8 overheating protection (power module), Service manual 21 part 2 functions & controls – LG General Wall Mounted-Inverter Type User Manual
Page 21
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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.
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