Related Manuals for LG TCM 18
Summary of Contents for LG TCM 18
- Page 1 Floor-ceiling type SERVICE MANUAL MODEL: TCM 18 TCM 24 (Applied to new Refrigerant R-410A)
-
Page 2: Table Of Contents
Contents Functions ..........................3 Product Specifications (Cooling & Heating).................5 Dimensions ..........................6 Refrigeration Cycle Diagram ....................8 Wiring Diagram........................9 Operation Details ........................10 Display Function ........................16 Self-diagnosis Function......................18 Installation ..........................19 Operation ..........................36 Disassembly of the parts (Indoor Unit) ................37 2-way, 3-way Valve.........................41 Cycle Troubleshooting Guide....................46 Electronic Parts Troubleshooting Guide................47 Electronic control device......................51 Schematic Diagram .......................52... -
Page 3: Functions
Functions Indoor Unit 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 4 Remote Controller Operation ON/OFF Operation Mode Selection Cooling Operation Mode.( Auto Operation Mode.( (Cooling (Heating Soft Dry Operation Mode.( Heating Operation Mode.( model only) model only) Fan Speed Selection (Low) (Med) (High) (CHAOS) Room Temperature Display : High:39°C °Í LOW:11°C Temperature Setting Down to 18°C Down to 16°C...
-
Page 5: Product Specifications (Cooling & Heating)
Product Specifications Model Name TCM 18 TCM 24 Item Unit Cooling Capacity Btu/h(kcal/h) 20,000(5,040) 25,000(6,300) Heating Capacity Btu/h(kcal/h) Moisture Removal Power Source ø, V, Hz 1ø, 220-240V~, 50Hz Indoor 13.5 Air Circulation /min Outdoor Input Cooling 1,950 2,550 Heating Running Current Cooling 12.0... -
Page 6: Dimensions
Dimensions (1) Indoor Unit 1 2 0 0 m m 205mm 63mm 38mm 175mm (Installation Plate) 250mm (Rear Side) –6–... - Page 7 (2) Outdoor Unit Gas side 3-way valve Liquid side 3-way valve MODEL TCM 18 TCM 24 74.5 –7–...
-
Page 8: Refrigeration Cycle Diagram
Refrigeration Cycle Diagram • TCM 18 • TCM 24 INDOOR UNIT OUTDOOR UNIT LIQUID SIDE CAPILLARY TUBE HEAT HEAT EXCHANGER EXCHANGER (EVAPORATOR) (CONDENSER) COMPRESSOR GAS SIDE Pipe size(Diameter:ø) Piping length(m) Elevation(m) MODEL Liquid Rated Rated TCM 18 1/2" 1/4" TCM 24 1/2"... -
Page 9: Wiring Diagram
Wiring Diagram (1) Indoor Unit TCM-18/24 TRANS- THERMISTOR FORMER CAPACITOR CN-TRANS CN-TH BR YL CN-FAN MAIN PCB RY-L ASSY. MOTOR RY-M GN/YL RY-H DOOR S/W 1,2 GN/YL STEP MOTOR FUSE T3.15A STEP RY-COMP MOTOR CN-4WAY CN-DISP GN/YL TERMINAL 1 ( L ) 2 ( N ) DISPLAY PCB BLOCK ASSY. -
Page 10: Operation Details
Operation Details (1) The function of main control 1. Time Delay Safety Control • 3min … The compressor is ceased for 3minutes to balance the pressure in the refrigeration cycle. (Protection of compressor) • 5sec … Vertical air flow direction control louvers open in 5 seconds to prevent noise between louvers and wind. •... - Page 11 3. Cooling Mode Operation • When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote controller and the operation diagram is as following Intake Air temp. COMP. ON (SET TEMP.+0.5°C) COMP. OFF More than More than (SET TEMP.
- Page 12 5. Auto Operation • The operation procedure is as following. (Cooling & Heating Model) Press Start/Stop Button Select Auto Operation Mode Check the Room temperature Operation mode Indoor fan speed are automatically decided by Fuzzy rule. Setting temperature Intake-air below Over below 21°C Over 24°C...
