Hyundai HSH-I073NBE Service Manual
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Hyundai HSH-I073NBE Service Manual

Wall mounted split-type air conditioners
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HYUNDAI
WALL MOUNTED SPLIT-TYPE AIR CONDITIONERS

SERVICE MANUAL

HYUNDAI
Models
HSH-I073NBE
HSH-I123NBE
HSH-I243NBE
HSH-L093NDC
HSH-L123NDC
HSH-I093NBE
HSH-I183NBE
No.TE121023

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Summary of Contents for Hyundai HSH-I073NBE

  • Page 1: Service Manual

    HYUNDAI WALL MOUNTED SPLIT-TYPE AIR CONDITIONERS SERVICE MANUAL No.TE121023 HYUNDAI Models HSH-I073NBE HSH-I093NBE HSH-I123NBE HSH-I183NBE HSH-I243NBE HSH-L093NDC HSH-L123NDC...

  • Page 2: Important Notice

    Air Conditioner Service Manual IMPORTANT NOTICE This service manual is intended for use by individuals possessing adequate backgrounds of electrical, electronic and mechanical experience. Any attempt to repair the appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.

  • Page 3: Summary And Features

    Panel BM-S For fixed type For DC inverter 7K/9K Outdoor Unit 12K Outdoor Unit 18K Outdoor Unit 24K Outdoor Unit Models Remarks I：HSH-I073NBE O：HRH-I073NBE I：HSH-I093NBE O：HRH-I093NBE Fixed type I：HSH-I123NBE O：HRH-I123NBE （220~240V/50Hz) I：HSH-I183NBE O：HRH-I183NBE I：HSH-I243NBE O：HRH-I243NBE I: HSH-L093NDC-W O: HRH-L093NDC-W DC inverter...

