatically resume 2 indoor heat interaction sensor abnormality Under the operation the normal temperature ranges ...

Page 24: ...tion 1 and send the cooling signal to the outdoor system Meanwhile you can fix the indoor system at high speed mode the location of the airflow direction board can be switched to the maximal position c Quitting condition The fixed frequency cooling can be quitted after receiving the remote signal and the system will enter the remote setting status 2 Fixed heating a under G code condition high spee...

Page 25: ...03 3598 93 8305 85 1031 1 80 1 64 21 97 6556 88 7989 80 6728 1 78 1 63 20 92 3028 84 0695 76 5017 1 76 1 62 19 87 2775 79 6222 72 5729 1 74 1 60 18 82 5577 75 4384 68 8710 1 72 1 59 17 78 1230 71 5010 65 3815 1 70 1 57 16 73 9543 67 7939 62 0907 1 68 1 55 15 70 0342 64 3023 58 9863 1 66 1 54 14 66 3463 61 0123 56 0565 1 64 1 52 13 62 8755 57 9110 53 2905 1 62 1 51 12 59 6076 54 9866 50 6781 1 60 1...

Page 26: ... 12 3778 0 88 0 87 20 12 7718 12 3223 11 8780 0 86 0 85 21 12 2280 11 8126 11 4011 0 83 0 83 22 11 7102 11 3267 10 9459 0 81 0 80 23 11 2172 10 8634 10 5114 0 78 0 78 24 10 7475 10 4216 10 0964 0 75 0 75 25 10 3000 10 0000 9 7000 0 75 0 75 26 9 8975 9 5974 9 2980 0 76 0 76 27 9 5129 9 2132 8 9148 0 80 0 80 28 9 1454 8 8465 8 5496 0 84 0 83 29 8 7942 8 4964 8 2013 0 87 0 86 30 8 4583 8 1621 7 8691 ...

Page 27: ...2 09 63 2 6232 2 4413 2 2700 2 26 2 13 64 2 5396 2 3611 2 1932 2 31 2 17 65 2 4591 2 2840 2 1195 2 36 2 21 66 2 3815 2 2098 2 0486 2 40 2 25 67 2 3068 2 1383 1 9803 2 45 2 29 68 2 2347 2 0695 1 9147 2 49 2 34 69 2 1652 2 0032 1 8516 2 54 2 38 70 2 0983 1 9393 1 7908 2 59 2 42 71 2 0337 1 8778 1 7324 2 63 2 46 72 1 9714 1 8186 1 6761 2 68 2 50 73 1 9113 1 7614 1 6219 2 73 2 54 74 1 8533 1 7064 1 56...

Page 28: ... 8507 0 7646 0 6867 4 18 3 78 102 0 8281 0 7436 0 6672 4 23 3 83 103 0 8061 0 7233 0 6484 4 29 3 88 104 0 7848 0 7036 0 6303 4 34 3 92 105 0 7641 0 6845 0 6127 4 40 3 97 106 0 7441 0 6661 0 5957 4 46 4 02 107 0 7247 0 6482 0 5792 4 51 4 07 108 0 7059 0 6308 0 5632 4 57 4 12 109 0 6877 0 6140 0 5478 4 63 4 16 110 0 6700 0 5977 0 5328 4 69 4 21 111 0 6528 0 5820 0 5183 4 74 4 26 112 0 6361 0 5667 0 ...

Page 29: ...ethod of using it In order to meet this expectation of the users giving sufficient explanations taking enough time can be said to reduce about 80 of the requests for servicing However good the installation work is and however good the functions are the customer may blame either the room air conditioner or its installation work because of improper handling The installation work and handing over of ...

Page 30: ...Seivice diagnosis Domestic air conditioner 9 Dimensional drawings AS26 35NC1HRA 28 900 210 310 120 120 240 unit mm 10 Center of gravity 900 307 5 310 130 210 102 unit mm ...

