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Haier HSU-12LEK03-Y2 Service Manual

Ek-series wall mounted type
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SERVICE MANUAL

Order No.

Wall mounted Type

E -Series
Model No. HSU-
LEK03-Y2
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
© (Qingdao Haier Air Conditioner General corp.,Ltd)
All right reserved .Unauthorized copying and distribution is a violation of law
Haier Group

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  Summary of Contents for Haier HSU-12LEK03-Y2

  • Page 1: Service Manual

    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 © (Qingdao Haier Air Conditioner General corp.,Ltd)
  • Page 3 HSU-12LEK03-Y2 Vertical Blades and Swing Motor 9.9 Removal of Outdoor Panel 9.10 10.4 Description of coding rules of unit model..........68...
  • Page 4: Safety Cautions

    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. Therefore, be sure to observe all the safety caution items described below.
  • Page 5: Cautions Regarding Products After Repair

    Do not tilt the unit when removing it. The water inside the unit can spill and wet the furniture and floor. Be sure to check that the refrigerating cycle section has cooled down sufficiently before conducting repair work.
  • Page 6 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. Be sure to install the packing and seal on the installation frame properly. If the packing and seal are not integral installed properly, water can enter the room and wet the furniture and floor.
  • Page 7: Inspection After Repair

    1.1.3 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.
  • Page 8: Using Icons List

    HSU-12LEK03-Y2 Introduction 1.1.4 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: 1.1.5 Using Icons List Icon Type of Information Description A “note” provides information that is not indispensable, but may...
  • Page 9 K03-Y2...
  • Page 10 HSU-12LEK03-Y2 HSU-12LEK03-Y2...
  • Page 11 HSU-12LEK03-Y2...
  • Page 13: Functions And Control

    Compressor can’t be controlled by temperature sensor within 2 minutes after it starts control When Tr> Ts, outdoor fan motor and compressor on, and indoor fan motor run at fixed wind speed. When Tr Ts, outdoor fan motor and compressor off, and when Tr > Ts, outdoor fan motor and compressor are working again .If Tr=Ts, the indoor fan motor ,...
  • Page 14 Zone of return deference OFF after 5 minutes Fan ,compressor ON Tp( .) When the compressor ceases due to the sensor OFF, unit On or OFF or fault, it will 3minutes stand-by time maintain pause for 3 minutes. If the unit is suddenly off during running due to power failure, or closed for maintenance...
  • Page 15 When the air conditioner is in OFF state, press the emergency switch for 5 seconds till hearing 2 sounds of click from the buzzer, then the air conditioner will turn to the trial run state. The unit will run in the refrigerating mode and the indoor fan will run in high wind speed mode.
  • Page 16: Timer Function

    2 seconds elapse. You can set 24-hour timer on or timer off as required, and the minimum time unit is 1 minute. After setting, a pattern of clock displayed on the LED, and it is off when timer Timer function: setting is completed.
  • Page 17 2. The indoor heat exchanger thermistor is used for preventing high temperature and high temperature expiration protection. During the heating operation , When the temp. of coil pipe is above 72 ,compressor and outdoor fan motor stop running 2 seconds later, and inlet air runs as the temp. sensor is off...
  • Page 18: Value Of Thermistor

