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Model
LM-1966C2L_M LM-1966H2L_M LM-2166H2L_M LM-2065C3L_M
Pages
71
Size
2.45 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
lm-1966c2l-m-lm-1966h2l-m-lm-2166h2l-m-lm-2065c3l-.zip
Date

LG LM-1966C2L_M / LM-1966H2L_M / LM-2166H2L_M / LM-2065C3L_M Service Manual ▷ View online

Display Function 
1. Heating Model
2. Cooling Model
• Cooling, Soft Dry, Fan, Heating
•  Cooling, Soft Dry, Fan
• Sleep Mode 
•  Sleep Mode
• Timer Mode 
•  Timer Mode 
• Hot-start, Defrost
Self-diagnosis Function
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 manner as the following table.
• If more than two troubles occur simultaneously, primarily the highest trouble fo error code is expressed.
• After error occurrence, if error is released, error LED is also released simultaneously.
• To operate again on the occurrence of error code 12, be sure to pull out power cord and then re-insert.
• Having or not of error code is different from Model.
Operation Indicator
Timer Indicator 
Sleep Timer Indicator 
Defrost Indicator
-22-
Operation Indicator
Timer Indicator 
Sleep Timer Indicator
Compressor on Indicator
OUT
DOOR
1
(once)
(once)
(twice)
(twice)
(5times)
(once)
(twice)
(3times)
3sec
3sec
3sec
3sec
3sec
3sec
3sec
3sec
3sec
3sec
3sec
2
3
5
12
Error
Code
Error LED
(Indoor body operation LED)
Error contents
SVC check point
• Indoor suction temperature 
thermistor open/short.
• Indoor pipe temperature 
thermistor open/short.
• Indoor TH ass'y check
• Outdoor TH ass'y 
check
• Resetting of remocon 
operating mode
• Communication 
line/circuit check
• Primarily check 
refrigerant pressure
• Connecting pipe check
• Connecting cable check
• Outdoor suction temperature 
thermistor open/short.
• Outdoor pipe temperature 
thermistor open/short.
• Abnormal operation of multi 
product. 
(Simultanueous operation of 
cooling and heating)
• Misconnection of connecting 
cables
• Poor communication
- 23 -
Installation
Front
Right
Rear right
Rear left
Down right
Left
More than 5 cm
More than eye-level
More than
5 cm
More than
5 cm
More than 10 cm
More than 10 cm
More than 70 cm
A
B
Indoor unit
Outdoor unit
1) Selection of the best location
1. Indoor unit
• 
There should not be any heat source or steam
near the unit.
• There should not be any obstacles to prevent
the air circulation.
• A place where air circulation in the room will be
good.
• A place where drainage can be easily obtained.
• A place where noise prevention is taken into
consideration.
• Do not install the unit near the door way.
• Ensure the spaces indicated by arrows from
the wall, ceiling, fence, or other obstacles.
2. Outdoor unit
• If an awning is built over the unit to prevent
direct sunlight or rain exposure, be careful that
heat radiation from the condenser is not
restricted.
• There should not be any animals or plants
which could be affected by hot air discharged.
• Ensure the spaces indicated by arrows from
the wall, ceiling, fence, or other obstacles.
3. Piping length and the elevation
Pipe Size
GAS
LIQUID
Max. piping
length
A (m)
Max.
Elevation
B (m)
1/2"(3/8")
1/4"
10~15
5~7
(1) Installation of Indoor, Outdoor unit
- 32 -
Connecting cable
2) Connect the cable to the indoor unit
1. Connect the wires to the terminals on the
control board individually according to the
outdoor unit connection.
• Ensure that the color of the wires of  outdoor
unit and the terminal No. are the same as
those of indoor unit respectively.
2. Attach the Grille onto the cabinet.
• Grasp lower the left and right side of the
Grille and engage four tabs on the top inside
edge of the chassis.
• Press the Grille toward the chassis until it will
be back into place.
1(L)
1(L)
2(N)
2(N)
1(L) 2(N)
3
3
Terminal on the OUTDOOR UNIT
Terminal on the OUTDOOR UNIT
Terminal on the INDOOR UNIT
A-UNIT
Terminal on the INDOOR UNIT
A-UNIT
Terminal on the INDOOR UNIT
Power cord
Power cord
B-UNIT
Terminal on the INDOOR UNIT
B-UNIT
Terminal on the INDOOR UNIT
C-UNIT
3
3
1(L) 2(N)
3
1(L) 2(N)
3
2(N)
1(L)
1(L)
2(N)
1(L)
2(N)
3
3
1(L)
2(N)
3
3
2(N)
2(N)
1(L)
1(L)
Taping
Drain hose
Pipings
Connecting 
cable
Plastic band
• Trap is required to prevent water from 
  entering into electrical parts.
Power cord
- 33 -
Seal a small opening
around the pipings
with gum type sealer. 
Trap
Trap
3) Form the pipings
1. Wrap the connecting portion of indoor unit
with the Insulation material and secure it with
two Plastic Bands(for the left pipings).
• If you want to connect an additional drain hose,
the end of the drain-outlet should keep distance
from the ground.(Do not dip it into water, and fix
it on the wall to avoid swinging in the wind.)
2. Tape the Pipings, drain hose and Connecting
Cable from down to up.
3. Form the pipings gathered by taping along the
exterior wall and fix it onto the wall by saddle
or equivalent.
1. Tape the Pipings and Connectiong cable from
down to up.
2. Form the pipings gathered by taping along the
exterior wall and the Trap to be required to
prevent the room from entering the water.
3. Fix the pipings onto the wall by saddle or
equivalent.
In case of the Outdoor unit is installed bellow
position of the Indoor unit.
In case of the Outdoor unit is installed upper
position of the Indoor unit.
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