LG ABNH09GL1A2 Svc Manual Download Page 106

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LGE Internal Use Only

4. Trouble Shooting

Items for

checking

Sub-items for

checking

Checking

power source

Installation

Checking

PCBA

Checking

input voltage

Checking

the wire

coating of

power source

Checking

compressor

wiring

Checking

power

connection

state

Checking

compressor

phase resis-

tance

Checking Bridge

Diode

(Limited to Multi-V

Model only)

Ⲽ$IFDLGPS"$_7

Ⲽ3FGFSUPQBHF

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6.7 Troubleshooting Outdoor Error

CH 23 (DC Link Voltage Low)

Summary of Contents for ABNH09GL1A2

Page 1: ...Air Conditioner SVC MANUAL General CAUTION Before Servicing the unit read the safety precautions in General SVC manual Only for authorized service personnel Internal Use Only http biz lgservice com ...

Page 2: ...1 List of Functions Accessory 16 2 Air Flow 27 3 Air Purifying 29 4 Installation Functions 30 5 Reliability 41 6 Convenience Functions Controls 42 7 Special Function KIT 50 Part 3 Basic Control 53 1 Normal operation 54 2 Compressor control 54 3 EEV Electronic Expansion Valve control 54 Part 4 Trouble Shooting Guide 55 1 Self diagnosis Function 56 2 Pump Down 58 3 Evacuation All amount of refrigera...

Page 3: ... 3 Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 1 Safety Precautions 4 2 Model Line Up 7 3 Nomenclature 11 Part 1 General Information ...

Page 4: ...ment is connected to the power cables This volt age is extremely dangerous and may cause death or severe injury if come in con tact with it Do not touch the discharging refrigerant gas during the repair work The discharging refrigerant gas The refrigerant gas can cause frostbite Release the refrigerant gas completely at a well ventilated place first Otherwise when the pipe is disconnected refriger...

Page 5: ... before connect or disconnect connector or parts damage may be occurred Do not use a defective or underrated circuit breaker Use the correctly rated breaker and fuse Otherwise there is a risk of fire or electric shock Install the panel and the cover of control box securely Otherwise there is risk of fire or electric shock due to dust water etc Indoor outdoor wiring connections must be secured tigh...

Page 6: ...arge section and the non charge metal section Earth position If the resistance value is low a disaster such as a leak or electric shock is caused at userʼs side Check the drainage of the indoor unit after the repair If drainage is faulty the water to enter the room and wet floor Check to see if the power cable plug is not dirty or loose If the plug is dust or loose it can cause an electrical shock...

Page 7: ...G ABNH30GGLA2 UB30 NG2 ABNH36GGLA2 UB36 NG2 BR ABNH42GRLA2 UB42 NR2 ABNH48GRLA2 UB48 NR2 ABNH60GRLA2 UB60 NR2 High Static Pressure M1 ABNW18GM1A0 CM18 N14 ABNW24GM1A0 CM24 N14 ABNW30GM1A0 UM30 N14 M2 ABNW36GM2A0 UM36 N24 ABNW42GM2A0 UM42 N24 M3 ABNW48GM3A0 UM48 N34 ABNW60GM3A0 UM60 N34 Low Static Pressure L1 ABNH09GL1A2 CB09L N12 L2 ABNH12GL2A2 CB12L N22 ABNH18GL2A2 CB18L N22 L3 ABNH24GL3A2 CB24L ...

Page 8: ...t Low static pressure ABNH09GL1A2 CB09L N12 ABNH12GL2A2 CB12L N22 ABNH18GL2A2 CB18L N22 ABNH24GL3A2 CB24L N32 Ceiling Cassette 4 way ATNH09GRLE2 CT09 NR2 ATNH12GRLE2 CT12 NR2 ATNH18GQLE2 CT18 NQ2 ATNH24GPLE2 CT24 NP2 ATNH30GPLE2 UT30 NP2 ATNH36GNLE2 UT36 NN2 ATNH42GMLE2 UT42 NM2 ATNH48GMLE2 UT48 NM2 ATNH60GMLE2 UT60 NM2 Ceiling Floor Ceiling Suspended AVNH09GELA2 CV09 NE2 AVNH12GELA2 CV12 NE2 UVNH...

Page 9: ...able indoor units kW 2 5 3 5 5 0 Power supply 1Ø 220 240V 50Hz Chassis DC Inverter AUUW246D2 UU24W U42 AUUW306D2 UU30W U42 AUUW366D2 UU36W UO2 No of connectable indoor units 1 Total capacity index of connectable indoor units kW 7 1 8 0 10 0 Power supply 1Ø 220 240V 50Hz Chassis DC Inverter Synchro AUUW426D2 UU42W U32 AUUW486D2 UU48W U32 AUUW606D2 UU60W U32 No of connectable indoor units 1 4 Total ...

Page 10: ...UUW368D2 UU37W UO2 No of connectable indoor units 1 Total capacity index of connectable indoor units kW 10 0 Power supply 3Ø 380 415V 50Hz Chassis DC Inverter AUUW428D2 UU43W U32 AUUW488D2 UU49W U32 AUUW608D2 UU61W U32 No of connectable indoor units 1 4 Total capacity index of connectable indoor units kW 12 5 14 0 15 0 Power supply 3Ø 380 415V 50Hz Chassis ...

Page 11: ...umber Function A Basic C L Plasma E Elevation grille Look L Basic Chassis name only for Low Static Duct Chassis name Electrical rating G 220 240 50 60 1 Nominal Capacity Ex 9 000 Btu h Class 09 18 000 Btu h Class 18 Model type C C O H H P Q DC Inverter C O W DC Inverter H P A N U N Indoor units using R410A Indicates Product type T Ceiling Cassette Air Conditioner B Ceiling Concealed Duct Air Condi...

Page 12: ...mber Electric standard Phase Volts Freq 6 220 240 50 1 8 380 415 50 3 G 220 240 50 60 1 L 380 415 50 60 3 Indicates that this is a R410A outdoor unit Model type C C O H H P Q DC Inverter C O W DC Inverter H P Nominal cooling capacity in kBtu h 18 24 30 36 42 48 60 18kBtu h 24kBtu h 30kBtu h 36kBtu h 42kBtu h 48kBtu h 60kBtu h Part 1 General Information 3 3 Outdoor Unit Global ...

Page 13: ...t Outdoor Units N Indoor Unit U Outdoor Unit L Low Static Duct Nominal Capacity Ex 9 000 Btu h Class 09 18 000 Btu h Class 18 Product type T Ceiling Cassette Air Conditioner B Ceiling Concealed Duct Air Conditioner V Ceiling Floor Air Conditioner J Single Split Wall Mounted Air Conditioner P Floor Standing Air Conditioner Q Console Air Conditioner Connectable Outdoor unit type U Indoor units only ...

Page 14: ...ly for training and service purposes LGE Internal Use Only Part 1 General Information 3 6 Outdoor Unit Europe U U 2 4 W U4 2 Cooling capacity kBtu h Type U Outdoor units Model type U Universal model Model type Serial number Outdoor unit chassis name W Inverter ...

Page 15: ...Functions 30 4 1 E S P External Static Pressure Setting 30 4 2 High Ceiling operation 40 5 Reliability 41 5 1 Hot start 41 5 2 Self diagnosis Function 41 5 3 Soft dry operation 41 6 Convenience Functions Controls 42 6 1 Cooling heating Operations 42 6 2 Auto cleaning operation 43 6 3 Auto changeover operation 43 6 4 Auto restart Opeartion 43 6 5 Child Lock Function 44 6 6 Forced operation 44 6 7 G...

Page 16: ... heater X High ceiling operation O Auto Elevation Grille X Reliability Hot start O Self diagnosis O Soft dry operation O Convenience Auto changeover O Auto cleaning X Auto operation artificial intelligence O Auto Restart O Child lock O Forced operation O Group control O Sleep mode O Timer on off O Timer weekly O Two thermistor control O Individual control Wired remote controller O Deluxe wired rem...