    HSU-12LEK03-Y2 Functions and control 5.2 Value of Thermistor 5.2.1 Indoor unit Room sensor R25 =23K ±3.5% B25 /50 =4200K±3% Temp.( ) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) 568.8372 501.0746 440.8435 -1.97 1.75 530.9600 468.6491 413.1441 -1.95 1.74 495.8488 438.5314...
  • Page 19 HSU-12LEK03-Y2 Functions and control 59.4984 55.9729 52.5917 -1.20 1.15 56.3905 53.1320 50.0006 -1.17 1.13 53.4631 50.4521 47.5523 -1.15 1.11 50.7048 47.9230 45.2384 -1.13 1.09 48.1049 45.5355 43.0505 -1.10 1.07 45.6534 43.2808 40.9813 -1.08 1.04 43.3410 41.1509 39.0236 -1.05 1.02 41.1592 39.1381...
  • Page 20 HSU-12LEK03-Y2 Functions and control 7.3580 6.8556 6.3797 -1.85 1.76 7.0796 6.5884 6.1237 -1.90 1.79 6.8131 6.3329 5.8793 -1.94 1.83 6.5581 6.0887 5.6459 -1.99 1.87 6.3140 5.8552 5.4230 -2.03 1.91 6.0802 5.6318 5.2100 -2.07 1.95 5.8563 5.4181 5.0065 -2.12 1.99 5.6417 5.2136...
  • Page 21 HSU-12LEK03-Y2 Functions and control 1.5650 1.3900 1.2331 -4.08 3.66 1.5180 1.3470 1.1937 -4.13 3.70 1.4726 1.3054 1.1559 -4.19 3.75 1.4287 1.2654 1.1194 -4.24 3.80 1.3864 1.2268 1.0842 -4.30 3.84 1.3455 1.1895 1.0503 -4.36 3.89 1.3060 1.1535 1.0176 -4.42 3.94 1.2679 1.1188...
  • Page 22 HSU-12LEK03-Y2 Functions and control Pipe Sensor R25 =10K ±3% B25 /50 =3700K±3% 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...
  • Page 23 HSU-12LEK03-Y2 Functions and control 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 13.3431 12.8572...
  • Page 24 HSU-12LEK03-Y2 Functions and control 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 2.6232 2.4413 2.2700 -2.26 2.13 2.5396 2.3611 2.1932 -2.31 2.17 2.4591 2.2840...
  • Page 25 HSU-12LEK03-Y2 Functions and control 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 0.7247 0.6482 0.5792 -4.51 4.07 0.7059 0.6308 0.5632 -4.57 4.12 0.6877 0.6140 0.5478 -4.63 4.16 0.6700 0.5977 0.5328 -4.69 4.21 0.6528 0.5820...
  • Page 26 K03-Y2...
  • Page 27: Safety Instructions And Warnings

    Safety Instructions and Warnings Before disposing an old air conditioner that Before starting the air conditioner, read the goes out of use, please make sure it's inop- information given in the User's Guide caref- erative and safe. Unplug the air conditioner ully.
  • Page 28 K03-Y2 2 Instruction...
  • Page 29: Safety Instruction

    Do not attempt to install the air conditioner by yourself because improper works may cause electric shock, fire, water leakage. lnstallation in a inadequate place may cause accidents. Do not install in the following place. CAUTION Do not install in the...
  • Page 30 PROHIBITION PROHIBITION CAUTION Take fresh air occasionally especially Do not operate the switch with Do not use for the purpose of storage of food, art work, precise equipment, when gas appliance is running at the wet hand. breeding, or cultivation.
  • Page 31: Parts And Functions

    Hint: POWER/SOFT Remove the batteries in case unit won't be in usage for a long period. If there are any display after taking-out, just need to press reset key Domestic air conditioner...
  • Page 32: Auto Operation

    2.In FAN operation mode the unit will not operate in COOL mode but only in FAN mode ,AUTO is not available in FAN mode.And temp.setting is disabled. Heat Operation Air Flow Direction Adjustm Vertical flap Pos.1 Pos.2...
  • Page 33: Timer Operation

    You can let unit start or stop automatically a following times: is defective or lost. Before you wake up in the morning, or get back from outside When the emergency operation switch is or after you fall asleep at night.
  • Page 34 Power Failure Resume Function Note to the power failure resume: If the unit is started for the first time, the compressor will not press the sleep button ten times in five seconds and enter start running unless 3 minutes have elapsed. When the power function after hearing four sounds.And press the sleep button...
  • Page 35: Maintenance

    Clean the filter. for a long time, turn off the Use a vacuum cleaner to remove dust, or wash the filter with power supply main switch. water.After washing, dry the filter completely in the shade.
  • Page 36: Troubleshooting

    Should there be a big noise from air flow in unit operation, air filter may be too dirty. This is because the system circulates smells from the interior air such as the smell of Smells are generated.
  • Page 37 K03-Y2...
  • Page 38 7.2.2 Indoor EEPROM error Indoor Display Method of The date received from EEPROM is checked whether normal Malfunction Detection Malfunction When the date sent from EEPROM cannot be received normally , or when EEPROM is not Decision detected Conditions Supposed Faulty PCB Causes...
  • Page 39: Fan Motor(Ac Motor) Or Related Abnormality

