LG THERMA V ZHBW056A0 Service Manual
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LG THERMA V ZHBW056A0 Service Manual

LG THERMA V ZHBW056A0 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 © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

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Summary of Contents for LG THERMA V ZHBW056A0

  • Page 1 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 © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 2: Table Of Contents

    1. Checking Key Components of Indoor Unit 2. Checking Key Components of Outdoor Unit 3. Self-Diagnosis Feature 4. Trouble Shooting Guide - 2 - Copyright © 2018 - 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 © 2018 - 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 © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 5: Work Procedure

    1) The minimum floor area : 49.4 m 2) The maximum refrigerant charge amount : 2.4 kg - 5 - Copyright © 2018 - 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 © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 7: Cabling Check

    A halide torch (or any other detector using a naked flame) shall not be used. - 7 - Copyright © 2018 - 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 © 2018 - 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 © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 10 A vacu- um valve shall be provided to evacuate the interconnecting pipe and/or any uncharged refrigerating system part. - 10 - Copyright © 2018 - 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 © 2018 - 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 © 2018 - 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 © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 14: Model Information

    H: Air to Water Heat Pump Heating capacity Ex) 16 : 16 kW M : AWHP Monobloc H: Air to Water Heat Pump - 14 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 15: Model Name And Related Information

    (Leaving water temperature 18°C at outdoor ambient temperature 35°C / 24°C) ※ : All appliances were tested at atmospheric pressure. UN4 (5, 7, 9 kW) UN3 (9, 12, 14, 16 kW) - 15 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 16: External Appearance

    Item Image Installation Manual Outdoor Unit UN4 Chassis Outdoor Unit UN3 Chassis Remote Controller Remote Controller Cable Drain Cap Drain Nipple - 16 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 17 Main PCB assembly(A) This PCB controls the cycle parts of the unit Main PCB assembly(B) This PCB controls the functioning of the unit - 17 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 18 Main PCB assembly(A) This PCB controls the cycle parts of the unit Main PCB assembly(B) This PCB controls the functioning of the unit - 18 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 19 Main PCB assembly(A) This PCB controls the cycle parts of the unit Main PCB assembly(B) This PCB controls the functioning of the unit - 19 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 20: Part 2 Features & Controls

    Part 2 Features & Controls - 20 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 21: List Of Function

    Accessory model name : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package. 2. * : Some advanced functions controlled by individual controller cannot be operated. - 21 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 22 4. If you need more detail, please refer to the BECON PDB or the manual of product. (http://partner.lge.com/global : Home> Download> Manuals) - 22 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 23: 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 air conditioner - 23 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 24: Special Function

    In the lock setting list, if you press [∧,∨(up/down)] button, you can turn on/off the corresponding lock function. - 24 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 25: 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. - 25 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 26: 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. - 26 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 27: 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. - 27 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 28: 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. - 28 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 29: Schedule Setting

    When stages 1~4 are completed, along with the message of ‘schedule is added’, it moves to View and edit schedule screen. - 29 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 30 • 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. - 30 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 31: System Setup

    • Whenever adjusting DIP switch, turn off electric power supply to avoid electric shock. General Information OFF is selected ON is selected - 31 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 32: Dip Switch Information

    3Ø model : 1/3 capacity is used Full capacity is used Thermostat is NOT installed Thermostat installation information Thermostat is installed - 32 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 33 Only Dip-switch no.2 and no.3 has a function. Others have no function. • When setting the Partial Mode, Mode can be exited to secure capacity after operating for a certain time. - 33 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 34 But in emergency operation, automatic re-start is prohibited to protect the unit. Therefore, user must restart the unit after power reset when emergency operation has been running. - 34 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 35: Service Setting

    RMC Version Information Check the remote controller model name and software version. Open Source License View the remote controller’s open source license. - 35 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 36: 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. - 36 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 37: 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. - 37 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 38: Rmc Version Lnformation

    • In the service setting list, select the RMC version information and press [OK] button to move to the detail screen - 38 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 39: Open Source License

    • In the service setting list, select the open source license category, and press [OK] button to move to the detail screen. - 39 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 40: Installer Setting How To Enter Installer Setting Mode

    Input the password and press [OK] button to move to the installer setting list. - 40 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 41: Installer Setting

    Heating air temperature TH On / Off Type setting ting TH on/off Variable, heating Water Heating Water Outlet Temperature TH On / Off Type setting - 41 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 42 It is the function to initialize (0000) the password when you forgot the password Password Initialization setting set in the remote controller. - 42 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 43: Common Setting

    • Dry Contact Mode This function allows the dry contact operate under auto run mode or manual mode with remote controller. - 43 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 44: Temperature Range Setting