Page 17: ...eater X High ceiling operation O Auto Elevation Grille PTEGM0 Reliability Hot start O Self diagnosis O Soft dry operation O Convenience Auto changeover O Auto cleaning X Auto operation artificial intelligence O Auto Restart O Child lock O Forced operation O Group control O Sleep mode O Timer on off O Timer weekly O Two thermistor control O Individual control Wired remote controller O Deluxe wired ...

Page 18: ... Installation Drain pump ABDPG E S P control O Electric heater X High ceiling operation X Auto Elevation Grille X Reliability Hot start O Self diagnosis O Soft dry operation O Convenience Auto changeover O Auto cleaning X Auto operation artificial intelligence O Auto Restart O Child lock O Forced operation X Group control O Sleep mode X Timer on off O Timer weekly O Two thermistor control O Indivi...

Page 19: ...orced operation X Group control O Sleep mode X Timer on off O Timer weekly O Two thermistor control O Individual control Standard Wired remote controller O Deluxe wired remote controller X Simple wired remote controller X Simple Wired remote controller for hotel use X Wireless remote controller PQWRHQ0FDB Network function General central controller Non LGAP X Network Solution LGAP O Dry contact PQ...

Page 20: ...mp X X E S P control X X Electric heater X X High ceiling operation X O Auto Elevation Grille X X Reliability Hot start O O Self diagnosis O O Soft dry operation O O Convenience Auto changeover O O Auto cleaning X X Auto operation artificial intelligence O O Auto Restart O O Child lock O O Forced operation O O Group control O O Sleep mode O O Timer on off O O Timer weekly O O Two thermistor contro...

Page 21: ...asma air purifier X Allergy Safe filter X Long life prefilter washable anti fungus O Installation Drain pump X E S P control X Electric heater X High ceiling operation X Auto Elevation Grille X Reliability Hot start O Self diagnosis O Soft dry operation O Convenience Auto changeover O Auto cleaning O Auto operation artificial intelligence X Auto restart O Child lock O Forced operation O Group cont...

Page 22: ...imple Controller Function controller Function Scheduler AC Ez AC Smart ll Option Kit SD card type ACP Advanced Control Platform AC Manager PI485 DO Digital Output Kit BNU Building Network Unit LONWORKS Gateway BACnet Gateway Installation Y branch Header branch Air Guide ODU Dry Contact Low Ambient Kit Note O Applied X Not applied Accessory model name Installed at field ordered and purchased separa...

Page 23: ...put Kit BNU Building Network Unit LONWORKS Gateway BACnet Gateway Installation Y branch Header branch Air Guide ODU Dry Contact Low Ambient Kit Note O Applied X Not applied Accessory model name Installed at field ordered and purchased separately by the corresponding model name supplied with separate package PQCSB101S0 PQCSB101S0 PQCSB101S0 PQCSB101S0 PQCSC101S0 PQCSB101S0 PQCSC101S0 PQCSB101S0 PQC...

Page 24: ...lding Network Unit LONWORKS Gateway BACnet Gateway Installation Y branch Header branch Air Guide ODU Dry Contact Low Ambient Kit Note O Applied X Not applied Accessory model name Installed at field ordered and purchased separately by the corresponding model name supplied with separate package PQCSB101S0 PQCSB101S0 PQCSB101S0 PQCSB101S0 PQCSC101S0 PQCSB101S0 PQCSC101S0 PQCSB101S0 PQCSC101S0 PQCSB10...

Page 25: ...type ACP Advanced Control Platform AC Manager PI485 DO Digital Output Kit BNU Building Network Unit LONWORKS Gateway BACnet Gateway Installation Y branch Header branch Air Guide ODU Dry Contact Low Ambient Kit PQCSB101S0 PQCSB101S0 PQCSB101S0 PQCSC101S0 PQCSB101S0 PQCSC101S0 PQCSB101S0 PQCSD130A0 PQCSB101S0 PQCSD130A0 PQCSZ250S0 PQCSZ250S0 PQCSW320A1E PQCSW320A1E PQCSE341A0 PQCSE342A0 PQCSE341A0 P...

Page 26: ...type ACP Advanced Control Platform AC Manager PI485 DO Digital Output Kit BNU Building Network Unit LONWORKS Gateway BACnet Gateway Installation Y branch Header branch Air Guide ODU Dry Contact Low Ambient Kit Note O Applied X Not applied Accessory model name Installed at field ordered and purchased separately by the corresponding model name supplied with separate package PQCSB101S0 PQCSB101S0 PQC...

Page 27: ... input the left right louver automatically operates with the auto swing or it is fixed to the desired direction 2 2 Auto swing up down By the auto swing key input the upper lower vane automatically operates with the auto swing or it is fixed to the desired direction 2 3 Chaos swing up down By the Chaos swing key input the upper lower vane automatically operates with the chaos swing or it is fixed ...

Page 28: ...at ed In the Jet Cool mode the indoor fan is operated at super high speed for 30 min at cooling mode operation In the Jet Cool mode operation the room temperature is controlled to the setting temperature 18 C When the sleep timer mode is input while in the Jet Cool mode operation the Jet Cool mode has the priority When the Jet Cool key is input the upper lower vanes are reset to those of the initi...

Page 29: ...oscopic contaminants and dust but also removes house mites pollen and pet fur to help prevent allergic diseases like asthma This filter that can be used over and over again by simply washing with water 3 Air purifying Ionizer Photo Catalyst Coated Mesh Dust particles Odour Dust electrode discharge Odour molecule Generating plasma Polluted Air Purified fresh Air 4 8KV discharge Part 2 Functions Con...

Page 30: ...save 4 5 Pressing button will exit settings mode After setup it automatically gets out of setup mode if there is no button input for 25 seconds When exiting without pressing set button the manipulated value is not reflected If pressing button repeatedly it moves to static pressure selection menu as picture below 2 This function is applied to only duct type Setting this in other cases will cause ma...

Page 31: ...tep Function code ESP code ESP value Press button to save 7 Select ESP fan step again by using button and setup ESP value as No 4 and 5 that corresponds each wind flow 6 Press button to exit After setup it automatically gets out of setup mode if there is no button input for 25 seconds When exiting without pressing set button the manipulated value is not reflected 8 If you set ESP incorrectly the a...

Page 32: ...ting value with the temperature up s down t button 2 When pressing button currently established static pressure value will be set up 3 When pressing the button and button simultaneously for more than 3 seconds after the setting has been completed the setting mode will be released If there isn t any button input for more than 25 seconds the installer setting mode will also be released 4 OPER MODE O...

Page 33: ...120 17 8 15 3 12 7 125 16 5 14 0 130 17 8 15 3 12 6 135 16 5 13 5 140 17 5 14 5 145 16 5 Setting Value Static Pressure mmAq Pa 2 5 25 4 39 6 59 8 78 105 13 9 110 15 2 12 7 115 16 5 14 0 120 17 8 15 3 12 7 125 16 5 14 0 130 17 8 15 3 12 6 135 16 5 13 5 140 17 6 14 5 145 16 5 150 18 0 Unit CMM Unit CMM ABNH30GGLA2 Setting Value Static Pressure mmAq Pa 4 49 6 59 8 78 10 98 100 20 8 105 23 2 19 5 110 ...

Page 34: ...A2 Setting Value Static Pressure mmAq Pa 6 59 8 78 10 98 12 118 85 31 5 90 36 3 29 8 95 41 3 34 5 28 4 100 45 4 39 7 33 5 27 3 105 44 1 38 6 33 1 110 44 2 38 9 115 44 7 Unit CMM ABNH42GRLA2 Setting Value Static Pressure mmAq Pa 6 59 8 78 10 98 12 118 85 31 5 90 36 3 29 8 95 41 3 34 5 28 4 100 45 4 39 7 33 5 27 3 105 44 1 38 6 33 1 110 44 2 38 9 115 44 7 Unit CMM ABNH60GRLA2 Setting Value Static Pr...

Page 35: ...5 49 6 59 7 69 8 78 9 88 10 98 11 108 12 118 13 127 15 147 Setting Value 32 01 32 02 32 03 32 04 32 05 32 06 32 07 32 08 32 09 32 10 32 11 ABNW36GM2A0 LOW 24 88 91 95 100 101 108 113 115 118 118 118 MID 28 93 97 101 105 108 115 118 120 124 124 124 HIGH 32 101 105 109 112 115 119 123 126 128 128 128 Model Step CMM Static Pressure mmAq Pa 5 49 6 59 7 69 8 78 9 88 10 98 11 108 12 118 13 127 14 137 15...

