Table of Contents
Advertisement
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.
Stand by control at low temp.
• If outdoor temp. is below 0°C, preheater is operating for 1~5min.
• At the initial, It will be operated compressor after 1min. for preheating.
Active power filter control(PSC)
• The active power filter is designed to correct power factor(cos
• 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.
Overheatng. 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.
V/F control
• It will be changed the drive voltage of comp. according to operating frequency.
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
Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
θ) and to regulate DC link voltage.
- 31 -
Functions
LGE Internal Use Only
- Quick Links:
- Self-Diagnosis Function
- Outdoor Unit
Hide quick links:
Advertisement
Table of Contents