    • Screed drying mode After installing water pipes for under floor heating, user can select screed drying mode for curing the cement. - 44 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 45 • 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) - 45 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 46 Session C : No heating (Booster heater is Off) Session D : Heating by booster heater DHW heating does not operate when it is disabled. - 46 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 47: Temperature Control Parameter Setting And Etc

    It is a function to adjust the cooling water temperature Thermal On / Off temperature according to the field environment in order to offer optimized heating operation. - 47 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 48 When you press “initialization” button, a popup screen appears, and when you press “check” button, password initialization starts, and the user password is changed to 0000. - 48 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 49 1=active / 0=not active ❈ A = Active time ❈ S = Stop time ❈ B = Boost heater delay time - 49 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 50 Pump Prerun operates to ensure sufficient flow before the compressor is operated. This is a function that allows heat exchange to work smoothly. - 50 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 51: Test Run

    * Check for abnormal sound in difference between intake and outdoor unit (comp.,Fan, others ) discharged water? * Refer to Troubleshooting Guide Normal - 51 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 52: How To Drain Remaining Water In The Product

    - To use the product again, you have to refill water in it. Refer to ‘Water Charging’ of ‘Installaion’ part in installation manual. - 52 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 53: Part 3 Basic Control

    Part 3 Basic Control - 53 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 54: Normal Operation

    Tevaporator : evaporation temperature (℃) ＊Heating mode the target temperature of discharge pipe = T condenser + α T condenser : condenser temperature (℃) - 54 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 55: Part 4 Replacement

    Part 4 Replacement - 55 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 56: 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 Suction pipe - 56 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 57: 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. - 57 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 58: Caution For Assembling Outdoor Panels After Test Run

    If screws are not assembled, it allows rain come into control box causing defect of unit. - 58 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 59: Part 5 : Trouble Shooting

    Part 5 Trouble Shooting - 59 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 60 2. Self-Diagnosis Feature..............67 2.1 Concept of ‘Classified Trouble’ ...............67 2.2 Error Indicator...................68 2.3 Error Code List..................70 3. Trouble shooting Guide ................72 - 60 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 61: 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. - 61 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 62: Water Pump

    In this case, contact official After Service Center and replace the unit PCB. • To correct wrong wiring, please refer Ⓐ. - 62 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 63: Back Up Heater

    If the reason of malfunction is clearly proved as the defect of the back up heater itself, then replace it with new one. - 63 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 64: Remote Controller

    Unless 2nd and 3rd pin of DIP switch setting is OFF-ON or ON-OFF, the water tank heating will not be configured. - 64 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 65: Compressor

    (when measuring absolute values). Accurate measuring values cannot be obtained with a general portaable tester (For analog and digital mode). - 65 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 66: Fan Motor

    3. If problems continue to occur even after counter- measure of No.1 and No.2, it means that both boards has defect. - 66 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 67: 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. - 67 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 68: 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. - 68 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 69 CN_RELAY1 CN_PIPE_OUT CN_ROOM CN_RELAY2 CN_PIPE_IN CN_B_HEAT_A CN_TH4 CN_E_HEAT_B CN_TH3 CN_W_PUMP_B CN_E_HEAT_A CN_3WAY_C CN_3WAY_B CN_3WAY_A CN_2WAY_A CN_COM CN_W_PUMP_A CN_MOTOR1 CN_POWER CL_SOLAR CN_THMO1 - 69 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 70: 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. - 70 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 71 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. - 71 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 72: Trouble Shooting Guide

