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LG TMNC092DYAA Service Manual
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LG TMNC092DYAA Service Manual

LG TMNC092DYAA Service Manual

Multi type air conditioner
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LG
Multi Type Air Conditioner

SERVICE MANUAL

MODEL: Indoor Unit: Wall Mounted Type
Outdoor Unit: T2UC182FAA
TMNC092DYAA
TMNC122DYAA
TMNC182D5AA
TMNC242D5AA
TMNC092TYAA
TMNC122TYAA
TMNC182T5AA
TMNC242T5AA
T2UC242FAA
T2UC362FAA
T2UC482FAA
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
website http://www.lgservice.com
e-mail http://www.lgeservice.com/techsup.html
TMNH092DYAA
TMNH122DYAA
TMNH182D5AA
TMNH242D5AA
TMNH092TYAA
TMNH122TYAA
TMNH182T5AA
TMNH242T5AA
T2UH182FAA
T2UH242FAA
T2UH362FAA
T2UH482FAA
LG

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Summary of Contents for LG TMNC092DYAA

  • Page 1: Service Manual

    Multi Type Air Conditioner SERVICE MANUAL MODEL: Indoor Unit: Wall Mounted Type TMNC092DYAA TMNH092DYAA TMNC122DYAA TMNH122DYAA TMNC182D5AA TMNH182D5AA TMNC242D5AA TMNH242D5AA TMNC092TYAA TMNH092TYAA TMNC122TYAA TMNH122TYAA TMNC182T5AA TMNH182T5AA TMNC242T5AA TMNH242T5AA Outdoor Unit: T2UC182FAA T2UH182FAA T2UC242FAA T2UH242FAA T2UC362FAA T2UH362FAA...

  • Page 2: Table Of Contents

    Multi Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions ............................3 Product Specifications ..........................7 Dimensions ..............................9 Refrigeration Cycle Diagram ........................12 Wiring Diagram ............................13 Electronic Control Device .........................14 Schematic Diagram ...........................17 Functions ..............................19 Operation Details ............................22 Disassembly ..............................26 2-way, 3-way Valve ............................29 Cycle Troubleshooting Guide ........................33 Installation ..............................39...

  • Page 3: Safety Precautions

    Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. WARNING This symbol indicates the possibility of death or serious injury.
  • Page 4 Safety Precautions Do not modify or extend the Do not install, remove, or re- Be cautious when unpacking power cable. install the unit by yourself and installing the product. (customer). • There is risk of fire or electric shock. • There is risk of fire, electric shock, •...
  • Page 5 Safety Precautions Do not store or use flammable gas or com- If strange sounds, or smell or smoke comes bustibles near the product. from product. Turn the breaker off or discon- nect the power supply cable. • There is risk of fire or failure of product. •...
  • Page 6 Safety Precautions CAUTION Installation check for gas (refrigerant) Install the drain hose to Keep level even when leakage after installation or ensure that water is drained installing the product. repair of product. away properly. • Low refrigerant levels may cause fail- •...

  • Page 7: Product Specifications

    Product Specifications Product Specifications Indoor Unit t t i l l a Model TMNH092DYAA TMNH122DYAA Power Supply Ø,V,Hz 1Ø, 220V, 60Hz 1Ø, 220V, 60Hz i l o y t i r h / 9,000 12,000 2,638 3,517 kcal/hr 2,268 3,024 Heating y t i r h /...
  • Page 8 Product Specifications Outdoor Unit Item Unit T2UH182FAA T2UH242FAA 3077/ 3077 3517 / 3517 A (SY 9K) Btu/hr 10500 / 10500 12000 / 12000 Capacity 3077/ 3077 3517 / 3517 B (SY 9K ) (Cooling/heating) Btu/hr 10500 / 10500 12000 / 12000 5275 / 5275 7034 A+B (9K+9K)

  • Page 9: Dimensions

    Dimensions Dimensions Indoor Unit Installation plate Model TMNH092DYAA TMN 122DYAA Dimension Service Manual 9...
  • Page 10 Dimensions Outdoor Unit Model: T2UH182FAA Gas side 3-way valve Liquid side 2-way valve MODEL T2UH182FAA 543.6 11.4 72.5 74.5 10 Multi Air Conditioner...
  • Page 11 Dimensions Model : T2UH242FAA Gas side 3-Way valve Liquid side 2-Way valve MODEL T2UH242FAA Service Manual 11...

  • Page 12: Refrigeration Cycle Diagram

    Refrigeration Cycle Diagram Refrigeration Cycle Diagram T2UH182FAA / T2UH242FAA Indoor Side Outdoor Side Comp Comp Refrigerent Flow Cooling Heating 12 Multi Air Conditioner...

  • Page 13: Wiring Diagram

    Wiring Diagram Wiring Diagram Indoor Unit Outdoor Unit T2UH182FAA T2UH242FAA RD BRYL BLRD WH BL BK BL OR BL EBY49965302 EBY49965301 Service Manual...

  • Page 14: Electronic Control Device

    Electronic Control Device Electronic Control Device Indoor Unit • MAIN P.C.B ASM • TOP VIEW • BOTTOM VIEW 14 Multi Air Conditioner...

