LG AS-W096QGG1 Service Manual page 41

Power relay control
• Power relay turns on 1 second later after the power is input to the outdoor unit.
• Control sequence : power on
Protection from total current control
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
Model
1 AS-W096QGG1
3 AS-W126RGH1
4 AS-W186TGH1
5 AS-W246TGH1
cf. I1 is set the lowest level between intial value and in case dectection of dc paeak current.
Protection from DC Peak 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.
PTC operating power relay on
I1:Current of operating frequency down
I2: Current of compressor cut off
Outdoor temp ≥ 38°C
Cooling Heating
5.5 6.5
6.5 7.5
10.5 11.5
13.5 14
I1
Outdoor temp < 38°C
Cooling Heating
6
7
11
14
Operation
I2
7 9
8 10
12 14
14.5 15.5
Service Manual 41