Outdoor Unit - LG AS-W0964DH0 Service Manual

Outdoor Unit

Power Relay Control
• If power is on, it will operate to chage capacitor on controller and power relay will operate after about 2~5sec.
Active Power Filter Control(PSC)
• The active power filter is designed to correct power factor(cos ) and to regulate DC link voltage.
• It will be operated PFC circuit when the compressor freq. is over 30Hz and wattage is over 450 watt.
Comp. Freq. Control
• The final operating freq. of comp. is set the lowest freq. that limited outdoor temp., discharge pipe temp.,
heat-sink temp., target freq., owing to CT.
OverheatIng. Protection(Power Module)
• When the temp. of power module increases to 85°C, controller decreases Freq. of Comp.
Freq. Speed Control(Up/Down Speed)
• It will be changed the drive freq. of comp. according to temp. of indoor and outdoor.
Total Current Control (Over Current Protection)
DC Peak Current Control
4 way Valve Control
• It is only operated in the heating operation mode except defrosting operation.
Outdoor Fan Motor Control
• High speed
- Although fan motor speed is middle, it will change high speed in case of below AC193V, over 45°C of
outdoor temp., and over fc, fh of comp. Freq.
• Middle speed
- Nomal mode
• Low speed
- Although fan motor speed is middle, it will change Low speed in case of over AC 270V, over 21°C
(Heating Mode) of outdoor temp. below 24°C (Cooling Mode) of outdoor temp.
Discharge Pipe Temp. Control
Low Ambient
Comp. Torque Control
Over Heating Protection (Comp.)
Functions
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