LG Electronics AS-W096URH0/UBH0/UWH0/UMH0 service manual Protection from total current control

Operation

Protection from totalcurrentcontrol

■CT1 control

•If the operating current reaches I1, the operating frequency of the compressor decrease.

•After decreasing the operating frequency by 1step, if operating current is below I1 for 60 seconds continuous- ly, the operating frequency of compressor increase by 1step.

■CT2 control

•If the operating current of the appliance reaches I2, the compressor stop instantly and 2 minutes later the compressor restart again.

•If CT2 occurs 5 times within 1hour, the appliance turn off and display ERROR CODE 7.

	Control table	❇ I1:Current of operating frequency down
		I2: Current of compressor cut off
				I1				I2
	Model	Outdoor temp ≥ 38°C			Outdoor temp < 38°C
		Cooling	Heating		Cooling	Heating
1	AS-W096U_0 Series	6.5	8.5		7	9	12
2	AS-W126U_0 Series	6.5	7.5		7	8	10
3	AS-W096U_1 Series	5.5	7		6	7.5	9
4	AS-W126U_1 Series	6	7.5		6.5	8	10

cf. I1 is set the lowest level between intial value and in case dectection of dc paeak current.

Protection from DCPeak Current

■DC Peak Current Error by a fault signal of IPM

•If the operating current of IPM reaches 35A ±3A, the compressor stop instantly.

•If DC PEAK occurs 5 times within 1 hour, the appliance turns off and display ERROR CODE 6.

■DC Peak Current Error by the compressor lock

•If the DC LINK voltage below DC 140V occurs 5 times within 1 hour while the compressor is operating, the appliance turns off and display ERROR CODE 6.

■DC Peak Current Error by the Outdoor Fan Lock

•If it’s 5 times within 1 hour in case of the temperature of outdoor pipe TH is over 65°C while the compressor is operating, the appliance turns off and display ERROR CODE 6.

Service Manual 43