LG Therma V ZHNW16B0 Service Manual
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LG Therma V ZHNW16B0 Service Manual

LG Therma V ZHNW16B0 Service Manual

Air-to-water heat pump
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CONFIDENTIAL
AIR-TO-WATER HEAT PUMP
SERVICE MANUAL
(General)
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

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Summary of Contents for LG Therma V ZHNW16B0

  • Page 1 CONFIDENTIAL AIR-TO-WATER HEAT PUMP SERVICE MANUAL (General) CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel. Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 2: Table Of Contents

    Part 5 : Trouble Shooting 1. Checking Key Components of Indoor Unit 2. Checking Key Components of Outdoor Unit 3. Self-Diagnosis Feature 4. Trouble Shooting Guide - 2 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 3: Safety Precaution

    Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks. - 3 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 4 • When flared joints are reused indoors, the flare part shall be re-fabricated. • When mechanical connectors are reused indoors, sealing parts shall be renewed. - 4 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 5: Work Procedure

    Have a dry powder or CO2 fire extinguisher adjacent to the charging area. • Pipe-work shall be protected from physical damage. - 5 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 6 This shall be reported to the owner of the equipment so all parties are advised. - 6 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 7: Cabling Check

    Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. A halide torch (or any other detector using a naked flame) shall not be used. - 7 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 8 Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is ventilation available. - 8 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 9: Charging Procedures

    The label shall be dated and signed. Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant. - 9 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 10 A vacuum valve shall be provided to evacuate the interconnecting pipe and/or any uncharged refrigerating system part. - 10 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 11 The noe hose-sets supplied with the appliance are to be used and that old hose- sets should not be reused. - 11 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 12 Check the drainage of the indoor unit after the repair. If drainage is faulty the water to enter the room and wet floor. - 12 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 13 2.1 Indoor Unit .............12 2.2 Outdoor Unit ............13 3. Combination of Outdoor Units ........14 4. Nomenclature..............15 4.1 Indoor Unit .............15 4.2 Outdoor Unit ............15 - 13 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 14: Model Information

    - Additional Information : Serial number is refer to the barcode on the product. - Max allowable pressure High side / Low side : 4.32 MPa / 2.4 MPa - Refrigerant : R32 - 14 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 15: Indoor Unit

    *2 : tested under EN 14511 Cooling condition (water out temperature 18°C at outdoor ambient temperature 35°C / 24°C) ※All appliances were tested at atmospheric pressure (1atm). - 15 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 16: Specification

    6. Sound Performances are based on the following conditions. • Sound Power Level : Measured according to EN14825. • Sound Pressure Level : Calculated value according to distance of sound power. - 16 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 17 1,140 × 1,462 × 461 1,140 × 1,462 × 461 1,140 × 1,462 × 461 91.7 91.7 91.7 Weight Shipping 104.7 104.7 104.7 - 17 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 18 6. Sound Performances are based on the following conditions. • Sound Power Level : Measured according to EN14825. • Sound Pressure Level : Calculated value according to distance of sound power. - 18 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 19 1,140 × 1,462 × 461 1,140 × 1,462 × 461 1,140 × 1,462 × 461 91.7 91.7 91.7 Weight Shipping 104.7 104.7 104.7 - 19 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 20 6. Sound Performances are based on the following conditions. • Sound Power Level : Measured according to EN14825. • Sound Pressure Level : Calculated value according to distance of sound power. - 20 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 21: External Appearance

    Sheet OUTDOOR UNIT BOX Item Image Quantity Outdoor Unit U3 Chassis Drain Cap Drain Nippl Installation Manual Owner's / Installation manual Strainer Damper - 21 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 22: Part 2 Features & Controls

    Part 2 Features & Controls - 22 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 23 Peak Control Convenience Mode Lock Low noise operation Forced Cooling Operation (Outdoor Unit) Base Pan Heater Network function Network solution(LGAP) O (Accessory) O (Accessory) - 23 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 24 3. ** : ACP, AC Smart, ACP BACnet or ACP Lonworks is needed. 4. If you need more detail, please refer to the manual of product. (http://partner.lge.com/global : Home> Doc.Library> Product > Control(BECON))) - 24 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 25: Feature & Controls

    When you change the menu’s setting value OK button When you save the menu’s setting value On/Off button When you turn ON/OFF the AWHP - 25 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 26: Special Function