  • Page 4: Specifications

    Air Conditioner Service Manual Technical specifications Model HSH-I073NBE/I HRH-I073NBE/O Product Code Function COOLING HEATING Rated Voltage 220-240V Rated Frequency 50Hz Total Capacity (W) 2200 2250 Power Input (W) Rated Input (W) Rated Current (A) Air Flow Volume (m3/h) Dehumidifying Volume (l/h) EER / C.O.P (W/W)
  • Page 5 Air Conditioner Service Manual Model of Outdoor Unit HRH-I073NBE Product Code Compressor Manufacturer/trademark QING'AN Compressor Model YZG-E22RY2 Compressor Type Rotary L.R.A. (A) Compressor RLA(A) Compressor Power Input(W) 780±5% Overload Protector B145-140-141E Throttling Method Capillary Starting Method Capacitor Working Temp Range (ºC) 18-43 Condenser Hydrophilic aluminum fin-copper tube...
  • Page 6 Air Conditioner Service Manmual Model HSH-I093NBE/I HRH-I093NBE/O Product Code Function COOLING HEATING Rated Voltage 220-240V Rated Frequency 50Hz Total Capacity (W) 2700 2780 Power Input (W) Rated Input (W) 1085 1000 Rated Current (A) Air Flow Volume (m3/h) Dehumidifying Volume (l/h) EER / C.O.P (W/W) Energy Class Model of Indoor Unit...
  • Page 7 Air Conditioner Service Manmual Model of Outdoor Unit HRH-I093NBE Product Code Compressor Manufacturer/trademark RECHI Compressor Model 44A233AJ-FEKC Compressor Type Rotary L.R.A. (A) Compressor RLA(A) Compressor Power Input(W) 930±5% Overload Protector B175-145B-141C Throttling Method Capillary Starting Method Capacitor Working Temp Range (ºC) 18-43 Condenser Hydrophilic aluminum fin-copper tube...
  • Page 8 Air Conditioner Service Manmual Model HSH-I123NBE/I HRH-I123NBE/O Product Code Function COOLING HEATING Rated Voltage 220-240V Rated Frequency 50Hz Total Capacity (W) 3520 3660 1280 1004 Power Input (W) Rated Input (W) 1420 1310 Rated Current (A) Air Flow Volume (m3/h) Dehumidifying Volume (l/h) EER / C.O.P (W/W) Energy Class...
  • Page 9 Air Conditioner Service Manmual Model of Outdoor Unit HRH-I123NBE Product Code Compressor Manufacturer/trademark RECHI Compressor Model 48A313PM-55KF Compressor Type Rotary L.R.A. (A) Compressor RLA(A) Compressor Power Input(W) 1245±5% Overload Protector B290-150B-241E Throttling Method Capillary Starting Method Capacitor Working Temp Range (ºC) 18-43 Condenser Hydrophilic aluminum fin-copper tube...
  • Page 10 Air Conditioner Service Manmual Model HSH-I183NBE/I HRH-I183NBE/O Product Code Function COOLING HEATING Rated Voltage 220-240V Rated Frequency 50Hz Total Capacity (W) 5280 5420 1900 2150 Power Input (W) Rated Input (W) 2135 1950 Rated Current (A) Air Flow Volume (m3/h) Dehumidifying Volume (l/h) EER / C.O.P (W/W) Energy Class...
  • Page 11 Air Conditioner Service Manmual Model of Outdoor Unit HRH-I183NBE Product Code Compressor Manufacturer/trademark HIGHLY Compressor Model ASH201SV-C8LU Compressor Type Rotary L.R.A. (A) Compressor RLA(A) Compressor Power Input(W) 1650 Overload Protector Throttling Method Capillary Starting Method Capacitor Working Temp Range (ºC) 18-43 Condenser Hydrophilic aluminum fin-copper tube...
  • Page 12 Air Conditioner Service Manmual Model HSH-I243NBE/I HRH-I243NBE/O Product Code Function COOLING HEATING Rated Voltage 220-240V Rated Frequency 50Hz Total Capacity (W) 7030 7180 2900 2700 Power Input (W) Rated Input (W) 2830 2575 13,2 12,3 Rated Current (A) Air Flow Volume (m3/h) Dehumidifying Volume (l/h) EER / C.O.P (W/W) Energy Class...
  • Page 13 Air Conditioner Service Manmual Model of Outdoor Unit HRH-I243NBE Product Code Compressor Manufacturer/trademark HIGHLY Compressor Model ASH264SV-C8LU Compressor Type Rotary L.R.A. (A) Compressor RLA(A) 10.3 Compressor Power Input(W) 2215 Overload Protector Throttling Method Capillary Starting Method Capacitor Working Temp Range (ºC) 18-43 Condenser Hydrophilic aluminum fin-copper tube...
  • Page 14 Air Conditioner Service Manmual Model HSH-L093NDC HRH-L093NDC Product Code Function COOLING HEATING Rated Voltage 220-240V Rated Frequency 50Hz Total Capacity (W) 2703 (1110-3080) 2724 (1230-3810) 760(300-1220) 660(300-1050) Power Input (W) Rated Input (W) 1050 1220 Rated Current (A) Air Flow Volume (m3/h) Dehumidifying Volume (l/h) EER / C.O.P (W/W) Energy Class...
  • Page 15 Air Conditioner Service Manmual HRH-L093NDC-W HRH-L093NDC-S Model of Outdoor Unit Product Code Compressor Manufacturer/trademark GMCC Compressor Model DA89X1C-20FZ3 Compressor Type Rotary L.R.A. (A) Compressor RLA(A) 4.75±5% Compressor Power Input(W) 705±5% Overload Protector INT01L-4639 Throttling Method Capillary Starting Method Capacitor Working Temp Range (ºC) 18-44 Condenser Hydrophilic aluminum fin-copper tube...
  • Page 16 Air Conditioner Service Manmual Model HSH-L123NDC HRH-L123NDC Product Code Function COOLING HEATING Rated Voltage 220-240V Rated Frequency 50Hz Total Capacity (W) 3503 (1520-3960) 4323 (1610-4840) 875(400-1350) 1050(400-1700) Power Input (W) Rated Input (W) 1350 /1700 Rated Current (A) /7.7 Air Flow Volume (m3/h) Dehumidifying Volume (l/h) EER / C.O.P (W/W) Energy Class...
  • Page 17 Air Conditioner Service Manmual HRH-L123NDC-W HRH-L123NDC-S Model of Outdoor Unit Product Code Compressor Manufacturer/trademark GMCC Compressor Model DA108M1C-81EZ8 Compressor Type Rotary L.R.A. (A) Compressor RLA(A) 4.6±5% Compressor Power Input(W) 865±5% Overload Protector Throttling Method Capillary Starting Method Capacitor Working Temp Range (ºC) 18-45 Condenser Hydrophilic aluminum fin-copper tube...

  • Page 18: Product View And Parts

    Air Conditioner Service Manual Louver Pipes and Power...
  • Page 19 Air Conditioner Service Manmual...

