LG Electronics AS-W126URH1/UBH1/UWH1/UMH1 Portection from overheating of power module

Operation

Portection from overheatingofpowermodule

•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)						Heat Sink Temp.
	T1 = T on + ∆			T
T off ° C	T2 = T on + 2			* ∆ T
T2 ° C
T1 ° C
T on ° C
COMP	Free	Fc-1	Fc-2		Fc-1	Fc-2	OFF	Free
Freq.

No.	MODEL	T on	T off
1	AS-W096U_0 Series	85	95
2	AS-W126U_0 Series	85	95
3	AS-W096U_1 Series	85	95
4	AS-W126U_1 Series	85	95

Portection from overheatingofcompressor

•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.

	D-Pipe Temp.				∆ T = (T off - T2)/2
					T1 = T2	+ 2	* ∆ T
					T3 = T2	+ ∆	T
COMP Freq. Fh min	Free	Fc-1	Fc-2	OFF	Fc-2	Fc-1		Free

No.	MODEL	T on	T off
1	AS-W096U_0 Series	102	110
2	AS-W126U_0 Series	88	100
3	AS-W096U_1 Series	95	105
4	AS-W126U_1 Series	95	105

44Room Air Conditioner