Outdoor Unit; Power Relay Control; Comp. Freq. Control - LG A2UN186FA0 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
10sec.

Comp. Freq. control

• The final operating freq. of comp. is set the lowest freq. that limited outdoor temp., discharge pipe temp.,
target freq., owing to CT.
Overheatng. Protection(Power module)
Freq. speed control(up/down speed)
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/Low speed
Discharge pipe temp. control
Overpressure protection
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