Page 36: ...5 25 8 78 Mid 140 14 5 Low 134 13 0 ABNH24GHLA2 High factory set Hl 150 8 78 18 0 2 5 25 8 78 Mid 145 16 5 Low 136 14 0 ABNH30GGLA2 High factory set Hl 137 10 98 26 5 2 5 25 10 98 Mid 131 23 0 Low 126 20 0 ABNH36GGLA2 High factory set Hl 152 10 98 32 0 4 39 10 98 Mid 146 29 0 Low 141 26 5 ABNH42GRLA2 High factory set Hl 106 10 98 38 0 5 49 12 118 Mid 102 36 0 Low 99 32 0 ABNH48GRLA2 High factory s...

Page 37: ...6 69 90 9 07 8 43 7 56 6 47 95 9 96 9 32 8 45 7 36 100 10 87 10 22 9 36 8 27 6 96 105 11 79 11 15 10 28 9 19 7 89 6 35 110 12 73 12 09 11 22 10 14 8 83 7 30 115 13 69 13 05 12 18 11 09 9 78 8 25 120 14 67 14 02 13 16 12 07 10 76 9 23 125 15 66 15 01 14 15 13 06 11 75 10 22 130 16 67 16 02 15 16 14 07 12 76 11 23 135 16 18 15 10 13 79 12 26 140 16 14 14 83 13 30 145 15 89 14 36 Unit CMM Unit CMM Un...

Page 38: ... 17 9 15 1 12 2 120 22 6 19 7 17 1 14 3 11 3 125 21 5 19 1 16 5 13 6 11 9 130 23 3 21 2 18 7 15 8 14 3 135 23 2 20 8 18 0 16 7 140 23 0 20 3 19 1 145 22 5 21 5 150 23 8 Setting value Static Pressure mmAq Pa 2 5 25 4 39 6 59 8 78 10 98 12 118 14 137 15 147 85 16 8 14 6 90 18 1 15 9 95 19 4 17 2 15 0 100 20 7 18 5 16 3 13 9 105 22 0 19 8 17 7 15 3 13 0 110 23 3 21 1 19 1 16 8 14 6 115 24 6 22 4 20 5...

Page 39: ...32 2 27 5 130 44 1 40 8 36 1 31 6 26 1 135 44 3 40 0 35 6 30 4 28 0 140 43 9 39 7 34 6 32 4 145 43 7 38 9 36 8 150 43 1 41 2 155 45 6 Setting value Static Pressure mmAq Pa 4 39 6 59 8 78 10 98 12 118 14 137 15 147 85 24 9 90 27 6 22 7 95 30 4 25 7 20 7 100 33 1 28 7 24 0 105 35 9 31 7 27 3 20 8 110 38 6 34 7 30 5 24 3 20 6 115 37 8 33 8 27 9 23 8 120 37 1 31 4 27 0 22 4 20 5 125 35 0 30 1 25 7 23 ...

Page 40: ...button will exit settings mode After setup it automatically gets out of setup mode if there is no button input for 25 seconds When exiting without pressing set button the manipulated value is not reflected This function is to adjust FAN Airflow rate according to ceiling height For ceiling type product Ceiling height setting is available only for some products Ceiling height of ʻVery highʼ function...

Page 41: ...ooting guide 5 3 Soft dry operation When the dehumidification operation input by the remote control is received the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature While compressor off the indoor fan repeats low airflow speed and stop While the intake air temp is between compressor on temp and compressor off temp 10 min dehumidif...

Page 42: ...tion The difference between the room temp and set temp frequency restrictions If compressor operates at some frequency the operating frequency of compressor cannot be changed within 30 sec onds Condition of compressor turned off When intake air temperature reaches 4 C above the setting temperature Condition of compressor turned on When intake air temperature reaches 2 C above the setting temperatu...

Page 43: ...or Used after the Cooling Operation before turning the unit off clean the Evaporator and keep it dry for the next opera tion The function is easy to operate as it is accessed through the Remote controller Unit Operation ON OFF Comp Indoor Fan ON OFF ON OFF Setting step OFF L Low Setting step Cooling Only 6 3 Auto changeover operation The air conditioner changes the operation mode automatically to ...

Page 44: ...n is pressed If you want to stop operation re press the button Indoor temp over 24 C 21 24 C below 21 C Setting temp 22 C 23 C 24 C Setting speed of indoor fan High speed Operating Mode Cooling Healthy Dehumidification Heating It is the function to use preventing children or others from careless using Press button repeatedly until the is flashing 1 If moving to setup icon area by using button setu...

Page 45: ...mote controller you must change the master slave setting from the indoor unit Indoor units the master slave configuration of the product after completion of indoor unit power ʻOFFʼ and then ʻONʼ the power after 1 minutes elapsed sign up For ceiling type cassette and duct product group change the switch setting of the indoor PCB For wall mount type and stand type product change the master slave set...

Page 46: ...er mode is input while in heating cycle mode the airflow speed of the indoor fan is set to the medi um 6 9 Timer On Off 6 9 1 On Timer Operation When the set time is reached after the time is input by the remote control the appliance starts to operate The timer LED is on when the on timer is input It is off when the time set by the timer is reached If the appliance is operating at the time set by ...

Page 47: ...ton You can setup two reservations weekly reservation 1 and weekly reservation 2 for a day 3 Please move to date setup part by using button If date indication blinks please setup date You can setup date from Monday to Sunday 4 Please move to AM PM setup part of turning on by using button 5 Please move to hour setup part of turning on by using button It is the part to setup the time at which air co...

Page 48: ...eekly reservation setup for the day that you set is finished 12 If you setup with the method identical with above by selecting the day that you d like to setup it operates weekly reservation If you setup both turning on reservation time and turning off reservation time identically it doesn t operate reservation drive 13 Weekly reservation explanation Turning on time Under bar the indication that t...

Page 49: ...er setup it automatically gets out of setup mode if there is no button input for 25 seconds When exiting without pressing set button the manipulated value is not reflected h The function of 2TH has different operation characteristics according to the product Thermistor Table This is the function to select the temperature sensor to judge the room temperature Temperature sensor selection Function 01...

Page 50: ...space environment 7 3 Auto Elevation Grille Auto Elevation Grille is automatically down to height of max 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 7 1 Low Ambient control This Function is for cooling operating in outdoor low temperature If outdoor temperature drops below certain temperature liquid back is pre...

Page 51: ...front panel Do not drop it down or into water Or else there is worry about trouble failure Do not press hard the Remote Controller button with nail ball point pen or other sharp substance Or else there is worry about trouble failure In case when obstacle such as curtain hides the signal reception part of receiver in between the space interval Remote Controller operation is infeasible Lift grill fr...

Page 52: ...ss the up button Then suction grill goes up and enters into the front panel 1 Stop the Air Conditioner Operation 2 Descend the Suction Grill 3 Raise the Suction Grill Depress the stop button Make use of this when you want to stop it at your wished posi tion 4 Stop the Suction Grill during Rising Always stop the air conditioner operation for safety before operating lift grill Take heed _ there is w...

Page 53: ... Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Part 3 Basic Control 3 Basic Control 1 Normal operation 54 2 Compressor control 54 3 EEV Electronic Expansion Valve control 54 ...

Page 54: ...ng mode by fuzzy control to ensure the stable system performance 2 Compressor control Cooling and heating load System capacity Linear control Inverter linear control as cooling and heating load increasing Actuator Cooling operation Heating operation Stop state Compressor Fuzzy control Fuzzy control Stop Fan Fuzzy control Fuzzy control Stop EEV Super heating fuzzy control Discharge Temp Control Min...

