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LWM1430BXN
User Manual
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LG LWM1430BXN, LWM1430TAS, LW-136 User Manual

ROOM AIR CONDITIONER
SERVICE MANUAL
CAUTION
- BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL.
- ONLY FOR AUTHORIZED SERVICE
MODEL: LWM1430TAS,BXN/LW-136
—2—
1. PREFACE
1.1 SAFETY PRECAUTIONS................................................................................................................................3
1.2 INSULATION RESISTANCE TEST.................................................................................................................3
1.3 SPECIFICATIONS...........................................................................................................................................3
1.4 FEATURES ....................................................................................................................
.................................4
1.5 CONTROL LOCATIONS............................................................................................................
.....................4
2.
DISASSEMBLY INSTRUCTIONS
2.1 MECHANICAL PARTS.............................................................................................................
.......................5
2.1.1 FRONT GRILLE...............................................................................................................
......................5
2.1.2 CABINET...................................................................................................................
.............................5
2.1.3 CONTROL BOX.....................................................................................................................................5
2.2 AIR HANDLING PARTS..................................................................................................................................6
2.2.1 COVER (AT THE TOP)..........................................................................................................................6
2.2.2 BLOWER................................................................................................................................................6
2.2.3 FAN........................................................................................................................................................6
2.2.4 SHROUD................................................................................................................................................7
2.3 ELECTRICAL PARTS .....................................................................................................................................7
2.3.1 MOTOR..................................................................................................................................................7
2.3.2 COMPRESSOR .....................................................................................................................................7
2.3.3 CAPACITOR ..........................................................................................................................................7
2.3.4 POWER CORD......................................................................................................................................8
2.3.5 THERMISTOR........................................................................................................................................8
2.3.6 SYNCHRONOUS MOTOR.....................................................................................................................8
2.4 REFRIGERATION CYCLE..............................................................................................................................9
2.4.1 CONDENSER ........................................................................................................................................9
2.4.2 EVAPORATOR ......................................................................................................................................9
2.4.3 CAPILLARY TUBE.................................................................................................................................9
3.
INSTALLATION
3.1 HOW TO INSTALL THE UNIT.......................................................................................................................12
3.2 HOW TO DRAIN............................................................................................................................................12
3.3
HOW TO USE THE REVERSIBLE INLET GRILLE
..................................................................................................................
12
3.4 WINDOW REQUIREMENTS.........................................................................................................................13
3.5 INSTALLATION KITS CONTENTS...............................................................................................................13
3.6 SUGGESTED TOOL REQUIREMENTS.......................................................................................................14
4.
TROUBLESHOOTING GUIDE
4.1 OUTSIDE DIMENSIONS...............................................................................................................................15
4.2 PIPING SYSTEM...........................................................................................................................................15
4.3 TROUBLESHOOTING GUIDE......................................................................................................................16
5. SCHEMATIC DIAGRAM
5.1 CIRCUIT DIAGRAM......................................................................................................................................25
5.2 ELECTRONIC CONTROL DEVICE ..............................................................................................................26
5.3
COMPONENTS LOCATION(FOR MAIN P.C.B ASM
).......................................................................................................27
5.4
COMPONENTS LOCATION(FOR DISPLAY P.C.B ASM)
.......................................................................................................27
6. EXPLODED VIEW..................................................................................................................................28
7. REPLACEMENT PARTS LIST........................................................................................................29
CONTENTS
—3—
1.1 SAFETY PRECAUTIONS
1. When servicing, set the POWER of CONTROL BOARD to Off and unplug the power cord.
2. Observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.
3. After servicing, make an insulation resistance test to prevent the customer's exposure to shock hazards.
1.2
INSULATION RESISTANCE TEST
1. Unplug the power cord and connect a jumper between 2 pins (black and white).
2. The grounding conductor (green or green and yellow) is to be open.
3. Measure the resistance value with an ohm meter between the jumpered lead and each exposed metallic part on the equipment at all Mode [except POWER OFF].
4. The value should be over 1 MΩ.
1. PREFACE
This service manual provides various service information, including the mechanical and electrical parts, etc. This room air conditioner was manufactured and assembled under a strict quality control system. The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit.
