Chore-Tronics® 3 Control Troubleshooting
MT2398C
117
Temperature Sensor reading very
low, but is not stuck on 0° F.
A.) Connections in Temperature
Sensor junction box, and/or I/
O Board have become loose
and/or corroded.
B.) Defective Temperature Sen-
sor.
A.)Check all Temperature Sensor
connections, correct any
problems.
B.) Replace Temperature Sensor.
Temperature Sensor reading very
high or shows a “#” in place of a
temperature reading.
A.) Moisture inside Temperature
Sensor junction box causing
short.
B.) A Break in the Temperature
Sensor wire is causing a
short.
C.) Defective Temperature Sen-
sor.
A.) Remove moisture from Sensor
box and recheck temperature.
B.) Check Sensor wire and wire
connections. Correct any
problems.
C.) Replace Temperature Sensor.
Temperature readings are not
steady (changing half a degree or
more every five seconds). It is
causing Tunnel Fans and heaters
to run at the same time.
There is excessive noise on the
Temperature Sensors. This can be
caused by not using a Twisted Pair
Wire for the Temperature Sensor,
running the Sensor wire inside
conduit with high voltage wire, or
using a shielded wire and ground-
ing the shield.
To prevent noise from bothering
the Sensors, use non-shielded
Twisted Pair Wire (part no.
42208) and run the wire by itself
away from high voltage wires.
Preferably the wire should also
enter the Control in a separate
place from the high voltage wire,
but this is not always possible. Do
not use Romex, SJO cord,
shielded wire, etc. as Tempera
-
ture Sensor wire.
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