Page 1 SVC MANUAL(General) MODEL : Multi-Inverter Type(R410A) CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel. Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 2: Table Of Contents
3. Evacuation......................79 4. Gas Charging ......................80 5. Cycle Part ......................81 6. Electronic Parts....................82 Part 6 Service Order.........................174 1. PCB Service Order ....................175 - 1 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 3: Part 1 General Information
Part 1 General Information 1. Safety Precautions ......................3 2. Model Line Up ........................12 3. Nomenclature........................18 - 2 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 4: Safety Precautions
Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks. - 3 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 5 • The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as specified for operation • Compliance with national gas regulations shall be observed - 4 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 9 Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is ventilation available. - 8 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 10 Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked. - 9 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 11 Do not tilt the unit when removing panels. Otherwise, the water inside the unit can spill and wet floor. - 10 - Copyright © 2016 - 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. - 11 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 13: Model Line Up
4-Way [CT18R NQ0] ZTNW24GPLA0 [CT24R NP0] AVNH09GELA2 AVNH12GELA2 [CV09 NE2] [CV12 NE2] Ceiling & Floor UVNH18GJLA2 UVNH24GJLA2 [CV18 NJ2] [CV24 NJ2] - 12 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 14 Concealed AMNW12GL2A* AMNW18GL2A* Duct Static ZBNW09GL2A0 ZBNW12GL2A0 ZBNW18GL2A0 Pressure AMNW24GL3A* ZBNW24GL3A0 AQNH09GALA0 AQNH2GALA0 AQNH18GALA0 Console [CQ09 NA0] [CQ12 NA0] [CQ18 NA0] - 13 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 15 No.of connectable indoor units Max.4 Total capacity index of connectable 11.4 kBtu/h indoor units Power supply 1 Ø, 220-240 V, 50 Hz Chassis - 14 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 16 Max.9 21.1 22.3 24.6 Total capacity index of connectable indoor units kBtu/h Power supply 1 Ø, 220-240 V, 50 Hz Chassis - 15 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 17 Max.9 21.1 22.6 24.6 Total capacity index of connectable indoor units kBtu/h Power supply 3 Ø, 380-415 V, 50 Hz Chassis - 16 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 18 Max. 3 Max. 4 Model name PMBD3620 PMBD3630 PMBD3640 Connectable indoor unit capacity 1.5~7.0 1.5~7.0 1.5~7.0 kBtu/h 5~24 5~24 5~24 BD unit - 17 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 19: Nomenclature
Indicates that this is multi system outdoor unit using R410A Ex) A4U : Connectable max. 4 indoor units A9U : Connectable max. 9 indoor units - 18 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 20 AM,PM,PC,DM,DC,MJ,P,S : Wall mounted / ARTCOOL mirror MA : ARTCOOL MT,CT: Ceiling Cassette CB,CM : Ceiling Concealed Duct CV : Ceiling Suspended & floor CQ : Console - 19 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 21 “36” mean that 5k~24k Indoor unit connected to BD unit BD : Branch distributor M : Multi system outdoor unit P : Parts - 20 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 22: Part 2 Functions & Controls
7. Special Function & KIT ....................62 7.1 Low Ambient control....................62 7.2 Space Control ......................62 7.3 Auto Elevation Grille....................62 7.4 Defrost Control(Heating) .....................64 - 21 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 23: List Of Functions & Controls
Part 2 Functions & Controls 1. List of Functions & Accessory Note - 22 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 47: Air Flow
Mode9 Mode8 Mode7 Mode6 Mode5 Mode4 Mode3 7~8° Mode2 OPEN NOTE: Some Models are different by swing width and swing pattern. - 46 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 48: Air Flow Step
After one minute, it is opposite. Vane 4 • Comparison of Air Flow Types 4-Open (conventional) Swirl Swing (New) - 47 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 49: Air Purifying
Dust electrode discharge Dust particles Photo-Catalyst Coated Mesh Ionizer +4.8KV discharge Polluted Air Purified fresh Air Generating plasma Odour Odour molecule - 48 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 50: Installation Functions