  • Page 15: Outdoor Unit

    Electronic Control Device Outdoor Unit Service Manual...
  • Page 16 Electronic Control Device Display P.C.B ASM Multi Air Conditioner...

  • Page 17: Schematic Diagram

    Schematic Diagram Schematic Diagram Indoor Unit Service Manual...
  • Page 18 Schematic Diagram Multi Air Conditioner...

  • Page 19: Functions

    Functions Function of Indoor Unit Wall mounted type Operation ON/OFF by Remote controller Sensing the Room Temperature • Room temperature sensor. (THERMISTOR) Room temperature control • Maintains the room temperature in accordance with the Setting Temp. Starting Current Control • Indoor fan is delayed for 5 seconds at the starting. Time Delay Safety Control •...
  • Page 20 Functions Remote Controller Operation ON/OFF Operation Mode Selection Cooling Operation Mode.( (Cooling Healthy Dehumidification Operation Mode.( Heating Operation Mode.( model only) Fan Speed Selection (Low) (Med) (High) (CHAOS) Energy Saving Mode Temperature Setting TEMPERATURE HIGH Down to 18°C Cooling Up to 30°C JET COOL Sleep Operation : Cancel Sleep Mode, Timer ON or Timer OFF...

  • Page 21: Display Function

    Function Display Function Operation Indicator • Cooling, Soft Dry, Fan Sleep Timer Indicator • Sleep Mode Energy Saving Mode Compressor on Indicator DOOR Self-diagnosis Function Error Indicator • The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble. •...

  • Page 22: Operation Details

    Operation Details Operation Details Function of Cont r ols • DISPL A Y C/O Model Operation Indicator • ON while in appliance operation, OFF while in appliance pause. • Sleep Mode Comp. Running Incidator • Energy Saving Mode Cooling Mode Operation •...
  • Page 23 Operation Details Airflow Speed Selection • The airflow speed of the indoor fan is set to high, medium, low, or chaos (auto) by the input of the airflow speed selection key on the remote control. Sleep Timer Operation • When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote control while in appli- ance operation, the operation of the appliance stops.
  • Page 24 Operation Details Auto restart • In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate procedures automatically to the previous operating conditions. Protection of the evaporator pipe from frosting • If the indoor pipe temp is below 0°C in 7 min. after the compressor operates without any pause while in cool- ing cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoor evaporator pipe from frosting.
  • Page 25 Operation Details Remote Control Operations Service Manual...

  • Page 26: Disassembly

    Disassembly Disassembly Indoor Unit Disconnect the unit from power supply before mak- ing any checks. Be sure the power switch is set to “OFF ”. To remove the Grille from the Chassis. • Set the up-and-down air discharge louver to open position (horizontally) by finger pressure.
  • Page 27 Disassembly 2. To remove the Control Box. • Remove securing screws. • Pull the control box out from the chassis carefully. Screw 3. To remove the Discharge Grille. • Unhook the discharge grille and pull the discharge grille out from the chassis carefully. 4.
  • Page 28 Disassembly • Unhook the tab on the right inside of the chassis at the same time, slightly pull the evaporator toward you until the tab is clear of the slot. 5. To remove the Motor Cover • Remove 2 securing screw. •...

  • Page 29: 2-Way, 3-Way Valve

    2-way, 3-way Valve 2-way, 3-way Valve 2-way Valve (Liguid Side) 3-way Valve (Gas Side) Valve cap Hexagonal wrench Open position (4mm) Closed position Flare nut Flare nut Open position Closed position piping piping Service Service connection connection port cap port To outdoor unit To outdoor unit Works...

  • Page 30: Pumping Down

    2-way, 3-way Valve (1) Pumping down Liquid side Indoor unit Outdoor unit Close 2-Way valve Gas side Open 3-Way valve manifold gauge Low-handle Hi- handle (CLOSE) (CLOSE) Procedure • 6. Operate the air conditioner at the cooling cycle 1. Confirm that both the gas side and liquid side and stop it when the gauge indicates 1kg/cm valves are set to the open position.
  • Page 31 2-way, 3-way Valve (2) Evacuation (All amount of refrigerant leaked) Liquid side Indoor unit Outdoor unit Close 2-Way valve Gas side Open 3-Way valve manifold gauge Vacuum pump Low- handle Hi- handle (OPEN) (CLOSE) • Procedure 7. Disconnect the charge hose from the vacuum 1.

  • Page 32: Gas Charging

    2-way, 3-way Valve (3) Gas Charging (After Evacuation) Liquid side Indoor unit Outdoor unit Close 2-Way valve Gas side Open 3-Way valve manifold gauge Charging cylinder Low-handle Hi- handle (OPEN) Check valve (CLOSE) • Procedure 1. Connect the gauge to the charging cylinder. 4.

  • Page 33: Cycle Troubleshooting Guide

    Cycle Troubleshooting Guide Cycle Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air and operating current. Temp. difference : approx. 0°C All amount of refrigerant leaked out. Current : less than 80% of Check refrigeration cycle. rated current Temp.

