Haier HSU18VHJ(DB) Service Manual
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Haier HSU18VHJ(DB) Service Manual

Wall mounted type dc inverter e-series
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SERVICE MANUAL
Order No.$&69

Wall mounted Type

DC Inverter E-Series
Model No. HSU12/18VHJ(DB)
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 HSU18VHJ(DB)

  • Page 1: Wall Mounted Type

    © (Qingdao Haier Air Conditioner General corp.,Ltd) All right reserved .Unauthorized copying and distribution is a violation of law...
  • Page 2 HSU12/18VHJ(DB) of indoor unit Main functions and control specifications of outdoor unit Function of main thermistor Value of thermistor Service Diagnosis Caution for diagnosis 3 Error codes and description indoor display For 12K indoor unit For 18K indoor unit For 12/18K outdoor unit...
  • Page 3 VHJ(DB)

  • Page 4: Safety Cautions

    Introduction VHJ(DB) 1. Introduction 1.1 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 VHJ(DB) 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 VHJ(DB) 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 VHJ(DB) Introduction 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. If the power cable and lead wires have scratches or deteriorated, be sure to replace them.
  • Page 8 VHJ(DB)
  • Page 10 HSU12/18VHJ(DB) HSU18VHJ(DB) HSU12VHJ(DB) 3.51(1.47-4.1) 3.93(1.35-4.1) 5.27(2.2-5.86) 5.46(1.93-6.15) 18000(7500-20000) 18650(6600-21000) 12000(5000-14000 ) 13400(4600-14000) 3018.6(1260-3520) 4532(1006.2-4790.2) 4696(1662-5290) 3380(1160-3530) pints 4.23 3.38 1090(180-1375) 1 190(260-1400) 1640(300-2390) 1650(360-2380) SEER/HSPF 6.35 6.35 9.52 12.7 16.0 7. 2 8. 2 7. 2 8. 2 6. 3 6.
  • Page 11 HSU12/18VHJ(DB) Rotary Compressor Rotary Compressor DA89X1C-20FZ SNB130FGYM2 ESTER OIL VG74 FV50S 0.37 R410a R410a 42.5 35.5 31.6 31.6 31.6 31.6 1115 1115 1115 1115 1090 1050 643x783x255 543x783x255 699X915X325 599X915X325 72.75 88.18 79.37 80 F 67 F 70 F /60° FWB 95 F 75 F 47 F...
  • Page 12 HSU12/18VHJ(DB) 4.1 Indoor unit Connectors FOR 12K Connectors PCB(1) (Control PCB) 1) CN26 Connector for fan motor 2) CN11 Connector for STEP motor 3) CN8 Connector for heat exchanger thermistor and Room temperature thermistor 4)CN27 Connector for fan feedback 5)CH1 Connector for power L wire 6)CON2 Connector for power N wire 7) CON7 Connector for communicate wire 8) CN30 Connector for transformer input...
  • Page 13 HSU12/18VHJ(DB) PCB(1) CN26 CON12 CN27 CN32 CN11 CON2 CN30 CON8 CN31 Domestic Air Conditioner...
  • Page 14 HSU12/18VHJ(DB) FOR 18K Connectors PCB(1) (Control PCB) 1) CN26 Connector for fan motor 2) CN1 Connector for heat exchanger thermistor and Room temperature thermistor 3) CN11 Connector for UP&DOWN STEP motor 4) CON2 Connector for power N wire 5) CON1 Connector for power L 6) CN32 Connector for display board 7) C0N6 C0N8 Connector for ions generator 8 C0N7 Connector for communicate between the indoor board and the outdoor...
  • Page 15 HSU12/18VHJ(DB) PCB(1) CN32 CON7 CN11 CN48 CON6 CON8 CON1 CON2 CN26 Domestic Air Conditioner...

