Portection From Overheating Of Power Module; Portection From Overheating Of Compressor - LG LS-J0762YL/NM/NN/NQ Service Manual

18. Portection from overheating of power module

• If the temperature of the heat sink TH. reaches over Toff, the Compressor stop instantly.
• It will be limited the compressor operating frequency according to the heat sink TH.(refer to below FIG.)
• It will be blink 4 times, when the thermistor is open or short, also the temperature is over Toff.

19. Portection from overheating of compressor

• If the temperature of the discharge pipe of compressor reaches over 130°C or below -30°C the compressor
stop instantly.
• It will be limited the compressor operating frequency according to the compressor dome TH.(Refer to below
Fig.)
• Temperature range by COMP SPEC varies by 10°C.
[The control graph from heat–sink TH]
Comp. off
Target frequency
Comp. free
130°C
118°C
111°C
108°C
Setting frequency
-13°C
-30°C
Toff (95°C)
Fc-2
Ton + 6°C (91°C)
Fc-1
Ton + 3°C (88°C)
Ton (85°C)
OFF
0Hz
Fc-2
101°C
Fc-1
93°C
Fhmin
OFF
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