LG LS-J0762YL, Service Manual

Page: 23 / 79

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.
-23-
Comp. off
Comp. free
Fc-1
Fc-2
Target frequency
Toff (95
°
C)
Ton + 3
°
C (88
°
C)
Ton + 6
°
C (91
°
C)
Ton (85
°
C)
130
°
C
118
°
C
111
°
C
108
°
C
-13
°
C
-30
°
C
101
°
C
93
°
C
Fhmin
OFF
OFF
0Hz
Fc-2
Fc-1
Setting frequency
[The control graph from heat–sink TH]