    In the lock setting list, if you press [∧,∨(up/down)] button, you can turn on/off the corresponding lock func- tion. - 26 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 27: Timer Entrance And Setting Method

    • After setting the value, when you press [OK] button, the timer is activated. • After setting the value, if you press [Back] button, the changed value will not be applied. - 27 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 28: Simple Timer

    If the product operation is Off, the easy timer turns on the operation after the corresponding time. If the easy timer operation is turned On/Off before the timer operation, the set timer will be cleared. - 28 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 29: Turn-On Reservation

    Even if the Turn-on Reseravation operation is turned On/Off after the setting and before the timer operation, the set timer is not cleared. - 29 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 30: Turn-Off Reservation

    Even if the Turn-off Reservation operation is turned On/Off after the setting and before the timer operation, the set timer is not cleared. - 30 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 31: Schedule Setting

    - If ‘Stop’ is selected, you cannot set the mode / temperature / fan speed. When stages 1~4 are completed, along with the message of ‘schedule is added’, it moves to View and edit schedule screen. - 31 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 32 • If necessary, enable or disable of screed drying can be programmed according to user’s setting. • While the screed drying mode is operating, “Dry” is displayed. - 32 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 33: System Setup

    Turn off electric power supply before setting DIP switch • Whenever adjusting DIP switch, turn off electric power supply to avoid electric shock. General Information OFF is selected ON is selected - 33 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 34: Dip Switch Information

    Selecting electric heater capacity Electric heater is not used Electric heater is not used Thermostat is NOT installed Thermostat installation information Thermostat is installed - 34 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 35 Description Setting Setting Default Default As Master MODBUS As Slave REGINE MODBUS Function Unified Open Protocol Antifreeze mode not use ANTIFREEZE Antifreeze mode - 35 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 36 Peak Control Mode Max Mode Running Current(A) Capacity Mode Running Current(A) Step 1 Step 2 Cooling 1Ø 12,14,16 kW Heating Cooling 3Ø 12,14,16 kW Heating - 36 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 37 - Heavy trouble : Heating Operable only - Critical trouble : Service center request AWHP operates when user pressed OK button on pop-up window. - 37 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 38: Service Setting

    Indoor / outdoor product group and capacity information RMC Version Information Check the remote controller model name and software version. Open Source License View the remote controller’s open source license. - 38 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 39: Service Contact

    • While “edit” button is selected, press [OK] button to move to the edit screen, change it, and press [OK] button to change the service contact point. - 39 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 40: Model Information

    Btu, There may be a small difference between calculated and actual capacity. Ex) If the indoor unit capacity is 18kBtu, it is displayed as 5kWh. - 40 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 41: Rmc Version Lnformation

    View the remote controller software version. • In the service setting list, select the RMC version information and press [OK] button to move to the detail screen - 41 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 42: Open Source License

    Example) SW version : 1.00.1 a In the above case, the password is 1001. h Remote controler should be hanged botton of control box in service - 42 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 43 Input the password and press [OK] button to move to the installer setting list. - 43 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 44: Installer Setting

    Function to use 2 remote control environment Function to save the environment settings of the product for use LG Therma V Configuration in LG Therma V Configurator through SD Card. Water pump off After 20 consecutive hours, disable / enable the Forced operation...
  • Page 45 Display Indoor Unit's operation time Information Current Flow Rate Function to check the current flow rate. Data logging Display error history of connected unit - 45 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 46: Common Setting

    Remote air sensor connection is set as 02. • Dry Contact Mode This function allows the dry contact operate under auto run mode or manual mode with remote controller. - 46 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 47: Temperature Range Setting

    • DIP switch No. 2 and 3 should be set properly. • Screed drying mode After installing water pipes for under floor heating, user can select screed drying mode for curing the cement. - 47 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 48 • If DHW heating is disable, the disinfection mode will not be operated although Disinfection active is set as ‘Use’. • To use disinfection mode, DHW heating should be enable. (by button input or scheduler programming) - 48 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 49 Session C : No heating (Water heater is Off) Session D : Heating by water heater DHW heating does not operate when it is disabled. - 49 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 50: Temperature Control Parameter Setting And Etc

