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Cooling operation
Hot air
Cooling operation
Hot air
Heating operation
Hot air
FS unit
SVS
SVD
SVSS
Suction
gas pipe
Liquid pipe
Discharge
gas pipe
SVDD
Indoor unit
Control wiring between
indoor unit and FS unit
High-pressure gas
Liquid
Liquid
Liquid Liquid
High-pressure gas High-pressure gas
High-
pressure
gas
High-
pressure
gas
High-
pressure
gas
High-
pressure
gas
SVD
SVDD
SVS
SVSS
ON
OFF
OFF
OFF
Heating operation
Cool
air
Heating operation
Cool
air
Cooling operation
Cool
air
FS unit
SVS
SVD
SVSS
Suction
gas pipe
Liquid pipe
Discharge
gas pipe
SVDD
Indoor unit
Control wiring between
indoor unit and FS unit
Liquid
Low-pressure gas
Liquid
Low-pressure gas Low-pressure gas
Liquid Liquid
Low-
pressure
gas
SVD
SVDD
SVS
SVSS
OFF
OFF
ON
ON
Cooling operation
Thermo ON
Cooling operation
Thermo ON
Cooling operation
Thermo OFF
FS unit
SVS
SVD
SVSS
Suction
gas pipe
Liquid pipe
Discharge
gas pipe
SVDD
Indoor unit
Control wiring between
indoor unit and FS unit
SVD
SVDD
SVS
SVSS
OFF
OFF
OFF
ON
n In case of not setting 01 to Item code “0E”
When more than one indoor unit has been set up as a group to one FS unit and you have forgotten to set 01
on Item code “0E” on all the indoor units, the following may occur:
1) When AUTO operation is selected on the remote controller and cooling operation and heating operation
are required, hot air may be discharged from the cooling operation unit or cool air may be discharged
from the heating operation unit (or fan stops).
However in case of 2 , “L18” error code is output and the air conditioner stops.
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2) When the cooling thermostat of the indoor unit that is connected to the FS unit has been off, the refriger-
ant will not flow and cooling air may not discharge evenly if the thermostats of the other cooling operation
units are on.
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