Page 55: ...ror Indicator Outdoor 57 2 Pump Down 58 3 Evacuation 59 4 Gas Charging 60 5 Cycle Part 61 6 Electronic Parts 62 6 1 The Product does n t operate at all 62 6 2 The Product doesn t operate with the remote controller 63 6 3 The Compressor Outdoor Fan are don t operate 64 6 4 When indoor Fan does not operate 65 6 5 When the louver does not operate 66 6 6 Troubleshooting Indoor Error 67 6 7 Troubleshoo...

Page 56: ...of error code be sure to turn off the power and then turn on Having or not of error code is different from Model Indoor Error Code Title Cause of Error 1 Air temperature sensor of Indoor unit Air temperature sensor of indoor unit is open or short 2 Inlet pipe temperature Sensor of indoor unit Inlet pipe temperature sensor of indoor unit is open or short 3 Communication error wired remote controlle...

Page 57: ...hing 5 times 1 time Within 1h 67 Outdoor BLDC Fan Lock Error Stop CH67 Flashing 6 times Flashing 7 times 10 time Within 1h 73 PSC PFC Over Current Error SW Stop CH73 Flashing 7 times Flashing 3 times 10 time Within 1h Code Contents Operation State Error Display Count Cable Remote Controller Outdoor Device Red LED Green LED 21 IPM Fault Error Stop CH21 Flashing 2 times Flashing 1 time 10 time Withi...

Page 58: ... 7 minutes from the start of the machine Then close the gas valve after Green LED on WARNING When the green LED of PCB is on compressor is going to be off because of low pressure You should return the Dip Switch to operate normally after finishing the operation Improper Pump down will lead to product turn off along with LED green red off with in 20 min utes from the initial start 6 Pump Down Dip S...

Page 59: ...ge needle does not move approxima tely 5 minutes after turning off the vacuum pump 4 Disconnect the charge hose from the vacuum pump Vacuum pump oil If the vacuum pump oil becomes dirty or depleted replenish as needed WARNING Use a vacuum pump or lnert nitrogen gas when doing leakage test or air purge Do not compress air or Oxygen and do not use Flammable gases Otherwise it may cause fire or explo...

Page 60: ... a little at a time approximately 150g each time while operating the air conditioner in the cooling cycle however one time is not suffi cient wait approximately 1 minute and then repeat the procedure pumping down pin 4 Immediately disconnect the charge hose from the 3 way valveʼs service port Stopping partway will allow the gas to be discharged If the system has been charged with liquid refrig era...

Page 61: ...ce between intake and discharge air depends on room air humidity When the room air humidity is relativery higher temperature difference is smaller When the room air humidity is relatively lower temperature difference is larger 2 Check temperature and pressure of refrigeration cycle in cooling mode 1 The suction pressure is usually 8 5 9 5kg cm2 G Cooling at normal condition R410A 2 The temperature...

Page 62: ...edy 1 Check the power outlet 2 Replace PCB Assembly 4 Replace PCB Assembly 5 Replace PCB Assembly Turn on the main power again Turn off the main power and wait for 10 seconds Yes No A Beeping sound is made from the indoor unit Check the voltage of power supply AC220V AC240V 50Hz and check for the following The voltage of main power supply The voltage applied to the unit The connecting method of In...

Page 63: ...s made from the indoor unit Refer to 10 1 Check the voltage of power AC220V AC240V 50Hz Is it possible to turn on the unit by ON OFF button on display Yes No Is the remote controller working properly Yes When the mark is displayed in LCD screen replace battery No Check the contact point of CN DISP 1 2 connector Re connector Check display PCB Assembly Voltage between CN DISP1 should be DC 5V If pro...

Page 64: ...n bad connection or are not engaged Compressor Outdoor fan is stopped Check the related circuit of R02H 12 1K R01H 1K R04H 6 2K R03H 1K C01H 102 C02H 102 Micom pin No Check the Indoor temperature sensor is disconnected or not about 10K at 25 C Check the Relay RY PWR RY START for driving Compressor Check the voltage between brown and blue cable of terminal to connect the Outdoor About AC220V 240V C...

Page 65: ...n power Check the connection of CN FAN Check the Fan Motor Check the Fuse AC250V T2A Turn on the main power Check the related circuit of indoor Fan Motor The pin No 38 of micom and the part for driving SSR Q01M Check the related pattern Check the SSR SSR Open Indoor Fan Motor never operate SSR short Indoor Fan Motor always operates in case of ON or OFF The voltage of Pin No 1 orange and 3 black of...

Page 66: ...nnector Check the soldering condition on PCB of CN U D or CN0L R Connector Check the operating circuit of the vertical louver Confirm that there is DC 12V between pin of CN U D CN0L R and GND Confirm that there is a soldering short at following terminals Between 1 2 3 and 4 of MICOM Between 17 18 19 and 20 of MICOM Between 4 5 6 and 7 of IC01M Between 5 6 7 and 8 of IC01M 6 5 When the louver does ...

Page 67: ...argin Normal Air temp sensor 10 C 20 7kΩ 25 C 10kΩ 50 C 3 4kΩ Pipe temp sensor 10 C 10kΩ 25 C 5kΩ 50 C 1 8kΩ Is sensor properly connected to PCB Is the resistance value of sensor normal Connect properly to PCB Change the sensor Change the PCB Yes Yes No No CN ROOM Indoor air temp sensor CN PIPE IN Pipe inlet temp sensor CN PIPE OUT Pipe outlet temp sensor Measure the resistance of outlet pipe temp...

Page 68: ...e error happens again if the remote controller is replaced Does the error occurred when the cable of remote controller is replaced Replace cabled remote controller Check connection communication cable Replace indoor unit PCB Yes Yes No No If there is no remote controller to replace Use another unitʼs remote controller doing well Check cable Contact failure of connected portion or extension of cabl...

Page 69: ...evel of float switch Is drain pump working Sound drain noise contact etc Replace float switch Replace Indoor PCB or reconnect the connector Yes Yes No No Is Float switch short On measuring its resistance No Yes Drain pump blocked by foreign particles Yes No In indoor unit PCB Does the terminal voltage for drain pump has 220V output Replace indoor unit PCB Replace Drain Pump Yes Check the drain hea...

Page 70: ...l right reserved Only for training and service purposes LGE Internal Use Only Indoor PCB drain pump connector Check input of 220V Marked as CN DPUMP float A Point to check rotating Float switch Housing CN FLOAT Standard of drain pipe head height slope MAX 450 ...

Page 71: ...U 130 FSSPS SSPS PDDVS JO 130 PG UIF OEPPS 1 SSPS EFWFMPQFE JO DPNNVOJDBUJPO CFUXFFO UIF NJDSP QSPDFTTPS BOE UIF 130 PO UIF TVSGBDF PG UIF 1 3303 EVF UP UIF 130 EBNBHF SSPS EJBHOPTJT BOE DPVOUFSNFBTVSF GMPX DIBSU 3FQMBDF UIF JOEPPS VOJU 1 BOE UIFO NBLF TVSF UP QFSGPSN VUP BEESFTTJOH BOE JOQVU UIF BEESFTT PG DFOUSBM DPOUSPM 6 6 Troubleshooting Indoor Error CH 09 Indoor unit EEPROM error ...

Page 72: ...or normal Replace indoor unit fan motor It is normal when check hall sensor of indoor fan motor as shown below Yes No k Replace indoor unit PCB Checking connection state of fan motor connector 1 4 5 6 7 1 5 6 7 4 4 4 4 Each termainl with the tester Tester TH chassis hundreds kΩ hundreds kΩ hundreds kΩ hundreds kΩ TD chassis Normal resistance 10 Replace the indoor unit PCB and then make sure to do ...

Page 73: ...oor fan fault EEV Electric Expansion Valve fault fault of a temperature sensor or its con nection blocking of an indoor device filter and bending blocking of a pipe Compressor Open Short of the coil in the compressor insulation breaking between the coil in the compressor and the pipe or panel damage of compressor with abrasion and compressor connection fault PCB As sembly IPM part fault fault sign...

Page 74: ...ing sensor fault Checking Compressor phase resistance Checking single unit of IPM Checking pipes For bending blocking Checking 4 way valve Checking compressor Insulation resistance Checking Compressor current detection circuit Checking EEV for motion Checking DC link voltage Ⲽ 4JOHMF QPXFS TPVSDF IFDLJOH XIFUIFS UIF QPXFS JT _ 7 QIBTF QPXFS TPVSDF IFDL XIFUIFS UIF MJOF WPMUBHF JT _ 7 Ⲽ 3FGFS UP QB...

