LG ABNH186HLAC, Service Manual

Page: 127 / 175

Outdoor Units
Service Manual 131
(4) Compressor Discharge-Temp. Control
After 1 min. of normal control, if it is satisfied with fomula below, it starts to control of Comp. Discharge
Temp.
Cooling mode : The present degree of superheat
≤
3 (Option)
Heating mode : The target degree of superheat < 0 , The present degree of superheat
≤
0 (Option)
The present degree of superheat
≥
0, The present degree of superheat
≤
5 (Option)
❈
The target degree of superheat is decided for indoor_unit and operation mode.
❈
The target Temp. of discharge pipe is decided for indoor_unit, outdoor_unit and Comp operation Step, the
difference indoor and outdoor.
1.4 Fan control
1) STANDARD STEP : Stop, Operation (2 Step)
2) Phase control : The low Temp.of outdoor (=Cooling), The high Temp. of outdoor (=heating)
→
Control fan On/Off, or Decrease the volume of fan's wind.
(1) COOLING
(2) HEATING
Air
circulation FULL SPEED
SPEED SLOPE
(OPTION)
40
%
OFF
SET POINT
: Outdoor Temp.
or
Outdoor pipe Temp.
(OPTION)
Outdoor Fan
OFF Temp.
(OPTION)
Phase control
OFF
Outdoor Fan
ON Temp.
(OPTION)
FULL SPEED
FULL SPEED
OFF
Outdoor Fan
OFF Temp.
or Outdoor pipe
Temp. (OPTION)
OFF
Outdoor Fan
OFF Temp.
or Outdoor pipe
Temp. (OPTION)
FULL SPEED
Air
circulation
❈
OPTION: Each models have a different establishment.