  • Page 20: Product Dimensions

    Air Conditioner Service Manual Product Dimensions Indoor Unit 20 mm 57 mm 400 mm Outdoor Unit Unit: mm Capacity 7K&9K 439.2 507.8 753.5...

  • Page 21: Wiring Diagram

    Air Conditioner Service Manual WIRING DIAGRAM MODEL:HSH-I073NBE,HSH-I093NBE,HSH-I123NBE INDOOR UNIT: OUTDOOR UNIT...
  • Page 22 Air Conditioner Service Manual WIRING DIAGRAM MODEL:HSH-I183NBE INDOOR UNIT: OUTDOOR UNIT...
  • Page 23 Air Conditioner Service Manual WIRING DIAGRAM MODEL:HSH-I243NBE INDOOR UNIT: OUTDOOR UNIT...
  • Page 24 Air Conditioner Service Manual Product Dimensions Indoor Unit 20 mm 57 mm 400 mm Outdoor Unit Unit: mm Capacity 9K&12K 507.8...
  • Page 25 Air Conditioner Service Manual WIRING DIAGRAM MODEL: HSH-L093NDC-W,HSH-L093NDC-S INDOOR UNIT: OUTDOOR UNIT...
  • Page 26 Air Conditioner Service Manual WIRING DIAGRAM HSH-L121NDC-W, HSH-L121NDC-S MODEL: INDOOR UNIT: OUTDOOR UNIT...