  • Page 16: Outdoor Unit

    HSU12/18VHJ(DB) Outdoor unit FOR12K Connectors PCB(1) (Control PCB) 1) CN1 CN2 Connector for power N and L 2) CN3 Connector for ground 3) CN22 Connector for DC POWER 15Vand 5V to the module board 4) CN16 Connector for electric expansion valves 5) CN21 Connector for DC fan motor 6) CN10 Connector for four way valve coil 7) CN17 CN18 CN19 CN20 Connector for thermistors...
  • Page 17 HSU12/18VHJ(DB) PCB(1) CN26 CN24 CN23 CN22 CN21 CN17 CN18 CN19 CN20 CN16 CN10 CN25 Domestic Air Conditioner...
  • Page 18 HSU12/18VHJ(DB) PCB(2) CN11 CN10 Domestic Air Conditioner...
  • Page 19 HSU12/18VHJ(DB) FOR 18K Connectors PCB(1) (Control PCB) 1) CN1 CN2 Connector for power N and L 2) CN3 Connector for ground 3) CN22 Connector for DC POWER 15Vand 5V to the module board 4) CN16 Connector for electric expansion valves 5) CN21 Connector for DC fan motor 6) CN10 Connector for four way valve coil 7) CN17 CN18 CN19 CN20 Connector for thermistors...
  • Page 20 HSU12/18VHJ(DB) PCB(1) CN26 CN24 CN23 CN22 CN21 CN17 CN18 CN19 CN20 CN16 CN10 CN25 Domestic Air Conditioner...
  • Page 21 HSU12/18VHJ(DB) PCB(2) CN11 CN10 Domestic Air Conditioner...
  • Page 22 This specification use for HSU12/18VHJ DB frequency conversion air condition are manufactured by Haier air condition parent company. "Setting value" (express in parameter) in this specification means is a parameter that is stored in EEPROM. Refer to [EEPROM parameter table].

  • Page 23: Main Functions

    HSU12/18VHJ(DB) 5.1.1.3 Wind volume limit When the compressor is working and the max setting for indoor fan motor is medium or weak, the upper limit of indicated frequency is as follows: Frequency control form for wind volume Limited frequency Limited frequency variables Medium wind volume FQLIMMD...

  • Page 24: Special Functions

    HSU12/18VHJ(DB) 5.1.2.2 When the compressor stops and remains idle for 3 minutes 20 seconds after the compressor stops, the up wind volume is weak (switching to SSLO in silent running mode) and then slightly weak. While the down wind volume is stoped If the compressor stops when the heat running starts, the wind volume is weak 5.1.2.3 Dehumidification running Under the dehumidification mode the fan motor stops as the compressor stops...

  • Page 25: Air Cleaning

    HSU12/18VHJ(DB) is in cooling mode, it operates with powerful cooling or silent cooling. When the main unit is in heating mode, it operates with powerful heating or silent heating. When the main unit is in wind-sending mode, there are no powerful or silent modes. There is no powerful mode for wind-sending and moisture removing Powerful heating Change the set temperature.

  • Page 26: Sleeping Function

    HSU12/18VHJ(DB) 5.1.3.5 Sleeping function a. After setting the sleeping function, the refrigerating mode and dehumidification mode will run as per the following rules: 1 hour 1 hour 6hours T( ) Ts+4 Ts+2 Sleep t(hour) b.After setting the sleeping function, the heating mode will run as per the following rules: T( ) 1 hour 1 hour 3hours...
  • Page 27 HSU12/18VHJ(DB) 5.1.3.8 Rated Operation Rated Cooling: When receiving the instruction of indoor unit rated operation, the unit will start rated cooling operation. Rated Heating: When receiving the instruction of indoor unit rated operation, the unit will start rated heating operation. Domestic Air Conditioner...
  • Page 28 HSU12/18VHJ(DB) 5.2 Main functions and control specification of outdoor unit Sensor Code Definition: Tai= Indoor Ambient Temperature, Tao=Outdoor Ambient Temperature, Tc1=Indoor Coil, Td= Air Discharge, Te= Outdoor Coil, Ts=Air Intake 5.2.1 Outdoor Unit Operation Frequency and Control Compressor Operation Frequency Range Compressor Operation Frequency Range: Outdoor Temperature 4 18...

