LG LB-D1861 / LB-D2461 / LB-F3061 / LB-F3661 / LB-F3681 / LB-F4261 / LB-E4881 / LB-E6081 / LB-E6084_HL_CL_HP_CP Service Manual ▷ View online
Ceiling Duct Type
Air Conditioner
Air Conditioner
SERVICE MANUAL
MODELS: LB-D1861HL/CL/HP/CP
LB-D2461HL/CL/HP/CP
LB-F3061HL/HP
LB-F3661HL/CL/HP/CP
LB-F3681HL/CL/HP/CP
LB-F4261HL/HP
LB-E4881HL/CL/HP/CP
LB-E6081HL/CL/HP/CP
LB-E6084HL
LB-F3061HL/HP
LB-F3661HL/CL/HP/CP
LB-F3681HL/CL/HP/CP
LB-F4261HL/HP
LB-E4881HL/CL/HP/CP
LB-E6081HL/CL/HP/CP
LB-E6084HL
Contents
Functions .................................................................................................................................3
Product Specifications (Cooling & Heating) ..........................................................................5
Dimensions ..............................................................................................................................9
Refrigeration Cycle Diagram ................................................................................................11
Wiring Diagram ......................................................................................................................13
Operation Details ...................................................................................................................19
Installation of Indoor, Outdoor Unit .....................................................................................22
Cycle ........................................................................................................................................36
Cycle Troubleshooting Guide ...............................................................................................39
Electronic Parts Troubleshooting Guide .............................................................................40
Electronic Control Device .....................................................................................................43
Exploded View and Replacement Parts List .......................................................................44
–2–
Functions
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
Auto Operation(Auto Change Over)
Deice (defrost) control (Heating)
Auto Restart
–3–
Hot-start Control (Heating)
• The indoor fan stops until the evaporator piping tempera-
ture will be reached at 28°C.
High head height Drain pump(Optional)
• A standard drain-head height of up to 700mm is possible.
Central Control(Optional)
• It is operating individually or totally by central control function.
Group Control(Optional Wiring)
• Each controller can control 16 units and 8 controllers can connect.
• It operates maximum 16 units by only one wired remote con-
• It operates maximum 16 units by only one wired remote con-
troller and each unit starts random to prevent overcurrent.
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temp.
• Indoor fan is delayed for 5 seconds at the starting.
• Restarting is inhibited for approx. 3 minutes.
• High, Med, Low
• Intermittent operation of fan at low speed.
• Although the air-conditioner is turned off by a power failure, it is restarted automati-
cally previous operation mode after power supply.
• The setting temperature and desired operation mode are auto-
matically set by fuzzy rule.
• Both the indoor and outdoor fan stops during defrosting.
• Hot start after defrost ends.
• Hot start after defrost ends.
–4–
Remote Controller
Operation ON/OFF
Operation Mode Selection
Fan Speed Selection
Room Temperature Display
Temperature Setting
Setting the Timer
Weekly Program
(Cooling
model only)
(Heating
model only)
(Low)
(Med)
(High)
Cooling Operation Mode ( )
Heating Operation Mode ( )
Heating Operation Mode ( )
Auto Operation Mode ( )
Soft Dry Operation Mode ( )
Fan Operation Mode
HI
AUTO
MED
LO
Program
Holiday
SET/CLR
Min
Hour
Week
Timer
Cancel
Timer
Cancel
(Except LB-E6084HL)
: High:39°C
↔
LOW:11°C
: Fan Operates without cooling & heating
Cooling
Heating
Down to 18°C
Up to 30°C
Up to 30°C
Down to 16°C
Up to 30°C
Up to 30°C