When exiting without pressing set button, the manipulated value is not reflected. <Static Pressure Setting Table> Function Pressure selection Zone state ESP standard value Variable High Fixed High Variable Fixed - 49 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 51 - Be sure to set the value refering table 1. Unexpected set value will cause mal-function. - Table 1 is based at 230 V. According to the fluctuation of voltage, air flow rate varies. - 50 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 52 11(108) 12(118) 13(127) 15(147) Model Step Setting Value 32:01 32:02 32:03 32:04 32:05 32:06 32:07 32:08 32:09 32:10 32:11 UM60R.N30 HIGH - 51 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 53 & E.S.P. which are mentioned in the table. 2. Table data is based at 230V. According to the fluctuation of voltage, air flow rate varies. - 52 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 54: High Ceiling Operation
• Ceiling height of ‘Very high’ function may not exist depending on the indoor unit. • Refer to the product manual for more details. - 53 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 55: Reliability
Compressor ON Temp. ‘ Setting Temp+0.5°C Compressor OFF Temp. ‘ Setting Temp-0.5°C • In 10-min dehumidification operation, the indoor fan operates with the low airflow speed. - 54 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 56: Convenience Functions & Controls
Thermo ON : Setting temp. Thermo OFF : +4 °C above setting temp. Thermo OFF : +3 °C above setting temp. - 55 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 57: Auto Cleaning Operation
Fuzzy rule. • While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature. - 56 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 58: Auto Restart Opeartion
Memorized condition are on / off condition, operating mode (cooling/ heating), set temperature and fan speed. The unit will memorize the above conditions and start with same memorized condition. - 57 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 59: Child Lock Function
- The operation will be started if the ON/OFF button is pressed. - If you want to stop operation, re-press the button. - 58 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 60: Group Control
• When controlling in groups, set the master/slaver of the remote controller. Refer to Installer setting section on how to set mas- ter/slave for more detail. - 59 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 61: Sleep Timer Operation
Operation Time Table (Example) Setting Temp. 25°C 25°C 25°C 25°C 25°C 09:00 08:00 09:00 08:00 09:00 12:00 17:00 12:00 12:00 12:00 - 60 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 62: Two Thermistor Control
Operation of lower temperature by comparing indoor unit's and wired remote Heating controller's temperature. h The function of 2TH has different operation characteristics according to the product. - 61 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 63: Special Function & Kit
3.1 m. So it enables to install the Indoor unit at high ceiling space. And Auto Elevation Grille makes you cleaning the filter easily. - 62 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 64 • In case when obstacle such as curtain hides the signal reception part of receiver in between the space interval, Remote Controller operation is infeasible. - 63 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 65: Defrost Control(Heating)
• The second defrost starts only when the outdoor pipe temperature falls below – 6°C after from ending of the first defrost and more than 10 minutes operation of compressor. - 64 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 66: Part 3 Basic Control
1. Normal operation......................66 2 Compressor control ......................66 3. EEV( Electronic Expansion Valve) control ..............66 4. Oil return control ......................67 5. Defrost control .........................67 - 65 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 67: Normal Operation
※ 14, 16k Models EEV operates with PI control rules to keep the degree of superheat at the evaporator inlet and outlet status. - 66 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 68: Oil Return Control
Min. Pulse Setting value Min. Pulse 4 way valve Indoor unit Component Starting Running Ending Normal control Normal control Oil return signal - 67 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 69: Part 4 Test Run
4. Test Run 4. Test Run 1. Check before Test Run.....................69 2. Test Run Flow chart ......................70 3. Test Running ........................71 - 68 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 70: Check Before Test Run
2.0 MΩ as a result of refrigerant accumulation in the internal compressor. If the insulation resistance is less than 2.0 MΩ, turn on the main power supply. - 69 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 71: Test Run Flow Chart
