LG General Wall Mounted-Inverter Type - Manual (Page 25)

Service Manual 25
Part 2 Functions & Controls
5.10 DC Peak control
5.10.1 DC Peak Current Error by a fault signal of IPM
• If the operating current of IPM reaches 35A 3A, the compressor stops instantly.
• If DC PEAK occurs 5 times within 1 hour, the appliance turns off and displays Error Code 6(9,12kBtu/h Model) / Error
Code 21(18,24,30kBtu/h Model).
5.10.2 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(9k,12k Model) / Error Code 23(18k,24k,30k Model).
5.10.3 DC Peak Current Error by the Outdoor Fan Lock
• If this problem occurs 5 times within 1 hour in case of the temperature of outdoor pipe TH is over 65°C(149°F) while
the compressor is operating, the appliance turns off and displays Error Code 6(9,12kBtu/h Model) / Error Code
61(18,24,30kBtu/h Model).
5.11 Discharge Pipe Temp Control
5.11.1 9,12kBtu/h Model
• If the temperature of the discharge pipe of compressor reaches over 130°C(266°F) or below -30°C(-22°F) the com-
pressor stops instantly.
• The compressor operating frequency is limited according to the compressor dome TH. (Refer to below Fig.)
• Temperature range of COMP SPEC varies by 10°C(50°F).
T off : 110°C(230°F) ( Model by model )
T2 : 100°C(212°F) ( Model by model )
D-Pipe Temp.
COMP Freq. Free Free Fh min OFF Fc-1 Fc-1 Fc-2 Fc-2
∆T = (T off - T2)/2
T1 = T2 - 2 * ∆T
T3 = T2 + ∆T
T off °C
T2 °C
T3 °C
T1 °C
-13 °C(8.6°CF)
NOTE: Some Models are different by T1, and T2.