    Codes and description HSU-12LEK03-Y2 7.2.3 Fan Motor(AC Motor) or Related Abnormality Indoor Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation Malfunction Detection Malfunction when the detected rotation feedback signal don’t received in 2 minutes...
  • Page 40: Codes And Description

    CN9 on indoor PCB well inserted or not? Electrify the machine again and turn it on in the cooling operation, Measure voltage between the positions 9 ( red wire) and 5( black wire) of Terminal CN9 on the indoor PCB...
  • Page 41: Installation Manual Of Room Air Conditioner

    Right Below Pipe supporting plate Connecting cable Note:Cooling only units don't have Drain-elbow The marks from in the figure are the parts numbers. The distance between the indoor unit and the floor should be more than 2m. Domestic air conditioner...
  • Page 42 2. Make sure once more the proper level of the plate, by hanging a thread with a weight from the central top of the plate, then fasten securely the plate with the attachment steel nail.
  • Page 43: Connecting The Indoor/Outdoor Electric Cable

    1. If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similar qualified person. The type of connecting wire is H05/07RN-F or 245IEC57(YZW).
  • Page 44: Outdoor Unit

    Outdoor unit 1.Connection of pipes To bend a pipe, give the roundness as large as possible not to crush the pipe Connecting the pipe of gas side first makes working easier. The max vertical distance between the indoor unit and the outdoor unit is 5 m.
  • Page 45: Removal Procedure

    Removal Procedure 9. Removal Procedure Indoor unit Removal of Air Filter Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step 1. Features 2. Remove the air filters. Hold the front panel by...
  • Page 46 HSU-12LEK03-Y2 3-hoo Domestic air conditioner...
  • Page 47 HSU-12LEK03-Y2...
  • Page 48 HSU-12LEK03-Y2 Pull the two bolt dowels...
  • Page 49 HSU-12LEK03-Y2 three...
  • Page 50 HSU-12LEK03-Y2 Pull the two chips out from the frame...
  • Page 51 HSU-12LEK03-Y2...
  • Page 52 HSU-12LEK03-Y2 marked and pull the electrical control box cover out Loosen the two mark- ed screw and then loo- sen the hooks marked the concrol box can be pulled out...
  • Page 53 HSU-12LEK03-Y2...
  • Page 54 HSU-12LEK03-Y2...
  • Page 55 HSU-12LEK03-Y2...
  • Page 56 HSU-12LEK03-Y2...
  • Page 57 HSU-12LEK03-Y2 9.9 Removal of outdoor panel HSU-12LEK03-Y2...
  • Page 58 HSU-12LEK03-Y2...
  • Page 59 HSU-12LEK03-Y2...
  • Page 60 HSU-12LEK03-Y2...
  • Page 61: Removal Of Electrical Box

    HSU-12LEK03-Y2 9.10 Removal of Electrical Box...
  • Page 62: Removal Of Fan And Fan Motor

    HSU-12LEK03-Y2 9.11 Removal of Fan and Fan Motor...
  • Page 63: Removal Of Fan Motor Bracket And Partition

    HSU-12LEK03-Y2 9.12 Removal of fan motor bracket and partition...
  • Page 64 HSU-12LEK03-Y2...
  • Page 65: Removal Of Compressor And Heat Exchanger

    HSU-12LEK03-Y2 9.13 Removal of compressor and heat exchanger...
  • Page 66 HSU-12LEK03-Y2...
  • Page 67: Piping Diagrams

    HSU-12LEK03-Y2 Appendix 10. Appendix 10.1 Piping Diagrams...
  • Page 68 HSU-12LEK03-Y2 Indoor HSU-12LEK03-Y2...
  • Page 69 K03-Y2 K03-Y2 6...
  • Page 70: Circuit Diagrams

    HSU-12LEK03-Y2 10.3 Circuit Diagrams Domestic air conditioner...
  • Page 71: Description Of Coding Rules Of Unit Model

    The structure code of indoor & outdoor unit: S(wall-mounted) H-Abbreviation of Haier Examples: HSU-12LEK03-Y2, It represents wall-mounted split type heat pump air conditioner . The cooling capacity is 12000BTU/h, and the power supply is 220-230V/50Hz, "EK” means the developing sequence,and"Y2" means the star rating is 2 Star.
  • Page 72 HSU-12LEK03-Y2 Qingbo.Miao Yang Bifei Wu Hongjin...