Toshiba SMMS-u MMY-MUP0801HT8 Quick Reference Download Page 121

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Functional Part Name

SV3D

(Connector CN324

㧦

WHI)

1) Reserves oil in the oil separator during OFF time.
2) Returns oil reserved in the oil separator to the compressor during ON time.

SV3F

(Connector CN324: WHI)
1) Supplies oil in the accumulator to the compressor
2) Shuts off the liquid refrigerant from the accumulator when the compressor dilution

Pulse Motor
Valve

PMV1

(Connector CN300

㧦

WHI)

1) Controls superheat and subcool of the main heat exchanger
2) Stored liquid refrigerant reduction control in low ambient cooling operation
(recovers stored liquid refrigerant in the main heat exchanger)

Pressure
Sensor

High pressure
sensor

(Connector CN501

㧦

RED)

1) Detects high pressure
2) Controls the fan in low ambient cooling operation
3) Detects subcool of indoor units in heating operation

Heater

Compressor
case heater

(Comp1 • • • Connector CN331

㧦

WHI , Comp2 • • • Connector CN332

㧦

BLU)

1) Prevents liquid refrigerant accumulation in the compressor

SV41
SV42

(SV41 • • • Connector CN324

㧦

WHI , SV42 • • • Connector CN327

㧦

BLK)

1) High/Low pressure balance
Prevention of subcool oil backflow when compressor stop, start-up compensation when starting up
the compressor, reducing refrigerant noise when starting up heating operation
2) High pressure release function
3) Low pressure release function
4) Keeps the compressor reliability when Hot Gas Bypass system (prevent dilution with oil)
5) Releases capacity (Refrigerant mass bypass function in minimum cooling operation)

PMV2
PMV3

(PMV2 • • • Connector CN301

㧦

WHI , PMV3 • • • Connector CN302

㧦

BLU)

1) Controls superheat and subcool of the sub heat exchanger
2) Maintains discharge pressure in low ambient cooling operation

PMV4

(Connector CN303

㧦

RED)

1) Controls superheat and subcool of the sub-cooling heat exchanger
2) Liquid bypass function for discharge temperature releases (cooling bypass function)

4-Way valve

(Connector CN317

㧦

ORN)

1) Cooling/Heating change
2) Reverses Defrost

Temperature
Sensor

TD1
TD2

(TD1 • • • Connector CN502

㧦

WHI , TD2 • • • Connector CN380

㧦

BLK)

1) Protection of compressor discharge temperature
2) Used for discharge temperature release

TG1
TG2
TG3

(TG1 • • • Connector CN381

㧦

WHI , TG2 • • • Connector CN381

㧦

WHI ,

TG3 • • • Connector CN384

㧦

BLU)

1) Controls superheat of PMV in heating operation

TE1

(Connector CN381

㧦

WHI)

1) Controls the main heat exchanger defrost in heating operation
2) Controls outdoor fan in heating operation

TE2
TE3

(TE2 • • • Connector CN381

㧦

WHI , TE3 • • • Connector CN384

㧦

BLU)

1) Controls the main heat exchanger defrost in heating operation
2) Controls outdoor fan in heating operation

TL1

(Connector CN378

㧦

WHI)

1) Detects the main heat exchanger subcool in cooling operation
2) Use as main complement switching during cooling operation

TL2

(Connector CN378

㧦

WHI)

1) Detects subcool of the sub-cooling heat exchanger in cooling operation
2) Use as main complement switching in cooling operation [3 way variable heat exchanger]

Low pressure
sensor

(Connector CN500

㧦

WHI)

1) Detects low pressure
2) Controls superheat in heating operation

TL3

(Connector CN378

㧦

WHI)

1) Controls subcool of the sub-cooling heat exchanger

TS1

(Connector CN378