LG Therma V HM161MU33 Troubleshooting Manual
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LG Therma V HM161MU33 Troubleshooting Manual

LG Therma V HM161MU33 Troubleshooting Manual

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Summary of Contents for LG Therma V HM161MU33

  • Page 1 Trouble Shooting Guide Visual Elements Logo Life’s Good...

  • Page 2: Navigation Bar

    Navigation Bar The different category are shown at the side. So, you can go directly to the index page with a single click.

  • Page 3: Table Of Contents

    Ⅰ. Basic Part Ⅴ. Checking Method for Key Components 1. Unit Conversion 2. Saturation temperature / Saturation 1. Flow Switch pressure table_R410A 2. Water Pump 3. P-H Diagram_R-410A 3. Electric Heater 4. P-H Diagram_R32 4. Remote Controller 5. Compressor 6. Fan Motor Ⅱ.

  • Page 4: Unit Conversion

    I. Basic Part 1. Unit Conversion 2. Saturation temperature / Saturation pressure table_R410A 3. P-H Diagram_R-410A 4. P-H Diagram_R32...
  • Page 5 2315.76 2309.03 2300 39.71 39.82 2623.00 2615.82 2600 44.62 44.73 2959.61 2952.13 2950 49.84 49.95 3328.02 3320.49 3400 55.91 56.01 3731.18 3724.00 3700 59.61 59.70 4173.11 4166.98 4200 65.28 65.34 4746.09 4706.31 4700 70.17 70.17 LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 6 3. P-H Diagram_R410A 4. P-H Diagram_R32 Thermodynamic Properties of R32 <Pressure-Enthalpy Graph> Pressure MPa LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 7: Nomenclature

    II. Therma V Introduction 1. Nomenclature 2. Line Up / Capacity 3. Cycle Diagram 4. Piping Diagram 5. Wiring Diagram 6. Exploded View & Part list 7. LGMV Checking Point 8. Accessory Checking Point...
  • Page 8 H : Domestic Hot heating only M : Monobloc type T : High temperature heating heat pump Platform (Chassis code) Serial number K : K2,K3 Chassis 3 Series B : DHW tank integrated Flatform Serial number LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 9 2 : R410A N : Indoor unit of Split type 3 : R32 U : Outdoor unit of Split type M : Monobloc type Platform (Chassis code) 4 : U4 Chassis 3 : U3 Chassis Serial number LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 10: Cycle Diagram

    Solar thermal system Basic Installation DHW Tank is installed is connected (DHW tank is necessary) (Solar thermal kit is necessary) - 4 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 11: Piping Diagram

    THER- MAL (no connector) - To utilized hot water heated by (sold separately) SYSTEM SOLAR THERMAL SYSTEM, Inlet IHEX temperature sensor CN_VI_IN end-user must by LG AWHP Outlet IHEX temperature sensor CN_VI_OUT Solar-Kit. Outlet evaporator CN_PIPE_OUT Inlet evaporator temperature sensor CN_PIPE_IN...
  • Page 12 Solar panel, Sensors, Thermostats, Interim heat party accessory and Field installation (sold THERMAL exchanger, Water pump, etc. (no connector) separately) SYSTEM - To utilized hot water heated by SOLAR THERMAL SYSTEM, end-user must by LG AWHP Solar-Kit. LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 13: Wiring Diagram

    5. Wiring diagram 5.1 Split Indoor Unit 1Ø : 16 kW 5.2 Split Indoor Unit 3Ø : 16 kW LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 14 5.3 Split Outdoor Unit : 5 kW, 7 kW, 9 kW 5.4 Split Outdoor Unit 1Ø : 12 kW, 14 kW, 16 kW LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 15 5.5 Split Outdoor Unit 3Ø : 12 kW, 14 kW, 16 kW 5.6 Monobloc 1Ø : 5 kW, 7 kW, 9 kW LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 16 5.7 Monobloc 1Ø : 12 kW, 14 kW, 16 kW 5.8 Monobloc 3Ø : 12 kW, 14 kW, 16 kW LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 17: Exploded View And Part List

    Thermistor Assembly,NTC Gas side CN_PIPE_OUT - 32 - Copyright © 2017 - 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. - 33 - Copyright © 2017 - 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 18 Thermistor Assembly,NTC Condenser Temperature CN_TH6 - 35 - Copyright © 2017 - 2018 LG Electronics Inc. - 36 - All rights reserved. Only training and service purposes. Copyright © 2017 - 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 19: Exploded View