    It is a function to adjust the cooling water temperature Thermal On / Off temperature according to the field envi- ronment in preparation for cooling or cooling claim. - 50 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 51 When you press “initialization” button, a popup screen appears, and when you press “check” button, password ini- tialization starts, and the user password is changed to 0000. - 51 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 52 Time ❈ 1=active / 0=not active ❈ A = Active time ❈ S = Stop time ❈ B = Boost heater delay time - 52 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 53 It is a function to set operation reference value in Solar Thermal System. • Current flow rate It is a function to check the current flow rate. - 53 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 54: Test Run

    (comp.,Fan, others ) discharged water? * Refer to Troubleshooting Guide Operation mode change to Heating mode Is hot water discharged ? Normal - 54 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 55: Part 3 Basic Control

    Part 3 Basic Control - 55 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 56: Normal Operation

    Tevaporator : evaporation temperature (℃) ＊Heating mode the target temperature of discharge pipe = T condenser + α T condenser : condenser temperature (℃) - 56 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 57: Part 4 Replacement

    Part 4 Replacement - 57 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 58: Replacement Procedure For Compressor

    If recovery unit is used, charge refrigerant. When inserting the sound proof, be sure to insert counter-clockwise. < Figure 2 > Discharge pipe VI Pipe Suction pipe - 58 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 59: Replacement Procedure For

    Be sure that PCB assembly is firmly assembled with control case. Confirm that there is no gap between PCB case and control case. If any gap is present, it will cause product malfunction. - 59 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 60: Caution For Assembling Outdoor Panels After Test Run

    If screws are not assembled, it allows rain come into control box causing defect of unit. - 60 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 61: Part 5 : Trouble Shooting

    Part 5 Trouble Shooting - 61 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 62 1.6 Fan Motor ....................66 2. Self-Diagnosis Feature..............67 2.1 Concept of ‘Classified Trouble’ ...............67 2.2 Error Indicator...................68 2.3 Error Code List..................69 3. Trouble shooting Guide ................71 - 62 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 63: Checking Key Components Of Indoor Unit

    • 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 © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 64: Water Pump

    220-240 V~ while ‘Water Pump Operating’ is displayed at control panel, the unit PCB is in trouble. In this case, contact official After Service Center and replace the unit PCB. • To correct wrong wiring, please refer Ⓐ. - 64 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 65: 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 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 66: Remote Controller

    Unless 2nd and 3rd pin of DIP switch setting is 01(OFF-ON) or 10(ON-OFF), the water tank heating will not be configured. - 66 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 67: Compressor

    ) if using commercial frequency tester when measuring output values of the inverter (when measuring absolute values). Accurate measuring values cannot be obtained with a general portaable tester (For analog and digital mode). - 67 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 68: Fan Motor

    If starting is done, it means that the main board has defect. 3. If problems continue to occur even after countermeasure of No.1 and No.2, it means that both boards has defect. - 68 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 69: Self-Diagnosis Feature

    - But in emergency operation, automatic re-start is prohibited to protect the product. - Therefore, user must restart the product after power reset when emergency operation has been running. - 69 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 70: Error Indicator

    If abnormal voltage is supplied, the protection circuits will turn off the product in order to prevent the component damage. The product will automatically restart after 3 minutes. - 70 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 71: Error Code List

    Before conducting a checking or repairing job, pull out the plug out of the outlet and make sure that the lamp on the control board outdoor unit is off. - 71 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 72 Vapor injection inlet pipe temperature sensor of outdoor unit is open or short. 115** Injection Out TH Error (Open/Short) Vapor injection outlet pipe temperature sensor of outdoor unit is open or short. - 72 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 73: Trouble Shooting Guide

    • Replace the sensor damaged? Is the resistance or voltage of • Replace the sensor sensor connector normal? Replace the Main PCB(Indoor) - 73 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 74 * The sensor resistance value and the voltage value at both ends may vary depending on the ambient temperature, and the value has a deviation of ± 5 %. * There may be some errors depending on the measurement equipment. - 74 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 75 50 ℃ 1.7 k Ω 55 ℃ 1.4 k 0.9 V Ω 60 ℃ 1.2 k 0.8 V Ω 65 ℃ 0.7 V Ω - 75 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 76 Is the DC12V supply voltage of the wired remote controller Inspect Main PCB and replace measured normally? Inspect Wired remote controller and replace - 76 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 77 • Replace the sensor damaged? Is the voltage of the sensor • Replace the sensor connector normal? Replace the Main PCB(Indoor) - 77 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 78 * The sensor voltage value at Pin 2 & Pin3 may vary depending on the reference voltage input, and the value has a deviation of ±2%. * There may be some errors depending on the measurement equipment. - 78 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 79 1.70  40.0  1.90  CN_F_SENSOR (Blue / 4) 45.0  2.10  50.0  2.30  55.0  2.50  60.0  2.70  65.0  2.90  70.0  3.10  75.0  3.30  80.0  3.50  - 79 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 80 3. Disconnect the "CN-REMO" connector of the wired remote control. 4. Set the range of the tester to Ω. 5. Please check as below. - 80 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 81: Check Point

