Toshiba MMU-AP0091H service manual Mainly Heating, Partly Cooling Operation

5-5. Mainly Heating, Partly Cooling Operation

(Cooling/heating simultaneous operation with subjective heating operation)

Header unit		Follower unit
FM		FM
TE1	Sensor	TE1	Sensor
Main heat exchanger		Main heat exchanger
	TO		TO
Main heat exchanger *		Main heat exchanger *
SV12		SV12
PMV1 PMV2		PMV1 PMV2
PMV3	4-Way valve ON	PMV3	4-Way valve ON
SV11	TS1	SV11	TS1
SV5	Pd	SV5	Pd
	sensor		sensor

TS2 TS2

		Pd sensor			Pd sensor
TL	SV6	SV2	TL	SV6	SV2

		OS			OS
	SV3D			SV3D
Liquid	SV41	SV42	Liquid	SV41	SV42
tank			tank
	HP	HP		HP	HP
		Accumulator			Accumulator

TD1			SV3C	TD2	TD1			SV3C	TD2
1		TK3		2	1		TK3		2
Compressor	(Inverter)			Compressor (Inverter)	Compressor	(Inverter)			Compressor (Inverter)
		TK1	TK2				TK1	TK2
			Oil tank					Oil tank
SV3E		TK4			SV3E		TK4

SV3A

SV3A

SV3B

SV3B

Suction gas pipe

Discharge gas pipe

Liquid pipe

FS unit	SVS
	SVD
	SVDD SVSS

SVS

SVD

SVDD SVSS

SVS	SVS
SVD	SVD
SVDD SVSS	SVDD SVSS

Indoor unit

STST

STST

ST ST ST ST

PMV	TC1
TC2
TCJ

PMV	TC1
TC2
TCJ

PMV	TC1	PMV	TC1
TC2		TC2
TCJ		TCJ

Heating Heating

High pressure gas or condensed liquid refrigerant

Low pressure gas refrigerant

Stop Cooling

Low pressure gas refrigerant (Refrigerant recovery line)

High pressure refrigerant (Push-in circuit)

		Outdoor unit					Flow selector/Indoor unit
	4-way valve	ON	SV3A	OFF	Cooling thermo.-ON			Heating thermo.-ON			Stop
	SV4 (n)	(Note 1)	SV3B	OFF	SVD	OFF		SVD	ON	SVD	OFF
	SV5	OFF	SV3C	OFF	SVS	ON		SVS	OFF	SVS	OFF
	SV6	Control	SV3D	Control	SVDD	OFF		SVDD	OFF	SVDD	OFF
	SV11	ON	SV3E	ON	SVSS	ON		SVSS	OFF	SVSS	ON
	SV12	Close (Note 2)	PMV1, 2	Control	PMV	Control		PMV	Control	PMV	Close
	Outdoor fan	Control	PMV3	Close (Note 2)
(Note 1) SV4 on the stopped compressor is ON.					(Note 2) May be controlled.

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