RTHD and RTAC - Trane

Sensor Checkout Procedure
Is the sensor
bound and
communicating?
CAUTION
Equipment
Damage Possible!
Temperature Sensor
All of the temperature sensors used on CH530 are negative temperature
coefficient (NTC) thermistors and located in thermal wells. The thermistors all
have a base resistance of 10 kOhms at 77 F (25C). The sensors have a probe
range of -40 to 120 F and should have an accuracy of ± 1F.
Figure 9 Temperature Sensor
Connect TechView and get into Binding View. This will shut the chiller down.
Once in Binding View, verify that the Temperature Sensor is bound.
Note: Please refer to Service Tool for questions concerning binding LLIDs and
getting into Binding View.
If there are multiple LLIDs that are not verified go to IPC troubleshooting.
If the sensor is not bound, try to bind it. If the sensor will not bind it could be a
problem with the connector or the sensor itself. Take a close look at the
connector to make sure that all four wires are securely in place. It may be
necessary to remove the cap to check for broken or misplaced wires.
All units built before October 1, 2002 (U02#####) used connectors that must be
replaced if the cap is removed. If the cap is removed on any of these units cut out
the old connector and splice in a new section of cable and a new connector. See
Section 2-IPC Overview for instruction on installing a new cap.
If the sensor is bound, try to turn the LED on with a magnet. If the light will not
turn on there could be a problem with the sensor. Try to turn the light on in
Binding View. With the light on hold the magnet to the LED. The LED should get
16 RLC-SVD05A-EN
LED