Function of Thermistor SiBE121021_C
110 Function and Control
3. Function of Thermistor
★
Illustrations are for 5 room models as representative and have 5 lines of indoor unit system
(A ~ E). 3 room models have 3 lines (A ~ C) and 4 room models have 4 lines (A ~ D).
Cooling Only Model
Heat Pump Model
(1) Outdoor Heat
Exchanger
Thermistor
1. The outdoor heat exchanger thermistor is used for controlling target discharge pipe
temperature. The system sets the target discharge pipe temperature according to the
outdoor and indoor heat exchanger temperature, and controls the electronic expansion valve
opening so that the target discharge pipe temperature can be obtained.
2. In cooling operation, the outdoor heat exchanger thermistor is used for detecting
disconnection of the discharge pipe thermistor. When the discharge pipe temperature
becomes lower than the outdoor heat exchanger temperature, the discharge pipe thermistor
is judged as disconnected.
EVC
EVD
EVE
EVB
EVA
Compressor
Expansion valve
(1)
(2)
(3)
(4)
(R12849)
EDCBA
Four way valve
Compressor
EVC
EVD
EVE
EVB
EVA
Expansion valve
(1)
(2)
(3)
(4)
(5)
(R12850)
EDCBA
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