Portection From Overheating Of Power Module; Portection From Overheating Of Compressor - LG LS-J0761NL Service Manual

16. 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.

17. 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.)
[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 (84 C)
Fc-2
Ton + 5 C (81 C)
Fc-1
Ton + 2 C (78 C)
Ton (76 C)
OFF
0Hz
Fc-2
101 C
Fc-1
93 C
Fhmin
OFF
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