After Hot Start Guide Normal • Each indoor unit should be tested. • If the unit has accessory, it should be tested. - 70 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 72: Test Runing
In the case when the vibration of the unit is conveyed to the hose, secure the unit with an anti-vibration rubber. Discharge temperature - 71 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 73 PCB Assembly to the ' CEILING' state. h The initial state of the slide switch is set for the bottom installation. CN_INSTALL CEILING BOTTOM - 72 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 74 Is the heat insulation complete o Aren't terminal screws loosened? (refrigerant and drain piping)? o Is there any leakage of refrigerant? M4..118N.cm{12kgf.cm} M5..196N.cm{20kgf.cm} M6..245N.cm{25kgf.cm} M8..588N.cm{60kgf.cm} - 73 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 75: Part 5 Trouble Shooting Guide
6.4 When indoor Fan does not operate................85 6.5 When the louver does not operate................86 6.6 Troubleshooting Indoor Error ..................87 6.7 Troubleshooting Outdoor Error ...................94 - 74 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 77 7times ◑ 3times ◑ Over Current of Outdoor Unit PFC PFC Fault Error(S/W) ◑ : A light on the display panel is blink. - 76 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 78: Pump Down
– Open the low-pressure valve on the charge set slightly to air purge from the charge hose. (5) Set the 2-way valve to the closed position. - 77 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 79: 18K~56K
4. Pump Down can be stopped (The compressor is turned off), because of compressor protection. In this case, reset the power. - 78 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 80: Evacuation
Oxygen and do not use Flammable gases. pump). Otherwise, it may cause fire or explosion. - Otherwise, it may cause personal injury. - 79 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 81: Gas Charging
- Any presence of foreign substance such as air repeat the procedure (pumping down-pin). can cause an abnormal pressure rise and may result in explosion or injury. - 80 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 82: Cycle Part
1. The suction pressure is usually 8.5~9.5kg/cm2G(Cooling) at normal condition.(R410A) 2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty. - 81 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 83: Electronic Parts
4) DC5V 4) Replace PCB Assembly 5) IC01A(KIA7036) 5) The voltage of micom pin 19 5) Replace PCB Assembly : DC4.5V↑ - 82 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 84: The Product Doesn't Operate With The Remote Controller
* Check display PCB Assembly - Voltage between CN-DISP1 should be DC +5V, - If problem still persists, Replace display PCB - 83 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 85: The Compressor/Outdoor Fan Are Don't Operate
Turn off main power. Check the electrical wiring diagram of Outdoor side. Check the open or short of connecting wires between Indoor and Outdoor. - 84 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 86: When Indoor Fan Does Not Operate
The voltage of Pin No 1(orange) and 3(black) of CN-FAN. About AC 160V over About AC 50V over SSR is not damaged Check SSR - 85 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 87: When The Louver Does Not Operate
If there are no problems after above checks. • Confirm the assembly condition that are catching and interfering parts in the link of the vertical louver - 86 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 88: Troubleshooting Indoor Error
CN_PIPE_IN : Pipe inlet temp sensor CN_PIPE_OUT : Pipe outlet temp sensor CN_ROOM : Indoor air temp sensor Measure the resistance of outlet pipe temp sensor. - 87 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 89 CN_REMO : Remote controller connection The PCB can differ from model to model. Check from the right source. Checking communication cable connection status - 88 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 90 * If the float goes up higher than a half of float switch then the circuit is open & the unit is stopped automatically. (High position Open) float Condensate water - 89 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 91 (Check input of DC 15 V) (Marked as CN_DCDRAIN) [***] Standard of drain pipe head height / slope 1/50~1/100 MAX 450 MAX 700 mm - 90 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 92 - Replace the indoor unit PCB, and then make sure to perform Auto addressing and input the address of central control - 91 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 93 (Notice: The connection of motor connector to PCB should be done under no power supplying to PCB) - 92 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 94 DC link detection circuit fault. Improper power input, IPM connection fault, and insufﬁcient distance Others between heat sink and control panel. - 93 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 95: Troubleshooting Outdoor Error
