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Owners Manual - Page 1
... and thoroughly before installing and operating your room air conditioner.
• Please retain this air-conditioning unit must be submitted for future reference after reading it thoroughly. ENGLISH
website http://www.lgservice.com
LG
LG Cassette-Type Air Conditioner
OWNER'S MANUAL
Prior to installation, this owner's manual for approval by the utility service which provides electricity...
Owners Manual - Page 2
... replacement parts. • Installation work shall be performed by qualified and authorized personnel only.
2 Cassette- You'll find them on a label on your air conditioner properly. Type Air Conditioner Cassette- Type Air Conditioner Owner's Manual
TABLE OF CONTENTS
Safety Precautions 3 Operating Instructions...........8 Maintenance and Service ....23
FOR YOUR RECORDS
Write the model...
Owners Manual - Page 22
... previous operating conditions.
Operating Instructions
Forced Operation
Operation procedures when the remote control can select the fan speed in four steps-low, medium, high or Auto. Operation will respond with door of wired remote controller at the same time for 2 seconds. Type Air Conditioner PLASMA Purification Operation
AUTO SWING OPERATION
SET TEMP Room Temp
FAN...
Owners Manual - Page 25
..., and 6% of the electricity used to operate the air conditioner will dry out the internal mechanisms.
2 Turn off the breaker
when the air conditioner is not going to be used for a long time.
Owner's Manual 25 When the air conditioner is to be used again.
1 Clean the air filter and install it .)
2
Check that the doors and windows are...
Service Manual - Page 4
... instruction will cause harm or damage. I Installation
Do not use a defective or under- This symbol indicates the possibility of fire or electric shock.
4 Ceiling Cassette Air Conditioner
Do not modify or extend the power cable.
• There is risk of fire or electric shock. rated circuit breaker. Always install a dedicated circuit and breaker.
• Improper wiring...
Service Manual - Page 23
... for M10 (accessory) Ceiling board
Ceiling
Air Conditioner body
Ceiling board
Flat washer for M10 (accessory)
Nut (W3/8 or M10)
Paper model for installation
Adjust the same height
Set screw of paper model (4 pieces)
Open the ceiling board along the outer edge of the unit is option.
Indoor
Wall Outdoor
5~7mm (0.20~0.28inch)
Service Manual 23 2. Hanging Bolt -
Service Manual - Page 29
... and discharge air.
2. Operate the unit for the air conditioner. As for the method of
wiring, be caused by the circuit diagram pasted on the name plate. 7) Confirm that the starting power is required.
2. Ensure the difference between power source and the unit. 3) The screw which fasten the wiring in the power sources specification. (Particularly note...
Service Manual - Page 30
...cooling mode, room temperature is controlled by the main body sensor. • To control the room temperature by a wired remote controller, install controller(room temp. sensor) to set position. Slide switch for 2 Thermistor
1 2 3
1
1 2 3
2
3
(4) Close the rear cover...temperature more accurately. • Maunfactured in the position 3.
30 Ceiling Cassette Air Conditioner Installation
9.
Service Manual - Page 32
...
Current
: near the rated cur- Difference Operating Current
Temp. rated current
Temp. Troubleshooting Guide
Troubleshooting Guide
Cycle Troubleshooting Guide
Trouble analysis
1. When the room air humidity is relatively higher, temperature difference is usually 4.5~6.0 kg/cm2G at the beginning of refrigerant(Leakage) Clogging
Description
Current is low.
rent
Excessive amount of...
Service Manual - Page 33
...
Turn on the main power again. Is the voltage of indoor unit and terminal block? Check the Fuse of wires
Check the diagram wiring on
Service Manual 33
Refer to the self-diagnosis function. Electronic Parts Troubleshooting Guide
Trouble 1 The Product doesn't operate at three minutes after main power turning on the control panel Check the main power...
Service Manual - Page 38
... OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF
38 Ceiling Cassette Air Conditioner Troubleshooting Guide
Self-diagnosis Function
I Error Indicator
• The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble. • Error mark is ON/OFF for the operation LED of evaporator body in the same...
Service Manual - Page 39
...Service Manual 39 If the resistance of the sensor is 10KΩ/ 5KΩ at 25°C(77°F) (plugged)
10kΩ Ω
2.5Vdc V
Check the resistance
Check the voltage
Check Point
1. Troubleshooting Guide
Troubleshooting CH01, CH02, CH06
Display code
01
Title Indoor air sensor
Cause of error... then sensor is abnormal. ¡ Repair or Change the PCB.
Plug the sensor on...
Service Manual - Page 40
... the soldering state of installation
40 Ceiling Cassette Air Conditioner Check the volt.
Check the wire connection. (Open / Short) ¡ Repair the connection 2. Of main PCB power source. (DC 12V, DC 5V) ¡ Repair or Change the main PCB. 4.
Troubleshooting Guide
Troubleshooting CH03
Display code
Title
Cause of error
03
Communication Wired R/C
• Open / Short •...
Service Manual - Page 42
... normally, outdoor PCB is no problem. ¡ Check the another indoor unit. * CH05 is displayed at outdoor unit.
42 Ceiling Cassette Air Conditioner Check the input power AC230V. (Outdoor, Indoor unit) 2. Check the resistance between communication line and GND. (Normal : Over 2MΩ) 4. Troubleshooting Guide
Troubleshooting CH05, CH53
Display code
Title
05
/
Communication
53...
Service Manual - Page 45
Service Manual 45 Troubleshooting Guide
Troubleshooting CH41, CH44, CH45, CH46, CH47, CH65
Display code
Title
41 D-pipe sensor (Inverter)
Cause of the sensor is 0 V or 5Vdc, then sensor is abnormal. If the resistance of the sensor is 0 kΩ or ∞, then sensor is abnormal.
Ω
If the voltage of error
• Open / Short • Soldered poorly • Internal...
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