LG ABNH186HLAC, Service Manual

Page: 130 / 175

134 Universal System Air Conditioner
Outdoor Units
2.2 Low ambient control
2.2.1 The outline of Low ambient control.
: The control device makes [the outdoor_unit] operate the Cooling mode in low-temperature condition with-
out overloading the comp.
If the Temp. of outdoor_unit goes down, The Evaporator will start freezing and the liquid refrigerant will
flow inside the Compressor.
For preventing the situation,the Fan Speed of outdoor unit is reduced to 40% lower than Full speed
according to the piping Temp. of outdoor unit.
This operation makes the CYCLE Temp to rise (=FAN control contents).
2.2.2 The particular contents of Low ambient control process
- The fan of outdoor_unit operates at Full speed when the COMP is On for 3 seconds(OPTION)
- The fan of outdoor_unit control is controlled according to the Temp.of outdoor_unit and the pipe temp.of
outdoor_unit.(OPTION)
- If the established base Temp.is more than PRESET TEMPERATURE, The fan of outdoor_unit will be
operated at HIGH Speed.
- If the established base Temp.is lower than PRESET TEMPERATURE, The outdoor_unit will be operated
at Low ambient control.
(If The LOW AMBIENT function isn't used, the outdoor unit fan will be operated at 2 conditions
(STOP,HIGH).
FAN ON
°
C
(OPTION)
FAN OFF
°
C
(OPTION)
The Temp. of outdoor and
the pipe Temp. of outdoor
The fan of outdoor
Setting fan
speed
Setting fan
speed
Setting fan
speed
Off Off
PRESET
(OPTION)
HIGH