    263230H Thermistor Assembly,NTC Condenser Temperature CN_TH6 - 24 - Copyright © 2018 LG Electronics Inc. All rights reserved. - 37 - Copyright © 2017 - 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 20 Remote Controller Assembly Remote Controller Accessory - 26 - Copyright © 2018 LG Electronics Inc. All rights reserved. - 28 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. Only training and service purposes.
  • Page 21 Outdoor Dis- Overcharging, EEV charge super °C Below 5°C Outdoor Ref. malfunction(Full open) Above Ref.Shortage, EEV clogging, heat Discharge °C 110°C Pipe clogging Temp. Outdoor Dis- Overcharging, EEV charge super °C Below 5°C malfunction(Full open) heat LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 22 It is noted that this chapter only deal with 3rd party accessories. For accessories supported by LG Electronics, please refer to installation manual of each accessories. INSTALLATION Accessories supported by LG Electronics Accessories supported by 3...
  • Page 23 Temperature sensor is used to interlock with 2nd circuit operation and control temperature of main zone. (Model name : PRSTAT5K10) Insert the sensor to 'CN_MIX_OUT' (Brown) of the main PCB as shown below. CN_MIX_OUT Indoor PCB - For detailed installation instructions, refer to the following installation sense. LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 24 Aquastat V/V (Manual) 2Way V/V Regulation V/V Regulation V/V (Signal) Air vent (Signal) Floor Heating External Pump (Manual) External Pump 2Way V/V Air vent Radiator Convector Air vent Floor Heating Floor Heating External Pump (Manual) LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 25 Step 4. Connect the 3rd party controller to terminal block 2(11/12) completely. (including Meter interface module) PARTY CONTROOLER 11 : Black or METER CN_COM INTERFACE(LG) 12 : White PARTY CONTROLLER CN_COM Indoor PCB Indoor PCB Meter interface LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 26: Dry Contact

    Water Tank Fig. 2 CN_CC Dry contact Indoor PCB CAUTION CN_INDOOR Sensor mounting [Setting of Contact Signal Input] • For input contact closure only(No power input) Thermostat LG does not supply this section (Field supply) LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 27: Water Pump

    • Choose the place where the remote sensor isn't affected when door is open. NOTE • For more information about installing Remote Temperature Sensor, Please refer installation manual provided with Remote Temperature Sensor. • For system set-up, please read chapter 8.(Especially function code No.3) LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 28: External Pump

    Step 4. Connect the Wi-Fi modem to the USB cable fully. Step 5. Refer to the image below to install the Wi-Fi modem in the marked position. CN_WF Indoor PCB Indoor PCB TB_W_PUMP_C USB Cable External pump (No-voltage) LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 29: Adapter Cable

    Step 1. Check if the power of the unit is turned off. Step 2. Disassemble front panels and distinguish control box(Indoor) of the unit Step 3. Connect the external controller to PCB(CN_EXT) completely. Step 4. Connect the cable and field installation part. Adapter Cable LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 30: Ⅲ. Self-Diagnosis Function

    How to install External Controller (Setting up Programmable digital input operation) Follow below procedures step 1 ~ step 4. Step 1. Check if the power of the unit is turned off. Step 2. Disassemble front panels and distinguish control box(Indoor) of the unit Ⅲ.

  • Page 31: Error Code List

    Problem in electric backup Electric backup heater outlet temperature sensor S-Trouble heater outlet sensor of indoor unit is open or short. Error Damaged thermal fuse Fuse of electric heater is blown due to overheat. LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 32 CL_SOLAR CN_THMO1 CL_SOLAR - 19 - - 21 - Copyright © 2018 LG Electronics Inc. All rights reserved. Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. Only training and service purposes. LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 33: Error Code Check

