Toshiba SMMS-e Quick Reference page 13

Refrigerant Piping Systematic
E xplanation of F unc tional P arts
37
<C ooling, Heat pump type>
Functional part name
Solenoid valve
4-way valve
Pulese motor
valve
Oil separator
Temp. Sensor
Pressure sensor
Heater
Balance pipe
High pressure switch
(4.15MPa)
(Hot gas bypass) (Connector CN311: White)
1) Low pressure release function
SV2
2) High pressure release function
3) Gas balance function during stop time
(Connector CN321: White)
SV3A
1) Supplies oil reserved in the oil header during ON time.
(Connector CN321: White)
SV3B
1) Returns oil supplied in the balance pipe to the compressor.
(Connector CN321: White)
SV3C
1) Pressurizes oil reserved in the oil header during ON time.
(Connector CN322: White)
SV3D 1) Reserves oil in the oil separator during OFF time.
2) Returns oil reserved in the oil separator to the compressor during ON time.
(Start assure valve of compressor)
SV41
(SV41 Connector CN312: Blue, SV42 Connector CN312: Blue.
SV42 1) For gas balance start
2) High pressure release function
3) Low pressure release function
(Connector CN314: White)
SV51
1) Gas injection function during hot gas defrost in heating operation
(Connector CN314: White)
1) Preventive function for high-pressure rising in heating operation
SV52
2) Gas injection function during hot gas defrost in heating operation
(Connector CN317:Blue)
1) Cooling/heating exchange
2) Reverse defrost
(PMV1 Connector CN300: White, PMV3 Connector CN302: Blue)
1) Super heat control function in heating operation
2) Liquid line shut-down function while follower unit stops
PMV1, 3
3) Subcool adjustment function in cooling operation
4) Exchange function between main and sub exchangers in cooling operation
(Connector CN303: Red)
1) Subcool adjustment function in cooling operation
PMV4
2) Liquid bypass function for discharge temperature release (cooling bypass function)
1) Prevention for rapid decreasing of oil (Decreases oil flowing to the cycle)
2) Reserve function of surplus oil
(TD1 Connector CN502: White, TD2 Connector CN503: Pink )
TD1
1) Protection of compressor discharge temp.
TD2
2) Used for dischage temperature release
(Connector CN505: White)
1) Controls PMV1 super heat in heating operation
TS1
2) Protection of compressor
(Connector CN903: Purple)
TS3
1) Controls PMV4 super heat in heating operation
TG1
(TG1 Connector CN525: Blue, TG2 Connector CN526: White )
1) Controls PMV1 super heat in heating operation
TG2
(TE1 Connector CN520: Green, TE2 Connector CN521: Red )
TE1
1) Controls defrost in heating operation
TE2
2) Controls outdoor fan in heating operation
(TK1 Connector CN531: Black, TK2 Connector CN532: Green, TK4 Connector CN534: Yellow,
TK1,TK2
TK5 Connector CN535: Red)
TK4,TK5
1) Judges oil level of the compressor
(TL1 Connector CN523: White, TL2 Connector CN524: Gray, TL3 Connector CN902: Pink)
TL1,TL2
1) Detects subcool in cooling operation
TL3
(Connector CN507: Yellow)
TO
1) Detects outside temperature
(Connector CN501: Red)
High pressure 1) Detects high pressure and controls compressor capacity
sensor 2) Detects high pressure in cooling operation, and controls the fan in low ambient cooling operation
3) Detects subcool in indoor unit in heating operation
(Connector CN500: White)
Low pressure
1) Detects low pressure in cooling operation and controls compressor capacity
sensor
2) Detects low pressure in heating operation, and controls the super heat
Compressor (Compressor 1 Connector CN331: White, Compressor 2 Connector CN332: Blue.
case heater 1) Prevents liquid accumulation to compressor
Accumulator (Connector CN334: Red)
case heater 1) Prevents liquid accumulation to accumulator
1) Oil balancing in each outdoor unit
High pressure SW 1 (High pressure SW 1,2 Connector CN251: BLK)
High pressure SW 2 1) Piping resisting pressure protection
<Explanation of Functional Parts>
Functional outline
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