  • Page 29: Outdoor Fan Control

    HSU12/18VHJ(DB) 5.2.2 Outdoor fan control Compressor startup within 3min ,outdoor fan speed control as follows: Outdoor < Temperature Cooling/ Dehumidification Heating fter compressor runs 3min ,outdoor fan speed control as follows: Cooling/ Dehumidification: Compressor Operation Frequency Hz <25 Heating: Compressor Operation Frequency (Hz) <25 Compressor shutdown and outdoor fan residual heat blow process When compressor shuts down in cooling mode, outdoor fan automatically jumps to low speed and...
  • Page 30 HSU12/18VHJ(DB) TE C×TA Among which: C:TA 0 C=0.8 TA 0 C=0.6 For area prone to frost, the value is set at 6 when unit leaves the factory. Defrosting entry temperature control -15 C×TA Defrosting Time Interval time interval between two defrosting cycles is 45 minutes. Defrosting Operation When defrosting begins, compressor will stop for one minute, external fan is running and 50s later, four-way valve will be off.
  • Page 31 HSU12/18VHJ(DB) 5.2.6 System Protection Function 5.2.6.1 3 minutes stand-by time Time interval between compressor shutdown and restart is set at 3 minutes to ensure that compressor will only restart after 3-minute shutdown and initial energization valves are turned on to adequate opening position after being fully turned off.

  • Page 32: Outdoor Temperature Limit

    HSU12/18VHJ(DB) 5.2.6.4 Outdoor Temperature Limit Cooling: When outdoor temperature is lower than 23 , cooling operation will start, compressor frequency is limited to less than 50 HZ, outdoor wind speed is forced at level 1. Heating: When outdoor temperature is higher than 18 , heating operation will start, compressor frequency is limited to less than 53 HZ, outdoor wind speed is forced at level 1.
  • Page 33 HSU12/18VHJ(DB) 5.3 Function of Main Thermistor Note: A:Outdoor suction temperature sensor B: Exhaust temperature sensor C: Indoor heat-exchange sensor Outdoor Suction Temperature Sensor The outdoor heat exchanger thermistor is used for controlling target discharge temperature. The system sets a target discharge temperature according to the outdoor and indoor heat exchanger temperature, and controls the electronic expansion valve opening so that the target discharge temperature can be obtained.

  • Page 34: Room Sensor

    HSU12/18VHJ(DB) 5.4 Value of Thermistor 5.4.1 intdoor 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 387.3645 -1.93 1.72 463.2850 410.5433...
  • Page 35 HSU12/18VHJ(DB) 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 37.1708 -1.03 1.00 39.0998 37.2355 35.4167 -1.00 0.98 37.1553 35.4363...
  • Page 36 HSU12/18VHJ(DB) 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 4.8120 -2.16 2.03 5.4361 5.0178...
  • Page 37 HSU12/18VHJ(DB) 1.6138 1.4347 1.2739 -4.02 3.61 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 38 HSU12/18VHJ(DB) 66.3463 61.0123 56.0565 -1.64 1.52 62.8755 57.9110 53.2905 -1.62 1.51 59.6076 54.9866 50.6781 -1.60 1.49 56.5296 52.2278 48.2099 -1.58 1.47 53.6294 49.6244 45.8771 -1.56 1.46 50.8956 47.1666 43.6714 -1.54 1.44 48.3178 44.8454 41.5851 -1.51 1.42 45.8860 42.6525 39.6112 -1.49 1.40 43.5912 40.5800...
  • Page 39 HSU12/18VHJ(DB) 8.1371 7.8428 7.5522 -0.95 0.93 7.8299 7.5377 7.2498 -0.98 0.97 7.5359 7.2461 6.9611 -1.02 1.00 7.2546 6.9673 6.6854 -1.06 1.04 6.9852 6.7008 6.4222 -1.10 1.07 6.7273 6.4459 6.1707 -1.13 1.11 6.4803 6.2021 5.9304 -1.17 1.14 6.2437 5.9687 5.7007 -1.21 1.18 6.0170 5.7454...
  • Page 40 HSU12/18VHJ(DB) 1.7434 1.6021 1.4710 -2.88 2.67 1.6913 1.5528 1.4243 -2.92 2.71 1.6409 1.5051 1.3794 -2.97 2.75 1.5923 1.4592 1.3360 -3.02 2.80 1.5454 1.4149 1.2942 -3.07 2.84 1.5000 1.3721 1.2540 -3.12 2.88 1.4562 1.3308 1.2151 -3.17 2.93 1.4139 1.2910 1.1776 -3.22 2.97 1.3730 1.2525...

