LG AUUH728C - Heating Mode Operation

Service Manual 131
Function
■ Heating Mode Operation
The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
■ Hot-start Control
The indoor fan does no rotate until the evaporator piping temperature will be reached to 21°C.
The operation diagram is as following.
21 °C
23 °C
32 °C
29 °C
17 °C
Pipe
temperature
OFF
Indoor fan
speed
LO
LOW
LOW
SELECTED
FAN
LOW
LOLOW
COMP ON
COMP
Outdoor fan
Indoor fan
4way valve
Setting Temperature
(Thermo ON)
Setting Temperature
+3°C
(Thermo OFF)
Indoor unit
Heat-Exchanger
temperature
1min
Minimum
3min
1min
3min
Setting
fan
spped
Setting
fan
spped
Setting
fan
spped
ON
ON
ON
ON
Low
LowLowLow
Low
Lo
OffOffOff
ON
OFF
OFF
Low fan during 10sec
A
B
Intake Air Temperature
35°C
32°C
29°C
21°C
17°C