LG LM-1860HL Service Manual ▷ View online
- 9 -
Refrigeration Cycle Diagram
INDOOR UNIT
HEAT
EXCHANGE
(EVAPORATOR)
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(CONDENSER)
COMPRESSOR
B
A
COMPRESSOR
GAS SIDE
B-
UNIT
UNIT
A-
UNIT
UNIT
CAPILLARY TUBE
LIQUID SIDE
3-WAY VALVE
3-WAY VALVE
OUTDOOR UNIT
MODEL
LM-1860CL/
LM-1860HL
Pipe size(Diameter: in)
Gas
Liquid
3/8"
1/4"
Max.
Max.
Piping length
Elevation
A (m)
B (m)
7
5
(1) LM-1860CL
(2) LM-1860HL
INDOOR UNIT
3-WAY
VALVE
VALVE
3-WAY
VALVE
VALVE
GAS
SIDE
4-WAY
VALVE
VALVE
4-WAY
VALVE
VALVE
COMPRESSOR-B
COOLING
HEATING
DEICE
HEATING
DEICE
COMPRESSOR-A
CAPILLARY TUBE
CAPILLARY TUBE
HEAT
EXCHANGER
UNIT-A
UNIT-B
LIQUID
SIDE
HEAT
EXCHANGER
OUTDOOR UNIT
- 10 -
Wiring Diagram
(1) LM-1860CL
1. Indoor Unit
2. Outdoor Unit
YL
YL
R
R
R
S
S
S
C
C
C
RD
COMP
COMP
"A"
CAP
ACIT
OR
CAP
ACIT
OR
CAPACITOR
O.LP
O.L.P
BR
BR BR
BR
"B"
BL
BL
WH
MOTOR
BK
BK
BK
BK
GN/YL
GN
TP
RD
WH
WH
1(L)
1(L)
2(N)
1(L) 2(N)
2(N)
3
3
4
POWER CORD
3854AR3338A
A-UNIT
B-UNIT
TO INDOOR UNIT
TERMINAL
BROCK
WH
BK
RD
BK
BR
RY-FAN
RD
BR
YL
YL
OR
BL
SSR-L
SSR-M
SSR-H
FUSE T2A
SH-CAPA
MOTOR
STEP
MOTOR
PILLAR
TO OUTDOOR UNIT
3854AR3338B
CN-TRANS
THERMISTOR
RY-COMP
DISPLAY PCCB ASM
CN-4W
A
Y
GN/YL
CN-POWER
CN-AC/DC
CN-UP/DOWN
CN-TH
CN-F
AN
AC PCB
ACM
TERMINAL
FORCED
OPERATION
SWITCH
TRANS-
FORMER
INDOOR WRING DIAGRAM
DC PCB
ASM
1
3
4
5
2
(N)
(L)
CN-DISP
YL
YL
R
R
R
S
S
S
C
C
C
RD
RD
COMP
COMP
"A"
CAP
ACIT
OR
CAP
ACIT
OR
CAPACITOR
O.LP
O.L.P
BR
BR
BR
BR
BR
"B"
BL
BL
WH
MOTOR
BK
BK
BK
BK
BK
BK
TP
WH
1(L)
1(L) 2(N)
2(N)
POWER CORD
3854AR3343B
A-UNIT
B-UNIT
TO INDOOR UNIT
TERMINAL
BLOCK
BK
GN/YL
GN/YL
5
5
4
4
3
3
T/B
2 1
R/VALVE"A"
R/VALVE"B"
- 11 -
(2) LM-1860HL
1. Indoor Unit
2. Outdoor Unit
(1) The function of main control
1. Time Delay Safety Control
• 3min... The compressor is ceased for 3 minutes to balance the pressure in the refrigeration cycle.
(Protection of compressor)
• 2sec... The indoor fan is ceased for 2 sec. to prevent relay noise.
(Protection of fan relay and micro chip)
• 30sec... The 4-way valve is ceased for 30 sec. to prevent the refrigerant-gas abnormal noise when the
Heating operation is OFF or switched to the other operation mode.
2. Airflow Direction Control
• This function is to swing the louver up and down automatically and to set it at the desired position.
• The procedure is as the following.
1st ; Press the ON/OFF Button to operate the product.
2nd ; Press the Airflow Direction Control Button to swing the louver up and down automatically.
3rd ; Repress the Airflow Direction Control Button to set the louver as the desired position.
3. Cooling Mode Operation
• When selecting the Cooling(
) Mode Operation, the unit will operate according to the setting by the
remote controller and the operation diagram is as following.
4. Cooling or Heating Mode with Sleep Mode Auto Operation
• When selecting the Cooling(
) or the Heating( ) combined with the Sleep Mode Auto Operation( ),
the operation diagram is as following.
- 12 -
Operation Details
0
1
2
3
4
5
6
7
110
°
7
°
8 (Close)
Cooling
Cooling
Cooling
Approx.28
°
Approx.28
°
Heating
Horizontal
Setting point :
Setting range for :
Heating
Heating
Intake Air temp.
COMP. ON
(SET TEMP. +0.5°C)
(SET TEMP. +0.5°C)
COMP. OFF
(SET TEMP. -0.5°C)
(SET TEMP. -0.5°C)
Selecting
fan speed
fan speed
Selecting
fan speed
fan speed
More than
3 minutes
More than
3 minutes
Selecting
fan speed
fan speed
COMPRESSOR
ON
OFF
ON
OFF
ON
INDOOR FAN
Low
Low
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