  • Page 41: Outdoor Unit

    HSU12/18VHJ(DB) 5.4.2 Outdoor Unit Ambient Sensor, Suction Sensor, Defrosting Sensor R25 =10K 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...
  • Page 42 HSU12/18VHJ(DB) 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 13.9436 13.4185...
  • Page 43 HSU12/18VHJ(DB) 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 2.8000 2.6112 2.4328 -2.17 2.05 2.7099 2.5246 2.3498 -2.22 2.09 2.6232 2.4413...
  • Page 44 HSU12/18VHJ(DB) 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 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...
  • Page 45 HSU12/18VHJ(DB) Discharging Sensor R80 =50K B25/80 =4450K 3% Temp.(( )) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) 14646.0505 12061.7438 9924.4999 -2.96 2.45 13654.1707 11267.8730 9290.2526 -2.95 2.44 12735.8378 10531.3695 8700.6388 -2.93 2.44 11885.1336 9847.7240 8152.2338 -2.92 2.43 11096.6531 9212.8101 7641.8972 -2.91 2.42...
  • Page 46 HSU12/18VHJ(DB) 1171.0715 1038.0743 919.3533 -2.35 2.09 1109.4661 985.0146 873.7359 -2.33 2.08 1051.4226 934.9440 830.6210 -2.31 2.07 996.7169 887.6792 789.8583 -2.29 2.06 945.1404 843.0486 751.3077 -2.27 2.04 896.4981 800.8922 714.8380 -2.26 2.03 850.6086 761.0603 680.3265 -2.24 2.02 807.3024 723.4134 647.6580 -2.22 2.00 766.4212 687.8205...
  • Page 47 HSU12/18VHJ(DB) 134.8559 127.3081 120.0746 -1.42 1.36 129.2457 122.1630 115.3645 -1.40 1.34 123.8956 117.2504 110.8618 -1.37 1.32 118.7926 112.5589 106.5564 -1.35 1.30 113.9241 108.0776 102.4388 -1.32 1.28 109.2784 103.7961 98.5000 -1.30 1.26 104.8443 99.7046 94.7315 -1.28 1.23 100.6112 95.7939 91.1253 -1.25 1.21 96.5692 92.0553...
  • Page 48 HSU12/18VHJ(DB) 25.3290 24.0574 22.8291 -1.61 1.55 24.5311 23.2765 22.0662 -1.65 1.59 23.7620 22.5245 21.3323 -1.69 1.63 23.0205 21.8002 20.6261 -1.73 1.66 22.3055 21.1025 19.9465 -1.77 1.70 21.6159 20.4303 19.2924 -1.81 1.74 20.9508 19.7825 18.6626 -1.85 1.77 20.3091 19.1582 18.0563 -1.89 1.81 19.6899 18.5564...

  • Page 50: Parts And Functions

    system configration VHJ(DB) Parts and Functions Remote controller Indoor Unit 8. HEALTH button 9. ON/OFF button 10. TIMER ON display 11. FAN SPEED display Inlet grille Air Purifying Filter Inlet AUTO 12. LOCK display 13. SWING UP/DOWN display Emergency Outlet 14.

  • Page 51: Test Operation

    system configration HSU12/18VHJ(DB) Operation Clock set Emergency operation and test operation Press CLOCK button, "AM" or "PM" flashes. Press to set correct time. Each press will increase Emergency Operation: or decrease 1min. If the button is kept pressed,time will Use this operation only when the change quickly.
  • Page 52 system configration HSU12/18VHJ(DB) Operation Sleep Operation In AUTO mode The unit operates in corresponding sleep Before going to bed, you can simply press the mode adapted to the automatically selected SLEEP button and unit will operate in SLEEP operation mode. mode and bring you a sound sleep.
  • Page 53 HSU12/18VHJ(DB) system configration Operation Timer On/Off On-Off Operation IMPORTANT INFORMATION REGA- Set clock correctly before starting TIMER operation. RDING THE REFRIGERANT USED 1.After unit starts, select your desired operation mode. 2.Press TIMER button to change TIMER mode. Every Contains fluorinated greenhouse gases time the button is pressed, display changes as follows: covered by the Kyoto Protocol Remote controller:...