  • Page 27: Operation Details

    Air Conditioner Service Manual Operation Details Remote controller TEMP UP button Increase the temperature or time by 1 unit. TEMP DOWN button Decrease the temperature or time by 1 unit. ON/OFF button FEEL SPEED To switch the conditioner on and off. AUTOQUIET COOL POWERFUL...
  • Page 28 Air Conditioner Service Manual Electronic controller: 1.Automatic mode 1) Initial RT determines the working mode and ST,the mode is determined effective only once unless A/C shut-down then re-started. If from other modes switches to autoamatic mode (including mode conversion after shutdown), it should be that the compress stop more than 3 min then temperature judgement and automatic mode are conducted (it can conduct immediately from fan mode switched to automatic, the indoor fan stops, three minutes later the response is made and start up).
  • Page 29 Air Conditioner Service Manual 3, Dry mode running into this mode, the Air cond. firstly operates for 3 minutes according to cooling mode (set temperature is 7℃) , and then takes the detected backflow air temperature minus 2℃ as a new set temperature (the minimum value of 5℃) and runs according to cooling mode, indoor fan operates at low-speed, at this moment the setting operation of Fan speed is invalid but Swing is adjustable.
  • Page 30 Air Conditioner Service Manual Condition 1：As shown in figure 3 Defination: The followings are all required to meet: a. IPT1 settles for IPT1＝IPTmax－△IPT（8℃） b. t5≥50min （running time t5≥50min （the compressor runs cumulatively） ， t5 is removable， and could be less than t1） c.
  • Page 31 Air Conditioner Service Manual accumulative total 30min, then the machine runs into defrosting and last for 8 min. if the accumulative total less than 30min, but accord with one of the condition option 1-3 them the machine runs into defrosting at the option 1-3 and the accumulative tota time restarts from 0. Conditions for quitting defrostng (1) The quitting conditions for option 1 and option 2, the machine quits from defrosting if any one below condition met.
  • Page 32 Air Conditioner Service Manual indoor fan motor is running at setting speed (the speed is same as that of heating). 2) Vane motor control: running according to the setting. 3) The outdoor unit is not working under fan mode. 6. Sleeping mode 1) Under sleep mode, the indoor fan motor is running at a low-airflow speed，except that the power light and sleep light are on, timer light is on/off according to the setting state, running light is off.
  • Page 33 Air Conditioner Service Manual 1) Compressor’s protection function: a．The PCB which has Power-off memory function, once this function is started up,the compressor goes along 3min delay protection when power on. If the PCB hasn’t been started up this function, even when the PCB is power-on, the compressor doesn’t process 3 min delay function. b．Compressor’s 3 min interval protection: the compressor can’t start-up until 3 min later(except for defrosting process).
  • Page 34 Air Conditioner Service Manual Failure code: For the machine has LED, the code displays on LED, for no LED machine, the code reflects by the running light. Failure Running Light Flash LED Display RT Sensor Failure Once / Period IPT Sensor Failure Twice / Period Indoor Fan Motor Failure 6 times / Period...
  • Page 35 Air Conditioner Service Manual EXPLOSION VIEW MODEL: HSH-I073NBE,HSH-I093NBE,HSH-I123NBE,HSH-I183NBE INDOOR UNIT:...
  • Page 36 Air Conditioner Service Manual EXPLOSION VIEW Model: HRH-I243NBE INDOOR UNIT...
  • Page 37 Air Conditioner Service Manual EXPLOSION VIEW Mode: HSH-I073NBE OUTDOOR UNIT:...
  • Page 38 Air Conditioner Service Manual EXPLOSION VIEW MODEL: HSH-I093NBE,HSH-I183NBE OUTDOOR UNIT:...
  • Page 39 Air Conditioner Service Manual EXPLOSION VIEW Model: HRH-I123NBE OUTDOOR UNIT...
  • Page 40 Air Conditioner Service Manual EXPLOSION VIEW MODEL: HSH-I243NBE OUTDOOR UNIT:...
  • Page 41 Air Conditioner Service Manual Indoor Unit- HSH-I073NBE Part No. Part Name Q’ty Remark 1080030003 Installation Plate 1210250103 Base 1070020017 Cross Fan 1070100010 Bearing Mount 1210231201 Evaporator 1070250016 Water Drainage Assembly 1070320440 Vertical Vane Assembly 1070250419 Face Frame 1070320112 Screw Cover...
  • Page 42 Air Conditioner Service Manual Indoor Unit- HSH-I093NBE Part No. Part Name Q’ty Remark 1080030003 Installation Plate 1210250103 Base 1070020017 Cross Fan 1070100010 Bearing Mount 1210231201 Evaporator 1070250016 Water Drainage Assembly 1070320440 Vertical Vane Assembly 1070250419 Face Frame 1070320112 Screw Cover 1090251109 Display PCB 1070250425...
  • Page 43 Air Conditioner Service Manual Indoor Unit- HSH-I123NBE Part No. Part Name Q’ty Remark 1080030008 Installation Plate 1210320107 Base 1070020026AA Cross Fan 1070100010 Bearing Mount 1110050067 Evaporator 1070320011 Water Drainage Assembly 1070320440 Vertical Vane Assembly 1070320445 Face Frame 1070320112 Screw Cover 1090251109 Display PCB 1070250425...
  • Page 44 Air Conditioner Service Manual Indoor Unit- HSH-I183NBE Part No. Part Name Q’ty Remark 1080030021 Installation Plate 1070350872 Base 1070020024AA Cross Fan 1070100010 Bearing Mount 1110050268 Evaporator 1070350221 Water Drainage Assembly 1070350141 Vertical Vane Assembly 1070500250 Face Frame 1070350135 Screw Cover 1090500118 Display PCB 1070250425...
