LG LB-F4280HL / LB-F4280CL Service Manual ▷ View online
SERVICE MANUAL
Ceiling Duct Type
Air Conditioner
Air Conditioner
MODEL: LB-F4280HL/CL
Contents
Functions
3
Product Specifications
5
Dimensions
6
Refrigeration Cycle Diagram
7
Wiring Diagram
9
Operation Details
11
Installation of Indoor, Outdoor Unit
14
Test Running
25
3-way Valve
27
Cycle Troubleshooting Guide
32
Electronic Parts Troubleshooting Guide
33
Electronic Control Device
36
Schematic Diagram
37
Exploded View and Replacement Parts List
38
–2–
Functions
ƒU
Room temperature sensor. (Thermistor)
ƒU
Maintains the room temperature in accordance with the Setting Temp.
ƒU
Indoor fan is delayed for 5 seconds at the starting.
ƒU
Restarting is inhibited for approx. 3 minutes.
ƒU
High, Med, Low
ƒU
Intermittent operation of fan at low speed.
ƒU
Both the indoor and outdoor fan stops during defrosting.
ƒU
Hot start after defrost ends.
ƒU
The indoor fan stops until the evaporator piping temperature will be reached at 28°C.
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Time Delay Safety Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Deice (defrost) control (Heating)
Hot-start Control (Heating)
–3–
–4–
Remote Controller
Operation ON/OFF
Operation Mode Selection
Fan Speed Selection
Room Temperature Display
Temperature Setting
Setting the Time or Timer
(Cooling
model only)
(Heat pump
model only)
(Low)
(Med)
(High)
Cooling Operation Mode ( )
Heating Operation Mode ( )
Heating Operation Mode ( )
Soft Dry Operation Mode ( )
Fan Operation Mode
HI
MED
LO
Set
: High:39°C
¡Œ
LOW:11°C
: Fan Operates without cooling & heating
Although the air conditioner is turned off by a power failure, it is restarted
automatically after a power resupply.
automatically after a power resupply.
Cooling
Heating
Down to 18°C
Up to 30°C
,
Down to 16°C
Up to 30°C
,
✔