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In low outside temperature (15°C or less: Criterion)
(Note 1) SV4 on the stopped compressor is ON.
Outdoor unit Flow selector/Indoor unit
4-way valve OFF SV3A OFF
Cooling thermo.-ON Stop
SV4 (n) (Note 1) SV3B OFF SVD OFF SVD OFF
SV5 ON SV3C OFF SVS ON SVS OFF
SV6 Control SV3D Control SVDD OFF SVDD OFF
SV11 OFF SV3E ON SVSS ON SVSS ON
SV12 OFF PMV1, 2 Control PMV Control PMV Close
Outdoor fan Control PMV3 Close
FM
Sensor
TO
TS1
TS2
TL
Main heat exchanger
SV2
SV12
TE1
SV5
SV41
SV3A
SV3E
SV3B
SV3D
SV6
SV11
SV3C
4-Way valve
OFF
Accumulator
Pd sensor
Pd sensor
TK1
TK4
TK3
SV42
HPHP
Compressor 2
(Inverter)
Compressor 1
(Inverter)
TK2
TD2
TD1
Liquid
tank
Oil tank
PMV1 PMV2
PMV3
Main heat exchanger
OS
STST
SVD
SVS
SVDD SVSS
Cooling
FS unit
Indoor unit
TCJ
TC2
TC1
PMV
STST
SVD
SVS
SVDD SVSS
Cooling
TCJ
TC2
TC1
PMV
STST
SVD
SVS
SVDD SVSS
Cooling
TCJ
TC2
TC1
PMV
STST
SVD
SVS
SVDD SVSS
Stop
TCJ
TC2
TC1
PMV
Suction gas pipe
Discharge gas pipe
Liquid pipe
Header unit
FM
Sensor
TO
TS1
TS2
TL
Main heat exchanger
SV2
SV12
TE1
SV5
SV41
SV3A
SV3E
SV3B
SV3D
SV6
SV11
SV3C
4-Way valve
OFF
Accumulator
Pd sensor
Pd sensor
TK1
TK4
TK3
SV42
HPHP
Compressor 2
(Inverter)
Compressor 1
(Inverter)
TK2
TD2
TD1
Liquid
tank
Oil tank
PMV1 PMV2
PMV3
Main heat exchanger
OS
Follower unit
High pressure gas or condensed liquid refrigerant
Low pressure gas refrigerant
Low pressure gas refrigerant (Refrigerant recovery line)
High pressure refrigerant (Push-in circuit)