  • Page 45 Air Conditioner Service Manual Indoor Unit- HSH-I243NBE Part No. Part Name Q’ty Remark 1080030021 Installation Plate 1070350872 Base 1070020024AA Cross Fan 1070100010 Bearing Mount 1110050717 Evaporator 1070350221 Water Drainage Assembly 1070350141 Vertical Vane Assembly 1070500250 Face Frame 1070350135 Screw Cover 1090500118 Display PCB 1070250425...
  • Page 46 Air Conditioner Service Manual Outdoor Unit- HRH-I073NBE Part No. Part Name Q’ty Remark 1071990064 Grille Optional 1081990014 Top Cover 1110061064 Condenser 1081990018 Outdoor Motor Supporter 1170040062 Outdoor Motor 1070030006AA Propeller Fan 1081990011 Left Grille Supporter 1080320147 Left airproof plate 1081990016 Front Plate 1071990044 Fan Guard...
  • Page 47 Air Conditioner Service Manual Outdoor Unit- HRH-I093NBE Part No. Part Name Q’ty Remark 1071990038 Grille Optional 1081990014 Top Cover 1110061049 Condenser 1081990018 Outdoor Motor Supporter 1170040062 Outdoor Motor 1070030006AA Propeller Fan 1081990011 Left Grille Supporter 1081990016 Front Plate 1071990044 Fan Guard 1100170041 Compressor And It Accessories 1120110002...
  • Page 48 Air Conditioner Service Manual Outdoor Unit- HRH-I123NBE Part No. Part Name Q’ty Remark 1071990039 Grille Optional 1080320105 Top Cover 1110060953 Condenser 1080050004 Outdoor Motor Supporter 1170040058 Outdoor Motor 1070030051AA Propeller Fan 1080050001 Left Grille Suppoeter 1080320113 Front Plate 1080320112 Fan Guard 1100110016 Compressor And It Accessories 1120110016...
  • Page 49 Air Conditioner Service Manual Outdoor Unit- HRH-I183NBE Part No. Part Name Q’ty Remark 1071990040 Grille Optional 1080050011 Top Cover 1110060851 Condenser 1080050004 Outdoor Motor Supporter 1170040059 Outdoor Motor 1070030038AA Propeller Fan 1080050001 Left Grille Supporter 1080050009 Front Plate 1080320112 Fan Guard 1100020033 Compressor And It Accessories 1120500226...
  • Page 50 Air Conditioner Service Manual Outdoor Unit- HRH-I243NBE Part No. Part Name Q’ty Remark 1071990041 Grille Optional 1081990038 Top Cover 1110061045 Condenser 1081990042 Outdoor Motor Supporter 1170040105 Outdoor Motor 1170120146AA Propeller Fan 1081990040 Left Grille Supporter 1081990047 Front Plate 1071990045 Fan Guad 1100020032 Compressor And It Accessories 1120110017...
  • Page 51 TCL Air Conditioner Service Manual Operation Details Remote controller TEMP UP button Increase the temperature or time by 1 unit. TEMP DOWN button Decrease the temperature or time by 1 unit. ON/OFF button To switch the conditioner on and off. FAN SPEED button To select the fan speed of auto/low/mid/high.
  • Page 52 Air Conditioner Service Manual Electronic Controller Safety Protection (1) Time Delay for Safety protection 3 minutes delay for compressor ---The compressor is ceased for 3minutes before restarting to balance the pressure in the refrigeration cycle in order to protect the compressor.
  • Page 53 Air Conditioner Service Manual (1) Compressor frequency control According to difference room temperature and set temperature(δt = RT-ST), running frequency of compressor is controlled by electronic controller. When room temperature is much higher than set temperature, compressor will start at a high frequency, and as room temperature goes down, compressor running frequency will go down.
  • Page 54 Air Conditioner Service Manual T e m p e r a t u r e u p s e t t i n g 37℃ l o w f a n 34℃ 33℃ b r e e z e 30℃ 25℃...
  • Page 55 Air Conditioner Service Manual c o m p r e s s o r O F F 4 - w a y v a lv e O F F o u t d o o r f a n m o t o r O F F 2 0 s 1 0 s...
  • Page 56 Air Conditioner Service Manual some reason, when power supply come back again, the AUTO-RESTART function will set synchronously and automatically to work. So the air conditioner would work at the same mode before. Auto-restart Pre-setting (optional): If Auto-restart function is needed, follow the steps below to activate this function: 1) Pulling the air-con's plug out of socket.
  • Page 57 Air Conditioner Service Manual Protection display code list: Protection type LED CODE DIGITAL LED CODE higher or lower voltage RUN-winking,TIMER-1 time/8s Over current RUN- winking,TIMER-2 times /8s Discharge temperature RUN- winking,TIMER-4 times /8s Over cooling in cooling mode RUN-light,TIMER-5 times /8s Over heating in cooling mode RUN- light,TIMER-6 times /8s Over heating in heating mode...
  • Page 58 Air Conditioner Service Manual EXPLOSION VIEW Mode: HSH-L093NDC-W,HSH-L123NDC-S INDOOR UNIT:...
  • Page 59 Air Conditioner Service Manual Indoor Unit- HSH-L093NDC-W,HSH-L093NDC-S Part No. Part Name Q’ty Remark Installation Plate Base Cross Fan Bearing Mount Evaporator Water Drainage Assembly Vertical Vane Assembly Face Frame Screw Cover Display PCB (digital) Display PCB Box Left Air Filter Right Air Filter Front Panel Power Supply Cord...
  • Page 60 Air Conditioner Service Manual EXPLOSION VIEW MODEL: HSH-L093NDC-W,HSH-L093NDC-S OUTDOOR UNIT:...
  • Page 61 Air Conditioner Service Manual OUTDOOR UNIT Model: Part No. Part Name Q’ty Remark Grille Top cover Condenser Outdoor motor supporter Outdoor motor Propeller fan Left grille supporter Front plate Fan guard Compressor and accessories 4-way valve 4-way valve assembly Base Right plate Two-way valve Valve supporter...
  • Page 62 Air Conditioner Service Manual ANNEX 1 TROUBLE SHOOTING INDEX 1. Electric parts 2. Refrigerant system 3. Troubleshooting 4. Installation Fundamentals...

