LB-F4280HL, LB-F4280CL — LG Air Conditioner Service Manual (repair manual)

Model
LB-F4280HL LB-F4280CL
Pages
42
Size
916.15 KB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
lb-f4280hl-lb-f4280cl.zip
Date

View LG LB-F4280HL / LB-F4280CL Service Manual online

SERVICE MANUAL
Ceiling Duct Type
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 (       )
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.
Cooling
Heating 
Down to 18°C
Up to 30°C
,
Down to 16°C
Up to 30°C
,
Page of 42
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Download LG LB-F4280HL / LB-F4280CL Service Manual (Repair Manual)

Here you can view online or download LG LB-F4280HL / LB-F4280CL Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair LG LB-F4280HL / LB-F4280CL Air Conditioner. Information contained in LG LB-F4280HL / LB-F4280CL service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).