Portection From Overheating Of Power Module; Portection From Overheating Of Compressor - LG AS-W1863 Series Svc Manual

Operation

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.
∆T = (T off - T on)
T1 = T on + ∆T
T2 = T on + 2 * ∆T
T off °C
T2 °C
T1 °C
T on °C
COMP
Free Fc-1
Freq.

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.
COMP Freq.
Fh min
Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Fc-2 Fc-1 Fc-2
D-Pipe Temp.
Free Fc-1 Fc-2 OFF
Heat Sink Temp.
No.
1
2
OFF Free
∆T = (T off - T2)/2
No.
T1 = T2 + 2 * ∆T
T3 = T2 + ∆T
1
2
Fc-2 Fc-1 Free
- 44 -
MODEL T on
AS-W1863_ Series 85
AS-W2463_ Series 85
MODEL T on
AS-W1863_ Series 98
AS-W2463_ Series 98
LGE Internal Use Only
T off
95
95
T off
108
108