  • Page 63: Electric Parts

    Air Conditioner Service Manual 1. Electric parts It is compressor and motor fan that finally drives after power is supplied. And it is necessary to check the inter- nal factors like switches, protectors, or lead wires that are needed to reach the compressor and motor fan to see if their connections are normal and the external factors to see if voltage is normally supplied.
  • Page 64 Air Conditioner Service Manual 3) Wire thickness required Rated current appliance(A) Nominal cross-sectional area(mm Up to and including 6 0.75 Over 6 up to and including 10 Over 10 up to and including 16 Over 16 up to and including 25 Over 25 up to and including 32 Over 32 up to and including 40 Over 40 up to and including 63...
  • Page 65 Air Conditioner Service Manual 1.2.3 Running capacitor 1) Earth inspection between terminal and body As shown in Figure 1, connect a resistor between one side terminal and body of condenser to check for continuity. 2) Capacity inspection (1) Remove the lead wire from both terminals of condenser to be checked. (2) Contact both terminals of lead wire for 2-3 sec., and discharge.
  • Page 66 Air Conditioner Service Manual Measuring main coil resistance : White Black Measuring sub coil resistance : Brown Black Black Brown Measuring control coil resistance : Red Black O.L.P White 1.2.5 Thermostat There are 3 kinds of thermostat malfunction. 1) Leak of gas charged in sensor part 2) Short of contact point 3) Wrong wiring Switch off at room temperature 18-30°C, turn carefully the knob of thermostat from 1 to 10 (the number may...
  • Page 67 Air Conditioner Service Manual 1.3 Compressor trouble diagnosis 1.3.1 Electrical troubles 1) Ground test Test single phase and three phase in the same manner. (1) Shut off the power supply to product. (2) Remove the wires connected to the compres- sor terminal.
  • Page 68 Air Conditioner Service Manual 1.3.2 Mechanical troubles 1) Not starting (1) Phenomenon : Compressor is not started but the starting current continues to flow. (2) Checking a) Check capacitor. (for a type where a capacitor for compressor starting or operating is used) b) If there is no trouble, it is judged as lock due to the wear of compressor inside or the damage of lubricating device.

  • Page 69: Refrigerant System

    Air Conditioner Service Manual 2. Refrigerant system 2.1 Refrigerant system troubleshooting Check the following items when troubleshooting the refrigerant system. 1) The thermostat setting or remocon temperature setting is not wrong? 2) Air filter is not cleaned? 3) Blower fan control switch is not at "low"? 4) Ventilation lever is not opened? 5) There is no obstacle in suction or discharge side of outdoor unit? 6) Dirty heat exchanger causes the heat exchanging efficiency to be down?
  • Page 70 Air Conditioner Service Manual 2.1.2 Pressure and temperature of refrigerant Capillary Tube High pressure (Liquid side)tube Accumulator Low pressure(Gas side) tube Compressor The pressure in normal condition shows the figure in the right side Measuring place Pressure(kg/cm table, but the pressure (P1) of high pressure side tube is affected greatly by the temperature change and about 16kg/cm .G in a low About19.5...
  • Page 71 Air Conditioner Service Manual • Pressure measurement of low pressure side Closed Closed As shown in Figure above, connect the manifold gauge to the low pressure (gas side) tube of condenser and mea- sure the pressure. 2.1.3 Symptoms and actions 1) Short of refrigerant The short of refrigerant appears in a slightly different symptom as (1) no refrigerant or (2) short of refrigerant.
  • Page 72 Air Conditioner Service Manual 3) Overcharge (1) Symptoms : • The temperature difference of suction-discharge air is 8°C or less, the running current is higher than the specified current, the pressure of low pressure side is high, and the compressor and suction pipe are cold. If running in the condition, pressure switch activates at overload operation to make continuous operation impossible, compressor is difficult to start, and fuse or breaker is easy to be disconnected.
  • Page 73 Air Conditioner Service Manual 2.1.4 Summary of check items by cause Check item Suction/discharge air Rated current Low pressure High pressure temp.diff. of evaporator Cause Cooling Heating Cooling Heating Cooling Heating Cooling 8°C Heating 14°C Short of refrigerant ¢ ¢ ¢...