    Suction pipe temperature sensor of outdoor unit H-Trouble - 72 - perature sensor is open or short. Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. - 23 - Copyright © 2018 LG Electronics Inc. All rights reserved. PCB Communication Error(Inverter It is failed to receive wired Inverter PCB signal in outdoor Only training and service purposes.
  • Page 34 Are the components of cycle such • Replace corresponding component as EEV running normally? A °C Error code 01, 08, 13, 17, 18, 19 Check the Flow Chart (B) 02, 06 Check Flow Chart (B) LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 35 CH 13 CH_TH4 Red / 4 CH 17 CN_TH3 Black / 6 Check the resistance Check the voltage CH 18 CN_TH3 Black / 6 CH 19 CN_HEATER Red / 2 Check the Volt. Check the Volt. LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 36 • Change the direction of EEPROM (check groove direction) Are there any visible defects on Indoor PCB? Reconnect the power of unit (Noise filter, Capacitor etc..) Replace the Indoor PCB EEPROM Replace the Indoor PCB Check groove direction CN_OPTION LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 37 • Remove air in pipe using air vent expansion tank and plate-type 1.5-2.0 bar? heat exchanger? • Replace the corresponding component When checking the • Clean up strainer strainer, is it being maintained clean? Replace water pump LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 38 1.5-2.0 bar? in pipe using air expansion tank, water pump and vent plate type heat exchanger? CN_W_PUMP_A When checking the • Replace corresponding strainer, is it being components maintained clean? • Clean-up the strainer LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 39 Check the water temperature difference between 15 and 30 minutes after starting the product. reinsertion connected correctly? Is power being supplied normally to the indoor unity PCB • Replace the Indoor PCB (220 V AC)? Reset the power of unit CN_FLOW1 LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 40 When measuring resistance, • Replace corresponding sensor pump lower than B °C? 90 °C in LG MV? in indoor unit? does it have the value, (Resistance “∞ Ω” means open) 5 kΩ ± 5 %? • Install the external Turn off the power of unit.
  • Page 41 (Resistance “∞ Ω” means open) • Replace thermo switch outlet greater than in the Table? 90 °C in LG MV? When measuring the voltage After checking that the temperature is • Re-insert and fix the harness after the sensor is connected to below 90 °C, reconnect the power.
  • Page 42 • Check the visual fault of heatsink and the Inverter PCB IPM condition of connection Is normal? W-YELLOW Replace Inverter PCB U-RED - 84 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. V-BLUE LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 43 U, V, W ‘ R S T - 85 - - 86 - Copyright © 2018 LG Electronics Inc. All rights reserved. Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. Only training and service purposes.

  • Page 44: Check Point

    ▶3Ø, 12kW / 14kW / 16kW INPUT_CURRENT <Inverter PCB> <CT Sensing Check Point > - 89 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. - 88 - LG Electronics _TROUBLE SHOOTING GUIDE Copyright © 2018 LG Electronics Inc. All rights reserved.
  • Page 45 PFC_IPM check U, V, W ‘ R S T <WVC connector check> - 95 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. - 94 - Copyright © 2018 LG Electronics Inc. All rights reserved.
  • Page 46 • Reset the power of unit supplied improperly? Is the DC-link voltage sensor abnormal? Replace Inverter PCB Black <CT Sensing Check Point> - 91 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 47 • Replace pressure switch/sensor gauge in the LG MV? Reset the power of unit - 92 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 48 • Re-insert and fix the harness after the sensor is connected to the (check color of the housing as shown in figure) PCB, does it match the values in the Table? Replace the indoor PCB CN_DISCHA (BLACK 3Pin Connector) CN_DISCHA LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 49 Check the resistance Check the voltage 93.8 Check Flow Chart (B) 96.2 45, 46, 114, 115 Is the sensor connected • Re-insert and fix the sensor using sensor correctly on pipe? holder (check fastening state) LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 50 (check color of the housing as shown in figure) PCB, does it match the values in the Table? CN_INV CN_MAIN_WH Replace the indoor PCB Inverter PCB Main PCB CN_H_PRESS LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 51 Reset the power of unit Replace the Outdoor PCB Are there any visible defects on Indoor PCB? Reconnect the power of unit (Noise filter, Capacitor etc..) Replace Inverter PCB LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 52 Br own B Black Green Br own Black Green ▶1Ø, 5kW / 7kW / 9kW - 105 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. LG Electronics _TROUBLE SHOOTING GUIDE - 104 -...
  • Page 53 D kPa AHUW166A3 ZHBW166A0 AHUW148A3 ZHBW148A0 AHUW146A3 ZHBW146A0 AHUW128A3 ZHBW128A0 AHUW126A3 ZHBW126A0 Cooling 4101 4199 Heating 4199 4199 - 106 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 54 <Check the PFCM> When checking the • Clean up HEX / strainer HEX / Strainer, is it being maintained clean? Check high pressure, Recharge refrigerant after piping vacuum work Model Z °C Split Monobloc PCB(Outdoor) LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 55 Replace the Outdoor PCB Wire of fan motor is connected properly? • Reconnect properly as shown in figure. (check the color of housing) THERMISTOR CN_HEATSINK Replace the Inverter PCB or Motor PCB THERMISTOR_S HEATSINK CN_BLDC_FAN2_BL CN_BLDC_FAN1_WH LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 56 ▶3Ø, 12kW / 14kW / 16kW 0.54 0.397 1.07 0.406 0.46 0.345 0.92 0.353 0.79 0.307 0.34 0.262 0.68 0.268 - 105 - - 110 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 57 0.724 ± 7% Ω ( at 25℃ ) (at 25 °C) 1.040 ±7% Ω 1.125±7% Ω 0.628 ±7% Ω 0.529 ±7 % Ω 0.628 ± 7% Ω 0.724 ± 7% Ω - 105 - - 106 - LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 58: Ⅳ. Function Control

