Installation manual
17
ENGLISH
Setting and using method
Notes
• IDU Fan logic, depending on model selected, may delay IDU fan operation momentarily during a cold
start heat call. This function allows IDU coil to warm up prior to operating fan in some IDU models.
• Thermostats that use resistive anticipation are not supported at this time.
• Verify documentation of desired thermostat so that the logic is same as shown in the table above.
NOT
USE
CHANGE
OVER_SW
VOL
T
NON
VOL
T
Thermostat
LG does not supply this section
(Field supply)
CHANGEOVER_SW
RESET_SW
CN_Ther/Oper
CN_MODE
CN_WIND
CN_INDOOR
DISPLAY_LED
TEMP_SW
SETTING_SW
CN_OUT
CN_PI485
LOW
MIDDLE
HIGH
H
H
N
H H
Operation
FA
N
HEA
T
COOL
COMM
C
24 V~
R G W Y
■
For conventional thermostat signal input
Thermostat Fan & System Switch
Input
IDU Response
[Mode / Thermal / Fan]
FAN
[Auto / On]
MODE
[Cool / Heat / Off]
Operation
FAN
[G]
HEAT
[W]
COOL
[Y]
-
-
-
0
-
-
-
Disable Operation
Auto
OFF
-
1
0
0
0
Enable
Cool
RT > SP
1
1
0
1
Cool / On / On
RT < SP
1
0
0
0
Enable
Heat
RT < SP
1
1
1
0
Heat/ On/On
RT > SP
1
0
0
0
Enable
ON
FAN
-
1
1
0
0
Fan/ Off/ On
Cool
RT > SP
1
1
0
1
Cool/ On/ On
RT < SP
1
1
0
0
Fan/ Off/ On
Heat
RT < SP
1
1
1
0
Heat/ On/ On
RT > SP
1
1
0
0
Fan/ Off/ On
