Toshiba MMU-AP0091H All heating operation Operation of heating only, SV3B SV5 OFF SV3C SV6

5-3. All heating operation (Operation of heating only)

Header unit Follower unit

PMV1 PMV2

TL

Liquid

tank

FM		FM
TE1	Sensor	TE1
Main heat exchanger		Main heat exchanger
	TO

Main heat exchanger *			Main heat exchanger *
SV12			SV12
		PMV1	PMV2
PMV3	4-Way valve	OFF	PMV3
SV11		TS1	SV11
SV5		Pd	SV5
		sensor
Pd sensor		TS2	Pd sensor
SV6	SV2	TL	SV6
OS			OS
SV3D			SV3D

SV41				SV42	Liquid	SV41
					tank
HP				HP	Accumulator	HP
TD1			SV3C	TD2		TD1			SV3C
1	(Inverter)			2		1	(Inverter)
Compressor		TK3		Compressor (Inverter)		Compressor		TK3
		TK1	TK2					TK1	TK2
			Oil tank						Oil tank
SV3E		TK4				SV3E		TK4
		SV3A						SV3A
				SV3B

Sensor

TO

4-Way valve OFF

TS1

Pd sensor

TS2

SV2

SV42

HP

Accumulator

TD2 2Compressor (Inverter)

SV3B

Suction gas pipe

Discharge gas pipe

Liquid pipe

FS unit		SVS	SVS
	SVD		SVD
	SVDD SVSS		SVDD SVSS
ST	ST	ST	ST
Indoor unit

PMV	TC1	PMV	TC1
TC2		TC2
TCJ		TCJ

SVS

SVD

SVDD SVSS

STST

PMV	TC1
TC2
TCJ

SVS

SVD

SVDD SVSS

STST

PMV	TC1
TC2
TCJ

Heating Heating

High pressure gas or condensed liquid refrigerant

HeatingStop

Low pressure gas refrigerant (Refrigerant recovery line)

Low pressure gas refrigerant High pressure refrigerant (Push-in circuit)

	Outdoor unit
4-way valve	OFF	SV3A	OFF
SV4 (n)	(Note 1)	SV3B	ON
SV5	OFF	SV3C	OFF
SV6	Control	SV3D	Control
SV11	ON	SV3E	ON
SV12	OFF	PMV1, 2	Control
Outdoor fan	Control	PMV3	Close

		Flow selector/Indoor unit
Heating thermo.-ON		Heating thermo.-OFF			Stop
SVD	ON	SVD	ON	SVD	OFF
SVS	OFF	SVS	OFF	SVS	OFF
SVDD	OFF	SVDD	OFF	SVDD	OFF
SVSS	OFF	SVSS	OFF	SVSS	ON
PMV	Control	PMV	Close	PMV	Close

(Note 1) SV4 on the stopped compressor is ON.

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