    IV. Function Control 1. Function List 2. Function Control Setting _TROUBLE SHOOTING GUIDE...
  • Page 59 1. * : These functions need to connect the wired remote controller. arately by the corresponding model name, supplied with separate O : Applied, X : Not applied package. - 16 - - 17 - LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 60: List Of Function

    PHLLA / PHLLB Backup heater kit AHEH066A / AHEH036A - 24 - Copyright © 2018 LG Electronics Inc. All rights reserved. Note Only training and service purposes. 1. O: Possible, X: Impossible, - : Not applicable 2. * : Some advanced functions controlled by individual controller cannot be operated.

  • Page 61: Dip Switch Setting

    1Ø model : Half capacity is used 3Ø model : 1/3 capacity is used Selecting electric heater capacity Unused Full capacity is used Thermostat is NOT installed Thermostat installation information OFF is selected ON is selected Thermostat is installed LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 62 * Input current value can be limited by DIP Switch operation. Max Mode Peak Control Mode Capacity Mode Reserved Not Use Running Current(A) Running Current(A) Cooling 1Ø 5,7,9kW Heating Cooling 1Ø 12,14,16kW Heating Cooling 3Ø 12,14,16kW Heating LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 63: Emergency Operation

    Depending on the status of slight / heavy / critical trouble, pop-up phrase is guided separately on display. - Slight trouble : Heating/Cooling Operable - Heavy trouble : Heating Operable only - Critical trouble : Service center request AWHP operates when user pressed OK button on pop-up window. LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 64: How To Enter Service Setting

    • In the setting list, select the service setting category, and press [OK] button to move to the service setting list. Service setting • You can set the product service functions. • Some functions may not be displayed/operated in some product types. LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 65: Model Information

    - 1kWh = 1kBtu * 0.29307 kWh is the result calculated based on Btu, There may be a small difference between calculated and actual capacity. Ex) If the unit capacity is 18kBtu, it is displayed as 5kWh. LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 66: Open Source License

    LG warrenty. • In the menu screen, press [<,>(left/right)] button to select the setting category, and press [∧(up)] button for 3 seconds to enter the password input screen for the installer setting.
  • Page 67 It is the function to initialize (0000) the password when you forgot the Password Initialization setting TH on/off Variable, heating password set in the remote controller. Heating Water Outlet Temperature TH On / Off Type Water setting LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 68 • In the installer setting list, select 3 Minutes Delay category, and press [OK] button to move to the to the detail screen. detail screen. Value Water Air+Water NOTE Air temperature as setting temperature is ONLY available when Remote Air Sensor Connection is enabled and Remote Air Sensor Connection is set as 02. LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 69: Dry Contact Mode

    Added system functionality by using external inputs (dry contacts and wet contacts). NOTE Enter address code as hexadecimal value Front: Central Control Gr. No. Back side: Central control indoor the number NOTE This function is not available for monobloc LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 70: Pump Test Run