Page 75: ...ng of the lateral suction point on the wall of the outdoor devices Foreign substances in the heat exchanger and obstacles in the surrounding Frequent turning off of the compressor Elevation of the pipe temperature due to reduced wind velocity Wrong influence to the system in over load state Corrosion Possible infiltration of moisture highly humid area Corrosion of heat exchanger Reduced opera tion...

Page 76: ...gerant Frequent turning on off of the compressor by the high low pressure protection logic Accumulated refrigerant elevates the tem perature and reduces the pressure Wrong oil collection elevates the outlet tem perature of the compressor and damages the compressor Bending Blocking of a pipe Checking SVC Valve Bending of a pipe OPEN Check pipes SVC Valve Check EEV Check Replacing a part of or the e...

Page 77: ...FBTVSF UIF SFTJTUBODF CFUXFFO UIF UFSNJOBMT ⲳ ⱕⲴ NFBOT UIF TIPSU PG DPNQSFTTPS QIBTF 3FQMBDF UIF DPNQSFTTPS 3FGFS UP UIF DPNQSFTTPS SFTJTUBODF TUBOEBSET G BOZ EJTPSEFS JT GPVOE NFBTVSF UIF MJOF SFTJTUBODF CFUXFFO UIF UFSNJOBMT PG UIF DPNQSFTTPS BT TIPXO CFMPX G UIF DPNQSFTTPS JT GPVOE UP CF OPSNBM BOZ DPNQSFTTPS DPOOFDUJPO XJSF NBZ IBWF B GBVMU Terminal Insulation Resistance U panel ŧ 10MѤ V panel...

Page 78: ...G JOTVMBUJPO SFTJTUBODF CFUXFFO UIF DPNQSFTTPS BOE QBOFM FBTVSFNFOU PG QIBTF SFTJTUBODF 8JSJOH IFDL How to check the compressor wiring error IFDL XIFUIFS UIF 1 XJSFT BOE DPNQSFTTPS XJSFT BSF DPOOFDUFE JO UIF TBNF DPMPST FMMPX MVF 3 3FE 3 3 1JDUVSF PG OPSNBM DPNQSFTTPS XJSJOH IFDL XIFUIFS UIF DPNQSFTTPS XJSFT BSF QSPQFSMZ DPOOFDUFE XJUI 6 7 BOE 8 Ⲽ 5IF XJSJOH EJSFDUJPO JT 8 DPVOUFS DMPDL XJTF V Blu...

Page 79: ...MUJ 5FTUFS BT JPEF 7PMUBHF FBTVSFNFOU PEF FBTVSF UIF WPMUBHFT PG 1_6 1_7 1_8 BT TIPXO JO JH FBTVSF UIF WPMUBHFT PG 6_ V 7_ W 8_ X BT TIPXO JO JH G UIF NFBTVSFNFOUT BSF TJHOJGJDBOUMZ EJGGFSFOU GSPN UIF MFWFMT TIPXO JO UIF GJHVSFT UIF 1 JT EFFNFE UP CF EBNBHFE Sequence of Measurement Measurement Normal Standards 1 P U 0 4V 0 6V 2 P V 0 4V 0 6V 3 P W 0 4V 0 6V Sequence of Measurement Measurement Norm...

Page 80: ...MU PG 1 BTTFNCMZ UFNT GPS DIFDLJOH VEHNFOU PG EBNBHF PG 5 IFDLJOH UIF TPMEFSJOH TUBUF IPM Check Point 1 1JO SSBOHFNFOU BOE 1JO VNCFST Step Flow of Inspection 1 Turn the power off wait until the outdoor device LED is turned off 2 Remove compressor wires 3 Measure the voltage as shown in the figure 4 Check the voltage for being in the range of 0 4 0 6V 5 Judge IPM Pins for short P U V W N u N v N w ...

Page 81: ... Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ IPM Check Point 4kW 5kW 1 1JO SSBOHFNFOU BOE 1JO VNCFST 1 1JO SSBOHFNFOU BOE 1JO VNCFST P W V U N w N v N u P W V U N w N v N u ...

Page 82: ... Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ IPM Check Point 6kW 7kW 1 1JO SSBOHFNFOU BOE 1JO VNCFST 1 1JO SSBOHFNFOU BOE 1JO VNCFST P W V U N w N v N u P W V U N w N v N u ...

Page 83: ...U JT 7Ⰽ 7 G UIF NFBTVSFNFOU JT EJGGFSFOU GSPN UIF TUBOEBSE SFQMBDF 1 BVUJPO 8IFO UIF NFBTVSFNFOU JT NBEF JO UIF TUBUF UIBU UIF FMFDUSJDJUZ JT BQQMJFE DIFDL UIF UFTUFS GPS CFJOH JO UIF NFBTVSFNFOU NPEF BOE CF DBSFGVM UP BWPJE QPTTJCMF TIPSU PG UIF QBSUT PUIFS UIBO UIF NFBTVSJOH QBSU Apply the electricity Turn indoor devices off Measure voltage Replace PCBA Current detection part is normal IFDLJOH N...

Page 84: ...ctronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ Compressor Phase Current Detection 2 2 5kW 4kW Current Detection Circuit Check Point GND Comp Current Comp U GND ...

Page 85: ... 85 Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ Compressor Phase Current Detection 5kW 6kW GND V V W W U U GND ...

Page 86: ... 86 Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ Compressor Phase Current Detection 7kW GND V V W W U U ...

Page 87: ...VME CF NBEF BU UIF UJNF UP TUBSU IFBUJOH NPEF PQFSBUJPO BOE BU UIF UJNF PG TUBOECZ BGUFS PQFSBUJPO Checking the output voltage of CN 4way refer to next page Check the 4 way valve coil resistance 4FU UIF UFTUFS JO 7PMUBHF PEF BOE DIFDL UIF DVSSFOU IFDL UIF PVUQVU WPMUBHF CFUXFFO CPUI FOET PG 8BZ POOFDUPS 5IF TUBOEBSE PG OPSNBM WPMUBHF JT 7Ⰽ G UIF NFBTVSFNFOU JT EJGGFSFOU GSPN UIF TUBOEBSE SFQMBDF 1...

Page 88: ... 88 Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ 4Way Check 2 2 5kW 4kW 4 Way Check Point CN 4Way CN 4Way ...

Page 89: ... 89 Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ Compressor Phase Current Detection 5kW 6kW CN 4Way CN 4Way ...

Page 90: ... 90 Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ Compressor Phase Current Detection 7kW CN 4Way BJO 1 ...

Page 91: ... 91 Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting LGMV Display 8IFO FBUJOH UVSO PO 8IFO PPMJOH UVSO PGG ...

Page 92: ...F DVSSFOU FBTVSF UIF SFTJTUBODF CFUXFFO FUI 1JOT PG 7 POOFDUPS PS UIF NFBTVSFNFOU NFUIPE BOE OPSNBM TUBOEBSE SFGFS UP UIF 5BCMF Ⲽ 5IFSF NBZ CF UIF EJGGFSFODF JO UIF SFTJTUBODF EFQFOEJOH VQPO UIF 7 4QFDJGJDBUJPOT RD 1 2 BL 3 OR 4 YL 5 WH 6 Pin No RD 1 BR 2 BL 3 OR 4 YL 5 WH 6 Pin No Measurement Pin Normal Standard 1 3 45Ѥ 5Ѥ 1 4 45Ѥ 5Ѥ 1 5 45Ѥ 5Ѥ 1 6 45Ѥ 5Ѥ Measurement Pin Normal Standard 1 4 45Ѥ 5...

