LG General Wall Mounted-Inverter Type - Manual (Page 21)

Service Manual 21
Part 2 Functions & Controls
5.8 Overheating Protection (Power Module)
5.8.1 9,12kBtu/h Model
• If the temperature of the heat sink thermistor. reaches over Toff, the Compressor stop instantly.
• The compressor operating frequency is limited according to the heat sink thermistor. (refer to below FIG.)
• It will blink 4 times, when the thermistor is open or short, also when the temperature is over T off.
T off °C
T2 °C
Heat Sink Temp.
T1 °C
T on °C
COMP
Freq.
Free OFF Free Fc-1 Fc-1 Fc-2 Fc-2
∆T = (T off - T on)/3
T1 = T on +
∆T
T2 = T on + 2 * ∆T
T on : 85°C(185°F) (Model by Model)
T off : 95°C(203°F) (Model by Model)
NOTE: Some Models are different by Ton, and Toff.