LG LWC1264QAG Window Air Conditioner Owner’s Manual

LG LWC1264QAG Window Air Conditioner

MODEL : Window

CAUTION
Before Serving the unit, read the safety precautions in the General SVC manual. Only for authorized service personnel.

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 instructions will cause harm or damage. The seriousness is classified by the following indications.

WARNING

• This symbol indicates the possibility of death or serious injury.

CAUTION

• This symbol indicates the possibility of injury or damage to properties only.

The meanings of symbols used in this manual are as shown below.

Cautions in Repair

SAFETY PRECAUTIONS

1. When servicing the unit, set the main SWITCH to OFF and remove the POWER SUPPLY cables.
2. Observe the original lead dress. If a short circuit is found, replace all parts that have been overheated or damaged by the short circuit.
3. After servicing the unit, make an insulation resistance test to protect the customer from being exposed to shock hazards.

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 & 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.
4. The value should be over 1MΩ.

Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for repair. Internal components and circuit boards are at the main potential when the equipment is connected to the power cables. This voltage is extremely dangerous and may cause death or severe injury if come in contact 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, refrigerant gas or refrigerating machine oil discharges and it Can cause injury.
• When the refrigerant gas leaks during work, execute ventilation. If the refrigerant gas touches a fire, poisonous gas is generated. A case of leakage of the refrigerant and the closed room full of gas is dangerous because a shortage of oxygen occurs. Be sure to execute ventilation.
• When removing the front panel or cabinet, execute short-circuit and discharge between high voltage capacitor terminals. If the discharge is not executed, an electric shock is caused by high voltage resulting in a death or injury.
• Do not turn the air-conditioner ON or OFF by plugging or unplugging the power plug. There is a risk of fire or electrical shock.
• 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 the control box securely. Otherwise, there is a risk of fire or electric shock due to dust, water, etc.
• Indoor/outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no force pulling the cable from the connection terminals. Improper or loose connections can cause heat generation or fire.
• Do not touch, operate, or repair the product with wet hands. Holding the plug by hand when taking it out. Otherwise, there is a risk of electric shock or fire.

CAUTION

• Do not turn on the breaker under condition that front panel and cabinet are removed.
• Be sure to earth the air conditioner with an earthing conductor connected to the earthing terminal.
• Conduct repair works after checking that the refrigerating cycle section has cooled down sufficiently. Otherwise, working on the unit, the hot refrigerating cycle section can cause burns.
• Do not tilt the unit when removing panels. Otherwise, the water inside the unit can spill and wet floor.
• Do not use the welder in a well-ventilated place. Using the welder in an enclosed room can cause oxygen deficiency.
• Be sure to turn off power switch before connecting or disconnecting connector, or parts damage may be occurred.

Inspections after Repair

WARNING

• 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 or fire.
• Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances. otherwise, it can cause an electrical shock, excessive heat generation or fire.
• Do not insert hands or other objects through the air inlet or outlet while the prod-uct is operating. There are sharp and moving parts that could cause personal injury.
• Do not block the inlet or outlet of air flow. It may cause product failure

CAUTION

• Check to see if the parts are mounted correctly and wires are connected. Improper installation and connections can cause an electric shock or an injury.
• Check the installation platform or frame has corroded. Corroded installation plat-form or frame can cause the unit to fall, resulting in injury.
• Be sure to check the earth wire is correctly connected.
• After the work has finished, be sure to do an insulation test to check the resistance is 2[Mohm] or more between the charge 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 user’s side.
• Check the drainage of the indoor unit after the repair. If drainage is faulty the water enters the room and wet the floor.

Operation

Features

• Designed for COOLING ONLY.
• Powerful and whispering cooling.
• Slide-in and slide-out chassis for the simple installation and service.
• Side air-intake, side cooled-air discharge.
• Built-in adjustable THERMOSTAT
• Washable one-touch filter
• Compact size
• Reliable and efficient rotary compressor

Control Locations Function of Controls

Cooling Only Model

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 OPEN position. The damper is opened and room air is exhausted.

THERMOSTAT
Thermostat will automatically control the temperature of the room. Select a higher number for a cooler temperature in the room. The temperature is selected by positioning the knob to the desired position. The 5 or 6 position is a normal setting for average conditions.

OPERATION

CAUTION: A slight heat odor may come from the unit when first switching to HEAT after the cooling season is over. This odor, caused by fine dust particles on the heater, will disappear quickly.

Heat Pump Model

HEATER LAMP
When the unit sets the heating operation condition, the green lamp is lit. When the frost settles on the heat exchanger of the outside, defrosting is made automatically and the green lamp is unlighted. The until it may hiss and the fan motor will stop for 1 to 10 minutes. This should not be regarded as trouble. After defrosting, the heating operation begins again.

THERMOSTAT
Turn the thermostat control to the desired setting. The central position is a normal setting for average conditions. You can change this setting, if necessary, by your temperature preference. The thermostat automatically controls cooling or heating, but the fan runs continuously whenever the air conditioner is in operation. If the room is too warm, turn the thermostat control clockwise. If the room is too cool, turn the thermostat control counterclockwise.

OPERATION

Cooling and Heating Model with Remote Control and Touch Type

DISPLAY

REMOTE CONTROL

POWER BUTTON
Operation starts when this button is pressed and stops when you press the button again.

OPERATION MODE SELECTION BUTTON
Select Cooling, Heating, or Fan mode with this button.

ON/OFF TIMER BUTTON
Set the time of starting and stopping operation. The timer is set to 1 hour.

