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4. Room Temperature Thermistor Circuit
● Fig. 4-1 shows the room temperature
thermistor circuit.
5. Heat exchanger temperature thermistor circuit
● The voltage at depends on the room
temperature as shown in Fig. 4-2.
● The circuit detects the indoor heat
exchanger temperature and controls
the following.
(1) Preheating.
(2) Low-temperature defrosting
during cooling and dehumidifying
operation.
(3) Detection of the reversing valve
non-operation or heat exchanger
temperature thermistor open.
The voltage at depends on the
heat exchanger temperature as shown
in Fig. 5-2.
A
A
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