  • Page 74: Troubleshooting

    Air Conditioner Service Manual 3. Troubleshooting 3.1 Product does not operate at all. Power receptable voltage Product input voltage Power supply voltage check Evaportor-condenser connecting pipe PCB assy (fuse, varistor, pattern) Power input voltage Connector contact check Driving load terminal Display PCB connector AC about 14±3V (General model)
  • Page 75 Air Conditioner Service Manual 3.2 Room fan does not operate at all. Motor output connector Connector contact check Motor capacitor Motor bearing inserted Motor-related parts check state Fan(Blower) fixed state Fan(Blower) contact state Coil resistance (TP) Motor detail check Motor capacitor Motor insulation resistance Communication effor Error code check...
  • Page 76 Air Conditioner Service Manual 3.3 Compressor or outdoor fan does not operate at all. Re-input after power off Set the desired temperature of remocon to be lower by 2°C or over than room temperature, and start the cooling operation. Repeat running/stopping at Does not operate at all.
  • Page 77 Air Conditioner Service Manual 3.4 Up/down vane does not operate at all. Vane bending, structures interferance check Motor shaft assembly check If a constant torque is felt when rotating vane by hands, the assembled condition is normal. Connector check (Disconnection/short circuit/malconnection) Blower operating condition check...
  • Page 78 Air Conditioner Service Manual 3.5 Left/right louver does not operate at all. Louver/link/cam assembly check Motor shaft assembly check If a constant torque is felt when rotating louver by hands, the assembled condition is normal. Connector check (Disconnection/short circuit/malconnection) Blower operating condition check At the moment the room fan is stopped, louver auto swing is stopped, and if room fan is started, auto swing is...
  • Page 79 Air Conditioner Service Manual 3.6 Function setting by remocon is disable. Power input after power off Operation ON by remocon • UCheck the transmission signal of remocon - If there is no remocon transmission signal, - Liquid crystal remocon: signal blinked check the battery or remocon operation.
  • Page 80 Air Conditioner Service Manual 3.7 Cooling/heating conversion is disable. Heating operation ON by remocon If the reversing valve (4-way valve) is ON, "tick" sounds. Connector check 4-way valve connection check outdoor unit connecting wire check PCB ass'y check 4-way valve relay output = ON Switchover into cooling operation by remocon, and after about 30 sec., check the 4-way valve relay output = 4-way valve OFF...
  • Page 81 Air Conditioner Service Manual 4. Installation Fundamentals Case-1 Leakage /Freon - 1/4 Key Factor Pipe cutting Troubles & Gas leaks due to the mal-flared copper pipes with non-rectangular section. Causes Defect Details Pipe cutter Cutting curved pipe leads mal-rectangular section. And it makes gas leakage.
  • Page 82 Air Conditioner Service Manual Leakage /Freon - 2/4 Case-2 Key Factor Removing burrs of pipes. Troubles & Gas Leaks due to the burrs caused by cutting and not removing properly. Causes Defect Details Burrs not removed properly after cutting. • Flaring the pipe with burrs(not removed after cutting) can make freon gas leakages.
  • Page 83 Air Conditioner Service Manual Leakage /Freon - 3/4 Case-3 Factor Flaring works Troubles & Gas leaks and connecting troubles on tubings caused by the inaccurate sizing during flaring Causes works. Defect Details Pipe worked with small sized Pipe worked with large b will make small contact sized b won't be with nut and gas leak against...
  • Page 84 Air Conditioner Service Manual Leakage /Freon - 4/4 Case-4 Factor Flare nut's fastening. Troubles & Damaged flares by over-fastening make gas leakages. Causes And incompletely fastened nuts too. Defect Details Damaged Flares by over-fastening Incompletely fastened nuts Outdoor Side Indoor Side Guidelines Fastening Torques of Flare Nuts Torque-wrench is required for proper fastenings.
  • Page 85 Air Conditioner Service Manual Case-5 Leakage / Drainage - 1/5 1. Indoors leveling Factor 2. Drain hose connecting. Troubles & Water leaks caused by the inclined indoor unit and the drain hose's bad connecting. Causes Defect Details 2. Mal-linked drain hose 1.
  • Page 86 Air Conditioner Service Manual Case-6 Leakage / Drainage - 2/5 1. Drain hose extend(adding another hose). Factor 2. Drain hose laying. Troubles & Water leaks came from the extending or laying work of drain hose. Causes Defect Details 2. Curved or upward drain hose. 1.
