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BK
RD
R
C
O.L.P
BR
RD
WH
A-UNIT
TO INDOOR UNIT
OUTDOOR WIRING DIAGRAM
3854A20023A
B-UNIT
MAIN POWER
1(L) 2(N) 3 3 2(N) 1(L) 1(L) 2(N)
BK RD
BL
BL
BL
RD
POWER
RELAY
RELAY
OR
OR
MOTOR
YL
BK
O.L.P
T/B 3
T/B 4
T/B 1
T/B 2
C
R
FC
H
S
WH
BL
BR
BK
COMP
"B"
CAPACITOR
NO
NC
C
3
6
1
7
8
BK
WH
BK
BK
TERMINAL
BLOCK
GN/YL
GN/YL
S
COMP
"A"
YL
CAPACITOR
OUTDOOR WIRING DIAGRAM
3854AP3911C
MAIN PCB ASSY
TO INDOOR UNIT
A-UNIT
B-UNIT
MAIN
POWER
POWER
TERMINAL
BLOCK
BLOCK
CN-TRANS
BK
BK
BR
BL
BL
YL
BK
BK
BK
BK
BK
BK
OR
H
C
F
YL
BK
BK
"A"
COMP
BL
BK
RD
RD
S
R
C
OLP
C
R BR
BK
YL
S
BK
BK
T/B2
T/B1
T/B3
GN/YL
MOTOR
BK
7
4
3
3
1
1
3
2
1
5
3
1
3
1
BK
WH
WH
BK
GN/YL
GN/YL
WH
CN-COM
CN-TH1 CN-TH2
CN-POWER
CN-SV
RY
9
RY
3
RY
2
RY
1
R
Y10
CN-FAN
CN-COMP
CAPA.
CAP
A
.
FUSE T3.15A
THERMISTOR
THERMISTOR
TRANS-
FORMER
FORMER
OLP
"B"
COMP
1(L)
1(L)
2(N)
1(L) 2(N)
2(N)
3
3
A 4-W
A
Y
B 4-W
A
Y
OPTION
BK
T/B1
BK
CAPA.
CAPA.
RY1
RY2
RY3
RY7
RY8
CN-TH2
CN-SV
CN-TH1
F
C
H
3
1
3
1
BK
BK
BL
BK
T/B2
BL
BL BL
WH
BR
BL
RD WH
GN/YL
TERMINAL
BLOCK
WH
BK
WH
BK
BK
BK
RD
BK
BK
BR
YL
YL
GN/YL
OR
RD
S
S
R
R
C
C
BK
RD
BL
CN-FAN
CN-COMP
BK
"B"
COMP
"A"
COMP
MOTOR
3
4
7
5
3
1
1
3
2
1
FUSE T3.15A
CN-POWER
CN-COM
MAIN PCB ASSY
CN-TRANS
TRANS-
FORMER
B S.V
C S.V
1(L) 2(N) 3 3 2(N) 1(L) 3 1(L) 2(N)
A-UNIT
B-UNIT
TO INDOOR UNIT
C-UNIT
MAIN
POWER
OUTDOOR WIRING DIAGRAM
3854A30076G
T/B3
OLP
OLP
MOTOR
B/P1 S
.V
OUTDOOR WIRING DIAGRAM
3854A20075Y
MAIN PCB ASSY
TO INDOOR UNIT
A-UNIT
B-UNIT
C-UNIT
MAIN
POWER
TERMINAL
BLOCK
BLOCK
CN-TRANS
BK
BR
BL
BK
BK
BK
BR
"B"
COMP
RD
BK
BK
WH RD
BL
YL
BL
BL
BL
BK
BK
BL
BL BL
BK
BK
BL
YL
S
R
C
C
R
BK
BK
RD
S
BK
BK
YL
OR
BK(Hi)
BK
T/B2
T/B3
T/B1
T/B4
7
1
3
3
1
5
3
1
3
1
BK
WH
BK
WH
RD
WH
BK
GN/YL
CN-COM
CN-TH1 CN-TH2
CN-POWER
R
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R
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CN-BYPASS
CN-COMP
CAP
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CAP
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FUSE T3.15A
THERMISTOR
THERMISTOR
TRANS-
FORMER
FORMER
1
2
"A"
COMP
1(L)
1(L)
2(N)
1(L) 2(N)
2(N)
3
3
3
HC
F
B-S
.V
C-S
.V
A 4-W
A
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B 4-W
A
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4
3
2
1
CN-SV
- 16 -
Wiring Diagram(Outdoor Unit)
1. LM-1966C2L/M
2. LM-1966H2L/M, LM-2166H2L/M
3. LM-2065C3L/M
4. LM-3065H3L/M
Operation Details
1. MAIN UNIT FUNCTION
• DISPLAY
1) C/O Model
Operation Indicator
• On while in appliance operation, off while in appliance pause
• Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)
• Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)
Sleep Timer Indicator
• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause
Timer Indicator
• On while in timer mode (on/off), off when timer mode is completed or canceled.
Comp. Running Incidator
• While in appliance operation, on while in outdoor unit compressor running, off while in compressor off
2) H/P Model
Operation Indicator
• On while in appliance operation, off while in appliance pause
• Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)
• Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)
Sleep Timer Indicator
• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause
Timer Indicator
• On while in timer mode (on/off), off when timer mode is completed or canceled
Defrost Indicator
• Off except when hot start during heating mode operation or while in defrost control
■
Cooling Mode Operation
• When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan
stop.