    4. Check the installation status of the wired remote control. If there is influence of ambient noise, it is separated from the electromagnetic wave generating equipment. - 81 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 82 (Noise filter, Capacitor -CH53: Check the Main PCB(Indoor) and then etc..) check the Main PCB(Outdoor Cycle) Have the PCB communication and power supply been damaged? - 82 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 83 ▶12 / 14 / 16 kW: Check the connection state of the PCB connection harness CN_COM CN_COM CN_COM SINGLE SINGLE SINGLE POW ER Main PCB(Outdoor Cycle) Main PCB(Indoor) - 83 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 84 2. If the EEPROM value & the Program value are not matched, the Code is Displayed 3. After Checking the connection and Insertion, replace the PCB or Option PCB EEPROM - 84 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 85 Signal Output Check PCB Pump Signal Check PCB Output Voltage Check and Change the flow Check the voltage of the flow sensor sensor connector - 85 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 86 Close the inlet / outlet connection valves. Separate the bottom of strainer with a spanner. Clean the strainer with running water. After assembling the strainer, open the valves. - 86 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 87 ② If there is cable interference around the flow sensor → Arrange the cable so that it does not interfere. * Cable interference can cause false switch state detection. - 87 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 88 ② If the input voltage is abnormal, check the breaker and power line. CN_POWER Check with the AC voltage measurement mode.(~V) circuit tester - 88 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 89 ① If the AC 220 V is measured but the pump does not work, replace the pump. ② If there is no 220V output on the connector, replace the PCB. - 89 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 90 * There may be some errors depending on the measurement equipment. ※ If there is no problem in the flow sensor, check the indoor unit PCB and replace the PCB. - 90 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 91 Temp. sensor Piping temp. sensor kΩ kΩ kΩ Measure Indoor unit outlet Inlet pipe piping temperature sensor Temp. sensor resistance - 91 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 92 PCB matches the value in the table? Replace the Main PCB(Indoor) Voltage (at 25 ℃) Water Out 2.232 Water In 2.232 CN_TH3 - 92 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 93 2.1 kΩ 50 ℃ 1.7 kΩ 55 ℃ 1.4 kΩ 0.9 V 0.8 V 60 ℃ 1.2 kΩ 65 ℃ 1 kΩ 0.7 V - 93 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 94 - 3Ø Model : After checking that the temperature is below 70 °C, reconnect the power. (automatic reset) - 94 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 95 Before checking PCB(Inverter) or each outdoor electric parts, wait for 3 minutes after the power is off. When measuring at standby state of power supply, after checking the measurement mode of the meter, be careful of the short-circuits with other parts. - 95 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 96 ≥ 10 MΩ 4. Turn on Power 5. Remote Controller Off (Stop mode) 6. Connect LGMV 7. Wait 30seconds. 8. Check compressor and fan off - 96 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 97 9. Perform diagnostic function PC LGMV Mobile LGMV - 97 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 98 · Connector reconnection: replacement when defective in good condition? Is IGBTM normal? · Inv PCB(Outdoor) replacement Recheck power and installation condition - 98 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 99 Nw Nv Nu 23 22 21 23 22 21 0.4 ~ 0.6 V 0.4 ~ 0.6 V PFC_IPM check U, V, W R S T - 99 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 100 Nw Nv Nu 23 22 21 23 22 21 0.4 ~ 0.6 V 0.4 ~ 0.6 V PFC_IPM check U, V, W R S T - 100 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 101 - 3Ø: Check if the R-S / R-T / S-T input voltage is within AC 400 ± 15 % Is the Inv PCB(Outdoor) normal? · Inv PCB(Outdoor) IPM check - 101 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 102 Check DC voltage when power is applied Normal 5 V : 5 V ± 10% V INPUT_CURRENT <Inverter PCB> <CT Sensing Check Point > - 102 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 103 * Action: Replace Inv PCB (Outdoor) Is the DC link voltage detector DClink voltage detection part parts normal? burnout, work defect check * Action: Replace Inv PCB (Outdoor) - 