    * Upper / lower limit / default value is in ˚C NOTE Only available when remote air temperature sensor is connected. • Accessory PQRSTA0 should be installed. • Also, Remote air sensor connection should be set properly. LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 71: Water Cooling Set Temp

    Water condensation on the radiator • While cooling operation, cold water may not flow to the radiator. If cold water enters to the radiator, dew generation on the surface of the radiator can be occurred. LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 72: Water Heating Set Temp

    * Upper / lower limit / default value is in ˚C NOTE • When the E/heater is not used, the minimum temperature of the water temperature can be set from 34 ˚C to 20 ˚C LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 73: Screed Drying

    ※ If the upper limit setting value of the heating LW temperature is 55 ˚C or lower, it is set to 55 ˚C forcibly. If the lower limit setting value of the heating LW temperature is 25 ˚C or higher, it is set to 25 ˚C forcibly. LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 74 -1 °C and current leaving water temperature or room air temperature is much belower than target leaving water temperature or target room air temperature. Default Range Split 18~-15 Mono 18~-25 * Upper / lower limit / default value is in ˚C LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 75: Water Supply Off Temp. During Cooling

    • If FCU is set as ‘Not use’ but FCU or 2way valve is NOT installed, the unit can do abnormal operation. Function Value Default Setting Rang Water supply off temperature 25~16 cooling water temperature FCU Use/ not use Use / Not Use LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 76: Tank Setting

    Max outdoor temp 55~40 Min temp 30~1 NOTE DHW heating should be enable • If Disinfection active is set as ’ Not use’, that is ‘disable disinfection mode’, Start date and Start time is not used. LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 77 Session A : Heating by AWHP compressor cycle and water heater Session B : Heating by water heater Session C : No heating (Water heater is Off) Session D : Heating by water heater NOTE DHW heating does not operate when it is disabled. LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 78: Heater Priority

    Description Value TH On TH Off Type0 -0.5 °C 1.5 °C Type1 -1 °C 2 °C Type2 -2 °C 3 °C Type3 -3 °C 4 °C Value Boost heater only ON Main+Boost heater ON LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 79: Th On/Off Variable, Heating Water

    Type0 -2 °C 2 °C Type1 1 ˚C -1 ˚C Type1 -3 °C 3 °C Type2 2 ˚C -2 ˚C Type2 -4 °C 4 °C Type3 3 ˚C -3 ˚C Type3 -1 °C 1 °C LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 80 • Change setting values using [<,>(left/right)] button Description Value Value TH On TH Off Outlet (Default) Inlet Type0 0.5 ˚C -0.5 ˚C Type1 1 ˚C -1 ˚C Type2 2 ˚C -2 ˚C Type3 3 ˚C -3 ˚C LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 81 • In the installer setting list, select Pump setting in heating category, and press [OK] button to move to the detail screen. • Change setting values using [<,>(left/right)] button Value Outlet (Default) Inlet Type Time setting Operation continue 1 min ~ 60 min 1 min ~ 60 min LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 82: Pump Setting. In Cooling

    Type Time setting Operation continue 1 min ~ 60 min Type Not use 1 min ~ 60 min Oper. Cycle 20 min ~ 180 min Oper. Time 1 min ~ 10 min LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 83: Pump Capacity

    Do not use (install) Dry Contact D/C Installed Use (install) Dry Contact NOTE CN_CC is the device connected to the unit to recognize and control the external contact point. Value Description 10~100 : % 100 (Default) Change unit: 5 LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 84: Smart Grid(Sg)

    * If heating mode is selected, heating & cooling or cooling can not be selected. - Depending on the air / outflow control selection value, the water / air related setting value is displayed on the screen. LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 85: Modbus Address

    Set point 3 Set point 4 Outdoor air temperature Set point 5 Set point 6 Set point 7 Set point 8 NOTE To use this function, switch No.1 of option switch 1 must be turned ON. LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 86 NOTE To use this function, the antifreeze short pin must be open and switch No.2 in Option SW 3 must be on. Value Not use Simple Operation Simple Dry Contact Single emergency stop LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 87: Use External Pump

    - Add Zone (2nd Circuit function setting) : Use / Not Use - Value Closing Time : 60 ~ 999 sec (Default: 240) - Hysteresis (Thermal On / Off ) : 1 ~ 5 °C (Default: 2) LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 88: Rd Party Boiler

