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.)
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Only for training and service purposes
[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
- 25 -
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
LGE Internal Use Only