  • Page 54: Maintenance

    system configration HSU12/18VHJ(DB) 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 soft and temperature dry cloth.For serious stains,use a neutral Do not use water wipe the controller with a detergent diluted with water.Wring the water dry cloth.Do not use glass cleaner or chemical...
  • Page 55 HSU12/18VHJ(DB) system configration 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 power source...

  • Page 56: Troubleshooting

    HSU12/18VHJ(DB) system configration Trouble shooting Cautions grille of the air Do not obstruct or cover the ventilation Before asking for service, check the following first. conditoner.Do not put fingers or any other things into the inlet/outlet and swing louver. .In no Do not allow children to play with the air conditioner Phenomenon Cause or check points...

  • Page 57: Service Diagnosis

    HSU12/18VHJ(DB) Functions and control 7 Service Diagnosis 7.1 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.When a signal transmission error occurs between the indoor and outdoor units.In either case, conduct the diagnostic procedure described in the following pages.

  • Page 58: Error Codes And Description Indoor Display

    HSU12/18VHJ(DB) Functions and control 7.3.Error Codes and Description indoor display Code indication Reference Outdoor Description Page indoor (LED1 flash times) Indoorand Outdoor Communication fault between indoor and Page .78 outdoor units Room temperature sensor failure Page .69 Indoor Malfunction Heat-exchange sensor failure Page .69 Indoor EEPROM error Page .77...
  • Page 59 HSU12/18VHJ(DB) Functions and control 7.3.1Thermistor or Related Abnormality (indoor unit) E1: Room temperature sensor failure Indoor Display E2: Heat-exchange sensor failure Method of the temperatures detected by the thermistors are used to determine thermistor errors Malfunction Detection Malfunction when the thermistor input is more than 4.92V or less than 0.08V during compressor Decision operation.
  • Page 60 HSU12/18VHJ(DB) Functions and control 7.3.2 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 Malfunction when the detected rotation feedback singal don’t receiced in 2 minutes Decision Conditions Supports curses...
  • Page 61 Functions and control HSU12/18VHJ(DB) Does fan rotate Replace fan motor smoothly? Turn power ON and operate fan Turn off power supply and disconnect fan motor connector,then turn power ON Does it rotate? Check output of fan motor connector I s m o t o r p o w e r voltage DC310V Replace indoor unit Stop fan motor...

  • Page 62: Ipm Protection

    Functions and control HSU12/18VHJ(DB) 7.3.3 IPM protection outdoor display LED1 flash 2 times: Indoor Display F1 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...
  • Page 63 HSU12/18VHJ(DB) Functions and control tester) Normal resistance Several k to several M ( ) Unacceptable resistance Short (0 ) or open 7.3.4 The IPM and outdoor PCB don’t communicate or Related Abnormality outdoor display LED1 flash 4 times Indoor Display Method of Communication is detected by checking the IPM module and the outdoor PCB Malfunction...

  • Page 64: Thermistor Or Related Abnormality (Outdoor Unit)

    Functions and control HSU12/18VHJ(DB) 7.3.5 Thermistor or Related Abnormality(outdoor unit) Frost-removing temperature sensor failure Indoor display: outdoor display: LED1 flash 10 times: Exhaust temperature sensor failure Indoor display: outdoor display: LED1 flash 13 times: Ambient temperature sensor failure Indoor display: outdoor display: LED1 flash 12 times: Suck temperature sensor failure...
  • Page 65 HSU12/18VHJ(DB) Functions and control 7.3.6 Overheat Protection For Exhaust Temperature Indoor display outdoor display LED1 flash 8 times Method of the exhaust temperature control is checked with the temperature being detected Malfunction by the exhaust pipe thermistor Detection Malfunction when the compressor discharge temperature is above 117 Decision Conditions Supposed...
  • Page 66 Functions and control HSU12/18VHJ(DB) Pull out the exhaust sensor and measure its The sensor is damaged. Replace the sensor resistance standard temperatures with a new one. according to the resistance-temperature table The sensor is damaged. Replace the sensor the results deviate with a new one.
  • Page 67 HSU12/18VHJ(DB) Functions and control 7.3.8 Communication error between the indoor and outdoor units Indoor display Outdoor: display LED1 flash 15 times Method of The date received from the another unit in indoor unit-outdoor unit signal transmission is Malfunction checked whether is normal Detection When the date sent from the another unit cannot be received normally,or when the content Malfunction...
  • Page 68 HSU12/18VHJ(DB) Functions and control Check the status of LED1 on the indoor mainboard. If the LED1 blinks measure voltage between Jumpers 3 and 4 of IC8 on the indoor mainboard with a multimeter. Test the outdoor power supply (230VAC and +310VDC) with a multimeter.
  • Page 69 HSU12/18VHJ(DB) Functions and control 7.3.9 Power Supply Over or under voltagve fault Indoor display outdoor display: LED1 flash 6 times 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 Decision Conditions...
  • Page 70 Functions and control HSU12/18VHJ(DB) 7.3.10 Loop of the station detect error Outdoor Display LED1 flash 18 times Indoor Display LED1 flash 19 times Indoor Display Method of The position of the compressor rotor can not detected normally Malfunction Detection Malfunction when the The wiring of compressor is wrong or the connection is poor;...

