Toshiba MAR-C104M8-1-PE Service Manual page 55

10.6 Multi controller sensor operation.
Temperature
sensor
10.7 Outdoor unit – Sensor and switch operation.
Discharge pressure
sensor
Suction temperature
sensor (ThS)
Discharge temperature
sensor (ThD1, ThD2)
Outdoor unit heat
exchanger sensor (TE)
Heating operation
Outdoor temperature
sensor (ThO)
3-Pipe ONLY
High pressure switch
Low pressure switch
According to a difference between the evaporator outlet temperature and
(ThA, B, C, D) saturation temperature (ThX):
a. Performs Superheat control.
(cooling operation)
b. Determines the degree of opening of PMV 2.
(cooling dominant operation – 3-Pipe ONLY)
Determines the frequency of the inverter compressor and the ON/OFF
status of D.O.L compressor.
Controls the Outdoor unit fan operation.
Controls the hot gas bypass SV2.
Controls the changeover from Outdoor unit main heat exchanger to sub heat
exchanger. (MAR-M104HTM8-1-PE / MAR-F104HTM8-1-PE only)
Controls the degree of opening of PMV 1.
Stops operation when ThS > 40°C for 10 minutes.
Controls the degree of opening of PMV 1.
Stops operation when the discharge temperature > 130°C.
Controls the defrost operation.
Controls the Outdoor unit fan operation.
Controls the high pressure release valve SV1.
Controls the hot gas bypass SV2.
Controls the Outdoor unit fan operation.
Prevents heating operation when ThO > 25°C.
Stops operation when Pd > 30kgf/cm
Stops operation when suction pressure < 0.25kgf/cm
• After 30 seconds for cooling operation.
• After 10 minutes for heating operation.
The low pressure switch is ignored during
defrost operation.
}
}
2 G.
}
58
MAR-M104HTM8-1-PE,
MAR-F104HTM8-1-PE
only
MAR-M104HTM8-1-PE,
MAR-F104HTM8-1-PE
only
2 G:-
MAR-M104HTM8-1-PE,
MAR-F104HTM8-1-PE
only