1.3 SPECIFICATIONS
POWER SUPPLY 1Ø, 208-230V, 60Hz COOLING CAPACITY (Btu/h) 14,800 INPUT (W) 1,410 RUNNING CURRENT (A) 6.5 REFRIGERANT CHARGE (g) 690(24.3 OZ)
INDOOR (°C) 26.7(DB) 19.4(WB)
OUTDOOR (°C) 35(DB) 23.9(WB) FAN, INDOOR BLOWER FAN, OUTDOOR PROPELLER TYPE FAN WITH SLINGER-RING FAN SPEEDS, FAN/COOLING 3/3 FAN MOTOR 6 POLES OPERATION CONTROL TOUCH PANEL ROOM TEMP. CONTROL THERMISTOR
VERTICAL LOUVER(RIGHT & LEFT)
HORIZONTAL LOUVER(UP & DOWN)
CONSTRUCTION SLIDE IN-OUT CHASSIS
COMPRESSORINTERNAL OVERLOAD PROTECTOR
FAN MOTORINTERNAL THERMAL PROTECTOR
1.6m (3 WIRE WITH GROUNDING)
ATTACHMENT PLUG(CORD-CONNECTED TYPE) DRAIN SYSTEM DRAIN PIPE OR SPLASHED BY FAN SLINGER NET WEIGHT (lbs/kg) 110/50 OUTSIDE DIMENSION (inch) 26 x 16
27
/32 x26
9
/16
(WxHxD) (mm) 660x428x675
LWM1430TAS/LW-136
MODELS
ITEMS
AIR DIRECTION CONTROL
PROTECTOR
POWER CORD
OPERATING TEMPERATURE
* DB:Dry Bulb
**
WB:Wet Bulb
NOTE : Specifications are subject to minor change without notice for further improvement.
1.4 FEATURES
• Designed for cooling only.
• Powerful and quiet cooling.
• Slide-in and slide-out chassis for the simple installation and service.
• Reversible inlet grille.
1.5 CONTROL LOCATIONS
• VENTILATION
The ventilation lever must be in the CLOSE position in order to maintain the best cooling conditions. When a fresh air is necessary in the room, set the ventilation lever to the OPEN position. The damper is opened and room air is exhausted.
NOTE: Before using the ventilation feature, make
the lever, as shown. First, pull down part to horizontal line with part .
Precaution: The Remote Control unit will not function
properly if strong light strikes the sensor window of the air conditioner or if there are obstacles between the Remote Control unit and the air conditioner.
POWER BUTTON
Operation starts, when this button is pressed and stops when you press the button again.
OPERATION MODE SELECTION BUTTON
Select Cooling, or Fan or Dehumidification(Dry) mode with button. (Dry mode is not to all models.)
ON/OFF TIMER BUTTON
Set the time of starting and stopping operation. The timer is set by 1 hour.
FAN SPEED SELECTOR
Select the fan speed in three steps.
-High[F3] ➔ Low[F1] ➔ Med[F2]➔ High[F3]... .
ROOM TEMPERATURE SETTING BUTTON
Control the room temperature within a range of 60°F to 86°F by 1°F.
AUTO SWING
Control the horizontal air direction by air swing system.
• Side air-intake, side cooled-air discharge.
• Built in adjustable THERMISTOR.
• Washable one-touch filter.
• Compact size.
—4—
Part A
Part B
VENTCLOSE OPEN
2
3
1
4
7
5
1
4 2
3 6
3
5
1
4 2 6
5
6
6
—5—
2.1 MECHANICAL PARTS
2.1.1 FRONT GRILLE
1. Open the inlet grille upward or downward.
2. Remove the screw which fastens the front grille.
3. Pull the front grille from the right side.
4. Remove the front grille. (See Fig. 1)
5. Re-install the component by referring to the removal procedure.
NOTE: Mark ∆ of inlet grille means opening direction.
2.1.2 CABINET
1. After disassembling the FRONT GRILLE, remove the screws which fasten the cabinet at both sides. Keep these for later use.
2. Remove the two screws which fasten the cabinet at back. (See Fig. 2)
3. Pull the base pan forward.
2.1.3 CONTROL BOX
1. Remove the front grille. (Refer to section 2.1.1)
2. Pull the base pan forward so that you can remove the 2 screws which fasten the cover control at the right side. (See Fig. 3)
3. Remove the 3 screws which fasten the control box. (See Fig. 3)
4. Discharge the capacitor by placing a 20,000 ohm resistor across the capacitor terminals.
5. Disconnect two wire housings in the control box.
6. Pull the control box forward completely.
7. Re-install the components by referring to the removal procedure. (See Fig. 3) (Refer to the circuit diagram found on page 24 in this manual and on the control box.)
2. DISASSEMBLY INSTRUCTIONS
— Before the following disassembly, POWER SWITCH is set to OFF and disconnected the power cord.