  • Page 71: Installations

    HSU12/18VHJ(DB) Installations 8. Installations Selection of Installation Place Necessary Tools for Installation Torque wrench Indoor Unit Driver (17mm,22mm,26mm) Nipper Place, robust not causing vibration, where the body can be supported suf ciently. Hacksaw Pipe cutter Place, not affected by heat or steam generated in the vicinity, where inlet and outlet of the Hole core drill Flaring tool unit are not disturbed.
  • Page 72 VHJ(DB) Installations 1. Insert the drain hose into the dent of heat insulation materials of indoor unit. Accessory parts 2. Insert the indoor/outdoor electric cable from backside of indoor unit, and pull it out on the front side, then connect them. 3.
  • Page 73 VHJ(DB) Installations Installation of Outdoor Unit Outdoor unit Drawing for the installation of indoor and outdoor units Install according to Indoor unit Connection of pipes To bend a pipe, give the roundness as large as possible not to crush the pipe , 4G0.75mm and the bending radius should be 30 to 40 mm or longer.
  • Page 74 VHJ(DB) Installations No gas leakage? On Drainage In case of gas leakage, tighten parts of pipe connection. If leakage stops, then proceed 6. steps Please install the drain hose so as to be downward slope without fail. Please don’t do the drainage as shown below. If it does not stop gas leakage, discharge whole refrigerants from the service port.

