LG LS-J0761NL_NM_NN / LS-J0962NL_NM_NN / LS-L1261NL_NM_NN Service Manual ▷ View online
18 . Defrosting control
• While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing,
reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit.
• Defrosting control is available 50 minutes later since heating cycle started and the pipe temperature of out-
door unit reaches below -6°C.
-25-
50 min
Setting frequency
Setting speed
Setting
speed
OFF
OFF
ON
OFF
OFF(Cooling cycle)
Setting
frequency
30 sec
Fc-1 step
Operating
frequency
of compressor
frequency
of compressor
4 Way valve
Outdoor fan
Indoor fan
Defrost LED
Fc-1
Fh+1
OFF
ON
ON(Heating cycle)
ON
ON
Low
(FhMAX-2 or
FhMAX-3)
30 sec
30 sec
8 min or
over 25˚C(120sec)
30 sec
1 min
■
How to operate the power display (LS-_NL Series)
• It must be displayed the power level that will be operating frequency of compressor.
• It indicates power levels that compressor operating frequency is controlled to depend on indoor and outdoor
• It indicates power levels that compressor operating frequency is controlled to depend on indoor and outdoor
conditions.
• It is displayed as below.
❐
Heat mode operation
- Power level 1: below Step 3 of COMP. operating frequency
- Power level 2: below Step 6 of COMP. operating frequency
- Power level 3: below Step 10 of COMP. operating frequency
- Power level 4: below Step 14 of COMP. operating frequency
- Power level 5: over Step 14 of COMP. operating frequency
- Power level 2: below Step 6 of COMP. operating frequency
- Power level 3: below Step 10 of COMP. operating frequency
- Power level 4: below Step 14 of COMP. operating frequency
- Power level 5: over Step 14 of COMP. operating frequency
❐
Operation mode except heat mode operation
- Power level 1: below Step 2 of COMP. operating frequency
- Power level 2: below Step 8 of COMP. operating frequency
- Power level 3: below Step 10 of COMP. operating frequency
- Power level 4: below Step 12 of COMP. operating frequency
- Power level 5: over Step 12 of COMP. operating frequency
- Power level 2: below Step 8 of COMP. operating frequency
- Power level 3: below Step 10 of COMP. operating frequency
- Power level 4: below Step 12 of COMP. operating frequency
- Power level 5: over Step 12 of COMP. operating frequency
-12-
Power Level 1
Power Level 2
Power Level 3
Power Level 4
Power Level 5
-13-
2. Protection of the evaporator pipe from frosting
• If the indoor pipe temperaure is below 0°C in 7 min. after the compressor operates without pause while in
cooling cycle operation mode,
➔
compressor, outdoor fan are turned off.
• When indoor pipe temp. is 7°C or higher after 2 min pause of compressor
➔
compressor, outdoor fan is turned on according to the condition of the room temperature.
3. Protection of the indoor fan from droplet formation (Enclosure
sweat and condensed disposal test)
• Control condition : The system operates standard operation without this condition as follows.
- Setting temperature <25°C
- Indoor fan speed
- Indoor fan speed
≤
low speed
- Outdoor temperature < 31°C
• Control method
- Operation frequency of compressor must be below
➃
(refer to the comp. Freq. table)
- The indoor fan operates at medium speed.
Comp. free
Comp. off
0˚C
7˚C
Indoor pipe
temp.
temp.
Comp. free
Comp. Step 4
3˚C
3
°
C
Indoor pipe
temp.
temp.
-14-
4. Cooling mode operation
• Operating frequency of compressor depend on the difference of the temperature.
(= intake air Temp.- Compressor off Temp.
• Compressor off temp.= setting temp. -0.5°C
on temp. = setting temp. +0.5°C
• If compressor operates at some operating frequency, the operating frequency of compressor cannot be
changed within 30 seconds.
• Condition of compressor turned off
- When intake air temperature stay at the temperature between setting temp. -0.5°C and setting temp.
-1.0°C for 3 minutes continuously.
- When intake air temperature reaches below the temperature of setting temp. -1.0°C.
• Compressor 2 minutes delay
- The compressor can restart minimum 2 minutes later after compressor off.
Temp. differences
over 2.5°C
2.0~2.49°C
1.5~1.99°C
1.0~1.49°C
0.5~0.99°C
0.0~0.49°C
Comp. Operating frequency
Step 12
Step 10
Step 8
Step 4
Step 2
Step 1
[The operating freq. step of comp.]
[The targeting operating freq. of comp. each model]
Model
LS-J0761NL/NM/NN
LS-J0962NL/NM/NN
LS-L1261NL/NM/NN
Comp. Operating frequency
40
47
54
64
74
85
45
53
72
86
95
110
35
47
51
58
62
67
Step 1
Step 2
Step 4
Step 8(Fc)
Step 10
Step 12
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