    External boiler OFF condition : - If External air temperature ≥ external boiler operation temperature value (installer setting) + Hysteresis (installer setting), turn off external boiler operation and operate indoor unit LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 89: Data Logging

    Hot water operation / stop, Hot water set temperature, Hot water temperature, Outdoor unit On / Off, Error code Number of Display: Within 50 - Save criteria ν ν Error occurred, released ON / OFF of outdoor unit operation LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 90: Password Initialization

    Step 0 (DHW +5˚C) Step 1 (H/P+2˚C, DHW +5˚C) Step 2 (H/P+5˚C, DHW +7˚C) 1:1[Switch-on command] The command activates the compressor. Optionally, electrical booster heaters can be activated to utilize electricity surpluses LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 91: Checking Method For Key Components

    V. Checking Method for Key Components 1. Flow Switch 2. Water Pump 3. Electric Heater 4. Remote Controller 5. Compressor 6. Fan Motor...

  • Page 92: Flow Switch

    • Check the air vent. If there is air in the unit, it can display “CH14”. Please remove the air by using the air vent. - 63 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. - 64 - Copyright ©...

  • Page 93: Electric Heater

    If the reason of malfunction is clearly proved as the defect of the electric heater itself, then replace it with new one. - 65 - - 66 - Copyright © 2018 LG Electronics Inc. All rights reserved. Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. Only training and service purposes.

  • Page 94: Compressor

    (For analog and digital mode). - 67 - - 68 - Copyright © 2018 LG Electronics Inc. All rights reserved. Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. Only training and service purposes.

  • Page 95: Replacement

    VI. Replacement 1. Replacement procedure for Compressor 2. Caution for Assembling Outdoor Panels after Test Run 3. Replacement Procedure for INV PCB...
  • Page 96 10. After completion of vacuum, open the service valves. If recovery unit is used, charge refrig- When inserting the sound proof, be sure to insert counter-clockwise. erant. < Figure 2 > Discharge pipe Suction pipe < Figure 1 > LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 97: Replacement Procedure For Inv Pcb

    Confirm that there is no gap between PCB case and control case. If any gap is present, it will cause product malfunction. - 59 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. 193P...

  • Page 98: Test Run Check

    VII. Test Run Check 1. Checking List of Initial Installation 2. Checklist 3. Test run flow chart...
  • Page 99 • Refrigerant leakage degrades the performance. Installation • Only qualified person can proceed wiring. Refrigerant leakage If leakage found, contact qualified LG air condi- Field wiring • Wiring and local-supplied electric parts should be tioning installation person. complied with European and regional regulations.
  • Page 100 Split and fixed according to the installation manual? Is the outdoor unit installed and fixed firmly? Installation Common Removal of wooden pallet and fixing with anchor Is the outdoor unit installed at an appropriate location? Installation Common (Consider air flow, noise and being under the eaves and etc.) Is it possible to secure appropriate service area for the Installation Common indoor unit? (More than 600mm to the front and 400mm to sides) Is there a proper protective measure or earthing Electric Common against lightning? Is capacity of power lines and circuit breaker selected based on the atest catalogue of LG Electronics and is pull-in power for both indoor and outdoor units normal? Electric Common (Power/control cables, earth leakage breaker) 3-phase 4-wire AC 380 V for general purpose / 3-phase 3-wire AC 380V for factories Check pull-in power for the indoor unit (1-phase 2-wire AC 220 V) water pipe Common Is it proper to design the pipe diameter? water pipe Common Is the quality of heat source water acceptable? LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 101 Ⓓ High pressure cover Out - Water Charge hose (PT 25) Ⓔ Liquid pipe Ⓕ Gas pipe Liquid- Refrigerant (9.52mm) Ⓖ Service port Nitrogen gas Gas - Refrigerant cylinder (15.88 mm) (in vertical standing position) Therma V - Mono Be sure to use a manifold valve for leakage test. If it is not available, use a stop valve for this purpose. The "Hi" knob of the manifold valve must always be kept close. • P ressurize the system to no more than 3.0 Mpa with dry nitrogen gas and close the cylinder valve when the gauge reading reaches 3.0 Mpa Next, test for leaks with liquid soap. After the system is found to be free of leaks, relieve the nitrogen pressure by loosening the charge hose connector at the nitrogen cylinder. When the system pressure is reduced to normal, disconnect Out - Water (PT 25) the hose from the cylinder In - Water (PT 25) LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 102: Finishing The Job