FAN SPEED SELECTOR
Select the fan speed. Cooling Model: 3 steps {High[F3] ➔ Low[F1] ➔ Med[F2]➔ High[F3]… } Heating Model: 2 steps {High [F2] ➔ Low[F1] ➔ High[F2]… }

ROOM TEMPERATURE SETTING BUTTON
Control the room temperature within a range of 16°C to 30°C. The room temperature will be adjusted by 1°C 30min., and by 2°C 1 hour later.

SIGNAL RECEIVER

AUTO SWING
The vertical louver swings horizontally by the automatic system and stops when you press the button again.

Troubleshooting Guide

Piping System

Figure 32 is a brief description of the important components and their function in what is called the refrigeration system. This will help you to understand the refrigeration cycle and the flow of the refrigerant in the cooling cycle.

In general, possible trouble is classified into two kinds. The one is called Starting Failure which is caused by an electrical defect, and the other is ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application.

The unit runs but has poor cooling

Electrical Parts Troubleshooting Guide

LWC1264PAG/PAN/PCG, LWC1264QAG/QAS, LWC126CBHK0, LWC126CGMM0/CBMM1/LWC096CBMK0

LWC1264PBG/PHG, LWC1264VBS/QBG

Room Air Conditioner Voltage Limits

• NAMEPLATE RATING
  • 220~240±10%
• MINIMUM
  • 198V
• MAXIMUM
  • 264V

Correct if necessary.
Power supply cord| Check the voltage of the rotary switch. If none, check the power supply cord. Replace the cord if the circuit is open.
Rotary switch| Check switch continuity. Refer to the wiring diagram for terminal identification. Replace the switch if defective.
Wire disconnected or connection loose| Connect wire. Refer to the wiring diagram for terminal identification. Repair or replace loose terminal.
Capacitor (Discharge capacitor before testing.)| Test capacitor.

Replace if not within ±10% of the manufacturer’s rating. Replace if shorted, open, or damaged.

Will not rotate| Fan blade hitting shroud or blower wheel hitting scroll. Realign assembly.

Units using slinger rings for condenser fans must have 1/4 to 5/16 inch clearance to the base. If it hits the base, shim up the bottom of the fan motor with mounting screw(s).

Check fan motor bearings; if the motor shaft will not rotate, replace the motor.

The fan motor runs intermittently| Revolves on overload.| Check voltage. If not within limits, call an electrician.

Test capacitor.

Check bearings. Does the fan blade rotate freely? If not, replace the fan motor.

Pay attention to any change from high speed to

low speed. If the speed does not change, replace the motor.

Fan motor noise.| Fan| If cracked, out of balance, or partially missing, replace it.
Turbo| If cracked, out of balance, or partially missing, replace it.
Loose clamper| Tighten it.
Worn bearings| If knocking sounds continue when running or loose, replace the motor. If the motor hums or noise appears to be internal while running, replace the motor.
The compressor will not run, but the fan motor runs.| Voltage| Check voltage.

If not within limits, call an electrician.

Wiring| Check the wire connections, if loose, repair or replace the terminal. If wires are off, refer to the wiring diagram for identification, and replace. Check wire locations. If not per the wiring diagram, correct.
Rotary| Check for continuity, refer to the wiring diagram for terminal identification. Replace the switch if the circuit is open.
COMPLAINT| CAUSE| REMEDY
---|---|---
The compressor will not run, but the fan motor runs.| Thermostat| Check the position of the knob If not at the coldest setting, advance the knob to this setting and restart the unit. Check the continuity of the thermostat. Replace thermo-stat if the circuit is open.
Thermistor| Check the TEMP control. If not at the lowest number, set TEMP control to this setting and restart the unit. Check the continuity of the thermistor. Replace the thermistor if the circuit is open.
Capacitor (Discharge capacitor before servicing.)| Check the capacitor.

Replace if not within ±10% of the manufacturer’s rating. Replace if shorted, open, or damaged.

Compressor| Check the compressor for open circuit or ground. If open or grounded, replace the compressor.
Overload| Check the compressor overload, if externally mounted- ed. Replace if open. (If the compressor temperature is high, remove the overload, cool it, and retest.)
Compressor cycles on overload.| Voltage| Check the voltage.

If not within limits, call an electrician.

Overload| Check overload, if externally mounted.

Replace if open. (If the compressor temperature is high, remove the overload, cool, and retest.)

Compressor cycles on overload.| Fan motor| If not running, determine the cause. Replace if required.
Condenser air flow restriction| Remove the cabinet. inspect the interior surface of the condenser; if restricted, clean carefully with a vacuum cleaner (do not damage fins) or brush.

Clean the interior base before reassembling.

Condenser fins (damaged)| If condenser fins are closed over a large area on the coil surface, head pressures will increase, causing the compressor to overload. Straighten the fins or replace the coil.
Compressor cycles on overload.| Capacitor| Test capacitor.
Wiring| Check the terminals. If loose, repair or replace.
Refrigerating system| Check the system for a restriction.
Insufficient cooling or heating| Air filter| If restricted, clean or replace.
Exhaust damper door| Close if open.
Unit undersized| Determine if the unit is properly sized for the area to be cooled.
Excessive noise| Turbo or fan| Check the set screw or clamp. If loose or missing, correct. If the turbo or fan is hitting the air guide, rearrange the air handling parts.
Copper tubing| Remove the cabinet carefully and rearrange the tubing so as not to contact the cabinet, compressor, shroud, and barrier.

References

• below.Be
• diagram.Is
• realtime.at - Domain catched
• Repair Your Grill: Shop Replacement Parts for 24,880 Models
• Lg Air Conditioner Parts - Select From 2329 Models

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