Toshiba MCY-MHP0404HT-C Service Manual page 30

Explanation of functional parts
Functional part na m e
SV2
Solenoid valve
SV4
SV5
4-way valve
Pulse motor
PMV1
valve
TD
TS
Temp. sensor
TE
TL
TO
High pressure
sensor
Pressure sensor
Low pressure
sensor
(Hot gas bypass) (Connector CN311 : White)
1) Low pressure release function
2) High pressure release function
3) Gas balance function during stop time
4) Hot gas bypass into accumulator
(Start compensation valve of compressor)
(Connector CN312: Red)
1) For gas balance start
2) High pressure release function
3) Low pressure release function
(Connector CN314 : White)
1) Preventive function for highpressure rising in heating operation
(Connector CN317: Blue)
1) Cooling / heating exchange
2) Reverse defrost
(Connector CN300: White)
1) Super heat control function in heating operation
2) Liquid line shut-down function while follower unit stops
3) Under cool adjustment function in cooling operation
(Connector CN502: White)
1) Protection of compressor discharge temp.
2) Used for discharge temperature release
(Connector CN505: White)
1) Controls PMV super heat in heating operation
(Connector CN520: Green)
1) Controls defrost in heating operation
2) Controls outdoor fan in heating operation
(Connector CN523: White)
1) Detects under cool in cooling operation
(Connector CN507: Yellow)
1) Detects outside temperature
(Connector CN501: Red)
1) Detects high pressure and controls compressor capacity
2) Detects high pressure in cooling operation, and controls the fan in low ambient cooling operation
3) Detects under cool in indoor unit in heating operation
(Connector CN500: White)
1) Detects low pressure in cooling operation, and controls compressor capacity
2) Detects low pressure in heating operation, and controls the super heat
F u n t c o i n l a o u l t n i e
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