Page 31: ...e rated voltage is supplied Check the indoor PCB Check to make sure that the indoor PCB is broken Operation sometimes stops Check the power supply A power failure of 2 to 10 cycles can stop air conditioner operation Equipment operates but does not cool or does not heat only for heat pump Check for faulty operation of the electronic expansion valve Set the units to cooling operation and compare the...

Page 32: ...c e t o r p e h T F22 3 Overcurrent protection of AC electricity for the outdoor model Page 49 F3 4 Communication fault between the IPM and outdoor PCB Page 50 F19 6 Power voltage is too high or low Page 51 F4 8 Overheat protection for Discharge temperature Page 52 F8 9 Outdoor DC fan motor fault F21 10 Defrost temperature sensor failure Page 43 F7 11 Suction temperature sensor failure Page 43 F6 ...

Page 33: ...of thermistor using tester The relationship between normal temperature and resistance is shown in the value of indoor thermistor 11 4 2 EEPROM abnormal Thermistor resistance check Yes NO Yes Check the connector connection whether if it loose or misplug Re connect NO Replace the thermistor Replace the indoor PCB Is the resistance is conformity with normal temperature Method of malfunction tection M...

Page 34: ... Malfunction detection conditions Supposed causes Troubleshooting The Data detected by the EEPROM are used to determine MCU when the data of EEPROM is error or the EEPROM is damaged ŶFaulty EEPROM data ŶFaulty EEPROM ŶFaulty PCB Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Replace the indoor or outdoor mainboard 32 ...

Page 35: ...CN2 on the indoor PCB 12 the indoor pcb is damaged and need replace Pull out the terminals on the indoor mainboard and reinsert them 1R HV Is it ok HV Method of malfunction detection Malfunction detection conditions Troubleshooting The fan speed detected by the Hall IC during fan motor running which is used to determine the fan motor operating When there is no fan speed feedback signal within 2 mi...

Page 36: ...tected by checking the fan running condition and so on when the data of EEPROM is error or the EEPROM is damaged ŶDC fan motor protection dues to the DC fan motor faulty ŶDC fan motor protection dues to faulty PCB Supposed causes Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred LED1 flash 9 times Outdoor diplay 34 ...

Page 37: ... run Yes Measure the voltage between 3 and 6 of the terminal about 0 5v Is it normal N0 The motor of the outdoor unit is damaged and needs replacing 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 Measure the voltage between 5 and 3 of the terminal about 1 6v NO Is it normal The mainboard...

Page 38: ...unctions are reported after it has run for some time Malfunction unsolved Method of malfunction detection Malfunction detection conditions Troubleshooting IPM protection is detected by checking the compressor running condition and so on ŶThe system leads to IPM protection due to over current ŶThe compressor faulty leads to IPM protection Ŷcircuit component of IPM is broken and led to IPM protectio...

Page 39: ...S NO Yes NO The compressor is started normally but malfunctions are reported after it has run for some time Check the power supply is too low or too high NO Method of malfunction detection Malfunction detection conditions Troubleshooting he current of the compressor is too high when the IPM Module is damaged or the compressor is damaged power supply voltage is too low or too high Supposed causes L...

Page 40: ...nboard with a new one Replace the outdoor IPM module with a new one YES NO NO YES Malfunction unsolved 1 Pull out and reinsert the terminals 2 Replace connected wire Method of malfunction detection Malfunction detection conditions Troubleshooting Communication is detected by checking the IPM module and the outdoor PCB ŶThe outdoor PCB broken leads to communication fault ŶThe IPM module broken lead...

Page 41: ...r supply 310VDC with a multimeter check whether the power is 150 V or 390V Method of malfunction detection Malfunction detection conditions Troubleshooting An abnormal voltage rise or fall is detected by checking the specified voltage detection An voltage signal is fed from the voltage detection circuit to the microcomputer ŶSupply voltage not as specified ŶThe IPM module is broken ŶThe outdoor PC...

