Haier HSU-09RS03/R2(SDB) Service Manual
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Haier HSU-09RS03/R2(SDB) Service Manual

Wall mounted type dc inverter s -series
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SERVICE MANUAL

Order No.

Wall mounted Type

DC Inverter
S -Series
Model No. HSU-09RS03/R2(SDB)
HSU-12RS03/R2(SDB)
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-09RS03/R2(SDB)

  • Page 1: Service Manual

    © (Qingdao Haier Air Conditioner General corp.,Ltd) All right reserved .Unauthorized copying and distribution is a violation of law...
  • Page 2 HSU-09/12RS03/R2(SDB) Main function and control specification of indoor unit Main function and control specification of outdoor unit Function of Main thermistor 7. Service Diagnosis Removal of Front Panel Removal of Filter and Blade Removal of Front Grill Removal of Drain Pan 9.5 Removal of Display Assembly Removal of Vertical Blades and Swing Motor...
  • Page 3 HSU-09/12RS03/R2(SDB) ................ 9.10 Removal of Outdoor Panel ................ 9.11 .............. 9.12 Removal of Fan and Fan motor 9.13 Removal of Fan Motor Bracket and Partition 9.14 Removal of Compressor and Heat Exchanger 11 Description of Coding Rules of Unit Model ..........98...

  • Page 4: Safety Cautions

    HSU-09/12RS03/R2(SDB) Introduction 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: Cautions Regarding Products After Repair

    HSU-09/12RS03/R2(SDB) 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 HSU-09/12RS03/R2(SDB) 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: Inspection After Repair

    Introduction HSU-09/12RS03/R2(SDB) 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 HSU-09/12RS03/R2(SDB) 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: List Of Fuctions

    HSU-09/12RS03/R2(SDB) 2 List of fuctions Functions Make your room full of an abundance natural negative Healthy negative ion ions With specialized motor and flaps, the airflow can be Left&right flow adjusted . Avoid the child's wrong operation on the remote Child lock The 3D airflow is able to deliver the airflow horizontally 3D air flow...

  • Page 10: Specifications

    HSU-09/12RS03/R2(SDB) 3 Specifications HSU-09RS03/R2(SDB) HSU-12RS03/R2(SDB) 2.7(0.7~4.0) 3.3(0.9 ~6.0) 3.5(0.7~4.4) (0.9~6.5) 9200(2350~13650) 12000(2350~15000) 14300 (2050~22150) 11250(3050~20450) 2322(602 ~3440) 2838(774 ~5160) (774~5590) 3010(602 ~3784) 3612 5 20(160~1100) 630(180-1710) 920(180 ~2030) (160~1460) 4.22 4.57 5.19 5.24 9.52 9.52 11.7 12.7 11.7 12.7 10.4 11.4 10.4 11.4...
  • Page 11 HSU-09/12RS03/R2(SDB) HSU-09RS03/R2(SDB) HSU-12RS03/R2(SDB) SNB130FGYM2 SNB130FGYM2 FV50S FV50S R410a R410a 1.15 1.15 33.3 33.3 33.3 33.3 1175.5 1175.5 1175.5 1175.5 643X 783X255 643X 783X255 714X930X340 714X930X340 33.5 33.5 36.5 36.5...

  • Page 12: Indoor Unit Connectors

    HSU-09/12RS03/R2(SDB) Connector Wring Diagram 4.1 Indoor unit Connectors Connectors PCB(1) (Control PCB) PCB 1 control PCB 1) CN12,CN13 connector for L&R step motor 2) CN11 connector for Up&down step motor 3) CN26 connector for DC fan motor 4) CON7 connector for communication line between the indoor and outdoor 5) CN1 connector for ambient temp.