Page 93: ...BOEBSE PG OPSNBM WPMUBHF NFBTVSFNFOU JT _ 7 G UIF NFBTVSFNFOU JT EJGGFSFOU GSPN UIF TUBOEBSE SFQMBDF 1 BVUJPO 8IFO UIF NFBTVSFNFOU JT NBEF JO UIF TUBUF UIBU UIF FMFDUSJDJUZ JT BQQMJFE DIFDL UIF UFTUFS GPS CFJOH JO UIF NFBTVSFNFOU NPEF BOE CF DBSFGVM UP BWPJE QPTTJCMF TIPSU PG UIF QBSUT PUIFS UIBO UIF NFBTVSJOH QBSU Apply the electricity Turn indoor devices off Measure voltage Replace PCBA Current ...

Page 94: ...tronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ DC Link Detection Circuit Check Point 2 2 5kW 4kW DC Link Detection Circuit Check Point GND DC_ Link DC_ Link GND ...

Page 95: ...Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ DC Link Detection Circuit Check Point 5kW 6kW GND DC_LINK DC_LINK GND ...

Page 96: ... Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ DC Link Detection Circuit Check Point 7kW GND DC LINK Voltage _ INV ...

Page 97: ... 97 Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting JOL 7PMUBHF MFWFM Controller Voltage 2 6kW 140V 7kW 380V ...

Page 98: ... Expected Causes Installation Overload Installation fault closing of SVC valve under over charging with refriger ant infiltration of water into refrigerant outdoor device shielding outdoor fan fault EEV valve fault and sensor fault or assembling error Compressor Short between compressor coil and sash abrasion of compressor and short opening of compressor coil PCB Assembly Input current detection c...

Page 99: ...king refrigerant for over shorts Checking compressor wiring Checking input current detection circuit Checking power connection state Checking outdoor fan operation Checking compressor phase resis tance Checking pipes for Bending blocking Checking compressor insulation resistance Checking EEV for motion Ⲽ IFDL GPS _ 7 Ⲽ 3FGFS UP QBHF Ⲽ IFDL UIF NBOJGPME HBVHF QSFTTVSF Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QBH...

Page 100: ...BSE PG OPSNBM WPMUBHF NFBTVSFNFOU JT 7Ⰽ 7 G UIF NFBTVSFNFOU JT EJGGFSFOU GSPN UIF TUBOEBSE SFQMBDF 1 BVUJPO 8IFO UIF NFBTVSFNFOU JT NBEF JO UIF TUBUF UIBU UIF FMFDUSJDJUZ JT BQQMJFE DIFDL UIF UFTUFS GPS CFJOH JO UIF NFBTVSFNFOU NPEF BOE CF DBSFGVM UP BWPJE QPTTJCMF TIPSU PG UIF QBSUT PUIFS UIBO UIF NFBTVSJOH QBSU Apply the electricity Turn indoor devices off Measure voltage Replace PCBA Current de...

Page 101: ...101 Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ Input Current Detection Point 2 2 5kW 4kW GND Input_I I_CT GND ...

Page 102: ... 102 Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ Input Current Detection Point 5kW 6kW GND CT_INV INPUT CT GND ...

Page 103: ...Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ Input Current Detection Point 7kW GND DC LINK Voltage _ INV GND Input_Current_T_PFC Input_Current_R_PFC 4kW ...

Page 104: ... LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting LGMV Display FSSPS DPOEJUJPO Controller Current Level 2kW 9A 2 5kW 11A 4kW 19A 5kW 29A 6kW 29A 7kW 13A ...

Page 105: ...me against the generation of over current at the compressor part in the DC Link Low Voltage condition Condition for Generation Detected DC Link Voltage is less than the standard Expected Causes Installation Installation fault and input of low voltage power PCB Assembly Damage of DC link voltage detection circuit and reactor terminal connection error 6 7 Troubleshooting Outdoor Error CH 23 DC Link ...

Page 106: ...ng input voltage Checking the wire coating of power source Checking compressor wiring Checking power connection state Checking compressor phase resis tance Checking Bridge Diode Limited to Multi V Model only Ⲽ IFDL GPS _ 7 Ⲽ 3FGFS UP QBHF Ⲽ IFDL UIF XJSF GPS QPTTJCMF DPBU DIPQQJOH BOE TIPSU Ⲽ IFDL UIF SFBDUPS UFSNJOBM JOTFSUJPO TUBUF Ⲽ 3FGFS UP QBHF MPX PG USPVCMF EJBHOPTJT 6 7 Troubleshooting Out...

Page 107: ...ng Ǎᇥ Reactor Connector Point 2 2 5kW 4kW 5kW 6kW 7kW SPXO 8JSF JT DPOOFDUFE 5FSNJOBM MVF 8JSF JT DPOOFDUFE 5FSNJOBM SPXO 8JSF JT DPOOFDUFE 5FSNJOBM MVF 8JSF JT DPOOFDUFE 5FSNJOBM SPXO 8JSF JT DPOOFDUFE 3 5FSNJOBM MBDL 8JSF JT DPOOFDUFE 4 5FSNJOBM 3 4 IFDLJOH 3FBDUPS POOFDUJPO 6 7 Troubleshooting Outdoor Error CH 23 DC Link Voltage Low ...

Page 108: ...FU UIF VMUJ 5FTUFS BT JPEF 7PMUBHF FBTVSFNFOU PEF FBTVSF UIF WPMUBHF BT TIPXO JO JH FBTVSF UIF WPMUBHF BT TIPXO JO JH G UIF NFBTVSFNFOUT BSF TJHOJGJDBOUMZ EJGGFSFOU GSPN UIF MFWFMT TIPXO JO UIF GJHVSFT UIF 1 JT EFFNFE UP CF EBNBHFE JH JH Sequence of Measurement Measurement Normal Standards 1 P U 0 4V 0 6V 2 P V 0 4V 0 6V Sequence of Measurement Measurement Normal Standards 1 U Nu 0 4V 0 6V 2 V Nv ...

Page 109: ... FBTVSFNFOU PEF FBTVSF UIF WPMUBHFT PG 1_3 1_4 1_5 BT TIPXO JO JH FBTVSF UIF WPMUBHFT PG 5_ V 4_ W 3_ X BT TIPXO JO JH G UIF NFBTVSFNFOUT BSF TJHOJGJDBOUMZ EJGGFSFOU GSPN UIF MFWFMT TIPXO JO UIF GJHVSFT UIF 1 JT EFFNFE UP CF EBNBHFE JH JH Sequence of Measurement Measurement Normal Standards 1 P U 0 4V 0 6V 2 P V 0 4V 0 6V 3 P W 0 4V 0 6V Sequence of Measurement Measurement Normal Standards 1 U Nu ...

Page 110: ...lectronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ PFCM Point 4kW 5kW PFCM Point 1 1JO SSBOHFNFOU BOE 1JO VNCFST 1 1JO SSBOHFNFOU BOE 1JO VNCFST P P R R S S N N ...

Page 111: ...s Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ IPM Check Point 6kW 7kW P T S R N U N V N W 1 1JO SSBOHFNFOU BOE 1JO VNCFST 1 1JO SSBOHFNFOU BOE 1JO VNCFST P R S N PFCM Point ...

Page 112: ... Causes Installation Overload Closing of SVC valve under over charging with refrigerant infiltration of water into refrigerant outdoor device shielding outdoor fan fault EEV valve fault and sensor fault or assembling error Compressor Open Short of the coil in the compressor insulation breaking between the coil in the compressor and the sash damage of compressor with abrasion and compressor connect...

Page 113: ...nection state Checking outdoor fan operation Checking compressor phase resis tance Checking pipes for Bending blocking Checking compressor insulation resistance Checking EEV for motion Ⲽ IFDL GPS _ 7 Ⲽ 3FGFS UP QBHF Ⲽ BOJGPME HBVHF Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QBHF MPX PG USPVCMF EJBHOPTJT Checking IPM connection state Checking single unit of IPM Checking Compressor c...

Page 114: ...verload Transfer of signals with detection of the flow of over current in PSC PFC Outdoor device shielding Compressor Open Short of the coil in the compressor insulation breaking between the coil in the compressor and the sash damage of compressor with abrasion and compressor connection fault PCB Assembly Damage of PSCM PFCM and input current detection circuit fault Others Input of abnormal power ...