Page 42: ...ture is below 110ć Pull out the exhaust sensor and measure its resistance at standard temperatures according to the resistance temperature table the results deviate much The sensor is damaged Replace the sensor with a new one The outdoor mainboard is damaged and needs be replaced YES NO NO YES Method of malfunction detection Malfunction detection conditions Troubleshooting The Discharge temperatur...

Page 43: ...dust 1 Reconnect the linking cable 2 Replace the linking cable with new one Method of malfunction detection Malfunction detection conditions Troubleshooting Communication is detected by checking the indoor PCB and the outdoor PCB ŶThe outdoor PCB broken leads to communication fault ŶThe indoor PCB broken leads to communication fault ŶCommunication wiring disconnected ŶThe indoor PCB is broken ŶThe...

Page 44: ...tdoor unit with a multimeter If 230VAC is available but 310DC not the power module is damaged replace it with a new one Test the outdoor power supply 230VAC and 310VDC with a multimeter The outdoor mainboard is damaged replace it with a new one The indoor mainboard is damaged replace it with a new one If the value varies between 0 and 80 VAC the outdoor mainboard is damaged replace it with a new o...

Page 45: ...mes IPM Module is damaged and needs replacing the Malfunctions exist also the compressor is damaged replace a new one YES NO YES Malfunction unsolved Maybe there is some disturbance Method of malfunction detection Malfunction detection conditions Troubleshooting The position of the compressor rotor can not detected normally when the wiring of compressor is wrong or the connection is poor or the co...

Page 46: ... 2 Reinstall the fan Use some tools to measure the pressure of systemˈ YES NO YES NO Method of malfunction detection Malfunction detection conditions Troubleshooting High work intense control is activated in the heating mode if the temperature being sensed by the heat exchanger thermistor exceeds the limit Activated when the temperature being sensed by the heat exchanger rises above 65ć twice in 3...

Page 47: ...Circuit diagrams Domestic air conditioner 12 Circuit diagrams 45 ...

Page 48: ...Circuit diagrams Domestic air conditioner 46 ...

Page 49: ...uit diagrams Domestic air conditioner Sincere Forever Haier Group Haier Industrial Park No 1 Haier Road 266101 Qingdao China_ Http www haier com Edited by Zou Na Signed by Shen Weijie Approved by He Shiquan ...

Page 50: ...otential 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 WARNING 2016 Qingdao Haier Air Conditioner General corp Ltd All rights reserved Unauthori...

Page 51: ...Removal of procedure 1 Removal of Air Filter 1 Domestic Air Condition ...

Page 52: ...val of procedure 2 Please embed the two during installation hooks on air filter completely into the unit Please embed the air filters into the unit along the grooves as installation 2 Domestic Air Condition ...

Page 53: ...start the removal procedure of front grille one side to another to release each axis until it is on the horizontal position and then release the pivots on both sides of the unit to remove the front panel 2 Removal of front panel 3 Domestic Air Condition ...

Page 54: ...Removal of procedure three two HOOKS 4 Domestic Air Condition ...

Page 55: ...Removal of procedure 3 Removal of horizontal flap flap flap flap flap 5 Domestic Air Condition ...

Page 56: ...Removal of procedure 4 Removal of Drain pan 6 Domestic Air Condition ...

Page 57: ...Removal of procedure 5 Removal of vertical blades and swing motor 7 Domestic Air Condition ...

Page 58: ...Removal of procedure 6 Removal of Electrical Box 8 Domestic Air Condition ...

Page 59: ...Removal of procedure 7 Removal of Heat Exchanger 9 Domestic Air Condition ...

Page 60: ...Removal of procedure 10 Domestic Air Condition ...

Page 61: ...Removal of procedure 8 Removal of Fan Rotor and Motor 11 Domestic Air Condition ...

Page 62: ...Removal of procedure 12 Domestic Air Condition ...

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