  • Page 13: Outdoor Unit

    HSU-09/12RS03/R2(SDB) Connector Wring Diagram 4.2: outdoor unit 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 15V and 5V to the module board 4) CN22 CN23 Connector for CN10,CN11 on the module board 5) CN21 Connector for fan motor 6) CN10 Connector for four way valve coil 7) CN17 CN18 CN19 CN20 Connector for thermistors...
  • Page 14 HSU-09/12RS03/R2(SDB) Connector Wring Diagram CN26 CN24 CN22 CN21 CN23 CN17 CN18 CN19 CN20 CN16 CN10 PCB(1) Domestic Air Conditioner...
  • Page 15 HSU-09/12RS03/R2(SDB) Connector Wring Diagram CN11 CN10 PCB(2) Domestic air conditioner...

  • Page 16: Funcitions And Control

    5.1 Main functions and control specification of indoor unit This specification use for HSU-09/12RS03/R2(SDB) 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 17: Main Functions

    HSU-09/12RS03/R2(SDB) Function and control 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 in cooling mode Limited frequency Limited frequency variables...

  • Page 18: Special Functions

    HSU-09/12RS03/R2(SDB) Function and control 5.1.2.2 When the compressor stops and remains idle for 3 minutes 1. Turn off the air conditioner by remote control; the indoor fan stops operation. 2. The temperature sensing device stops running and the indoor fan operates under wind mode. 3.

  • Page 19: Air Cleaning

    HSU-09/12RS03/R2(SDB) Function and control there are no powerful or silent modes. There is no powerful mode for wind-sending and moisture removing Powerful heating Change the set temperature. With temperature adjusting function The wind volume is the automatic medium When in frost removing mode, the outdoor unit does not accept the communication signal for powerful running Powerful cooling Change the set temperature.

  • Page 20: Sleeping Function

    HSU-09/12RS03/R2(SDB) Function and control 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+2 Ts+1 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 21: Rated Operation

    HSU-09/12RS03/R2(SDB) Function and control 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. 5.1.3.9 IFP Optional Function Press the remote control to select and enter the human perception mode;...

  • Page 22: Temp Display

    HSU-09/12RS03/R2(SDB) Function and control Whether following or avoiding mode is set, the air deflector will oscillate automatically. (3) If humans in several areas move to one area and no change is detected for 30 seconds continuously, it will be handled as one person. Power save control function under human perception mode: Judge the number of human beings and approximate their activities to ensure energy saving control.
  • Page 23 HSU-09/12RS03/R2(SDB) Function and control 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...

  • Page 24: Outdoor Fan Control

    HSU-09/12RS03/R2(SDB) Function and control 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 Heating: Compressor Operation Frequency Hz 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 25: Ptc Output Control

    HSU-09/12RS03/R2(SDB) Function and control 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 ”-5 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 26 HSU-09/12RS03/R2(SDB) Function and control 5.2.6.2 TD High Temperature Protections As long as unit is on, the TD air discharge overheat protection feature will be activated, yet air discharge sensor fault must be alarmed 4 minutes after compressor starts. Abnormal Shutdown Rapid frequency drop 1HZ/s Slow frequency drop (1HZ/10s) Invariable frequency...

  • Page 27: Outdoor Temperature Limit

    HSU-09/12RS03/R2(SDB) Function and control 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 50 HZ, outdoor wind speed is forced at level 1.
  • Page 28 HSU-09/12RS03/R2(SDB) Function and control If the temperature of discharge pipe (used in place of the inner temperature of the compressor) rises abnormally, the operating frequency drops or the operation halts. Indoor heat-exchange sensor 1.The indoor 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 29: Value Of Thermistor

    HSU-09/12RS03/R2(SDB) Function and control 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...