- Page 13 Auto Operation for Soft Dry The Setting temperature will be same as that of the current intake-air temperature. - Compressor ON temperature; Setting temperature +1°C - Compressor OFF temperature; Setting temperature -0.5°C Auto Operation for Heating. (Heating model only) Intake Air temp. below 20°C over 20°…~below 21°C Setting temp.
- Page 14 6. Natural wind by CHAOS logic For more fresh feeling than other fan speed mode, press the indoor fan Speed Selector and set to CHAOS mode. In this mode, the wind blows like natural breeze by auto- matically changing fan speed according to the CHAOS logic.
- Page 15 7. Heating Mode Operation The unit will operate according to the setting by the remote controller and the operation diagram is shown as following. • For Heating Model Indoor piping temp. 28°C 26°C Intake Air temp. Setting temp. +3.0˚C (Compressor OFF) Setting temp.
- Page 16 9. Deice Control • While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing, reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit. • Defrost control is available 45 min. later since heating mode operation started, and it will not prolong over 10 min. •...
- Page 17 11. Forced operation • If you lose wireless remote controller, you can operate the unit with forced operation switch. • The standard conditions are as following. Heat pump Model Room Temp ≥ 24°C 21°C ≤ Room Temp < 24°C Room Temp < 21°C Operation Mode Cooling Soft Dry...
-
Page 18: Display Function
Display Function 1. Heating Model 2. Cooling Model Operation Indicator Operation Indicator • Coolling, Soft Dry, Fan, Heating • Coolling, Soft Dry, Fan Timer Indicator Timer Indicator • Timer Mode • Timer Mode Sleep Timer Indicator Sleep Timer Indicator • Sleep Mode •... -
Page 19: Installation
Installation 1. Installation of Indoor, Outdoor Unit 1. Selection of the best location More than 20cm 1) Indoor unit More than • There should not be any heat source or steam near 20cm the unit. • There should not be any obstacles to prevent the air circulation. - Page 20 2. Indoor unit installation Before Installing, prepare Installation Plates • 'Installation Plates' are attached at the bottom of indoor unit. Detach them by removing each 3 screws at both Side Plate sides. • Detach 'Side Plate (R,L)' by removing each 2 screws on both sides.
- Page 21 • Insert the nuts and washer onto the suspension bolts for locking the suspension bolts on the ceiling. Anchor nut • Mount the suspension bolts to the anchor-nuts firmly. • Secure the Installation plates onto the Suspension Ceiling bolts (adjust level roughly.) using nuts, washers and spring washers.
- Page 22 CAUTION 1. Install declination of the indoor unit is very important for the drain of the convertible type air conditioner. 2. Minimum thickness of the insulation for the connecting pipe shall be 7mm. 3. If the Installation Plates are fixed to horizontal line, the indoor unit after installing will be declined to the bottomside.
- Page 23 • Secure the unit to the Installation Plates with four M8 bolts and washers. • Before working, refer to "Connecting pipe and cable to Indoor Unit" on page 28/31. • Hook up the Inlet Grille Hook to the cabinet. Inlet hanger •...
- Page 24 2) Installation on the Wall • Select and mark the position for fixing bolts and piping hole. Decide the position for fixing bolts slightly tilted to the drain direction after considering the direction of drain hose. • Drill the hole for anchor nut on the wall. •...
- Page 25 Install the Indoor unit onto Installation Plate. • Insert 2 hooks on the both left and right side of the unit Inner slot to the inner slot (wall side) of the Installation Plate. • Secure the unit to the Installation Plate with four M8 bolts and washers.
- Page 26 3) Installation on the floor From the left wall Installation of Mount Bracket. more than 760mm • Select and mark the position for Mount Brackets and the piping hole. From the • Drill the hole for the anchor nut on the wall. right wall •...
- Page 27 2. Piping and Drainage of Indoor Unit 2-1. Preparation of Piping Pipe cutter 1. Cut the pipes and the cable. • Use the accessory piping kit or the pipes pur- chased locally. Slanted Rough • Measure the distance between the indoor and the outdoor unit.
