LG AS-W096URH0/UBH0/UWH0/UMH0 Service Manual page 44

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
44 Room Air Conditioner
Fc-2 Fc-1 Fc-2
D-Pipe Temp.
Free Fc-1 Fc-2 OFF
Heat Sink Temp.
No.
1
2
3
4
OFF Free
∆T = (T off - T2)/2
No.
T1 = T2 + 2 * ∆T
T3 = T2 + ∆T
1
2
3
4
Fc-2 Fc-1 Free
MODEL T on
AS-W096U_0 Series 85
AS-W126U_0 Series 85
AS-W096U_1 Series 85
AS-W126U_1 Series 85
MODEL T on
AS-W096U_0 Series 102
AS-W126U_0 Series 88
AS-W096U_1 Series 95
AS-W126U_1 Series 95
T off
95
95
95
95
T off
110
100
105
105