Checking DC single connection PCBA current link voltage unit of IPM state detection circuit ❈ Checking screws for no connection or unfastening - 94 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 96 300 mm 700 mm 1.2 m (Wind direction) ■ When the front/back/left/right have walls (3 sides) 300 mm 700 mm 300 mm - 95 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 97 EEV when the power is applied for the first time. SVC Valve SVC Valve Full Open Check EEV Check Replacing EEV - 96 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 99 Check whether the PCB wires and compressor wires [Picture of normal compressor wiring] are connected in the same colors. [Picture of normal compressor wiring] - 98 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 100 5. If the measurements are significantly different from the levels shown in the figures, the IPM is deemed to be damaged. 0.3 V~0.5 V 0.3 V~0.5 V 0.3 V~0.5 V 0.3 V~0.5 V 0.3 V~0.5 V 0.3 V~0.5 V - 99 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 101 Judge IPM Pins for short. ■ IPM Check Point Division IPM Check Point 2.5 kW [IPM Pin Arrangement and Pin Numbers] - 100 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 102 5. Trouble Shooting ■ IPM Check Point Division IPM Check Point 4 kW IPM Check Point 4 kW - 101 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 103 ■ IPM Check Point Division IPM Check Point 4.5kW COMP_IPM 6 kW 25 26 27 29 32 33 [IPM Pin Arrangement and Pin Numbers] - 102 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 104 IGBTM Low side Didoe 0.35 V Non-normal 0.7 V IGBTM Hige side IGBT IGBTM IGBTM Low side IGBT BLACK DC_Link IGBTM - 103 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 106 5. Trouble Shooting ■ Current Detection Circuit Check Point Division Compressor Phase Current Detection 2.5 kW Comp Current 4 kW - 105 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 107 5. Trouble Shooting ■ Current Detection Circuit Check Point Division Compressor Phase Current Detection INV_Current INV_Current INV_Current 4 kW 2.5 V Black - 106 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 108 5. Trouble Shooting ■ Current Detection Circuit Check Point Division Compressor Phase Current Detection 6 kW 7 kW Inverter Current GND_INV - 107 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 112 5. Trouble Shooting ■ LGMV Display When Heating, LED turn on When Cooling, LED turn off - 111 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 113 45 ±5 45 ±5 45 ±5 [Pin No.] ※ There may be the difference in the resistance depending upon the EEV Specifications. - 112 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 115 1. Check DC Link Sensing Signal measurements at Power-on standby state. (DC 2.4 ~ 2.8 V) 4 kW DC_LINK DC_LINK Black 4.5kW - 114 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 116 5. Trouble Shooting ■ DC Link Detection Circuit Check Point Division DC Link Detection Circuit Check Point 6 kW 7 kW GND_INV Link_Voltage - 115 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 117 Controller Voltage 2~4 kW 140 V DC Link NG Voltage level Controller Voltage 6 kW 140 V 7 kW 380 V - 116 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 118 Short between compressor coil and Panel, abrasion of compressor, and Expected Compressor short/opening of compressor coil. Causes Input current detection circuit fault. Assembly Others Input of low-voltage. - 117 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 119 Checking Checking Checking Checking compressor compressor compressor compressor Phase resis- insulation wiring tance resistance Checking input Checking current PCBA detection circuit - 118 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 121 5. Trouble Shooting Division Input Current Detection Point Input_I 2.5 kW 4 kW I_IN I_IN 2.5 V Black 4.5 kW - 120 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 122 5. Trouble Shooting Division Compressor Phase Current Detection 6 kW 7 kW Input Current GND_INV - 121 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 124 Installation fault and input of low-voltage power Expected Causes Damage of DC link voltage detection circuit and reactor terminal Assembly connection error - 123 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 125 ❈ Check the wire for possible coat chopping and short. Checking Checking DC Checking Link voltage reactor connection charging PCBA circuit state - 124 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 126 CH 23 (DC Link Voltage Low) Checking Reactor Connection Division Reactor Connector Point 2.5 kW IN IN 4 kW 4.5 kW 6 kW 7 kW - 125 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 