  • Page 30: Function And Control

    HSU-09/12RS03/R2(SDB) Function and control 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 33.7555 -0.98...
  • Page 31 HSU-09/12RS03/R2(SDB) Function and control 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 4.6260 -2.21 2.07 5.2391 4.8304 4.4481 -2.25 2.11 5.0502 4.6510 4.2780 -2.30...
  • Page 32 HSU-09/12RS03/R2(SDB) Function and control 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 0.9860 -4.47 3.98 1.2310 1.0853 0.9556 -4.53 4.03 1.1954 1.0529 0.9263 -4.59 4.08 1.1610 1.0217 0.8980 -4.65...
  • Page 33 HSU-09/12RS03/R2(SDB) Function and control 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 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...
  • Page 34 HSU-09/12RS03/R2(SDB) Function and control 6.2437 5.9687 5.7007 -1.21 1.18 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...
  • Page 35 HSU-09/12RS03/R2(SDB) Function and control 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 1.0910 0.9882 0.8942 -3.69...
  • Page 36 HSU-09/12RS03/R2(SDB) Function and control 130.2371 117.4366 105.7989 -1.87 1.70 122.8484 110.9627 100.1367 -1.85 1.69 115.9272 104.8882 94.8149 -1.83 1.67 109.4410 99.1858 89.8106 -1.81 1.66 103.3598 93.8305 85.1031 -1.80 1.64 97.6556 88.7989 80.6728 -1.78 1.63 92.3028 84.0695 76.5017 -1.76 1.62 87.2775 79.6222 72.5729 -1.74...
  • Page 37 HSU-09/12RS03/R2(SDB) Function and control 12.2280 11.8126 11.4011 -0.83 0.83 11.7102 11.3267 10.9459 -0.81 0.80 11.2172 10.8634 10.5114 -0.78 0.78 10.7475 10.4216 10.0964 -0.75 0.75 10.3000 10.0000 9.7000 -0.75 0.75 9.8975 9.5974 9.2980 -0.76 0.76 9.5129 9.2132 8.9148 -0.80 0.80 9.1454 8.8465 8.5496 -0.84...
  • Page 38 HSU-09/12RS03/R2(SDB) Function and control 2.2347 2.0695 1.9147 -2.49 2.34 2.1652 2.0032 1.8516 -2.54 2.38 2.0983 1.9393 1.7908 -2.59 2.42 2.0337 1.8778 1.7324 -2.63 2.46 1.9714 1.8186 1.6761 -2.68 2.50 1.9113 1.7614 1.6219 -2.73 2.54 1.8533 1.7064 1.5697 -2.78 2.58 1.7974 1.6533 1.5194 -2.83...
  • Page 39 HSU-09/12RS03/R2(SDB) Function and control 0.5891 0.5235 0.4648 -4.98 4.45 0.5891 0.5235 0.4648 -4.98 4.45 0.5743 0.5100 0.4524 -5.04 4.50 0.5743 0.5100 0.4524 -5.04 4.50 0.5600 0.4968 0.4404 -5.10 4.55 0.5600 0.4968 0.4404 -5.10 4.55 0.5460 0.4841 0.4288 -5.16 4.60 0.5460 0.4841 0.4288 -5.16...
  • Page 40 HSU-09/12RS03/R2(SDB) Function and control 1630.2870 1431.2787 1255.4324 -2.45 2.16 1541.5904 1355.6163 1191.0048 -2.43 2.15 1458.1938 1284.3593 1130.2298 -2.41 2.14 1379.7528 1217.2282 1072.8813 -2.40 2.13 1305.9472 1153.9626 1018.7481 -2.38 2.12 1236.4792 1094.3200 967.6334 -2.36 2.11 1171.0715 1038.0743 919.3533 -2.35 2.09 1109.4661 985.0146 873.7359 -2.33...
  • Page 41 HSU-09/12RS03/R2(SDB) Function and control 160.1904 150.4683 141.2090 -1.51 1.44 153.3914 144.2641 135.5577 -1.49 1.42 146.9136 138.3454 130.1598 -1.47 1.40 140.7403 132.6980 125.0027 -1.44 1.38 134.8559 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...
  • Page 42 HSU-09/12RS03/R2(SDB) Function and control 27.0160 25.7110 24.4470 -1.53 1.48 26.1569 24.8685 23.6222 -1.57 1.52 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...