Figure 1
Figure 2
Figure 3
—6—
2.2 AIR HANDLING PARTS
2.2.1 COVER (AT THE TOP)
1. Remove the front grille. (Refer to section 2.1.1)
2. Remove the cabinet. (Refer to section 2.1.2)
3. Remove 11 screws which fasten the brace and covers.
4. Remove the covers and the brace. (See Fig. 4)
5. Re-install the components by referring to the removal procedure, above.
2.2.2 BLOWER
1. Remove the cover. (Refer to section 2.2.1)
2. Remove the 3 screws which fasten the evaporator at the left side and the top side. (See Fig. 4)
3. Move the evaporator sideward carefully.
4. Remove the orifice from the air guide carefully.
5. Remove the clamp spring which is clamped to the boss of blower by hand plier. (See Fig. 5)
6. Pull the blower outward, without touching blades. (See Fig. 6)
7. Re-install the components by referring to the removal procedure, above.
2.2.3 FAN
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the brace and shroud cover. (Refer to section 2.2.1)
3. Remove the 5 screws which fasten the condenser.
4. Move the condenser sideways carefully.
5. Remove the clamp which secures the fan.
6. Remove the fan. (See Fig. 7)
7. Re-install the components by referring to the removal procedure, above.
Figure 4
Figure 5
Figure 6
Figure 7 (a) Figure 7 (b)
—7—
2.2.4 SHROUD
1. Remove the fan. (Refer to section 2.2.3)
2. Remove the 2 screws which fasten the shroud.
3. Remove the shroud. (See Fig. 8)
4. Re-install the component by referring to the removal procedure, above.
2.3 ELECTRICAL PARTS
2.3.1 MOTOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the cover control and disconnect a wire housing in control box. (Refer to section 2.1.3)
3. Remove the blower. (Refer to section 2.2.2)
4. Remove the fan. (Refer to section 2.2.3)
5. Remove the 4 screws which fasten the motor. (See Fig. 9)
6. Remove the motor.
7. Re-install the components by referring to the removal procedure, above.
2.3.2 COMPRESSOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Discharge the refrigerant by using a Refrigerant Recovery System.
3. Disconnect the 3 leads from the compressor.
4. After purging the unit completely, unbraze the suction and discharge tubes at the compressor connections.
5. Remove the 3 nuts and the 3 washers which fasten the compressor. (See Fig. 10)
6. Remove the compressor.
7. Re-instill the components by referring to the removal procedure, above.
2.3.3 CAPACITOR
1. Remove the control box. (Refer to section 2.1.3)
2. Remove the screw which fasten the display panel.
3. Disconnect the 2 leads from the rocker switch and remove the panel.
4. Remove a screw and unfold the control box. (See Fig. 11)
5. Remove the screw and the clamp which fastens the capacitor. (See Fig. 11)
6. Disconnect all the leads of capacitor terminals.
7. Re-install the components by referring to the removal procedure, above.
Figure 8 (a) Figure 8 (b)
Figure 9
Figure 10
Figure 11
—8—
2.3.4 POWER CORD
1. Remove the control box. (Refer to section 2.1.3)
2. Unfold the control box. (Refer to section 2.3.3)
3. Disconnect the grounding screw from the control box.
4. Disconnect 2 receptacles.
5. Remove a screw which fastens the clip cord.
6. Pull the power cord. (See Fig. 12)
7. Re-install the component by referring to the removal procedure, above. (Use only one ground-marked hole for ground connection.)
8. If the supply cord of this appliance is damaged, it must be replaced by the special cord. (The special cord means the cord which has the same specification marked on the supply cord fitted to the unit.)
2.3.5 THERMISTOR
1. Remove the control box. (Refer to section 2.1.3)
2. Unfold the control box. (Refer to section 2.3.3)
3. Disconnect the thermistor terminals from main P.W.B assembly.
4. Remove the thermistor.
5. Re-install the components by referring to the removal procedure above. (See Figure 13)
2.3.6 SYNCHRONOUS MOTOR
1. Remove the control box. (Refer to section 2.1.3)
2. Unfold the control box. (Refer to section 2.3.3)
3. Remove the crankshaft.
4. Disconnect all the leads of the synchronous motor.
5. Remove the 2 screws which fasten the synchronous motor. (See Fig. 14)
6. Re-install the components by referring to the removal procedure, above.
Figure 13
Figure 12
Figure 14
—9—
2.4 REFRIGERATION CYCLE
2.4.1 CONDENSER
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the brace and the shroud cover. (Refer to section 2.2.1)
3. Remove the 5 screws which fasten the condenser.
4. After discharging the refrigerant completely, unbraze the interconnecting tube at the condenser connections.
5. Remove the condenser.
6. Re-install the components by referring to notes. (See Fig. 15)
2.4.2 EVAPORATOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the top cover and the brace. (Refer to section 2.2.1)
3. Discharge the refrigerant completely.
4. Remove the 3 screws which fasten the evaporator at the left side and the top side.
5. Move the evaporator sideward carefully and then unbraze the interconnecting tube at the evaporator connectors.
6. Remove the evaporator.
7. Re-install the components by referring to notes. (See Fig. 16)
2.4.3 CAPILLARY TUBE
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the brace. (Refer to section 2.2.1)
3. After discharging the refrigerant completely, unbraze the interconnecting tube at the capillary tube.
4. Remove the capillary tube.
5. Re-install the components by referring to notes.
Figure 15 (a)
Figure 15 (b)
Figure 16
Discharge the refrigerant system using Freon
TM
Recovery System. If there is no valve to attach the recovery system, install one (such as a WATCO A-1) before venting the Freon
TM
. Leave the valve in place
after servicing the system.
CAUTION
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