- Page 28 2-2. Installation on the ceiling 1) Connecting the pipes to the indoor unit The pipe can be connected to right side, bottom or back of the unit. 1. For the Right Side Piping • After bending an end of the connecting tube, align the center of the pipings and sufficiently tighten the flare Hose nut with fingers.
- Page 29 2-3. Installation on the wall or floor 1) Connecting the pipes to the indoor unit 1. For the Right Rear Piping Piping • Remove the knock-out at the back side of the cabinet. • After bending an end of the connecting tube, align the Taping center of the pipings and sufficiently tighten the flare nut with fingers.
- Page 30 3. Connecting Pipes to the Outdoor Unit 1) Connecting the pipes to the Outdoor unit 1. Align the center of the pipings and sufficiently tighten the flare nut with fingers. 2. Finally, tighten the flare nut with torque wrench until the wrench clicks. •...
- Page 31 5. Connecting Cables between Indoor Unit and Outdoor Unit 1) Connecting cables to the Indoor Unit 1) Remove the Air guide - L by loosening 2 screws after removing the Inlet grille from the Indoor unit. 2) Connect the wires to the terminals on the con- trol board individually according to the outdoor AIR GUIDE-L unit connection.
- Page 32 3) Connecting the cable to Outdoor Unit Outdoor unit 1. Remove the Cover control from the unit by loosening Terminal block a screw. Connect the wires to the terminals on the control Over 5mm board individually as following. Holder for 2.
- Page 33 4) Form the pipings Seal a small opening around the pipings 1. Wrap the connecting portion of indoor unit with with gum type sealer. the Insulation material and secure it with two Plastic Bands. (for the right pipings) • If you want to connect an additional drain hose, the Taping end of the drain-outlet should keep distance from the ground.
- Page 34 6. Air Purging of the Pipes and Indoor Unit The air which contains moisture remaining in the refrigeration cycle may cause a malfunction on the compressor. 1. Confirm that both the liquid side valve and the gas side valve are set to the closed position. 2.
- Page 35 7. Test running 1) Connection of power supply 1. Connect the power supply cord to the inde- pendent power supply. • Circuit breaker is required. 2. Prepare the remote control. • Insert two batteries provided. Remove the battery cover from the remote con- troller.
-
Page 36: Operation
Operation (1) Name and Function-Remote controller Cooling Model OPERATION DISPLAY Remote Controller Displays the operation conditions. START/STOP BUTTON Signal transmitter. Operation starts when this button is pressed and stops when the button is pressed again. Transmits the signals to the room air conditioner. OPERATION MODE SELECTION BUTTON Used to select the operation mode. -
Page 37: Disassembly Of The Parts (Indoor Unit)
Disassembly of the parts (Indoor unit) Warning : Disconnect the unit from power supply before making any checks. Be sure the power switch is set to “OFF”. 1. Remove the air filter. • Pull the inlet grille slightly toward you. •... - Page 38 4. Remove air guide upper, crossflow fan and motor. • Remove the screws of both sides and center securing the upper air-guide. • Remove 2 screws fastening the bracket of door switch. Door Switch • Remove a bearing assembly by removing a screw and the bearing cover.
- Page 39 6. Remove the front panel. Diffuser frame • Remove the screws of both sides fixing the front Diffuser panel. frame • Push the upper side of front panel strongly to pull Hook out the front panel from the inner hook of diffuser frame.
- Page 40 9. Remove the vane-upper, vane-lower and step motor. Step Motor • Remove 2 screws securing the step motor Vane Supporter assembly and pull it out from the vanes carefully. • Unhook the vanes from the vane supporter and remove the upper vane and lower vane by pulling the center of vanes with care.
-
Page 41: 2-Way, 3-Way Valve
2-way, 3-way Valve 2-way Valve (Liguid Side) 3-way Valve (Gas Side or Liquid Side) Valve cap Hexagonal wrench (4mm) Open position Flare nut Flare nut Closed position Open position Closed position piping piping Service Service connection connection port cap port To outdoor unit To outdoor unit Works... - Page 42 1. Pumping down Liquid side Indoor unit Outdoor unit Open 2(3)-Way valve Gas side Closed 3-Way valve CLOSE CLOSE Purge the air • Procedure (6) Immediately set the 3-way valve to the closed (1) Confirm that both liquid side and gas side position when the gauge indicates 1Kg/cm valves are set to the open position.