  • Page 43: System Configuration

    HSU-09/12RS03/R2(SDB) 6. System Configuration 6.1 System Configuration 6.2 Instruction...

  • Page 44: Parts And Functions

    HSU-09/12RS03/R2(SDB) Introduction Parts and Functions Indoor Unit Outdoor Unit Inlet Air Purifying Filter (inside) Inlet grille Emergency Switch Display Outlet board OUTLET CONNECTING PIPING Negative Anion AND ELECTRICAL WIRING generator (inside) DRAIN HOSE INLET Horizontal flap Intelligent Vertical blade (adjust up and down air flow (adjust left and Remote controller right air flow)

  • Page 45: Operation

    HSU-09/12RS03/R2(SDB) Introduction Operation Inner side of the controller Load the batteries as illustrated. 2 R-03 operating power is 100W; batteries,resetting key(cylinder); Be sure when the panel display “02”, that the loading is in line with the " + "/"-"; the operating power is SMART SET TEMP.

  • Page 46: Smart Operation

    HSU-09/12RS03/R2(SDB) Introduction Operation COOL,HEAT and DRY Operation SMART Operation (This function is unavailable on some models) Unit start. SMART One key can give you a comfortable room! The air conditioning unit can judge Select operation mode. the indoor temperature and humidity, and make the adjustment accordingly.

  • Page 47: Swing Operation

    HSU-09/12RS03/R2(SDB) Introduction Operation Select TEMP.setting FAN Operation SWING Operation Up and down air flow direction Press TEMP.setting Press TEMP button. Every time the button is pressed, temp. setting For each press of “ ” button, increases 0.5 air flow direction on remote controller displays as follows Every time the button is according to different operation...

  • Page 48: Health Operation

    HSU-09/12RS03/R2(SDB) Introduction Operation HEALTH Operation HEALTH AIRFLOW Operation The setting of The anion generator in the health airflow airconditioner can generate a function lot of anion effectively balance quantity of position and 1).Press the button of health airflow, anion in the air and also to kill appears on the display.

  • Page 49: Timer Operation

    HSU-09/12RS03/R2(SDB) Introduction Operation TIMER Operation POWER/SOFT Operation Set Clock correctly before starting Timer operation.You can let unit start or stop automatically a following times:Before you wake up in the morning,or get back from outside or after POWER Operation you fall asleep at night. Select your desired operation When you need rapid cooling, AUTO...
  • Page 50 HSU-09/12RS03/R2(SDB) Introduction Operation Operation Comfortable SLEEP Comfortable SLEEP 3 hours then stops. Temp. is lower than tem 3 hours then stops. Temp. is lower than temp. setting so that room temperature won’t be too high so that room temperature won’t be too high for your Before going to bed,you can simply press the SLEEP Before going to bed,you can simply press the SLEEP sleep.

  • Page 51: Eco Operation

    HSU-09/12RS03/R2(SDB) Introduction Operation iFP Operation ECO Operation The movement of people in the room can be sensed, Automatic adjusting with the environmental temperature, which can improve the air adjustment efficiency. running with power saving. Press iFP button “ ” is displayed on the remote controller Press ECONOMY button “...
  • Page 52 HSU-09/12RS03/R2(SDB) Introduction Operation FRESH Operation Emergency operation and test operation Exhaust the vitiated air from the room, and inhale fresh air. Emergency Operation: (This function is unavailable on some models.) Use this operation only when the remote controller is defective or lost. When the emergency operation switch is pressed,the"Pi"...
  • Page 53 HSU-09/12RS03/R2(SDB) Introduction 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 installation When abnormality such as burnt-small found, Use an exclusive immediately stop the operation button and of the drainage securely...