• When it reaches 0.5°C above the setting temp, they start to operate again.
Compressor ON Temp
➲
Setting Temp+0.5°C
Compressor OFF Temp
➲
Setting Temp-0.5°C
• While in compressor running, operating with the airflow speed set by the remote control. While in compressor
not running, operating with the low airflow speed regardless of the setting.
■
Healthy Dehumidification Mode
• When the dehumidification operation input by the remote control is received, the intake air temperature is
detected and the setting temp is automatically set according to the intake air temperature.
26°C
≤
Intake Air Temp
➲
25°C
24°C
≤
Intake Intake Air Temp<26°C
➲
Intake Air Temp-1°C
18°C
≤
Intake Intake Air Temp<24°C
➲
Intake Air Temp-0.5°C
Intake Air Temp<18°C
➲
18°C
-17-
• While in compressor off, the indoor fan repeats low airflow speed and pause.
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidifica-
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidifica-
tion operation and 4-min compressor off repeat.
Compressor ON Temp.
➲
Setting Temp+0.5°C
Compressor OFF Temp.
➲
Setting Temp-0.5°C
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
■
Heating Mode Operation(H/P model)
• When the intake air temp reaches +3°…above the setting temp, the compressor is turned off. When below
the setting temp, the compressor is turned on.
Compressor ON Temp.
➲
Setting Temp.
Compressor OFF Temp.
➲
Setting Temp.+3°C
• While in compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C, when above 28°C , it
operates with the low or setting airflow speed. When the indoor pipe temp is between 20°C and 28°C, it oper-
ates with Super-Low(while in sleep mode, with the medium airflow speed).
ates with Super-Low(while in sleep mode, with the medium airflow speed).
• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C, when above 35°C , it
operates with the low airflow speed.
• If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the
outdoor fan is turned on/off according to the indoor pipe temp.
• While in defrost control, both of the indoor and outdoor fans are turned off.
■
Defrost Control(H/P model)
• Defrost operation is controlled by timer and sensing temperature of outdoor pipe.
• The first defrost starts only when the outdoor pipe temperature falls below -6°C after 60 minutes passed from
• The first defrost starts only when the outdoor pipe temperature falls below -6°C after 60 minutes passed from
starting of heating operation and more than 10 minutes operation of compressor.
• Defrost ends after 12 minutes passed from starting of defrost operation or after the outdoor fan operates with-
in max. 2 minutes 30 seconds when the outdoor pipe temperature rises over 12°C even it before 12 minutes.
• The second defrost starts only when the outdoor pipe temperature falls below -6°C after 60 minutes passed
from ending of the first defrost and more than 10 minutes operation of compressor.
■
Cooling overload(except : LM-1966C2L/M)
• Control indoor fan by sensing outdoor pipe temperature.
• One step down from setting fan speed if pipe temperature is oven 50°C and if below 45°C, operate on setting
• One step down from setting fan speed if pipe temperature is oven 50°C and if below 45°C, operate on setting
temperature.
■
Heating overload(H/P models)
• Outdoor fan ON/OFF by sensing outdoor pipe temperature.
• Outdoor fan is OFF if pipe temperature is over 6.5°C and outdoor fan is ON if pipe temperature is below 0°C.
• Outdoor fan is off if any one part is heating overload condition.
• Outdoor fan is OFF if pipe temperature is over 6.5°C and outdoor fan is ON if pipe temperature is below 0°C.
• Outdoor fan is off if any one part is heating overload condition.
-18-
-19-
■
Fuzzy Operation (C/O Model)
• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting
temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.
Compressor ON Temp
➲
Setting Temp + 0.5°C
Compressor OFF Temp
➲
Setting Temp + 0.5°C
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
26°C
≤
Intake Air Temp
➲
25°C
24°C
≤
Intake Air Temp < 26°C
➲
Intake Air Temp + 1°C
22°C
≤
Intake Air Temp < 24°C
➲
Intake Air Temp + 0.5°C
18°C
≤
Intake Air Temp < 22°C
➲
Intake Air Temp
Intake Air Temp<18°C
➲
18°C
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the
temperature.
■
Fuzzy Operation (H/P Model)
• When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since
the operation off, the operation mode is selected.
• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only
the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air
temp at that moment as follows.
temp at that moment as follows.
24°C
≤
Inatake Air Temp
➲
Fuzzy Operation for Cooling
21°C
≤
Inatake Air Temp<24°C
➲
Fuzzy Operation for Dehumidification
Inatake Air Temp<21°C
➲
Fuzzy Operation for Heating
• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10
sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.
1) Fuzzy Operation for Cooling
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below
the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor
is turned on.
is turned on.
Compressor ON Temp
➲
Setting Temp +0.5°C
Compressor OFF Temp
➲
Setting Temp + 0.5°C
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
26°C
≤
Intake Air Temp
➲
25°C
24°C
≤
Intake Air Temp<26°C
➲
Intake Air Temp + 1°C
22°C
≤
Intake Air Temp<24°C
➲
Intake Air Temp + 0.5°C
18°C
≤
Intake Air Temp<22°C
➲
Intake Air Temp
Intake Air Temp<18°C
➲
18°C
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the tem-
perature.
Click on the first or last page to see other LM-1966C2L_M / LM-1966H2L_M / LM-2166H2L_M / LM-2065C3L_M / LM-3065H3L_M service manuals if exist.