    R410A of liquid side valve counter-clockwise to fully open Outdoor unit the valve. 2. T urn the valve stem of gas side valve counter- Open gas/liquid piping clockwise to fully open the valve. Open cap and turn counter clock wise 3. L oosen the charge hose connected to the gas side Outdoor Unit service port slightly to release the pressure, then remove the hose. 4. R eplace the flare nut and its bonnet on the gas side service port and fasten the flare nut securely with an adjustable wrench. This process is very important to prevent leakage from the system. Pressure Manifold 5. R eplace the valve caps at both gas and liquid side gauge valve service valves and fasten them tight. This com- pletes air purging with a vacuum pump. Open Open The air conditioner is now ready to test run. Vacuum pump LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 103 9.52 (3/8") (5/8") remote control cable ing the front cover, grab the left and right 12 kW sides of the front cover. Then pull into 14 kW upward direction. 16 kW A trap is not necessary when the outdoor unit is installed in a higher position than the indoor unit. Indoor unit Outdoor unit Step 3. A ttach "Installation Sheet" to the wall Step 5. H ang the indoor unit at the supporting Outdoor unit and mark the location of bolts. This plate sheet helps to find correct location to Indoor unit the bolts. Step 4. D etach the Installation sheet. Screw bolts at the hole marks on the wall. When screwing bolts, use M8 ~ M11 anchor bolts to secure hanging the indoor unit. LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 104 Ensure that the spaces indicated by arrows around bottom, side, and top side. Check the strength and level of the installation ground so that the unit will not cause any vibration or noise after installation. • Wider spaces are preferred for easy maintenance and piping. • F ix the unit securely by means of the foundation bolts. (Prepare 4sets of M12 foundation bolts, • I f minimum service space is not secured, air circulation can be a problem and internal parts of the nuts and washers each which are available on the market.) indoor unit can be damaged by overheating. • It is best to screw in the foundation bolts until their length are 20mm from the foundation surface. Be sure to remove the Pallet (Wood Support) of the bottom side of the unit Base Pan before fixing the bolt. It may cause the unstable state of the unit settlement, and may cause freezing of the heat ex- changer resulting in abnormal operations. • B e sure to remove the Pallet (Wood Support) of the bottom side of the unit before welding. Not removing Pallet (Wood Support) causes hazard of fire during welding. Minimum service space (unit : mm) Pallet (Wood Support) - Remove before Installation Anti-vibration Spring washer materials Concrete Frame base Four bolt are required 3thread H-Beam ridges Minimum service space (unit : mm) LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 105 Installation of outdoor unit Applicants Common Applicants Common When connecting earth cable, the diameter of cable should be bigger than 1.6mm to If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure that heat secure safety. radiation from the condenser is not restricted. The earth cable is connected to the terminal block where earth symbol is marked. • Ensure that the spaces indicated by arrows around front, back and side of the unit. Be sure to correct the outdoor unit to earth. Do not connect earth line to any gas • Do not place animals and plants in the path of the warm air. pipe, liquid pipe, lightening rod or telephone earth line. If earth is incomplete, it may • T ake the air conditioner weight into account and select a place where noise and vibration are cause an electric shock. minimum. • Select a place so that the warm air and noise from the air conditioner do not disturb neighbors. In order to ensure compliance with regulations on electrical equipment and cabling, follow the gov- • P lace that can sufficiently endure the weight and vibration of the outdoor unit and where even ernment regulations and instructions of power company. installation is possible • Place that has no direct influence of snow or rain • Place with no danger of snowfall or icicle drop • P lace without weak floor or base such as decrepit part of the building or with a lot of snow ac- cumulation LG Electronics _TROUBLE SHOOTING GUIDE...