  • Page 54: Troubleshooting

    HSU-09/12RS03/R2(SDB) Introduction Trouble shooting Cautions Before asking for service, check the following Do not obstruct or cover the ventilation grille of the air first. conditoner.Do not put fingers or any other things into the inlet/outlet and swing louver. Do not allow children to play with the air conditioner .In no Phenomenon Cause or check points...

  • Page 55: Service Diagnosis

    HSU-09/12RS03/R2(SDB) Service Diagnosis 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 56: Error Codes And Description Indoor Display

    HSU-09/12RS03/R2(SDB) Service Diagnosis 7.4.Error Codes and Description indoor display Code indication Reference Outdoor Description Page indoor (LED1 flash times) Indoorand Outdoor Communication fault between indoor and outdoor units Room temperature sensor failure Indoor Malfunction Heat-exchange sensor failure o i t Communication fault between the IPM and outdoor PCB Outdoor...
  • Page 57 HSU-09/12RS03/R2(SDB) Service Diagnosis 7.4.1Thermistor 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 58 HSU-09/12RS03/R2(SDB) Service Diagnosis 7.4.2 Indoor fan motor malfunction Indoor Display Method of determine The rotation speed detected by the Hall IC during fan motor operation is used to Malfunction abnormal fan motor operation Detection Malfunction when the detected rotation feedback singal don’t receiced in 2 minutes Decision Conditions Supposed...

  • Page 59: Ipm Protection

    HSU-09/12RS03/R2(SDB) Service Diagnosis 7.4.3 IPM protection Outdoor display LED1 flash 2 times 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 60 HSU-09/12RS03/R2(SDB) Service Diagnosis Communication wiring disconnected Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or else parts damage may be occurred. 1) Check whether Terminal CN23 and CN22 on the outdoor mainboard CN10 and CN11 on IPM module 2) Check whether the connected wire between IPM and outdoor 1) Pull out and reinsert the terminals.
  • Page 61 HSU-09/12RS03/R2(SDB) Service Diagnosis Detection Malfunction The thermistor input is above 4.9V or below 0.1V with the power on. Decision Conditions * Note: The values may vary slightly in some models Supposed Faulty connector connection Causes Faulty thermistor Faulty PCB Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or else parts damage may be occurred.
  • Page 62 HSU-09/12RS03/R2(SDB) Service Diagnosis Electrify the machine again and turn it on with the remote controller, then measure the temperature at the exhaust temperature sensor of the compressor on the outdoor unit 1) The cryogen may have been leaked during installation, or there may be leakage in the the temperature piping system.
  • Page 63 HSU-09/12RS03/R2(SDB) Service Diagnosis 7.4.7 The EEPROM Abnormality (Indoor or outdoor unit) Indoor Display Indoor EEPROM error F12 Outdoor EEPROM error Method of the Data detected by the EEPROM are used to determine MCU Malfunction Detection Malfunction when the Data of EEPROM is error or the EEPROM is damaged Decision Conditions Supposed...

  • Page 64: Communication Error Between The Indoor And Outdoor Units

    HSU-09/12RS03/R2(SDB) Service Diagnosis 7.4.8 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 Malfunction When the date sent from the another unit cannot be received normally,or when the content...
  • Page 65 HSU-09/12RS03/R2(SDB) Service Diagnosis 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 66: Power Supply Over Or Under Voltage Fault

    HSU-09/12RS03/R2(SDB) Service Diagnosis 7.4.10 Power Supply Over or under voltage 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 Supposed...

  • Page 67: Loop Of The Station Detect Error

    HSU-09/12RS03/R2(SDB) Service Diagnosis 7.4.11 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; Decision or the compressor is damaged Conditions...
  • Page 68 HSU-09/12RS03/R2(SDB) Service Diagnosis 7.4.12 Over-current of the compressor Outdoor Display LED1 flash 3 or 24 or 25 times Method of The current of the compressor is too high Malfunction Detection Malfunction when the IPM Module is damaged Decision or the compressor is damaged Conditions power supply.

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Hsu-12rs03/r2(sdb)

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