103 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 104 R-N, S-N, T-N: 230 ± 15 % V R-S, R-T, T-S: 400 ± 15 % V 1(R) 2(S) 3(T) 4(N) 400 ± 15 %V - 104 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 105 4. U ~ GND / V ~ GND / W ~ GND measurement 5. If the IPM measurement value is significantly different from the normal value, IPM abnormal judgment - 105 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 106 4. U ~ N / V ~ N / W ~ N / R ~ N / S ~ N / T ~ N measurement (Refer to the picture) 5. If the measured value is significantly different from the normal value, IGBTM abnormal judgment - 106 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 107 LGMV similar to the Replace High pressure sensort manifold? [Note 2] Check whether the pressure switch connector is short Take action after confirming blockage of piping - 107 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 108 Check Inverter PCB assembly PFC Part. Is Outdoor PCB PSC/PFC → Replace PCB assembly if abnormality Module normal? found. Recheck power and installation condition - 108 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 109 2. Check if another product with a large load is connected to the same power supply. Input Voltage CH23 or CH27 occurs when input voltage distortion occurs - 109 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 110 - Replace Reactor PCB assembly if abnormality found. ▶U3(3Ø : 12, 14, 16 kW) Check Reactor PCB assembly normality. - Replace Reactor PCB assembly if abnormality found. - 110 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 111 4. U ~ GND / V ~ GND / W ~ GND measurement 5. If the IPM measurement value is significantly different from the normal value, IPM abnormal judgment - 111 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 112 4. U ~ N / V ~ N / W ~ N / R ~ N / S ~ N / T ~ N measurement (Refer to the picture) 5. If the measured value is significantly different from the normal value, IGBTM abnormal judgment - 112 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 113 · Secure the distance between the in good condition? outdoor unit and the wall · Check for bent pipes and abnormalities CH__DISCHARGE_BK (BLACK 3Pin Connector) - 113 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 114 Do not replace PCB before EEV inspection. If an EEV is found, check the normal operation of the product after replacing the EEV. - 114 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 115 20.7 kΩ 10 kΩ 362 kΩ 25 ℃(77 ℉) 10 kΩ 5 kΩ 200 kΩ 50 ℃(122 ℉) 3.4 kΩ 1.8 kΩ 82 kΩ - 115 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 116 Connect sensor to PCB correctly PCB(Outdoor Cycle) correctly? After replacement of outdoor unit Main PCB(Outdoor Cycle) is the system also abnormal? Replace corresponding pressure sensor - 116 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 117 Re-inspect power and installation environment Main PCB EEPROM voltage measurement method How to check communication LED [Main PCB(Outdoor Cycle)] [Main PCB(Outdoor Cycle)] [Inv PCB(Outdoor)] - 117 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 118 ※ Refer to 3.17.2 Checking for open and reverse phase ※ Refer to 3.17.3 Fuse damage AC load (R and S phases) Inverter PCB - 118 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 119 - Operation with replacement of R and S phases only Br own B Black Green Br own B Black Green Br own B Black Green Br own Black Green - 119 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 120 PCB(Outdoor Cycle) (7-segment) Note: Turn off the power and replace the EEPROM. Inverter CH60 is displayed only on Inv CH60 PCB(Outdoor) (blinking LED) - 120 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 121 CN- C/PIPE (Violet 3Pin Connector) Recheck power and installation condition - 121 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 122 Check Point - Check connection condition of IPM/IGBTM and Heatsink -U3 (3Ø : 12, 14, 16 kW) Screw Hole (under the sticker) IGBTM IGBTM - 122 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 123 (However, if the PCB is not replaced, the motor is defective, thus replace the motor and restore the PCB.) Recheck power and installation environment - 123 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 124 U-V [Ω] U-W [Ω] V-W [Ω] (kW) 5, 7 , 9 EAU62543703 43.1±5% EAU62543703 43.1±5% 12, 14, 16 43.1±5% EAU62543704 * 25℃ standard - 124 - Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 125 P/NO : MFL68682007 Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

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