  • Page 87 Air Conditioner Service Manual Leakage / Drainage - 3/5 Case-7 Factor Drain piping and ending. Troubles & Water leaks caused by upwarded drain hose along the wall-through hole and clogged drain Causes hose with water. Defect Details 1. Upwarded drain hose along the wall-through 2.
  • Page 88 Air Conditioner Service Manual Leakage / Drainage- 4/5 Case-8 Factor Insulation work on connecting parts and hidden parts of tubings. Troubles & Water leaks caused by wrong insulation works on tubing lines. Causes Defect Details 1. Incomplete insulation works on tube 2.
  • Page 89 Air Conditioner Service Manual Leakage / Drainage -5/5 Case-9 Factor Tubing and taping works against the waterdrops. Troubles & Water leaks by the waterdrops led by wrong tubing and taping works. Causes Defect Details 1. Pipe from upside lead waterdrops(rain, drainage etc.) into the room.
  • Page 90 Air Conditioner Service Manual Freon shortage Case-10 Factor Tube Extending and freon adding. Troubles & Cooling capacity downs by the freon shortage. Causes Defect Details 1. Not adding freon for extended tubings. 2. Gas leakage on welded points for extending tubings.
  • Page 91 Air Conditioner Service Manual Case-11 Cooling capacity - 1/5 Factor Spacing for the air flows in split type air conditioners. Troubles & Cooling capacity downs by bad air flows. Causes Defect Details 1. The space for air intake is too narrow. 2.
  • Page 92 Air Conditioner Service Manual Cooling capacity - 2/5 Case-12 Factor Spacing for the air flows in window type air conditioners. Troubles & Cooling capacity downs by bad air flows. Causes Defect Details 1. The space for air intake is too narrow. 2.
  • Page 93 Air Conditioner Service Manual Cooling capacity - 3/5 Case-13 Factor Improper installation and awning for outdoor unit. Troubles & Cooling capacity downs by improper air flows and awning. Causes Defect Details 1. The outdoor shut in a verandah does not work normally. (The air around the outdoor unit arise too high) Verandah 2.
  • Page 94 Air Conditioner Service Manual Cooling capacity - 4/5 Case-14 Factor Using crushed tubes and changed tubes. Troubles & Cooling capacity downs by the crushed tubes and changed tubes. Causes Defect Details 1. Crushed tube by improper bending works. Crushed area 2.
  • Page 95 Air Conditioner Service Manual Case-15 Cooling capacity - 5/5 Factor Long distance tubings. Troubles & Cooling capacity downs by long distance tubings. Causes Defect Details Installed too high beyond recommended height difference between indoor and outdoor unit. Nth. 3rd. Higher than recommended 2rd.
  • Page 96 Air Conditioner Service Manual Noise - 1/2 Case-16 Factor Unstable installing units. Troubles & Noise from the unstably installed parts and units. Causes Defect Details 1. Unstable installed outdoor unit. 2. Released fittings and fasteners. Duct Indoor unit Slanted Guidelines Install the unit balanced stably using specified legs etc.
  • Page 97 Air Conditioner Service Manual Noise - 2/2 Case-17 Factor Unstably fixed tubings. Troubles & Noise and vibration form the tubings. Causes Defect Details Unstable fixing of surplus tubings will make vibrations and noises during the compressor's running. Guidelines Cut away the surplus tubings. But if there are any surplus tubings left for some reasons, be sure to fix them stably with fixing bands.
  • Page 98 Air Conditioner Service Manual Case-18 Wiring mistake -1/2 Factor Wiring in 3 phase electric power lines. Troubles & Major electrical problems(not operating properly) by bad wirings. Causes Defect Details 1. Not firmly fixed screws of electric power 2. Wiring mistake of fan's electric power lines lines.(It can be led to critical accidents) for outdoor.(Fan rotates reversely and the unit will be shutdown with overload.)
  • Page 99 TCL Air Conditioner Service Manual Air Conditioner Service Manual Wiring mistake -2/2 Case-19 Factor Poor electric insulation. Troubles & Major electrical problems(not operating properly) by bad insulations of connecting cables. Causes Defect Details Poor electric insulations of connecting cables between indoor and outdoor. Insulation break (Badly insulated or damaged cables) To indoor...
  • Page 100 Air Conditioner Service Manual Bad smells & Gases Case-20 Factor Bad smells and gases delivered by drain line. Troubles & Bad smells and gases from outside(Ex. ditch) are discharged from the system. Causes (Be careful not to be confused as if it's from the system). Defect Details Discharging bad smells &...

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