LG AP-Z Series Service Manual page 19

6. Hot-Start Control
• The indoor fan stops until the evaporator piping temperature will be reached to 28°C.
• During heating operation, if piping temperatures fall below 26°C fan stops.
• The operation diagram is as following.
INDOOR PIPE
INDOOR FAN
COMPRESSOR
7. Defrost Control
• Defrost operation is controlled by timer and sensing temperature of outdoor pipe.
• The first defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed from
starting of heating operation and more than.
• Defrost ends after 10 minutes pass from starting of defrost operation or when the outdoor pipe temperature rises
over 12°C even if before 10 minutes.
• The second defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes pass from
ending of the first defrost and more than.
Outdoor Pipe Temp.
12°C
(Defrost OFF)
-6°C
(Defrost ON)
Indoor Fan
Compressor
4-Way Valve
TEMP.
28°C
26°C
OFF
SPEED
More than 45 minutes of
heating operation
ON
ON
ON
Maximum
1min
Selecting
LOW
fan speed
ON
Within More than 45 minutes of
10 minutes heating operation
Defrost
HOT-
START
OFF
ON
OFF
Operation Details
OFF
Defrost
ON OFF
ON ON
ON OFF
Service Manual 19