129 5. Trouble Shooting ■ B/Diode of Discrete PFC Point Division PFCM Point 6 kW 4.5 kW - 128 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 130 IGBTM Low side Didoe 0.35 V Non-normal 0.7 V IGBTM Hige side IGBT IGBTM IGBTM Low side IGBT BLACK DC_Link IGBTM - 129 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 131 (Outdoor covering during the cooling mode / Indoor unit filter clogging during the heating mode) 8. SVC valve clogging 9. Defective outdoor PCB - 130 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 132 Is high pressure of LGMV similar as Replace high pressure switch at manifold gauge? Check pipe is blocked or not and take measure - 131 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 133 UU24WR 6/7 kW(Main) 6 kW(Inv) 7 kW(Inv) UU36/42/48/60WR UU37/43/49/61WR Note2 Check Point Normal : Short Abnormal : Open High pressure switch - 132 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 134 IPM parts fault, compressor current detection circuit fault, and DC link Assembly detection circuit fault Input of abnormal power, IPM connection fault, and power connection Others fault - 133 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 135 Checking DC single connection current PCBA link voltage unit of IPM state detection circuit ❈ Checking screws for no connection or unfastening - 134 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 136 Input of abnormal power, power connection fault, reactor terminal con - Others nection fault, and faulty distance between heatsink and sash - 135 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 137 Checking compressor compressor compressor compressor phase insulation wiring resistance resistance Checking Checking input Checking PFC circuit current detection PCBA part circuit - 136 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 139 Checking compressor compressor compressor compressor phase insulation wiring resistance resistance Checking Checking input Checking PFC circuit current detection PCBA part circuit - 138 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 141 Compressor current and DC link voltage detection circuit fault Assembly Sensor Discharge temperature sensor fault ❈ IPM (Intelligent Power Module) : The part to control the inverter compressor - 140 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 142 ❈ Refer to manifold gauge Checking Checking Checking Checking compressor compressor compressor compressor phase insulation wiring resistance resistance Checking Checking outset PCBA Temperature sensor - 141 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 143 Indoor unit or outdoor unit fan failure Others EEV defect h IPM (Intelligent Power Module) : The part to control the inverter compressor - 142 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 144 If it is measured in power supply stand by state, check the tester’s measurement mode and be careful of the short circuit with parts other than the measurement part. - 143 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 145 EEV connector falling off / EEV assembly defect h IPM (Intelligent Power Module) : The part to control the inverter compressor - 144 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 146 If it is measured in power supply stand by state, check the tester’s measurement mode and be careful of the short circuit with parts other than the measurement part. - 145 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 147 (Based on 25 ℃ of surrounding temperature) 3. Sensor insulation resistance : The resistance between the sash and sensor terminal should be not less than 1MΩ. - 146 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 148 - Position : Rear part of outdoor device Outdoor temperature sensor - Sensor value : 10 kΩ ± 10 % (Based on 25 ℃) Ω - 147 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 149 - In case of UU09WR, UU12WR Model, check the ejection of Sub PCB. Ejection of sub PCB Insert the sub PCB to the Main PCB - 148 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 150 Condition for Generation outdoor device Re-installation of products ■ Judgment Method Same capacity → ok Indoor capacity > Outdoor capacity → NG - 149 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 151 Chassis Panel power source wire coating ※ It should not be short Replacement of LED Off inverter PCB Replacement of main PCB - 150 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 152 : Interference with wires or wire coating damage with chopping Inverter PCB LED : Replacement of inverter PCB during LED Off after resetting - 151 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 153 Replacing Communication Communication indoor Grounding cable length cable length If length is 50 m over, Please separate communication wire - 152 