  • Page 75: Removal Procedure

    HSU12/18VHJ(DB) Removal Procedure 9. Removal Procedure 9.1 For 12K Indoor unit 9.1.1 Removal of Front Panel Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. 1. Features 2. Remove the front panel Hold the front panel by the tabs on the both sides...
  • Page 76 Removal Procedure VHJ(DB) Pull the front panel out horizontally and remove it.
  • Page 77 Removal Procedure VHJ(DB) 9.1.2 Removal of Air Filter Insert the air upwards slightly and then pull it when installing. out downwards. When installing, insert 2 hooks of the...
  • Page 78 Removal Procedure VHJ(DB) 9.1.3 Removal of the blade Release the Insert the air marked hooks. Pull out and when installing. remove the blade. When installing, insert 2 hooks of the...
  • Page 79 Removal Procedure VHJ(DB) 9.1.4 Removal of Front Case Release the screw covers Loosen the 2...
  • Page 80 Removal Procedure VHJ(DB) Loosen the marked hooks. Pull out the front case.
  • Page 81 VHJ(DB) Removal Procedure 9.1.5 Removal of Vertical Blades and Display Board Pull out the Vertical Blades. screws,and remove the display board. Loosen the screw of the drip proof plate. Lift and remove the electrical box.
  • Page 82 VHJ(DB) Removal Procedure 9.1.6 Removal of Fan Drain pan and Electrical Box Loosen the 2 screws. Pull out the drain pan. Discharge the static electricity Loosen the screw of from your body the drip proof plate. before touching the Lift and remove electrical parts like the electrical box.
  • Page 83 Removal Procedure VHJ(DB) 9.1.7 Removal of Fan Motor and Heat Exchanger 1. Remove the right side plate. Loosen the 2 screws. Remove the Lift up the evaporator Be careful not to evaporator. 3. Remove the fan. Loosen the 2 screws.
  • Page 84 Removal Procedure VHJ(DB) Lift up the right part of the fan motor and slide it to the rightward to remove. Lift up the right part of the fan and remove it...
  • Page 85 Removal Procedure HSU12/18VHJ(DB) 9.2 For 18K indoor unit 9.2.1 Removal of Front Panel Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the front panel. Open the front panel to the horizontal position.
  • Page 86 Removal Procedure VHJ(DB) 9.2.2 Removal of Air Filter Step Procedure Points Lift an air filter upwards slightly and then pull it out downwards. Insert the air filters along grooves when installing. When installing, insert 2 hooks of the air filter completely.
  • Page 87 VHJ(DB) Removal Procedure 9.2.3 Removal of Horizontal Blade And Front Grille Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the horizontal The horizontal blade is blade.
  • Page 88 Removal Procedure VHJ(DB) Step Procedure Points Loosen the marked f ive screws Release the marked four hooks. When assembling, install the front grille horizontally so as not to stuff the flap inside. When assembling, make sure the three hooks are caught prop e rly.
  • Page 89 VHJ(DB) Removal Procedure 9.2.4 Removal of Drain pan Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the front grille. Remove the assembly of the reduction motor. 1.
  • Page 90 VHJ(DB) Removal Procedure 9.2.5 . Removal of Vertical Blades and Swing Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Loosen the marked screws Push the hooks on the back of the vertical blades and remove.
  • Page 91 VHJ(DB) Removal Procedure 9.2.6 Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the front grille. Discharge the static electricity from your body 1.
  • Page 92 HSU12/18VHJ(DB) Removal Procedure 9.2.7 Removal of Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points You can detach the indoor unit without removing the assembly of the outlet grille. Loosen the screws Caution fixed to the installation...
  • Page 93 VHJ(DB) Removal Procedure 9.2.8 Removal of Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Loosen the screws. Remove the right side plate.
  • Page 94 HSU12/18VHJ(DB) Removal Procedure 9.3 For 12/18K Outdoor unit 9.3.1 Removal of Outdoor Panel...
  • Page 95 HSU12/18VHJ(DB) Removal Procedure Loosen the top panel screws Lift the top panel...
  • Page 96 HSU12/18VHJ(DB) Removal Procedure Loosen the csrews and pull the panel Domestic air conditioner...
  • Page 97 HSU12/18VHJ(DB) Removal Procedure 9.3.2 Removal of Electrical Box...
  • Page 98 HSU12/18VHJ(DB) Removal Procedure 9.3.3 Removal of Fan and Fan Motor...
  • Page 99 HSU12/18VHJ(DB) Removal Procedure Loosen the fixing screws and remove the motor...
  • Page 100 HSU12/18VHJ(DB) Removal Procedure 9.3.4 Removal of fan motor Bracket and Partition...
  • Page 101 HSU12/18VHJ(DB) Removal Procedure Loosen the screw and remove the reactor...
  • Page 102 HSU12/18VHJ(DB) Removal Procedure 9.3.5 Removal of Computor and Heat Exchanger Loosen the marked screws and pull out the backgurd...
  • Page 103 HSU12/18VHJ(DB) Removal Procedure Remove the compre -ssor and pipe assay Remove the conden -ser...

  • Page 105: Wiring Diagrams

    Appendix HSU12/18VHJ(DB) 10.2 Wiring Diagrams 10.2.1. INDOORUNIT FOR12K RECEIVER DISPLAY...
  • Page 106 Appendix HSU12/18VHJ(DB) FOR18K PIPING TEMP.SENSOR AMBIENT TEMP.SENSOR RECEIVER CN32 DISPLAY RECEIVER CN32 DISPLAY CN48 EMERGENCY SWITCH CN11 CON7 LOUVER MOTOR CON2 CON6 CON1 CON8 ION GENERATOR...
  • Page 107 Appendix HSU12/18VHJ(DB) 10.2.2.Outdoor unit FOR12K CN9 CN8 AC-N AC-L CN11 CN10 CN26 CN22 CN24 CN23 MAIN CONTROL BOARD AC-N AC-L CN10 CN13 CN15 CN14 CN19 CN18 CN17 CN20 CN16 Remark the dotted parts are optional for different unit.
  • Page 108 Appendix HSU12/18VHJ(DB) FOR18K CN9 CN8 AC-N AC-L CN11 CN10 CN26 CN22 CN24 CN23 MAIN CONTROL BOARD AC-N AC-L CN10 CN13 CN15 CN14 CN19 CN18 CN17 CN20 CN16 Remark the dotted parts are optional for different unit.