Page 115: ...king power connection state Checking reactor Terminal connection Checking outdoor fan operation Checking compressor phase resistance Checking pipes for Bending blocking Checking compressor insulation resistance Checking EEV for motion Ⲽ IFDL GPS _ 7 Ⲽ IFDL UIF SFBDUPS UFSNJOBM JOTFSUJPO TUBUF Ⲽ 3FGFS UP QBHF Ⲽ BOJGPME HBVHF Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QBHF MPX PG USP...

Page 116: ... Overload Transfer of signals with detection of the flow of over current in PSC PFC blocking of a outdoor unit Compressor Open Short of the coil in the compressor insulation breaking between the coil in the compressor and the sash damage of compressor with abrasion and compressor connection fault PCB Assembly Compressor current detection circuit fault DC link detection circuit fault and fault of s...

Page 117: ...onnection state Checking outdoor fan operation Checking compressor phase resistance Checking pipes for Bending blocking Checking compressor insulation resistance Checking EEV for motion Ⲽ IFDL GPS _ 7 Ⲽ 3FGFS UP QBHF Ⲽ BOJGPME HBVHF Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QBHF MPX PG USPVCMF EJBHOPTJT Checking IPM connection state Checking single unit of IPM Checking Compressor ...

Page 118: ...vated exceeding the standard Expected Causes Installation Installation fault closing of SVC valve under over charging with refriger ant and infiltration of moisture into refrigerant Overload Outdoor device shielding outdoor fan fault and EEV valve fault Compressor Short between compressor coil and sash abrasion of compressor and short opening of compressor coil PCB Assembly Compressor current and ...

Page 119: ...ing outdoor devices for shielding Checking under over charging with refrigerant Checking compressor wiring Checking outdoor fan operation Checking compressor phase resistance Checking pipe blocking Checking compressor insulation resistance Checking the work of EEV Ⲽ IFDL GPS _ 7 Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP NBOJGPME HBVHF Ⲽ 3FGFS UP QBHF MPX PG USPVCMF EJBHOPTJT Checking outset Temperature sensor Ⲽ ...

Page 120: ...mperature value from the tempera ture sensor Condition for Generation Damage of temperature sensor Short Open Classification Causes in Detail PCB Assembly Connector open damaged insulation of sash damage of the wire coat ing of temperature sensors Code No Details of Errors 41 Inverter Discharge temperature sensor Open Short 43 High pressure Sensor Error 44 Outdoor air temperature sensor Open Short...

Page 121: ...U PG UIF VOJRVF SFTJTUBODF CZ TFOTPS UFNQFSBUVSF 1PTJUJPO 0VUMFU PG DPNQSFTTPS 4FOTPS WBMVF Lⱕ Ⰽ BTFE PO Ⳅ 1PTJUJPO 3FBS QBSU PG PVUEPPS EFWJDF 4FOTPS WBMVF Lⱕ Ⰽ BTFE PO Ⳅ 1PTJUJPO PNQSFTTPS JOMFU BOE QJQF 4FOTPS WBMVF Lⱕ Ⰽ BTFE PO Ⳅ ⴘ Compressor discharge sensor ⴚ Outdoor temperature sensor ⴙ Pipe sensor 200 Ω 5 Ω 5 Ω Compressor inlet sensor Pipe sensor 10 Ω 4FOTPS IFDLJOH FUIPET 6 7 Troubleshoot...

Page 122: ...WBMWF CBTFE PO DPPMJOH NPEF O DBTF PG VMUJ NPEFMT 68 68 DIFDL UIF FKFDUJPO PG 4VC 1 KFDUJPO PG TVC 1 OTFSU UIF TVC 1 UP UIF BJO 1 ⴛ Pressure sensor After power supplied the pressure on LGMV is normal before operating Voltage of 5V is output from the PCB The location and connection of connector is normal on PCB PCB checking and replacement Reconnection Replace the pressure sensor Checking start No ...

Page 123: ... OEPPS EFWJDFT L 1SPEVDU HVBSBOUFF 1FSDFOUBHF JT EJGGFSFOU GSPN FBDI NPEFM 0VUEPPS EFWJDF DBQBDJUZ 1SPEVDU HVBSBOUFF 4FMFDUJPO PG UIF QPTTJCMF DBQBDJUZ UP CF DPNCJOFE XJUI UIF PVUEPPS EFWJDF L L OEPPS EFWJDF DBQBDJUZ L L L 5PUBM DBQBDJUZ PG JOEPPS EFWJDFT L FYDFFET UIF NBYJNVN DPNCJOBUJPO DBQBDJUZ PG UIF PVUEPPS EFWJDF L OEPPS FWJDF 0WFS POOFDUJPO SSPS Judgment Method Model Name Maximum total capa...

Page 124: ...fering with communication 3FTFUUJOH QPXFS TPVSDF 8BJU GPS NJOVUFT BGUFS UVSOJOH UIF QPXFS PG UIF QSPEVDU PGG Items for checking Sub items for checking Resetting power source Connector Insufficient insertion of housing Damage of wire coating Check the Heat sink and Chassis Panel Checking power source LED Off Damage of wire coating Replacement of inverter PCB Replacement of main PCB Ⲽ U TIPVME OPU C...

Page 125: ...SJOH UIF DPNNVOJDBUJPO UFNT GPS DIFDLJOH IFDLJOH NFUIPE PG GBVMUZ QPJOUT ⴘ Insufficient insertion of wires ⴙ Damage of wire coating Interference with wires or wire coating damage with chopping ⴚ Inverter PCB LED Replacement of inverter PCB during LED Off after resetting OK NG OWJSPONFOU JOUFSGFSJOH 1 DPNNVOJDBUJPO 6 7 Troubleshooting Outdoor Error CH 52 PCB Communication Error ...

Page 126: ...XFS PG UIF QSPEVDU PGG Items for checking Sub items for checking Resetting power source Outdoor PCB Installation Replacing indoor PCB Check LGMV Communication rate Grounding Wire tongue termination Communication cable length No power Insert Connector Wire connection state Communication cable length Checking for LED Off Normal Operation G MFOHUI JT N PWFS 1MFBTF TFQBSBUF DPNNVOJDBUJPO XJSF Ⲽ 3FGFS ...

Page 127: ...FDL SFBDUPS DPOOFDUJPO TUBUF ⴙ IFDL GVTF TUBUF ⴚ IFDL XIFUIFS PVUEPPS 1 JT MJHIUFE PY VTF PY VTF PCBA Fuse PCBA Fuse PCBA Fuse 1VSQPTF IFDLJOH XIFUIFS PVUEPPS 1 JT OPSNBM UFNT GPS DIFDLJOH JHIUJOH PG GVTF EBNBHF BOE SFBDUPS DPOOFDUJPO FSSPS IFDLJOH FUIPE PG 0VUEPPS 1 6 7 Troubleshooting Outdoor Error CH 05 53 Indoor Outdoor Device Communication Error Detection by indoor devices ...

Page 128: ... by wire to wire ethod In case of additional connection connect the wires with soldering as shown below ⴙ Wire tongue termination fault ⴚ The cut section of the wire passes the insulation tape and causes a short with another wire ⴛ Communication noise by oxidized wire arrangement Soldering is required Wire to Wire Neutral Neutral OTUBMMBUJPO FOWJSPONFOU JOUFSGFSJOH XJUI UIF DPNNVOJDBUJPO PG JOEPPS...

Page 129: ...MUBHFT IFDL SFTJTUBODF PNNVOJDBUJPO JWF TIPVME CF JOGJOJUF IFDL SFTJTUBODF PNNVOJDBUJPO FUVSBM TIPVME CF JOGJOJUF IFDL SFTJTUBODF PNNVOJDBUJPO OE TIPVME CF JOGJOJUF 8IFO OQVU 7 IFDL 7 JWF FUVSBM OEPPS 0VUEPPS 0UIFSXJTF BSSBOHF UIF PNNVOJDBUJPO 8JSF IFDL 7 RVJQNFOU VMUJ FUFS 5FTU PEF 7PMUBHF OEPPS 0VUEPPS 5FSNJOBM CMPDL RVJQNFOU VMUJ FUFS 5FTU PEF 3FTJTUBODF IFDL 7PMUBHF OQVU PG 7 O P J U B D J O V...