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 154 Check fuse state Check whether outdoor PCB LED is lighted. Division Fuse Point 2/2.5 kW 4 kW 4.5 kW 6 kW 7 kW - 153 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 155 Neutral Wire-to-Wire Wire tongue-termination fault. Communication noise by oxidized wire arrangement : Soldering is required. Neutral - 154 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 157 Live and Pipe Pipe Neutral and Pipe Pipe ∞ ∞ Ω Ω Check Resistance Check Resistance Communication Line and Pipe Pipe ∞ Ω - 156 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 158 6.7 Troubleshooting Outdoor Error CH 05/53 (Indoor/Outdoor Device Communication Error) → Detection by indoor devices Check LGMV Communication rate Communication rate (Normally 90 % - 157 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 159 -. It helps outdoor unit communicate with indoor unit better than before and reduce the noise level [Connector with capacitor in CN_Flash_Writer or CN_Flash] Connector with capacitor in CN_FLASH and CMN_CNVSS - 158 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 160 Installation Checking N-phase phase loss Checking for open and reverse phase Fuse damage AC load (R and S phases) Inverter PCB - 159 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 161 Set the tester in AC voltage measurement mode (The part having wave pattern) N-phase N-phase N-phase N-phase N-phase unavaila unavaila unavaila phase availab N-phase N-phase N-phase phase phase phase unavaila availa availa availa - 160 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 162 - Operation with replacement of R and S phases only Brown B Black Green Brown B Black Green Brown B Black Green Green - 161 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 163 (Shape of marking line and direction of EEPROM) Check whether EEPROM is perfectly adhered. Check whether EEPROM lead is put out of the outlet. - 162 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 164 Division EEPROM Position 4 kW EEPROM [Inverter PCBA] [EEPROM PCBA] 4.5 kW 6 kW Inv. 6/7 kW Main 7 kW Inv. - 163 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 165 Checking EEV for Pipe Checking fan Cycle proper working blocking for working Properties Sensor of unit Replacing - 164 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 166 Checking for proper working Restoration of Checking for proper working temperature ❈ Heat sink Error Temperature standard: 95 ℃ Replacing PCB - 165 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 167 Heatsink High NG Temperature level Controller Temperature level 4 kW 95 °C 4.5 kW 95 °C 6 kW 85 °C 7 kW 125 °C - 166 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 168 3. Measure the resistance Heat sink Temp point (Refer to the next page) (based on 25 ℃, 10 kΩ ± 10 %) - 167 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 170 2) Both the fan and PCB may be damaged when the fan connector is inserted in reverse direction.. 3) If fan motor fault is identified, PCB should be also replaced in consideration of possible damage of PCB. - 169 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 171 Normal resistance (±10 %) ∞ ∞ Dozens kΩ Dozens kΩ ~hundreds kΩ ~hundreds kΩ ∞ ∞ Dozens kΩ Dozens kΩ ~hundreds kΩ ~hundreds kΩ - 170 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 172 0.35 V~0.55 V 0.35 V~0.55 V 0.35 V~0.55 V 0.35 V~0.55 V 0.35 V~0.55 V 0.35 V~0.55 V 0.35 V~0.55 V - 171 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 173 Judge Fan IPM Pins for short. ■ Fan IPM Check Point Division Fan IPM Check Point 4.5 kW 26 24 FAN_IPM - 172 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 174 < Noise Filter wiring Check Point > < Input Power Source Check Point > < Inverter PCB wiring Check Point > - 173 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 175: Part 6 Service Order
6. Service Order Part 6 Service Order 1. PCB Service Order ......................175 - 174 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 176: Pcb Service Order
Tighten PCB Screws (4ea) Raise PCB and Re-wire terminal Assemble C/Box and Top Cover take terminals from PCB into a complete whole - 175 - Copyright © 2016 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

LG AMNW07GSJA0 Svc Manual

Table of Contents

Part 2 Functions & Controls

1 List of Functions & Controls

2 Air Flow

3 Air Purifying

4 Installation Functions

5 Reliability

6 Convenience Functions & Controls

7 Special Function & KIT

Part 5 Trouble Shooting Guide

1 Self-Diagnosis Function

2 Pump down

3 Evacuation

4 Gas Charging

5 Cycle Part

6 Electronic Parts

Quick Links

Chapters

Troubleshooting

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Summary of Contents for LG AMNW07GSJA0

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Table of Contents