  • Page 109: Circuit Diagrams

    Appendix HSU12/18VHJ(DB) 10.3. Circuit Diagrams 10.3.1. INDOORUNIT FOR12K...
  • Page 110 Appendix HSU12/18VHJ(DB) FOR18K P1 2SA1037AK CN48 R74 2K R206 CN32 TJC8-02 R40 10K CN32' MODE P4_5/INT0 4.7uF-50V 595-RCK P1_3/KI3/AN11 595-SER P3_6/(INT1) 4.7uF-50V TJC8-02 595-SCK RESET P3_0/TRAO R29 1K P0_5/AN2/CLK1 SWITCH 100uF-16V P0_4/AN3 P1_0/KI0/AN8 dig1 0.1uF R26 1K dig2 0.1uF P3_1/TRBO 0.1uF P6_7/INT3/RXD1 0.01uF...
  • Page 111 Appendix HSU12/18VHJ(DB) +15V FR106(1A-600V-500ns) 10 -1/4W 1.5K-1/4W SCK084R72 10uF-25V-105 310V L7805CV 1A +12V BCK-6-FE1901H 1N4746A(18V-1W 220V-N 1N5399 ER302(3A-200V-35ns) +12V 1N5399 10 -1/4W FR106(1A-600V-500ns) 220V-L 0.1uF 0.1uF LB2271 (32mH-0.35A) 1000uF-35V-105 470uF-16V 1N5399 1N5399 220V-N 10 -1/4W IC10 1N4742A(12V-1W) ICE2A265 CON1 TLP421 TVR14561* 220V-N D250...
  • Page 112 Appendix HSU12/18VHJ(DB) 10.3.2.OUTDOORUNIT FOR12K module board Circuit Diagrams 5.2MH/15A D207 FFA30U60DN PS21965-AT C405 C404 C406 AC -L SGH40N60UF 104/275V 474/275V 680U/400V*2 104/275V R215 D25B X60B 0. 015/5W 0.015/5W AC -N R214 R225 9 10 11 12 13 14 15 16 17 D206 C023 R222...
  • Page 113 Appendix HSU12/18VHJ(DB) +12V L7805CV E22034 102/100V Vout MBR3100\ER302 470U/25V 100U/16V 104/50V 1K/0.5W 472/1KV 104/50V ER106 +5VD 104/275V 20UH/1A MBR1100\SB1100 IN5948B 5.1K/1% 470U/25V 100U/16V 222/250VAC 220 220 R18 47 CN22 +15V R90 0 102/100V MUR115\MUR130\ER106 NCP1200P100 330/1W 470U/25V 104/50V 22U/25V 5.1K/1% IRFUC20 PC817A TL431C...
  • Page 114 Appendix HSU12/18VHJ(DB) FOR18K module board Circuit Diagrams 5. 2MH/15A D207 FFA30U60DN PS21965-AT AC -L C405 C404 C406 SGH40N60UF 104/275V 474/275V 680U/400V*2 104/275V R215 D25B X60B 0. 015/5W 0. 015/5W AC -N R214 R225 9 10 11 12 13 14 15 16 17 D206 C023 R222...
  • Page 115 Appendix HSU12/18VHJ(DB) +12V L7805CV E22034 102/100V Vout MBR3100\ER302 470U/25V 100U/16V 104/50V 1K/0.5W 472/1KV 104/50V ER106 +5VD 104/275V 20UH/1A MBR1100\SB1100 IN5948B 5.1K/1% 470U/25V 100U/16V 222/250VAC 220 220 R18 47 CN22 +15V R90 0 102/100V MUR115\MUR130\ER106 NCP1200P100 330/1W 470U/25V 104/50V 22U/25V 5.1K/1% IRFUC20 PC817A TL431C...

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