  • Page 34: Electronic Parts

    Cycle Troubleshooting Guide Electronic Parts Product does not operate at all. (* Refer to Electronic Control Device drawing and Schematic diagram.) Turn off Main Power (After 10 seconds) Turn on Main Power Does "beeping" sound is made from the Indoor Unit? Primarily, the operating condition of Micom is OK.

  • Page 35: The Product Is Not Operate With The Remote Controller

    Cycle Troubleshooting Guide The product is not operate with the remote controller. Turn on Main Power While the compressor has been stopped, the compressor does not operate owing to the delaying function for 3 minutes after stopped. When the compressor stopped Indoor Fan is driven by a low speed. At this point the wind speed is not controlled by the remote controller.

  • Page 36: Compressor/Outdoor Fan Are Unable To Drive

    Cycle Troubleshooting Guide Compressor/Outdoor Fan are unable to drive. Turn on Main Power Operate "Cooling Mode( )" by setting the desired temperature of the remote controller is less than one of the indoor temperature by 1°C at least. When in Air Circulation Mode, Compressor/Outdoor Fan is stopped. Check the sensor for indoor temperature is attached as close as to be effected by the temperature of Heat Exchanger(EVA).

  • Page 37: When Indoor Fan Does Not Operate

    Cycle Troubleshooting Guide When indoor Fan does not operate. Turn off Main power Check the connection of CN-MOTOR Check the Fan Motor Check the Fuse(AC250V/T2A) Check the related circuit of indoor Fan Motor. • The pin NO 58 of Micom, and the part for driving TRIAC(the input and output signal of IC01M, PIN NO 1, 16) •...

  • Page 38: When Vertical Louver Does Not Operate

    Cycle Troubleshooting Guide When Vertical Louver does not operate. • Confirm that the Vertical Louver is normally geared with the shaft of Stepping Motor. • If the regular torque is detected when rotating the Vertical Louver with hands Normal • Check the connecting condition of CN-U/D Connector •...

  • Page 39: Installation

    Installation Installation Select the best Location more than more than 20cm 20cm 1. If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure that heat radiation from the condenser is not more than restricted.
  • Page 40 Installation Multi Air Conditioner...
  • Page 41 Installation Piping Length and Elevation • The maximun allowable level and piping length Installation of the outdoor unit on an upper position 7.5m 7.5m Installation of the outdoor unit on a lower position 7.5m 7.5m Model Standard length Max. piping length of each indoor unit Max.

  • Page 42: Flaring Work And Connection Of Piping

    Flaring work and connection of piping Flaring work and connection of piping Flaring work • Carry out flaring work using flaring tool as shown below. Outside diameter Flaring work inch Main cause for refrigerant leakage is due to defect in the Ø6.35 0~0.5 flaring work.

  • Page 43: Indoor Unit Installation

    Flaring work and connection of piping Connecting the pipings to the indoor unit and For right rear piping drain hose to drain pipe. Route the indoor tubing and the drain hose in the direction of • Align the center of the pipes and sufficiently tighten rear right.

  • Page 44: For Left Rear Piping

    Flaring work and connection of piping • Bundle the piping and drain hose together by wrapping Connecting the pipings to the indoor unit and them with vinyl tape for enough to cover where they fit into the drain hose to drain pipe. the rear piping housing section.
  • Page 45 Flaring work and connection of piping • Wrap the area which accommodates the rear piping hous- Indoor unit installation ing section with vinyl tape. • Remove the spacer. Indoor Connection • Ensure that the hooks are properly seated on the installa- unit piping pipe tion plate by moving it left and right.

  • Page 46: Connection Of The Pipes-Outdoor

    Flaring work and connection of piping Connection of the pipes-Outdoor • Bad case Align the center of the pipings and sufficiently • Following bending type from right to left could cause tighten the flare nut by hand. problem of pipe damage. Finally, tighten the flare nut with torque wrench until the wrench clicks.

  • Page 47: Connecting The Cable Between Indoor Unit And Outdoor Unit

    Connecting the cable between indoor unit and outdoor unit Connecting the cable between indoor unit and outdoor unit Connect the cable to the Indoor unit. Connection of the cable 1. Remove the cover control from the unit by loosening the screw. Connect the wires to the terminals on the control board individually as the following.
  • Page 48 Connecting the cable between indoor unit and outdoor unit The power cord connected to the outdoor unit should be complied with the following specifications (ETL recognized and CSA certified). T2UH182FAA T2UH242FAA Grade NORMAL CROSS T2UH182FAA T2UH242FAA -SECTIONAL AREA Cable Type(B) H07RN-F H07RN-F The power connecting cable connected to the indoor and outdoor unit should be complied with...

  • Page 49: Exploded View And Replacement Parts List

    Exploded View and Replacement Parts List Exploded View and Replacement Parts List Indoor Unit 135316 135515 131410 342800 359011 135311 354210-1 352111 352116 346810 352115 135516 354210-2 35211B W0CZZ 263230 267110 267110 For model DYAA For model D5AA Service Manual 49...
  • Page 50 Exploded View and Replacement Parts List • 263230 Service Manual...
  • Page 51 December, 2007 P/No.: Printed in China...

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