    Is the sensor resistance or the voltage across the sensor • Replace the sensor coupling normal? Replace the Main PCB(Indoor) - 72 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 73 ± 5 %. * There may be some errors depending on the measurement equipment. - 73 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 74 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 - 74 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 75 Is the DC12V supply voltage of the wired remote controller Inspect Main PCB and replace measured normally? Inspect Wired remote controller and replace - 75 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 76 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. - 76 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 77: 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. - 77 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 78 - CH05: Check the Main PCB(Outdoor Cycle) and check the Main PCB(Indoor) - CH53: Check the Main PCB(Indoor) and then check the Main PCB(Outdoor Cycle) - 78 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 79 ▶12 / 14 / 16 kW: Check the connection state of the PCB connection harness CN_COM SINGLE CN_COM CN_COM CN_COM SINGLE SINGLE SINGLE CN_COM Main PCB(Outdoor Cycle) Main PCB(Indoor) SINGLE - 79 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 80 Code is Displayed 3. After Checking the connection and Insertion, replace the PCB or Option PCB Check groove direction CN_OPTION - 80 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 81 Check and change the Operation at PCB Pump circulation pump Signal Output Check PCB Pump Signal Check PCB and Change Output Voltage - 81 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 82 Remove the strainer fixing clip at the bottom as shown. Pull out the strainer and clean it. Open the valve after tightening in the reverse order of separation. - 82 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 83 Detect both pump run / stop conditions (When no external pump is installed) Flow sensing Only under pump operating conditions (When external pump is installed) - 83 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 84 ③ Measure the flow switch resistance according to the pump operation after turning on the input power. ※ After measuring the flow switch resistance, the DIP. Restore switch state to previous state. - 84 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 85 *Flow switch circuit tester Note) Check flow switch normal 1) Flow Switch Short (0 Ω) 2) Flow switch open (many MΩ) - 85 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 86 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 - 86 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 87 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. - 87 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 88 Temp. sensor Piping temp. sensor kΩ kΩ kΩ Measure Indoor unit outlet piping temperature sensor resistance Inlet pipe Temp. sensor - 88 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 89 Replace the Main PCB(Indoor) Water out Water in Back up Heater Out Voltage (at 25 ℃) CN_TH3 Water Out 2.232 Water In 2.232 - 89 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 90 50 ℃ 1.7 kΩ 55 ℃ 1.4 kΩ 0.9 V 60 ℃ 1.2 kΩ 0.8 V 65 ℃ 0.7 V 1 kΩ - 90 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 91 - 3Ø Model : After checking that the temperature is below 70 °C, reconnect the power. (automatic reset) Water out Water in Back up Heater Out CN_TH3 - 91 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 92 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. - 92 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 93 4. Turn on Power 5. Remote Controller Off (Stop mode) 6. Connect LGMV 7. Wait 30seconds. 8. Check compressor and fan off - 93 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 94 9. Perform diagnostic function PC LGMV Mobile LGMV - 94 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 95 · Connector reconnection: replacement when defective in good condition? Is IGBTM normal? · Inv PCB(Outdoor) replacement Recheck power and installation condition - 95 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 96 0.845 Ω(at 25 ˚C) 0.845 Ω(at 25 ˚C) 3Ø 12 kW / 14 kW / 16 kW 0.845 Ω(at 25 ˚C) - 96 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 97 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 - 97 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 98 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 - 98 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 99 - 3Ø: Check if the R-S / R-T / S-T input voltage is within AC 400V ± 15 % Is the Inv PCB(Outdoor) normal? · Inv PCB(Outdoor) IPM check - 99 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 100 Normal 15 V : 15 V ± 10% V Normal 5 V : 5 V ± 10% V Inv. Inv. Inv. 15 V - 100 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 101 Check DC voltage when power is applied Normal 5 V : 5 V ± 10% V INPUT_CURRENT <Inverter PCB> <CT Sensing Check Point > - 101 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 102 Is the DC link voltage detector DClink voltage detection part parts normal? burnout, work defect check * Action: Replace Inv PCB (Outdoor) - 102 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 103 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 - 103 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 104 3. Measurement of each part (see photo) 4. If the measured value is significantly different from the normal value, the part is judged abnormal - 104 - Copyright © 2018 - 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 © 2018 - 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 judg- ment - 106 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 107 Replace High pressure sensort manifold? [Note 2] Check whether the pressure switch connector is short Take action after confirming blockage of piping - 107 - Copyright © 2018 - 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 © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 109 ▶UN4(1Ø : 5, 7, 9 kW) Check Reactor PCB assembly normality. - Replace Reactor PCB assembly if abnormality found. - 109 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 110 - Replace Reactor PCB assembly if abnormality found. ▶UN3(3Ø : 12, 14, 16 kW) Check Reactor PCB assembly normality. - Replace Reactor PCB assembly if abnormality found. - 110 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 111 3. Measurement of each part (see photo) 4. If the measured value is significantly different from the normal value, the part is judged abnormal - 111 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 112 4. U ~ GND / V ~ GND / W ~ GND measurement 5. If the IPM measurement value is significantly different from the normal value, IPM abnormal judgment - 112 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 113 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 judg- ment - 113 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 114 · Secure the distance between the in good condition? outdoor unit and the wall · Check for bent pipes and abnormalities CN_TH3 (RED 4Pin Connector) - 114 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 115 Do not replace PCB before EEV inspection. If an EEV is found, check the normal operation of the product after replacing the EEV. - 115 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 116 10 kΩ 362 kΩ 25 ℃(77 ℉) 10 kΩ 5 kΩ 200 kΩ 50 ℃(122 ℉) 3.4 kΩ 1.8 kΩ 82 kΩ - 116 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 117 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 - 117 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 118 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)] - 118 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 119 ※ 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 - 119 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 120 - 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 - 120 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 121 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) - 121 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 122 CN- C/PIPE (Violet 3Pin Connector) Recheck power and installation condition - 122 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 123 Recheck Power and installation condition Check Point - Check connection condition of IPM/IGBTM and Heatsink Screw Hole (under the sticker) IGBTM IGBTM - 123 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 124 (However, if the PCB is not replaced, the motor is defective, thus replace the motor and restore the PCB.) Recheck power and installation environment - 124 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 125 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 - 125 - Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 126 P/NO : MFL68026803 Copyright © 2018 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

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