Toshiba MMU-AP0091H Case of not setting 01 to Item code 0E, Svs Off, Svd Off, SVD OFF Svdd SVS

nIn 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.

1
FS unit	High-pressure gas	High-pressure gas	High-pressure gas
Suction				High-
gas pipe
				pressure
High-	SVS	High-	High-	gas
pressure	SVSS	pressure	pressure
Discharge gas	SVDD	gas	gas
gas pipe	Liquid	Liquid	Liquid
Liquid pipe	SVD
Liquid

Indoor unit

		Control wiring between	Heating operation		Cooling operation		Cooling operation
SVD	ON
		indoor unit and FS unit
SVDD	OFF
				Hot air		Hot air		Hot air
SVS	OFF
SVSS	OFF

2
Suction	FS unit			Low-pressure gas	Low-pressure gas	Low-pressure gas
gas pipe
	Low-	SVS
	pressure		SVSS
Discharge	gas	SVDD		Liquid	Liquid	Liquid
gas pipe
Liquid pipe		SVD
Liquid			Indoor unit
			Control wiring between	Cooling operation	Heating operation	Heating operation
SVD	OFF
			indoor unit and FS unit
SVDD	OFF			Cool	Cool	Cool
SVS	ON
				air	air	air
SVSS	ON

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.

3

	FS unit
Suction
gas pipe
	SVS
	SVSS
Discharge	SVDD
gas pipe
Liquid pipe	SVD

SVD	OFF
SVDD	OFF
SVS	OFF
SVSS	ON

Indoor unit

Control wiring between indoor unit and FS unit

Cooling operation

Thermo OFF

Cooling operation

Thermo ON

Cooling operation

Thermo ON

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