  • Page 106: Cost-Effective

    3 4 5 6 8 10 30 4050 60 70 80100 400 600 800 1,000 4 5 6 8 30 40 50 60 70 80100 400 600 800 1,000 ② Pressure drop Pressure drop (mmAq/m) ② Velocity ③ P ipe Water ① flow LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 107 Items to check Was flushing done? Result Purpose Secure flow and see if system is stabilized Purpose Remove foreign objects and secure flow Applicants Common Applicants Common Install the buffer tank with the following goals (Field scope). There may be some foreign objects after new piping installation or equipment replacement. 1. For floor heating and if flow resistance is too high Thus, connect the indoor unit only after clearing pipings so that there may be no foreign object in the piping. 2. For defrosting, oil retrieval operation and continuous heating 3. Preventing short cycle from load variation Flushing can be done with the service valve and a separate pump and tap water. Secondary pump needs to be installed if the buffer tank is to be installed (Field scope) Generally a third party controller is installed to control the pump at the load side. CN_Waterpump (A) Indoor Unit Buffer tank Under floor coil water pipe Refrigerant pipe Circulation pump Outdoor Unit Buffer tank Strainer Fine Strainer No Flushing Done Outdoor Unit LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 108 Treatment may be Needed Conductivity 10 ~ 500 uS/cm Moderate Corrosion Treatment may be Needed TDS (Total dissolved solids) 8 ~ 400 ppm - 0.5 Mild Corrosion Probably No treament Alaklinity (HCO 60 ~ 300 (mg/L) None-Mild Corrosion No Treatment 4 ~ 8.5 °dH Near Balanced Probably No treament Total hardness 71.4 ~ 151.7 (mg/L) Some Faint Coating Treatment may be Needed Iron (Fe) ≤ 0.2 (mg/L) Mild Scale Coating Treatment may be Needed Sulphate (SO ≤ 100 (mg/L) Moderate Scale Forming Treatment Recommended Nitrite (NO ≤ 100 (mg/L) Severe Scale Forming Treatment Recommended Free chlorine (Cl ≤ 1 (mg/L) LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 109 Adjust amount of antifreeze solution based on the site's conditions. tem such as air remaining in the piping, dissolved air, and air that flowed in during installation. Check concentration of antifreeze solution and add more solution if concentration is too weak to maintain proper level of concentration. • The air vent valve should be installed at every high point of the system. Our own antifreeze logic is active by default but the protective logic may not work if the product • At the beginning and end of the curve fails, thus other physical measures need to be considered. • At the water inlet/outlet pipe of the heat pump and heat exchanger • At each branch piping connected to the main piping, when connecting multiple heat pumps Antifreezing mixing ratio (by volume) Dissolved Freezing point 0 °C -5 °C -10 °C -15 °C -20 °C -25 °C Ethylene glycol 12.8 33.5 propylene glycol 15.5 Ethanol 24.8 37.3 42.2 Indoor Unit Indoor Unit Air trap area water pipe is buried underground or exposed Underfloor LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 110 Items to check Was magnetic type strainer installed? Result Purpose Secure flow, protect system Purpose Secure flow, protect system Applicants Common Applicants Common Check water pipe pressure when supplying tap water after first installation work. Especially to remove metallic particles from foul heating piping, it is recommended to use a mag- netic or cyclone filter, which can remove small particles. Small particles may damage the unit and Check pressure on the gauge either on the product or the gauge installed on site inside the piping. will NOT be removed by the standard filter of the heat pump system. Default pressure is 1bar and maximum is 3bar. (Release water with relief valve inside the product if pressure is higher than 3bar) Magnetic strainer is separately available. Supply tap water until pressure is stabilized and maintained, and start supplying tap water when Install strainer on the water supply/inlet side for indoor unit. pressure reaches minimum of 0.3bar. Observe instructions of manufacturer of magnetic strainer. Pressure gauge: Field scope (option) Underfloor Supply tap water Magnetic strainer Inlet Outlet Filter Magnet Pressure gauge inside product Pressure gauge inside piping Magnetic filter LG Electronics _TROUBLE SHOOTING GUIDE...
  • Page 111 Is hot water discharged ? Normal Normal - 54 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes. - 54 - Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 112 MEMO _TROUBLE SHOOTING GUIDE...

  • Page 113: Troubleshooting Guide

    Visual Elements Logo Trouble shooting guide LG Electronics Home Appliance & Air Solution Company, Air Solution Division Publisher Issued date January 2019 Adress LG Electronics Gasan A B/D, 56, Digital-ro 10-gil, Geumcheon-gu, Seoul, Korea http://partner.lge.com Life’s Good All rights are reserved by LG Electronics.

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