Toshiba MMY-MUP0801HT8P-TR Service Manual page 42

Functional Part Name
SV3D
SV3F
SV41
SV42
4-Way valve
Pulse Motor PMV1
Valve
PMV2
PMV3
PMV4
Oil Separator
Temperature TD1
Sensor TD2
TG1
TG2
TG3
TE1
TE2
TE3
TL1
TL2
TL3
TS1
TS3
TO
TK1
TK2
Pressure High pressure
Sensor sensor
Low pressure
sensor
Heater Compressor
case heater
(Connector CN324 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.
(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
(SV41 • • • Connector CN324 WHI , SV42 • • • Connector CN327 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)
(Connector CN317 ORN)
1) Cooling/Heating exchange
2) Reverses Defrost
(Connector CN300 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)
(PMV2 • • • Connector CN301 WHI , PMV3 • • • Connector CN302 BLU)
1) Controls superheat and subcool of the sub heat exchanger
2) Maintains discharge pressure in low ambient cooling operation
(Connector CN303 RED)
1) Controls superheat and subcool of the sub-cooling heat exchanger
2) Liquid bypass function for discharge temperature releases (cooling bypass function)
1) Prevention for rapid decreasing oil (Decreases oil flowing to the cycle)
2) Reserve function of excess oil
(TD1 • • • Connector CN502 WHI , TD2 • • • Connector CN380 BLK)
1) Protection of compressor discharge temperature
2) Used for discharge temperature release
(TG1 • • • Connector CN381 WHI , TG2 • • • Connector CN381 WHI ,
TG3 • • • Connector CN384 BLU)
1) Controls superheat of PMV in heating operation
(Connector CN381 WHI)
1) Controls the main heat exchanger defrost in heating operation
2) Controls outdoor fan in heating operation
(TE2 • • • Connector CN381 WHI , TE3 • • • Connector CN384 BLU)
1) Controls the main heat exchanger defrost in heating operation
2) Controls outdoor fan in heating operation
(Connector CN378 WHI)
1) Detects the main heat exchanger subcool in cooling operation
2) Use as main complement switching during cooling operation
(Connector CN378 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]
(Connector CN378 WHI)
1) Controls subcool of the sub-cooling heat exchanger
(Connector CN378 WHI)
1) Controls PMV superheat in heating operation
(Connector CN378 WHI)
1) Controls subcool of the sub-cooling heat exchanger
(Connector CN507 YEL)
1) Detects outside temperature
(TK1 • • • Connector CN502 WHI , TK2 • • • Connector CN380
1) Judges oil level of the compressor
(Connector CN501 RED)
1) Detects high pressure
2) Controls the fan in low ambient cooling operation
3) Detects subcool of indoor units in heating operation
(Connector CN500 WHI)
1) Detects low pressure
2) Controls superheat in heating operation
(Comp1 • • • Connector CN331 WHI , Comp2 • • • Connector CN332 BLU)
1) Prevents liquid refrigerant accumulation in the compressor
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BLK)