Page 130: ...PNNVOJDBUJPO JOF BOE 1JQF GUFS 3FNPWJOH 1PXFS JOF 8JSF BOE PNNVOJDBUJPO JOF 8JSF IFDL UIF WPMUBHFT IFDL OGJOJUF 3FTJTUBODF CFUXFFO 1PXFS PNNVOJDBUJPO JOF BOE 1JQF JOF N L Gnd 皻柦 Ω Pipe N L Gnd 皻柦 Ω Pipe Check Resistance and Pipe Line Check Resistance Live and Pipe Check Resistance Neutral and Pipe N L Gnd 皻柦 Ω Pipe Check Resistance Communication Line and Pipe ...

Page 131: ...eserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting PNNVOJDBUJPO SBUF PSNBMMZ IFDL 7 PNNVOJDBUJPO SBUF 6 7 Troubleshooting Outdoor Error CH 05 53 Indoor Outdoor Device Communication Error Detection by indoor devices ...

Page 132: ...JUUFOUMZ T GPS TIPXJOH QPXFS PO BOE DPNNVOJDBUJPO TUBUVT BSF OPU PO PS OPU CMJOLJOH JO PVUEPPS JOWFSUFS 1 2 Causes PJTF EJTUVSC UIF PVUEPPS VOJU DPNNVOJDBUJPO XJUI JOEPPS VOJU 3 Improvement OTFSUJOH TNBMM DPOOFDUPS XJUI DBQBDJUPS JO OWFSUFS 1 PG 0VUEPPS 6OJU POOFDUPS DBO CF BQQMJFE UP UIF MJTU 1 1 P PO UIF OFYU QBHF VJEF XIFSF ZPV QVU JU PO UIF OFYU QBHF U IFMQT PVUEPPS VOJU DPNNVOJDBUF XJUI JOEPP...

Page 133: ...ed Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting 1IFOPNFOPO 1 1 0 PCBA P NO EBR362668 EBR356522 EBR481682 EBR610154 EBR614818 EBR633722 EBR652505 EBR683491 EBR723989 EBR753611 EBR741383 3FE PGG 3FE UVSO PO CVU OPU CMJOLJOH ...

Page 134: ...compressor Condition for Generation Main power wiring fault 3FTFUUJOH QPXFS TPVSDF 8BJU GPS NJOVUFT BGUFS UVSOJOH UIF QPXFS PG UIF QSPEVDU PGG Items for checking Sub items for checking Installation Checking N phase Checking for open and reverse phase Fuse damage R and S phases AC load Inverter PCB Checking for power phase loss Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QBHF 6 7 Troubleshooting Out...

Page 135: ...QBUUFSO ᐮ ᐭ R S T N R S T N R S T N R S T N R S T N R S T N 380 Vac 380 Vac N phase 380 Vac 220 Vac N phase ᐯ ᐰ N phase unavaila ble N phase unavaila ble N phase unavaila ble N phase availab le ᐯ ᐰ R S T N R S T N R S T N R S T N R S T N R S T N 220 Vac 220 Vac N phase 220 380 Vac N phase N phase availa ble N phase availa ble Vac N phase availa ble N phase unavaila ble 6 7 Troubleshooting Outdoor ...

Page 136: ... EPFT OPU HFOFSBUF WPMUBHF XBT VQHSBEFE 1PXFS NPEVMF SFRVJSFT DIFDLJOH 0QFSBUJPO XJUI SFQMBDFNFOU PG 3 BOE 4 QIBTFT POMZ Brown B Black Green Brown B Black Green R S T N R S T N Br k c a l B B n w o Green Brown B Black Green R S T N R S T N R S T N Vac Vac Vac Vac Vac Vac VEHNFOU FUIPE PG 3 4 5 QIBTF MPTT VEHNFOU NFUIPE PG PQFO BOE SFWFSTF QIBTF PG 3 4 5 6 7 Troubleshooting Outdoor Error CH 54 Open...

Page 137: ...PS NJOVUFT BGUFS UVSOJOH UIF QPXFS PG UIF QSPEVDU PGG How to check the EEPROM assembling state of outdoor devices ⴘ IFDL UIF EJSFDUJPO PG 130 4IBQF PG NBSLJOH MJOF BOE EJSFDUJPO PG 130 ⴙ IFDL XIFUIFS 130 JT QFSGFDUMZ BEIFSFE ⴚ IFDL XIFUIFS 130 MFBE JT QVU PVU PG UIF PVUMFU Items for checking EEPROM IC containing the operation data suitable to the product Sub items for checking Power Source Prompt ...

Page 138: ... 138 Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ EEPROM Position 2 2 5kW 4kW 5kW 6kW 7kW ...

Page 139: ...nt cycle disorder and sensor unit fault 3FTFUUJOH QPXFS TPVSDF 8BJU GPS NJOVUFT BGUFS UVSOJOH UIF QPXFS PG UIF QSPEVDU PGG Installation Cycle Sensor Replacing PCB Whether to shield Pipe blocking Properties of unit Checking service valve for opening Checking EEV for proper working Checking refrigerant for leakage or overcharging Checking fan for working Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QBHF Ⲽ 3FGFS UP QB...

Page 140: ... of damage of IPM and PSCM PFCM Condition for Generation Heat sink temperature reaches the limit level 3FTFUUJOH QPXFS TPVSDF 8BJU GPS NJOVUFT BGUFS UVSOJOH UIF QPXFS PG UIF QSPEVDU PGG Items for checking Sub items for checking Installation Whether to shield Outdoor Fan Restoration of temperature Checking for proper working Checking for proper working Replacing PCB 6 7 Troubleshooting Outdoor Erro...

Page 141: ...Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting JOL 7PMUBHF MFWFM Controller Current Level All PCBA 95 7kW 85 IFDL 7 GPS 6 7 Troubleshooting Outdoor Error CH 62 Heat sink High Error ...

Page 142: ... Sub items for checking Working Temperature Outdoor Temperature Replacing PCB Environmental factor checking method 5IF QSPEVDUT XPSLT XIFO PVUEPPS UFNQFSBUVSF JT ⴍ Ⳅ FOFSBUJPO PG DBTF NJOVUFT BGUFS UIF PQFSBUJPO PG UIF QSPEVDU G CPUI PG BCPWF TUBUFE DPOEJUJPOT BSF TBUJTGJFE FOWJSPONFOUBM GBDUPS JT UIF DBVTF Sensor checking method 1PXFS 0GG FBTVSF UIF SFTJTUBODF VTJOH B UFTUFS FBTVSF UIF SFTJTUBODF...

Page 143: ...ght 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 Trouble Shooting Ǎᇥ Heat sink Tempe Sensor Point 2 2 5kW 4kW 5kW 6kW 7kW Ω Ω Ω 14 16 19 20 19 20 19 20 ...

Page 144: ...bly Damage of fan motor driving circuit CH67 Cause of Generation Trouble Checking Flow Cautions Sub items for checking Outdoor Fan Outdoor fan damage Connection state PCBA PUI UIF GBO BOE 1 NBZ CF EBNBHFE XIFO UIF GBO DPOOFDUPS JT NPVOUFE PS SFNPWFE JO UIF TUBUF UIBU UIF QPXFS JT TVQQMJFE PUI UIF GBO BOE 1 NBZ CF EBNBHFE XIFO UIF GBO DPOOFDUPS JT JOTFSUFE JO SFWFSTF EJSFDUJPO G GBO NPUPS GBVMU JT ...

Page 145: ... How to check the outdoor fan motor of BLDC Tester ᱶᔢᱡ 10 ᐭ ᐰ Ũ Ũ ᐱ ᐰ Dozens kѤ hundreds kѤ Dozens kѤ hundreds kѤ ᐲ ᐰ Ũ Ũ ᐳ ᐰ Dozens kѤ hundreds kѤ Dozens kѤ hundreds kѤ IFDLJOH 5FNQFSBUVSF 4FOTPS 0QFO 4IPSU 6 7 Troubleshooting Outdoor Error CH 65 Heat sink Temperature Sensor Open Short Copyright 2013 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Onl...

Page 146: ...P NO MFL67478301 December 2013 ...

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