- Page 43 2. Evacuation Liquid side Indoor unit Outdoor unit 2(3)-Way valve Open Gas side 3-Way valve Open Vacuum pump OPEN CLOSE • Procedure (1) Connect the vacuum pump to the charge set’s CAUTION center hose Use vacuum pump equipped with check value applied to be prevented from flowing backward.
- Page 44 3. Gas Charging (After Evacuation) Liquid side Indoor unit Outdoor unit Open 2(3)-Way valve Gas side Open 3-Way valve Check valve Charging cylinder R-410A OPEN CLOSE • Procedure (1) Connect the charge hose to the charging This is different from previous procedures. cylinder.
- Page 45 4. Additional gas charging (Gas leakage) • When refrigerant is insufficient by leakage, recharge the unit with the refrigerant up to normal operating suction pressure. • Use the graph or the equation below to get operating suction pressure according to indoor and outdoor temperature.
-
Page 46: 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. Difference Refrigerant leakege Temp. -
Page 47: Electronic Parts Troubleshooting Guide
Electronic Parts Troubleshooting Guide Possible Trouble 1 : The unit does not operate. Is the input voltage Check the FUSE of transformer AC220V? and the wiring diagram Check the RY-COMP PIN 3 and CN-4WAY PIN 1 Is the output voltage Is shorted the Check the main P.C.B of transformer about AC14V? - Page 48 Possible Trouble 2 : The indoor fan does not operate. Does the temperature Adjust set temperature Is it DRY mode? set all right? Is it the HOT Does the temperature Adjust set temperature mode? set all right? Is IC02M operated Exchange IC02M normally? Is the each S.S.R...
- Page 49 Possible Trouble 3 : Up/Down Air direction louver does not operate. Is IC01M operated Exchange IC01M normally? Is the PIN 1 of Check the main P.C.B CN-UP/DOWN DC12V? DC12V pattern Check the step motor and connector (CN-UP/DOWN 1,2) Possible Trouble 4 : Remote controller does not operate.
- Page 50 Possible Trouble 5 : Ineffective Heating Check RY-4WAY Is 4way-valve operated? Is IC02M operated Exchange IC02M normally? Check the RY-4WAY and 4way-valve Possible Trouble 6 : The unit does not operate by forced operation switch. Is the F/OP key Exchange F/OP key any problem? Check P.C.B pattern check –50–...
-
Page 51: Electronic Control Device
Electronic control device (1) MAIN P.C.B ASM (TCM 18/24 : 6871A20042L) (2) DISPLAY P.C.B ASM (P/No.: 6871AQ3263A) –51–... -
Page 52: Schematic Diagram
Schematic Diagram –52–... -
Page 53: Exploded View And Replacement Parts List
Exploded View and Replacement Parts List 1. Indoor Unit –53–... - Page 54 Parts List PART No. LOCATION DESCRIPTION REMARK TCM 18 TCM 24 130911 CABINET ASSY 3091AP2533A 3091AP2533A 135314 GRILLE ASSY, INLET SUB 5237AP2817B 5237AP2817B 137213 PANEL ASSY, SIDE 3720AP2767P 3720AP2767P 137213 PWB(PCB) ASSY, MAIN 6871A20042L 6871A20042L 146811 MOTOR ASSY, STEP 4681AR2727G...
- Page 55 2. Outdoor Unit –55–...
- Page 56 Parts List PART No. LOCATION DESCRIPTION REMARK TCM 18 TCM 24 349480 ORIFICE 4948AP2527A 4948AP2527A 435311 GRILLE, DISCHARGE 3530A20007B 3530A20007B 435512 COVER ASSY, TOP(OUTDOOR) 3H03266U 3H03266U 437210 PANEL ASSY, FRONT 3721A20005E 3721A20005E 437212 PANEL ASSY, REAR 3720AP0003L 3720AP0003L 546810 MOTOR ASSY, OUTDOOR...
- Page 57 MEMO –57–...
- Page 58 MEMO –58–...
- Page 59 January, 2002 P/No.: 3828A20186D Printed in Korea...